title: Cerebrospinal fluid and plasma oxytocin concentrations are positively correlated and negatively predict anxiety in children.
abstract: The neuropeptide oxytocin (OXT) exerts anxiolytic and prosocial effects in the central nervous system of rodents. A number of recent studies have attempted to translate these findings by investigating the relationships between peripheral (e.g., blood, urinary and salivary) OXT concentrations and behavioral functioning in humans. Although peripheral samples are easy to obtain in humans, whether peripheral OXT measures are functionally related to central OXT activity remains unclear. To investigate a possible relationship, we quantified OXT concentrations in concomitantly collected cerebrospinal fluid (CSF) and blood samples from child and adult patients undergoing clinically indicated lumbar punctures or other CSF-related procedures. Anxiety scores were obtained in a subset of child participants whose parents completed psychometric assessments. Findings from this study indicate that plasma OXT concentrations significantly and positively predict CSF OXT concentrations (r=0.56, P=0.0064, N=27). Moreover, both plasma (r=-0.92, P=0.0262, N=10) and CSF (r=-0.91, P=0.0335, N=10) OXT concentrations significantly and negatively predicted trait anxiety scores, consistent with the preclinical literature. Importantly, plasma OXT concentrations significantly and positively (r=0.96, P=0.0115, N=10) predicted CSF OXT concentrations in the subset of child participants who provided behavioral data. This study provides the first empirical support for the use of blood measures of OXT as a surrogate for central OXT activity, validated in the context of behavioral functioning. These preliminary findings also suggest that impaired OXT signaling may be a biomarker of anxiety in humans, and a potential target for therapeutic development in individuals with anxiety disorders.
authors.affiliation: Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, CA, USA.
authors.forename: D S
authors.initials: DS
authors.lastname: Carson
authors.affiliation: Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, CA, USA.
authors.forename: S W
authors.initials: SW
authors.lastname: Berquist
authors.affiliation: Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, CA, USA.
authors.forename: T H
authors.initials: TH
authors.lastname: Trujillo
authors.affiliation: Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, CA, USA.|Department of Comparative Medicine, Stanford University School of Medicine, Stanford, CA, USA.
authors.forename: J P
authors.initials: JP
authors.lastname: Garner
authors.affiliation: Division of Pediatric Hematology, Department of Pediatrics, Oncology, SCT and Cancer Biology, Stanford University School of Medicine, Stanford, CA, USA.
authors.forename: S L
authors.initials: SL
authors.lastname: Hannah
authors.affiliation: Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, CA, USA.
authors.forename: S A
authors.initials: SA
authors.lastname: Hyde
authors.affiliation: Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, CA, USA.
authors.forename: R D
authors.initials: RD
authors.lastname: Sumiyoshi
authors.affiliation: Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, CA, USA.
authors.forename: L P
authors.initials: LP
authors.lastname: Jackson
authors.affiliation: Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, CA, USA.
authors.forename: J K
authors.initials: JK
authors.lastname: Moss
authors.affiliation: Division of Emergency Medicine, Emergency Department, Stanford University School of Medicine, Stanford, CA, USA.
authors.forename: M C
authors.initials: MC
authors.lastname: Strehlow
authors.affiliation: Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA, USA.
authors.forename: S H
authors.initials: SH
authors.lastname: Cheshier
authors.affiliation: Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, USA.
authors.forename: S
authors.initials: S
authors.lastname: Partap
authors.affiliation: Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, CA, USA.
authors.forename: A Y
authors.initials: AY
authors.lastname: Hardan
authors.affiliation: Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, CA, USA.
authors.forename: K J
authors.initials: KJ
authors.lastname: Parker
mesh_terms: D000293:Adolescent; D000328:Adult; D001007:Anxiety / Q000097:blood* / Q000134:cerebrospinal fluid* / Q000523:psychology; D015415:Biomarkers / Q000097:blood / Q000134:cerebrospinal fluid; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests; D010121:Oxytocin / Q000097:blood* / Q000134:cerebrospinal fluid*; D011237:Predictive Value of Tests; D013223:Statistics as Topic; D055815:Young Adult
chemical_list: D015415:Biomarkers; D010121:Oxytocin