Hypothesis: Causes of Type 2 Diabetes in Progeroid Werner Syndrome

نویسنده

  • Lynne S. Cox
چکیده

The premature ageing Werner syndrome (WS) is characterized by the early onset of many age related phenotypes, including graying of hair, cataracts, atherosclerosis, cancer and type 2 diabetes. Type 2 diabetes (DM2) is the loss of blood glucose homeostastis, due to insulin resistance and a failure of acute glucose-stimulated insulin secretion (GSIS) by pancreatic cells. Early compensation for insulin resistance usually occurs through increased insulin secretion consequent on increased cell mass, requiring proliferation of cells; DM2 progresses if there is failure of compensation. How loss of the WRN DNA helicase/exonuclease in WS contributes to DM2 has long been a puzzle. Loss of function mutations in WRN result in problems with DNA replication, repair and recombination, consequential genomic instability and premature onset of cellular senescence. Here, I suggest that the high prevalence of DM2 in WS is a consequence of senescence of WS cells, with islet cells undergoing highly premature failure of the hyperproliferative compensatory stage, rapidly leading to late stage diabetes. The additional contribution to DM2 progression by pro-inflammatory cytokines is

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Progeroid Syndrome and Mutation in LMNA Gene: Report of Two Cases from Iran

Two Iranian cases with very rare progeroid syndrome are reported. The first is a 24-year-old girl who has been healthy till her 13th birthday. From that time she has been suffering from a progressive generalized and multi-systemic illness. The cardinal clinical findings were growth retardation, subcutaneous fat loss, skin dryness and wrinkling, scattered focal sclerodermoid-like changes, promin...

متن کامل

Wiedmann rautenstrauch progeroid syndrome:case report

premature aging of Wiedmann rautenstrauch type is a rare syndrome,of which only nine cases has been reported up to 1994.this syndrome is characterized by cardiac, mental and physical problems such as skull and vertebral malformation which can be diagnosed from birth.in this article a 24 year old woman is reportef who was reffered to interal medicine clinic with the chief complaint of palpitatio...

متن کامل

A Novel LMNA Mutation Causes Altered Nuclear Morphology and Symptoms of Familial Partial Lipodystrophy (Dunnigan Variety) with Progeroid Features.

Dunnigan-type partial lipodystrophy (familial partial lipodystrophy, Dunnigan variety, FPLD2) can be caused by LMNA mutations. We identified a novel heterozygous LMNA mutation, P485R, in a patient referred to the International Registry of Werner Syndrome because of features consistent with that of progeroid disorder but who was wild type at the WRN locus. The novel mutation is located 2 amino a...

متن کامل

A case of metageria with a review of literature

Progeroid syndromes, one of which is metageria, are characterized by signs of premature aging with multiple systemic and skin symptoms. Here we describe an 8-year-old girl with no historyof specific underlying disease in her family, no hair growth at the scalp since she was born, and taller and thinner than her peers. We noticed diffuse subcutaneous fat atrophy. The patientwas refer...

متن کامل

Novel LMNA Gene Mutation in a Patient With Atypical Werner's Syndrome

Hutchinson-Gilford progeria syndrome (HGPS) and Werner's syndrome are representative types of progeroid syndrome. LMNA (Lamin A/C) gene mutation with atypical Werner's syndrome have recently been reported. Atypical Werner's syndrome with the severe metabolic complications, the extent of the lipodystrophy is associated with A133L mutation in the LMNA gene and these patients present with phenotyp...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2008