Myocardial tissue engineering with autologous myoblast implantation

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Presentation transcript:

Myocardial tissue engineering with autologous myoblast implantation Julia Dorfman, MD, Minh Duong, BSc, Audrius Zibaitis, MSc, MD, Marc P. Pelletier, MD, Dominique Shum-Tim, MD, Carlos Li, MD, Ray C.-J. Chiu, MD, PhD The Journal of Thoracic and Cardiovascular Surgery Volume 116, Issue 5, Pages 744-751 (November 1998) DOI: 10.1016/S0022-5223(98)00451-6 Copyright © 1998 Mosby, Inc. Terms and Conditions

Fig 1 Cultured satellite cells stained with DAPI. Note that virtually 100% of the cultured cells are labeled. The Journal of Thoracic and Cardiovascular Surgery 1998 116, 744-751DOI: (10.1016/S0022-5223(98)00451-6) Copyright © 1998 Mosby, Inc. Terms and Conditions

Fig 2 Labeled cells within the host myocardium 1 week after satellite cell implantation. Note undifferentiated appearance of the cells. Location within the myocardium most likely corresponds to the implant site. The Journal of Thoracic and Cardiovascular Surgery 1998 116, 744-751DOI: (10.1016/S0022-5223(98)00451-6) Copyright © 1998 Mosby, Inc. Terms and Conditions

Fig 3 Labeled muscle fibers within host myocardium 1 week after satellite cell implantation. Four fluorescent cells are found clustered together but are interspersed by an unlabeled (host) myocyte. Fluorescent cells have the same structure as the surrounding native myocytes. Similar findings were obtained 4 weeks after satellite cell implantation. The Journal of Thoracic and Cardiovascular Surgery 1998 116, 744-751DOI: (10.1016/S0022-5223(98)00451-6) Copyright © 1998 Mosby, Inc. Terms and Conditions

Fig 4 Histologic study of tissue found at the implantation site, after auto-implantation of canine satellite cells into the myocardial cryolesion. The arrow points to an intercalated disk unique to cardiac myofibers. (From Chiu RC-J, Zibaitis A, Kao RL. Cellular cardiomyoplasty: myocardial regeneration with satellite cell implantation. Reprinted with permission from the Society of Thoracic Surgeons, The Annals of Thoracic Surgery 1995;60:12-8 [Fig 4]). The Journal of Thoracic and Cardiovascular Surgery 1998 116, 744-751DOI: (10.1016/S0022-5223(98)00451-6) Copyright © 1998 Mosby, Inc. Terms and Conditions

Fig 5 Implanted satellite cells encoded with the lacZ reporter gene; note β-galactosidase activity at the implant site within the myocardium. (From Chiu RC-J, Zibaitis A, Kao RL. Cellular cardiomyoplasty: myocardial regeneration with satellite cell implantation. Reprinted with permission from the Society of Thoracic Surgeons, The Annals of Thoracic Surgery 1995;60:12-8 [Fig 6]). The Journal of Thoracic and Cardiovascular Surgery 1998 116, 744-751DOI: (10.1016/S0022-5223(98)00451-6) Copyright © 1998 Mosby, Inc. Terms and Conditions

Fig 6 Direct injection of DAPI solution into a muscle tissue in vivo failed to show uptake of DAPI fluorescence in a specimen obtained 1 week after injection. The Journal of Thoracic and Cardiovascular Surgery 1998 116, 744-751DOI: (10.1016/S0022-5223(98)00451-6) Copyright © 1998 Mosby, Inc. Terms and Conditions

Fig 7 Satellite cells labeled in vitro with DAPI while in culture were implanted in the skeletal muscle of the isogenic rats. This specimen obtained 4 weeks later demonstrates labeled nuclei that are characterized by their spindle shape and located peripherally in a multinuclear muscle fiber, characteristic of the skeletal muscle fiber structure. The Journal of Thoracic and Cardiovascular Surgery 1998 116, 744-751DOI: (10.1016/S0022-5223(98)00451-6) Copyright © 1998 Mosby, Inc. Terms and Conditions