title: Mother-child immunological interactions in early life affect long-term humoral autoreactivity to heat shock protein 60 at age 18 years.
abstract: The presence of anti-heat shock protein 60 (Hsp60) antibodies in healthy individuals and the association of these antibodies with diseases such as arthritis and atherosclerosis are well documented. However, there is limited population-level data on interindividual variation in anti-Hsp60 levels. We investigated the influence of early-life factors on IgG reactivity to human Hsp60 at age 18 years. A population-based prospective birth cohort study included 5914 births in the city of Pelotas, Brazil, in 1982. Early-life exposures were documented during home visits in childhood. In 2000, 79% of all males in the cohort were traced. Sera from a systematic 20% sample (411 subjects) were analyzed. Anti-Hsp60 total IgG reactivity was determined by ELISA. Data were analyzed using analysis of variance and generalized linear models. Anti-Hsp60 reactivity was lognormally distributed and showed a significant direct correlation with low birthweight (p=0.039) and total duration of breastfeeding (p=0.018), of which only the latter remained significant after adjustment for potential confounders. Reactivity was not associated with asthma, pneumonia, diarrhea, or early-life malnutrition. Mother-child immunological interactions, rather than infection/disease factors seem to be associated with reactivity to Hsp60 later in life. This is in agreement with the hypothesis that maternal antibodies influence future antibody profile.
authors.affiliation: Laboratory of Immunology, Heart Institute (InCor), University of São Paulo Medical School, Brazil.
authors.forename: Gabriel D
authors.initials: GD
authors.lastname: Victora
authors.forename: Angelina M B
authors.initials: AM
authors.lastname: Bilate
authors.forename: Adalberto
authors.initials: A
authors.lastname: Socorro-Silva
authors.forename: Cristina
authors.initials: C
authors.lastname: Caldas
authors.forename: Rosangela C
authors.initials: RC
authors.lastname: Lima
authors.forename: Jorge
authors.initials: J
authors.lastname: Kalil
authors.forename: Verônica
authors.initials: V
authors.lastname: Coelho
authors.forename: Cesar G
authors.initials: CG
authors.lastname: Victora
mesh_terms: D000293:Adolescent; D001323:Autoantibodies / Q000097:blood*; D001724:Birth Weight; D001938:Brazil; D001942:Breast Feeding; D018834:Chaperonin 60 / Q000276:immunology*; D002648:Child; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood*; D008297:Male; D008431:Maternal-Fetal Exchange; D011247:Pregnancy
chemical_list: D001323:Autoantibodies; D018834:Chaperonin 60; D007074:Immunoglobulin G