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Peeters LD, Wills LJ, Cuozzo AM, Ivanich KL, Turney SE, Bullock LP, Price RM, Gass JT, Brown RW. Modulation of mGlu5 reduces rewarding associative properties of nicotine via changes in mesolimbic plasticity: Relevance to comorbid cigarette smoking in psychosis. Pharmacol Biochem Behav 2024; 239:173752. [PMID: 38521210 PMCID: PMC11088493 DOI: 10.1016/j.pbb.2024.173752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 02/13/2024] [Accepted: 03/20/2024] [Indexed: 03/25/2024]
Abstract
RATIONALE Antipsychotic medications that are used to treat psychosis are often limited in their efficacy by high rates of severe side effects. Treatment success in schizophrenia is further complicated by high rates of comorbid nicotine use. Dopamine D2 heteroreceptor complexes have recently emerged as targets for the development of more efficacious pharmaceutical treatments for schizophrenia. OBJECTIVE The current study sought to explore the use of the positive allosteric modulator of the mGlu5 receptor 3-Cyano-N-(1,3-diphenyl-1H-pyrazol-5-yl)benzamide (CDPPB) as a treatment to reduce symptoms related to psychosis and comorbid nicotine use. METHODS Neonatal treatment of animals with the dopamine D2-like receptor agonist quinpirole (NQ) from postnatal day (P)1-21 produces a lifelong increase in D2 receptor sensitivity, showing relevance to psychosis and comorbid tobacco use disorder. Following an 8-day conditioning paradigm, brain tissue in the mesolimbic pathway was analyzed for several plasticity markers, including brain derived neurotrophic factor (BDNF), phosphorylated p70 ribosomal S6 kinase (phospho-p70S6K), and cadherin-13 (Cdh13). RESULTS Pretreatment with CDPPB was effective to block enhanced nicotine conditioned place preference observed in NQ-treated animals. Pretreatment was additionally effective to block the nicotine-induced increase in BDNF and sex-dependent increases in cadherin-13 in the ventral tegmental area (VTA), as well as increased phospho-p70S6K in the nucleus accumbens (NAcc) shell found in NQ-treated animals. CONCLUSION In conjunction with prior work, the current study suggests positive allosteric modulation of the mGlu5 receptor, an emerging target for schizophrenia therapeutics, may be effective for the treatment of comorbid nicotine abuse in psychosis.
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Affiliation(s)
- Loren D Peeters
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, United States of America
| | - Liza J Wills
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, United States of America
| | - Anthony M Cuozzo
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, United States of America
| | - Kira L Ivanich
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, United States of America
| | - Seth E Turney
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, United States of America
| | - Luke P Bullock
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, United States of America
| | - Robert M Price
- Department of Mathematics and Statistics, East Tennessee State University, Johnson City, TN 37614, United States of America
| | - Justin T Gass
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, United States of America
| | - Russell W Brown
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, United States of America.
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Ma Z, Ma Z. Relationship between stable smoking behavior and cognitive function in male schizophrenia patients. J Psychiatr Res 2024; 173:296-301. [PMID: 38555677 DOI: 10.1016/j.jpsychires.2024.03.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 03/20/2024] [Accepted: 03/22/2024] [Indexed: 04/02/2024]
Abstract
OBJECTIVE To explore the relationship between stable smoking behavior and cognitive function in male schizophrenia patients. METHODS A simple random sampling method is applied to select 120 patients with schizophrenia admitted to a hospital from August 2020 to December 2022 as the subjects. They are divided into two groups based on whether they smoked or not. Their cognitive function is evaluated using the Stroop test (SWCT), continuous task test (CPT), and Chinese version of the Schizophrenic Cognitive Function Battery Test (MCCB). The Spearman correlation analysis is applied to verify the correlation between smoking behavior and SWCT, CPT, and MCCB in patients. Additionally, the Fagerstrom Nicotine Dependence Scale (FTND) is used to evaluate the nicotine dependence degree in smoking group patients. Pearson correlation analysis verifies the correlation between nicotine dependence and SWCT, CPT, MCCB in smoking group patients. RESULTS Among 120 patients include in this study, 3 have symptoms during the trial period, and 1 patient has an error in filling out the questionnaire, all of which are excluded. Finally, 116 valid documents are collected, with an effective recovery rate of 96.67%. According to the SWCT test results, the number of single word errors, single word time, double word errors, and double word time in the smoking group exceed the non-smoking group (P < 0.05). According to the CPT test results, the number of correct reactions in the smoking group is below the non-smoking group. The correct average reaction time, error rate of interference items, and error rate of ineffective items exceed the non-smoking group (P < 0.05). According to the MCCB test results, the scores of connectivity, visual spatial memory, and continuous operation test in the smoking group are below the non-smoking group (P < 0.05). The Spearman correlation analysis results show that stable smoking behavior in male schizophrenia patients is positively correlated with the number of single word errors, double word errors, double word time, correct mean reaction time, interference item error rate, and invalid item error rate (r = 0.216-0.524, P < 0.05). It is also positively correlated with the number of correct reactions, immediate memory, language function, delayed memory, MCCB connectivity, visual spatial memory, and continuous operation (r = -0.212-0.356, P < 0.05). The Pearson correlation analysis results show that the nicotine dependence degree in stable male schizophrenia patients is negatively correlated with monochromatic error count, immediate memory, visual span, attention, and MCCB scores (r = -0.321-0.930, P < 0.05). CONCLUSION Smoking in male schizophrenic patients may have impacts on their cognitive function. This impact worsens as the patient's nicotine dependence increases, especially on their memory function. Effective measures should be taken in clinical practice to correct patients' smoking behavior, reduce their nicotine dependence, and improve their cognitive function.
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Affiliation(s)
- Zhongzi Ma
- Psychiatry, Mental Health Center of Xuhui District, Shanghai 200232, China
| | - Zhongnv Ma
- Functional Laboratory, Basic Medicine College, Binzhou Medical University, Yantai, 264003, China.
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Chen X, Wang S, Shen W. The causal relationship between severe mental illness and risk of lung carcinoma. Medicine (Baltimore) 2024; 103:e37355. [PMID: 38489734 PMCID: PMC10939700 DOI: 10.1097/md.0000000000037355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Revised: 01/31/2024] [Accepted: 02/02/2024] [Indexed: 03/17/2024] Open
Abstract
Observational studies have suggested a link between severe mental illness (SMI) and risk of lung carcinoma (LC); however, causality has not been established. In this study, we conducted a two-sample, two-step Mendelian randomization (MR) investigation to uncover the etiological influence of SMI on LC risk and quantify the mediating effects of known modifiable risk factors. We obtained summary-level datasets for schizophrenia, major depressive disorder (MDD), and bipolar disorder (BD) from the Psychiatric Genomics Consortium (PGC). Data on single nucleotide polymorphisms (SNPs) associated with lung carcinoma (LC) were sourced from a recent large meta-analysis by McKay et al. We employed two-sample MR and two-step MR utilizing the inverse variance weighted method for causal estimation. Sensitivity tests were conducted to validate causal relationships. In two-sample MR, we identified schizophrenia as a risk factor for LC (OR = 1.06, 95% CI 1.02-1.11, P = 3.48E-03), while MDD (OR = 1.18, 95% CI 0.98-1.42, P = .07) and BD (OR = 1.07, 95% CI 0.99-1.15, P = .09) showed no significant association with LC. In the two-step MR, smoking accounted for 24.66% of the schizophrenia-LC risk association, and alcohol consumption explained 7.59% of the effect. Schizophrenia is a risk factor for lung carcinoma, and smoking and alcohol consumption are the mediating factors in this causal relationship. LC screening should be emphasized in individuals with schizophrenia, particularly in those who smoke and consume alcohol regularly.
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Affiliation(s)
- Xiaohan Chen
- The Affiliated Lihuili Hospital, Ningbo University, Ningbo, China
| | - Shudan Wang
- The Affiliated Lihuili Hospital, Ningbo University, Ningbo, China
| | - Weiyu Shen
- The Affiliated Lihuili Hospital, Ningbo University, Ningbo, China
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Elder TR, Turner JR. Nicotine use disorder and Neuregulin 3: Opportunities for precision medicine. ADVANCES IN PHARMACOLOGY (SAN DIEGO, CALIF.) 2024; 99:387-404. [PMID: 38467488 DOI: 10.1016/bs.apha.2023.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/13/2024]
Abstract
Nicotine use disorder remains a major public health emergency despite years of trumpeting the consequences of smoking. This is likely due to the complex interplay of genetics and nicotine exposure across the lifespan of these individuals. Genetics influence all aspects of life, including complex disorders such as nicotine use disorder. This review first highlights the critical neurocircuitry underlying nicotine dependence and withdrawal, and then describes the cellular signaling mechanisms involved. Finally, current genetic, genomic, and transcriptomic evidence for new drug development of smoking cessation aids is discussed, with a focus on the Neuregulin 3 Signaling Pathway.
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Affiliation(s)
- Taylor R Elder
- Department of Pharmaceutical Sciences, University of Kentucky College of Pharmacy, Lexington, KY, United States
| | - Jill R Turner
- Department of Pharmaceutical Sciences, University of Kentucky College of Pharmacy, Lexington, KY, United States.
