Autologous Transplantation of Bone Marrow Cells Improves Damaged Heart Function

作者：Shinji Tomita, Ren‐Ke Li, Richard D. Weisel, Donald A.G. Mickle, Eung-Joong Kim, Tetsuro Sakai, Zhiqiang Jia · 发表于：Circulation · 年份：1999 · DOI：10.1161/circ.100.suppl_2.ii-247 · 被引用次数：315 · 研究领域：Mesenchymal stem cell research、Tissue Engineering and Regenerative Medicine、Electrospun Nanofibers in Biomedical Applications

Background —Autologous bone marrow cells (BMCs) transplanted into ventricular scar tissue may differentiate into cardiomyocytes and restore myocardial function. This study evaluated cardiomyogenic differentiation of BMCs, their survival in myocardial scar tissue, and the effect of the implanted cells on heart function. Methods and Results —In vitro studies: BMCs from adult rats were cultured in cell culture medium (control) and medium with 5-azacytidine (5-aza, 10 μmol/L), TGFβ1 (10ng/mL), or insulin (1 nmol/L) (n=6, each group). Only BMCs cultured with 5-aza formed myotubules which stained positively for troponin I and myosin heavy chain. In vivo studies: a cryoinjury-derived scar was formed in the left ventricular free wall. At 3 weeks after injury, fresh BMCs (n=9), cultured BMCs (n=9), 5-aza–induced BMCs (n=12), and medium (control, n=12) were autologously transplanted into the scar. Heart function was measured at 8 weeks after myocardial injury. Cardiac-like muscle cells which stained positively for myosin heavy chain and troponin I were observed in the scar tissue of the 3 groups of BMC transplanted hearts. Only the 5-aza–treated BMC transplanted hearts had systolic and developed pressures which were higher ( P <0.05) than that of the control hearts. All transplanted BMCs induced angiogenesis in the scar. Conclusions —Transplantation of BMCs induced angiogenesis. BMCs cultured with 5-aza differentiated into cardiac-like muscle cells in culture and in vivo in ventricular...