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تعداد نتایج: 3598847 فیلتر نتایج به سال:
Objective(s):N-myc downstream regulated gene 2 (NDRG2) is a candidate gene for tumor suppression. The expression of NDRG2 is down-regulated in several tumors including lung cancer. The aim of this study was to explore the effect of NDRG2 overexpression on invasion, migration, and enzymatic activity of matrix metalloproteinase-2 (MMP-2) and -9 (MMP-9) in human lung adenocarcinoma A549 cells. Ma...
we have previously shown that the proliferative response of t cells to antigenic or mitogenic stimulus decreased with age and that caloric resection (cr) attenuated the age-related decline in proliferation and il-2 expression. because activation-induced apoptosis is known to regulate cell proliferation and eliminate the high number of activated cells during an immune response, it was of interes...
Many investigators have used xenogeneic, especially murine stromal cells and fetal calf serum to maintain and expand human stem cells. The proliferation and expansion of human hematopoietic stem cells in ex vivo culture were examined with the goal of generating a suitable protocol for expanding hematopoietic stem cells for patient transplantation. Using primary fetal liver cells, we established...
Background: Mesenchymal stem cells (MSCs), also known as mesenchymal stromal cells, are considered as an important source of adult stem cells in tissue engineering and cell therapy. They are present in various tissues such as, endometrium as the supportive cells. According to anatomical position of endometrial mesenchymal stem cells that put them in neighborhood of the fetus, they m...
cancer cell-stromal cell interaction plays a crucial role in the growth and invasion of tumor cells of various organs. it has been recently suggested that adipocytes and preadipocytes, two specific types of stromal cells, affect the biological behavior of variety of breast cancer cell lines. in spite of few investigations, there is a controversy in the literatures about the effects of adipocyte...
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