Expression of a Novel Stress-inducible Protein, Sestrin 2, in Rat Glomerular Parietal Epithelial Cells.

Expression of a Novel Stress-inducible Protein, Sestrin 2, in Rat Glomerular Parietal Epithelial Cells. Am J Physiol Renal Physiol. 2014 Jul 23; Authors: Hamatani H, Hiromura K, Sakairi T, Takahashi S, Watanabe M, Maeshima A, Ohse T, Pippin JW, Shankland SJ, Nojima Y Abstract Sestrin 2, initially identified as a p53 target protein, accumulates in cells exposed to stress and inhibits mammalian target of rapamycin (mTOR) signaling. In normal rat kidneys, sestrin 2 was selectively expressed in the PECs, identified by the marker PGP9.5. In adriamycin nephropathy, sestrin 2 expression decreased in PECs on day 14, together with increased expression of phosphorylated S6 ribosomal protein (P-S6RP), a downstream target of mTOR. Sestrin 2 expression was markedly decreased on day 42, coinciding with glomerulosclerosis and severe periglomerular fibrosis. In puromycin aminonucleoside nephropathy, decreased sestrin 2 expression, increased P-S6RP expression, and periglomerular fibrosis were observed on day 9, when massive proteinuria developed. These changes were transient and nearly normalized by day 28. In crescentic glomerulonephritis, sestrin 2 expression was not detected in cellular crescents, whereas P-S6RP increased. In conditionally immortalized cultured PECs, the forced downregulation of sestrin 2 by shRNA resulted in increased expression of P-S6RP, and increased apoptosis. These data suggest that sestrin 2 is involved in PEC homeostasis by regulating the acti...
Source: Am J Physiol Renal P... - Category: Urology & Nephrology Authors: Tags: Am J Physiol Renal Physiol Source Type: research

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ConclusionFew case reports have described histological findings of proteinase 3-antineutrophil cytoplasmic antibody-positive renal injury complicated with infective endocarditis. We believe that an accumulation of histological findings and treatments is mandatory for establishment of optimal management for proteinase 3-antineutrophil cytoplasmic antibody-positive renal injury complicated with infective endocarditis.
Source: Journal of Medical Case Reports - Category: General Medicine Source Type: research
CONCLUSIONS: NDRD is common in DM patients (39%), being primary glomerulonephritis the most frequent ethology. The absence of retinopathy and the presence of microhematuria are highly suggestive of NDRD. The use of our predictive model could facilitate the indication of performing a renal biopsy in DM patients. PMID: 31761446 [PubMed - as supplied by publisher]
Source: Nefrologia : publicacion oficial de la Sociedad Espanola Nefrologia - Category: Urology & Nephrology Tags: Nefrologia Source Type: research
A 10-year-old previously healthy boy, hailing from an Indian village had a history of hematuria, proteinuria, and generalized swelling for 3  months. This was diagnosed as crescentic glomerulonephritis on renal biopsy, and the patient was started on steroids. He presented with hypotensive shock and respiratory distress after a massive episode of hemoptysis following recurrent episodes of hemoptysis of small amounts for a month prior to this episode. Evaluation for causes of recurrent hemoptysis such as tuberculosis and pulmonary vasculitis were inconclusive.
Source: The Journal of Pediatrics - Category: Pediatrics Authors: Tags: Insights and Images Source Type: research
Conclusions: There was no statistical significant association between any of the studied heavy metals and CKD, although there was a significant burden of heavy metals in the studied subjects.
Source: Indian Journal of Nephrology - Category: Urology & Nephrology Authors: Source Type: research
Abstract Glomerulonephritis (GN) refers to a group of renal diseases affecting the glomeruli due to the damage mediated by immunological mechanisms. A large proportion of the disease manifestations are caused by disturbances in the complement system. They can be due to genetic errors, autoimmunity, microbes or abnormal immunoglobulins, like modified IgA or paraproteins. The common denominator in most of the problems is an overactive or misdirected alternative pathway complement activation. An assessment of kidney function, amount of proteinuria and hematuria are crucial elements to evaluate, when glomerulonephriti...
Source: Seminars in Immunology - Category: Allergy & Immunology Authors: Tags: Semin Immunol Source Type: research
Membranous-like glomerulopathy with masked IgG kappa deposits (MGMID) is a recently described pattern of glomerulonephritis with a unique histopathology. The pattern is characterized by subepithelial and/or mesangial immune deposits that are “masked”, to immunoglobulin staining by routine immunofluorescence but strongly stain for IgG and kappa light chain after protease digestion. Patients with this pattern of glomerulonephritis are most commonly young females presenting with proteinuria and a vague history of autoimmune disease suc h as low titer antinuclear antibodies.
Source: Kidney International - Category: Urology & Nephrology Authors: Tags: Clinical Investigation Source Type: research
Purpose of review This review focuses on acute kidney injury (AKI) associated with glomerular diseases and specifically the mechanisms of development of AKI in the wide spectrum of glomerulopathies. Recent findings The immune system and the kidneys are closely linked. In healthy individuals, the kidneys contribute to immune homeostasis, whereas components of the immune system mediate many acute forms of kidney disease. Both crescentic and noncrescentic forms of acute glomerulonephritis can present as AKI. The diagnosis of glomerular diseases underlying AKI requires a high degree of suspicion coupled with an algorithmi...
Source: Current Opinion in Critical Care - Category: Nursing Tags: RENAL SYSTEM: Edited by Mitchell H. Rosner Source Type: research
Rationale: Bevacizumab—an inhibitor of vascular endothelial growth factor—is effective against various advanced cancers. However, it is associated with the development of hypertension and high-grade proteinuria during thrombotic microangiopathy of the kidney. In addition, there are several reports of immunoglobulin A deposition in the glomeruli, but the etiology is unclear. Patient concerns: A 67-year-old Japanese man with metastatic rectal cancer underwent low anterior rectal resection, followed by treatment with bevacizumab and SOX (S-1 plus oxaliplatin). Six months later, the patient developed hematuria...
Source: Medicine - Category: Internal Medicine Tags: Research Article: Clinical Case Report Source Type: research
CONCLUSIONS: Ser interfered with albumin internalization through the caveolae into GEnCs and podocytes and reduced albuminuria. Dynamin inhibitors may serve as a novel therapeutic option for reducing albuminuria in glomerulonephritis. PMID: 31655808 [PubMed - as supplied by publisher]
Source: American Journal of Nephrology - Category: Urology & Nephrology Authors: Tags: Am J Nephrol Source Type: research
Authors: special issue: “Focus on pediatric nephrology”, Colavita L, Salpietro C, Cuppari C, Sallemi A, Di Benedetto V, Concolino D, Marseglia L, D'Angelo G, Gitto E, Betta P, Fede C, Conti G, Chimenz R Abstract Nephrotic Syndrome (NS) is a rare diseases (around 2-7 cases per 100.000 children per year) characterized by proteinuria ≥50 mg/kg/day (or ≥40 mg/m2/h) or a proteinuria/creatininuria ratio>2 (mg/mg); hypoalbuminaemia less than 25 g/l and edema. The protein leakage, with the consequent hypoalbunaemia and edema, due to podocyte alterations may be caused by genetic diseases, immunological ...
Source: Journal of Biological Regulators and Homeostatic Agents - Category: Biomedical Science Tags: J Biol Regul Homeost Agents Source Type: research
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