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Sohal VS. Neurobiology of schizophrenia. Curr Opin Neurobiol 2024; 84:102820. [PMID: 38091860 DOI: 10.1016/j.conb.2023.102820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 10/23/2023] [Accepted: 11/19/2023] [Indexed: 02/18/2024]
Affiliation(s)
- Vikaas S Sohal
- Department of Psychiatry and Behavioral Sciences, Weill Institute for Neurosciences, Kavli Institute for Fundamental Neuroscience, Center for Integrative Neuroscience, University of California, San Francisco, San Francisco, CA 94143-0444, USA.
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Zheng C, Liu H, Tu W, Lin L, Xu H. Hypercoagulable state in patients with schizophrenia: different effects of acute and chronic antipsychotic medications. Ther Adv Psychopharmacol 2023; 13:20451253231200257. [PMID: 37781686 PMCID: PMC10540600 DOI: 10.1177/20451253231200257] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 08/24/2023] [Indexed: 10/03/2023] Open
Abstract
Background Previous studies reported higher incidences of venous thromboembolism and cardiovascular disease in schizophrenia patients and higher indicators of thrombosis, thrombocyte activation, and platelet dysfunction. Objectives To check if first-episode schizophrenia (FES) patients have a hypercoagulable state and determine whether acute and chronic antipsychotics have the same effect on blood coagulation or fibrinolysis-related biomarkers. Design Case-control study. Methods A total of 81 participants were grouped in FES, chronic schizophrenia (CS), and healthy controls (HCs). In addition to demographic data and clinical characteristics, immunological analyses were performed to measure plasma levels of D-dimer, plasminogen activator inhibitor-1 (PAI-1), soluble P selectin (sP-sel), tissue plasminogen activator (tPA), thrombotic precursor protein (TpP), and von Willebrand's disease factor (vWF). Results Compared to HC group, FES patients showed higher PAI-1 (28.61 ng/ml versus 15.69 ng/ml), sP-sel (2.78 ng/ml versus 1.18 ng/ml), and TpP (15.61 µg/ml versus 5.59 µg/ml) along with a higher PAI-1/tPA (3.12 versus 2.00). Acute antipsychotic medication reduced higher PAI-1 (28.61 → 21.99), sP-sel (2.78 → 1.87), tPA (9.59 → 5.83), TpP (15.61 → 10.54), and vWF (383.18 → 291.08) in FES patients. However, plasma sP-sel and vWF in CS patients returned to the pre-treatment levels in FES patients, and PAI-1/tPA significantly decreased compared to FES patients. Conclusion These results suggest a hypercoagulable state in FES patients and demonstrate contrast effects of acute and chronic antipsychotics on coagulation or fibrinolysis in schizophrenia patients.
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Affiliation(s)
- Caiji Zheng
- Mental Health Center of Shantou University, Shantou 515065, China
- Shantou University Medical College - Faculty of Medicine of University of Manitoba Joint Laboratory of Biological Psychiatry, Shantou 515065, China
- Shenzhen Mental Health Center/Shenzhen Kangning Hospital, Shenzhen 518020, China
| | - Haiyan Liu
- Mental Health Center, Shantou University Medical College, Shantou, 515065, China
- Shantou University Medical College - Faculty of Medicine of University of Manitoba Joint Laboratory of Biological Psychiatry, Shantou 515065, China
| | - Weifeng Tu
- Shenzhen Mental Health Center/Shenzhen Kangning Hospital, Shenzhen 518020, China
| | - Lingyun Lin
- Mental Health Center, Shantou University Medical College, Shantou, China
- Mental Health Center of Shantou University, Shantou 515065, China
- Shantou University Medical College - Faculty of Medicine of University of Manitoba Joint Laboratory of Biological Psychiatry, Shantou 515065, China
| | - Haiyun Xu
- School of Mental Health, Zhejiang Provincial Clinical Research Center for Mental Illness, Affiliated Kangning Hospital, Wenzhou Medical University, Wenzhou 325035, China
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Nicotine's effect on cognition, a friend or foe? Prog Neuropsychopharmacol Biol Psychiatry 2023; 124:110723. [PMID: 36736944 DOI: 10.1016/j.pnpbp.2023.110723] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 01/27/2023] [Accepted: 01/29/2023] [Indexed: 02/04/2023]
Abstract
Tobacco smoking is a preventable cause of morbidity and mortality throughout the world. Smoking comes in form of absorption of many compounds, among which nicotine is the main psychoactive component of tobacco and its positive and negative reinforcement effects are proposed to be the key mechanism for the initiation and maintenance of smoking. Growing evidence suggests that the cognitive enhancement effects of nicotine may also contribute to the difficulty of quitting smoking, especially in individuals with psychiatric disorders. In this review, we first introduce the beneficial effect of nicotine on cognition including attention, short-term memory and long-term memory. We next summarize the beneficial effect of nicotine on cognition under pathological conditions, including Alzheimer's disease, Parkinson's disease, Schizophrenia, Stress-induced Anxiety, Depression, and drug-induced memory impairment. The possible mechanism underlying nicotine's effect is also explored. Finally, nicotine's detrimental effect on cognition is discussed, including in the prenatal and adolescent periods, and high-dose nicotine- and withdrawal-induced memory impairment is emphasized. Therefore, nicotine serves as both a friend and foe. Nicotine-derived compounds could be a promising strategy to alleviate neurological disease-associated cognitive deficit, however, due to nicotine's detrimental effect, continued educational programs and public awareness campaigns are needed to reduce tobacco use among pregnant women and smoking should be quitted even if it is e-cigarette, especially for the adolescents.
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Peeters LD, Wills LJ, Cuozzo AM, Ivanich KL, Brown RW. Reinstatement of nicotine conditioned place preference in a transgenerational model of drug abuse vulnerability in psychosis: Impact of BDNF on the saliency of drug associations. Psychopharmacology (Berl) 2023:10.1007/s00213-023-06379-7. [PMID: 37160431 DOI: 10.1007/s00213-023-06379-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 05/01/2023] [Indexed: 05/11/2023]
Abstract
RATIONALE Psychotic disorders such as schizophrenia are often accompanied by high rates of cigarette smoking, reduced quit success, and high relapse rates, negatively affecting patient outcomes. However, the mechanisms underlying altered relapse-like behaviors in psychosis are poorly understood. OBJECTIVES The present study analyzed changes in extinction and reinstatement of nicotine conditioned place preference (CPP) and resulting changes in brain-derived neurotrophic factor (BDNF) in a novel heritable rodent model of psychosis, demonstrating increased dopamine D2 receptor sensitivity, to explore mechanisms contributing to changes in relapse-like behaviors. METHODS Male and female offspring of two neonatal quinpirole-treated (1 mg/kg quinpirole from postnatal day (P)1-21; QQ) and two neonatal saline-treated (SS) Sprague-Dawley rats (F1 generation) were tested on an extended CPP paradigm to analyze extinction and nicotine-primed reinstatement. Brain tissue was analyzed 60 min after the last nicotine injection for BDNF response in the ventral tegmental area (VTA), the infralimbic (IfL) and prelimbic (PrL) cortices. RESULTS F1 generation QQ offspring demonstrated delayed extinction and more robust reinstatement compared to SS control animals. In addition, QQ animals demonstrated an enhanced BDNF response to nicotine in the VTA, IfL and Prl cortices compared to SS offspring. CONCLUSIONS This study is the first to demonstrate altered relapse-like behavior in a heritable rodent model with relevance to comorbid drug abuse and psychosis. This altered pattern of behavior is hypothesized to be related to elevated activity-dependent BDNF in brain areas associated with drug reinforcement during conditioning that persists through the extinction phase, rendering aberrantly salient drug associations resistant to extinction and enhancing relapse vulnerability.
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Affiliation(s)
- Loren D Peeters
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, 37614, USA
| | - Liza J Wills
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, 37614, USA
| | - Anthony M Cuozzo
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, 37614, USA
| | - Kira L Ivanich
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, 37614, USA
| | - Russell W Brown
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN, 37614, USA.
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Wootten JC, Wiener JC, Blanchette PS, Anderson KK. Cancer incidence and stage at diagnosis among people with psychotic disorders: Systematic review and meta-analysis. Cancer Epidemiol 2022; 80:102233. [PMID: 35952461 DOI: 10.1016/j.canep.2022.102233] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 07/20/2022] [Accepted: 07/22/2022] [Indexed: 12/16/2022]
Abstract
Research regarding the incidence of cancer among people with psychotic disorders relative to the general population is equivocal, although the evidence suggests that they have more advanced stage cancer at diagnosis. We conducted a systematic review and meta-analysis to examine the incidence and stage at diagnosis of cancer among people with, relative to those without, psychotic disorders. We searched the MEDLINE, EMBASE, PsycINFO, and CINAHL databases. Articles were included if they reported the incidence and/or stage at diagnosis of cancer in people with psychotic disorders. Random effects meta-analyses were used to determine risk of cancer and odds of advanced stage cancer at diagnosis in people with psychosis, relative to those without psychotic disorders. A total of 40 articles were included in the review, of which, 31 were included in the meta-analyses. The pooled age-adjusted risk ratio for all cancers in people with psychotic disorders was 1.08 (95% CI: 1.01-1.15), relative to those without psychotic disorders, with significant heterogeneity by cancer site. People with psychotic disorders had a higher incidence of breast, oesophageal, colorectal, testicular, uterine, and cervical cancer, and a lower incidence of skin, prostate, and thyroid cancer. People with psychotic disorders also had 22% higher (95% CI: 2-46%) odds of metastases at diagnosis, compared to those without psychotic disorders. Our systematic review found a significant difference in overall cancer incidence among people diagnosed with psychotic disorders and people with psychotic disorders were more likely to present with advanced stage cancer at diagnosis. This finding may reflect a need for improved access to and uptake of cancer screening for patients diagnosed with psychotic disorders.
