Tissue graft

Antigens, however, can induce a second type of response which is known as the cell-mediated immune response. The antigenic agent stimulates the appearance of sensitized lymphocytes in the body which confer protection against organisms that have the ability to live and replicate inside the cells of the host. Certain of these lymphocytes are also involved in the rejection of tissue grafts. 

Virally infected host cells, and also tissue grafts from a genetically dissimilar donor, have been shown to stimulate the formation of T cells that are cytotoxic for these cells (Tc cells). Tc cells express CDS on their cell surface. 

Merika, P Quality control of freeze dried tissue grafts. International Institute of Refrigeration , Com. Cl, p. 102-105, Paris, 1983... 

Tissue graft with antimicrobial or other drug agent. 

Antiserum can be raised againsf lymphocyfes or fhymo-cyfes by fhe repealed injection of human cells into an appropriate recipient, usually a horse. The use of such antiserum or the immune globulin fraction derived from it has been used to produce immunosuppression. Although antilymphocytic serum can suppress cellular and often humoral immunity against a variety of tissue graft systems, the responses are variable, particularly from one batch of serum to another. 

Agents that suppress the immune system play an important role in preventing the rejection of organ or tissue grafts and in the... 

Establishment of tolerance to tissue grafts. If a newborn X mouse is injected with Y cells when it is young, it is tolerant to Y tissue transplants when it becomes an adult. If the X mouse is not exposed to Y cells at an early age, it readily rejects the tissue graft. 

HISTOCOMPATIBILITY COMPLEX The set of histocompatibility genes that are important in the acceptance or rejection of tissue grafts. 

Marine pearl oysters that are umed ate all nudeated with a bead and a piece of mantle tissue. Freshwater mussels that ate farmed are implanted with mantle tissue grafts only. In some areas the oysters and mussels to be used are bred and cultivated until they reach maturity and can be implanted. In other areas oysters are cau t in the wild to be cultivated. 

Non-nucleated cultured pearls may show the same rings as a natural pearl, but with evidence of an irregular cavity in the centre, caused by the mantle tissue graft. 

Fibrinolysis Degrades blood clots Degrades tissue grafts... 

Ausprunk, D. H., Knighton, D. R. and Folkman, J. (1975). Vascularization of normal and neoplastic tissues grafted to the cick chorioallantois. Am. J. Pathol. 

Most nuclear procedures are of a diagnostic nature. In some instances, however, radionuclides administered to the patient are valuable therapeutic tools. For example, one in every three persons admitted to U.S. hospitals undergoes a nuclear medical procedure for diagnosis or therapy. Many of these procedures employ radioisotopes. Some of the more frequent uses of medical radioisotopes include diagnosis and treatment of several major diseases, sterilisation of medical products such as tissue grafts, nutrition research, and biomedical research into cellular processes. 

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