Sulfur is essential for biological processes such as amino acid biogenesis, iron–sulfur cluster formation, and redox homeostasis. To acquire sulfur-containing compounds from the environment, bacteria have evolved high-affinity uptake systems, predominant among which is the ABC transporter family. Theses membrane-embedded enzymes use the energy of ATP hydrolysis for transmembrane transport of a wide range of biomolecules against concentration gradients. Three distinct bacterial ABC import systems of sulfur-containing compounds have been identified, but the molecular details of their transport mechanism remain poorly characterized. Here we provide results from a biochemical analysis of the purified Escherichia coli YecSC-FliY cysteine/cystine import system. We found that the substrate-binding protein FliY binds l-cystine, l-cysteine, and d-cysteine with micromolar affinities. However, binding of the l- and d-enantiomers induced different conformational changes of FliY, where the l- enantiomer–substrate-binding protein complex interacted more efficiently with the YecSC transporter. YecSC had low basal ATPase activity that was moderately stimulated by apo FliY, more strongly by d-cysteine–bound FliY, and maximally by l-cysteine– or l-cystine–bound FliY. However, at high FliY concentrations, YecSC reached maximal ATPase rates independent of the presence or nature of the substrate. These results suggest that FliY exists in a conformational equilibrium between an open, unliganded form that does not bind to the YecSC transporter and closed, unliganded and closed, liganded forms that bind this transporter with variable affinities but equally stimulate its ATPase activity. These findings differ from previous observations for similar ABC transporters, highlighting the extent of mechanistic diversity in this large protein family.

ATP plays important roles outside the cell, but the mechanism by which it is arrives in the extracellular environment is not clear. Dunn et al. now show that decreases in cellular cholesterol levels mediated by the ABCG1 transporter increase ATP release by volume-regulated anion channels under hypotonic conditions. Importantly, these results may imply that cells that handle cholesterol differently might experience differential extracellular ATP release during hypotonicity.

Purinergic signaling by extracellular ATP regulates a variety of cellular events and is implicated in both normal physiology and pathophysiology. Several molecules have been associated with the release of ATP and other small molecules, but their precise contributions have been difficult to assess because of their complexity and heterogeneity. Here, we report on the results of a gain-of-function screen for modulators of hypotonicity-induced ATP release using HEK-293 cells and murine cerebellar granule neurons, along with bioluminescence, calcium FLIPR, and short hairpin RNA–based gene-silencing assays. This screen utilized the most extensive genome-wide ORF collection to date, covering 90% of human, nonredundant, protein-encoding genes. We identified two ABCG1 (ABC subfamily G member 1) variants, which regulate cellular cholesterol, as modulators of hypotonicity-induced ATP release. We found that cholesterol levels control volume-regulated anion channel–dependent ATP release. These findings reveal novel mechanisms for the regulation of ATP release and volume-regulated anion channel activity and provide critical links among cellular status, cholesterol, and purinergic signaling.

Michael Dean
Jul 1, 2001; 42:1007-1017
Thematic Reviews

ATP plays important roles outside the cell, but the mechanism by which it is arrives in the extracellular environment is not clear. Dunn et al. now show that decreases in cellular cholesterol levels mediated by the ABCG1 transporter increase ATP release by volume-regulated anion channels under hypotonic conditions. Importantly, these results may imply that cells that handle cholesterol differently might experience differential extracellular ATP release during hypotonicity.

Purinergic signaling by extracellular ATP regulates a variety of cellular events and is implicated in both normal physiology and pathophysiology. Several molecules have been associated with the release of ATP and other small molecules, but their precise contributions have been difficult to assess because of their complexity and heterogeneity. Here, we report on the results of a gain-of-function screen for modulators of hypotonicity-induced ATP release using HEK-293 cells and murine cerebellar granule neurons, along with bioluminescence, calcium FLIPR, and short hairpin RNA–based gene-silencing assays. This screen utilized the most extensive genome-wide ORF collection to date, covering 90% of human, nonredundant, protein-encoding genes. We identified two ABCG1 (ABC subfamily G member 1) variants, which regulate cellular cholesterol, as modulators of hypotonicity-induced ATP release. We found that cholesterol levels control volume-regulated anion channel–dependent ATP release. These findings reveal novel mechanisms for the regulation of ATP release and volume-regulated anion channel activity and provide critical links among cellular status, cholesterol, and purinergic signaling.

Sulfur is essential for biological processes such as amino acid biogenesis, iron–sulfur cluster formation, and redox homeostasis. To acquire sulfur-containing compounds from the environment, bacteria have evolved high-affinity uptake systems, predominant among which is the ABC transporter family. Theses membrane-embedded enzymes use the energy of ATP hydrolysis for transmembrane transport of a wide range of biomolecules against concentration gradients. Three distinct bacterial ABC import systems of sulfur-containing compounds have been identified, but the molecular details of their transport mechanism remain poorly characterized. Here we provide results from a biochemical analysis of the purified Escherichia coli YecSC-FliY cysteine/cystine import system. We found that the substrate-binding protein FliY binds l-cystine, l-cysteine, and d-cysteine with micromolar affinities. However, binding of the l- and d-enantiomers induced different conformational changes of FliY, where the l- enantiomer–substrate-binding protein complex interacted more efficiently with the YecSC transporter. YecSC had low basal ATPase activity that was moderately stimulated by apo FliY, more strongly by d-cysteine–bound FliY, and maximally by l-cysteine– or l-cystine–bound FliY. However, at high FliY concentrations, YecSC reached maximal ATPase rates independent of the presence or nature of the substrate. These results suggest that FliY exists in a conformational equilibrium between an open, unliganded form that does not bind to the YecSC transporter and closed, unliganded and closed, liganded forms that bind this transporter with variable affinities but equally stimulate its ATPase activity. These findings differ from previous observations for similar ABC transporters, highlighting the extent of mechanistic diversity in this large protein family.

