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. 1970 Mar;6(3):345–361.

Allograft immunity in vitro. I. Cultivation conditions and mixed lymphocyte interaction of mouse peripheral lymphocytes

P Häyry, V Defendi
PMCID: PMC1712701  PMID: 4315207

Abstract

We have adapted mouse peripheral lymphocytes to culture as a preliminary step in designing a model for the study of allograft immunity in vitro. The isolation of peripheral leucocytes is facilitated by using Plasmagel® as an erythrocyte-agglutinating agent. The yield of leucocytes can be considerably increased by intravenous injection of the donor animals with supernatant fluid from Bordetella pertussis cultures and the lymphocytes thus mobilized react both to phytohaemagglutinin (PHA) and allogeneic stimulus, as do lymphocytes from untreated animals. Preparations which contain more than 25–50 RBC/WBC are refractory in the mixed lymphocyte interaction (MLI). The optimum cell density for the proliferative response is approximately 1–3 × 106 lymphocytes/ml. Various nutritive milieu were tested and found to have little influence on the MLI; both normal and suspension media behaved in a similar manner. PHA causes a vigorous proliferative response in mouse peripheral lymphocytes, the 3H–TdR incorporation values in PHA-containing cultures at peak point of stimulation (3rd day) being up to 1000 times those observed for control cultures. The allogeneic response in the MLI takes place later (6th to 7th day) and is weaker, about one-tenth the PHA response, when strains differing at the H-2 locus are used as cell donors. Because the specific proliferative response to allogeneic stimulus in mixed culture, regardless of the way it is measured, is indistinguishable from the response produced by other non-specific factors, these other factors must be critically excluded. It appears that supplementing the culture medium with low concentrations of certain lots of foetal calf or agamma-newborn-calf serum permits the study of the specific response at an optimum sensitivity.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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