Related Experiment Video

Updated: Aug 10, 2026

Setting-up an In Vitro Model of Rat Blood-brain Barrier (BBB): A Focus on BBB Impermeability and Receptor-mediated Transport
16:26

Setting-up an In Vitro Model of Rat Blood-brain Barrier (BBB): A Focus on BBB Impermeability and Receptor-mediated Transport

Published on: June 28, 2014

Interleukin-1beta is an autocrine growth factor of rat glomerular epithelial cells in culture

F Tateyama1, H Yamabe, H Osawa

  • 1Second Department of Internal Medicine, Hirosaki University School of Medicine, 5 Zaifu-cho, Hirosaki, 036-8562, Japan.

Nephrology, Dialysis, Transplantation : Official Publication of the European Dialysis and Transplant Association - European Renal Association
|June 8, 2001
PubMed

Insights

Interleukin-1beta (IL-1beta) acts as an autocrine growth factor for glomerular epithelial cells (GEC), promoting their proliferation. This finding is crucial for understanding GEC regulation in kidney diseases.

Area of Science:

  • Nephrology
  • Cell Biology
  • Immunology

Background:

  • Glomerular epithelial cell (GEC) proliferation is a hallmark of crescentic glomerulonephritis.
  • The regulatory mechanisms of GEC proliferation remain incompletely understood.
  • The role of interleukin-1beta (IL-1beta) in GEC proliferation was previously unknown.

Purpose of the Study:

  • To investigate whether cultured rat GEC produce IL-1beta.
  • To determine the effect of IL-1beta on GEC proliferation.
  • To elucidate the role of IL-1beta in GEC growth regulation.

Main Methods:

  • Cultured rat GEC proliferation assessed via colorimetric assay.
  • IL-1beta in culture supernatants measured by ELISA.
  • IL-1beta mRNA expression analyzed by RT-PCR.

Main Results:

  • IL-1beta demonstrated a mitogenic effect on GEC.
  • GEC proliferation was inhibited by anti-IL-1beta neutralizing antibody.
  • GEC were confirmed to produce IL-1beta and its mRNA.

Conclusions:

  • IL-1beta functions as an autocrine growth factor for GEC.
  • IL-1beta plays a significant role in regulating GEC proliferation.
  • These findings offer insights into GEC behavior in kidney disease pathogenesis.
Abstract

More Related Videos

An Efficient Sieving Method to Isolate Intact Glomeruli from Adult Rat Kidney10:14

An Efficient Sieving Method to Isolate Intact Glomeruli from Adult Rat Kidney

Published on: November 1, 2018

Glomerular Outgrowth as an Ex Vivo Assay to Analyze Pathways Involved in Parietal Epithelial Cell Activation06:39

Glomerular Outgrowth as an Ex Vivo Assay to Analyze Pathways Involved in Parietal Epithelial Cell Activation

Published on: August 19, 2020

Related Concept Videos

Autocrine Signaling01:01

Autocrine Signaling

Autocrine signaling is one of the many signaling mechanisms that function inside multicellular organisms to carry out intercellular communication. In this type of signaling mechanism, the same cell that secretes an extracellular signaling molecule also expresses the receptors to bind and respond to that signaling molecule.
Autocrine Signaling in Macrophages
Under normal physiological conditions, autocrine signaling is essential for maintaining homeostasis. This process is well characterized in...
Regulation of Angiogenesis and Blood Supply01:24

Regulation of Angiogenesis and Blood Supply

Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits.  Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl hydroxylase and factor...
TGF - β Signaling Pathway01:16

TGF - β Signaling Pathway

The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors are of three kinds RI, RII, and RIII. The RI...
Intracellular Signaling Affects Focal Adhesions01:17

Intracellular Signaling Affects Focal Adhesions

Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
Some...