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Related Concept Videos

Actin Filament Depolymerization01:19

Actin Filament Depolymerization

Actin filaments (F-actin) are composed of actin subunits. The dissociation of actin monomers can occur from either end of F-actin. The rate of dissociation is faster from the minus-end or the pointed end, where the actin subunits exist with a bound ADP, together known as ADP-actin. The depolymerization of F-actin is aided by proteins, including the actin-depolymerizing factor (ADF) and cofilin family of proteins, gelsolin, and glia maturation factor (GMF).
In F-actin, the ADF/cofilin proteins...

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Related Experiment Video

Updated: Jun 24, 2026

Isolation of Human Endometrial Stromal Cells for In Vitro Decidualization
14:55

Isolation of Human Endometrial Stromal Cells for In Vitro Decidualization

Published on: September 1, 2018

Manipulating actin dynamics affects human in vitro decidualization.

Ivanna Ihnatovych1, Mark Livak, Jennifer Reed

  • 1Department of Obstetrics and Gynecology, University of Illinois at Chicago, Chicago, Illinois 60612-7313, USA.

Biology of Reproduction
|April 3, 2009
PubMed
Summary
This summary is machine-generated.

Stabilizing actin filaments inhibits decidualization, a crucial step in pregnancy. Nuclear translocation of cofilin protein is a key indicator of this process in primates.

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Area of Science:

  • Reproductive biology
  • Cellular and molecular biology
  • Biochemistry

Background:

  • Decidualization, the differentiation of uterine stromal fibroblasts into decidual cells, is essential for pregnancy establishment.
  • This process involves significant actin cytoskeleton remodeling, influenced by actin dynamics and myosin light chain phosphorylation.

Purpose of the Study:

  • To investigate the impact of altered actin dynamics on decidualization in human uterine fibroblasts (HuF).
  • To identify the role of the actin-binding protein cofilin in the decidualization process.

Main Methods:

  • Human uterine fibroblasts (HuF) were treated with actin-modulating drugs (jasplakinolide, latrunculin B) and decidualization stimuli (interleukin-1beta [IL1B], steroid hormones [SHs], cAMP).
  • Actin dynamics (G-actin:F-actin ratio) and cofilin localization were analyzed using biochemical and imaging techniques.
  • Experiments were extended to primary baboon uterine fibroblasts.

Main Results:

  • Jasplakinolide and latrunculin B inhibited decidualization marker synthesis.
  • Jasplakinolide disrupted the G-actin:F-actin ratio and prevented cAMP-induced decidualization.
  • Cofilin translocated from the cytosol to the nucleus in response to decidualization stimuli, a phenomenon observed in both human and baboon fibroblasts.

Conclusions:

  • Altered actin dynamics, specifically F-actin stabilization, negatively impacts primate decidualization.
  • Nuclear translocation of cofilin is a significant feature of the decidualization process in primates.