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The cytoskeleton is a complex dynamic structure performing varied functions based on cellular requirements. The adaptability of the individual filaments in the cytoskeleton determines their ability to perform various functions within the cell. It can undergo rapid reorganization during processes like cell division or remain stable for several hours as in the interphase. The adaptability of these filaments depends on stringent regulatory mechanisms. The microfilament and microtubules of the...
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Cytoskeletal filaments are polymeric forms of smaller protein subunits. However, individual cytoskeletal filaments may easily disassemble or associate with other similar filaments to form rigid structures. Microfilaments, made of actin monomers, rely on actin-binding proteins to form bundles and create networks of individual actin filaments. Microtubules rely on microtubule-associated proteins (MAPs) to form sturdy cylindrical structures. However, the proteins involved in forming complex...
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Characterization at the Molecular Level using Robust Biochemical Approaches of a New Kinase Protein
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LIM kinases: cofilin and beyond.

Chloé Prunier1,2, Renaud Prudent3, Reuben Kapur4

  • 1Institute for Advanced Biosciences, INSERM, CNRS UMR, Université Grenoble Alpes, Grenoble, France.

Oncotarget
|April 27, 2017
PubMed
Summary

LIM kinases regulate cytoskeleton dynamics and control microtubule functions. New LIM kinase inhibitors show therapeutic potential for diseases like cancer.

Keywords:
LIM kinasescytoskeletoninhibitorsmicrotubules

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Area of Science:

  • Cell Biology
  • Molecular Signaling
  • Biochemistry

Background:

  • LIM kinases are key signaling nodes regulating cytoskeleton dynamics via cofilin phosphorylation.
  • Emerging evidence reveals LIM kinases also control microtubule dynamics, extending their known functions.
  • This dual role in actin and microtubule regulation is critical for cellular processes.

Purpose of the Study:

  • To review and analyze data supporting LIM kinases' control over microtubule dynamics.
  • To explore potential mechanisms underlying LIM kinase-mediated microtubule regulation.
  • To compare newly developed LIM kinase inhibitors for therapeutic applications.

Main Methods:

  • Literature review and data analysis of studies on LIM kinase function.
  • Examination of biochemical and cellular mechanisms of microtubule regulation by LIM kinases.
  • Comparative analysis of LIM kinase inhibitors' chemical structures, specificity, and in vitro/in vivo effects.

Main Results:

  • Substantial evidence confirms LIM kinases regulate microtubule dynamics independently of actin.
  • Multiple mechanisms are proposed for LIM kinase involvement in microtubule organization and stability.
  • Several novel LIM kinase inhibitors exhibit promising specificity and cellular effects.

Conclusions:

  • LIM kinases play a significant role in both actin and microtubule dynamics.
  • Understanding LIM kinase-microtubule interactions opens new therapeutic avenues.
  • Developed LIM kinase inhibitors offer potential treatments for cancer and other diseases.