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Affiliation(s)
- Jared C Wootten
- Department of Epidemiology and Biostatistics, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada.
| | - Joshua C Wiener
- Department of Epidemiology and Biostatistics, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
| | - Phillip S Blanchette
- Department of Epidemiology and Biostatistics, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada; ICES Western, London, Ontario, Canada; Division of Medical Oncology, London Regional Cancer Program, London Health Sciences Centre, London, Ontario, Canada
| | - Kelly K Anderson
- Department of Epidemiology and Biostatistics, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada; ICES Western, London, Ontario, Canada; Department of Psychiatry, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
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Novel disease associations with schizophrenia genetic risk revealed in ~400,000 UK Biobank participants. Mol Psychiatry 2022; 27:1448-1454. [PMID: 34799693 PMCID: PMC9106855 DOI: 10.1038/s41380-021-01387-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 10/18/2021] [Accepted: 10/28/2021] [Indexed: 01/09/2023]
Abstract
Schizophrenia is a serious mental disorder with considerable somatic and psychiatric morbidity. It is unclear whether comorbid health conditions predominantly arise due to shared genetic risk or consequent to having schizophrenia. To explore the contribution of genetic risk for schizophrenia, we analysed the effect of schizophrenia polygenic risk scores (PRS) on a broad range of health problems in 406 929 individuals with no schizophrenia diagnosis from the UK Biobank. Diagnoses were derived from linked health data including primary care, hospital inpatient records, and registers with information on cancer and deaths. Schizophrenia PRS were generated and tested for associations with general health conditions, 16 ICD10 main chapters, and 603 diseases using linear and logistic regressions. Higher schizophrenia PRS was significantly associated with poorer overall health ratings, more hospital inpatient diagnoses, and more unique illnesses. It was also significantly positively associated with 4 ICD10 chapters: mental disorders; respiratory diseases; digestive diseases; and pregnancy, childbirth and the puerperium, but negatively associated with musculoskeletal disorders. Thirty-one specific phenotypes were significantly associated with schizophrenia PRS, and the 19 novel findings include several musculoskeletal diseases, respiratory diseases, digestive diseases, varicose veins, pituitary hyperfunction, and other peripheral nerve disorders. These findings extend knowledge of the pleiotropic effect of genetic risk for schizophrenia and offer insight into how some conditions often comorbid with schizophrenia arise. Additional studies incorporating the genetic basis of hormone regulation and involvement of immune mechanisms in the pathophysiology of schizophrenia may further elucidate the biological mechanisms underlying schizophrenia and its comorbid conditions.
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Miller CL. The Epigenetics of Psychosis: A Structured Review with Representative Loci. Biomedicines 2022; 10:biomedicines10030561. [PMID: 35327363 PMCID: PMC8945330 DOI: 10.3390/biomedicines10030561] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 02/24/2022] [Accepted: 02/26/2022] [Indexed: 02/04/2023] Open
Abstract
The evidence for an environmental component in chronic psychotic disorders is strong and research on the epigenetic manifestations of these environmental impacts has commenced in earnest. In reviewing this research, the focus is on three genes as models for differential methylation, MCHR1, AKT1 and TDO2, each of which have been investigated for genetic association with psychotic disorders. Environmental factors associated with psychotic disorders, and which interact with these model genes, are explored in depth. The location of transcription factor motifs relative to key methylation sites is evaluated for predicted gene expression results, and for other sites, evidence is presented for methylation directing alternative splicing. Experimental results from key studies show differential methylation: for MCHR1, in psychosis cases versus controls; for AKT1, as a pre-existing methylation pattern influencing brain activation following acute administration of a psychosis-eliciting environmental stimulus; and for TDO2, in a pattern associated with a developmental factor of risk for psychosis, in all cases the predicted expression impact being highly dependent on location. Methylation induced by smoking, a confounding variable, exhibits an intriguing pattern for all three genes. Finally, how differential methylation meshes with Darwinian principles is examined, in particular as it relates to the “flexible stem” theory of evolution.
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Kallio M, Korkeila J, Malmberg M, Gunn J, Rautava P, Korhonen P, Kytö V. Impaired long-term outcomes of patients with schizophrenia spectrum disorder after coronary artery bypass surgery: nationwide case-control study. BJPsych Open 2022; 8:e48. [PMID: 35144708 PMCID: PMC8867870 DOI: 10.1192/bjo.2022.10] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Patients with schizophrenia spectrum disorder have increased risk of coronary artery disease. AIMS To investigate long-term outcomes of patients with schizophrenia spectrum disorder and coronary artery disease after coronary artery bypass grafting surgery (CABG). METHOD Data from patients with schizophrenia spectrum disorder (n = 126) were retrospectively compared with propensity-matched (1:20) control patients without schizophrenia spectrum disorder (n = 2520) in a multicentre study in Finland. All patients were treated with CABG. The median follow-up was 7.1 years. The primary outcome was all-cause mortality. RESULTS Patients with diagnosed schizophrenia spectrum disorder had an elevated risk of 10-year mortality after CABG, compared with control patients (42.7 v. 30.3%; hazard ratio 1.56; 95% CI 1.13-2.17; P = 0.008). Schizophrenia spectrum diagnosis was associated with a higher risk of major adverse cardiovascular events during follow-up (49.9 v. 32.6%, subdistribution hazard ratio 1.59; 95% CI 1.18-2.15; P = 0.003). Myocardial infarction (subdistribution hazard ratio 1.86; P = 0.003) and cardiovascular mortality (subdistribution hazard ratio 1.65; P = 0.017) were more frequent in patients with versus those without schizophrenia spectrum disorder, but there was no difference for stroke. Psychiatric ward admission, antipsychotic medication, antidepressant use and benzodiazepine use before CABG were not associated with outcome differences. After CABG, patients with schizophrenia spectrum disorder received statin therapy less often and had lower doses; the use of other cardiovascular medications was similar between schizophrenia spectrum and control groups. CONCLUSIONS Patients with schizophrenia spectrum disorder have higher long-term risks of death and major adverse cardiovascular events after CABG. The results underline the vulnerability of these patients and highlight the importance of intensive secondary prevention and risk factor optimisation.
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Affiliation(s)
- Mika Kallio
- Department of Psychiatry, University of Turku and Turku University Hospital, Finland
| | - Jyrki Korkeila
- Department of Psychiatry, University of Turku and Turku University Hospital, Finland; and Department of Psychiatry, Hospital District of Satakunta, Finland
| | - Markus Malmberg
- Heart Center, Turku University Hospital and University of Turku, Finland
| | - Jarmo Gunn
- Heart Center, Turku University Hospital and University of Turku, Finland
| | - Päivi Rautava
- Department of Public Health, University of Turku, Finland; and Turku Clinical Research Centre, Turku University Hospital, Finland
| | - Päivi Korhonen
- Turku Clinical Research Centre, Turku University Hospital, Finland; and Department of General Practice, University of Turku and Turku University Hospital, Finland
| | - Ville Kytö
- Heart Center, Turku University Hospital and University of Turku, Finland; Research Center of Applied and Preventive Cardiovascular Medicine, University of Turku, Finland; Center for Population Health Research, Turku University Hospital and University of Turku, Finland; Administrative Center, Hospital District of Southwest Finland, Finland; and Department of Public Health, Faculty of Medicine, University of Helsinki, Finland
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Blaylock RL, Faria M. New concepts in the development of schizophrenia, autism spectrum disorders, and degenerative brain diseases based on chronic inflammation: A working hypothesis from continued advances in neuroscience research. Surg Neurol Int 2021; 12:556. [PMID: 34877042 PMCID: PMC8645502 DOI: 10.25259/sni_1007_2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 10/05/2021] [Indexed: 12/14/2022] Open
Abstract
This paper was written prompted by a poignant film about adolescent girl with schizophrenia who babysits for a younger girl in an isolated cabin. Schizophrenia is an illness that both authors are fascinated with and that they continue to study and investigate. There is now compelling evidence that schizophrenia is a very complex syndrome that involves numerous neural pathways in the brain, far more than just dopaminergic and serotonergic systems. One of the more popular theories in recent literature is that it represents a hypo glutaminergic deficiency of certain pathways, including thalamic ones. After much review of research and study in this area, we have concluded that most such theories contain a number of shortcomings. Most are based on clinical responses to certain drugs, particularly antipsychotic drugs affecting the dopaminergic neurotransmitters; thus, assuming dopamine release was the central cause of the psychotic symptoms of schizophrenia. The theory was limited in that dopamine excess could only explain the positive symptoms of the disorder. Antipsychotic medications have minimal effectiveness for the negative and cognitive symptoms associated with schizophrenia. It has been estimated that 20–30% of patients show either a partial or no response to antipsychotic medications. In addition, the dopamine hypothesis does not explain the neuroanatomic findings in schizophrenia.