ATP plays important roles outside the cell, but the mechanism by which it is arrives in the extracellular environment is not clear. Dunn et al. now show that decreases in cellular cholesterol levels mediated by the ABCG1 transporter increase ATP release by volume-regulated anion channels under hypotonic conditions. Importantly, these results may imply that cells that handle cholesterol differently might experience differential extracellular ATP release during hypotonicity.

Purinergic signaling by extracellular ATP regulates a variety of cellular events and is implicated in both normal physiology and pathophysiology. Several molecules have been associated with the release of ATP and other small molecules, but their precise contributions have been difficult to assess because of their complexity and heterogeneity. Here, we report on the results of a gain-of-function screen for modulators of hypotonicity-induced ATP release using HEK-293 cells and murine cerebellar granule neurons, along with bioluminescence, calcium FLIPR, and short hairpin RNA–based gene-silencing assays. This screen utilized the most extensive genome-wide ORF collection to date, covering 90% of human, nonredundant, protein-encoding genes. We identified two ABCG1 (ABC subfamily G member 1) variants, which regulate cellular cholesterol, as modulators of hypotonicity-induced ATP release. We found that cholesterol levels control volume-regulated anion channel–dependent ATP release. These findings reveal novel mechanisms for the regulation of ATP release and volume-regulated anion channel activity and provide critical links among cellular status, cholesterol, and purinergic signaling.

Fatty acid transport protein 2 (FATP2) is highly expressed in the liver, small intestine, and kidney, where it functions in both the transport of exogenous long-chain fatty acids and the activation of very-long-chain fatty acids. Here, using a murine model, we investigated the phenotypic impacts of deleting FATP2, followed by a transcriptomic analysis using unbiased RNA-Seq to identify concomitant changes in the liver transcriptome. WT and FATP2-null (Fatp2−/−) mice (5 weeks) were maintained on a standard chow diet for 6 weeks. The Fatp2−/− mice had reduced weight gain, lowered serum triglyceride, and increased serum cholesterol levels and attenuated dietary fatty acid absorption. Transcriptomic analysis of the liver revealed 258 differentially expressed genes in male Fatp2−/− mice and a total of 91 in female Fatp2−/− mice. These genes mapped to the following gene ontology categories: fatty acid degradation, peroxisome biogenesis, fatty acid synthesis, and retinol and arachidonic acid metabolism. Targeted RT-quantitative PCR verified the altered expression of selected genes. Of note, most of the genes with increased expression were known to be regulated by peroxisome proliferator–activated receptor α (PPARα), suggesting that FATP2 activity is linked to a PPARα-specific proximal ligand. Targeted metabolomic experiments in the Fatp2−/− liver revealed increases of total C16:0, C16:1, and C18:1 fatty acids; increases in lipoxin A4 and prostaglandin J2; and a decrease in 20-hydroxyeicosatetraenoic acid. We conclude that the expression of FATP2 in the liver broadly affects the metabolic landscape through PPARα, indicating that FATP2 provides an important role in liver lipid metabolism through its transport or activation activities.

Chief Justice Patience Roggensack faced backlash for her comment, with some people calling it "elitist" to separate meatpackers from "regular folks."

Fatty acid transport protein 2 (FATP2) is highly expressed in the liver, small intestine, and kidney, where it functions in both the transport of exogenous long-chain fatty acids and the activation of very-long-chain fatty acids. Here, using a murine model, we investigated the phenotypic impacts of deleting FATP2, followed by a transcriptomic analysis using unbiased RNA-Seq to identify concomitant changes in the liver transcriptome. WT and FATP2-null (Fatp2−/−) mice (5 weeks) were maintained on a standard chow diet for 6 weeks. The Fatp2−/− mice had reduced weight gain, lowered serum triglyceride, and increased serum cholesterol levels and attenuated dietary fatty acid absorption. Transcriptomic analysis of the liver revealed 258 differentially expressed genes in male Fatp2−/− mice and a total of 91 in female Fatp2−/− mice. These genes mapped to the following gene ontology categories: fatty acid degradation, peroxisome biogenesis, fatty acid synthesis, and retinol and arachidonic acid metabolism. Targeted RT-quantitative PCR verified the altered expression of selected genes. Of note, most of the genes with increased expression were known to be regulated by peroxisome proliferator–activated receptor α (PPARα), suggesting that FATP2 activity is linked to a PPARα-specific proximal ligand. Targeted metabolomic experiments in the Fatp2−/− liver revealed increases of total C16:0, C16:1, and C18:1 fatty acids; increases in lipoxin A4 and prostaglandin J2; and a decrease in 20-hydroxyeicosatetraenoic acid. We conclude that the expression of FATP2 in the liver broadly affects the metabolic landscape through PPARα, indicating that FATP2 provides an important role in liver lipid metabolism through its transport or activation activities.

