PMID- 36502299 OWN - NLM STAT- MEDLINE DCOM- 20230711 LR - 20230718 IS - 1878-3619 (Electronic) IS - 0959-2989 (Linking) VI - 34 IP - 4 DP - 2023 TI - Experimental study on co-culture of DiI-labeled rat bone marrow mesenchymal stem cells and neonatal rat cardiomyocytes to induce differentiation into cardiomyocyte-like cells. PG - 319-330 LID - 10.3233/BME-221429 [doi] AB - BACKGROUND: Myocardial infarction is a serious clinical disease with high mortality and poor prognosis. Cardiomyocytes (CMs) have limited regeneration abilities after ischemic injury. Their growth and differentiation can be enhanced by contact co-culture with stem cells. OBJECTIVE: The aim was to study the contact co-culture of Dil-labeled bone marrow mesenchymal stem cells (BMSCs) and CMs for inducing differentiation of CMs from stem cells for treating myocardial infarction. METHODS: After contact co-culture, the differentiation of BMSCs into CMs was analyzed qualitatively by detecting myocardial markers (cardiac troponin T and alpha-smooth muscle actin) using immunofluorescence and quantitatively using flow cytometry. To examine the mechanism, possible gap junctions between BMSCs and CMs were analyzed by detecting gap junction protein connexin 43 (Cx43) expression in BMSCs using immunofluorescence. The functionality of gap junctions was analyzed using dye transfer experiments. RESULTS: The results revealed that BMSCs in contact with CMs exhibited myocardial markers and a significant increase in differentiation rate (P < 0.05); they also proved the existence and function of gap junctions between BMSCs and CMs. CONCLUSIONS: It was shown that contact co-culture can induce Dil-labeled BMSCs to differentiate into CM-like cells and examined the principle of gap junction-mediated signaling pathways involved in inducing stem cells to differentiate into cardiomyocytes. FAU - Mu, Junsheng AU - Mu J AD - Department of Cardiac Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart Lung and Blood Vessel Diseases, Beijing, China. FAU - Zhang, Zichang AU - Zhang Z AD - Department of Cardiac Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart Lung and Blood Vessel Diseases, Beijing, China. FAU - Zhou, Fan AU - Zhou F AD - Department of Ultrasound, The Third Medical Center of PLA General Hospital, Beijing, China. FAU - Zheng, Jianwei AU - Zheng J AD - Heart Center of Sunshine Union Hospital, Weifang, China. FAU - Bo, Ping AU - Bo P AD - Department of Cardiac Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart Lung and Blood Vessel Diseases, Beijing, China. FAU - You, Bin AU - You B AD - Department of Cardiac Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart Lung and Blood Vessel Diseases, Beijing, China. LA - eng PT - Journal Article PL - Netherlands TA - Biomed Mater Eng JT - Bio-medical materials and engineering JID - 9104021 SB - IM MH - Rats MH - Animals MH - Myocytes, Cardiac MH - Coculture Techniques MH - Animals, Newborn MH - Bone Marrow Cells/metabolism MH - Cell Differentiation/physiology MH - *Mesenchymal Stem Cells MH - Cells, Cultured MH - *Myocardial Infarction OTO - NOTNLM OT - DiI labeling in vitro OT - Stem cell therapy OT - bone marrow mesenchymal stem cells OT - cardiomyocytes OT - contact co-culture EDAT- 2022/12/12 06:00 MHDA- 2023/07/11 06:41 CRDT- 2022/12/11 04:42 PHST- 2023/07/11 06:41 [medline] PHST- 2022/12/12 06:00 [pubmed] PHST- 2022/12/11 04:42 [entrez] AID - BME221429 [pii] AID - 10.3233/BME-221429 [doi] PST - ppublish SO - Biomed Mater Eng. 2023;34(4):319-330. doi: 10.3233/BME-221429.