Matrix metallo-proteinase inhibitor polypeptide and application thereof
A technology of polypeptide sequence and blood vessel inhibition, which is applied in the field of disease treatment and angiogenesis inhibitors, and can solve problems such as insufficient dosage, irregular medication, persistent and unrelieved symptoms, etc.
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Embodiment 1
[0043] Inhibition of several target enzymes by angiogenesis inhibitors.
[0044] Experimental method: recombinant human matrix metalloproteinase-9 [purchased from R&D Systems, USA]. The concentration of matrix metalloproteinase-9 was 92 ng / μL (1 μM). Enzyme activity is detected by cleaving the fluorescently generated peptide substrate Mca-Pro-Leu-Gly-Leu-Dpa-Ala-Arg-NH 2 [Purchased from R&D Systems, USA] and detected the generated fluorescence values (excitation wavelength = 328nm, detection wavelength = 392nm). All detections were carried out in 100μL reaction system at 37°C.
[0045] The detection of recombinant human matrix metalloproteinase-8 [purchased from Sino Biotechnology Inc., China] is similar to the detection of matrix metalloproteinase-9 and uses the same fluorescent substrate. The reaction was also carried out in a 100 μL reaction system at 37°C. Add 20 μL of recombinant human matrix metalloproteinase-8 (2 ng / μL) to the reaction system during detection. The ...
Embodiment 2
[0053] Migration Inhibition Test of Human Umbilical Vein Endothelial Cells (HUVEC) by Angiogenesis Inhibitor Peptides
[0054] 10 mg / ml Matrigel (BD Company, USA) was diluted 1:2 with HUVEC-specific medium, spread on the transwell chamber membrane, and air-dried at room temperature. The HUVEC cells cultured to the logarithmic growth phase were digested, collected, counted, and the cell concentration was adjusted to 1×10 5 individual / mL. The cells were inoculated into the transwell chamber, 100 μL per well, and each group of test liquid was added into the chamber. Add 0.6 mL of endothelial cell culture medium containing 5% fetal bovine serum and 1% ECGS to the 24-well plate to stimulate cell migration, and place in 5% CO 2 , and cultivated at 37°C for 24h. The culture medium in the well was discarded, the cells were fixed, stained, rinsed with clean water, observed under a microscope and selected four fields of view to take pictures and count. Calculate the migration inhibi...
Embodiment 3
[0062] Angiogenesis Inhibitor Polypeptides Inhibit Growth of Melanoma B16F10C57BL / 6 Transplanted Tumors in Black Mice
[0063] Mice were purchased from Shanghai Slack Experimental Animal Co., Ltd. Cultivate B16F10 cells in vitro, when the cells grow to 90% full, collect the cells with trypsin, and prepare 5×10 6 cells / mL of cell suspension. Inoculate 0.1 mL of cell suspension subcutaneously on the right side of the mouse, and the tumor volume reaches 100 mm in about 7 days 3 . The tumor tissues in the vigorous growth period were taken and ground under sterile conditions, and prepared into 1×10 7 Cell suspension per ml was inoculated subcutaneously in the right axillary of mice with 0.1 mL. Use a vernier caliper to measure the diameter of the transplanted tumor in mice, and wait until the tumor grows to 100-200mm 3 Animals were then randomly grouped. Using the method of measuring the diameter of the tumor, dynamically observe the inhibitory effect of the integrin blocking...
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