{"title":"软骨IIB型前胶原nh2前肽,PIIBNP,抑制血管生成","authors":"Zhepeng Wang, Aiwu Lu","doi":"10.3934/molsci.2021022","DOIUrl":null,"url":null,"abstract":"<abstract> <p>Cartilage tissue is avascular and resistant to tumor invasion, but the basis for these properties is still unclear. Here we report that the NH<sub>2</sub>-propeptide of type IIB procollagen (PIIBNP), a product of collagen biosynthesis, is capable of inhibiting angiogenesis both <italic>in vitro</italic> and <italic>in vivo</italic>. PIIBNP inhibits tube formation in human umbilical vein cells (HUVEC), inhibits endogenous endothelial cell outgrowth in mouse aortic ring angiogenesis bioassay and is anti-angiogenic in the mouse cornea angiogenesis assay. As α<sub>V</sub>ß<sub>3</sub> and α<sub>V</sub>ß<sub>5</sub> integrins are expressed primarily in endothelial cells, cancer cells and osteoclasts, but not in normal chondrocytes and PIIBNP binds to cell surface integrin α<sub>V</sub>ß<sub>3</sub> and αVß<sub>5</sub>, we propose that natural occurring PIIBNP protects cartilage by targeting endothelial cells during chondrogenesis, thus inhibiting angiogenesis, and rendering the tissue avascular.</p> </abstract>","PeriodicalId":44217,"journal":{"name":"AIMS Molecular Science","volume":null,"pages":null},"PeriodicalIF":0.7000,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Cartilage type IIB procollagen NH2-propeptide, PIIBNP, inhibits angiogenesis\",\"authors\":\"Zhepeng Wang, Aiwu Lu\",\"doi\":\"10.3934/molsci.2021022\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<abstract> <p>Cartilage tissue is avascular and resistant to tumor invasion, but the basis for these properties is still unclear. Here we report that the NH<sub>2</sub>-propeptide of type IIB procollagen (PIIBNP), a product of collagen biosynthesis, is capable of inhibiting angiogenesis both <italic>in vitro</italic> and <italic>in vivo</italic>. PIIBNP inhibits tube formation in human umbilical vein cells (HUVEC), inhibits endogenous endothelial cell outgrowth in mouse aortic ring angiogenesis bioassay and is anti-angiogenic in the mouse cornea angiogenesis assay. As α<sub>V</sub>ß<sub>3</sub> and α<sub>V</sub>ß<sub>5</sub> integrins are expressed primarily in endothelial cells, cancer cells and osteoclasts, but not in normal chondrocytes and PIIBNP binds to cell surface integrin α<sub>V</sub>ß<sub>3</sub> and αVß<sub>5</sub>, we propose that natural occurring PIIBNP protects cartilage by targeting endothelial cells during chondrogenesis, thus inhibiting angiogenesis, and rendering the tissue avascular.</p> </abstract>\",\"PeriodicalId\":44217,\"journal\":{\"name\":\"AIMS Molecular Science\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.7000,\"publicationDate\":\"2021-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"AIMS Molecular Science\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.3934/molsci.2021022\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"BIOCHEMISTRY & MOLECULAR BIOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"AIMS Molecular Science","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3934/molsci.2021022","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"BIOCHEMISTRY & MOLECULAR BIOLOGY","Score":null,"Total":0}
Cartilage type IIB procollagen NH2-propeptide, PIIBNP, inhibits angiogenesis
Cartilage tissue is avascular and resistant to tumor invasion, but the basis for these properties is still unclear. Here we report that the NH2-propeptide of type IIB procollagen (PIIBNP), a product of collagen biosynthesis, is capable of inhibiting angiogenesis both in vitro and in vivo. PIIBNP inhibits tube formation in human umbilical vein cells (HUVEC), inhibits endogenous endothelial cell outgrowth in mouse aortic ring angiogenesis bioassay and is anti-angiogenic in the mouse cornea angiogenesis assay. As αVß3 and αVß5 integrins are expressed primarily in endothelial cells, cancer cells and osteoclasts, but not in normal chondrocytes and PIIBNP binds to cell surface integrin αVß3 and αVß5, we propose that natural occurring PIIBNP protects cartilage by targeting endothelial cells during chondrogenesis, thus inhibiting angiogenesis, and rendering the tissue avascular.