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45 results about "IMMUNOLOGIC DEFICIENCY" patented technology

Immunodeficiency (or immune deficiency) is a state in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. Most cases of immunodeficiency are acquired ("secondary") due to extrinsic factors that affect the patient's immune system.

Green feed additive and preparation method thereof

The invention discloses a green feed additive and a preparation method thereof. The green feed additive is prepared by mixing the following components in portion by weight: 40 to 60 portions of cortex eucommiae extract, 10 to 20 portions of streptococcus faecalis powder, 30 to 40 portions of polysaccharide peptide powder and 8 to 20 portions of folium cortex eucommiae finemeal, wherein the cortex eucommiae extract at least contains 0.2 percent of chlorogenic acid; the polysaccharide peptide powder is prepared by concentrating, decoloring, precipitating with alcohol and drying the ferment liquid which is obtained by fermenting the streptococcus faecalis powder. The components of the invention are integrally applied, which can remarkably improve the function of an animal immune system, strengthen disease preventing ability of organism, and resist the intrusion of pathogen; the green feed additive contains virus resisting the immunodeficiency which can bidirectionally adjust the function of cellular immunity and greatly improve the survival rate of feeding animals; and under the conditions without hormone, the green feed additive can promote the growth and breed of animals, greatly improve the quality and taste of eggs and meat, and keep the meat quality more fresh and more close to wild taste.
Owner:SHANXI DAYU BIOLOGICAL ENG CO LTD

System for preparing severe immunodeficiency swine-derived recombinant cells with joint knockout of four RRIP genes

The invention discloses a system for preparing severe immunodeficiency swine-derived recombinant cells with joint knockout of four RRIP genes, and particularly relates to a system for preparing severeimmunodeficiency swine-derived recombinant cells with joint knockout of four genes such as an RAG1 gene, an RAG2 gene, an IL2RG gene and a PRKDC gene. The invention provides an sgRNA (Ribonucleic Acid) combination. The sgRNA combination consists of sgRNARAG1-g4, sgRNARAG2-g2, sgRNAIL2RG-g7 and sgRNAAPRKDC-g6. The target sequence binding region of the sgRNARAG1-g4 is shown as nucleotides at the first to the twentieth site in SEQ ID NO: 9; the target sequence binding region of the sgRNARAG2-g2 is shown as nucleotides at the first to the twentieth site in SEQ ID NO: 13; the target sequence binding region of the sgRNAIL2RG-g7 is shown as nucleotides at the first to the twentieth site in SEQ ID NO: 24; and the target sequence binding region of the sgRNAPRKDC-g6 is shown as nucleotides at the first to the twentieth site in the SEQ ID NO: 34. The invention lays a solid foundation for preparation of a severe immunodeficiency swine model, and has important application values for research and development of severe immunodeficiency medicine.
Owner:NANJING KGENE GENETIC ENG CO LTD

Mouse-derived oral squamous cell carcinoma cell strain, and preparation method and application thereof

PendingCN113201495ASolve the problem of poor tumor formation effectCompound screeningCell dissociation methodsCarcinoma cell lineSquamous Carcinomas
The invention discloses a mouse-derived oral squamous cell carcinoma cell strain,and a preparation method and application thereof, and the preparation method comprises the following steps: firstly, adding 4-nitroquinoline-N-oxide into mouse drinking water, inducing mouse oral squamous cell carcinoma, and obtaining mouse oral squamous cell carcinoma tumor tissues; carrying out digestion and primary culture on the mouse tumor tissue to obtain mouse tumor primary cells; selecting a monoclonal cell from the primary cells by adopting a monoclonal screening method; and purifying the monoclonal cells, carrying out continuous passage, and screening out a cell strain to obtain the mouse oral squamous cell carcinoma cell strain. The mouse squamous cell carcinoma cells can form tumors on both immunodeficient nude mice and immune-healthy C57BL/6J mice, so that the problem that the existing human oral squamous cell carcinoma cell line has poor tumor forming effect on immune-healthy mice is solved; the invention has an important value in establishment of a tumor immune mouse model and research of a subsequent interaction mechanism of a tumor and an immune system.
Owner:SHANGHAI NINTH PEOPLES HOSPITAL AFFILIATED TO SHANGHAI JIAO TONG UNIV SCHOOL OF MEDICINE

Ceratopteris pteridoides gene for resisting human immunologic deficiency disease toxoprotein congeners, and preparation method and application thereof

InactiveCN101838654AScreening Technology ImprovementsConvenient researchPeptide/protein ingredientsAntiviralsCeratopteris pteridoidesDisease
The invention discloses a ceratopteris pteridoides gene for resisting human immunologic deficiency disease toxoprotein congeners, and a preparation method and application thereof. The preparation method comprises the following steps: 1, extracting total DNA by using an improved CTAB method, and preserving; 2, amplifying the intermediate segment of the ceratopteris pteridoides gene for resisting human immunologic deficiency disease toxoprotein congeners; 3, amplifying 5' flanking sequence of the ceratopteris pteridoides gene for resisting human immunologic deficiency disease toxoprotein congeners; 4, amplifying 3' flanking sequence of the ceratopteris pteridoides gene for resisting human immunologic deficiency disease toxoprotein congeners; and 5, recycling and cloning the PCR product: recycling the intermediate segment of the target gene, and 5' and3' flanking sequence segments, transforming, culturing and selecting white colonies; and 6, judging the clone, measuring the sequence and splicing. The gene can be used for regulation and control on expression of potential antivirus genes in plant research, carrying out research into plant antivirus gene engineering, and further establishes a ceratopteris pteridoides CVNH protein preparation system, thereby finally realizing large-scale industrial production.
Owner:WUHAN BOTANICAL GARDEN CHINESE ACAD OF SCI
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