AbstractBackground:There is growing evidence to suggest that cells in the maculae flavae are tissue stem cells of the human vocal fold and maculae flavae are a stem cell niche.Methods:Three newborn vocal folds were investigated. Immunoreactivity to antibodies directed to cytokeratin, desmin, glial fibrillary acidic protein, vimentin, cluster of differentiation 34, cluster of differentiation 45, collagen type I, telomerase reverse transcriptase, SOX17 and stage-specific embryonic antigen 3 was investigated.Results:The cells in the newborn maculae flavae expressed haematopoietic markers (cluster of differentiation 34, cluster of differentiation 45) and collagen type I, which are the major makers of bone marrow derived circulating fibrocytes. The cells expressed epithelium, muscle, neural and mesenchymal cell associated proteins, and endodermal marker, indicating that they are undifferentiated and express proteins of all three germ layers. The cells also expressed stage-specific embryonic antigen 3 and telomerase reverse transcriptase.Conclusion:The cells in the newborn maculae flavae are undifferentiated cells arising from the differentiation of bone marrow cells. The results of this study are consistent with the hypothesis that the cells in maculae flavae are tissue stem cells.
Amniotic fluid is a liquid that fills the amniotic cavity which has defense and nutritional functions in fetal development. Human aterm amniotic fluid can be an ideal alternative as a source of mesenchymal stem cells, originating from the neonate. Preclinical studies of second and third trimester amnion fluid cells confirmed the number of potential donors from this wasted material. In several studies, AF-MSCs express mesenchymal markers such as CD90, CD73 (SH3, SH), CD105 (SH2), CD29, CD166, CD49e, CD58 and CD44 (MHC class I). These cells also express HLA-ABC antigens, CD 34, CD 45 which are hematopoietic markers, and endothelial CD31 markers. There is no expression of CD10, CD11b, CD14, CD34, CD117, EMA and HLA-DR, DP, DQ antigens. Most of AF-MSCs have pluripotent properties which are characterized by the discovery of octamer binding protein 3/4 (Oct-3/4), transcription factors Nanog (Nanog), and stage-specific embryonic antigen 4 (SSEA-4) on RT-PCR examination. From this study, 8 million cells was isolated. These cells will be used for research on pelvic organ prolapse therapy by using AF-MSCs. AF-MSCs isolation totally takes 6 weeks. From 1 flask, 2 million of stem cells was obtained. Keywords: amniotic fluid, AF-MSCs
Cell-based therapies for ischemic cardiomyopathy : investigations of intramyocardial retention and safety of high dose intracoronary delivery of c-kit positive cardiac progenitor cells, and therapeutic utility of a novel population of cardiac mesenchymal stem cells expressing stage-specific embryonic antigen-3 (SSEA-3).