Genetic controls of T cell-independent Thy-1 alloantibody responses |
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Authors: | Ken-ichi Isobe Dr Izumi Nakashima Fumihiko Nagase Tomoaki Yoshida Ko-ichi Ando Reiko Inagi Nobuo Kato Kimiko Ohashi |
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Institution: | (1) Departments of Immunology and Bacteriology, Nagoya University School of Medicine, 466 Nagoya, Japan;(2) Present address: ICRF Tumour Immunology Unit, Department of Zoology, University College London, London WCIE, England;(3) Department of Immunology, Nagoya University School of Medicine, 65 Tsurumai-cho, 466 Showa-ku, Nagoya, Japan |
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Abstract: | Early and late primary IgM antibody responses of mice to Thy-1.1 antigens showed different antigenic and cellular requirements. We studied genetic controls of the early primary responses, which could be induced by subcellular thymocyte antigens independently of host T-cell activity. All Thy-1.2 mouse strains of Igh
a(BALB/c and BC8), Igh-V
aCb(BAB14), Igh
d(AKR/Cum), Igh
j(CBA/J, C3H/HeN, C3H.SW, and C3H.JK), and Igh
n(NZB) definitely responded early to Thy-1.1 antigens from AKR/J (Igh
d), A.Thy-1.1 (Igh
e), or B10.Thy-1.1 (Igh
b) mice or SD rats, whereas all strains of Igh
b(C57BL/6, C57BL/10, B10.D2, B10.BR, B10.A, CB20 and CWB), Igh
c(DBA/2), Igh
e(A/J), and Igh
o(C.AL20) responded poorly to the same antigens. This contrasts with the observation that both strains of Igh
j(C3H/HeN) and Igh
b(B10.BR) responded well at later times. As was the case for late responses, the matching of H-2 between donor and recipient resulted in early responses of exceptional quality in high-responder strains. It was concluded that under the influence of H-2, whose incompatibility between donor and recipient partially interferes with responses, early but not late primary Thy-1.1-specific antibody responses are selectively controlled by Igh-V or closely linked Ir gene(s) as a new V
Hmarker.Abbreviations used in this paper Tl
T cell-independent
- TD
T cell-dependent
- PFC
plaque-forming cell(s)
- Igh
immunoglobulin heavy chain
-
V
H
variable region of heavy chain
-
C
H
constant region of heavy chain |
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Keywords: | |
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