Evidence map›Paper›PMID 22251701›Full record

ArticleThe Journal of clinical investigation2012

Crk1/2-dependent signaling is necessary for podocyte foot process spreading in mouse models of glomerular disease.

Britta George, Rakesh Verma, Abdulsalam A Soofi, Puneet Garg, Jidong Zhang, Tae-Ju Park, Laura Giardino, Larisa Ryzhova, Duncan B Johnstone, Hetty Wong and 6 more

Open access · bronzeAbstract read
In one paragraph

Article in The Journal of clinical investigation, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 69 papers.

0numbers the graph read from it
0cells of the map it votes in
69citing papers in PubMed
6.5field-weighted citation impact, top 3% 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

69 citing papers in PubMed, 111 citations in OpenAlex.

  1. Review
  2. Article
  3. The Life of a Kidney Podocyte.Acta physiologica (Oxford, England) · 2025
    Review
  4. Article
  5. Review
  6. Article
  7. Article
  8. Article
  9. Article
  10. Review
  11. Rap1 Activity Is Essential for Focal Adhesion and Slit Diaphragm Integrity.Frontiers in cell and developmental biology · 2022
    Article
  12. Article
  13. Article
  14. Review
  15. Review
  16. Review
  17. Article
  18. Review
  19. Review
  20. Article

9 more citing papers are in PubMed but not listed here.

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

16 authors at 8 institutions in 2 countries.

Britta GeorgeRenal-Electrolyte and Hypertension Division, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
Rakesh Verma
Abdulsalam A Soofi
Puneet Garg
Jidong Zhang
Tae-Ju Park
Laura Giardino
Larisa Ryzhova
Duncan B Johnstone
Hetty Wong
Deepak Nihalani
David J Salant
Steven K Hanks
Tom Curran
Maria Pia Rastaldi
Lawrence B Holzman
University of Pennsylvania · USUniversity of Michigan–Ann Arbor · USChildren's Hospital of Philadelphia · USVanderbilt University · USBoston University · USCalifornia University of Pennsylvania · USFondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico · ITUniversity of Milan · IT

Funding

Regional Pilot And Feasibility Study Grants ProgramP30DK020572 · NIDDK · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI DAVID P OLSON · 2013 to 2026
$24.3M
Slit Diaphragm and Actin DynamicsR01DK080751 · NIDDK · UNIVERSITY OF PENNSYLVANIA · PI HOLZMAN, LAWRENCE B. · 2008 to 2017
$3.6M
Myo1c Participates in Podocyte Junction Formation Through Interaction with Neph1R01DK087956 · NIDDK · UNIVERSITY OF PENNSYLVANIA · PI NIHALANI, DEEPAK · 2010 to 2018
$3.5M
MEDIATION OF ANTIBODY-INDUCED GLOMERULAR INJURYR01DK030932 · NIDDK · BOSTON UNIVERSITY MEDICAL CENTER HOSP · PI SALANT, DAVID J · 1986 to 2010
$3.4M
Role of PLA2R and anti-PLA2R in idiopathic membranous nephropathyR01DK090029 · NIDDK · BOSTON MEDICAL CENTER · PI SALANT, DAVID J · 2011 to 2015
$1.9M
Regulation of Podocyte Actin CytoskeletonK08DK081403 · NIDDK · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI GARG, PUNEET · 2008 to 2012
$829k
Antibody Mediated Glomerular InjuryR56DK030932 · NIDDK · BOSTON MEDICAL CENTER · PI SALANT, DAVID J · 2005 to 2005
$81k
NIDDK NIH HHS DK080751NIDDK NIH HHS DK30932NIDDK NIH HHS K08 DK081403NIDDK NIH HHS P30 DK020572NIDDK NIH HHS R01 DK030932NIDDK NIH HHS R01 DK080751NIDDK NIH HHS R01 DK087956NIDDK NIH HHS R01 DK090029NIDDK NIH HHS R56 DK030932
6 · The paper itself

Abstract

The morphology of healthy podocyte foot processes is necessary for maintaining the characteristics of the kidney filtration barrier. In most forms of glomerular disease, abnormal filter barrier function results when podocytes undergo foot process spreading and retraction by remodeling their cytoskeletal architecture and intercellular junctions during a process known as effacement. The cell adhesion protein nephrin is necessary for establishing the morphology of the kidney podocyte in development by transducing from the specialized podocyte intercellular junction phosphorylation-mediated signals that regulate cytoskeletal dynamics. The present studies extend our understanding of nephrin function by showing that nephrin activation in cultured podocytes induced actin dynamics necessary for lamellipodial protrusion. This process required a PI3K-, Cas-, and Crk1/2-dependent signaling mechanism distinct from the previously described nephrin-Nck1/2 pathway necessary for assembly and polymerization of actin filaments. Our present findings also support the hypothesis that mechanisms governing lamellipodial protrusion in culture are similar to those used in vivo during foot process effacement in a subset of glomerular diseases. In mice, podocyte-specific deletion of Crk1/2 prevented foot process effacement in one model of podocyte injury and attenuated foot process effacement and associated proteinuria in a delayed fashion in a second model. In humans, focal adhesion kinase and Cas phosphorylation - markers of focal adhesion complex-mediated Crk-dependent signaling - was induced in minimal change disease and membranous nephropathy, but not focal segmental glomerulosclerosis. Together, these observations suggest that activation of a Cas-Crk1/2-dependent complex is necessary for foot process effacement observed in distinct subsets of human glomerular diseases.

Indexed as

AdolescentAdultAgedAnimalsCell LineCrk-Associated Substrate ProteinFemaleFocal Adhesion Protein-Tyrosine KinasesHumansKidney DiseasesKidney GlomerulusMembrane ProteinsMiceMice, KnockoutMiddle AgedPhosphatidylinositol 3-KinasesCrk-Associated Substrate ProteinFocal Adhesion Protein-Tyrosine KinasesMembrane ProteinsnephrinPhosphatidylinositol 3-KinasesProto-Oncogene Proteins c-crkRecombinant Fusion Proteins

Identifiers

PMID22251701
PMCPMC3266791
OpenAlexW2140026339

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.