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Affiliation(s)
| | - Miguel Faria
- Clinical Professor of Surgery (Neurosurgery, ret.) and Adjunct Professor of Medical History (ret.), Mercer University School of Medicine, United States
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Effectiveness of multimodal interventions focused on smoking cessation in patients with schizophrenia: A systematic review. Schizophr Res 2021; 231:145-153. [PMID: 33857662 DOI: 10.1016/j.schres.2021.03.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 03/27/2021] [Indexed: 10/21/2022]
Abstract
BACKGROUND Smoking is a significant risk factor for mortality and morbidity among patients with schizophrenia. OBJECTIVE To clarify the effectiveness of multimodal smoking cessation interventions in adult smokers diagnosed with schizophrenia. METHODS A systematic review was conducted according to PRISMA guidelines. Relevant electronic databases were searched for clinical trials that combined pharmacological and non-pharmacological smoking cessation interventions for patients with schizophrenia, published up to October 2020. Primary outcomes were smoking abstinence and smoking reduction. Secondary outcomes consisted in psychiatric symptoms. RESULTS A final sample of nine articles was obtained from a total of 208 studies. All studies reported higher biochemically validated smoking reduction rates after treatment. However, the majority of the studies reported low smoking abstinence rates, which progressively decreased over time. Multimodal interventions did not worsen psychiatric symptoms. CONCLUSION Evidence suggests that multimodal smoking cessation interventions for individuals diagnosed with schizophrenia should be recommended by clinicians, as they showed to be effective in reducing smoking without worsening psychiatric symptoms. Further studies are needed to understand how interventions can become more effective in helping patients achieve long-term smoking abstinence.
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Iqbal E, Govind R, Romero A, Dzahini O, Broadbent M, Stewart R, Smith T, Kim CH, Werbeloff N, MacCabe JH, Dobson RJB, Ibrahim ZM. The side effect profile of Clozapine in real world data of three large mental health hospitals. PLoS One 2020; 15:e0243437. [PMID: 33290433 PMCID: PMC7723266 DOI: 10.1371/journal.pone.0243437] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 11/22/2020] [Indexed: 12/30/2022] Open
Abstract
OBJECTIVE Mining the data contained within Electronic Health Records (EHRs) can potentially generate a greater understanding of medication effects in the real world, complementing what we know from Randomised control trials (RCTs). We Propose a text mining approach to detect adverse events and medication episodes from the clinical text to enhance our understanding of adverse effects related to Clozapine, the most effective antipsychotic drug for the management of treatment-resistant schizophrenia, but underutilised due to concerns over its side effects. MATERIAL AND METHODS We used data from de-identified EHRs of three mental health trusts in the UK (>50 million documents, over 500,000 patients, 2835 of which were prescribed Clozapine). We explored the prevalence of 33 adverse effects by age, gender, ethnicity, smoking status and admission type three months before and after the patients started Clozapine treatment. Where possible, we compared the prevalence of adverse effects with those reported in the Side Effects Resource (SIDER). RESULTS Sedation, fatigue, agitation, dizziness, hypersalivation, weight gain, tachycardia, headache, constipation and confusion were amongst the highest recorded Clozapine adverse effect in the three months following the start of treatment. Higher percentages of all adverse effects were found in the first month of Clozapine therapy. Using a significance level of (p< 0.05) our chi-square tests show a significant association between most of the ADRs and smoking status and hospital admission, and some in gender, ethnicity and age groups in all trusts hospitals. Later we combined the data from the three trusts hospitals to estimate the average effect of ADRs in each monthly interval. In gender and ethnicity, the results show significant association in 7 out of 33 ADRs, smoking status shows significant association in 21 out of 33 ADRs and hospital admission shows the significant association in 30 out of 33 ADRs. CONCLUSION A better understanding of how drugs work in the real world can complement clinical trials.
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Affiliation(s)
- Ehtesham Iqbal
- The Department of Biostatistics and Health Informatics, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, United Kingdom
| | - Risha Govind
- The Department of Biostatistics and Health Informatics, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, United Kingdom
| | - Alvin Romero
- SLAM BioResource for Mental Health, South London and Maudsley NHS Foundation Trust and King’s College London, London, United Kingdom
| | - Olubanke Dzahini
- Pharmacy Department, South London and Maudsley NHS Foundation Trust, London, United Kingdom
| | - Matthew Broadbent
- NIHR Biomedical Research Centre for Mental Health, South London and Maudsley NHS Foundation, London, United Kingdom
- Biomedical Research Unit for Dementia, South London and Maudsley NHS Foundation, London, United Kingdom
| | - Robert Stewart
- NIHR Biomedical Research Centre for Mental Health, South London and Maudsley NHS Foundation, London, United Kingdom
- Biomedical Research Unit for Dementia, South London and Maudsley NHS Foundation, London, United Kingdom
- Department of Health Service & Population Research, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, United Kingdom
| | - Tanya Smith
- Oxford Health NHS Foundation Trust, Oxford, United Kingdom
- NIHR Oxford Health Biomedical Research Centre, University of Oxford and Oxford Health NHS Foundation Trust, Oxford, United Kingdom
| | - Chi-Hun Kim
- Department of Psychiatry, University of Oxford, Oxford, United Kingdom
| | - Nomi Werbeloff
- UCL Division of Psychiatry, University College London, London, United Kingdom
- Camden and Islington, NHS Foundation Trust, London, United Kingdom
| | - James H. MacCabe
- NIHR Biomedical Research Centre for Mental Health, South London and Maudsley NHS Foundation, London, United Kingdom
- Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, De Crespigny Park, London, United Kingdom
| | - Richard J. B. Dobson
- The Department of Biostatistics and Health Informatics, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, United Kingdom
- NIHR Biomedical Research Centre for Mental Health, South London and Maudsley NHS Foundation, London, United Kingdom
- Biomedical Research Unit for Dementia, South London and Maudsley NHS Foundation, London, United Kingdom
- The Farr Institute of Health Informatics Research, UCL Institute of Health Informatics, University College London, London, United Kingdom
- NIHR Biomedical Research Centre, University College London Hospitals, London, United Kingdom
| | - Zina M. Ibrahim
- The Department of Biostatistics and Health Informatics, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, United Kingdom
- NIHR Biomedical Research Centre for Mental Health, South London and Maudsley NHS Foundation, London, United Kingdom
- Biomedical Research Unit for Dementia, South London and Maudsley NHS Foundation, London, United Kingdom
- The Farr Institute of Health Informatics Research, UCL Institute of Health Informatics, University College London, London, United Kingdom
- NIHR Biomedical Research Centre, University College London Hospitals, London, United Kingdom
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16
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Khan TA, Hussain S, Ikram A, Mahmood S, Riaz H, Jamil A, Amin A, Haider YG, Sandhu M, Mushtaq A, Barbui C, Johnson CF, Godman B. Prevalence and treatment of neurological and psychiatric disorders among tertiary hospitals in Pakistan; findings and implications. Hosp Pract (1995) 2020; 48:145-160. [PMID: 32343632 DOI: 10.1080/21548331.2020.1762366] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
INTRODUCTION Mental health and neurological disorders are prevalent in Pakistan. However, there are considerable concerns with their management due to issues of access, availability of trained personnel and stigma alongside paucity of such data. Consequently, there is a need to document current treatment approaches starting with tertiary hospitals in Pakistan where patients with more severe mental and neurological disorders are typically treated. Subsequently, use the findings to help direct future policies and initiatives. METHODS Multi-centered, cross-sectional, prospective study principally evaluating current medicine usage among patients attending tertiary hospitals in Pakistan with psychiatric and neurological disorders. In addition, possible factors contributing to the prevalence of these disorders in this population to help with future care. All 23 tertiary care hospitals in the ten major Districts in Pakistan were included, which cover 75% of the population. RESULTS 57,664 patients were evaluated of which 35.3% were females. Both females and males had multiple brain disorders and multiple co-morbidities. Schizophrenia was the most prevalent disorder overall among both females (25.2%) and males (30.4%). A median of six medicines were prescribed per patient, with antipsychotics and antidepressants the most prescribed medicines. Clozapine was the most prescribed medicine in males (12.25%) and females (11.83%) including for psychiatric disorders, with sodium valproate the most prescribed medicine in epilepsy in males (42.44% of all anti-epileptic medicines) as well as females (46.38%). There was a greater prevalence of both disorders among the lower classes. A greater prevalence of schizophrenia was seen in patients abusing alcohol and smokers. The divorce rate was higher among the studied patients and the prevalence of depression was higher among the widowed population. CONCLUSIONS There were concerns with the quality of prescribing including the extent of polypharmacy as well as possible overuse of clozapine especially in patients with epilepsy, both of which need addressing.
