Hwai-Shi Wang

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The Wharton's jelly of the umbilical cord contains mucoid connective tissue and fibroblast-like cells. Using flow cytometric analysis, we found that mesenchymal cells isolated from the umbilical cord express matrix receptors (CD44, CD105) and integrin markers (CD29, CD51) but not hematopoietic lineage markers (CD34, CD45). Interestingly, these cells also(More)
Diabetes mellitus can be treated with islet transplantation, although there is a scarcity of donors. This study investigated whether human mesenchymal stem cells (MSCs) from umbilical cord stroma could be induced to differentiate into insulin-producing cells and the effects of retro-orbital injection of human insulin-producing cells for the treatment of(More)
Astrocytes play a crucial role in maintaining the homeostasis of the brain. Changes to gap junctional intercellular communication (GJIC) in astrocytes and excessive inflammation may trigger brain damage and neurodegenerative diseases. In this study, we investigated the effect of lipopolysaccharide (LPS) on connexin43 (Cx43) gap junctions in rat primary(More)
CD44, a widely expressed cell surface glycoprotein, plays a major role in cell-cell adhesion, cell-substrate interaction, lymphocyte homing, and tumor metastasis. For tumor metastasis to occur through the blood vessel and lymphatic vessel pathway, the tumor cells must first adhere to endothelial cells. Recent studies have shown that high expression of CD44(More)
Osteoarthritis (OA) is characterized by degradation of the cartilage matrix, leading to pathologic changes in the joints. However, the pathogenic effects of synovial tissue inflammation on OA knees are not clear. To investigate whether the inflammation caused by the medial plica is involved in the pathogenesis of osteoarthritis, we examined the expression(More)
We studied the process of trans-differentiation of human bone marrow mesenchymal stem cells (hBM-MSCs) into insulin-producing cells. Streptozotocin (STZ)-induced diabetic rat model was used to study the effect of portal vein transplantation of these insulin-producing cells on blood sugar levels. The BM-MSCs were differentiated into insulin-producing cells(More)
CD44 plays a major role in multiple physiological processes, including cell-cell adhesion, cell-substrate interaction, lymphocyte homing, and tumor metastasis. It has been reported that highly expressed CD44 in certain types of tumors is associated with the hematogenic spread of tumor cells. The ability of CD44 to bind hyaluronan has been shown to correlate(More)
Although diabetes mellitus (DM) can be treated with islet transplantation, a scarcity of donors limits the utility of this technique. This study investigated whether human mesenchymal stem cells (MSCs) from umbilical cord could be induced efficiently to differentiate into insulin-producing cells. Secondly, we evaluated the effect of portal vein(More)
AIMS The severity of cartilage degeneration is positively correlated with the severity of the pathologic change of medial plica. However, knowledge of the pathogenic mechanisms and the impact of plica on cartilage destruction is limited. The aim of the present study was therefore to investigate matrix metalloprotease-3 (MMP-3) expression in the plica(More)
Cdk5 is a member of the cyclin-dependent kinase family, which is expressed predominantly in terminally differentiated neurons. Lower levels of Cdk5 are also found in a wide variety of cell types, including the lens. Although Cdk5 has been shown to play an important role in neuronal migration and neurite outgrowth, its function in non-neuronal cells is not(More)