Modulation of allo-immune responses in vivo and in vitro by sperm specific lactate dehydrogenase-C4.
The role of sperm specific lactate dehydrogenase-C4 (LDH-C4) in allo-immune responses using mixed lymphocyte cultures (MLC) and cytotoxic T cell (CTL) generation in vitro and local graft versus host (LGVH) reaction and allograft enhancement in vivo has been ascertained. LDH was purified from testes (LDH-C4) and kidney (LDH-B4) of C57Bl/Ks mice. MLC and CTL were performed using C57Bl/Ks-anti A/J lymphocytes in presence of 10(-3)-1 micrograms LDH-B4 or LDH-C4 per culture. The MLC and CTL responses showed biphasic action depending on the dose of LDH-C4. Early MLC culture gave significantly low stimulation index at 10(-2)-10(-1) micrograms LDH-C4 as compared to non-treated control cultures. However, the MLC response in presence of LDH-C4 was not different from the LDH-B4 treated one which showed a similar biphasic trend. On the other hand, 51Cr release from YAC-222 target cells was practically abolished by LDH-C4 at 10(-3)-1(-1) micrograms, and this was strikingly different from LDH-B4 or non-treated cultures. LGVH reactivity as performed by using C57Bl/Ks lymphocytes along with LDH-C4 in (C57Bl/Ks x A/J) F1 hybrids indicated a suppression of stimulation index in primary and secondary (i.e. preimmunized in presence of LDH-C4 or LDH-B4) LGVH. Allograft enhancement of Sa I (A/J) in C57Bl/Ks mice in presence of LDH-C4, was delayed slightly but significantly during primary or secondary transplantation reaction.(ABSTRACT TRUNCATED AT 250 WORDS)
Gupta
G S
GS
Department of Biophysics, Panjab University, Chandigarh, India.
Kinsky
R G
RG
D000818:Animals; D002478:Cells, Cultured; D003601:Cytotoxicity Tests, Immunologic; D006087:Graft vs Host Reaction / Q000276:immunology; D007108:Immune Tolerance; D066298:In Vitro Techniques; D007519:Isoantigens; D007527:Isoenzymes; D007770:L-Lactate Dehydrogenase / Q000502:physiology*; D008198:Lymph Nodes / Q000276:immunology / Q000637:transplantation; D008214:Lymphocytes / Q000276:immunology; D008297:Male; D051379:Mice; D008805:Mice, Inbred A; D008810:Mice, Inbred C57BL; D013094:Spermatozoa / Q000201:enzymology*; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology; D014184:Transplantation, Homologous
D007519:Isoantigens; D007527:Isoenzymes; D007770:L-Lactate Dehydrogenase