Related Experiment Video

Updated: May 17, 2026

An Adipocyte Cell Culture Model to Study the Impact of Protein and Micro-RNA Modulation on Adipocyte Function
09:20

An Adipocyte Cell Culture Model to Study the Impact of Protein and Micro-RNA Modulation on Adipocyte Function

Published on: May 4, 2021

TRPM channels phosphorylation as a potential bridge between old signals and novel regulatory mechanisms of insulin

Carlos Manlio Diaz-Garcia1, Carmen Sanchez-Soto, Marcia Hiriart

  • 1Instituto de Fisiologia Celular, Universidad Nacional Autonoma de Mexico. Division de Neurociencias, Departamento de Neurodesarrollo y Fisiologia, Mexico. cmanlio@email.ifc.unam.mx

Current Diabetes Reviews
|October 25, 2012
PubMed

Insights

Protein kinases regulate insulin secretion by phosphorylating Transient Receptor Potential Melastatin (TRPM) channels in pancreatic beta cells. This review explores these phosphorylation pathways and their impact on insulin release.

Area of Science:

  • Endocrinology
  • Molecular Biology
  • Cell Physiology

Background:

  • Transient Receptor Potential (TRP) channels, particularly the TRPM family, are crucial for insulin secretion.
  • Protein kinases modulate signaling cascades involving neurotransmitters, incretins, and hormones in pancreatic beta cells.
  • The interplay between protein kinases and TRPM channels influences beta-cell excitability.

Purpose of the Study:

  • To review existing evidence on the phosphorylation of TRPM channels in pancreatic beta cells.
  • To discuss the implications of TRPM channel phosphorylation for insulin secretion regulation.

Main Methods:

  • Literature review of studies on TRPM channels and protein kinases in beta cells.
  • Analysis of data from heterologous expression systems and native tissues.
  • Synthesis of current knowledge on signaling pathways.

Main Results:

  • TRPM channels are confirmed substrates for various protein kinases within beta cells.
  • Phosphorylation significantly impacts the function and regulation of TRPM channels.
  • These interactions offer insights into novel regulatory mechanisms of beta-cell function.

Conclusions:

  • Phosphorylation of TRPM channels by protein kinases is a key regulatory mechanism for insulin secretion.
  • Understanding these pathways can lead to new therapeutic strategies for diabetes.
  • Further research is needed to fully elucidate the complex signaling networks involved.

More Related Videos

A Simple and Inexpensive Method for Determining Cold Sensitivity and Adaptation in Mice08:35

A Simple and Inexpensive Method for Determining Cold Sensitivity and Adaptation in Mice

Published on: March 17, 2015

Related Concept Videos

Insulin: The Receptor and Signaling Pathways01:28

Insulin: The Receptor and Signaling Pathways

Insulin action is mediated through a receptor tyrosine kinase, akin to the IGF-1 receptor. The number of receptors per cell varies significantly, from 40 on erythrocytes to 300,000 on adipocytes and hepatocytes. The insulin receptor consists of linked α/β subunit dimers, forming a heterotetramer glycoprotein with two extracellular α subunits and two β subunits spanning the membrane. The α subunits inhibit the inherent tyrosine kinase activity of the β subunits, but this inhibition is released...
PI3K/mTOR/AKT Signaling Pathway01:22

PI3K/mTOR/AKT Signaling Pathway

The mammalian target of rapamycin  (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1  (mTORC1) and mTOR complex 2  (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast,  mTORC2 consists of a rapamycin-insensitive companion...
cAMP-dependent Protein Kinase Pathways01:25

cAMP-dependent Protein Kinase Pathways

Cyclic Adenosine Monophosphate (cAMP) is an essential second messenger that activates protein kinase A (PKA) and regulates various biological processes. A single epinephrine molecule binds to GPCR and activates several heterotrimeric G proteins, each stimulating multiple adenylyl cyclase, amplifying the signal, and synthesizing large numbers of cAMP molecules. Small changes in cAMP concentration affect PKA activity. The binding of four cAMP molecules induces a conformational change in PKA,...
Interactions Between Signaling Pathways01:19

Interactions Between Signaling Pathways

Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
IP3/DAG Signaling Pathway01:11

IP3/DAG Signaling Pathway

Membrane lipids such as phosphatidylinositol (PI) are precursors for several membrane-bound and soluble second messengers. Specific kinases phosphorylate PI and produce phosphorylated inositol phospholipids. One such inositol phospholipids are the  phosphatidylinositol-4,5 bisphosphate [PI(4,5)P2], present in the inner half of the lipid bilayer. Upon ligand binding, GPCR stimulates Gq proteins to turn on phospholipase Cꞵ. Activated phospholipase Cꞵ cleaves PI(4,5)P2 and produces two-second...
Receptor Tyrosine Kinases01:26

Receptor Tyrosine Kinases

Receptor tyrosine kinases or RTKs are membrane-bound receptors that phosphorylate specific tyrosine on protein substrates. RTKs regulate cellular growth, differentiation, survival, and migration. They contain an extracellular ligand binding domain, a transmembrane domain, and a cytosolic tail with intrinsic kinase activity. Several extracellular signaling molecules activate RTKs in one or more ways and relay the signal downstream. Ligands such as platelet-derived growth factor (PDGF) or...