PMID- 38540209 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20240330 IS - 2227-9059 (Print) IS - 2227-9059 (Electronic) IS - 2227-9059 (Linking) VI - 12 IP - 3 DP - 2024 Mar 7 TI - Impact of Pharmacogenetic Testing on Clozapine Treatment Efficacy in Patients with Treatment-Resistant Schizophrenia. LID - 10.3390/biomedicines12030597 [doi] LID - 597 AB - Managing schizophrenia with clozapine poses a significant challenge due to prevalent therapeutic failures. The increasing interest in personalized medicine underscores the importance of integrating pharmacogenetic information for effective pharmacotherapeutic monitoring in patients. The objective of this study was to explore the correlation between DRD2, HTR2A, SLC6A4, CYP1A2, and ABCB1 polymorphisms and clozapine response in 100 patients with Treatment-Resistant Schizophrenia. Different scales such as the Positive and Negative Syndrome Scale (PANSS), the Warwick-Edinburgh Mental Wellbeing Scale (SWEMWBS), the Global Assessment of Functioning Scale (GAF), the Brief Negative Symptom Scale (BNSS), and pharmacokinetic parameters were used to analyse the efficacy of the treatment. Patients who exclusively responded to clozapine compared to the patients with augmentation strategies exhibited distinctive features, such as lower doses, plasma levels, and presented less-pronounced symptomatology. Genetic associations were explored, highlighting SLC6A4, HTR2A, and the *1F/*1F polymorphism for the CYP1A2 gene. FAU - Sanguesa, Estela AU - Sanguesa E AUID- ORCID: 0000-0002-3818-4488 AD - Facultad de Ciencias de la Salud, Universidad San Jorge, Villanueva de Gallego, E-50830 Zaragoza, Spain. FAU - Fernandez-Egea, Emilio AU - Fernandez-Egea E AUID- ORCID: 0000-0003-4128-8955 AD - Cambridgeshire and Peterborough NHS Foundation Trust, Cambridge CB21 5EF, UK. AD - Department of Psychiatry, Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge CB2 0SZ, UK. FAU - Concha, Julia AU - Concha J AUID- ORCID: 0000-0002-6990-8127 AD - Facultad de Ciencias de la Salud, Universidad San Jorge, Villanueva de Gallego, E-50830 Zaragoza, Spain. FAU - Garcia, Cristina B AU - Garcia CB AUID- ORCID: 0000-0002-9036-3483 AD - Facultad de Ciencias de la Salud, Universidad San Jorge, Villanueva de Gallego, E-50830 Zaragoza, Spain. FAU - Ribate, Maria Pilar AU - Ribate MP AUID- ORCID: 0000-0002-1466-0179 AD - Facultad de Ciencias de la Salud, Universidad San Jorge, Villanueva de Gallego, E-50830 Zaragoza, Spain. LA - eng GR - Research Group B58_23R/Gobierno de Aragon/ PT - Journal Article DEP - 20240307 PL - Switzerland TA - Biomedicines JT - Biomedicines JID - 101691304 PMC - PMC10967865 OTO - NOTNLM OT - antipsychotics OT - drug response OT - genetic testing OT - pharmacodynamics OT - pharmacogenetic variants OT - treatment-resistant schizophrenia COIS- E.F.-E. has received consultancy honoraria from Boehringer-Ingelheim (2022), Atheneum (2022) and Rovi (2022), speaker fees by Adamed (2022) and Otsuka (2023) and training and research material from Merz (2020). The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. EDAT- 2024/03/28 06:45 MHDA- 2024/03/28 06:46 PMCR- 2024/03/07 CRDT- 2024/03/28 01:06 PHST- 2024/01/31 00:00 [received] PHST- 2024/02/28 00:00 [revised] PHST- 2024/03/05 00:00 [accepted] PHST- 2024/03/28 06:46 [medline] PHST- 2024/03/28 06:45 [pubmed] PHST- 2024/03/28 01:06 [entrez] PHST- 2024/03/07 00:00 [pmc-release] AID - biomedicines12030597 [pii] AID - biomedicines-12-00597 [pii] AID - 10.3390/biomedicines12030597 [doi] PST - epublish SO - Biomedicines. 2024 Mar 7;12(3):597. doi: 10.3390/biomedicines12030597.