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Purushothama H.,Sri Raghavendra Biotechnologies Pvt. Ltd | Rao J.A.,Sri Raghavendra Biotechnologies Pvt. Ltd
International Journal of Stem Cells | Year: 2015

Background and Objectives: The purpose of this first of its kind study was to analyse the growth, development and attachment of cultured human umbilical cord stem cells alone or supplemented with basic Fibroblast Growth Factor (bFGF) on both healthy and periodontally diseased tooth surfaces in vitro. Methods: Four groups of 12 root surface scaffolds each were classified as Group I- healthy root surfaces; Group IIperiodontally diseased; Group III- Healthy with bFGF and Group IV- periodontally diseased root with bFGF. bFGF was applied in the concentration of 8 ng/ml on to the surface followed by incubation of cultured human umbilical cord stem cells (hUCMSCs) on the scaffolds .Scanning electron microscopy observations were made on 14th and 21st days to assess the proliferation and morphology of cells attached on the tooth surface. Results: Cultured hUCMSCs demonstrated adhesion to tooth root scaffold. All the groups showed a significant increase in the number of cell attachment from 14th day to 21st day. The groups with bFGF showed a significant increase in attachment of cells when compared to the groups without bFGF. The cells showed an increase in number of flat cells from 14th day to 21st day in all the groups indicating an increased maturity of cells. Periodontally diseased groups had less maturity of cells than healthy groups. The groups supplemented with bFGF, had more mature cells than the groups without bFGF. Conclusions: hUCMSCs have the propensity to differentiate into cells that have the capacity to bind to root surfaces. hUCMSCs incubated with bFGF showed better proliferation and attachment to tooth root surfaces. The role of hUCMSCs can be further explored for periodontal regeneration. Source

Boroujeni M.E.,Sri Raghavendra Biotechnologies Pvt. Ltd | Gowda P.,Sri Raghavendra Biotechnologies Pvt. Ltd | Johnson J.,Sri Raghavendra Biotechnologies Pvt. Ltd | Rao J.,Sri Raghavendra Biotechnologies Pvt. Ltd | Saremy S.,Sri Raghavendra Biotechnologies Pvt. Ltd
Asian Journal of Biochemistry | Year: 2012

Bone marrow derived-Human Mesenchymal stem cells (hMSCs) are non-hematopoetic, stromal cells that demonstrate multilineage differentiation capacity and being capable to give rise to diverse tissues, including bone and cartilage. Due to this capability, hMSCs are currently evaluated for regenerative medicine, repopulating injured tissues and clinically ablated diseased tissues with healthy, terminally differentiated cells. Thus, for therapeutic applications, enough numbers of homogenous MSCs are required. In this study, the population doubling of bone marrow derived hMSCs was assessed in early and late passages. It was noted that in healthy cells, generally, the population doubling increases over time due to the slower rate of cell growth. Subsequently, the mesengenic multipotency of BM-MSCs for chondrogenesis, osteogenesis and adipogenesis was investigated in early and late doublings. According to our findings, the early passage hMSCs treated with the differentiation agents exhibited approximately 100, 48±10.33 and 28.6±6.62% osteocytes, chondrocytes and adipocytes, respectively. Whereas, the late passage hMSCs subjected to the differentiation agents only demonstrated the high degree of osteogenicity but they revealed neither chondrogenicity nor adipogenicity. Furthermore, the Expression of Oct4, Sox2 and Nanog genes in undifferentiated human BM-derived MSCs was studied. The result revealed the Oct4 is expressed at very low levels in early passage MSCs and disappeared at late passage however Nanog and Sox2 were almost undetected in MSCs. In conclusion, the proliferation rates and other properties of the cells gradually change during expansion and therefore, it is recommended to not expand hMSCs beyond four or five passages. © 2012 Academic Journals Inc. Source

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