Evidence map›Paper›PMID 18753253›Full record

ArticleJournal of the American Society of Nephrology : JASN2008

Rap1b GTPase ameliorates glucose-induced mitochondrial dysfunction.

Lin Sun, Ping Xie, Jun Wada, Naoki Kashihara, Fu-you Liu, Yanan Zhao, Deepak Kumar, Sumant S Chugh, Farhad R Danesh, Yashpal S Kanwar

Open access · greenAbstract read
In one paragraph

Article in Journal of the American Society of Nephrology : JASN, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers.

0numbers the graph read from it
0cells of the map it votes in
47citing papers in PubMed
1.8field-weighted citation impact, top 15% 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

47 citing papers in PubMed, 77 citations in OpenAlex.

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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

10 authors at 8 institutions in 4 countries.

Lin SunDepartment of Pathology, Northwestern University, Chicago, Illinois 60611, USA.
Ping Xie
Jun Wada
Naoki Kashihara
Fu-you Liu
Yanan Zhao
Deepak Kumar
Sumant S Chugh
Farhad R Danesh
Yashpal S Kanwar
Northwestern Medicine · USBaylor College of Medicine · USKawasaki Medical School · JPNorthwestern University · PHNorthwestern University · USOkayama University · JPUniversity of Alabama at Birmingham · USXiangya Hospital Central South University · CN

Funding

Pathogenesis of Diabetic NephropathyR01DK060635 · NIDDK · NORTHWESTERN UNIVERSITY AT CHICAGO · PI QUAGGIN, SUSAN E. · 2002 to 2023
$6.6M
GLOMERULAR CAPILLARY WALL: NORMAL AND PATHOLOGICR01DK028492 · NIDDK · NORTHWESTERN UNIVERSITY AT CHICAGO · PI KANWAR, YASHPAL S. · 1986 to 2008
$1.9M
GLOMERULAR CAPILLARY WALL--NORMAL AND PATHOLOGICR37DK028492 · NIDDK · NORTHWESTERN UNIVERSITY · PI KANWAR, YASHPAL S. · 1998 to 2003
$1.2M
NIDDK NIH HHS DK28492NIDDK NIH HHS DK60635NIDDK NIH HHS R01 DK028492NIDDK NIH HHS R01 DK060635NIDDK NIH HHS R37 DK028492
6 · The paper itself

Abstract

The role of tubular injury in diabetic nephropathy is relatively unknown, despite that apoptosis of tubular epithelial cells is commonly observed in human renal biopsies. The GTPase Ras-proximate-1 (Rap1b) is upregulated in the hyperglycemic state and is known to increase B-Raf, an antiapoptotic effector protein. In this study, the effects of high glucose on renal tubular apoptosis and the potential ability for Rap1b to ameliorate these effects were investigated. In the kidneys of diabetic mice, apoptotic tubular cells and dysmorphic mitochondria were observed, Bcl-2 expression was decreased, and Bax expression was increased. Total Rap1b expression was slightly increased, but its associated GTPase activity was significantly decreased. In vitro, high extracellular glucose led to decreased Bcl-2 expression, reduced Rap1b GTPase activity, and increased levels of both Bax and GTPase activating protein in a proximal tubular cell line (HK-2). These changes were accompanied by increased DNA fragmentation, decreased high molecular weight mitochondrial DNA, altered mitochondrial morphology and function, disrupted Bcl-2-Bax and Bcl-2-Rap1b interactions, and reduced cell survival. Overexpression of Rap1b partially prevents these abnormalities. Furthermore, the BH4 domain of Bcl-2 was found to be required for successful protein-protein interaction between Bcl-2 and Rap1b. In summary, these data suggest that Rap1b ameliorates glucose-induced mitochondrial dysfunction in renal tubular cells.

Indexed as

AnimalsApoptosisbcl-2-Associated X ProteinCell LineCytochromes cDiabetes Mellitus, ExperimentalDNA, MitochondrialGlucoseIn Situ Nick-End LabelingKidney TubulesMiceMice, Inbred ICRMitochondriaProto-Oncogene Proteins c-bcl-2rap GTP-Binding Proteinsbcl-2-Associated X ProteinCytochromes cDNA, MitochondrialGlucoseProto-Oncogene Proteins c-bcl-2Rap1b protein, mouserap GTP-Binding Proteins

Identifiers

PMID18753253
PMCPMC2588105
OpenAlexW2165803538

What OpenQuestion holds

Textmetadata
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 OpenQuestion graph.