{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,10]],"date-time":"2026-05-10T20:15:20Z","timestamp":1778444120715,"version":"3.51.4"},"reference-count":55,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2023,5,31]],"date-time":"2023-05-31T00:00:00Z","timestamp":1685491200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"BPI France"},{"name":"Conseil D\u00e9partemental du Haut\u2013Rhin"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJMS"],"abstract":"<jats:p>Ex vivo monitored human CD34+ stem cells (SCs) injected into myocardium scar tissue have shown real benefits for the recovery of patients with myocardial infarctions. They have been used previously in clinical trials with hopeful results and are expected to be promising for cardiac regenerative medicine following severe acute myocardial infarctions. However, some debates on their potential efficacy in cardiac regenerative therapies remain to be clarified. To elucidate the levels of CD34+ SC implication and contribution in cardiac regeneration, better identification of the main regulators, pathways, and genes involved in their potential cardiovascular differentiation and paracrine secretion needs to be determined. We first developed a protocol thought to commit human CD34+ SCs purified from cord blood toward an early cardiovascular lineage. Then, by using a microarray-based approach, we followed their gene expression during differentiation. We compared the transcriptome of undifferentiated CD34+ cells to those induced at two stages of differentiation (i.e., day three and day fourteen), with human cardiomyocyte progenitor cells (CMPCs), as well as cardiomyocytes as controls. Interestingly, in the treated cells, we observed an increase in the expressions of the main regulators usually present in cardiovascular cells. We identified cell surface markers of the cardiac mesoderm, such as kinase insert domain receptor (KDR) and the cardiogenic surface receptor Frizzled 4 (FZD4), induced in the differentiated cells in comparison to undifferentiated CD34+ cells. The Wnt and TGF-\u03b2 pathways appeared to be involved in this activation. This study underlined the real capacity of effectively stimulated CD34+ SCs to express cardiac markers and, once induced, allowed the identification of markers that are known to be involved in vascular and early cardiogenesis, demonstrating their potential priming towards cardiovascular cells. These findings could complement their paracrine positive effects known in cell therapy for heart disease and may help improve the efficacy and safety of using ex vivo expanded CD34+ SCs.<\/jats:p>","DOI":"10.3390\/ijms24119551","type":"journal-article","created":{"date-parts":[[2023,6,1]],"date-time":"2023-06-01T03:06:00Z","timestamp":1685588760000},"page":"9551","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Deciphering the Cardiovascular Potential of Human CD34+ Stem Cells"],"prefix":"10.3390","volume":"24","author":[{"given":"Anne","family":"Aries","sequence":"first","affiliation":[{"name":"Institut de Recherche en H\u00e9matologie et Transplantation (IRHT), H\u00f4pital du Hasenrain, 87 Avenue d\u2019Altkirch, 68100 Mulhouse, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"C\u00e9line","family":"Zanetti","sequence":"additional","affiliation":[{"name":"Institut de Recherche en H\u00e9matologie et Transplantation (IRHT), H\u00f4pital du Hasenrain, 87 Avenue d\u2019Altkirch, 68100 Mulhouse, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Philippe","family":"H\u00e9non","sequence":"additional","affiliation":[{"name":"CellProthera, 12, Rue du Parc, 68100 Mulhouse, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2175-6785","authenticated-orcid":false,"given":"Bernard","family":"Dr\u00e9nou","sequence":"additional","affiliation":[{"name":"Institut de Recherche en H\u00e9matologie et Transplantation (IRHT), H\u00f4pital du Hasenrain, 87 Avenue d\u2019Altkirch, 68100 Mulhouse, France"},{"name":"Groupe Hospitalier de la R\u00e9gion de Mulhouse Sud-Alsace, H\u00f4pital E. Muller, 20 Avenue de Dr Laennec, 68100 Mulhouse, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2966-6386","authenticated-orcid":false,"given":"Rachid","family":"Lahlil","sequence":"additional","affiliation":[{"name":"Institut de Recherche en H\u00e9matologie et Transplantation (IRHT), H\u00f4pital du Hasenrain, 87 Avenue d\u2019Altkirch, 68100 Mulhouse, France"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2023,5,31]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"266","DOI":"10.1161\/CIRCRESAHA.118.311217","article-title":"Clinical Studies of Cell Therapy in Cardiovascular Medicine: Recent Developments and Future Directions","volume":"123","author":"Banerjee","year":"2018","journal-title":"Circ. 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