Cellular Immunity in Hamsters After Immunization With Vaccinia Virus: Studies on Macrophage Functional Heterogeneity and Interactions Between Natural Killer Cells and Macrophages
Chapes, Stephen Keith
This item is only available for download by members of the University of Illinois community. Students, faculty, and staff at the U of I may log in with your NetID and password to view the item. If you are trying to access an Illinois-restricted dissertation or thesis, you can request a copy through your library's Inter-Library Loan office or purchase a copy directly from ProQuest.
Permalink
https://hdl.handle.net/2142/68235
Description
Title
Cellular Immunity in Hamsters After Immunization With Vaccinia Virus: Studies on Macrophage Functional Heterogeneity and Interactions Between Natural Killer Cells and Macrophages
Author(s)
Chapes, Stephen Keith
Issue Date
1981
Department of Study
Veterinary Medical Science
Discipline
Veterinary Medical Science
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Health Sciences, Immunology
Language
eng
Abstract
This study demonstrated that macrophage (M(phi)) subpopulations can be isolated from normal and vaccinia virus-immune peritoneal exudate cells after separation on bovine serum albumin (BSA) discontinuous density gradients. The M(phi) subpopulations from normal and early- or late-immune animals were all phagocytic but differed in their ability to mediate cytotoxicity. Normal M(phi) subpopulations were not cytotoxic, whereas the 40/30 and pellet fractions collected from BSA gradients of immune M(phi)s were cytotoxic. In contrast, M(phi)s isolated from the lighter fractions were found to be poor killer cells.
This investigation demonstrated that immune peritoneal M(phi)s could activate bone marrow (BM) natural killer (NK) cells in vitro. Freshly harvested, noncytotoxic, BM cells were co-cultured with immune M(phi)s for 20 to 24 hours and were thereafter assayed for cytotoxicity in a ('51)Cr release assay. We found that co-cultured BM cells became potent killer cells. These activated BM cells were characterized as being nonspecifically cytotoxic, nylon wool nonadherent, Fc-receptor positive and radiation resistant. In addition, it became apparent that helper M(phi)s are generated sooner after immunization with vaccinia virus, than cytotoxic M(phi)s.
Only two BSA-Subpopulations of early-immune M(phi)s were found to mediate helper function. Forty-thirty and 30/20 M(phi)s were both able to generate BM-NK cells whereas the other subpopulations lacked helper activity.
Our findings suggest that BM-NK cell activation by the M(phi) is probably mediated through M(phi)-BM-NK contact. Interferon was undetected in our co-culture supernatants and other soluble mediators were also unable to stimulate freshly harvested BM cells.
This study discusses a model for the ontogeny of NK cells, and the role of M(phi)s and interferon in the generation of fully mature NK cells.
Use this login method if you
don't
have an
@illinois.edu
email address.
(Oops, I do have one)
IDEALS migrated to a new platform on June 23, 2022. If you created
your account prior to this date, you will have to reset your password
using the forgot-password link below.
