4.5 Article

Autosomal dominant diabetes associated with a novel ZYG11A mutation resulting in cell cycle arrest in beta-cells

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出版社

ELSEVIER IRELAND LTD
DOI: 10.1016/j.mce.2020.111126

关键词

Familial diabetes of adulthood; ZYG11A; Mutation; Cell cycle arrest

资金

  1. Faculty of Medicine Siriraj Hospital, Mahidol University, Thailand [R016034011]
  2. Mahidol University, Thailand [R015810001]
  3. Royal Golden Jubilee-Thailand Research Fund, Thailand (RGJ-TRF) [PHD/0260/2553]

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This study reveals a missense mutation in the ZYG11A gene associated with hyperglycemia in a family, suggesting its crucial role in beta-cell growth. The findings indicate that the ZYG11A mutation may predispose obese individuals to beta-cell failure and impact glucose homeostasis maintenance.
Diabetes is a genetically heterogeneous disease, for which we are aiming to identify causative genes. Here, we report a missense mutation (c.T1424C:p.L475P) in ZYG11A identified by exome sequencing as segregating with hyperglycemia in a Thai family with autosomal dominant diabetes. ZYG11A functions as a target recruitment subunit of an E3 ubiquitin ligase complex that plays an important role in the regulation of cell cycle. We demonstrate an increase in cells arrested at G(2)/mitotic phase among beta-cells deficient for ZYG11A or overexpressing L475P-ZYG11A, which is associated with a decreased growth rate. This is the first evidence linking a ZYG11A mutation to hyperglycemia, and suggesting ZYG11A as a cell cycle regulator required for beta-cell growth. Since most family members were either overweight or obese, but only mutation carriers developed hyperglycemia, our data also suggests the ZYG11A mutation as a genetic factor predisposing obese individuals to beta-cell failure in maintenance of glucose homeostasis.

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