{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,2]],"date-time":"2026-01-02T17:28:28Z","timestamp":1767374908309,"version":"3.37.3"},"reference-count":74,"publisher":"Portland Press Ltd.","issue":"2","license":[{"start":{"date-parts":[[2021,1,7]],"date-time":"2021-01-07T00:00:00Z","timestamp":1609977600000},"content-version":"vor","delay-in-days":6,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["portlandpress.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2021,1,29]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>Diabetes increases the risk for ischemic vascular diseases, which is further elevated in older adults. Bone marrow-derived hematopoietic CD34+ stem\/progenitor cells have the potential of revascularization; however, diabetes attenuates vasoreparative functions. Angiotensin-converting enzyme 2 (ACE2) is the vasoprotective enzyme of renin\u2013angiotensin system in contrast with the canonical angiotensin-converting enzyme (ACE). The present study tested the hypothesis that diabetic dysfunction is associated with ACE2\/ACE imbalance in hematopoietic stem\/progenitor cells (HSPCs) and that increasing ACE2 expression would restore reparative functions. Blood samples from male and female diabetic (n=71) or nondiabetic (n=62) individuals were obtained and CD34+ cells were enumerated by flow cytometry. ACE and ACE2 enzyme activities were determined in cell lysates. Lentiviral (LV) approach was used to increase the expression of soluble ACE2 protein. Cells from diabetic older adults (DB) or nondiabetic individuals (Control) were evaluated for their ability to stimulate revascularization in a mouse model of hindlimb ischemia (HLI). DB cells attenuated the recovery of blood flow to ischemic areas in nondiabetic mice compared with that observed with Control cells. Administration of DB cells modified with LV-ACE2 resulted in complete restoration of blood flow. HLI in diabetic mice resulted in poor recovery with amputations, which was not reversed by either Control or DB cells. LV-ACE2 modification of Control or DB cells resulted in blood flow recovery in diabetic mice. In vitro treatment with Ang-(1-7) modified paracrine profile in diabetic CD34+ cells. The present study suggests that vasoreparative dysfunction in CD34+ cells from diabetic older adults is associated with ACE2\/ACE imbalance and that increased ACE2 expression enhances the revascularization potential.<\/jats:p>","DOI":"10.1042\/cs20201133","type":"journal-article","created":{"date-parts":[[2021,1,13]],"date-time":"2021-01-13T09:07:26Z","timestamp":1610528846000},"page":"367-385","update-policy":"https:\/\/doi.org\/10.1042\/crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["ACE2 gene transfer ameliorates vasoreparative dysfunction in CD34+ cells derived from diabetic older adults"],"prefix":"10.1042","volume":"135","author":[{"given":"Shrinidh","family":"Joshi","sequence":"first","affiliation":[{"name":"Department of Pharmaceutical Sciences, College of Health Professions, North Dakota State University, Fargo, ND 58108, U.S.A."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ildamaris","family":"Montes de Oca","sequence":"additional","affiliation":[{"name":"Museum District Eye Clinic, Houston, TX, U.S.A."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ahmad","family":"Maghrabi","sequence":"additional","affiliation":[{"name":"Museum District Eye Clinic, Houston, TX, U.S.A."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christine","family":"Lopez-Yang","sequence":"additional","affiliation":[{"name":"Museum District Eye Clinic, Houston, TX, U.S.A."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Julio","family":"Quiroz-Olvera","sequence":"additional","affiliation":[{"name":"Museum District Eye Clinic, Houston, TX, U.S.A."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Charles A.","family":"Garcia","sequence":"additional","affiliation":[{"name":"Museum District Eye Clinic, Houston, TX, U.S.A."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7186-3693","authenticated-orcid":false,"given":"Yagna Prasada Rao","family":"Jarajapu","sequence":"additional","affiliation":[{"name":"Department of Pharmaceutical Sciences, College of Health Professions, North Dakota State University, Fargo, ND 58108, U.S.A."}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"288","published-online":{"date-parts":[[2021,1,27]]},"reference":[{"key":"2021113011185071800_B1","doi-asserted-by":"publisher","first-page":"67","DOI":"10.2174\/157016106775203126","article-title":"Angiotensin II regulates vascular and endothelial dysfunction: recent topics of Angiotensin II type-1 receptor signaling in the vasculature","volume":"4","author":"Nakashima","year":"2006","journal-title":"Curr. 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