Fatty acid transport protein 2 (FATP2) is highly expressed in the liver, small intestine, and kidney, where it functions in both the transport of exogenous long-chain fatty acids and the activation of very-long-chain fatty acids. Here, using a murine model, we investigated the phenotypic impacts of deleting FATP2, followed by a transcriptomic analysis using unbiased RNA-Seq to identify concomitant changes in the liver transcriptome. WT and FATP2-null (Fatp2−/−) mice (5 weeks) were maintained on a standard chow diet for 6 weeks. The Fatp2−/− mice had reduced weight gain, lowered serum triglyceride, and increased serum cholesterol levels and attenuated dietary fatty acid absorption. Transcriptomic analysis of the liver revealed 258 differentially expressed genes in male Fatp2−/− mice and a total of 91 in female Fatp2−/− mice. These genes mapped to the following gene ontology categories: fatty acid degradation, peroxisome biogenesis, fatty acid synthesis, and retinol and arachidonic acid metabolism. Targeted RT-quantitative PCR verified the altered expression of selected genes. Of note, most of the genes with increased expression were known to be regulated by peroxisome proliferator–activated receptor α (PPARα), suggesting that FATP2 activity is linked to a PPARα-specific proximal ligand. Targeted metabolomic experiments in the Fatp2−/− liver revealed increases of total C16:0, C16:1, and C18:1 fatty acids; increases in lipoxin A4 and prostaglandin J2; and a decrease in 20-hydroxyeicosatetraenoic acid. We conclude that the expression of FATP2 in the liver broadly affects the metabolic landscape through PPARα, indicating that FATP2 provides an important role in liver lipid metabolism through its transport or activation activities.

Kotaro Hama
Apr 1, 2020; 61:523-536
Patient-Oriented and Epidemiological Research

X-linked adrenoleukodystrophy (X-ALD) is an inherited disorder caused by deleterious mutations in the ABCD1 gene. The ABCD1 protein transports very long-chain FAs (VLCFAs) from the cytosol into the peroxisome where the VLCFAs are degraded through β-oxidation. ABCD1 dysfunction leads to VLCFA accumulation in individuals with X-ALD. FAs are activated by esterification to CoA before metabolic utilization. However, the intracellular pools and metabolic profiles of individual acyl-CoA esters have not been fully analyzed. In this study, we profiled the acyl-CoA species in fibroblasts from X-ALD patients and in ABCD1-deficient HeLa cells. We found that hexacosenoyl (26:1)-CoA, but not hexacosanoyl (26:0)-CoA, was the most abundantly concentrated among the VLCFA-CoA species in these cells. We also show that 26:1-CoA is mainly synthesized from oleoyl-CoA, and the metabolic turnover rate of 26:1-CoA was almost identical to that of oleoyl-CoA in both WT and ABCD1-deficient HeLa cells. The findings of our study provide precise quantitative and metabolic information of each acyl-CoA species in living cells. Our results suggest that VLCFA is endogenously synthesized as VLCFA-CoA through a FA elongation pathway and is then efficiently converted to other metabolites, such as phospholipids, in the absence of ABCD1.

Sulfur is essential for biological processes such as amino acid biogenesis, iron–sulfur cluster formation, and redox homeostasis. To acquire sulfur-containing compounds from the environment, bacteria have evolved high-affinity uptake systems, predominant among which is the ABC transporter family. Theses membrane-embedded enzymes use the energy of ATP hydrolysis for transmembrane transport of a wide range of biomolecules against concentration gradients. Three distinct bacterial ABC import systems of sulfur-containing compounds have been identified, but the molecular details of their transport mechanism remain poorly characterized. Here we provide results from a biochemical analysis of the purified Escherichia coli YecSC-FliY cysteine/cystine import system. We found that the substrate-binding protein FliY binds l-cystine, l-cysteine, and d-cysteine with micromolar affinities. However, binding of the l- and d-enantiomers induced different conformational changes of FliY, where the l- enantiomer–substrate-binding protein complex interacted more efficiently with the YecSC transporter. YecSC had low basal ATPase activity that was moderately stimulated by apo FliY, more strongly by d-cysteine–bound FliY, and maximally by l-cysteine– or l-cystine–bound FliY. However, at high FliY concentrations, YecSC reached maximal ATPase rates independent of the presence or nature of the substrate. These results suggest that FliY exists in a conformational equilibrium between an open, unliganded form that does not bind to the YecSC transporter and closed, unliganded and closed, liganded forms that bind this transporter with variable affinities but equally stimulate its ATPase activity. These findings differ from previous observations for similar ABC transporters, highlighting the extent of mechanistic diversity in this large protein family.

