Aya Al‐Katat, Laurie Boudreau, Emmanuelle Gagnon, Ines Assous, Louis Villeneuve, Charles Alexandre Leblanc, Alexandre Bergeron, Martin Sirois, Ismael El‐Hamamsy, Angelino Calderone
{"title":"更高的 TIMP-1 蛋白水平和新内膜形成代表了限制雌性大鼠主动脉血管扩张的性别依赖性细胞事件","authors":"Aya Al‐Katat, Laurie Boudreau, Emmanuelle Gagnon, Ines Assous, Louis Villeneuve, Charles Alexandre Leblanc, Alexandre Bergeron, Martin Sirois, Ismael El‐Hamamsy, Angelino Calderone","doi":"10.1002/iub.2916","DOIUrl":null,"url":null,"abstract":"Fragmentation/loss of the structural protein elastin represents the precipitating event translating to aortic expansion and subsequent aneurysm formation. The present study tested the hypothesis that greater protein expression of tissue inhibitor of matrix metalloproteinase‐1 (TIMP‐1) and neointimal growth secondary to a reduction of medial elastin content represent sex‐dependent events limiting aortic vessel expansion in females. TIMP‐1 protein levels were higher in the ascending aorta of female versus male patients diagnosed with a bicuspid aortic valve (BAV). The latter paradigm was recapitulated in the aorta of adult male and female rats complemented by greater TIMP‐2 expression in females. CaCl<jats:sub>2</jats:sub> (0.5 M) treatment of the infrarenal aorta of adult male and female rats increased the in situ vessel diameter and expansion was significantly smaller in females despite a comparable reduction of medial elastin content. The preferential appearance of a neointimal region of the CaCl<jats:sub>2</jats:sub>‐treated infrarenal aorta of female rats may explain in part the smaller in situ expansion and neointimal growth correlated positively with the % change of the in situ diameter. Neointimal formation was secondary to a significant increase in the density of medial/neointimal vascular smooth muscle cells (VSMCs) that re‐entered the G<jats:sub>2</jats:sub>‐M phase whereas VSMC cell cycle re‐entry was attenuated in the CaCl<jats:sub>2</jats:sub>‐treated infrarenal aorta of male rats. Thus, greater TIMP‐1 expression in the aorta of female BAV patients may prevent excessive elastin fragmentation and preferential neointimal growth following CaCl<jats:sub>2</jats:sub>‐treatment of the infrarenal aorta of female rats represents a sex‐dependent biological event limiting vessel expansion secondary to a significant loss of the structural protein.","PeriodicalId":14728,"journal":{"name":"IUBMB Life","volume":null,"pages":null},"PeriodicalIF":3.7000,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Greater TIMP‐1 protein levels and neointimal formation represent sex‐dependent cellular events limiting aortic vessel expansion in female rats\",\"authors\":\"Aya Al‐Katat, Laurie Boudreau, Emmanuelle Gagnon, Ines Assous, Louis Villeneuve, Charles Alexandre Leblanc, Alexandre Bergeron, Martin Sirois, Ismael El‐Hamamsy, Angelino Calderone\",\"doi\":\"10.1002/iub.2916\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Fragmentation/loss of the structural protein elastin represents the precipitating event translating to aortic expansion and subsequent aneurysm formation. The present study tested the hypothesis that greater protein expression of tissue inhibitor of matrix metalloproteinase‐1 (TIMP‐1) and neointimal growth secondary to a reduction of medial elastin content represent sex‐dependent events limiting aortic vessel expansion in females. TIMP‐1 protein levels were higher in the ascending aorta of female versus male patients diagnosed with a bicuspid aortic valve (BAV). The latter paradigm was recapitulated in the aorta of adult male and female rats complemented by greater TIMP‐2 expression in females. CaCl<jats:sub>2</jats:sub> (0.5 M) treatment of the infrarenal aorta of adult male and female rats increased the in situ vessel diameter and expansion was significantly smaller in females despite a comparable reduction of medial elastin content. The preferential appearance of a neointimal region of the CaCl<jats:sub>2</jats:sub>‐treated infrarenal aorta of female rats may explain in part the smaller in situ expansion and neointimal growth correlated positively with the % change of the in situ diameter. Neointimal formation was secondary to a significant increase in the density of medial/neointimal vascular smooth muscle cells (VSMCs) that re‐entered the G<jats:sub>2</jats:sub>‐M phase whereas VSMC cell cycle re‐entry was attenuated in the CaCl<jats:sub>2</jats:sub>‐treated infrarenal aorta of male rats. Thus, greater TIMP‐1 expression in the aorta of female BAV patients may prevent excessive elastin fragmentation and preferential neointimal growth following CaCl<jats:sub>2</jats:sub>‐treatment of the infrarenal aorta of female rats represents a sex‐dependent biological event limiting vessel expansion secondary to a significant loss of the structural protein.\",\"PeriodicalId\":14728,\"journal\":{\"name\":\"IUBMB Life\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.7000,\"publicationDate\":\"2024-09-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"IUBMB Life\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://doi.org/10.1002/iub.2916\",\"RegionNum\":3,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"BIOCHEMISTRY & MOLECULAR BIOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"IUBMB Life","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1002/iub.2916","RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"BIOCHEMISTRY & MOLECULAR BIOLOGY","Score":null,"Total":0}
Greater TIMP‐1 protein levels and neointimal formation represent sex‐dependent cellular events limiting aortic vessel expansion in female rats
Fragmentation/loss of the structural protein elastin represents the precipitating event translating to aortic expansion and subsequent aneurysm formation. The present study tested the hypothesis that greater protein expression of tissue inhibitor of matrix metalloproteinase‐1 (TIMP‐1) and neointimal growth secondary to a reduction of medial elastin content represent sex‐dependent events limiting aortic vessel expansion in females. TIMP‐1 protein levels were higher in the ascending aorta of female versus male patients diagnosed with a bicuspid aortic valve (BAV). The latter paradigm was recapitulated in the aorta of adult male and female rats complemented by greater TIMP‐2 expression in females. CaCl2 (0.5 M) treatment of the infrarenal aorta of adult male and female rats increased the in situ vessel diameter and expansion was significantly smaller in females despite a comparable reduction of medial elastin content. The preferential appearance of a neointimal region of the CaCl2‐treated infrarenal aorta of female rats may explain in part the smaller in situ expansion and neointimal growth correlated positively with the % change of the in situ diameter. Neointimal formation was secondary to a significant increase in the density of medial/neointimal vascular smooth muscle cells (VSMCs) that re‐entered the G2‐M phase whereas VSMC cell cycle re‐entry was attenuated in the CaCl2‐treated infrarenal aorta of male rats. Thus, greater TIMP‐1 expression in the aorta of female BAV patients may prevent excessive elastin fragmentation and preferential neointimal growth following CaCl2‐treatment of the infrarenal aorta of female rats represents a sex‐dependent biological event limiting vessel expansion secondary to a significant loss of the structural protein.
期刊介绍:
IUBMB Life is the flagship journal of the International Union of Biochemistry and Molecular Biology and is devoted to the rapid publication of the most novel and significant original research articles, reviews, and hypotheses in the broadly defined fields of biochemistry, molecular biology, cell biology, and molecular medicine.