Title: Peripheral blood gene expression of acute phase proteins in people with first episode psychosis
year: 2017
Journal: Brain Behav Immun
Volume: 65
Pages: 337-341
date: Oct
ISSN: 1090-2139 (Electronic);0889-1591 (Linking)
Article Number: 28627459
Keywords: Acute phase proteins;First episode psychosis;Inflammatory marker;Schizophrenia
Abstract: BACKGROUND: There is a growing interest in the association between schizophrenia and the activation of inflammatory system with signs of acute phase (AP) response. Majority of such studies had focused on C-reactive protein (CRP). The aims of the present study were (i) to examine the gene expression profiles of other acute phase proteins (APP), namely haptoglobin (HP), alpha-1 antitrypsin (A1T), and alpha-2 macroglobulin (A2M) in patients with first episode psychosis (FEP) over a period of three months and (ii) to explore the association between APP levels and severity of symptoms. METHODS: In this study, HP, A1T and A2M gene expression levels from whole blood were measured at recruitment, 1- and 3-month follow-up visits using quantitative PCR (qPCR) in 43 patients with FEP and in 57 healthy controls. Diagnoses was ascertained on the Structured Clinical Interview for DSM-IV-TR. Severity of symptoms in patients was assessed on the Positive and Negative Syndrome Scale (PANSS) and a previously validated 5-factor PANSS structure was applied in the subsequent analyses. RESULTS: The FEP sample comprised of 28 (65.1%) individuals with schizophrenia, 12 (27.9%) with schizophreniform disorder and 3 (7%) with schizoaffective disorder. HP gene expression level was noted to be significantly higher in patients than controls at all three time points: recruitment (P=0.049), 1-month follow up (P=0.002) and 3-month follow up (P=0.005). PANSS positive, depression, and excitement symptom factors showed significant associations with HP (P=0.002), A1T (P=0.016) and A2M (P=0.034), respectively. These findings remained significant after controlling for age, gender, smoking status and accumulated chlorpromazine dosage. CONCLUSION: The current study provides information on HP, A1T and A2M gene expression profiles in FEP patients and their associations with psychopathology. This provides support for the hypothesis that inflammation is related to schizophrenia and further encourages studies on immune-inflammatory markers to understand the relationship between inflammation and schizophrenia.
Notes: Yee, Jie Yin;Nurjono, Milawaty;Ng, Wai Yee;Teo, Stephanie Ruth;Lee, Tih-Shih;Lee, Jimmy;eng;Netherlands;2017/06/20 06:00;Brain Behav Immun. 2017 Oct;65:337-341. doi: 10.1016/j.bbi.2017.06.006. Epub 2017 Jun 13.
URL: https://www.ncbi.nlm.nih.gov/pubmed/28627459
URI: https://open-access.imh.com.sg/handle/123456789/5092
Authors Address: Research Division, Institute of Mental Health, Singapore. Electronic address: jie_yin_yee@imh.com.sg.;Saw Swee Hock School of Public Health, National University of Singapore, Singapore.;Research Division, Institute of Mental Health, Singapore.;Neuroscience & Behavioural Disorders, Duke-NUS Medical School, Singapore.;Research Division, Institute of Mental Health, Singapore; Department of General Psychiatry 1, Institute of Mental Health, Singapore.
Appears in Collections:2017

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