Tobacco smoking in treatment-resistant schizophrenia patients is associated with impaired cognitive functioning, more severe negative symptoms, and poorer social adjustment

Felice Iasevoli, Raffaele Balletta, Valentina Gilardi, Sara Giordano, Andrea de Bartolomeis Unit on Treatment Resistance in Psychiatry and Laboratory of Molecular and Translational Psychiatry, Section of Psychiatry, Department of Neuroscience, Reproductive Sciences and Odontostomatology, University...

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Autores principales:	Iasevoli F, Balletta R, Gilardi V, Giordano S, de Bartolomeis A
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2013
Materias:	Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571 Neurology. Diseases of the nervous system RC346-429
Acceso en línea:	https://doaj.org/article/e414a3d8fa7247fd885dd25621fb3b89
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spelling	oai:doaj.org-article:e414a3d8fa7247fd885dd25621fb3b892021-12-02T02:15:25ZTobacco smoking in treatment-resistant schizophrenia patients is associated with impaired cognitive functioning, more severe negative symptoms, and poorer social adjustment1176-63281178-2021https://doaj.org/article/e414a3d8fa7247fd885dd25621fb3b892013-08-01T00:00:00Zhttp://www.dovepress.com/tobacco-smoking-in-treatment-resistant-schizophrenia-patients-is-assoc-a13946https://doaj.org/toc/1176-6328https://doaj.org/toc/1178-2021Felice Iasevoli, Raffaele Balletta, Valentina Gilardi, Sara Giordano, Andrea de Bartolomeis Unit on Treatment Resistance in Psychiatry and Laboratory of Molecular and Translational Psychiatry, Section of Psychiatry, Department of Neuroscience, Reproductive Sciences and Odontostomatology, University School of Medicine ‘Federico II’, Naples, Italy Abstract: Tobacco smoking is common in schizophrenia patients. It has been reported that schizophrenia patients who are tobacco smokers have better cognitive performances compared to those who are nonsmokers. However, little is known on the effects of tobacco smoking in treatment-resistant schizophrenia (TRS) patients. The aim of this study was to compare cognitive performances, psychotic symptoms, and social adjustment in tobacco smoker TRS patients compared to nonsmoker TRS patients. Smoker and nonsmoker TRS patients did not differ in demographics and in mean daily antipsychotic dose. Smoker TRS patients had significantly higher scores than nonsmoker patients on the positive and negative syndrome scale (PANSS) and on the negative symptoms subscale. These patients also performed worse than nonsmoker patients on problem-solving cognitive domain. Social adjustment was not significantly different between the two groups. In both groups of patients, worse cognitive performances were mostly predicted by higher severity of negative symptoms. Worse performances on the verbal memory and problem-solving cognitive domains were correlated with social-functioning impairment in tobacco smoker TRS patients but not in nonsmoker ones. The results showed that tobacco smoking was not significantly associated with better cognitive performances in TRS patients, while it was significantly associated with higher negative symptoms. Even if a direct causative mechanism cannot be inferred and despite the fact that these patients may use tobacco to self-medicate, it could be speculated that these associations may, at least partially, be related to a tobacco-smoking–induced worsening of abnormal dopamine dysfunction, which has been suggested to occur in TRS patients. Keywords: dopamine, nicotine, psychosis, antipsychotic, cortex, refractoryIasevoli FBalletta RGilardi VGiordano Sde Bartolomeis ADove Medical PressarticleNeurosciences. Biological psychiatry. NeuropsychiatryRC321-571Neurology. Diseases of the nervous systemRC346-429ENNeuropsychiatric Disease and Treatment, Vol 2013, Iss default, Pp 1113-1120 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571 Neurology. Diseases of the nervous system RC346-429
spellingShingle	Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571 Neurology. Diseases of the nervous system RC346-429 Iasevoli F Balletta R Gilardi V Giordano S de Bartolomeis A Tobacco smoking in treatment-resistant schizophrenia patients is associated with impaired cognitive functioning, more severe negative symptoms, and poorer social adjustment
description	Felice Iasevoli, Raffaele Balletta, Valentina Gilardi, Sara Giordano, Andrea de Bartolomeis Unit on Treatment Resistance in Psychiatry and Laboratory of Molecular and Translational Psychiatry, Section of Psychiatry, Department of Neuroscience, Reproductive Sciences and Odontostomatology, University School of Medicine ‘Federico II’, Naples, Italy Abstract: Tobacco smoking is common in schizophrenia patients. It has been reported that schizophrenia patients who are tobacco smokers have better cognitive performances compared to those who are nonsmokers. However, little is known on the effects of tobacco smoking in treatment-resistant schizophrenia (TRS) patients. The aim of this study was to compare cognitive performances, psychotic symptoms, and social adjustment in tobacco smoker TRS patients compared to nonsmoker TRS patients. Smoker and nonsmoker TRS patients did not differ in demographics and in mean daily antipsychotic dose. Smoker TRS patients had significantly higher scores than nonsmoker patients on the positive and negative syndrome scale (PANSS) and on the negative symptoms subscale. These patients also performed worse than nonsmoker patients on problem-solving cognitive domain. Social adjustment was not significantly different between the two groups. In both groups of patients, worse cognitive performances were mostly predicted by higher severity of negative symptoms. Worse performances on the verbal memory and problem-solving cognitive domains were correlated with social-functioning impairment in tobacco smoker TRS patients but not in nonsmoker ones. The results showed that tobacco smoking was not significantly associated with better cognitive performances in TRS patients, while it was significantly associated with higher negative symptoms. Even if a direct causative mechanism cannot be inferred and despite the fact that these patients may use tobacco to self-medicate, it could be speculated that these associations may, at least partially, be related to a tobacco-smoking–induced worsening of abnormal dopamine dysfunction, which has been suggested to occur in TRS patients. Keywords: dopamine, nicotine, psychosis, antipsychotic, cortex, refractory
format	article
author	Iasevoli F Balletta R Gilardi V Giordano S de Bartolomeis A
author_facet	Iasevoli F Balletta R Gilardi V Giordano S de Bartolomeis A
author_sort	Iasevoli F
title	Tobacco smoking in treatment-resistant schizophrenia patients is associated with impaired cognitive functioning, more severe negative symptoms, and poorer social adjustment
title_short	Tobacco smoking in treatment-resistant schizophrenia patients is associated with impaired cognitive functioning, more severe negative symptoms, and poorer social adjustment
title_full	Tobacco smoking in treatment-resistant schizophrenia patients is associated with impaired cognitive functioning, more severe negative symptoms, and poorer social adjustment
title_fullStr	Tobacco smoking in treatment-resistant schizophrenia patients is associated with impaired cognitive functioning, more severe negative symptoms, and poorer social adjustment
title_full_unstemmed	Tobacco smoking in treatment-resistant schizophrenia patients is associated with impaired cognitive functioning, more severe negative symptoms, and poorer social adjustment
title_sort	tobacco smoking in treatment-resistant schizophrenia patients is associated with impaired cognitive functioning, more severe negative symptoms, and poorer social adjustment
publisher	Dove Medical Press
publishDate	2013
url	https://doaj.org/article/e414a3d8fa7247fd885dd25621fb3b89
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Tobacco smoking in treatment-resistant schizophrenia patients is associated with impaired cognitive functioning, more severe negative symptoms, and poorer social adjustment

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