title: S100B serum levels are closely correlated with body mass index: an important caveat in neuropsychiatric research.
abstract: Elevated blood levels of S100B in neuropsychiatric disorders have so far been mainly attributed to glial pathologies. However, increases or dysfunction of adipose tissue may be alternatively responsible. Our study assessed S100B serum levels in 60 adult subjects without a prior history of neuropsychiatric disorders. S100B concentrations were closely correlated with the body mass index (BMI, range 18-45 kg/m(2)) as well as levels of leptin and adipocyte-type fatty acid-binding protein (A-FABP/FABP4) that are well-known adipose-related factors. Effect sizes as measured by Cohen's d indicated medium (0.8 > d > 0.5) to strong effects (d > 0.9) of BMI on S100B blood levels. In conclusion, physiological S100B levels in humans appear to closely reflect adipose tissue mass, which should therefore be considered as an important confounding factor in clinical studies examining the role of S100B.
authors.affiliation: Department of Psychiatry, University of Magdeburg, Germany. johann.steiner@med.ovgu.de
authors.forename: Johann
authors.initials: J
authors.lastname: Steiner
authors.forename: Kolja
authors.initials: K
authors.lastname: Schiltz
authors.forename: Martin
authors.initials: M
authors.lastname: Walter
authors.forename: Michael T
authors.initials: MT
authors.lastname: Wunderlich
authors.forename: Gerburg
authors.initials: G
authors.lastname: Keilhoff
authors.forename: Ralf
authors.initials: R
authors.lastname: Brisch
authors.forename: Hendrik
authors.initials: H
authors.lastname: Bielau
authors.forename: Hans-Gert
authors.initials: HG
authors.lastname: Bernstein
authors.forename: Bernhard
authors.initials: B
authors.lastname: Bogerts
authors.forename: Matthias L
authors.initials: ML
authors.lastname: Schroeter
authors.forename: Sabine
authors.initials: S
authors.lastname: Westphal
mesh_terms: D000273:Adipose Tissue / Q000378:metabolism; D000328:Adult; D015992:Body Mass Index; D049628:Body Size / Q000502:physiology; D050556:Fatty Acid-Binding Proteins / Q000097:blood / Q000378:metabolism; D005260:Female; D006801:Humans; D020738:Leptin / Q000097:blood / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D009414:Nerve Growth Factors / Q000097:blood* / Q000378:metabolism; D009484:Neuropsychology / Q000379:methods* / Q000592:standards*; D009765:Obesity / Q000097:blood / Q000378:metabolism; D012107:Research Design; D064568:S100 Calcium Binding Protein beta Subunit; D009418:S100 Proteins / Q000097:blood* / Q000378:metabolism; D055815:Young Adult
chemical_list: C493410:FABP4 protein, human; D050556:Fatty Acid-Binding Proteins; D020738:Leptin; D009414:Nerve Growth Factors; D064568:S100 Calcium Binding Protein beta Subunit; D009418:S100 Proteins; C579160:S100B protein, human