The Journal of Experimental Medicine
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Journal of Experimental Medicine, Vol 149, 793-807, Copyright © 1979 by Rockefeller University Press

ARTICLES

Cellular requirements for lipopolysaccharide adjuvanticity. A role for both T lymphocytes and macrophages for in vitro responses to particulate antigens

JR McGhee, JJ Farrar, SM Michalek, SE Mergenhagen and DL Rosenstreich

By employing primary cultures of purified spleen cells from lipopolysaccharide (LPS) responder (C3H/HeN or C57BL/10Sn) or nonresponder (C3H/HeJ or C57BL/10ScN) mice incubated with particulate antigen and LPS prepared by phenol-water extraction (Ph), we have presented evidence that both T cells and macrophages (MO) are required for LPS-induced adjuvanticity. First, MO derived from C3H/HeN spleen cells, when mixed with responder, C3H/HeN lymphocytes and Ph-LPS, elicited enhanced antibody responses to sheep erythrocytes (SRC) antigen, whereas lymphocytes from the nonresponder, C3H/HeJ mouse strain did not evoke this response. Similarly, purified T cells from C3H/HeN spleens, when cultured with responder, nu/nu spleen cells, and Ph-LPS yielded enhanced anti-TNP PFC responses; whereas, C3H/HeJ T cells did not potentiate immune responses when mixed with optimal concentrations of Ph-LPS. LPS prepared by butanol-water extraction elicited significant adjuvant effects with all cell combinations. Finally, purified responder T cells and MO enabled either responder or nonresponder B cells to elicit LPS potentiation. These data indicate that T cells and MO are controlling LPS-induced augmentation of B-cell responses.
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