With the 2019 National Cybersecurity Awareness Month (NCSAM) upon us, we decided to get the latest download on the state of cybersecurity in the automotive industry from HARMAN’s Vice President & General Manager of Automotive Cybersecurity, Asaf Atzmon....

Stamford, Connecticut – February 03, 2020 – HARMAN International, a wholly-owned subsidiary of Samsung Electronics Co., Ltd. focused on connected technologies for automotive, consumer and enterprise markets, has launched the world’s first active road...

Nouvelles lignes de basse percutantes et solos de guitare à tomber : les enceintes JBL Link Portable et Link Music viennent de sortir. Avec leur son signature 360 JBL, le Wi-Fi et le Bluetooth, Chromecast et Google Assistant intégrés, les enceintes sont aussi belles qu’intelligentes.

From Northridge, California to Garching, Germany and everywhere in between, HARMAN has been recognizing the achievements and accomplishments of women in recognition of International Women’s Day. Inspired by the campaign’s theme of #BalanceforBetter, the...

A 2016 experiment pointed towards the existence of an undiscovered force of nature. Now researchers say they've seen a second sign

It’s the ultimate scientific quest – to understand everything that there is. But the closer we get, the further away it seems. Can we ever get to grips with the true nature of reality?

In this year's mostly virtual commencement ceremonies, thousands of American graduates are adorning their mortarboards with the slogan "Gowns 4 Good" after donating their gowns to healthcare workers...

CES 2015, LAS VEGAS – HARMAN, the premium global audio, infotainment and enterprise automation group (NYSE:HAR), proudly introduce yurbuds® powered by JBL®, the number one selling sport earphone in the nation, is officially debuting yurbuds® products with JBL® Signature Sound in the US. JBL® is known industry-wide for its supreme quality, so coupling that with yurbuds® ergonomics, guaranteed never to hurt or fall out, you have a headphone like no other on the market.

Artist Ken Rinaldo encourages the bacteria on banknotes to grow and spread to explore colonialism in his touring show, Borderless Bacteria/Colonialist Cash

Ethereal photos of life’s building blocks, Earth’s toughest creature and a close-up of a gem win Olympus Global Image of the Year Life Science Light Microscopy Award regional prizes

Gowns 4 Good, a charity started by frontline physician assistant Nathaniel Moore, is asking graduates to donate their gowns to more than 77,000 frontline responders on Gowns4Good.net.

Not only are deep-sea coral ecosystems thriving on oil and gas rigs in the North Sea, their larvae may be helping repopulate damaged natural reefs

Watch a new series charting our planet from above, read all about the biggest living things, fend off space rocks for fun, plus more picks for your diary

In his new book Upheaval, polymath Jared Diamond says nations need a special kind of therapy to solve big problems like climate change, Brexit and nuclear proliferation

Rivers, lakes and forests around the world are being recognised as if they were legal persons. It sounds strange, but could it effectively protect the planet?

Ethereal photos of life’s building blocks, Earth’s toughest creature and a close-up of a gem win Olympus Global Image of the Year Life Science Light Microscopy Award regional prizes

Pandemics of the past can teach us about the current one, says John Troyer, who studies how we use technology to alter the experience of death

Gulls are often misunderstood. Many people think of them as chip-stealing pests, but that's just because they haven't spent the time to get to know them, says Madeleine Goumas

Gowns 4 Good, a charity started by frontline physician assistant Nathaniel Moore, is asking graduates to donate their gowns to more than 77,000 frontline responders on Gowns4Good.net.

Elliott vs. Argentina is one of those court cases so important and complex that only a Power Ranger, Transformers, Legos and wooden trains can possibly do it justice. (November 30, 2012)

Georgia's National Ballet, the former Soviet country's famous folk dance ensemble, started giving lessons online after the group's popular dance schools closed their doors due to the coronavirus.

It might be hard to imagine but space is getting crowded. ‘Space junk’ is becoming a dangerous hazard for orbiting satellites, and now some countries are joining forces to tackle it.

