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Dual role of nitric oxide in pancreatic β-cells

Yukiko Kurohane Kaneko1, Tomohisa Ishikawa

  • 1Department of Pharmacology, School of Pharmaceutical Sciences, University of Shizuoka, Japan.

Journal of Pharmacological Sciences
|November 29, 2013
PubMed

Insights

Nitric oxide (NO) produced by constitutive nitric oxide synthase (cNOS) in pancreatic beta cells has complex roles in insulin secretion and apoptosis. Its effects depend on concentration, influencing type 1 diabetes progression.

Area of Science:

  • Endocrinology
  • Molecular Biology
  • Diabetes Research

Background:

  • Inducible nitric oxide synthase (iNOS) is implicated in pancreatic beta-cell degeneration in type 1 diabetes.
  • Emerging evidence suggests constitutive nitric oxide synthase (cNOS) isoforms (NOS1 and NOS3) are present in pancreatic beta-cells.
  • The precise functions of cNOS-derived nitric oxide (NO) in beta-cells remain incompletely understood and are a subject of ongoing research.

Purpose of the Study:

  • To review the current understanding of nitric oxide's roles in pancreatic beta-cells.
  • To specifically focus on the contributions of constitutive nitric oxide synthase (cNOS)-derived NO.
  • To elucidate the concentration-dependent differential effects of NO on beta-cell function and survival.

Main Methods:

  • Literature review of existing studies on nitric oxide synthase (NOS) in pancreatic beta-cells.
  • Analysis of research investigating the presence and function of NOS1 and NOS3 in beta-cells.
  • Synthesis of data on the effects of varying nitric oxide concentrations on insulin secretion and apoptosis.

Main Results:

  • Nitric oxide (NO) exhibits dual regulatory roles in insulin secretion, acting both positively and negatively.
  • NO demonstrates opposing effects on beta-cell apoptosis, exhibiting both anti- and pro-apoptotic activities.
  • These diverse biological activities of NO are critically dependent on its concentration within the beta-cells.

Conclusions:

  • Constitutive nitric oxide synthase (cNOS)-derived NO plays a significant, albeit complex, role in pancreatic beta-cell physiology.
  • The concentration of NO is a key determinant of its functional outcomes, including insulin secretion and cell survival.
  • Further research is warranted to fully delineate the therapeutic potential of modulating NO signaling in diabetes.

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