Apoptosis in human being acute myocardial infarction
Apoptosis in human being acute myocardial infarction. necrotic death of isolated myocytes in vitro, but lower doses did not induce myocyte death or impact inotropy. Histological analysis documented improved myocyte cross-sectional area despite smaller heart sizes following sorafenib treatment, further suggesting myocyte loss. Sorafenib caused apoptotic cell death of cardiac- and bone-derived c-kit+ stem cells in vitro and decreased the number of BrdU+ myocytes recognized in the infarct border zone in fixed tissues. Sorafenib experienced no effect on infarct size, fibrosis or post-MI neovascularization. When sorafenib-treated animals received metoprolol treatment post-MI, the sorafenib-induced increase in post MI mortality was eliminated, cardiac function was improved, and myocyte loss was ameliorated. Conclusions Sorafenib cardiotoxicity results from myocyte necrosis rather than from any direct effect on myocyte function. Surviving myocytes undergo pathological hypertrophy. Inhibition of c-kit+ stem cell proliferation by inducing apoptosis exacerbates damage by reducing endogenous cardiac restoration. In the establishing of…
HPDSCs contain a significantly greater amount of CD34+ hematopoietic stem/progenitor cells compared with donor\matched UCB (Fig
HPDSCs contain a significantly greater amount of CD34+ hematopoietic stem/progenitor cells compared with donor\matched UCB (Fig. Radnor, PA) was collected from each placenta. After reddish blood cell depletion using Hetastarch and volume reduction, the cells were cryopreserved in a solution containing 5% human albumin and 10% dimethyl sulfoxide with a controlled rate freezer prior to final storage in the gas phase of a liquid nitrogen tank. Viability of the HPDSCs was decided using 7\aminoactinomycin D (BD Bioscience, San Jose, CA) by circulation cytometry. Colony Forming Cell (CFU) Assay CD34+ cells were selected from HPDSCs with a human CD34 positive selection kit and isolated using automated cell separator RoboSep (StemCell Technologies, Inc., Vancouver, Canada). The CFU assay was performed using MethoCult, following the manufacturer’s protocol (StemCell Technologies, Inc.). Briefly, CD34+ cells were mixed with total MethoCult medium supplemented with stem cell factor, granulocyte colony\stimulating factor, granulocyte\macrophage colony\stimulating factor (GM\CSF), interleukin 3,…
Non-classical monocytes are reported to arise by conversion of classical monocytes in the mouse
Non-classical monocytes are reported to arise by conversion of classical monocytes in the mouse. CD303 and CD304. Although not related directly to plasma cells they retain subtle lymphoid features and unique secretory properties. Homologues are recognized in many species. CD14+ DCs found in tissues and lymph nodes are a third subset of CD11c+ myeloid cells originally described as interstitial DCs. They are more monocyte-like or macrophage-like than CD1c+ and CD141+ mDCs and may arise from classical monocytes. Equivalent ARHGAP26 cells have recently been found in mice as a new monocyte-derived subset of CD11b classical DCs that expresses or ESAM. Langerhans cells (LCs) and microglia are two specialized self-renewing DC populations found in stratified squamous epithelium and parenchyma of the brain, respectively. The LCs are capable of differentiating into migratory DCs whereas microglia are considered as a type of macrophage by many authors. Recent reviews provide excellent summaries of microglia and…