基因PVT1可能与糖尿病肾病有关
文章来源:未知 文章作者:enread 发布时间:2011-04-24 01:03 字体: [ ]  进入论坛
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A gene1 called PVT1 may help reduce the kidneys ability to filter blood, leading to kidney disease, kidney failure and death, according to a study published today by researchers at the Translational Genomics Research Institute (TGen). The TGen team found PVT1 expression levels increased up to 5-fold in response to hyperglycemia(高血糖症) , or high blood sugar, a condition that often accompanies diabetes2.

But by knocking down or reducing the expression of the PVT1gene, TGen researchers lowered the amount of proteins associated with the excessive accumulation of extracellular matrix (ECM细胞外基质) in glomeruli(肾小球) , part of the basic filtration unit of kidneys, according to the TGen study published today in the online scientific journal Public Library of Science (PLoS) ONE.

The accumulation of excessive ECM within the mesangial cells, which regulate blood flow in capillaries4 inside the kidney, is a hallmark of diabetic nephropathy(肾病) , or kidney disease, which is the leading cause of reduced life expectancy5 among the nation's growing numbers of diabetics.

"The goal of this study was to identify possible molecular6 mechanisms7 by which PVT1 may contribute to the development and progression of diabetic nephropathy in mesangial cells," said Dr. Johanna DiStefano, the study's senior author and Director of TGen's Diabetes, Cardiovascular and Metabolic8 Diseases Center.

"Despite the growing magnitude of the disease, the molecular mechanisms underlying9 the etiology(病因学) of diabetic nephropathy remain poorly understood," Dr. DiStefano said.

PVT1, also known as plasmacytoma(浆细胞瘤) variant10 translocation 1, was previously11 identified by Dr. DiStefano's team as a candidate gene for End Stage Renal Disease (ESRD), or kidney failure. Too much PVT1 also has been associated with breast and ovarian cancers, in which it may help cause cells to multiply out of control and fail to go through the normal process of cellular3 death.

Through RNA interference, which helps control which genes12 are active and the degree of their activity, researchers reduced the expression of PVT1, which in turn reduced the protein levels of ECM components14.

In a related finding, TGen scientists discovered that PVT1 affects the expression of other genes — FN1, COL4A1 and PAI-1 — in a manner that is at least partially15 independent of TFFB1, a gene associated with tissue fibrosis(纤维化) , or tissue damage.

"Delineation16(描述) of the relationship between TGFB1 and PVT1 represents a critical component13 toward understanding the molecular mechanisms underlying the regulation of ECM in diabetic nephropathy," said Dr. Lucrecia Alvarez, the study's lead author and a TGen post-doctoral fellow.