Hyperglycemia is a potent regulator of endogenous glucose production (EGP). Loss of this ‘glucose effectiveness’ is a major contributor to elevated plasma glucose concentrations in type 2 diabetes (T2D). ATP-sensitive potassium channels (K_ATP channels) in the central nervous system (CNS) have been shown to regulate EGP in humans and rodents. We examined the contribution of central K_ATP channels to glucose effectiveness. Under fixed hormonal conditions (‘pancreatic clamp’ studies), hyperglycemia suppressed EGP by ~50% in both non-diabetic humans and normal Sprague Dawley rats. By contrast, antagonism of K_ATP channels with glyburide significantly reduced the EGP-lowering effect of hyperglycemia in both humans and rats. Furthermore, the effects of glyburide on EGP and gluconeogenic enzymes in rats were abolished by intracerebroventricular (ICV) administration of the KATP channel agonist diazoxide. These findings indicate that about half of EGP suppression by hyperglycemia is mediated by central K_ATP channels. These central mechanisms may offer a novel therapeutic target for improving glycemic control in T2D.

HE Hohmeier
Mar 1, 2000; 49:424-430
Articles

OBJECTIVE

Neonatal diabetes has been shown to be associated with high neuropsychiatric morbidity in a genotype-phenotype–dependent manner. However, the specific impact of different mutations on intellectual functioning is still insufficiently characterized. Specifically, only a small number of subjects with developmental delay have been comprehensively assessed, creating a knowledge gap about patients carrying the heaviest burden.

RESEARCH DESIGN AND METHODS

We assessed the intellectual functioning and mental health of the complete Norwegian population with K_ATP channel neonatal diabetes. Eight sulfonylurea-treated children (five with the p.V59M genotype [KCNJ11]) were assessed using age-matched control subjects with type 1 diabetes. The investigations included a physical and motor developmental examination, cerebral MRI, psychometrical examination, and questionnaires assessing intellectual capabilities and psychiatric morbidity.

RESULTS

A strong genotype-phenotype correlation was found, revealing the p.V59M genotype as highly associated with substantial intellectual disability, with no significant correlation with the time of sulfonylurea initiation. Consistent with previous studies, other genotypes were associated with minor cognitive impairment. Cerebral MRI verified normal brain anatomy in all but one child.

CONCLUSIONS

We here presented a comprehensive assessment of intellectual functioning in the largest cohort of p.V59M subjects to date. The level of intellectual disability revealed not only changes the interpretation of other psychological measures but downplays a strong protective effect of sulfonylurea. Within the scope of this study, we could not find evidence supporting an early treatment start to be beneficial, although a weaker effect cannot be ruled out.

OBJECTIVE

To determine the relationship between ATP7B mutations and diabetes in Wilson disease (WD).

RESEARCH DESIGN AND METHODS

A total of 21 exons and exon-intron boundaries of ATP7B were identified by Sanger sequencing.

RESULTS

Two novel compound heterozygous mutations (c.525 dupA/ Val176Serfs*28 and c.2930 C>T/ p.Thr977Met) were detected in ATP7B. After d-penicillamine (D-PCA) therapy, serum aminotransferase and ceruloplasmin levels in this patient were normalized and levels of HbA_1c decreased. However, when the patient ceased to use D-PCA due to an itchy skin, serum levels of fasting blood glucose increased. Dimercaptosuccinic acid capsules were prescribed and memory recovered to some extent, which was accompanied by decreased insulin dosage for glucose control by 5 units.

CONCLUSIONS

This is the first report of diabetes caused by WD.

The infections and deaths are spread across roughly two farms and 189 meat and processed food factories.

According to the book Electronic Design Automation For Integrated Circuits Handbook there are mutiple algorithms available. Quote from book: "One of the first complete ATPG algorithms is the D-algorithm [9]. Subsequently, other algorithms were proposed, including PODEM [14], FAN [15], and SOCRATES [10]."

I was wondering which algorithms are used in Cadence Modus.

visit News18 Urdu for latest news, breaking news, news headlines and updates from Bharatpur on politics, sports, entertainment, cricket, crime and more.

Zyxel USG/UAG/ATP/VPN/NXC series suffer from an issue where a DNS request can be made by an unauthenticated attacker to either spam a DNS service of a third party with requests that have a spoofed origin or probe whether domain names are present on the internal network behind the firewall.

Despite the growing possibility of a total wipeout of professional tennis this year due to the coronavirus pandemic, ATP Tour chief Andrea Gaudenzi is refusing to give up on 2020 just yet.

ABSTRACT

Mitochondrial Ca²⁺ transport mediated by the uniporter complex (MCUC) plays a key role in the regulation of cell bioenergetics in both trypanosomes and mammals. Here we report that Trypanosoma brucei MCU (TbMCU) subunits interact with subunit c of the mitochondrial ATP synthase (ATPc), as determined by coimmunoprecipitation and split-ubiquitin membrane-based yeast two-hybrid (MYTH) assays. Mutagenesis analysis in combination with MYTH assays suggested that transmembrane helices (TMHs) are determinants of this specific interaction. In situ tagging, followed by immunoprecipitation and immunofluorescence microscopy, revealed that T. brucei ATPc (TbATPc) coimmunoprecipitates with TbMCUC subunits and colocalizes with them to the mitochondria. Blue native PAGE and immunodetection analyses indicated that the TbMCUC is present together with the ATP synthase in a large protein complex with a molecular weight of approximately 900 kDa. Ablation of the TbMCUC subunits by RNA interference (RNAi) significantly increased the AMP/ATP ratio, revealing the downregulation of ATP production in the cells. Interestingly, the direct physical MCU-ATPc interaction is conserved in Trypanosoma cruzi and human cells. Specific interaction between human MCU (HsMCU) and human ATPc (HsATPc) was confirmed in vitro by mutagenesis and MYTH assays and in vivo by coimmunoprecipitation. In summary, our study has identified that MCU complex physically interacts with mitochondrial ATP synthase, possibly forming an MCUC-ATP megacomplex that couples ADP and P_i transport with ATP synthesis, a process that is stimulated by Ca²⁺ in trypanosomes and human cells.

