104 results about "Swine origin" patented technology

The invention provides use of a compound shown as formula Ia or a prodrug thereof in preparation of drugs for the prevention and/ or treatment of Tamiflu resistant influenza viruses strain infection, a Tamiflu resistant influenza viruses strain is preferably H1N1 Swine-origin influenza A virus H274Y. The invention also provides a method for the treatment, prevention or delay of virus infection caused by the Tamiflu resistant influenza viruses strain, and the method comprises administering of a therapeutically effective amount of the compound or the prodrug thereof to patients needing the treatment.

The invention provides a novel pig-source antibacterial peptide mutant, a preparation method and an application thereof. According to the invention, the spatial structure analysis is preformed on the amino acid sequence of pig-source antibacterial peptide PMAP37 through biology software and three amino acids (L6K, K20L and L31K) of the thirty-seven amino acids are mutated, so that the novel pig-source antibacterial peptide mutant is acquired and the antibacterial effect is obviously increased. On the basis, a pichia pastoris biased codon is selected and a novel pig-source antibacterial peptide mutant gene is artificially synthesized and is cloned in expression of the pichia pastoris, so that a novel antimicrobial peptide recombined yeast strain is acquired, the fermentation scale is amplified to the fermentation tank level and the high-density fermentation and high-efficient expression of the antibacterial peptide products are realized. After the fermentation liquor is further purified, the fermentation liquor can be prepared into an antibacterial peptide preparation, such as powder and liquid, used for preventing and treating livestock diseases.

The invention relates to a receptor antagonist for preventing diarrhea occurring on the weaned piglets and edema disease occurring on the piglets, a preparation method and an application. The receptor antagonist of the invention is an assemblage series of recombinant strains of probiotics, and is a MisL-Beta recombinant vector which expresses FedF formed by F18 or Fed adhering to prime subunit gene, and FaeG formed by K88 or F4 or Fae adhering to the prime subunit gene, based on the recombinant strain EP2 of the probiotics of escherichia coli with pig origin advantage and strain LP2 of probiotics of lactobacillus with pig origin advantage. The surface of the cell is good to express antigen technology, so after the piglets orally administrate the cell, the cell can colonize, sedentarily live and proliferate in the intestine. Furthermore, the cell on the surface of the epithelium of the intestine functionally shows secretory expression of highly conservative and cofunctional adhesins FedF and FaeG, that is, the receptor binding domain of F18 and K88 adhesins, which is preferentially bound with the surface of the epithelium of the intestine of the piglets, and thus the diarrhea occurring on the weaned piglets and the edema disease occurring on the piglets are controlled. The invention overcomes the defects that the present antibiotics are almost ineffective in the clinical treatment as most of piglets suffering from the edema disease die though treated by the present antibiotics, and the present antibiotics causes multiple drug resistance.

The invention relates to an antibacterial peptide. The antibacterial peptide is characterized in that the amino acid sequence of the antibacterial peptide is shown in SEQ ID No. 1. The antibacterial peptide enables five amino acids in an amino acid sequence of a swine-origin antibacterial peptide PMAP-36 to mutate based on the spatial structure analysis of the amino acid sequence of the swine-origin antibacterial peptide PMAP-36, and the five amino acids are respectively L7V, T11S, I18E, I25A and I32A. The antibacterial peptide product with higher antibacterial activity and better safety is obtained.

The invention discloses enterococcus faecalis, a micro-ecological preparation and an application of the micro-ecological preparation. The 16SrDNA sequence of enterococcus faecalis is shown in SEQ ID NO:1 and the collection number of enterococcus faecalis is CGMCC (China General Microbiological Culture Collection Center) No.6970. The micro-ecological preparation comprises enterococcus faecalis. Enterococcus faecalis is resistant to heat, acid, alkali and dryness, has strong resistance, more stable heredity and no toxicity and can suppress eight common pathogenic bacteria of pigs and cows. The micro-ecological preparation can promote sperm motility of pigs and cows and prolong the lives of pigs and cows, thus purifying the environments of genital tracts of female animals, improving and maintaining micro-ecological balance, ensuring normal physiological functions so that the female animals rut and ovulate on time and improving the fertility rate and litter size. The micro-ecological preparation has great scientific significance and good economic benefits when being applied to preventing various reproductive disturbance diseases of female animals.

