相关实验视频

Updated: Jun 17, 2025

Differentiation of Human Pluripotent Stem Cells Into Pancreatic Beta-Cell Precursors in a 2D Culture System

Differentiation of Human Pluripotent Stem Cells Into Pancreatic Beta-Cell Precursors in a 2D Culture System

Published on: December 16, 2021

多个促进剂和增强剂的差异可能有助于增强G6PC2表达在人与小鼠胰岛阿尔法细胞中的增强

Cyrus C Martin¹, James K Oeser¹, Tenzin Wangmo¹

¹Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, Tennessee, USA.

Journal of molecular endocrinology

|August 9, 2024

概括

葡萄糖-6-酸酶催化子单元2 (G6PC2) 影响胰岛素和葡萄糖分泌. 胰腺细胞之间的人类G6PC2表达差异不同于小鼠,这表明人类葡萄糖调节中的作用更大. 这项研究调查了这些差异的遗传基础.

科学领域:

内分泌学在内分泌学.
分子生物学分子生物学
遗传学是一个遗传学.

背景情况:

G6PC2通过在胰腺小岛中对抗葡萄糖激素酶来调节葡萄糖平衡.
鼠标和人类胰腺α和β细胞之间G6PC2的不同表达影响胰岛素和葡萄糖分泌敏感度.
人类G6PC2与小鼠G6pc2.2相比,细胞类型之间的表达差异较小.

研究的目的:

为了确定负责差异性小鼠G6pc2表达在阿尔法和β细胞的基因组区域.
了解改变人类G6PC2表达率的进化变化.
开发一个人性化的小鼠模型来研究阿尔法细胞中增强的G6PC2表达.

主要方法:

在小鼠和人类岛屿衍生细胞系中对G6PC2促进体活性进行比较分析.
研究转录增强剂活性和葡萄糖皮质醇水平对G6PC2表达的影响.
与G6PC2调节有关的小鼠特异性非编码RNA (Gm13613) 的功能分析.

主要成果:

邻近促进体活性的差异导致了小鼠和人类胰腺细胞类型之间的G6PC2表达差异.
葡萄糖皮质醇水平和八种转录增强剂的变化显著影响物种之间的G6PC2表达差异.
通过G6pc2增强剂I调节的小鼠非编码RNAGm13613,不会影响G6pc2表达.

结论:

在G6PC2调节中的进化变化,包括促进剂活性和增强剂功能,解释了特定物种的表达模式.
葡萄皮质皮质体和转录增强剂在调节G6PC2表达方面发挥着关键作用.
在人性化的小鼠模型中,Gm13613不太可能影响G6PC2功能.

关键词:

克里斯普尔是什么意思?克里斯普尔是什么意思?增强剂是一种增强剂.葡萄糖激素分泌的分泌物葡萄糖的新陈代谢.葡萄糖-6-酸盐酶是什么胰岛素分泌胰岛素分泌小小的岛屿小小的岛屿这里是鼠标鼠标鼠标鼠标鼠标鼠标.活动主办人活动主办人

更多相关视频

Author Spotlight: Advancements and Challenges in β-Cells Differentiation from Pluripotent Stem Cells

Author Spotlight: Advancements and Challenges in β-Cells Differentiation from Pluripotent Stem Cells

Published on: February 2, 2024

Efficient Generation of Pancreas/Duodenum Homeobox Protein 1+ Posterior Foregut/Pancreatic Progenitors from hPSCs in Adhesion Cultures

Efficient Generation of Pancreas/Duodenum Homeobox Protein 1+ Posterior Foregut/Pancreatic Progenitors from hPSCs in Adhesion Cultures

Published on: March 27, 2019

相关概念视频

Cell Specific Gene Expression

Cell Specific Gene Expression

Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...

The Eukaryotic Promoter Region

The Eukaryotic Promoter Region

The eukaryotic promoter region is a segment of DNA located upstream of a gene. It contains an RNA polymerase binding site, a transcription start site, and several cis-regulatory sequences. The proximal promoter region is located in the vicinity of the gene and has cis-regulatory sequences and the core promoter. The core promoter is the binding site for RNA polymerase and is usually located between -35 and +35 nucleotides from the transcription start site. The distal promoter regions are...

Glucose Homeostasis: Pancreatic Islets and Insulin Secretion

Glucose Homeostasis: Pancreatic Islets and Insulin Secretion

The pancreatic islets comprising only 1%-2% of the volume are highly vascularized and innervated mini-organs. They contain five endocrine cell types, including β cells that secrete insulin, which is synthesized as a single polypeptide chain, preproinsulin, processed to proinsulin, and finally to insulin and C-peptide. This process is complex and regulated, involving the Golgi complex, the endoplasmic reticulum, and the secretory granules of the β cell.
Insulin and C-peptide are...