Rfx6 directs islet formation and insulin production in mice and humans.

Rfx6 directs islet formation and insulin production in mice and humans.
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DOI:
10.1038/nature08748
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发表时间:
2010-02-11
期刊:
影响因子:
64.8
通讯作者:
--
中科院分区:
综合性期刊1区
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来自朗格汉斯胰岛 β 细胞的胰岛素控制着脊椎动物的能量稳态,其缺乏会导致糖尿病。在胚胎发育过程中,转录因子 Neurogenin3 启动 β 细胞和其他胰岛细胞类型从胰腺内胚层的分化,但随后完成这种分化的遗传程序仍不完全清楚。在这里,我们表明转录因子 Rfx6 指导 Neurogenin3 下游的胰岛细胞分化。缺乏Rfx6的小鼠无法产生除产生胰腺多肽的细胞之外的任何正常胰岛细胞类型。在患有类似新生儿糖尿病常染色体隐性遗传综合征的人类婴儿中,基因图谱和随后的测序发现了人类 RFX6 基因的突变。这些研究证明了 Rfx6 在协调小鼠和人类胰岛发育的因素层次中的独特地位。 Rfx6 可能有助于为糖尿病患者生成 β 细胞。
Insulin from the β-cells of the pancreatic islets of Langerhans controls energy homeostasis in vertebrates, and its deficiency causes diabetes mellitus. During embryonic development, the transcription factor Neurogenin3 initiates the differentiation of the β-cells and other islet cell types from pancreatic endoderm, but the genetic program that subsequently completes this differentiation remains incompletely understood. Here we show that the transcription factor Rfx6 directs islet cell differentiation downstream of Neurogenin3. Mice lacking Rfx6 failed to generate any of the normal islet cell types except for pancreatic-polypeptide-producing cells. In human infants with a similar autosomal recessive syndrome of neonatal diabetes, genetic mapping and subsequent sequencing identified mutations in the human RFX6 gene. These studies demonstrate a unique position for Rfx6 in the hierarchy of factors that coordinate pancreatic islet development in both mice and humans. Rfx6 could prove useful in efforts to generate β-cells for patients with diabetes.
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