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Single-channel Analysis and Calcium Imaging in the Podocytes of the Freshly Isolated Glomeruli
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Cabin1 localizes in glomerular podocyte and undergoes nuclear translocation during podocyte injury

Yueqiang Wen1, Zebin Wang1, Lingling Liu2

  • 1a Department of Nephrology , The Second Affiliated Hospital, GuangZhou Medical University , Guangzhou , China and.

Renal Failure
|August 15, 2015
PubMed
Abstract

Insights

Calcineurin binding protein 1 (Cabin1) is found in kidney podocytes. Angiotensin II (AngII) increases Cabin1 in podocyte nuclei, potentially linking it to kidney disease progression.

Area of Science:

  • Nephrology
  • Molecular Biology
  • Cell Biology

Background:

  • Podocyte injury is a key factor in progressive kidney disease and proteinuria.
  • Calcineurin binding protein 1 (Cabin1) is known to regulate transcription in immune and tumor cells, but its role in the kidney is uncharacterized.

Purpose of the Study:

  • To determine the precise localization of Cabin1 within the glomerulus.
  • To investigate the association between Cabin1 expression and podocyte injury.

Main Methods:

  • Immunofluorescence staining and Western blot were used to analyze Cabin1 localization and expression in rat kidneys.
  • Cultured mouse podocytes were stimulated with angiotensin II (AngII) with or without tacrolimus to assess Cabin1's response.

Main Results:

  • Cabin1 was primarily detected in the nuclei of glomerular cells, co-localizing with WT-1 in podocyte nuclei.
  • Western blot confirmed significant Cabin1 expression in the renal cortex.
  • AngII stimulation led to a notable increase in nuclear Cabin1 and induced cytoskeleton disruption in podocytes.

Conclusions:

  • Cabin1 is localized within glomerular podocytes.
  • Angiotensin II promotes the nuclear translocation of Cabin1 in cultured podocytes, suggesting a role in podocyte function and injury.
Keywords:
Angiotensin IICabin1calcineuringlomerulip53podocyte

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