IMPORTANCE The mitochondrial calcium uniporter (MCU) is essential for the regulation of oxidative phosphorylation in mammalian cells, and we have shown that in Trypanosoma brucei, the etiologic agent of sleeping sickness, this channel is essential for its survival and infectivity. Here we reveal that that Trypanosoma brucei MCU subunits interact with subunit c of the mitochondrial ATP synthase (ATPc). Interestingly, the direct physical MCU-ATPc interaction is conserved in T. cruzi and human cells.

Key Points

The a3-subunit of V-ATPase acidifies cytotoxic granules in mouse CD8⁺ T lymphocytes.

Neutralization of luminal pH leads to altered morphology of cytotoxic granules.

Knockdown of a3-subunit disturbs trafficking of cytotoxic granules.

The organic anion transporting polypeptide (OATP)2B1 is localized on the basolateral membrane of hepatocytes and is expressed in enterocytes. Based on its distribution pattern and functional similarity to OATP1B-type transporters, OATP2B1 might have a role in the absorption and disposition of a range of xenobiotics. Although several prescription drugs, including hydroxymethylglutaryl-coenzyme A-CoA reductase inhibitors (statins) such as fluvastatin, are OATP2B1 substrates in vitro, evidence supporting the in vivo relevance of this transporter remains limited, and most has relied on substrate-inhibitor interactions resulting in altered pharmacokinetic properties of the victim drugs. To address this knowledge deficit, we developed and characterized an Oatp2b1-deficient mouse model and evaluated the impact of this transporter on the absorption and disposition of fluvastatin. Consistent with the intestinal localization of Oatp2b1, we found that the genetic deletion or pharmacological inhibition of Oatp2b1 was associated with decreased absorption of fluvastatin by 2- to 3-fold. The availability of a viable Oatp2b1-deficient mouse model provides an opportunity to unequivocally determine the contribution of this transporter to the absorption and drug-drug interaction potential of drugs.

SIGNIFICANCE STATEMENT

The current investigation suggests that mice deficient in Oatp2b1 provide a valuable tool to study the in vivo importance of this transporter. In addition, our studies have identified novel potent inhibitors of OATP2B1 among the class of tyrosine kinase inhibitors, a rapidly expanding class of drugs used in various therapeutic areas that may cause drug-drug interactions with OATP2B1 substrates.

Rafael Nadal revealed this week he was doubtful there will be further tennis in 2020.

MINNEAPOLIS (AP) - As coronavirus hotspots erupted at major U.S. meatpacking plants, experts criticized extremely tight working conditions that made the factories natural high risk contagion locations. But some Midwestern politicians have pointed the finger at the workers' living conditions, suggesting crowded homes bear some blame.

The comments - including ...

REUTERS - ATP World Tour rankings on Monday (last week's rankings in brackets):

by Michael Grabell

On Tuesday, March 31, an emergency room doctor at the main hospital in Grand Island, Nebraska, sent an urgent email to the regional health department: “Numerous patients” from the JBS beef packing plant had tested positive for COVID-19. The plant, he feared, was becoming a coronavirus “hot spot.”

The town’s medical clinics were also reporting a rapid increase in cases among JBS workers. The next day, Dr. Rebecca Steinke, a family medicine doctor at one of the clinics, wrote to the department’s director: “Our message is really that JBS should shut down for 2 weeks and have a solid screening plan before re-opening.”

Teresa Anderson, the regional health director, immediately drafted a letter to the governor.

But during a conference call that Sunday, Gov. Pete Ricketts made it clear that the plant, which produces nearly 1 billion pounds of beef a year and is the town’s largest employer, would not be shut down.

Since then, Nebraska has become one of the fastest-growing hot spots for the novel coronavirus in the United States, and Grand Island has led the way. Cases in the city of 50,000 people have skyrocketed from a few dozen when local health officials first reported their concerns to more than 1,200 this week as the virus spread to workers, their families and the community.

The dismissed warnings in Grand Island, documented in emails that ProPublica obtained under the state’s public records law, show how quickly the virus can spread when politicians overrule local health officials. But on a broader scale, the events unfolding in Nebraska provide an alarming case study of what may come now that President Donald Trump has used the Defense Production Act to try to ensure meat processing plants remain open, severely weakening public health officials’ leverage to stop the spread of the virus in their communities.

Ricketts spokesman Taylor Gage said the governor explained on the call with local officials that the plant would stay open because it was declared an essential industry by the federal government. Two and a half weeks later, as cases were rising among the state’s meatpacking workers, Ricketts, a Republican businessman whose father founded the brokerage TD Ameritrade, held a news conference and said he couldn’t foresee a scenario where he would tell the meatpacking plants to close because of their importance to the nation’s food supply.

