Provides information on kidney functions and a step-by-step guide on kidney cleansing.

Moonstone Nutrition, a Pittsburgh-based startup that has developed products to prevent kidney stone formation and promote overall kidney health, announced receipt of an investment from the Accelerator Fund II, LLC., an organization sponsored and managed by the Pittsburgh Life Sciences Greenhouse that makes early stage investments in life sciences companies located in western Pennsylvania and outside the region.  

Stevie Wonder surprised concertgoers in London on Saturday night by announcing that he will take a break from performing so that he can receive a kidney transplant this fall.

A few years ago, Nikhil Shah and Hiep Nguyen were touring the German Aerospace Center after giving a presentation about the future of surgery. One of the in-house researchers showed off a model of an implantable heart, and they thought — Why can’t we do that with a kidney?

Kidney patient to meet his Voucher Donor at New York City Marathon finish line

How far would you go for your pet? The Discovery of AIM Protein

Candidate protein biomarkers in chronic kidney disease: a proteomics study  Nature.com

The ninth in our series is on the Kidneys, ureters and bladder.
See our website for accompanying diagrams

Chronic kidney disease affects over 800 million people and can lead to kidney failure. Here are the symptoms, causes, and stages to protect your kidney health.

Location: Electronic Resource- 

Yi-Han Lin
Dec 1, 2020; 19:2030-2046
Research

Ji Eun Kim
Dec 20, 2020; 0:RA120.002159v1-mcp.RA120.002159
Research

Chiara Pavanello
Dec 1, 2020; 61:1784-1788
Patient-Oriented and Epidemiological Research

Familial LCAT deficiency (FLD) is a rare genetic disorder of HDL metabolism, caused by loss-of-function mutations in the LCAT gene and characterized by a variety of symptoms including corneal opacities and kidney failure. Renal disease represents the leading cause of morbidity and mortality in FLD cases. However, the prognosis is not known and the rate of deterioration of kidney function is variable and unpredictable from patient to patient. In this article, we present data from a follow-up of the large Italian cohort of FLD patients, who have been followed for an average of 12 years. We show that renal failure occurs at the median age of 46 years, with a median time to a second recurrence of 10 years. Additionally, we identify high plasma unesterified cholesterol level as a predicting factor for rapid deterioration of kidney function. In conclusion, this study highlights the severe consequences of FLD, underlines the need of correct early diagnosis and referral of patients to specialized centers, and highlights the urgency for effective treatments to prevent or slow renal disease in patients with LCAT deficiency.

Sepsis-induced acute kidney injury (S-AKI) is the most common complication in hospitalized and critically ill patients, highlighted by a rapid decline of kidney function occurring a few hours or days after sepsis onset. Systemic inflammation elicited by microbial infections is believed to lead to kidney damage under immunocompromised conditions. However, although AKI has been recognized as a disease with long-term sequelae, partly because of the associated higher risk of chronic kidney disease (CKD), the understanding of kidney pathophysiology at the molecular level and the global view of dynamic regulations in situ after S-AKI, including the transition to CKD, remains limited. Existing studies of S-AKI mainly focus on deriving sepsis biomarkers from body fluids. In the present study, we constructed a mid-severity septic murine model using cecal ligation and puncture (CLP), and examined the temporal changes to the kidney proteome and phosphoproteome at day 2 and day 7 after CLP surgery, corresponding to S-AKI and the transition to CKD, respectively, by employing an ultrafast and economical filter-based sample processing method combined with the label-free quantitation approach. Collectively, we identified 2,119 proteins and 2950 phosphosites through multi-proteomics analyses. Among them, we identified an array of highly promising candidate marker proteins indicative of disease onset and progression accompanied by immunoblot validations, and further denoted the pathways that are specifically responsive to S-AKI and its transition to CKD, which include regulation of cell metabolism regulation, oxidative stress, and energy consumption in the diseased kidneys. Our data can serve as an enriched resource for the identification of mechanisms and biomarkers for sepsis-induced kidney diseases.

