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  • Title: Medroxyprogesterone, immunosuppression, and conceptus size in Peromyscus.
    Author: Bell FE, Palmer JS, Dawson WD.
    Journal: J Exp Zool; 1983 May; 226(2):273-9. PubMed ID: 6345716.
    Abstract:
    Effects of exogenous medroxyprogesterone acetate (MPA) on skin transplant retention and conceptus size were studied in the deer mouse, Peromyscus maniculatus, and the oldfield mouse Peromyscus polionotus. Daily injections of 2 mg MPA significantly prolonged survival of allografts in P. maniculatus and transspecific grafts between P. maniculatus and P. polionotus. Allografts were retained significantly longer than transspecific grafts (17.2 vs 12.4 days) on MPA-treated P. maniculatus. Near-term fetal and placental sizes and weights were not detectably influenced by daily 1-mg MPA injections given to the mother from the 5th through the 19th day of pregnancy. The data are discussed relative to the possible immunosuppressive role of progestins in protecting the allogeneic conceptus from maternal immune rejection.
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