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Understanding type 2 diabetes: from genetics to epigenetics.

Gregory Alexander Raciti1,2, Michele Longo1,2, Luca Parrillo1,2

  • 1Dipartimento di Scienze Mediche Traslazionali, "Federico II" University of Naples Medical School, Naples, Italy.

Acta Diabetologica
|April 6, 2015
PubMed
Summary

Epigenetic changes, not just genetics, significantly influence type 2 diabetes development and family transmission. Lifestyle interventions can modify these epigenetic factors, offering new avenues for diabetes prediction and prevention.

Keywords:
EpigeneticsHistone modificationsMethylationMicroRNAPersonalized medicineType 2 diabetes

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Area of Science:

  • Endocrinology
  • Genetics
  • Epigenetics

Background:

  • Common genetic variations do not fully explain type 2 diabetes epidemics or familial clustering.
  • Environmental factors play a crucial role in the development and progression of type 2 diabetes.
  • Epigenetic modifications induced by environmental exposures offer a potential explanation for the disorder's complex inheritance patterns.

Purpose of the Study:

  • To review current evidence on the role of epigenetics in type 2 diabetes.
  • To explore the potential of epigenetic profiling for predicting, preventing, and treating type 2 diabetes.
  • To highlight the need for further research into the epigenetic mechanisms underlying type 2 diabetes.

Main Methods:

  • Review of clinical, epidemiological, and experimental studies on type 2 diabetes and epigenetics.
  • Examination of evidence from murine models demonstrating transgenerational epigenetic inheritance.
  • Analysis of human studies investigating lifestyle interventions and epigenetic modifications.

Main Results:

  • Epigenetic mechanisms provide a more plausible explanation for the environmental origins and familial aggregation of type 2 diabetes than common polymorphisms.
  • Environmental exposures can induce epigenetic changes that are transgenerationally transmitted, affecting insulin sensitivity and beta-cell function in offspring.
  • Lifestyle interventions can modulate the epigenome in humans, reversing environmentally induced epigenetic modifications.
  • Specific human epigenotypes predict adiposity and type 2 diabetes risk more effectively than genetic polymorphisms.
  • Epigenotypes can be identified in peripheral blood cells, suggesting potential for future diagnostic applications.

Conclusions:

  • Epigenetic factors are critical in understanding the etiology and familial aggregation of type 2 diabetes.
  • Epigenetic profiling holds significant promise for the early prediction, prevention, and personalized treatment of type 2 diabetes.
  • Further research is urgently needed to fully elucidate the role of epigenetics in type 2 diabetes management.