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Cytomegalovirus infection associated with lower IQ in adolescent patients with schizophrenia spectrum disorders : A preliminary report

Calkova, Tereza (författare)
Karolinska Institutet,Uppsala universitet,Centrum för klinisk forskning, Västerås
Cervenka, Simon (författare)
Karolinska Institutet,Uppsala universitet,Psykiatri
Yolken, Robert H (författare)
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Andreassen, Ole A (författare)
Andreou, Dimitrios (författare)
Karolinska Institutet
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 (creator_code:org_t)
Elsevier, 2022
2022
Engelska.
Ingår i: Journal of Psychiatric Research. - : Elsevier. - 0022-3956 .- 1879-1379. ; 151, s. 571-574
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • Cytomegalovirus (CMV) infection of immunocompetent hosts is usually inapparent, but typically results in a non-silent chronic latency which is considerably more active than previously considered. In adults with schizophrenia spectrum disorders, CMV latent infection has been associated with cognitive disturbance including lower intelligent quotient (IQ). We hypothesized that the same pattern will be present in adolescent patients with schizophrenia spectrum disorders (early-onset non-affective psychosis). We included 17 adolescents with schizophrenia spectrum disorders (10 patients with schizophrenia, one patient with schizoaffective disorder and six patients with psychosis not otherwise specified), mean age 16.7 years, females 71% and CMV seropositivity 35%. Current IQ was estimated with the Wechsler Abbreviated Scale of Intelligence. CMV immunoglobulin G (IgG) concentrations were measured by solid-phase immunoassays and expressed as dichotomous measures (seropositive/CMV + vs. seronegative/CMV-). CMV + patients (mean IQ 91) had significantly lower full-scale IQ than CMV- patients (mean IQ 110) (20 units difference; p < 0.001). Post-hoc analyses showed that CMV + patients had both lower performance and lower verbal IQ relative to CMV- patients (p = 0.001 and 0.049, respectively). In this preliminary report, we found that CMV IgG seropositivity, reflecting previous CMV infection and current latency, was associated with lower IQ. This may be indicative of an unfavorable impact of CMV infection on general intelligence in early-onset non-affective psychosis.

Ämnesord

MEDICIN OCH HÄLSOVETENSKAP  -- Klinisk medicin -- Psykiatri (hsv//swe)
MEDICAL AND HEALTH SCIENCES  -- Clinical Medicine -- Psychiatry (hsv//eng)

Nyckelord

CMV
Early-onset psychosis
IQ
Schizophrenia spectrum disorders

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