“Can you imagine what would happen if people could not go to the store and get food?” he asked. “Think about how mad people were when they couldn’t get paper products.”

“Trust me,” he added, “this would cause civil unrest.”

In the last two weeks, small meatpacking towns across Nebraska have experienced outbreaks, including at a Tyson Foods beef plant in Dakota City, a Costco chicken plant in Fremont and a Smithfield Foods pork plant in Crete. With the governor vowing to keep plants open, the companies have only in recent days decided to close for deep cleanings as cases have grown to staggering levels.

In Grand Island, two hours west of Omaha, the consequences of the governor’s decision came quickly. The CHI Health St. Francis hospital, which has 16 intensive care beds, was soon overwhelmed. At one point in April, it had so many critical patients that it had to call in three different helicopter companies to airlift patients to larger hospitals in Lincoln and Omaha, said Beth Bartlett, the hospital’s vice president for patient care.

JBS workers felt the strain, too. Under pressure to keep the food supply chain flowing, some of the plant’s 3,500 workers, many hailing from Latin America, Somalia and Sudan, said they were told to report for work regardless. In a letter to the governor last week, Nebraska Appleseed, a nonprofit advocacy group, said a JBS worker had been told by his supervisor that if he tested positive, he should come to work anyway and “keep it on the DL” or he’d be fired. Some workers who’d been told to quarantine after being exposed told ProPublica this week that they were called back to work before the 14-day window recommended by the Centers for Disease Control and Prevention — even if they felt sick. One worker in the offal, or entrails, section recently fainted in the plant, they said, but was told he couldn’t go home.

Cameron Bruett, head of corporate affairs for JBS, said the company has worked in partnership with local officials to prevent the spread of the coronavirus and did not influence the governor’s decision to keep the plant open. He pointed to comments made recently by University of Nebraska Medical Center officials who toured the plant, who said JBS has put in place some “best practices,” including installing barriers on the meat cutting line, communicating new precautions in multiple languages and ensuring the proper use of masks.

Bruett said no one is forced to come to work or punished for calling in sick. “Such actions, if true, would be grotesque and a clear violation of our culture,” he said.

The emails obtained by ProPublica show that local health officials have traced 260 cases to the JBS plant. But that was nearly two weeks ago and almost certainly underestimates the total. Anderson, who directs the Central District Health Department, said she hasn’t had enough tests to do targeted testing of JBS employees and is only testing people when they’re symptomatic. In Grand Island and its surrounding county, 32 people have died from the virus. According to workers, at least one of those was a JBS employee.

Across the country, more than 10,000 COVID-19 cases have been linked to meatpacking plants, and at least three dozen workers are known to have died, a ProPublica review of news reports and government health data shows.

While cases in the worst hit urban areas like New York appear to have plateaued, the nation’s meatpacking towns have continued to see spikes. A few large outbreaks have dominated public attention, but COVID-19 cases have popped up in well over 100 plants in mostly rural communities. There the virus’s impact is magnified by the workers’ sometimes cramped living conditions, with multiple generations of immigrant and refugee families often residing together in apartments, houses and trailers.

Before Trump’s order, more than 30 plants had shut down at least briefly to increase cleaning and control the spread among their workforces. The various closures have cut beef and pork production by more than a third compared with last year, causing supply chain disruptions for some supermarkets and fast-food chains.

Some of those closures show the role public health officials have had in the actions of large meatpacking companies like JBS, which has beef, pork and poultry plants in 27 states.

In Colorado, Dr. Mark Wallace of the Weld County Department of Public Health and Environment and state health director Jill Hunsaker Ryan grew worried that that if the coronavirus spread at JBS’ Greeley plant, it would have a “devastating” effect on the community that “would quickly overwhelm the medical resources available in the hospitals.”

Unlike Nebraska, Colorado’s health officials eventually ordered the JBS plant to close. But documents obtained by ProPublica show the protracted debate that came before that decision, with JBS invoking the governor to question the formal closure order. By the time the order was issued, some public officials felt the virus had been given too big a head start.

Like Grand Island, Greeley officials were already hearing by the end of March that hospital emergency rooms were seeing a “high number of JBS employees,” according to an email Wallace sent April 1 to the plant’s occupational health director.

“Their concern, and mine, is far too many employees must be working when sick and spreading infection to others,” Wallace wrote, urging the plant to take additional safety measures.

Three days later, Wallace wrote a more detailed letter to JBS’ human resources director, Chris Gaddis, documenting the virus’s spread and threatening to shut the plant down if it didn’t screen employees and ensure they could work 6 feet apart.

But as days passed, the situation in Greeley didn’t improve.

“Want you to know my colleagues are not reassured by what I’m sharing about measures being implemented,” Wallace wrote to Gaddis. “‘The cat’s out of the bag’ is what all health care providers are saying — too many sick people already, too much spread already, etc.”

After nine days of back-and-forth, JBS agreed to close the plant and Hunsaker Ryan and Wallace issued a formal shutdown order. But negotiations seemed to stretch until the last minute, emails show.