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Affiliation(s)
- Tanveer Ahmed Khan
- Drugs Control and Traditional Medicines Division, National Institute of Health , Islamabad, Pakistan
| | - Shahzad Hussain
- Drugs Control and Traditional Medicines Division, National Institute of Health , Islamabad, Pakistan
| | - Aamer Ikram
- Drugs Control and Traditional Medicines Division, National Institute of Health , Islamabad, Pakistan
| | - Sidra Mahmood
- Department of Pharmacy, Quaid-e-Azam University , Islamabad, Pakistan
| | - Humayun Riaz
- Department of Pharmaceutics, Rashid Latif College of Pharmacy , Lahore, Pakistan
| | - Ayesha Jamil
- Faculty of Pharmacy, Hajvery University , Lahore, Pakistan
| | - Amina Amin
- Faculty of Pharmacy, Hajvery University , Lahore, Pakistan
| | | | - Marva Sandhu
- Drugs Control and Traditional Medicines Division, National Institute of Health , Islamabad, Pakistan
| | - Atifa Mushtaq
- Drugs Control and Traditional Medicines Division, National Institute of Health , Islamabad, Pakistan
| | - Corrado Barbui
- WHO Collaborating Centre for Research and Training in Mental Health and Service Evaluation, Department of Neuroscience, Biomedicine and Movement Sciences, Section of Psychiatry, University of Verona , Verona, Italy
| | - Chris F Johnson
- Pharmacy Services, National Health Service Greater Glasgow and Clyde (NHS GGC) , Glasgow, UK
| | - Brian Godman
- Department of Laboratory Medicine, Division of Clinical Pharmacology, Karolinska Institute, Karolinska University Hospital Huddinge , Stockholm, Sweden.,Department of Pharmacoepidemiolgy, Strathclyde Institute of Pharmacy and Biomedical Sciences, Strathclyde University , Glasgow, UK.,Health Economics Centre, Liverpool University , Liverpool, UK.,Division of Public Health Pharmacy and Management, School of Pharmacy, Faculty of Health Sciences, Sefako Makgatho Health Sciences University , Pretoria, South Africa
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17
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Strand JE, Nybäck H. Tobacco use in schizophrenia: a study of cotinine concentrations in the saliva of patients and controls. Eur Psychiatry 2020; 20:50-4. [PMID: 15642444 DOI: 10.1016/j.eurpsy.2004.09.005] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2001] [Revised: 08/16/2004] [Accepted: 08/23/2004] [Indexed: 10/26/2022] Open
Abstract
AbstractNicotine has been proposed to provide anxiety relief, oral gratification and self-medication of psychotic symptoms in psychiatric patients. In order to investigate the relations between psychopathology and tobacco use we measured the concentration of cotinine, the major metabolite of nicotine, in the saliva of psychiatric patients and healthy volunteers. In a sample of 42 schizophrenic patients we correlated smoking status, cotinine levels, symptom profiles (PANSS), and neuroleptic side effects (Simpson–Angus). Despite reporting the same amount of cigarettes consumed per day the saliva concentration of cotinine was significantly higher in patients with schizophrenia than in the controls. There were no significant differences in clinical characteristics between smoking and non-smoking schizophrenic patients, but smokers tended to be on higher drug doses. High cotinine concentrations correlated significantly with the negative symptoms Passive withdrawal and Social avoidance. The results indicate that the schizophrenic patients smoke cigarettes more intensely than other patients and healthy subjects. The correlation between high cotinine levels and negative symptomatology may reflect an attempt by schizophrenic patients to overcome the emotional withdrawal and thus the results may lend support to a self-medication hypothesis.
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Affiliation(s)
- Jan-Erik Strand
- Department of Psychiatry, Vasa Central Hospital, Vasa, Finland
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18
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Salokangas RKR, Honkonen T, Stengård E, Koivisto AM, Hietala J. Cigarette smoking in long-term schizophrenia. Eur Psychiatry 2020; 21:219-23. [PMID: 16360309 DOI: 10.1016/j.eurpsy.2005.07.008] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2005] [Accepted: 07/24/2005] [Indexed: 11/22/2022] Open
Abstract
AbstractPurposeCigarette smoking is a great health problem and prevalent among subjects with schizophrenia. Our aim was to investigate the prevalence and associations of cigarette smoking in patients with long-term schizophrenia.MethodsSeven hundred and sixty schizophrenia patients were interviewed and their cigarette smoking was recorded.ResultsSmoking was more prevalent men than in women patients. In logistic regression analysis, male gender, duration of illness (DUI) from 10 to 19 years, being divorced or separated, lower education and high daily doses of neuroleptics (DDN) associated significantly with regular smoking. Heavy smoking associated, in men, with hospital treatment.ConclusionsIn schizophrenia patients, smoking is associated with long DUI, high DDN and institutional care. Interventions for cessation and/or reduction of cigarette smoking should be a part of the treatment for patients with schizophrenia.
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Affiliation(s)
- R K R Salokangas
- Department of Psychiatry, University of Turku Psychiatric Clinic, Turku University Central Hospital, 20520 Turku, Finland.
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19
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Experiences of Tobacco Use among Chinese Individuals with Schizophrenia in Community-Based Residential Settings: A Qualitative Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17010321. [PMID: 31906522 PMCID: PMC6981445 DOI: 10.3390/ijerph17010321] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 12/28/2019] [Accepted: 12/31/2019] [Indexed: 11/17/2022]
Abstract
Although there is a high prevalence of smoking among individuals with schizophrenia, no previous attempt has been made to explore experiences of tobacco use and cessation within a Chinese sample of this population. A qualitative descriptive study was conducted to explore through the use of individual and semi-structured interviews the experiences of tobacco use and quitting in a sample Chinese population with schizophrenia. Twenty-three eligible participants with schizophrenia who currently smoke were recruited from three community residential mental health service settings. Four main themes representing the experiences of the participants were uncovered in this study: (1) smoking and illness; (2) environment and culture; (3) reasons for smoking; and (4) beliefs about cessation methods. The findings indicated that the participants considered the disease to be far more harmful than smoking, and perceived many benefits to smoking. Although some thought of quitting at times, most gave up the idea or failed to quit due to internal factors such as disease-related suffering, the use of an avoidance coping strategy, and a lack of cessation support. The most notable finding concerns the use of avoidance coping by the participants, who relied on smoking as a way to avoid the suffering brought about by the disease.
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20
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Bueno-Antequera J, Munguía-Izquierdo D. Exercise and Schizophrenia. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1228:317-332. [PMID: 32342467 DOI: 10.1007/978-981-15-1792-1_21] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Schizophrenia is a psychiatric disorder characterized by distortions of thinking and perception, with no strictly pathognomonic symptoms that can be divided into positive, negative, and cognitive symptom domains. People with schizophrenia have, between others, a reduced life expectancy and cardiorespiratory and muscular fitness and increased risk of cardiovascular disease, metabolic syndrome, obesity, hypertension, and hyperlipidemia compared to the general population. Furthermore, the economic burden of mental disorders including schizophrenia is evident and it is expected to increase to more than double by 2030. Therefore, reducing the growing burden of mental disorders such as schizophrenia should be a health priority. Improved prevention and treatment are two key factors that may reduce the burden of schizophrenia. Pharmacological- and psychotherapy-based interventions have been traditionally considered for treating schizophrenia disorders; however, there is an increasing amount of scientific evidence confirming that physical activity and physical exercise should be highly considered in prevention and treatment of schizophrenia disorders. In this chapter, we aim to summarize and discuss the research progress of physical activity and exercise in prevention and treatment of schizophrenia disorder. Specifically, we summarized and discussed the research progress of the prognostic use of physical activity for incident schizophrenia; the importance of other outcomes typically improved by physical activity/exercise such as obesity and fitness (cardiorespiratory and muscular fitness) for future schizophrenia; the research progress of the evidence of the benefits of exercise in people with schizophrenia disorders differentiating between effects of exercise on varied health outcomes, cognitive functioning, and cardiorespiratory fitness; and finally the clinical practice recommendations.
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Affiliation(s)
- Javier Bueno-Antequera
- Physical Performance Sports Research Center, Department of Sports and Computer Science, Section of Physical Education and Sports, Faculty of Sports Sciences, Universidad Pablo de Olavide, Seville, Spain.,Research Group in Development Movimiento Humano, Universidad de Zaragoza, Zaragoza, Spain
| | - Diego Munguía-Izquierdo
- Physical Performance Sports Research Center, Department of Sports and Computer Science, Section of Physical Education and Sports, Faculty of Sports Sciences, Universidad Pablo de Olavide, Seville, Spain. .,Research Group in Development Movimiento Humano, Universidad de Zaragoza, Zaragoza, Spain. .,Biomedical Research Networking Center on Frailty and Healthy Aging, Madrid, Spain.
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21
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Qurashi I, Stephenson P, Nagaraj C, Chu S, Drake R, Couchman L, Flanagan R. Changes in smoking status, mental state and plasma clozapine concentration: retrospective cohort evaluation. BJPsych Bull 2019; 43:271-274. [PMID: 31391141 PMCID: PMC8058886 DOI: 10.1192/bjb.2019.50] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
AIMS AND METHOD To investigate the percentage of patients who commenced smoking after transferring out of a non-smoking forensic psychiatric unit, the corresponding clozapine dose adjustments, the effects on plasma clozapine/norclozapine concentrations and observed changes in mental state. We reviewed the notes and plasma clozapine/norclozapine concentrations of 46 patients transferred to medium secure units between July 2008 and December 2013. RESULTS Thirty-five patients commenced smoking. Their median clozapine dose was increased by 50 mg/d. In the non-smokers, the median clozapine dose remained unchanged. Plasma clozapine/norclozapine concentrations were significantly reduced in smokers despite dosage adjustment. Eighteen patients experienced deterioration in mental state after transfer; almost all these patients were smokers. CLINICAL IMPLICATIONS Approximately three-quarters of patients who were non-smokers by virtue of being in a secure non-smoking environment commenced smoking after transfer. Monitoring of clozapine serum levels and assessment of mental state in the immediate period after a change in smoking status is indicated.