In a new report, KPMG ranks countries' autonomous vehicle (AV) readiness by analyzing how policymakers perform on four pillars: policy and legislation, technology and innovation, infrastructure, and consumer acceptance. The top rankings? The...

How much of our make-up is predetermined by our genes, and how much by our environment? The truth is that we're asking entirely the wrong question

It’s the ultimate scientific quest – to understand everything that there is. But the closer we get, the further away it seems. Can we ever get to grips with the true nature of reality?

Title: 1 in 4 Toddlers Improperly Vaccinated
Category: Health News
Created: 4/30/2008 12:00:00 AM
Last Editorial Review: 4/30/2008 12:00:00 AM

Title: Prenatal Pesticide Exposure May Harm Kids' Brains
Category: Health News
Created: 5/1/2012 11:01:00 AM
Last Editorial Review: 5/1/2012 12:00:00 AM

Title: Researchers Rejuvenate Blood-Forming Stem Cells in Mice
Category: Health News
Created: 5/3/2012 2:05:00 PM
Last Editorial Review: 5/4/2012 12:00:00 AM

Title: Companies to Donate Prosthetic Legs to Boston Bombing Victims in Need
Category: Health News
Created: 4/30/2013 8:35:00 PM
Last Editorial Review: 5/1/2013 12:00:00 AM

Title: Kids' Happiness Doesn't Depend on 2 Natural Parents, Says Study
Category: Health News
Created: 4/25/2014 2:35:00 PM
Last Editorial Review: 4/28/2014 12:00:00 AM

Title: Drug-Related HIV Outbreak Spurs Nationwide Alert
Category: Health News
Created: 4/24/2015 12:00:00 AM
Last Editorial Review: 4/27/2015 12:00:00 AM

Title: Company to Destroy 265 Tons of Ice Cream Over Listeria Contamination
Category: Health News
Created: 4/28/2015 12:00:00 AM
Last Editorial Review: 4/29/2015 12:00:00 AM

Title: Microneedle Patch Might Boost Global Measles Vaccination Rates
Category: Health News
Created: 4/28/2015 12:00:00 AM
Last Editorial Review: 4/29/2015 12:00:00 AM

Title: High Measles Rates Mean Kids, Adults Need Proper Vaccination: CDC
Category: Health News
Created: 4/29/2019 12:00:00 AM
Last Editorial Review: 4/30/2019 12:00:00 AM

Title: Burger King to Sell 'Veggie' Whopper Nationwide
Category: Health News
Created: 4/29/2019 12:00:00 AM
Last Editorial Review: 4/30/2019 12:00:00 AM

Title: New Saliva-Based COVID-19 Test an Easier Alternative
Category: Health News
Created: 4/27/2020 12:00:00 AM
Last Editorial Review: 4/28/2020 12:00:00 AM

Title: National Coronavirus Testing Strategy Announced as States Reopen
Category: Health News
Created: 4/28/2020 12:00:00 AM
Last Editorial Review: 4/28/2020 12:00:00 AM

Title: Pain Is a Growing Threat to the Nation's Surgeons, New Research Reveals
Category: Health News
Created: 4/1/2020 12:00:00 AM
Last Editorial Review: 4/2/2020 12:00:00 AM

Title: AHA News: Is This Nature's Healthier Meat Replacement?
Category: Health News
Created: 3/27/2020 12:00:00 AM
Last Editorial Review: 3/30/2020 12:00:00 AM

Title: AHA News: Most of the Nation's Teens Aren't Getting Enough Exercise
Category: Health News
Created: 4/9/2020 12:00:00 AM
Last Editorial Review: 4/10/2020 12:00:00 AM

Title: 8 Natural Remedies for Erectile Dysfunction (ED)
Category: Doctor's & Expert's views on Symptoms
Created: 5/27/2000 12:00:00 AM
Last Editorial Review: 12/13/2019 12:00:00 AM

