The Journal of Experimental Medicine
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The Journal of Experimental Medicine, Vol 132, 613-622, Copyright © 1970 by The Rockefeller University Press

ARTICLE

CELLULAR BASIS OF THE GENETIC CONTROL OF IMMUNE RESPONSES TO SYNTHETIC POLYPEPTIDES : I. DIFFERENCES IN FREQUENCY OF SPLENIC PRECURSOR CELLS SPECIFIC FOR A SYNTHETIC POLYPEPTIDE DERIVED FROM MULTICHAIN POLYPROLINE ([T, G]-PRO--L) IN HIGH AND LOW RESPONDER INBRED MOUSE STRAINS



Edna Mozes Ph.D.1, G. M. Shearer Ph.D.1, and Michael Sela Ph.D.1

1 From the Department of Chemical Immunology, The Weizmann Institute of Science, Rehovot, Israel

SJL mice are high responders to the synthetic multichain polypeptide antigen (T,G)-Pro--L, whereas DBA/1 mice are low responders (10, 11). In order to determine whether the genetic control of immune response can be correlated with the number of antigen-sensitive precursor cells, spleen cell suspensions from normal and immunized SJL and DBA/1 donor mice were transplanted into lethally X-irradiated syngeneic recipients (incapable of immune response) along with (T, G)-Pro--L. Anti-(T, G)-Pro--L responses (donor-derived) were assayed in the sera of the hosts 12–16 days later. By transplanting graded and limiting numbers of spleen cells, inocula were found which contained one or a few antigen-sensitive precursors reactive with the immunogen. Using this method to estimate the relative numbers of such cells for the high responder SJL strain, one precursor was detected in sim1.3 x 106 and sim7.2 x 106 spleen cells from immunized and normal donors, respectively. In contrast, one precursor was detected in about 30 x 106 spleen cells from low responder DBA/1 mice, irrespective of whether the donors had been immunized.

These results indicate that the genetic control of immunity to the synthetic polypeptide antigen investigated is directly correlated to the relative number of precursor cells reactive with the immunogen in high and low responder strains.

 Submitted on April 1, 1970


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