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Affiliation(s)
- Inti Qurashi
- High Secure Services, Ashworth High Secure Hospital, UK
| | | | | | - Simon Chu
- Department of Psychology, University of Central Lancashire, UK
| | - Richard Drake
- Division of Psychology and Mental Health, University of Manchester, UK
| | - Lewis Couchman
- Therapeutic Drug Monitoring, Analytical Services International, UK
| | - Robert Flanagan
- Toxicology, King's College Hospital NHS Foundation Trust, UK
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22
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Pearsall R, Smith DJ, Geddes JR. Pharmacological and behavioural interventions to promote smoking cessation in adults with schizophrenia and bipolar disorders: a systematic review and meta-analysis of randomised trials. BMJ Open 2019; 9:e027389. [PMID: 31784428 PMCID: PMC6924825 DOI: 10.1136/bmjopen-2018-027389] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 05/23/2019] [Accepted: 06/03/2019] [Indexed: 01/08/2023] Open
Abstract
OBJECTIVE Smoking in people with serious mental illness is a major public health problem and contributes to significant levels of morbidity and mortality. The aim of the review was to systematically examine the efficacy of methods used to aid smoking cessation in people with serious mental illness. METHOD A systematic review and meta-analysis of randomised controlled trials to compare the effectiveness and safety of pharmacological and behavioural programmes for smoking cessation in people with serious mental illness. Electronic databases were searched for trials to July 2018. We used the Cochrane Collaboration's tool for assessing the risk of bias. RESULTS Twenty-eight randomised controlled trials were identified. Varenicline increased the likelihood of smoking cessation at both 3 months (risk ratio (RR) 3.56, 95% CI 1.82 to 6.96, p=0.0002) and at 6 months (RR 3.69, 95% CI 1.08 to 12.60, p=0.04). Bupropion was effective at 3 months (RR 3.96, 95% CI 1.86 to 8.40, p=0.0003), especially at a dose of 300 mg/day, but there was no evidence of effect at 6 months (RR 2.22, 95% CI 0.52 to 9.47, p=0.28). In one small study, nicotine therapy proved effective at increasing smoking cessation up to a period of 3 months. Bupropion used in conjunction with nicotine replacement therapy showed more effect than single use. Behavioural and bespoke interventions showed little overall benefit. Side effects were found to be low. CONCLUSION The new information of this review was the effectiveness of varenicline for smoking cessation at both 3 and 6 months and the lack of evidence to support the use of both bupropion and nicotine products for sustained abstinence longer than 3 months. Overall, the review found relatively few studies in this population.
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Affiliation(s)
- Robert Pearsall
- Department of Psychiatry, Monklands Hospital, Airdrie, UK
- Institute of Health and Wellbeing, University of Glasgow, Glasgow, UK
| | - Daniel J Smith
- Institute of Health and Wellbeing, University of Glasgow, Glasgow, UK
| | - John R Geddes
- Department of Psychiatry, University of Oxford, Oxford, UK
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23
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Lally J, Spaducci G, Gardner-Sood P, Atakan Z, Greenwood K, Di Forti M, Ismail K, Murphy KC, Smith S, McNeill A, Murray RM, Gaughran F. Tobacco smoking and nicotine dependence in first episode and established psychosis. Asian J Psychiatr 2019; 43:125-131. [PMID: 31132542 DOI: 10.1016/j.ajp.2019.05.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 03/28/2019] [Accepted: 05/02/2019] [Indexed: 01/08/2023]
Abstract
AIM People with psychotic disorders have increased premature mortality in comparison with the general population, with high rates of cigarette use a contributing factor. We aimed to describe the prevalence of cigarette use and nicotine dependence (ND) in first episode psychosis (FEP), and established psychosis; and to investigate associations between clinical symptoms and ND. METHODOLOGY Smoking and clinical data were collected from two cohorts: 181 people with FEP recruited as part of the Physical Health and Substance Use Measures in First Onset Psychosis (PUMP) study and from 432 people with established psychosis recruited as part of the Improving physical health and reducing substance use in psychosis randomised controlled trial (IMPaCT RCT). RESULTS The prevalence of cigarette smoking was 78% in FEP and 62% in established psychosis. Forty nine percent (n = 60) of smokers in the FEP cohort and 69% (n = 183) of smokers with established psychosis were highly nicotine dependent. Being a highly nicotine dependent smoker was significantly associated with higher PANSS positive symptom scores (F = 5.480 p = 0.004), and with decreased scores on the Rosenberg self-esteem scale (F = 3.261, p = 0.039) in established psychosis. There was no diagnostic specificity identified in relation to smoking or ND in both groups. CONCLUSION High rates of cigarette usage and nicotine dependence are problems from the early stages of psychosis. ND is higher in people with established psychosis. Smoking cessation strategies as part of comprehensive management of psychotic disorders at every stage require further development and evaluation.
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Affiliation(s)
- John Lally
- Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King's College London, Denmark Hill, London, UK; Department of Psychiatry, Royal College of Surgeons in Ireland, Beaumont Hospital, Dublin, Ireland; Department of Psychiatry, School of Medicine and Medical Sciences, University College Dublin, St Vincent's University Hospital, Dublin, Ireland; St Vincent's Hospital Fairview, Dublin, Ireland.
| | - Gilda Spaducci
- Addictions Department, Institute of Psychiatry, Psychology & Neuroscience, King's College London, Denmark Hill, London, UK.
| | | | - Zerrin Atakan
- Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King's College London, Denmark Hill, London, UK
| | - Kathryn Greenwood
- Sussex Partnership NHS Foundation Trust, School of Psychology, University of Sussex, Brighton, UK.
| | - Marta Di Forti
- MRC Social, Genetic & Developmental Psychiatry Centre, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK; National Institute for Health Research (NIHR) Mental Health Biomedical Research Centre at South London and Maudsley NHS Foundation Trust and King's College London, UK.
| | - Khalida Ismail
- Psychological Medicine Department, Institute of Psychiatry, Psychology and Neuroscience (IoPPN), King's College London, Denmark Hill, London, UK.
| | - Kieran C Murphy
- Department of Psychiatry, Royal College of Surgeons in Ireland, Beaumont Hospital, Dublin, Ireland.
| | - Shubulade Smith
- Department of Forensic and Neurodevelopmental Science, Institute of Psychiatry, Psychology and Neuroscience, Kings College London, Denmark Hill, London, UK; Forensic Intensive Care Service, South London and Maudsley NHS Foundation Trust, London, UK.
| | - Ann McNeill
- Addictions Department, Institute of Psychiatry, Psychology & Neuroscience, King's College London, Denmark Hill, London, UK.
| | - Robin M Murray
- Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King's College London, Denmark Hill, London, UK; Department of Psychiatry, Experimental Biomedicine and Clinical Neuroscience (BIONEC), University of Palermo, Italy.
| | - Fiona Gaughran
- Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King's College London, Denmark Hill, London, UK; National Psychosis Service, South London and Maudsley NHS Foundation Trust, Reader, Institute of Psychiatry Psychology and Neuroscience, Kings College London, London, UK.
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Cardio-metabolic risk and its management in a cohort of clozapine-treated outpatients. Schizophr Res 2018; 199:367-373. [PMID: 29486959 DOI: 10.1016/j.schres.2018.02.035] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 12/13/2017] [Accepted: 02/19/2018] [Indexed: 01/29/2023]
Abstract
OBJECTIVE To comprehensively assess cardio-metabolic risk factors and their management in a large sample of outpatients treated with clozapine. METHODS Observational cross-sectional study of all clozapine users attending specialized clozapine monitoring outpatient clinics in three public hospitals in Sydney, Australia were approached to participate over the one-year period 01/10/2015-30/09/2016. Cardio-metabolic risk factors including metabolic syndrome, risk for future development of diabetes, smoking, physical activity, nutrition, and prescribed medications were assessed at face-to-face interview and through medical record review. Among patients who had cardio-metabolic risk factors, the proportion receiving appropriate management was assessed. RESULTS Of 451 registered clozapine clinic attenders, 92.2% completed questionnaires and anthropometric measurements. 58.3% met criteria for metabolic syndrome. 79.6% were overweight or obese. 55.9% had blood pressure meeting metabolic syndrome criteria. 46.6% had elevated fasting blood glucose and 55.2% had elevated blood triglycerides. 43.6% were current smokers. Only 10% achieved recommended weekly physical activity levels. Unhealthy food categories were highly consumed. 32.1% were on additional antipsychotics. In the majority of individuals, cardio-metabolic risk factors were untreated or under-treated. CONCLUSIONS Clozapine use was associated with very high rates of cardiovascular and metabolic risk factors, which were frequently under-treated. Management of both physical and mental health should be prioritized. Polypharmacy should be rationalized. Future research should investigate the effectiveness of smoking cessation and lifestyle interventions in this high-risk population.
