Immunolocalization and expression of vascular endothelial growth factor receptors (VEGFRs) and neuropilins (NRPs) on Keratinocytes in human epidermis

Vascular endothelial growth factor (VEGF) plays an important role in normal and pathological angiogenesis. VEGF receptors (VEGFRs, including VEGFR-1, VEGFR-2, and VEGFR-3) and neuropilins (NRPs, including NRP-1 and NRF-2) are high-affinity receptors for V

Phylogenomic study of the subfamily Caprinae by cross-species chromosome painting with Chinese muntjac paints

Chromosomal homologies have been established between the Chinese muntjac (Muntiacus reevesi, MRE, 2n = 46) and five ovine species: wild goat (Capra aegagrus, CAE, 2n = 60), argall (Ovis ammon, OAM, 2n = 56), snow sheep (Ovis nivicola, ONI, 2n = 52), red goral (Naemorhedus cranbrooki, NCR, 2n = 56) and Sumatra serow (Capricornis sumatraensis, CSU, 2n = 48) by chromosome painting with a set of chromosome-specific probes of the Chinese muntjac. In total, twenty-two Chinese muntjac autosomal painting probes detected thirty-five homologous segments in the genome of each species. The chromosome X probe hybridized to the whole X chromosomes of all ovine species while the chromosome Y probe gave no signal. Our results demonstrate that almost all homologous segments defined by comparative painting show a high degree of conservation in G-banding patterns and that each speciation event is accompanied by specific chromosomal rearrangements. The combined analysis of our results and previous cytogenetic and molecular systematic results enables us to map the chromosomal rearrangements onto a phylogenetic tree, thus providing new insights into the karyotypic evolution of these species.

胎牛血清促进色素上皮衍生因子在皮肤角质形成细胞和成纤维细胞中的表达

下载PDF阅读器目的:探讨表皮角质形成细胞和真皮成纤维细胞中色素上皮衍生因子(PEDF) 表达的影响因素.方法:体外培养角质形成细胞和成纤维细胞,并以10%FBS(胎牛血清)刺激,通过免疫荧光和Western blot检测PEDF的表达.结果:PEDF大多位于细胞浆中,但在细胞核中也有少量表达.细胞浆中PEDF并非均质型分布,而是呈细颗粒状集聚.10%FBS促进角质形成细胞和成纤维细胞中PEDF的集聚和表达,而且这一分布形式不受组胺和佛波肉豆蔻醋酸(PMA) 的影响.结论:10% FBS促进角质形成细胞和成纤维细胞中PEDF的集聚和表达.

Expression of VEGFR-2 on HaCaT cells is regulated by VEGF and plays an active role in mediating VEGF induced effects

Vascular endothelial growth factor (VEGF) and its receptor VEGFR-2 play important roles in mitogenesis and chemotaxis of endothelial cells. In normal human skin, VEGF is expressed and secreted by epidermal keratinocytes. Emerging data suggest that keratin