The invention belongs to the technical field of animal bacteriology and vaccine genetic engineering preparation, and relates to a resistance mark-free recombinant bordetella bronchiseptica strain for expression of a pig toxaigenic pasteurella multocida toxA gene fragment, and its vaccine containing the resistance mark-free recombinant bordetella bronchiseptica strain, a preparation method and a use. The resistance mark-free recombinant bordetella bronchiseptica strain QH0814 delta aroA/toxA-N for expression of the pig toxaigenic pasteurella multocida toxA gene fragment does not contain a 5-enolpyrul-shikimate-3-phosphate synthase aroA gene of bordetella bronchiseptica, and contains the pig toxaigenic pasteurella multocida toxA gene fragment. The invention also discloses the preparation method of the resistance mark-free recombinant bordetella bronchiseptica strain and the vaccine use. The genetic engineering vaccine can stimulate a pig to produce a protective immune response for resisting pig toxaigenic pasteurella multocida and a wild strain of pig bordetella bronchiseptica, and can effectively prevent the double infection caused by pig toxaigenic pasteurella multocida and pig bordetella bronchiseptica.

The invention relates to swine-origin lactobacillus reuteri and prepared solid probiotics. The bacterial strain is separated from fresh night soil of healthy live pig, and is indentified as Lactobacillus reuteri YSJL-12 through a morphological biochemistry and molecular biology method, and a preservation number is CGMCC No. 9062. The bacterial strain inhibits Listeria monocytogenes CICC21633 to positive. The prepared solid probiotics contain soybean meal and active Lactobacillus reuteri YSJL-12, can substitute aureomycin for preventing and treating diarrhoea while added in a live pig basic feed, and the feed-gain ratio of the breeding pork pig at age in days of 28-168 is 2.61. The bacterial strain has the characteristics of strong host specificity, large live bacteria quantity, low cost and high cost performance, added value of high temperature soybean meal is increased, and the green live pig culture cost is reduced.

The invention discloses an anti-African swine fever virus single-chain antibody as well as a preparation method and application thereof. According to the invention, lymphocytes are separated from peripheral blood of naturally infected African swine fever immune tolerant pigs; extracting is carried out to obtain the total mRNA of the separated lymphocytes; the total cDNA fragments are obtained through an RT-PCR method; cDNA is taken as a template, under the action of a corresponding primer with a Linker joint, swine ScFv antibody gene sequence is obtained through an SOE-PCR method; constructingof an ScFv antibody gene sequence to a pET-30a vector is carried out, and BL21 competent cell transformation is carried out; the ScFv antibody (VH-VL kappa 6) aiming at the African swine fever virusis screened from a single colony after transformation, and preliminary activity identification is carried out on the screened ScFv antibody (VH-VL kappa 6) by adopting an ELISA test, it shows that theantibody has African swine fever reaction activity. The invention provides a new material for early diagnosis, prevention and control of African swine fever, and provides a new technical means for controlling epidemic situation propagation of African swine fever as soon as possible.

The invention discloses a breeding method for transgenic pigs expressing sIFITM3 (swine interferon induced transmembrane 3) genes. The breeding method comprises the steps as follows: firstly, the construction of swine fibroblast cell lines stably expressing the sIFITM3 genes comprises the following steps: the step a refers to the construction and the linearization of pcDNACAsIITM3 vectors, wherein, primers are designed, lymph node tissue RNA (Ribose Nucleic Acid) of pigs is extracted, the sIFITM3 genes are obtained through RT-PCR (Reverse Transcription-Polymerase Chain Reaction) amplification, ethanol precipitation is carried out, and sterile water is used for dissolving; the step b refers to liposome transfection, wherein, swine fibroblasts expressing sIFITM3 are constructed; the step c refers to screening and proliferation of nuclear donor cells transfected with the sIFITM3 genes; secondly, recombination blastula acquisition based on a manual nucleus transplantation method comprises the following steps: the step a refers to the preparation of recipient cells; the step b refers to enucleation and injection of the nuclear donor cells; and thirdly, the embryo transplantation and the acquisition of the transgenic pigs comprise the following steps: the step a refers to embryo transplantation, wherein, bred blastulas are transferred to a fallopian tube of a surrogate sow, and then detection is carried out; and the step b refers to transgenic individual identification. The breeding method is feasible, and is simple and convenient to operate; in addition, the pigs are the transgenic pigs expressing sIFITM3, and have the potential capability to resist animal virus such as foot-and-mouth disease virus, Japanese encephalitis virus, swine influenza virus and the like.