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Quality of life and social functioning of former long-stay psychiatric patients transferred into the community: a 10 year follow up study. Soc Psychiatry Psychiatr Epidemiol 2018; 53:795-801. [PMID: 29704022 DOI: 10.1007/s00127-018-1520-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 04/13/2018] [Indexed: 10/17/2022]
Abstract
PURPOSE Deinstitutionalisation in Ireland began following the impetus of the successful transfer of psychiatric patients into the community in other countries. This study sought to evaluate the quality of life (QoL) and social functioning (SF) of former long-stay institutionalised patients with severe and enduring mental illness who had been relocated into local community settings and followed up 10 years later. METHOD One month prior to hospital closure, 87 former long-stay psychiatric patients, the majority of whom had a diagnosis of schizophrenia, were assessed on a range of QoL and SF measures. Patients were followed-up 10 years later in the community, to evaluate baseline predictors of quality of life and social functioning. RESULTS Study completers (n = 35) improved significantly on a range of QoL and SF measures over the 10 year period. Specific improvements were noted in domestic skills (t = - 2.8, p < 0.0008), community skills (t = - 4.9, p < 0.001), as well as the activity and social relations measure (t = - 4.1, p < 0.001). Increased social function (t = - 6.3, p < 0.001) and improvement on the social behaviour scale (t = 7.6, p < 0.001) were noted at follow-up. Linear regression analysis found that less social behaviour problems at baseline predicted QoL 10 years later (t = - 2.6, p < 0.02). CONCLUSION This study demonstrated that transfer into the community from an institutional environment was associated with long-term improvements in quality of life and social functioning, even in those who spent many years in the institution. Those who demonstrated the greatest improvement in QoL had less social behavioural problems at baseline assessment, providing further evidence of the success of community living for former long-stay patients.
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Abstract
It has been recognised for many years that patients with psychiatric illnesses, especially schizophrenia, smoke to excess. However, recently there has been a resurgence of interest in the high prevalence of nicotine addiction in patients with schizophrenia. It has become increasingly clear that heavy cigarette smoking is intimately associated with the schizophrenic illness and that this may have implications for the underlying neurobiology of schizophrenia.
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27
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Abstract
Psychiatrists rarely enquire about caffeine intake when assessing patients. This may lead to a failure to identify caffeine-related problems and offer appropriate interventions. Excessive caffeine ingestion leads to symptoms that overlap with those of many psychiatric disorders. Caffeine is implicated in the exacerbation of anxiety and sleep disorders, and people with eating disorders often misuse it. It antagonises adenosine receptors, which may potentiate dopaminergic activity and exacerbate psychosis. In psychiatric in-patients, caffeine has been found to increase anxiety, hostility and psychotic symptoms. Assessment of caffeine intake should form part of routine psychiatric assessment and should be carried out before prescribing hypnotics. Gradual reduction in intake or gradual substitution with caffeine-free alternatives is probably preferable to abrupt cessation. Decaffeinated beverages should be provided on psychiatric wards.
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28
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Exploring online communication about cigarette smoking among Twitter users who self-identify as having schizophrenia. Psychiatry Res 2017; 257:479-484. [PMID: 28841509 PMCID: PMC5877400 DOI: 10.1016/j.psychres.2017.08.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 06/13/2017] [Accepted: 08/01/2017] [Indexed: 12/19/2022]
Abstract
Novel approaches are needed to address elevated tobacco use among people with schizophrenia. This exploratory study examined the frequency, timing, and type of communication about tobacco-related content on Twitter among users who self-identify as having schizophrenia compared with users from the general population. Over a 200-day period from January to July 2016, Twitter users who self-identify as having a schizophrenia spectrum disorder (n = 203) and a randomly selected group of general population control users (n = 173) posted 1,544,122 tweets. Communication frequency did not differ between groups. Tweets containing tobacco-related keywords were extracted. Twitter users with schizophrenia posted significantly more tweets containing any tobacco-related terms (mean = 3.74; SD = 16.3) compared with control users (mean = 0.82; SD = 1.8). A significantly greater proportion of Twitter users with schizophrenia (45%; n = 92) posted tweets containing any tobacco terms compared with control users (30%; n = 52). Schizophrenia users showed significantly greater odds of tweeting about tobacco compared with control users (OR = 1.99; 95% CI 1.29-3.07). These findings suggest that online communication about tobacco may parallel real world trends of elevated tobacco use observed among people with schizophrenia. By showing that Twitter users who self-identify as having schizophrenia discuss tobacco-related content online, popular social media could inform smoking cessation efforts targeting this at-risk group.
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Howells FM, Kingdon DG, Baldwin DS. Current and potential pharmacological and psychosocial interventions for anxiety symptoms and disorders in patients with schizophrenia: structured review. Hum Psychopharmacol 2017; 32. [PMID: 28812313 DOI: 10.1002/hup.2628] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 06/30/2017] [Accepted: 07/11/2017] [Indexed: 12/17/2022]
Abstract
OBJECTIVE Between 30% and 62% of patients with schizophrenia present with co-morbid anxiety disorders that are associated with increased overall burden. Our aim was to summarize current and potential interventions for anxiety in schizophrenia. DESIGN Structured review, summarizing pharmacological and psychosocial interventions used to reduce anxiety in schizophrenia and psychosis. RESULTS Antipsychotics have been shown to reduce anxiety, increase anxiety, or have no effect. These may be augmented with another antipsychotic, anxiolytic, or antidepressant. Novel agents, such as L-theanine, pregabalin, and cycloserine, show promise in attenuating anxiety in schizophrenia. Psychosocial therapies have been developed to reduce the distress of schizophrenia. Cognitive behavioural therapy (CBT) has shown that benefit and refinements in the therapy have been successful, for example, for managing worry in schizophrenia. CBT usually involves more than 16 sessions, as short courses of CBT do not attenuate the presentation of anxiety in schizophrenia. To address time and cost, the development of manualized CBT to address anxiety in schizophrenia is being developed. CONCLUSIONS The presence of coexisting anxiety symptoms and co-morbid anxiety disorders should be ascertained when assessing patients with schizophrenia or other psychoses as a range of pharmacological and psychosocial treatments are available.
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Affiliation(s)
- Fleur M Howells
- Department of Psychiatry, University of Cape Town, Cape Town, South Africa
| | - David G Kingdon
- Department of Psychiatry Faculty of Medicine, University of Southampton, Southampton, UK
| | - David S Baldwin
- Department of Psychiatry, University of Cape Town, Cape Town, South Africa.,Department of Psychiatry Faculty of Medicine, University of Southampton, Southampton, UK
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Li XH, An FR, Ungvari GS, Ng CH, Chiu HFK, Wu PP, Jin X, Xiang YT. Prevalence of smoking in patients with bipolar disorder, major depressive disorder and schizophrenia and their relationships with quality of life. Sci Rep 2017; 7:8430. [PMID: 28814728 PMCID: PMC5559601 DOI: 10.1038/s41598-017-07928-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 07/05/2017] [Indexed: 12/13/2022] Open
Abstract
Few studies have compared the prevalence of smoking between patients with bipolar disorder, major depressive disorder (MDD) and schizophrenia. This study examined the prevalence of smoking and its relationships with demographic and clinical characteristics, and quality of life (QOL) in patients with these psychiatric disorders. A total of 1,102 inpatients were consecutively screened. Psychopathology and QOL were measured with standardized instruments. The prevalence of current smoking in the whole sample was 16.7%; 17.5% in bipolar disorder, 10.6% in MDD and 18.5% in schizophrenia. The rates of smoking in bipolar disorder (p = 0.004, OR = 2.5, 95%CI: 1.3–4.7) and schizophrenia (p = 0.03, OR = 2.0, 95%CI: 1.06–3.8) were significantly higher than in MDD, while no difference was found between bipolar disorder and schizophrenia. Smokers had a higher mental QOL than non-smokers (p = 0.007) in MDD, but no difference was found in the other two groups. Male gender, living alone, higher personal income, older age of onset, health insurance coverage, and first episode was significantly associated with smoking in one or more diagnostic groups. Smoking appears more common in bipolar disorder and schizophrenia than in MDD in China. The figures in all disorders were lower than that reported in most of other countries.
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Affiliation(s)
- Xiao-Hong Li
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing, China.,Unit of Psychiatry, Faculty of Health Sciences, University of Macau, Macao, SAR, China
| | - Feng-Rong An
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing, China
| | - Gabor S Ungvari
- The University of Notre Dame Australia/Marian Centre, Perth, Australia.,School of Psychiatry & Clinical Neurosciences, University of Western Australia, Perth, Australia
| | - Chee H Ng
- Department of Psychiatry, University of Melbourne, Melbourne, Victoria, Australia
| | - Helen F K Chiu
- Department of Psychiatry, Chinese University of Hong Kong, Hong Kong, SAR, China
| | - Ping-Ping Wu
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing, China
| | - Xin Jin
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing, China
| | - Yu-Tao Xiang
- Unit of Psychiatry, Faculty of Health Sciences, University of Macau, Macao, SAR, China.
