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Science 16 August 1968:
Vol. 161. no. 3842, pp. 696 - 698
DOI: 10.1126/science.161.3842.696
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Articles

Trophoblast Antigenicity Demonstrated by Altered Challenge Graft Survival

Jaroslav F. Hulka 1 and Kathleen Mohr 1

1 Department of Obstetrics and Gynecology, University of North Carolina School of Medicine, and Carolina Population Center, University of North Carolina, Chapel Hill

Adult C57BL/6J male mice received either a primary ectopic transplant or a primary and a challenge ectopic transplant of trophoblast tissue obtained from the ectoplacental cones of 7frac12-day-old C3H/HeJ x C3H/HeJ embryos. Gross and histologic examinations of these grafts at 5, 7, and 12 days of growth indicated that the challenge grafts were inhibited in growth; there were a smaller percentage of grossly successful grafts, smaller hemorrhagic reactions, fewer viable cells at all stages of growth, and better host containment of the colony. The evidence indicates that exposure to pure trophoblast alters an animal's subsequent reaction to grafts syngeneic with the original trophoblast and can best be explained as evidence of immunologic sensitization of the host.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)