The invention discloses shRNA (short hairpin ribonucleic acid) suppressing IRS1 (insulin receptor substrate 1) gene expression and an application, and belongs to the technical field of gene engineering. A nucleotide sequence of the shRNA is represented by SEQ ID NO.1. The invention further discloses a shRNA interference vector capable of lowering swine-origin IRS1 and IRS2 gene expression simultaneously through connection with a plasmid vector comprising IRS2 genes. Results of swine liver cell IRS gene expression tests indicate that IRS1 genes and the IRS2 genes of swine are lowered by 78% and 64% by the shRNA interference vector respectively. Meanwhile, lowering of the IRS gene expression level affects glucolipid metabolism of swine liver cells, so that the blood sugar concentration of the swine liver cells is increased. According to the shRNA, a foundation is laid for establishment of a type 2 diabetes mellitus swine model, and helpful exploration for increase of the swine blood sugar concentration is conducted.

The invention relates to a swine-derived reshaped antibody with insecticidal activity, and a preparation method and application thereof. The preparation method comprises the following steps: predicting 8 FRs of swine-derived antibody heavy and light chain variable regions by using biological information science, implanting 6 CDRs (complementary determining region) of an anti-specific single chain antibody A12 to determine the sequence of the swine-derived reshaped antibody, carrying out artificial synthesis to construct the swine-derived reshaped antibody of A12, and substituting a PIT2 vector capable of easy bacteriophage expression to obtain the swine-derived reshaped antibody. The reshaped antibody has certain combining capacity with intestine BBMV in cabbage moth, and has insecticidal activity. The method of utilizing the biological information science prediction and artificial synthesis can quickly and efficiently obtain the animal-derived reshaped antibody, and uses the gene engineering antibody technique to search and develop the possibility of the novel high-safety insecticidal protein resources, thereby providing a new idea and direction for developing novel insecticides.

The invention discloses a method for constructing a composite scaffold of pig-derived collagen membrane-autologous chondrocytes. The specific steps are as follows: take the patient's articular cartilage, shake and clean it; cut the cartilage tissue into pieces; obtain cell suspension; precipitate as chondrocytes; Dried the porcine type Ⅰ/Ⅲ collagen membrane, placed it in a sterile plastic plate, slowly dripped the cell suspension on the rough surface of the prepared porcine type Ⅰ/Ⅲ collagen membrane with a plastic sleeve until the collagen membrane reached Wet and saturated state; wait for 10-15 minutes after the collagen membrane adsorbs the cells. The invention has the advantages of good therapeutic effect and the like.

The invention belongs to the technical field of animal biological products, and in particular relates to construction of plasmid pASPITI-CS. The plasmid comprises hog cholera vaccine C strain infectious cDNA clone, fusion of a hog RNA (Ribonucleic Acid) polymerase I promoter sequence at the 5' tail end of the genome cDNA, and insertion of plasmid pASPITI-CS of a mouse RNA polymerase I termination sub-sequence at the 3' tail end. The plasmid is transfected to hog origin cells PK15, so that hog cholera vaccine C strain virus can be directly generated. Escherichia coli DH10B/pASPITI-CS transformed with the plasmid pASPITI-CS is preserved in the China centre for type culture collection; and the preservation number is CCTCC NO.M2015062. The hog cholera vaccine C strain infectious cDNA clone can be used for genetically modifying to prepare high-titre hog cholera vaccines or constructing bivalent vaccines based on a hog cholera vaccine vector.

The present invention provides oligonucleotide primers, compositions, and kits containing the same for rapid identification of viruses (e.g., swine-origin influenza A (H1N1) virus) which are members of the influenza virus family by amplification of a segment of viral nucleic acid followed by molecular mass analysis.

The invention discloses a pig-source lactobacillus mucosae and an application thereof. The strain is named as lactobacillus mucosae LM410, and the preservation number is CGMCC No.22828. The strain is separated from manure of healthy pigs, and has good acid production, acid resistance, cholate resistance and pathogenic bacterium antagonism. The lactobacillus mucosae LM410 provided by the invention can inhibit the growth of C-type clostridium perfringens, has an obvious protection effect on pig intestine epithelial cell injury caused by the C-type clostridium perfringens, and has a wide development prospect and application value in the aspect of preventing and treating bacterial infectious intestinal diseases of livestock and poultry.

A mugwort pill containing a 95% ethanol extract of wormwood having an inactivation power with respect to a novel swine-origin influenza virus and an avian influenza virus is disclosed. In more details, the conventional mugwort pill is prepared by a hot water extraction method and has 0.8% of crude fat component; however the ethanol extract mugwort crude fat of the present invention is 11.6%, in particular the crude fat component is 14.5 times higher, and the novel swine-origin influenza virus (H1N1) can be inactivated 99.99%, and it has a good disinfection effect to an avian influenza virus (H9N2). When a mugwort pill containing a 95% ethanol extract of wormwood having an inactivation power with respect to a novel swine-origin influenza virus and an avian influenza virus is administrated to people or fowls, the people or fowls can have immunity with respect to a novel swine-origin influenza virus and an avian influenza virus.

