他克莫司 T2144

Product Introduction
Bioactivity


英文名: Tacrolimus

描述: Tacrolimus (Fujimycin) 可与 FKBP12 结合形成高亲和力复合物 (Ki: 0.2 nM)，抑制钙/钙调蛋白依赖性蛋白磷酸酶的活性。

细胞实验: Tumor cell proliferation was determined by the MTT. Briefly, after MH3924A cells had reached the logarithmic growth phase, a 0.2-ml cell suspension at 1×10^4 cells/ml was added into each well of a 96-well plate and cultured in DMEM with 10% FBS, 10 μg/l vascular endothelial growth factor and 0.1 g/l heparin for 24 h. When adherent growth was established, different concentrations of FK506 (10, 100 and 1,000 μg/l), AMD3100 (10, 50 and 100 μg/l) and FK506 (0 and 100 μg/l) + AMD3100 (0, 10, 50 and 100 μg/l) were added into the plates. Untreated cells cultured in medium alone were used as controls. After culturing for 48 h, 10 μl MTT (5 g/l) was added, and each well was incubated for 6 h; next, 150 μl/well dimethyl sulfoxide was added, followed by measurements of the absorbance at 570 mm on a spectrophotometer reader. Each well was measured three times, and each sample was assayed in triplicate [2].

动物实验: Experiments were performed in 16 healthy August Copenhagen Irish rats (male, 16–20 weeks, weighing 240–300 g). The rat model of liver tumor was established as follows: First, MH3924A cells were collected and injected into the alar skin of rats. The tumors were removed from alar skin when grown to 2×1×1 mm3, and intrahepatic tumor implantation of rats was performed under aseptic conditions as described previously (25,26). Five days later, rats were randomly divided into two groups: one group was subcutaneously injected with normal saline for 14 days (NS group, n=8, 3 mg/kg/day), and the second group was subcutaneously injected with FK506 for 14 days (FK506 group, n=8, 0.3 mg/kg/day). Forty days following implantation, rats were sacrificed, and the weight of tumor, the volume of the fluid in the ascites, the incidence of lymphatic metastasis in the abdominal cavity and of abdominal wall metastasis were measured. In addition, the lungs were irrigated with 15% Indian ink, followed by counting of the number of metastatic nodules in the lung. The tumor and adjacent tissues, as well as healthy liver tissues, were harvested and preserved in 4% formalin for later use [2].

体外活性: FKBP12 was first isolated from the cytosol of Jurkat T cells, as an abundant, high-affinity receptor for Tacrolimus (FK506; Kd: 0.2 nM) [1]. FK506 (100?1,000 μg/l) significantly promoted the proliferation of MH3924A cells. The invasiveness of MH3924A cells was significantly enhanced following treatment with FK506 [2]. FK506 specifically inhibits cellular calcineurin at drug concentrations that inhibit interleukin 2 productions in activated T cells [3].

体内活性: The liver of rats of the normal saline (NS) group was large, with an average weight at 15.56±11.17 g, and the liver of rats of the FK506 group was oversize, with an average weight at 28.19±3.89 g. The rate of lymph node metastasis, as well as the number of pulmonary nodules, were significantly increased in the FK506 compared to the NS group [2]. Behavioral pain assessment revealed an increase in the paw and tail withdrawal threshold in tacrolimus-treated groups against hyperalgesic and allodynic stimuli as compared to the sham control group [4].

存储条件: Powder: -20°C for 3 years | In solvent: -80°C for 1 year

溶解度: Ethanol : 80.4 mg/mL (100 mM)
DMSO : 45 mg/mL (55.97 mM)


关键字: FKBP | FK506-binding protein | Inhibitor | Phosphatase | Bacterial | FR-900506 | Antibiotic | FK 506 | FK-506 | inhibit | FR 900506 | Tacrolimus | Autophagy

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