Kit for detecting phosphorylated epidermal growth factor receptor and preparation method thereof
A technology of epidermal growth factor and kit, applied in the field of biomedicine, can solve the problems of cumbersome operation, low sensitivity, expensive instruments, etc., and achieve the effect of overcoming cumbersome operation and less specimen consumption
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Embodiment 1
[0029] Example 1: Preparation of a kit for detecting phosphorylated epidermal growth factor receptor.
[0030] In order to detect whether there is the corresponding phosphorylated epidermal growth factor in the sample, prepare the bottom membrane immobilized with specific antibodies against the following proteins: EGFR (Tyr845), EGFR (Tyr992), EGFR (Tyr1045), EGFR (Tyr1068), EGFR (Tyr1086), EGFR(Tyr1148), EGFR(Tyr1173), EGFR(Ser1046 / 1047), EGFR(Ser1070), ErbB2(Tyr877), ErbB2(Tyr1112), ErbB2(Tyr1221 / 1222), ErbB2(Tyr1248), ErbB2( Thr686), ErbB2 (Ser1113), ErbB3 (Tyr1289), ErbB4 (Tyr1284), the above-mentioned various specific antibodies are respectively fixed on the bottom membrane to form independent recognition sites.
[0031] 1. Antibody preparation:
[0032] Specific antibodies against the proteins listed in Table 1 were used, and the sources, batch numbers, and names of the proteins they targeted were detailed in Table 1:
[0033] Table 1 The name of the phosphorylated epi...
Embodiment 2
[0040] Embodiment 2: The experiment of using the kit of the present invention to detect phosphorylated epidermal growth factor receptor.
[0041] After recombinant human epidermal growth factor (rhEGF) stimulates human epithelial tumor cells (A431), the patent kit is used to detect the changes in the content of seventeen kinds of phosphorylated epidermal growth factor receptors in A431. After A431 cells were cultured at 37C, 5% CO2 for 2 to 3 days, the cell density reached about 80 to 90%. Replace the medium with low concentration of calf serum (0.2% FCS) and cultivate overnight. Stimulate with 100 μmg / ml rhEGF. Filter out the cell culture medium, and wash the cells on the wall of the culture dish with cold 1XPBS. Add cell lysate to make the cell number concentration about 2×10 7 Cell count / ml. Mix the cells thoroughly, transfer to a small centrifuge tube, and shake at 2-8°C for 30 minutes. Centrifuge at 4C for 10 minutes at 14,000 rpm, transfer the supernatant to a clean...
Embodiment 3
[0064] Embodiment 3: animal experiments
[0065] Nude mice were used as the experimental model in this experiment. Nude mice were first randomly divided into 4 groups. There are ten mice per group. The first group: control group (control), without any treatment on the mice; the second group: photodynamic therapy (PDT); the third group: cetuximab or Erbitux; the fourth group : photodynamic therapy and cetuximab drug therapy.
[0066] PDT therapy: first inject hypericin into nude mice. After 6 hours, halogen lamp irradiation (wavelength 560-640 nm) was carried out. Cetuximab drug therapy: nude mice were injected intraperitoneally with cetuximab (10 mg / kg). Inject once a day for 90 days. Mice were sacrificed when tumors grew to 2 cm3 or 90 days. Tumor tissue is harvested and disrupted with cell lysate. Then use the patent kit to test the tumor tissue.
[0067] Experimental results:
[0068] (1) Blank control group. The experimental results showed that the content of th...
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