The invention discloses generic inert carrier salmonella S9H and a potential application thereof. The generic inert carrier salmonella S9H is obtained by continuously culturing inert carrier bacteriaS9 in vitro by using an LB solid and liquid culture medium for passage to the fortieth generation, under the condition of the quantity of bacteria with working concentration, the non-specific agglutination reaction with serum and whole blood of human sources, mouse sources, cattle sources, pig sources and poultry sources (including chickens, ducks, gooses, turkeys, pigeons and quails) can be avoided, the characteristics of carrying and surface expression displaying human sources, mouse sources, cattle sources, pig sources and poultry sources (including chickens, ducks, gooses, turkeys, pigeonsand quails) for different resistance factors are realized, the generic inert carrier salmonella S9H can be applied to development of an indirect agglutination test detection method for simply, conveniently and quickly detecting human and various animal antigens or infected antibodies, improves and perfects the technical bottleneck of poor specificity and sensitivity of an existing agglutination test for agglutination antigen and antibody detection, and has a wide application value and market prospect.

The invention discloses a swine-origin miR-c89 capable of resisting PRRSV (Porcine reproductive and respiratory syndrome virus) infection. Through RT-qPCR (Real Time-quantitative Polymerase Chain Reaction), TCID50 (Tissue Culture Infectious Dose 50) and western blot methods, miR-c89 derived from swine coding is proved to obviously inhibit the replication and the proliferation of high pathogenicityand low pathogenicity PRRSV for the first time, the micoRNA is hopefully developed into a novel medicine capable of preventing and curing porcine reproductive and respiratory syndrome and used for researching the gene-modified pig capable of resisting the porcine reproductive and respiratory syndrome, and a foundation is laid for the prevention and control of the PRRSV.

The invention provides nest-type fluorescence PCR detection primers, a probe composition and a kit for donkey and pig-sourced ingredients in colla corii asini and a detection method and application, and relates to the technical field of molecular biology. By means of the primers, the probe composition and the multiple nest-type fluorescence PCR detection kit, the donkey and pig-sourced ingredients in colla corii asini can be rapidly identified. For trace DNA or degraded DNA in colla corii asini, a nest-type PCR and small fragment amplification technology is adopted, the probability for effectively identifying target points by means of the primers and a probe is greatly increased, and therefore the detection accuracy and sensitivity are greatly improved; two steps of PCR amplification are conducted in a same system, and the advantages that closed tube operation is achieved, the contamination rate is low, the detection sensitivity is high, the specificity is good, the accuracy is high, and the flux is large are achieved.

The invention relates to a porcine antibacterial peptide PMAP-23 variant and application thereof in preparation of feed. A peptide fragment of a porcine antibacterial peptide PMAP-23 is modified, so that the antibacterial activity and safety of the antibacterial peptide are improved, the antibacterial peptide variant has improved thermal stability, the porcine antibacterial peptide PMAP-23 variant is further prepared into a feed additive which can be used for feeding piglets and other animals, and is used for improving the growth performance of the animals, reducing the feed conversion ratio and improving the economic benefit of breeding; and as the variant of the natural antibacterial peptide, the antibacterial peptide variant does not bring drug resistance to fed animals, and has positive social significance.

The invention discloses three scFv antibodies and encoding genes thereof and application of the scFv antibodies in preparing preparations for treating or preventing an O-type foot-and-mouth disease. Three single-chain antibodies, namely scFv antibodies are provided; the scFv antibodies have the capability of specifically binding to FMDV structural protein 1 (VP1) and O-type FMDV toxic strains. Byadopting the swine-origin scFv antibodies, defects can be overcome that when an immune serum and an egg yolk antibody are in use, preparation is complicated, the production cost is high, effects are unstable, the quality during industrial production is difficult to control, and horizontally transmitted diseases are caused. The swine-origin scFv antibodies have the advantages of being high in specificity, controllable in quality during industrial production, and the like; the problems of the horizontally transmitted diseases and anaphylactic reaction which are caused by the immune serum are avoided.

A kit for detect a swine-derived component comprising a prim pair shown in SEQ ID NO. 1 to SEQ ID NO. 2 and a probe shown in SEQ ID NO. 3, and a method for detecting a swine-derived component. The kitand the method of the invention can accurately detect pig-derived ingredients in meat and meat products, and the kit and the method have the advantages of fast detection, accuracy, low cost, good specificity, high sensitivity, and wide application prospect.