1. Generation and identification of endothelial-specific Hrh2 knockout mice
- Author
-
Rui Meng, Wen-Ke Cai, Gong-Hao He, Zhi-Ran Li, Yan-Hua Huang, Yu-Xin Fan, Ping Wang, Tao Zhou, Qiang Feng, Wen-Mang Xu, and Qin Yang
- Subjects
0106 biological sciences ,0301 basic medicine ,Cell ,Codon, Initiator ,Cre recombinase ,Biology ,01 natural sciences ,Mice ,03 medical and health sciences ,Exon ,Antigens, CD ,Conditional gene knockout ,Genetics ,medicine ,Animals ,Receptors, Histamine H2 ,Embryonic Stem Cells ,Mice, Knockout ,Integrases ,Chimera ,Endothelial Cells ,Gene Expression Regulation, Developmental ,Neomycin ,Exons ,Cadherins ,Embryonic stem cell ,Cell biology ,Endothelial stem cell ,Blastocyst ,030104 developmental biology ,medicine.anatomical_structure ,Knockout mouse ,Animal Science and Zoology ,Cre-Lox recombination ,Agronomy and Crop Science ,010606 plant biology & botany ,Biotechnology - Abstract
Histamine H2 receptor (HRH2) is closely associated with the development of cardiovascular and cerebrovascular diseases. However, systematic Hrh2 knockout mice did not exactly reflect the HRH2 function in specific cell or tissue types. To better understand the physiological and pathophysiological functions of endothelial HRH2, this study constructed a targeting vector that contained loxp sites flanking the ATG start codon located in Hrh2 exon 2 upstream and a neomycin (Neo) resistance gene flanked by self-deletion anchor sites within the mouse Hrh2 allele. The targeting vector was then electroporated into C57BL/6J embryonic stem (ES) cells, and positively targeted ES cell clones were micoinjected into C57BL/6J blastocysts, which were implanted into pseudopregnant females to obtain chimeric mice. The F1 generation of Hrh2flox/+ mice was generated via crossing chimeric mice with wild-type mice to excise Neo. We also successfully generated endothelial cell-specific knockout (ECKO) mice by crossing Hrh2flox/+ mice with Cdh5-Cre mice that specifically express Cre in endothelial cells and identified that Hrh2 deletion was only observed in endothelial cells. Hrh2flox/+ and Hrh2ECKO mice were normal, healthy and fertile and did not display any obvious abnormalities. These novel animal models will create new prospects for exploring roles of HRH2 during the development and treatment of related diseases.
- Published
- 2021