Transplantation of cryopreserved cardiomyocytes

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Presentation transcript:

Transplantation of cryopreserved cardiomyocytes Hiroki Yokomuro, MD, Ren-Ke Li, MD, PhD, Donald A.G. Mickle, MD, Richard D. Weisel, MD, Subodh Verma, MD, PhD, Terrence M. Yau, MD, MSc The Journal of Thoracic and Cardiovascular Surgery Volume 121, Issue 1, Pages 98-107 (January 2001) DOI: 10.1067/mtc.2001.111418 Copyright © 2001 American Association for Thoracic Surgery Terms and Conditions

Fig. 1 A, The effects of 1, 2, and 4 weeks of cryopreservation on cell number 10 days after thawing. The control group represents the noncryopreserved cells. Results are presented as mean ± SE (*P = .004, control different from 1-, 2-, and 4-week values). B, The effects of 1, 2, and 4 weeks of cryopreservation on the percentage of beating cells 10 days after thawing. The control group represents the noncryopreserved cells. Results are presented as mean ± SE (*P = .01, control different from 1-, 2-, and 4-week values). C, The effects of 1, 2, and 4 weeks of cryopreservation on the beating rate 10 days after thawing. The control group represents the noncryopreserved cells. Results are presented as mean ± SE (P > .05, no difference between groups). D, The effects of 1, 2, and 4 weeks of cryopreservation on the percentage of irregularly beating cells 10 days after thawing. The control group represents the noncryopreserved cells. Results are presented as mean ± SE (P > .05, no difference between groups). The Journal of Thoracic and Cardiovascular Surgery 2001 121, 98-107DOI: (10.1067/mtc.2001.111418) Copyright © 2001 American Association for Thoracic Surgery Terms and Conditions

Fig. 2 Effects of cryopreservation of fetal rat myocardial tissue on the percentage of cultured beating cardiomyocytes. Fetal rat myocardial tissue was minced to 3 sizes before cryopreservation (0.2 mm3, 2.0 mm3, and 6.0 mm3) and cryopreserved for 1 week. After cryopreservation, cultured cardiomyocytes were isolated and cultured and the percentage of beating cells recorded in the 3 groups. Data are expressed as mean ± SE. #P = .008, different from groups 2 and 3. @P = .005, different from groups 1 and 2. *P = .005, different from group 3. The Journal of Thoracic and Cardiovascular Surgery 2001 121, 98-107DOI: (10.1067/mtc.2001.111418) Copyright © 2001 American Association for Thoracic Surgery Terms and Conditions

Fig. 3 A, Fetal cardiomyocyte suspension being injected into the subcutaneous tissue of an adult rat hind limb. B, Contractile cardiomyocyte transplant (A) 4 weeks after the implantation. Successful transplantation into the subcutaneous tissue is depicted (dimensions: 14 × 4 mm2). The Journal of Thoracic and Cardiovascular Surgery 2001 121, 98-107DOI: (10.1067/mtc.2001.111418) Copyright © 2001 American Association for Thoracic Surgery Terms and Conditions

Fig. 4 A, Electrocardiogram of the host rat heart. The heart rate was 219 beats/min. B, Electrical activity of the fetal cardiomyocyte transplant formed in the subcutaneous tissue of the adult rat hind limb 4 weeks after transplantation of cryopreserved fetal cardiomyocytes. The tissue beats at 60 beats/min with an idioventricular rhythm. The Journal of Thoracic and Cardiovascular Surgery 2001 121, 98-107DOI: (10.1067/mtc.2001.111418) Copyright © 2001 American Association for Thoracic Surgery Terms and Conditions

Fig. 5 Hematoxylin and eosin photomicrograph (100×) of fetal heart cell transplantation into the rat hind limb subcutaneous tissue. A, The 4-week-old transplant formed from a cryopreserved cardiomyocyte suspension. B, The 4-week-old transplant formed from a noncryopreserved cardiomyocyte suspension. Evidence of immunologic rejection is present. L, lymphocytes; TM, transplant muscle; M, host muscle. The Journal of Thoracic and Cardiovascular Surgery 2001 121, 98-107DOI: (10.1067/mtc.2001.111418) Copyright © 2001 American Association for Thoracic Surgery Terms and Conditions

Fig. 6 Photomicrographs of a 4-week-old fetal cardiomyocyte transplant in adult rat myocardial scar tissue. A, Arrows point to the transplant in the scar tissue of the left ventricular free wall. B, Hematoxylin and eosin stain of the transmural scar with transplant infiltrated with lymphocytes indicative of immunorejection (40×). C, Some cardiomyocytes labeled with BrdU were transplanted and identified in the transplant as indicated by the arrows (400×). TM, Transplant muscle. The Journal of Thoracic and Cardiovascular Surgery 2001 121, 98-107DOI: (10.1067/mtc.2001.111418) Copyright © 2001 American Association for Thoracic Surgery Terms and Conditions