Regeneration of the infarcted heart with stem cells derived by nuclear transplantation Journal Article
| Authors: | Lanza, R.; Moore, M. A. S.; Wakayama, T.; Perry, A. C. F.; Shieh, J.H.; Hendrikx, J.; Leri, A.; Chimenti, S.; Monsen, A.; Nurzynska, D.; West, M. D.; Kajstura, J.; Anversa, P. |
| Article Title: | Regeneration of the infarcted heart with stem cells derived by nuclear transplantation |
| Abstract: | Nuclear transfer techniques have been proposed as a strategy for generating an unlimited supply of rejuvenated and histocompatible stem cells for the treatment of cardiac diseases. For this purpose, c-kit-positive fetal liver stem cells obtained from cloned embryos were injected in the border zone of infarcted mice to induce tissue reconstitution. Cloned embryos were derived from somatic cell fusion between nuclei of cultured LacZ-positive fibroblasts and enucleated oocytes of a different mouse strain. We report that regenerating myocardium replaced 38% of the scar at 1 month. The rebuilt tissue expressed LacZ and was composed of myocytes and vessels connected with the coronary circulation. Myocytes were functionally competent and expressed contractile proteins, desmin, connexin43, and N-cadherin. These structural characteristics indicated that the new myocytes were electrically and mechanically coupled. Similarly, the formed coronary arterioles and capillary structures contained blood and contributed, therefore, to tissue oxygenation. Cardiac replacement resulted in an improvement of ventricular hemodynamics and in a reduction of diastolic wall stress. These beneficial effects were obtained by stem cell transdifferentiation and commitment to the cardiac cell lineages. Myocardial growth was independent from fusion of the injected stem cells with preexisting partner cells. In conclusion, c-kit-positive stem cells derived by nuclear transfer cloning restore infarcted myocardium. Although problems currently plague nuclear transplantation, including the potential for epigenetic and imprinting abnormalities, stem cells derived from cloned embryos are sufficiently normal to repair damaged tissue in vivo. Importantly, the magnitude of myocardial regeneration obtained in this study is significantly superior to that achieved with adult bone marrow cells. |
| Keywords: | controlled study; nonhuman; animal cell; oocyte; animals; mice; oocytes; animal tissue; cell division; somatic cell; stem cell factor receptor; proto-oncogene proteins c-kit; embryo; animal experiment; animal model; tissue regeneration; stem cell transplantation; in vivo study; cell differentiation; capillary; cell lineage; stem cell; regeneration; blood; liver; epigenetics; heart infarction; nerve cell adhesion molecule; beta galactosidase; fibroblast; fibroblasts; stress; cell size; genes, reporter; fetus; bone marrow cell; mouse strain; cell clone; neovascularization, physiologic; heart muscle cell; genome imprinting; clone cells; heart; hemodynamics; myocardial infarction; desmin; tissue oxygenation; cell fusion; injections; lac operon; connexin 43; myocytes, cardiac; coronary artery blood flow; cell nucleus transplantation; cloning, organism; nuclear transfer techniques; heart ventricle wall; heart contraction; male; female; priority journal; article; cardiac repair; cardiomyocytes; fetal stem cells; new coronary arterioles; arteriole; heart blood vessel; heart ventricle; fetal tissue transplantation |
| Journal Title: | Circulation Research |
| Volume: | 94 |
| Issue: | 6 |
| ISSN: | 0009-7330 |
| Publisher: | Lippincott Williams & Wilkins |
| Date Published: | 2004-04-01 |
| Start Page: | 820 |
| End Page: | 827 |
| Language: | English |
| DOI: | 10.1161/01.res.0000120863.53562.df |
| PROVIDER: | scopus |
| PUBMED: | 14764454 |
| DOI/URL: | |
| Notes: | Circ. Res. -- Cited By (since 1996):77 -- Export Date: 16 June 2014 -- CODEN: CIRUA -- Source: Scopus |
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