Urinary proteomics studies have primarily focused on identifying markers of chronic kidney disease (CKD) progression. Here, we aimed to determine urinary markers of CKD renal parenchymal injury through proteomics analysis in animal kidney tissues and cells and in the urine of patients with CKD. Label-free quantitative proteomics analysis based on liquid chromatography-tandem mass spectrometry was performed on urine samples obtained from 6 normal controls and 9, 11, and 10 patients with CKD stages 1, 3, and 5, respectively, and on kidney tissue samples from a rat CKD model by 5/6 nephrectomy. Tandem mass tag-based quantitative proteomics analysis was performed for primary cultured glomerular endothelial cells (GECs) and proximal tubular epithelial cells (PTECs) before and after inducing 24-h hypoxia injury. Upon hierarchical clustering, out of 858 differentially expressed proteins (DEPs) in the urine of CKD patients, the levels of 416 decreased and 403 increased sequentially according to the disease stage, respectively. Among 2965 DEPs across 5/6 nephrectomized and sham-operated rat kidney tissues, 86 DEPs showed same expression patterns in the urine and kidney tissue. After cross-validation with two external animal proteome datasets, 38 DEPs were organized; only 10 DEPs, including serotransferrin, gelsolin, poly ADP-ribose polymerase 1, neuroblast differentiation-associated protein AHNAK, microtubule-associated protein 4, galectin-1, protein S, thymosin beta-4, myristoylated alanine-rich C-kinase substrate, and vimentin were finalized by screening human GECs and PTECs data. Among these ten potential candidates for universal CKD marker, validation analyses for protein S and galectin-1 were conducted. Galectin-1 was observed to have a significant inverse correlation with renal function as well as higher expression in glomerulus with chronic injury than protein S. This constitutes the first multi-sample proteomics study for identifying key renal-expressed proteins associated with CKD progression. The discovered proteins represent potential markers of chronic renal cell and tissue damage and candidate contributors to CKD pathophysiology.

Title: Not Enough Data to Support Kidney Disease Screening, Task Force Says
Category: Health News
Created: 8/27/2012 6:05:00 PM
Last Editorial Review: 8/28/2012 12:00:00 AM

Title: Kidney Stones May Be Tied to Later Kidney Problems
Category: Health News
Created: 8/31/2012 10:05:00 AM
Last Editorial Review: 8/31/2012 12:00:00 AM

Title: Women Increasingly Prone to Kidney Stones
Category: Health News
Created: 8/28/2013 4:35:00 PM
Last Editorial Review: 8/29/2013 12:00:00 AM

Title: Thousands of Kidneys Thrown Away by U.S. Transplant Centers
Category: Health News
Created: 8/27/2019 12:00:00 AM
Last Editorial Review: 8/28/2019 12:00:00 AM

Title: Health Tip: Preventing Kidney Stones
Category: Health News
Created: 8/30/2019 12:00:00 AM
Last Editorial Review: 8/30/2019 12:00:00 AM

Title: U.S. Kidney Transplant Outcomes Are Improving
Category: Health News
Created: 8/24/2021 12:00:00 AM
Last Editorial Review: 8/24/2021 12:00:00 AM

Title: When Removing a Big Kidney Stone, Get the Little Ones, Too
Category: Health News
Created: 8/11/2022 12:00:00 AM
Last Editorial Review: 8/11/2022 12:00:00 AM

Title: Organ From Live Donor Best When Child Needs New Kidney
Category: Health News
Created: 8/17/2022 12:00:00 AM
Last Editorial Review: 8/18/2022 12:00:00 AM

Title: Kidneys' Resilience May Depend on Your Gender, Study Finds
Category: Health News
Created: 8/22/2022 12:00:00 AM
Last Editorial Review: 8/22/2022 12:00:00 AM

Solute carrier family 6 member 19 (SLC6A19) inhibitors are being studied as therapeutic agents for phenylketonuria. In this work, a potent SLC6A19 inhibitor (RA836) elevated rat kidney uremic toxin indoxyl sulfate (IDS) levels by intensity (arbitrary unit) of 13.7 ± 7.7 compared with vehicle 0.3 ± 0.1 (P = 0.01) as determined by tissue mass spectrometry imaging analysis. We hypothesized that increased plasma and kidney levels of IDS could be caused by the simultaneous inhibition of both Slc6a19 and a kidney IDS transporter responsible for excretion of IDS into urine. To test this, we first confirmed the formation of IDS through tryptophan metabolism by feeding rats a Trp-free diet. Inhibiting Slc6a19 with RA836 led to increased IDS in these rats. Next, RA836 and its key metabolites were evaluated in vitro for inhibiting kidney transporters such as organic anion transporter (OAT)1, OAT3, and breast cancer resistance protein (BCRP). RA836 inhibits BCRP with an IC₅₀ of 0.045 μM but shows no significant inhibition of OAT1 or OAT3. Finally, RA836 analogs with either potent or no inhibition of SLC6A19 and/or BCRP were synthesized and administered to rats fed a normal diet. Plasma and kidney samples were collected to quantify IDS using liquid chromatography–mass spectrometry. Neither a SLC6A19 inactive but potent BCRP inhibitor nor a SLC6A19 active but weak BCRP inhibitor raised IDS levels, whereas compounds inhibiting both transporters caused IDS accumulation in rat plasma and kidney, supporting the hypothesis that rat Bcrp contributes to the excretion of IDS. In summary, we identified that inhibiting Slc6a19 increases IDS formation, while simultaneously inhibiting Bcrp results in IDS accumulation in the kidney and plasma.

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