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Genetic Variant Impairs Glycogen Synthesis

Glycogen is stored in skeletal muscles and liver and is of central importance as a first source of energy for muscle contractions, especially during high intensity exercise. Human genetic disorders primarily affecting skeletal muscle glycogen turnover are well-recognised, but rare. In new research published in PLoS Medicine, Stephen O'Rahilly (University of Cambridge, UK) and colleagues describe the effect of a recently identified genetic variant - known as PPP1R3A FS - that affects glycogen turnover and other aspects of metabolism. Confirming that the variant is common in the UK white population (in 1.46% of the 744 adults enrolled in the study), the findings identify PPP1R3A FS as the first prevalent mutation known to impair glycogen synthesis and to decrease glycogen levels in human skeletal muscles.

In an accompanying perspective that discusses the study, Leif Groop and Marju Orho-Melander (both at Lund University, Sweden), who were not involved in the study, says that the study helps to "shed new light on the role of disturbed glycogen synthesis in disease pathogenesis."

A prevalent variant in PPP1R3A impairs glycogen synthesis and reduces muscle glycogen content in humans and mice.
Savage DB, Zhai L, Ravikumar B, Choi CS, Snaar JE
PLoS Med 5(1): e27.
Click here to view article online

About PLoS Medicine

PLoS Medicine is an open access, freely available international medical journal. It publishes original research that enhances our understanding of human health and disease, together with commentary and analysis of important global health issues.

PLoS Medicine

About the Public Library of Science

The Public Library of Science (PLoS) is a non-profit organization of scientists and physicians committed to making the world's scientific and medical literature a freely available public resource.

Public Library of Science





Varianta genetice Impairs glicogen de sinteza - Genetic Variant Impairs Glycogen Synthesis - articole medicale engleza - startsanatate