Sebastian Gehmert

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Emerging evidence suggests that adipose tissue-derived stem cells (ASCs) can be used for the treatment of ischemic heart diseases. However, the mechanisms underlying their therapeutic effects have not been clearly defined. In this study cytokines released by ASCs were detected by ELISA and pro-angiogenic effects were assessed by tube formation assay. To(More)
Cardiomyocyte regeneration is limited in adult life and is not sufficient to compensate for cell loss with myocardial infarction. Hence, the identification of a useful source of cardiomyocyte progenitors is of great interest for possible use in regenerative therapy. In this study, we isolated stem cells derived from human subcutaneous adipose tissue. The(More)
BACKGROUND INFORMATION Although MSCs (mesenchymal stem cells) and fibroblasts have been well studied, differences between these two cell types are not fully understood. We therefore comparatively analysed antigen and gene profiles, colony-forming ability and differentiation potential of four human cell types in vitro: commercially available skin-derived(More)
Meniscal tears in the avascular zone have a poor self-healing potential, however partial meniscectomy predisposes the knee for early osteoarthritis. Tissue engineering with mesenchymal stem cells and a hyaluronan collagen based scaffold is a promising approach to repair meniscal tears in the avascular zone. 4 mm longitudinal meniscal tears in the avascular(More)
Particular alleles of the interleukin-1B (IL-1B) gene have been correlated with increased risk of atrophic gastritis and gastric cancer in the populations of East Asia and Europe. No such data exist from Peru, a developing country with a population genotypically different from others studied and with a high prevalence of Helicobacter pylori infection and(More)
The prognosis of patients suffering from pancreatic cancer is still poor and novel therapeutic options are urgently needed. Recently, the transcription factor signal transducer and activator of transcription 5b (STAT5b) was associated with tumor progression in human solid cancer. Hence, we assessed whether STAT5b might serve as an anticancer target in(More)
Recent evidence indicates that mesenchymal stem cells contribute to tumor angiogenesis through yet undefined mechanisms. In the present study, we investigated the angiogenic properties of human adipose tissue-derived stem cells and the mechanisms involved. Freshly isolated human adipose tissue-derived stem cells were seeded onto wells coated with Matrigel(More)
Clinical application of platelet-rich plasma (PRP) and stem cells has become more and more important in regenerative medicine during the last decade. However, differences in PRP preparations may contribute to variable PRP compositions with unpredictable effects on a cellular level. In the present study, we modified the centrifugation settings in order to(More)
Recently, it was shown that mesenchymal stem cells (MSCs) are capable of differentiating into endothelial cells which highlights the potential role of MSCs in neovascularization. In the present study, we investigated the paracrine factors responsible for tube formation in human adipose-tissue derived stem cells (ASCs). Moreover, we analyzed ASC's migration(More)
The origin of vascular cells in tumors is unknown, but it is believed that tumors use cells from the host to build new vessels. To determine whether adipose tissue stem cells (ASCs) could be attracted by cancer cells, we performed migration assays in which ASCs were seeded on a transwell migration system top chamber and tumor-conditioned medium was placed(More)