CD98hc facilitates B cell proliferation and adaptive humoral immunity.
CD98hc facilitates B cell proliferation and adaptive humoral immunity.
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Proliferation of antigen-specific lymphocytes and resulting clonal expansion is essential for adaptive immunity. We report that B cell-specific deletion of CD98hc reduced antibody responses due to total suppression of B cell proliferation and subsequent plasma cell formation. Deletion of CD98hc didn’t impair early B cell activation, but did inhibit later activation of the MAP kinase Erk1/2 and down regulation of the p27 cell cycle inhibitor. Reconstitution of CD98hc-deficient B cells with CD98hc mutants revealed that the integrin-binding domain of CD98hc is required, but the amino acid transport function of CD98hc is dispensable, for B cell proliferation. Thus, CD98hc supports integrin-dependent rapid proliferation of B cells. We propose that the advantage of adaptive immunity favored appearance of CD98hc in vertebrates.
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影响因子:
32.4
作者:
Arana, Eloisa;Vehlow, Anne;Batista, Facundo D.
通讯作者:
Batista, Facundo D.
DOI:
10.1073/pnas.89.12.5606
发表时间:
1992-06-15
影响因子:
11.1
作者:
BERTRAN, J;MAGAGNIN, S;MURER, H
通讯作者:
MURER, H
DOI:
10.1084/jem.20021569
发表时间:
2003-02-03
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Lo CG;Lu TT;Cyster JG
通讯作者:
Cyster JG
影响因子:
64.8
作者:
Laemmermann, Tim;Bader, Bernhard L.;Sixt, Michael
通讯作者:
Sixt, Michael
DOI:
10.1073/pnas.0404852102
发表时间:
2005-01-11
影响因子:
11.1
作者:
Feral, CC;Nishiya, N;Ginsberg, MH
通讯作者:
Ginsberg, MH