Effect of Switching to Brexpiprazole on Plasma Homovanillic Acid Levels and Antipsychotic-Related Side Effects in Patients with Schizophrenia or Schizoaffective Disorder

Mizue Ichinose,1,2 Itaru Miura,1 Sho Horikoshi,1,3 Shinnosuke Yamamoto,1,4 Keiko Kanno-Nozaki,1 Kenya Watanabe,5 Hirooki Yabe1 1Department of Neuropsychiatry, Fukushima Medical University School of Medicine, Fukushima, Japan; 2Department of Neuropsychiatry, Hoshigaoka Hospital, Koriyama, Japan; 3Dep...

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Autores principales:	Ichinose M, Miura I, Horikoshi S, Yamamoto S, Kanno-Nozaki K, Watanabe K, Yabe H
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2021
Materias:	brexpiprazole extrapyramidal symptoms (eps) homovanillic acid prolactin schizophrenia switching Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571 Neurology. Diseases of the nervous system RC346-429
Acceso en línea:	https://doaj.org/article/9d52df0dba4b479aa09c5914b531c523
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spelling	oai:doaj.org-article:9d52df0dba4b479aa09c5914b531c5232021-12-02T14:38:14ZEffect of Switching to Brexpiprazole on Plasma Homovanillic Acid Levels and Antipsychotic-Related Side Effects in Patients with Schizophrenia or Schizoaffective Disorder1178-2021https://doaj.org/article/9d52df0dba4b479aa09c5914b531c5232021-04-01T00:00:00Zhttps://www.dovepress.com/effect-of-switching-to-brexpiprazole-on-plasma-homovanillic-acid-level-peer-reviewed-article-NDThttps://doaj.org/toc/1178-2021Mizue Ichinose,1,2 Itaru Miura,1 Sho Horikoshi,1,3 Shinnosuke Yamamoto,1,4 Keiko Kanno-Nozaki,1 Kenya Watanabe,5 Hirooki Yabe1 1Department of Neuropsychiatry, Fukushima Medical University School of Medicine, Fukushima, Japan; 2Department of Neuropsychiatry, Hoshigaoka Hospital, Koriyama, Japan; 3Department of Psychiatry, Horikoshi Psychosomatic Clinic, Fukushima, Japan; 4Department of Psychiatry, Fukushima Red Cross Hospital, Fukushima, Japan; 5Department of Pharmacy, Fukushima Medical University Hospital, Fukushima, JapanCorrespondence: Itaru MiuraDepartment of Neuropsychiatry, Fukushima Medical University School of Medicine, Hikarigaoka 1, Fukushima, 960-1295, JapanTel +81-24-547-1331Fax +81-24-548-6735Email itaru@fmu.ac.jpObjective: Although switching antipsychotics is a common strategy in the treatment of schizophrenia, caution is needed because of the risk of worsening of psychosis, particularly when switching to a dopamine D2 partial agonist. Homovanillic acid (HVA), a dopamine metabolite, is thought to be a possible indicator of the response to antipsychotics. We examined the effects of switching to brexpiprazole monotherapy from other antipsychotics on plasma HVA levels and side effects during maintenance treatment of schizophrenia.Methods: The antipsychotics of 37 Japanese patients with schizophrenia or schizoaffective disorder were switched to brexpiprazole for the improvement of side effects. We evaluated clinical symptoms and extrapyramidal symptoms (EPS) and took fasting blood samples at baseline and endpoint (eight weeks after completing the switch) to measure plasma levels of HVA, prolactin, and metabolic parameters.Results: Switching to brexpiprazole significantly decreased the Drug-Induced Extrapyramidal Symptoms Scale total score (p=0.008), prolactin levels (p< 0.001), body weight (p=0.046), and body-mass index (p=0.034), and increased HDL cholesterol (p=0.008). On the other hand, switching to brexpiprazole did not change plasma levels of HVA or Positive and Negative Syndrome Scale scores.Conclusion: Switching to brexpiprazole significantly improved EPS, high prolactin levels, and metabolic side effects without elevating plasma HVA levels. Brexpiprazole may stabilize dopaminergic neural transmission and could be a useful strategy to decrease the burden in patients with schizophrenia during the maintenance phase. Because of the small sample size, further studies with larger sample sizes are needed to confirm and extend our results.Keywords: brexpiprazole, extrapyramidal symptoms, EPS, homovanillic acid, prolactin, schizophrenia, switchingIchinose MMiura IHorikoshi SYamamoto SKanno-Nozaki KWatanabe KYabe HDove Medical Pressarticlebrexpiprazoleextrapyramidal symptoms (eps)homovanillic acidprolactinschizophreniaswitchingNeurosciences. Biological psychiatry. NeuropsychiatryRC321-571Neurology. Diseases of the nervous systemRC346-429ENNeuropsychiatric Disease and Treatment, Vol Volume 17, Pp 1047-1053 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	brexpiprazole extrapyramidal symptoms (eps) homovanillic acid prolactin schizophrenia switching Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571 Neurology. Diseases of the nervous system RC346-429
