Tissue typing by mixed culture of lymphocytes. 3. Demonstration of correlation between the rate of blastformation in mixed lymphocyte culture of dog peripheral blood and the intensity of kidney-transplant rejection

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<p>1) It has been found that the peripheral blood of hybrid adult dogs contains about 29.4 % of lymphocytes in average. When such a blood is passed through the glass wool column the leucocytes containing 68-90 % (81.6% in average) lymphocytes are obtained. 2) In the single culture of such lymphocytes alone and mixed culture both live lymphocytes and sonicated lymphocytes in the presence of 1% (vIv) PHA, the peak of the blastformation of lymphocytes is observed at culture hour 72. 3) In the abscence of PHA both single culture and mixed culture of lymphocytes show hardly any blastformation. 4) In the mixed culture of live lymphocytes with homogenate of sonicated lymphocytes with addition of 1% (vIv) PHA the rate of blast. formation observable at culture hour 72 and the rejection of kidney trans· plant 7 days after its transplantation of hybrid adult dogs show a direct correlation, demonstrating that the mixed lymphocyte reaction reflects accurately the difference in donor histocompatibility antigens against the recipient.</p>

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