333 results about "Snake venom" patented technology

The invention relates to the field of biological medicine, and particularly provides a selective TNFR1 antagonist peptide Hydrostatin-SN10 derived from snake venom of hydrophis cyanocinctus. The selective TNFR1 antagonist peptide Hydrostatin-SN10 has an amino acid sequence shown in an SEQ ID NO:2. The invention further provides a selective TNFR1 antagonist peptide PEG-SN10 based on mPEG-2000 modification. Selective modification is achieved through covalent linkages between a carboxyl group of mPEG-2000 and a free amino group of aspartic acid at a N-terminal of a peptide chain Hydrostatin-SN10. Meanwhile, application of the selective TNFR1 antagonist peptides Hydrostatin-SN10 and PEG-SN10 in preventing and treating rheumatoid arthritis is provided.

The invention discloses a method for refining a polyvalent ASV (anti-snake venom) lyophilized serum, pertaining to an immune serum containing antibody which aims at least two kinds of antigens. The serum takes the venom of Ancistrodon acutus, Agkistrodon halys, Pit-vipers, bamboo snakes, adders and the like as the immune antigen which is inoculated into the bodies of animals after degerming and dialysis, and then titer immune serum after purification is used for collecting the antibody which is then desalted and lyophilized; mice are used for evaluating the LD50 of the virulence of the venom and the titer of the ASV serum; the antibody inoculated into the bodies of the animals is one of the venom, toxoid or snake venom or the composition thereof, and glutaraldehyde or formaldehyde is used for toxin detoxication; before immunity, anti-tetanic toxoid condensed antibody for human beings is used for carrying out minim gradual immunization on the animals, or an Emuade adjuvant is used for immunization purpose. The polyvalent ASV lyophilized serum complies with the biological product standards upon the tests and inspections of purity and specific activity, safety, pyrogen, hypersusceptibility, dissolution and the like; moreover, the serum can cure sufferers who are bitten by vipers with the advantages of high purity, low foreign protein, easy preservation and quick dissolving capacity.

The invention relates to the inhibition of blood coagulation, especially during organ rejection, and in particular the inhibition of delayed vascular rejection. The invention provides anticoagulant proteins which are anchored to cell membranes. The anticoagulant function preferably provided by heparin, antithrombin, hirudin, TFPI, tick anticoagulant peptide, or a snake venom factor. These anticoagulant proteins are preferably prevented from being constitutively expressed at the cell surface. In particular, expression at the cell surface is regulated according to cell activation, for instance by targeting the protein to a suitable secretory granule. Expression of these proteins renders cells, tissues and organs less vulnerable to rejection after transplantation (e.g. after xenotransplantation).

Purified multivalent and lyophilized antivenin and a use method belong to antibody immunity serums that aim at more than two antigens. The invention aims at preparing the multivalent antivenin by a plurality of lyophilized antivenins and the use method. The invention is characterized in that: the antigen-binding fragment F(ab)2 has 60 to 80 percent of lyophilized antiserum, the unit is mg per person, 342.5 to 1035 of vipers, 1177 to 3182 of agkistrodon acutus, 456 to 666 of adders, 1419 to 2128 of king cobras, 220 to 331 of coral snakes, 880 to 1320 of gold banded kraits, 3188 to 4782 of cobras are combined; the optimized combination is as follows: 635 of vipers, 1959 of agkistrodon acutus, 561 of adders, 1774 of king cobras, 276 of coral snakes, 1100 of gold banded kraits and 3985 of cobras. Blood circulation snake venom antiserum and nerves snake venom antiserum are respectively filled and measured. The use method is as follows: the antivenin that is diluted by sodium chloride and an anti-allergic agent, such as chlorphenamine maleate, are injected into muscle or a vein. The antivenin is prepared by only seven antivenins, and can effectively and in time treat injuries caused by various poisonous snakes in our country when the antiserum is directly injected in condition of the undetermined variety of poisonous snakes, and the invention reaches the advanced world level of the antivenin.