spellingShingle	brexpiprazole extrapyramidal symptoms (eps) homovanillic acid prolactin schizophrenia switching Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571 Neurology. Diseases of the nervous system RC346-429 Ichinose M Miura I Horikoshi S Yamamoto S Kanno-Nozaki K Watanabe K Yabe H Effect of Switching to Brexpiprazole on Plasma Homovanillic Acid Levels and Antipsychotic-Related Side Effects in Patients with Schizophrenia or Schizoaffective Disorder
description	Mizue Ichinose,1,2 Itaru Miura,1 Sho Horikoshi,1,3 Shinnosuke Yamamoto,1,4 Keiko Kanno-Nozaki,1 Kenya Watanabe,5 Hirooki Yabe1 1Department of Neuropsychiatry, Fukushima Medical University School of Medicine, Fukushima, Japan; 2Department of Neuropsychiatry, Hoshigaoka Hospital, Koriyama, Japan; 3Department of Psychiatry, Horikoshi Psychosomatic Clinic, Fukushima, Japan; 4Department of Psychiatry, Fukushima Red Cross Hospital, Fukushima, Japan; 5Department of Pharmacy, Fukushima Medical University Hospital, Fukushima, JapanCorrespondence: Itaru MiuraDepartment of Neuropsychiatry, Fukushima Medical University School of Medicine, Hikarigaoka 1, Fukushima, 960-1295, JapanTel +81-24-547-1331Fax +81-24-548-6735Email itaru@fmu.ac.jpObjective: Although switching antipsychotics is a common strategy in the treatment of schizophrenia, caution is needed because of the risk of worsening of psychosis, particularly when switching to a dopamine D2 partial agonist. Homovanillic acid (HVA), a dopamine metabolite, is thought to be a possible indicator of the response to antipsychotics. We examined the effects of switching to brexpiprazole monotherapy from other antipsychotics on plasma HVA levels and side effects during maintenance treatment of schizophrenia.Methods: The antipsychotics of 37 Japanese patients with schizophrenia or schizoaffective disorder were switched to brexpiprazole for the improvement of side effects. We evaluated clinical symptoms and extrapyramidal symptoms (EPS) and took fasting blood samples at baseline and endpoint (eight weeks after completing the switch) to measure plasma levels of HVA, prolactin, and metabolic parameters.Results: Switching to brexpiprazole significantly decreased the Drug-Induced Extrapyramidal Symptoms Scale total score (p=0.008), prolactin levels (p< 0.001), body weight (p=0.046), and body-mass index (p=0.034), and increased HDL cholesterol (p=0.008). On the other hand, switching to brexpiprazole did not change plasma levels of HVA or Positive and Negative Syndrome Scale scores.Conclusion: Switching to brexpiprazole significantly improved EPS, high prolactin levels, and metabolic side effects without elevating plasma HVA levels. Brexpiprazole may stabilize dopaminergic neural transmission and could be a useful strategy to decrease the burden in patients with schizophrenia during the maintenance phase. Because of the small sample size, further studies with larger sample sizes are needed to confirm and extend our results.Keywords: brexpiprazole, extrapyramidal symptoms, EPS, homovanillic acid, prolactin, schizophrenia, switching
format	article
author	Ichinose M Miura I Horikoshi S Yamamoto S Kanno-Nozaki K Watanabe K Yabe H
author_facet	Ichinose M Miura I Horikoshi S Yamamoto S Kanno-Nozaki K Watanabe K Yabe H
author_sort	Ichinose M
title	Effect of Switching to Brexpiprazole on Plasma Homovanillic Acid Levels and Antipsychotic-Related Side Effects in Patients with Schizophrenia or Schizoaffective Disorder
title_short	Effect of Switching to Brexpiprazole on Plasma Homovanillic Acid Levels and Antipsychotic-Related Side Effects in Patients with Schizophrenia or Schizoaffective Disorder
title_full	Effect of Switching to Brexpiprazole on Plasma Homovanillic Acid Levels and Antipsychotic-Related Side Effects in Patients with Schizophrenia or Schizoaffective Disorder
title_fullStr	Effect of Switching to Brexpiprazole on Plasma Homovanillic Acid Levels and Antipsychotic-Related Side Effects in Patients with Schizophrenia or Schizoaffective Disorder
title_full_unstemmed	Effect of Switching to Brexpiprazole on Plasma Homovanillic Acid Levels and Antipsychotic-Related Side Effects in Patients with Schizophrenia or Schizoaffective Disorder
title_sort	effect of switching to brexpiprazole on plasma homovanillic acid levels and antipsychotic-related side effects in patients with schizophrenia or schizoaffective disorder
publisher	Dove Medical Press
publishDate	2021
url	https://doaj.org/article/9d52df0dba4b479aa09c5914b531c523
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Effect of Switching to Brexpiprazole on Plasma Homovanillic Acid Levels and Antipsychotic-Related Side Effects in Patients with Schizophrenia or Schizoaffective Disorder

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