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补充牛磺酸与胰腺重塑

Taurine supplementation and pancreatic remodeling.

作者信息

El Idrissi Abdeslem, Boukarrou Latifa, L'Amoreaux William

机构信息

Department of Biology, City University of New York Graduate School, NewYork, USA.

出版信息

Adv Exp Med Biol. 2009;643:353-8.

Abstract

Taurine is a semi-essential sulphur containing amino acid derived from methionine and cysteine metabolism. Taurine has several biological processes such as hypoglycemic action, antioxidation, and detoxification. In this study we evaluated the role of taurine in pancreatic islets development, since the endocrine pancreas undergoes significant modifications during neonatal life. Histological examination of the pancreas from taurine-fed mice revealed no histological abnormalities in the endocrine or exocrine parts of the pancreas. However, supplementation of taurine in the drinking water resulted in a drastic and significant increase in the number of islets per section. Furthermore, islets size was significantly larger. We hypothesize that supplementation of taurine, which is important for the development of the endocrine pancreas may reduce cytokine-induced apoptosis in pancreatic beta cells. The endocrine pancreas undergoes significant modifications during neonatal life and apoptosis is an important mechanism in this remodeling. We suggest that alteration of this remodeling process during this period of time, when a fine balance between cell replication and cell death is critical, would affect the development of the pancreatic islets of Langerhans, and could have important effects on the pancreatic cell mass and the endocrine function.

摘要

牛磺酸是一种半必需的含硫氨基酸,由蛋氨酸和半胱氨酸代谢产生。牛磺酸具有多种生物学功能,如降血糖作用、抗氧化作用和解毒作用。在本研究中,我们评估了牛磺酸在胰岛发育中的作用,因为内分泌胰腺在新生儿期会发生显著变化。对喂食牛磺酸的小鼠胰腺进行组织学检查发现,胰腺的内分泌或外分泌部分均无组织学异常。然而,在饮用水中补充牛磺酸导致每切片胰岛数量急剧且显著增加。此外,胰岛尺寸也明显更大。我们推测,对内分泌胰腺发育很重要的牛磺酸补充可能会减少细胞因子诱导的胰腺β细胞凋亡。内分泌胰腺在新生儿期会发生显著变化,而凋亡是这种重塑过程中的一个重要机制。我们认为,在细胞复制和细胞死亡之间的精细平衡至关重要的这段时间内,改变这种重塑过程会影响朗格汉斯胰岛的发育,并可能对胰腺细胞数量和内分泌功能产生重要影响。

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