After Hunsaker Ryan sent JBS the order on the afternoon of April 10, Gaddis appeared confused. “It is our understanding from the telephone conversation that the governor did not want this letter sent,” Gaddis wrote. “Please confirm it was properly sent.”

Bruett said the company’s impression was that the governor didn’t feel a formal order “was necessary given our voluntary decision to shut down.” But Conor Cahill, a spokesman for Gov. Jared Polis, said: “Of course the governor wanted the health order sent. The governor has been clear that JBS needs to be more transparent with their staff and the public about the situation at their plant.”

Notified of the shutdown by his staff, Greeley Mayor John Gates wrote in an email, “In my opinion, that should have happened a week ago for the health and safety of their employees.”

On Wednesday, the state announced the latest numbers on the JBS outbreak: 280 employees had tested positive for COVID-19, and seven of them had died.

The Grand Island beef plant opened in 1965 in a sugar beet farming area. In recent decades, the plant has drawn immigrants from Mexico and Central America, and more recently refugees from Somalia and Sudan. In a sign of the area’s shifting workforce, Somali residents have opened a mosque in the old El Diamante nightclub and a community center in the former Lucky 7 Saloon next to a Salvadoran restaurant named El Tazumal.

Members of those communities became among the first to hit the area’s medical clinics as the virus began to spread. By the last week in March, the Family Practice of Grand Island, where Steinke works, had opened a special respiratory clinic to handle COVID-19 patients. That week, six of the patients had come from JBS. But over three days from March 30 to April 1, the clinic saw 25 patients that carried JBS insurance, indicating they were either employees or their dependents.

Danny Lemos’ father was one of the first JBS workers to get sick from the virus in late March. The 62-year-old, who’d worked at the plant for a year, had developed a fever and a cough.

“One day, he was laying in the living room on a chair, wrapped up in a blanket, shivering,” Lemos said. “My mom takes his temperature, and he had a temperature of 105 and he was really having trouble breathing.”

His father was rushed to the hospital and put on a ventilator.

Within days, Lemos said he also started having trouble breathing and joined his father in the ICU. Lemos, 39, was put in a medically induced coma and given a 20% chance of living, he said.

Surprisingly, he said, he eventually recovered and was released from the hospital in late April. His father, Danny Lemos Sr., has been in the hospital for more than a month, most of the time on a ventilator, and is only now starting to recover.

Lemos said JBS should have taken better precautions.

“Shutting down right away, I think, probably would have helped a ton,” he said. “Do I think it would have kept everybody from getting sick? No, because those same people are still going to be out and about in the community. But just being so many people in one building, it was like a ticking time bomb.”

In an interview this week, Steinke said that it was hard to get the message across to JBS that more needed to be done.

“Even if they did not stop or shut down, if they would have put in better protections right from the start,” she said, “we would not have seen such a rapid rise in cases.”

At one point before the governor’s decision, the emails ProPublica obtained show, officials found language on the U.S. Department of Agriculture’s website that said local authorities could close a plant and the USDA would follow those decisions, potentially giving the health district some leverage.

“I guess I will send it to … HR there and maybe he will take us more seriously,” Anderson, the local health director, wrote in an email to the city administrator.

Under Trump’s executive order, that guidance has been reversed: The USDA could try to overrule local decisions if federal officials disagree.

That could pose a risk to the USDA’s own workforce of federal food inspectors, who work inside the plants to ensure the meat is safe to eat. According to the emails, some inspectors at the JBS plant also tested positive. Because inspectors sometimes monitor multiple sites, one inspector noted that she had recently worked in two other plants that have also had outbreaks, potentially spreading the virus within other plants.

“From my perspective,” temporarily closing the JBS plant “would have reduced the transmission,” Anderson said in an interview this week. “But if you shut down a plant and your 3,700 employees have nowhere to go, where are they going to go and how far is the spread going to be outside the plant vs. inside the plant? And if you end up going a month, what happens to their ability to feed their families?”

Anderson said that the “general feeling” she got from the call with the governor was that they needed to do more testing. So after the governor blocked the effort to close the plant, she continued to try to work collaboratively with JBS to encourage more testing of their employees.

In the emails, JBS officials said they were open to testing but repeatedly expressed concern about public disclosure of the results. “We want to make sure that testing is conducted in a way that does not foment fear or panic among our employees or the community,” JBS chief ethics and compliance officer Nicholas White wrote in an email to Anderson on April 15.

A week later, after the number of JBS cases was released by Anderson, Tim Schellpeper, president of the company’s U.S. beef processing operations, emailed her that he was worried about the amount of national attention it was attracting. “Have you given more thought to adding clarity/correction around this in your comments today?” he asked.

As JBS officials fretted about the optics of testing their employees, tensions within the families of the workers mounted. As the number of sick workers grew, the daughter of one worker, Miriam, said she was panicking about what would happen to her mother, who worked on the plant’s kill floor. At the end of every shift, she said, she called her mother to make sure she was okay.

“It was dreadful,” said Miriam, who asked that her last name not be used to protect her mother from retaliation. “It was just kind of living in fear waiting for the day she would have a fever. We knew it was going to happen because she’s a JBS employee. We didn’t think it was preventable anymore.”

