Evidence map›Paper›PMID 20629086›Full record

ArticleJournal of cellular physiology2010

PRAS40 acts as a nodal regulator of high glucose-induced TORC1 activation in glomerular mesangial cell hypertrophy.

Nirmalya Dey, Nandini Ghosh-Choudhury, Falguni Das, Xiaonan Li, Balachandar Venkatesan, Jeffrey L Barnes, Balakuntalam S Kasinath, Goutam Ghosh Choudhury

Open access · greenAbstract read
In one paragraph

Article in Journal of cellular physiology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed
2.0field-weighted citation impact, top 14% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

32 citing papers in PubMed, 46 citations in OpenAlex.

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  12. PRAS40 signaling in tumor.Oncotarget · 2017
    Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 2 institutions in 1 country.

Nirmalya DeyDepartment of Medicine, University of Texas Health Science Center, San Antonio, Texas 78229-3900, USA.
Nandini Ghosh-Choudhury
Falguni Das
Xiaonan Li
Balachandar Venkatesan
Jeffrey L Barnes
Balakuntalam S Kasinath
Goutam Ghosh Choudhury
The University of Texas Health Science Center at San Antonio · USSouth Texas Veterans Health Care System · US

Funding

Mechanism of Renal Cell Injury in DiabetesR01DK050190 · NIDDK · UNIVERSITY OF TEXAS HLTH SCIENCE CENTER · PI GHOSH CHOUDHURY, GOUTAM · 2004 to 2013
$2.3M
Novel mechanisms of diabetic nephropathyR01DK077295 · NIDDK · UNIVERSITY OF TEXAS HLTH SCIENCE CENTER · PI KASINATH, BALAKUNTALAM S · 2007 to 2011
$1.3M
Redox Signaling in Osteoblast DifferentiationR01AR052425 · NIAMS · UNIVERSITY OF TEXAS HLTH SCIENCE CENTER · PI GHOSH-CHOUDHURY, NANDINI · 2005 to 2009
$1.1M
NIAMS NIH HHS R01 AR052425NIAMS NIH HHS R01 AR52425NIDDK NIH HHS R01 DK050190NIDDK NIH HHS R01 DK077295NIDDK NIH HHS R01 DK50190
6 · The paper itself

Abstract

Diabetic nephropathy manifests aberrant activation of TORC1, which senses key signals to modulate protein synthesis and renal hypertrophy. PRAS40 has recently been identified as a raptor-interacting protein and is a component and a constitutive inhibitor of TORC1. The mechanism by which high glucose stimulates TORC1 activity is not known. PRAS40 was identified in the mesangial cells in renal glomeruli and in tubulointerstitium of rat kidney. Streptozotocin-induced diabetic renal hypertrophy was associated with phosphorylation of PRAS40 in the cortex and glomeruli. In vitro, high glucose concentration increased PRAS40 phosphorylation in a PI 3 kinase- and Akt-dependent manner, resulting in dissociation of raptor-PRAS40 complex in mesangial cells. High glucose augmented the inactivating and activating phosphorylation of 4EBP-1 and S6 kinase, respectively, with concomitant induction of protein synthesis and hypertrophy. Expression of TORC1-nonphosphorylatable mutant of 4EBP-1 and dominant-negative S6 kinase significantly inhibited high glucose-induced protein synthesis and hypertrophy. PRAS40 knockdown mimicked the effect of high glucose on phosphorylation of 4EBP-1 and S6 kinase, protein synthesis, and hypertrophy. To elucidate the role of PRAS40 phosphorylation, we used phosphorylation-deficient mutant of PRAS40, which in contrast to PRAS40 knockdown inhibited phosphorylation of 4EBP-1 and S6 kinase, leading to reduced mesangial cell hypertrophy. Thus, our data identify high glucose-induced phosphorylation and inactivation of PRAS40 as a central node for mesangial cell hypertrophy in diabetic nephropathy.

Indexed as

Adaptor Proteins, Signal TransducingAnimalsCarrier ProteinsCells, CulturedEnzyme ActivationGlucoseIntracellular Signaling Peptides and ProteinsMaleMesangial CellsPhosphatidylinositol 3-KinasesPhosphoproteinsPhosphorylationProto-Oncogene Proteins c-aktRatsRats, Sprague-DawleyRibosomal Protein S6 KinasesAdaptor Proteins, Signal TransducingAkt1s1 protein, ratCarrier ProteinsEif4ebp1 protein, ratGlucoseIntracellular Signaling Peptides and ProteinsPhosphatidylinositol 3-KinasesPhosphoproteinsProto-Oncogene Proteins c-aktRibosomal Protein S6 KinasesTranscription Factors

Identifiers

PMID20629086
PMCPMC2908198
OpenAlexW2006095660

What Socratic holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.