Cortisol in schizophrenia : No association with tobacco smoking, clinical symptoms or antipsychotic medication

Nedić Erjavec, Gordana; Uzun, Suzana; Nikolac Perković, Matea; Kozumplik, Oliver; Švob Štrac, Dubravka; Mimica, Ninoslav; Hirasawa-Fujita, Mika; Domino, Edward F.; Pivac, Nela (2017) Cortisol in schizophrenia : No association with tobacco smoking, clinical symptoms or antipsychotic medication. Progress in Neuro-Psychopharmacology, 77 . pp. 228-235. ISSN 0364-7722

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Abstract

Cigarette smoking is associated with higher cortisol levels in healthy subjects. In schizophrenia this relationship is not clear. There are divergent results on the association between cortisol with smoking, clinical symptoms and medication in schizophrenia. This study evaluated this association in 196 Caucasian inpatients with schizophrenia (51.30 ± 26.68 years old), subdivided into 123 smokers and 73 non-smokers. Basal salivary cortisol levels were measured twice, at 08.00 and 09.00 AM, 90–120 min after awakening. The effect of smoking on cortisol was evaluated according to current smoking status, the number of cigarettes/day and the nicotine addiction intensity. The influence of clinical symptoms and/or antipsychotic medication on cortisol was determined using the Positive and Negative Syndrome Scale (PANSS), and chlorpromazine equivalent doses. Non-smokers were older, received lower doses of antipsychotics, had higher PANSS scores, and had longer duration of illness than smokers.Salivary cortisol was similar in schizophrenic patients subdivided according to the smoking status, the number of cigarettes/day and nicotine addiction intensity. No significant correlation was found between salivary cortisol and PANSS scores, chlorpromazine equivalent doses, age of onset or the duration of illness.The findings revealed no association between salivary cortisol and smoking, nicotine addiction intensity, or clinical symptoms. Our preliminary data showed no correlation between salivary cortisol and chlorpromazine equivalent doses and/or antipsychotic medication. Our findings suggest that smoking does not affect the cortisol response in schizophrenic patients as it has been shown in healthy individuals. Future studies should investigate a possible desensitization of the stress system to smoking.

Item Type:	Article
Uncontrolled Keywords:	Antipsychotic medication ; Caucasians ; Chlorpromazine equivalent doses ; Cigarette smoking ; Nicotine addiction ; Salivary cortisol ; Schizophrenia ; Schizophrenia symptoms
Subjects:	BIOMEDICINE AND HEALTHCARE > Basic Medical Sciences
Divisions:	Division of Molecular Medicine
Projects:	Project title Project leader Project code Project type Genomski i glikanski biomarkeri PTSP-a-GlycoGenePTSD Nela Pivac IP-2014-09-4289 HRZZ
Depositing User:	Gordana Nedić Erjavec
Date Deposited:	13 Nov 2018 14:38
URI:	http://fulir.irb.hr/id/eprint/4255
DOI:	10.1016/j.pnpbp.2017.04.032

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