一項最新的研究發(fā)現(xiàn),有一類不正?;?,總比其他健康人群,更有普遍的存在與Ⅱ型糖尿病的患者身上,。
Ⅱ型糖尿病患者已知存在高癌癥風險,,特別是像淋巴瘤和白血病這樣的血癌。由英國倫敦帝國理工大學和法國法國科學研究中心帶領的科學家們,,最近表示:一種稱為“克隆馬賽克事件(CMEs)”的基因,,可能可以解釋這一人群疾病的部分問題。
CMEs缺陷會導致某些細胞大量的DNA,,出現(xiàn)額外拷貝或拷貝丟失,。這些情況在年輕人中很少出現(xiàn),但是研究發(fā)現(xiàn)在老年中卻更普遍地顯現(xiàn),。大至到70歲以上后,,大約每50人中就有1個人出現(xiàn)這些突變。已在去年發(fā)表的研究表明,,存在CMEs的患者,,出現(xiàn)血癌的幾率要高10倍。
此次研究發(fā)表在《自然遺傳學》上,,研究人員從來自歐洲遺傳學研究的7,,437名受試者中,觀察了血液樣本中的CMEs,,參與者中的2,,208人患有Ⅱ型糖尿病。他們發(fā)現(xiàn),,CMEs在Ⅱ型糖尿病人身上比健康人群高4倍,。
“Ⅱ型糖尿病是一種加速老化的疾病,,所以我們想知道它是否可使人們更易發(fā)生遺傳缺陷,從而加速老化,,”來自帝國理工公共健康學院的PhilippeFroguel教授表示,。“這一發(fā)現(xiàn)可以部分解釋,為什么Ⅱ型糖尿病患者更容易出現(xiàn)血癌的情況,。它可能用于醫(yī)生對Ⅱ型糖尿病患者進行CMEs化驗,,以確認他們是否具有癌癥的高風險。
這些病人在早期觀察到白血病的征兆,,并且可以進行溫和的化學治療,。”研究人員也發(fā)現(xiàn),出現(xiàn)CMEs的糖尿病病人伴有高風險的并發(fā)癥,,如腎衰竭,、眼疾或者心臟疾病。(生物谷Bioon.com)
doi:10.1038/ng.2700
PMC:
PMID:
Association between large detectable clonal mosaicism and type 2 diabetes with vascular complications
Amélie Bonnefond, Boris Skrobek, Stéphane Lobbens, Elodie Eury, Dorothée Thuillier, Stéphane Cauchi, Olivier Lantieri, Beverley Balkau, Elio Riboli, Michel Marre, Guillaume Charpentier, Loïc Yengo & Philippe Froguel
Large chromosomal clonal mosaic events (CMEs) have been suggested to be linked to aging1, 2, 3 and to predict cancer2, 3. Type 2 diabetes (T2D) has been conceptualized as an accelerated-aging disease4, 5, 6 and is associated with higher prevalence of cancers7, 8, 9, 10, 11. Here we aimed to assess the association between T2D and CME occurrence in blood. We evaluated the presence of CMEs in 7,659 individuals (including 2,208 with T2D) using DNA arrays. A significant association between CME occurrence and T2D was found (odds ratio (OR) = 5.3; P = 5.1 × 10−5) and was stronger when we only considered non-obese individuals with T2D (OR = 5.6; P = 4.9 × 10−5). Notably, CME carriers with T2D had higher prevalence of vascular complications than non-carriers with T2D (71.4% versus 37.1%, respectively; P = 7.7 × 10−4). In CME carriers, we found an increase in the percentage of abnormal cells over 6 years (P = 8.60 × 10−3). In conclusion, given the increased risk of cancer in CME carriers2, 3, our results may have profound clinical implications in patients with severe T2D.