title: HIV-1 specificity of cerebrospinal fluid and serum IgG, IgM, and IgG1-G4 antibodies in relation to clinical disease.
abstract: The reactivities of intrathecal and serum IgG and IgM, and IgG1-4 subclass antibodies to various HIV-1 proteins were assessed by immunoblotting at various stages of HIV-1 infection. All patients were examined neurologically including CT and/or MRI, and with HIV-1-specific and nonspecific tests of the cerebrospinal fluid (CSF). In early infection, the occurrence of anti-gag antibodies in both CSF and serum was higher than that of anti-pol antibodies among all IgG subclasses (P < 0.05). Also in late infection, anti-gag IgG1 response was most frequent (P < 0.04), while anti-gag IgG3 and IgG4 reactivities predominated over similar anti-pol antibodies (P < 0.05, respectively). Of anti-pol reactivities, in the CSF of subjects at early infection anti-p32 IgG and IgG1 antibodies were more frequent than in patients at late stages (P < 0.015). In late infection, however, the occurrence of anti-p64 IgM and IgG2-4 antibodies of both CSF and serum was higher than at early stages (P = 0.014). Regarding anti-env response, in patients with advanced infection, the CSF and serum IgG subclass reactivity against gp120 was restricted to IgG1. The CSF of individual patients with HIV encephalopathy showed a higher or similar occurrence of polyisotypic anti-gag and anti-pol IgG3 antibodies than corresponding serum. These results indicate association between declining frequency of anti-pol p32 and anti-env gp120 antibodies and severity of HIV-1 disease.(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Department of Microbiology and Infectious Diseases, Aurora Hospital, Helsinki, Finland.
authors.forename: I
authors.initials: I
authors.lastname: Elovaara
authors.forename: P S
authors.initials: PS
authors.lastname: Albert
authors.forename: A
authors.initials: A
authors.lastname: Ranki
authors.forename: K
authors.initials: K
authors.lastname: Krohn
authors.forename: I
authors.initials: I
authors.lastname: Seppälä
mesh_terms: D015526:AIDS Dementia Complex / Q000097:blood / Q000134:cerebrospinal fluid / Q000276:immunology*; D000328:Adult; D000918:Antibody Specificity; D005260:Female; D015683:Gene Products, gag / Q000276:immunology*; D015684:Gene Products, pol / Q000276:immunology*; D015483:HIV Antibodies / Q000097:blood / Q000134:cerebrospinal fluid / Q000276:immunology*; D015488:HIV Antigens / Q000276:immunology*; D015497:HIV-1 / Q000276:immunology*; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood / Q000134:cerebrospinal fluid / Q000145:classification / Q000276:immunology*; D007075:Immunoglobulin M / Q000097:blood / Q000134:cerebrospinal fluid / Q000276:immunology*; D008297:Male; D008875:Middle Aged
chemical_list: D015683:Gene Products, gag; D015684:Gene Products, pol; D015483:HIV Antibodies; D015488:HIV Antigens; D007074:Immunoglobulin G; D007075:Immunoglobulin M