TY - JOUR
T1 - 244-251 IgM + memory B cell expression predicts HIV-associated cryptococcosis status
AU - Subramaniam, Krishanthi
AU - Metzger, Brian
AU - Hanau, Lawrence H.
AU - Guh, Alice
AU - Rucker, Lisa
AU - Badri, Sheila
AU - Pirofski, Liise Anne
N1 - Funding Information:
Data in this article were collected by the Multicenter AIDS Cohort Study (MACS), with centers (and principal investigators) at The Johns Hopkins University Bloomberg School of Public Health (Joseph B. Margolick and Lisa Jacobson); Howard Brown Health Center and Northwestern University Medical School (John Phair); University of California, Los Angeles (Roger Detels); and the University of Pittsburgh (Charles Rinaldo). The MACS is funded by the National Institute of Allergy and Infectious Diseases, with additional supplemental funding from the National Cancer Institute and the National Heart, Lung, and Blood Institute (grants UO1-AI-35042, 5-MO1-RR-00722 [General Clinical Research Center], UO1-AI-35043, UO1-AI-37984, UO1-AI-35039, UO1-AI-35040, UO1-AI-37613, and UO1-AI-35041).
Funding Information:
Received 20 November 2008; accepted 27 January 2009; electronically published 15 June 2009. Potential conflicts of interest: none reported. Presented in part: 108th General Meeting of the American Society of Microbiology, 2–4 June 2008, Boston, MA (Abstract E-033). Financial support: National Institutes of Health (grants R01 AI 35370, 44374, and 45459 to L.P.); Molecular Pathogenesis of Infectious Diseases Training Grant (T32 AI 007506–10 to K.S.). Reprints or correspondence: Dr. L. Pirofski, Dept. of Medicine, Div. of Infectious Diseases, Albert Einstein College of Medicine, Forchheimer Bldg., Rm. 709, 1300 Morris Park Ave., Bronx, NY 10461 (pirofski@aecom.yu.edu).
PY - 2009/7/15
Y1 - 2009/7/15
N2 - Background. The role of B cells in resistance to Cryptococcus neoformans disease (i.e., cryptococcosis) is unknown. Given evidence that IgM + memory B cells are required for immunity to other encapsulated pathogens, we hypothesized that these cells might contribute to resistance to cryptococcosis. Methods. We compared levels of IgM expression on memory B cells in 29 HIV-infected individuals who had a history of cryptococcosis (the HIV+CN+ group) with levels in 30 human immunodeficiency virus (HlV)-infected subjects who had no history of cryptococcosis (the HIV+CN- group) and 20 HIV-uninfected subjects who had no history of cryptococcosis (the HIV- group) (cohort 1). We also determined levels of IgM expression on memory B cells in banked samples obtained before cryptococcosis onset from 31 participants in the Multicenter AIDS Cohort Study, of whom 8 had HIV infection and subsequently developed cryptococcosis (the HIV+CN+ group), 8 had HIV infection and did not develop cryptococcosis (the HIV+CN- group), and 15 did not have HIV infection and did not develop cryptococcosis (the HIV- group) (cohort 2). Results. In cohort 1, the percentage of memory B cells that expressed IgM was lower among HIV+CN+ subjects, compared with HIV+CN- subjects (P<.01) and HIV- subjects (P<.05); expression of IgM on =S50% of memory B cells was a significant predictor of C. neoformans disease status (odds ratio, 5.5; P = .03). In cohort 2, the percentage of memory B cells that expressed IgM was lower in HIV+CN+ subjects than in HIV+CNsubjects (P = .02) and HIV- subjects (P<.01); an IgM + memory B cell percentage of =538.5% was a significant predictor of future development of cryptococcosis (odds ratio, 14; P = .02). Conclusions. These findings suggest that HIV-infected persons in whom the percentage of memory B cells that express IgM is decreased might be at greater risk for the development of cryptococcosis.
AB - Background. The role of B cells in resistance to Cryptococcus neoformans disease (i.e., cryptococcosis) is unknown. Given evidence that IgM + memory B cells are required for immunity to other encapsulated pathogens, we hypothesized that these cells might contribute to resistance to cryptococcosis. Methods. We compared levels of IgM expression on memory B cells in 29 HIV-infected individuals who had a history of cryptococcosis (the HIV+CN+ group) with levels in 30 human immunodeficiency virus (HlV)-infected subjects who had no history of cryptococcosis (the HIV+CN- group) and 20 HIV-uninfected subjects who had no history of cryptococcosis (the HIV- group) (cohort 1). We also determined levels of IgM expression on memory B cells in banked samples obtained before cryptococcosis onset from 31 participants in the Multicenter AIDS Cohort Study, of whom 8 had HIV infection and subsequently developed cryptococcosis (the HIV+CN+ group), 8 had HIV infection and did not develop cryptococcosis (the HIV+CN- group), and 15 did not have HIV infection and did not develop cryptococcosis (the HIV- group) (cohort 2). Results. In cohort 1, the percentage of memory B cells that expressed IgM was lower among HIV+CN+ subjects, compared with HIV+CN- subjects (P<.01) and HIV- subjects (P<.05); expression of IgM on =S50% of memory B cells was a significant predictor of C. neoformans disease status (odds ratio, 5.5; P = .03). In cohort 2, the percentage of memory B cells that expressed IgM was lower in HIV+CN+ subjects than in HIV+CNsubjects (P = .02) and HIV- subjects (P<.01); an IgM + memory B cell percentage of =538.5% was a significant predictor of future development of cryptococcosis (odds ratio, 14; P = .02). Conclusions. These findings suggest that HIV-infected persons in whom the percentage of memory B cells that express IgM is decreased might be at greater risk for the development of cryptococcosis.
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U2 - 10.1086/599318
DO - 10.1086/599318
M3 - Article
C2 - 19527168
AN - SCOPUS:67650660981
SN - 0022-1899
VL - 200
SP - 244
EP - 251
JO - Journal of Infectious Diseases
JF - Journal of Infectious Diseases
IS - 2
ER -