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1 gene WgKxx     
n.遗传因子,基因
参考例句:
  • A single gene may have many effects.单一基因可能具有很多种效应。
  • The targeting of gene therapy has been paid close attention.其中基因治疗的靶向性是值得密切关注的问题之一。
2 diabetes uPnzu     
n.糖尿病
参考例句:
  • In case of diabetes, physicians advise against the use of sugar.对于糖尿病患者,医生告诫他们不要吃糖。
  • Diabetes is caused by a fault in the insulin production of the body.糖尿病是由体內胰岛素分泌失调引起的。
3 cellular aU1yo     
adj.移动的;细胞的,由细胞组成的
参考例句:
  • She has a cellular telephone in her car.她的汽车里有一部无线通讯电话机。
  • Many people use cellular materials as sensitive elements in hygrometers.很多人用蜂窝状的材料作为测量温度的传感元件。
4 capillaries d0d7ccc2f58ea09ec26e13a0d6ffd34a     
毛细管,毛细血管( capillary的名词复数 )
参考例句:
  • The blood flows from the capillaries back into the veins. 血从毛细血管流回静脉。
  • While Joe sleeps, a large percentage of his capillaries are inactive. 当乔睡觉时,他的毛细血管大部分是不工作的。
5 expectancy tlMys     
n.期望,预期,(根据概率统计求得)预期数额
参考例句:
  • Japanese people have a very high life expectancy.日本人的平均寿命非常长。
  • The atomosphere of tense expectancy sobered everyone.这种期望的紧张气氛使每个人变得严肃起来。
6 molecular mE9xh     
adj.分子的;克分子的
参考例句:
  • The research will provide direct insight into molecular mechanisms.这项研究将使人能够直接地了解分子的机理。
  • For the pressure to become zero, molecular bombardment must cease.当压强趋近于零时,分子的碰撞就停止了。
7 mechanisms d0db71d70348ef1c49f05f59097917b8     
n.机械( mechanism的名词复数 );机械装置;[生物学] 机制;机械作用
参考例句:
  • The research will provide direct insight into molecular mechanisms. 这项研究将使人能够直接地了解分子的机理。 来自《简明英汉词典》
  • He explained how the two mechanisms worked. 他解释这两台机械装置是如何工作的。 来自《简明英汉词典》
8 metabolic 2R4z1     
adj.新陈代谢的
参考例句:
  • Impressive metabolic alternations have been undergone during embryogenesis.在胚胎发生期间经历了深刻的代谢变化。
  • A number of intoxicants are associated with metabolic acidosis.许多毒性物质可引起代谢性酸中毒。
9 underlying 5fyz8c     
adj.在下面的,含蓄的,潜在的
参考例句:
  • The underlying theme of the novel is very serious.小说隐含的主题是十分严肃的。
  • This word has its underlying meaning.这个单词有它潜在的含义。
10 variant GfuzRt     
adj.不同的,变异的;n.变体,异体
参考例句:
  • We give professional suggestions according to variant tanning stages for each customer.我们针对每位顾客不同的日晒阶段,提供强度适合的晒黑建议。
  • In a variant of this approach,the tests are data- driven.这个方法的一个变种,是数据驱动的测试。
11 previously bkzzzC     
adv.以前,先前(地)
参考例句:
  • The bicycle tyre blew out at a previously damaged point.自行车胎在以前损坏过的地方又爆开了。
  • Let me digress for a moment and explain what had happened previously.让我岔开一会儿,解释原先发生了什么。
12 genes 01914f8eac35d7e14afa065217edd8c0     
n.基因( gene的名词复数 )
参考例句:
  • You have good genes from your parents, so you should live a long time. 你从父母那儿获得优良的基因,所以能够活得很长。 来自《简明英汉词典》
  • Differences will help to reveal the functions of the genes. 它们间的差异将会帮助我们揭开基因多种功能。 来自英汉非文学 - 生命科学 - 生物技术的世纪
13 component epSzv     
n.组成部分,成分,元件;adj.组成的,合成的
参考例句:
  • Each component is carefully checked before assembly.每个零件在装配前都经过仔细检查。
  • Blade and handle are the component parts of a knife.刀身和刀柄是一把刀的组成部分。
14 components 4725dcf446a342f1473a8228e42dfa48     
(机器、设备等的)构成要素,零件,成分; 成分( component的名词复数 ); [物理化学]组分; [数学]分量; (混合物的)组成部分
参考例句:
  • the components of a machine 机器部件
  • Our chemistry teacher often reduces a compound to its components in lab. 在实验室中化学老师常把化合物分解为各种成分。
15 partially yL7xm     
adv.部分地,从某些方面讲
参考例句:
  • The door was partially concealed by the drapes.门有一部分被门帘遮住了。
  • The police managed to restore calm and the curfew was partially lifted.警方设法恢复了平静,宵禁部分解除。
16 delineation wxrxV     
n.记述;描写
参考例句:
  • Biography must to some extent delineate characters.传记必须在一定程度上描绘人物。
  • Delineation of channels is the first step of geologic evaluation.勾划河道的轮廓是地质解译的第一步。
TAG标签: disease gene kidney
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