Title: High-Tech Prosthetic Arm Melds With Patient's Anatomy
Category: Health News
Created: 4/30/2020 12:00:00 AM
Last Editorial Review: 4/30/2020 12:00:00 AM

ABSTRACT

The cell cycle is a critical component of cellular proliferation, differentiation, and response to stress, yet its role in the regulation of intracellular symbioses is not well understood. To explore host-symbiont cell cycle coordination in a marine symbiosis, we employed a model for coral-dinoflagellate associations: the tropical sea anemone Aiptasia (Exaiptasia pallida) and its native microalgal photosymbionts (Breviolum minutum and Breviolum psygmophilum). Using fluorescent labeling and spatial point-pattern image analyses to characterize cell population distributions in both partners, we developed protocols that are tailored to the three-dimensional cellular landscape of a symbiotic sea anemone tentacle. Introducing cultured symbiont cells to symbiont-free adult hosts increased overall host cell proliferation rates. The acceleration occurred predominantly in the symbiont-containing gastrodermis near clusters of symbionts but was also observed in symbiont-free epidermal tissue layers, indicating that the presence of symbionts contributes to elevated proliferation rates in the entire host during colonization. Symbiont cell cycle progression differed between cultured algae and those residing within hosts; the endosymbiotic state resulted in increased S-phase but decreased G₂/M-phase symbiont populations. These phenotypes and the deceleration of cell cycle progression varied with symbiont identity and host nutritional status. These results demonstrate that host and symbiont cells have substantial and species-specific effects on the proliferation rates of their mutualistic partners. This is the first empirical evidence to support species-specific regulation of the symbiont cell cycle within a single cnidarian-dinoflagellate association; similar regulatory mechanisms likely govern interpartner coordination in other coral-algal symbioses and shape their ecophysiological responses to a changing climate.

IMPORTANCE Biomass regulation is critical to the overall health of cnidarian-dinoflagellate symbioses. Despite the central role of the cell cycle in the growth and proliferation of cnidarian host cells and dinoflagellate symbionts, there are few studies that have examined the potential for host-symbiont coregulation. This study provides evidence for the acceleration of host cell proliferation when in local proximity to clusters of symbionts within cnidarian tentacles. The findings suggest that symbionts augment the cell cycle of not only their enveloping host cells but also neighboring cells in the epidermis and gastrodermis. This provides a possible mechanism for rapid colonization of cnidarian tissues. In addition, the cell cycles of symbionts differed depending on nutritional regime, symbiotic state, and species identity. The responses of cell cycle profiles to these different factors implicate a role for species-specific regulation of symbiont cell cycles within host cnidarian tissues.

ABSTRACT

The nonsense-mediated decay (NMD) pathway presents a challenge for RNA viruses with termination codons that precede extended 3' untranslated regions (UTRs). The umbravirus Pea enation mosaic virus 2 (PEMV2) is a nonsegmented, positive-sense RNA virus with an unusually long 3' UTR that is susceptible to NMD. To establish a systemic infection, the PEMV2 long-distance movement protein p26 was previously shown to both stabilize viral RNAs and bind them for transport through the plant’s vascular system. The current study demonstrated that p26 protects both viral and nonviral messenger RNAs from NMD. Although p26 localizes to both the cytoplasm and nucleolus, p26 exerts its anti-NMD effects exclusively in the cytoplasm independently of long-distance movement. Using a transcriptome-wide approach in the model plant Nicotiana benthamiana, p26 protected a subset of cellular NMD target transcripts, particularly those containing long, structured, GC-rich 3' UTRs. Furthermore, transcriptome sequencing (RNA-seq) revealed that the NMD pathway is highly dysfunctional during PEMV2 infection, with 1,820 (48%) of NMD targets increasing in abundance. Widespread changes in the host transcriptome are common during plant RNA virus infections, and these results suggest that, in at least some instances, virus-mediated NMD inhibition may be a major contributing factor.

