title: Serial study of CD5+ and CD5- B cell subpopulations in 335 HIV seropositive patients.
abstract: B cell subpopulations, as defined by double-labelling techniques with CD5 and CD19 monoclonal antibodies (MoAbs), were serially studied in 335 HIV-1 seropositive patients. At the time of the first consultation, no important modifications in either CD5+ or CD5- subpopulations were observed, whatever the stage of the disease. However, in 18 out of the 335 patients (5.37%), a sharp increase in B cells exceeding 20% and 300/mm3 was observed. This increase in B cells was mainly accounted for CD5-CD19+ B cell subpopulations and was associated with: (i) evolution of the disease, since only four patients presented it at their first consultation (one lymphadenopathy-associated syndrome (LAS) and three AIDS); (ii) advanced stages of disease since, at the time of B cell augmentation, two patients were staged as LAS, four as ARC and 12 as AIDS; (iii) a high incidence of non-Hodgkin's lymphomas (NHL) since three out of the 18 patients presented a histologically confirmed NHL and three others a clinical pattern compatible with this diagnosis. However, in three patients with B hyperlymphocytosis, polymerase chain reaction (PCR) studies of immunoglobulin gene rearrangement revealed the existence of a polyclonal expansion of B cells. These results justify inclusion of a pan-B cell marker in routine phenotypic studies of HIV-infected individuals, as well as the search for NHL among patients presenting this abnormality.
authors.affiliation: Service d'Immunohématologie et d'Immunopathologie, Institut Pasteur, Paris, France.
authors.forename: F
authors.initials: F
authors.lastname: Vuillier
authors.forename: D
authors.initials: D
authors.lastname: Scott-Algara
authors.forename: P
authors.initials: P
authors.lastname: Tortevoye
authors.forename: G
authors.initials: G
authors.lastname: Pialoux
authors.forename: G
authors.initials: G
authors.lastname: Dighiero
mesh_terms: D015703:Antigens, CD / Q000032:analysis*; D018941:Antigens, CD19; D000944:Antigens, Differentiation, B-Lymphocyte / Q000032:analysis; D016175:B-Lymphocyte Subsets / Q000276:immunology*; D001483:Base Sequence; D018956:CD5 Antigens; D006679:HIV Seropositivity / Q000473:pathology*; D006801:Humans; D008969:Molecular Sequence Data
chemical_list: D015703:Antigens, CD; D018941:Antigens, CD19; D000944:Antigens, Differentiation, B-Lymphocyte; D018956:CD5 Antigens