Mice Severe combined immunodeficiency (non-human)
a close-up of white severe combined immunodeficiency (scid) mouse held human hand.
scid mice routinely used model organisms research basic biology of immune system, cell transplantation strategies, , effects of disease on mammalian systems. have been extensively used hosts normal , malignant tissue transplants. in addition, useful testing safety of new vaccines or therapeutic agents in immunocompromised individuals.
the condition due rare recessive mutation on chromosome 16 responsible deficient activity of enzyme involved in dna repair (prkdc or protein kinase, dna activated, catalytic polypeptide ). because v(d)j recombination not occur, humoral , cellular immune systems fail mature. scid mice, therefore, present impaired ability make t or b lymphocytes, or activate components of complement system, , cannot efficiently fight infections, nor reject tumors , transplants.
by crossing scid mice mice carrying mutations in related genes, such interleukin-2rgamma, more efficient immunocompromised strains can created further aid research. degree various components of immune system compromised varies according other mutations mice carry along scid mutation.
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