IMPORTANCE Nonsense-mediated decay (NMD) represents an RNA regulatory pathway that degrades both natural and faulty messenger RNAs with long 3' untranslated regions. NMD targets diverse families of RNA viruses, requiring that viruses counteract the NMD pathway for successful amplification in host cells. A protein required for long-distance movement of Pea enation mosaic virus 2 (PEMV2) is shown to also protect both viral and host mRNAs from NMD. RNA-seq analyses of the Nicotiana benthamiana transcriptome revealed that PEMV2 infection significantly impairs the host NMD pathway. RNA viruses routinely induce large-scale changes in host gene expression, and, like PEMV2, may use NMD inhibition to alter the host transcriptome in an effort to increase virus amplification.

ABSTRACT

Microbes affect vertebrates on timescales from daily to evolutionary, and the cumulative effect of these interactions is immense. However, how microbiomes compare across (host) species is poorly understood, as most studies focus on relatively few species. A recent mBio article by S. J. Song, J. G. Sanders, F. Delsuc, J. Metcalf, et al. (mBio 11:e02901-19, 2019, https://doi.org/10.1128/mBio.02901-19) expands our collective understanding of the vertebrate microbiome by analyzing ~900 species. They demonstrate that patterns within mammals contrast with those within birds. Their results suggest many hypotheses about the role of host ecology and evolution on microbiome variation. Bats, the only volant mammals, appear to contradict many of the general mammal microbiome trends, in some ways resembling birds. What role has powered flight, and the evolution thereof, played in microbiome structure and function? Comparative methods, mechanistic hypotheses, and theory will elucidate this exciting question (and others) that we can ask using Song, Sanders et al.’s data and results.

ABSTRACT

Bacillus subtilis contains two known cyclic di-GMP (c-di-GMP)-dependent receptors, YdaK and DgrA, as well as three diguanylate cyclases (DGCs): soluble DgcP and membrane-integral DgcK and DgcW. DgrA regulates motility, while YdaK is responsible for the formation of a putative exopolysaccharide, dependent on the activity of DgcK. Using single-molecule tracking, we show that a majority of DgcK molecules are statically positioned in the cell membrane but significantly less so in the absence of YdaK but more so upon overproduction of YdaK. The soluble domains of DgcK and of YdaK show a direct interaction in vitro, which depends on an intact I-site within the degenerated GGDEF domain of YdaK. These experiments suggest a direct handover of a second messenger at a single subcellular site. Interestingly, all three DGC proteins contribute toward downregulation of motility via the PilZ protein DgrA. Deletion of dgrA also affects the mobility of DgcK within the membrane and also that of DgcP, which arrests less often at the membrane in the absence of DgrA. Both, DgcK and DgcP interact with DgrA in vitro, showing that divergent as well as convergent direct connections exist between cyclases and their effector proteins. Automated determination of molecule numbers in live cells revealed that DgcK and DgcP are present at very low copy numbers of 6 or 25 per cell, respectively, such that for DgcK, a part of the cell population does not contain any DgcK molecule, rendering signaling via c-di-GMP extremely efficient.

IMPORTANCE Second messengers are free to diffuse through the cells and to activate all responsive elements. Cyclic di-GMP (c-di-GMP) signaling plays an important role in the determination of the life style transition between motility and sessility/biofilm formation but involves numerous distinct synthetases (diguanylate cyclases [DGCs]) or receptor pathways that appear to act in an independent manner. Using Bacillus subtilis as a model organism, we show that for two c-di-GMP pathways, DGCs and receptor molecules operate via direct interactions, where a synthesized dinucleotide appears to be directly used for the protein-protein interaction. We show that very few DGC molecules exist within cells; in the case of exopolysaccharide (EPS) formation via membrane protein DgcK, the DGC molecules act at a single site, setting up a single signaling pool within the cell membrane. Using single-molecule tracking, we show that the soluble DGC DgcP arrests at the cell membrane, interacting with its receptor, DgrA, which slows down motility. DgrA also directly binds to DgcK, showing that divergent as well as convergent modules exist in B. subtilis. Thus, local-pool signal transduction operates extremely efficiently and specifically.