Then, one day, she got a call from her mother, telling her that she had developed a fever and was being sent home.

“As she was changing in the locker room, she calls me and you can just hear the fear in her voice,” Miriam said.

Shortly after, her father tested positive for the virus too. Thankfully, she said, both her parents had only mild symptoms and have since recovered. But JBS and the governor should have done more, Miriam said.

“It just seemed like they were kind of careless,” she said. “I think it would have been a smart idea if not to close down the plant, to take more action to help the employees. They’re essential, but they need protection. They need to be kept safe.”

In the meantime, Ricketts has said that his approach of keeping the state “open for business” worked. And at a news conference Friday, he underscored the importance of the meatpacking industry to the state’s economy, proclaiming May as “Beef Month” in Nebraska.

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The ATP and WTA, along with the International Tennis Federation and organisers of the four Grand Slams (Tennis Australia, the Federation Francaise de Tennis, All England Club and United States Tennis Association) are planning create a 'Player Relief Programme' to provide assistance to the coronavirus-impacted players.

"With so much uncertainty around when it will be safe to restart the professional tennis tours, the international governing bodies of world tennis can confirm they are in discussions to create a Player Relief Programme to provide much-needed assistance to the players who are particularly affected during this time of the coronavirus (COVID-19) crisis," ITF said in a statement on Tuesday.

"These discussions have been progressing well and details are being finalised with an announcement expected in the near future. Already agreed is that the ATP and the WTA will administer the Player Relief Programme and all seven stakeholders will make a significant contribution," the statement added. IFT further said: "We know that for our players, as well as for so many people worldwide, there is the need for financial support for those who need it most and we look forward to finalising and sharing the further details of a plan in due course."

The London-based governing body has also announced the creation of player panels for those competing on its World Tennis Tour. "The panel will provide a forum for players to provide their input and have their say on how the tour is run and will be a further opportunity for the ITF to engage with the player community," ITF said. The men's and women's players will each elect a panel of seven current player members, who will have voting rights.

Men's players with an ATP ranking of below 350 and women's tennis players with a WTA ranking not higher than 151 will be allowed to nominate a fellow player or stand in the election.

All professional tennis activities remain suspended till July 13 due to coronavirus outbreak which has so far claimed more 1.7 lives across the world.

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20-time Grand Slam champion Roger Federer came up with a radical proposal regarding the future of international tennis. The Swiss superstar suggested a merger between men's tennis body ATP and women's governing body WTA.

Federer believes this could be the right time for a merger between ATP and WTA for the betterment of the sport. The former World No.1 also explained that he isn't asking for competitions being merged but only the governing bodies.

"Am I the only one thinking that now is the time for men's and women's tennis to be united and come together as one?" Federer wrote on his Twitter handle.

"I am not talking about merging competition on the court, but merging the two governing bodies (ATP and WTA) that oversee the men's and women's professional tours."

"It's too confusing for the fans when there are different ranking systems, different logos, different websites, different tournament categories," he wrote further.

The entire sporting calender of the world is reeling due to Covid-19 pandemic and tennis is not different. The season has been put on hold with multiple tournaments being postponed or cancelled.

The second slam of the year, French Open, has been postponed from May to September while the Wimbledon was cancelled earlier this month in the wake of coronavirus crisis. Wimbledon had only been cancelled twice before, because of World War 1 and World War 2.

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A fund for tennis players hardest hit by the coronavirus pandemic has been created, the sport's governing bodies announce, adding that they had contributed more than $6 million (5.3 million euros). In a joint statement, the ATP and WTA tours, the International Tennis Federation and the four Grand Slam tournaments -- the Australian Open, Roland-Garros, Wimbledon and the US Open -- said the Player Relief Programme will support those "who are facing unprecedented challenges due to the global impact of COVID-19".

With the tennis season suspended until at least July 13, some "800 ATP/WTA singles and doubles players" are in need of financial support, the statement continued, with eligibility for the fund determined by a player's ranking and previous prize money earnings. The fund can also be donated to via initiatives including auctions, player donations and virtual tennis games, added the governing bodies, who last month announced talks about creating the programme.

The virus has caused havoc to the calendar, with Wimbledon cancelled for the first time since World War II and the French Open postponed until the end of September. The United States Tennis Association will decide in mid-June whether or not the US Open will take place in New York. However despite the financial difficulties facing hundreds of players, the idea of a relief fund was dismissed by world number three Dominic Thiem, who said last month he would not give lower-ranked players his money.
"Quite honestly I have to say that no tennis player will be fighting to survive, even those who are much lower-ranked," Thiem said, speaking of a separate fund idea revealed by Novak Djokovic.

"None of them are going to starve ... I would rather give money to people or organisations that really need it."

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The Australian was at his exuberant best in a semi-final win over Stefanos Tsitsipas on Saturday and followed that up with a tight 7-6 (8-6), 7-6 (7-4) triumph against third seed Medvedev.

 Nick Kyrgios faces a suspension from tennis after labelling the ATP 'corrupt'. Kyrgios made the comments after his first-round US Open win over American Steve Johnson.

MIKE DICKSON IN NEW YORK: Tennis's authorities are coming under pressure from inside the locker room to take firmer action against Nick Kyrgios after his latest outbursts at the US Open.