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31
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Li Y, Hou CL, Ma XR, Zhong BL, Zang Y, Jia FJ, Lin YQ, Lai KYC, Chiu HFK, Ungvari GS, Hall BJ, Cai MY, Ng CH, Xiang YT. Quality of life in Chinese patients with schizophrenia treated in primary care. Psychiatry Res 2017; 254:80-84. [PMID: 28456026 DOI: 10.1016/j.psychres.2017.04.049] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 02/26/2017] [Accepted: 04/23/2017] [Indexed: 11/17/2022]
Abstract
In China, maintenance treatment for clinically stable patients with schizophrenia is usually provided by primary care physicians. This study examined the quality of life (QOL) in patients with schizophrenia treated in primary care and explored the demographic and clinical characteristics associated with QOL. Altogether, 612 patients with schizophrenia treated in 22 randomly selected primary care services in China formed the study sample. QOL, psychotic and depressive symptoms, extra-pyramidal symptoms and insight were assessed using standardized instruments. Data analyses were conducted with the one sample t-test and multiple linear regression analyses. Compared with the normative data for the Chinese general population, significantly lower scores in physical and mental QOL domains were found in the patient group. Older age, being unemployed, major medical conditions, no smoking, more severe depressive and negative symptoms, more frequent insomnia, and suicidality were independently associated with poor physical QOL. Male gender, more severe depressive and anxiety symptoms, more frequent insomnia, and suicidality were independently associated with poor mental QOL. Patients with schizophrenia treated in primary care had lower level of QOL in comparison with general population. Effective measures need to be implemented to improve their QOL.
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Affiliation(s)
- Yan Li
- The National Clinical Research Center for Mental Disorders, China & Mood Disorders Center, Beijing Anding Hospital, Capital Medical University, Beijing, China; Department of Psychiatry, the Chinese University of Hong Kong, Hong Kong SAR, China
| | - Cai-Lan Hou
- Guangdong Mental Health Center, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangdong Province, China
| | - Xin-Rong Ma
- Ningxia Mental Health Center, Ningxia Ning-An Hospital, Ningxia Province, China
| | - Bao-Liang Zhong
- The Affiliated Mental Health Center, Tongji Medical College of Huazhong University of Science & Technology, Wuhan, China
| | - Yu Zang
- Shenzhen Key Laboratory for Psychological Healthcare & Shenzhen Institute of Mental Health, Shenzhen Kangning Hospital & Shenzhen Mental Health Center, Shenzhen, China
| | - Fu-Jun Jia
- Guangdong Mental Health Center, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangdong Province, China.
| | - Yong-Qiang Lin
- Guangdong Mental Health Center, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangdong Province, China
| | - Kelly Y C Lai
- Department of Psychiatry, the Chinese University of Hong Kong, Hong Kong SAR, China
| | - Helen F K Chiu
- Department of Psychiatry, the Chinese University of Hong Kong, Hong Kong SAR, China
| | - Gabor S Ungvari
- The University of Notre Dame Australia/Marian Centre, Perth, Australia; School of Psychiatry & Clinical Neurosciences, University of Western Australia, Perth, Australia
| | - Brian J Hall
- Global and Community Mental Health Research Group, Department of Psychology, University of Macau, Macao SAR, China; Department of Health, Behavior and Society, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Mei-Ying Cai
- Guangzhou Yuexiu Center for Disease Control and Prevention, Guangdong Province, China
| | - Chee H Ng
- Department of Psychiatry, University of Melbourne, Melbourne, Victoria, Australia.
| | - Yu-Tao Xiang
- Unit of Psychiatry, Faculty of Health Sciences, University of Macau, Macao SAR, China
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McDonell MG, Leickly E, McPherson S, Skalisky J, Srebnik D, Angelo F, Vilardaga R, Nepom JR, Roll JM, Ries RK. A Randomized Controlled Trial of Ethyl Glucuronide-Based Contingency Management for Outpatients With Co-Occurring Alcohol Use Disorders and Serious Mental Illness. Am J Psychiatry 2017; 174:370-377. [PMID: 28135843 PMCID: PMC5378651 DOI: 10.1176/appi.ajp.2016.16050627] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE The authors examined whether a contingency management intervention using the ethyl glucuronide (EtG) alcohol biomarker resulted in increased alcohol abstinence in outpatients with co-occurring serious mental illnesses. Secondary objectives were to determine whether contingency management was associated with changes in heavy drinking, treatment attendance, drug use, cigarette smoking, psychiatric symptoms, and HIV-risk behavior. METHOD Seventy-nine (37% female, 44% nonwhite) outpatients with serious mental illness and alcohol dependence receiving treatment as usual completed a 4-week observation period and were randomly assigned to 12 weeks of contingency management for EtG-negative urine samples and addiction treatment attendance, or reinforcement only for study participation. Contingency management included the variable magnitude of reinforcement "prize draw" procedure contingent on EtG-negative samples (<150 ng/mL) three times a week and weekly gift cards for outpatient treatment attendance. Urine EtG, drug test, and self-report outcomes were assessed during the 12-week intervention and 3-month follow-up periods. RESULTS Contingency management participants were 3.1 times (95% CI=2.2-4.5) more likely to submit an EtG-negative urine test during the 12-week intervention period, attaining nearly 1.5 weeks of additional alcohol abstinence compared with controls. Contingency management participants had significantly lower mean EtG levels, reported less drinking and fewer heavy drinking episodes, and were more likely to submit stimulant-negative urine and smoking-negative breath samples, compared with controls. Differences in self-reported alcohol use were maintained at the 3-month follow-up. CONCLUSIONS This is the first randomized trial utilizing an accurate and validated biomarker (EtG) to demonstrate the efficacy of contingency management for alcohol dependence in outpatients with serious mental illness.
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Affiliation(s)
- Michael G. McDonell
- Initiative for Research and Education to Advance Community Health, Washington State University, Spokane WA,Elson S. Floyd College of Medicine, Washington State University, Spokane WA,Program for Excellence in Addiction Research, Washington State University, Spokane WA
| | - Emily Leickly
- Initiative for Research and Education to Advance Community Health, Washington State University, Spokane WA,Program for Excellence in Addiction Research, Washington State University, Spokane WA
| | - Sterling McPherson
- Elson S. Floyd College of Medicine, Washington State University, Spokane WA,Program for Excellence in Addiction Research, Washington State University, Spokane WA,Providence Medical Research Center, Providence Health Care, Spokane WA
| | - Jordan Skalisky
- Initiative for Research and Education to Advance Community Health, Washington State University, Spokane WA,Program for Excellence in Addiction Research, Washington State University, Spokane WA
| | - Debra Srebnik
- Department of Psychiatry and Behavioral Sciences, University of Washington School of Medicine, Seattle WA
| | - Frank Angelo
- School of Public Health, University of Washington, Seattle WA
| | - Roger Vilardaga
- Department of Psychiatry and Behavioral Sciences, University of Washington School of Medicine, Seattle WA
| | - Jenny R. Nepom
- Initiative for Research and Education to Advance Community Health, Washington State University, Spokane WA,Program for Excellence in Addiction Research, Washington State University, Spokane WA
| | - John M. Roll
- Elson S. Floyd College of Medicine, Washington State University, Spokane WA,Program for Excellence in Addiction Research, Washington State University, Spokane WA
| | - Richard K. Ries
- Department of Psychiatry and Behavioral Sciences, University of Washington School of Medicine, Seattle WA
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King D, Iwuagwu C, Cook J, McDonald IM, Mate R, Zusi FC, Hill MD, Fang H, Zhao R, Wang B, Easton AE, Miller R, Post-Munson D, Knox RJ, Gallagher L, Westphal R, Molski T, Fan J, Clarke W, Benitex Y, Lentz KA, Denton R, Morgan D, Zaczek R, Lodge NJ, Bristow LJ, Macor JE, Olson RE. BMS-933043, a Selective α7 nAChR Partial Agonist for the Treatment of Cognitive Deficits Associated with Schizophrenia. ACS Med Chem Lett 2017; 8:366-371. [PMID: 28337332 DOI: 10.1021/acsmedchemlett.7b00032] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2017] [Accepted: 02/08/2017] [Indexed: 12/19/2022] Open
Abstract
The therapeutic treatment of negative symptoms and cognitive dysfunction associated with schizophrenia is a significant unmet medical need. Preclinical literature indicates that α7 neuronal nicotinic acetylcholine (nACh) receptor agonists may provide an effective approach to treating cognitive dysfunction in schizophrenia. We report herein the discovery and evaluation of 1c (BMS-933043), a novel and potent α7 nACh receptor partial agonist with high selectivity against other nicotinic acetylcholine receptor subtypes (>100-fold) and the 5-HT3A receptor (>300-fold). In vivo activity was demonstrated in a preclinical model of cognitive impairment, mouse novel object recognition. BMS-933043 has completed Phase I clinical trials.
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Affiliation(s)
- Dalton King
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Christiana Iwuagwu
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Jim Cook
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Ivar M. McDonald
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Robert Mate
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - F. Christopher Zusi
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Matthew D. Hill
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Haiquan Fang
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Rulin Zhao
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Bei Wang
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Amy E. Easton
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Regina Miller
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Debra Post-Munson
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Ronald J. Knox
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Lizbeth Gallagher
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Ryan Westphal
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Thaddeus Molski
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Jingsong Fan
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Wendy Clarke
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Yulia Benitex
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Kimberley A. Lentz
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Rex Denton
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Daniel Morgan
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Robert Zaczek
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Nicholas J. Lodge
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Linda J. Bristow
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - John E. Macor
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
| | - Richard E. Olson
- Research and Development, Bristol-Myers Squibb, 5 Research Parkway, Wallingford, Connecticut 06492, United States
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Peterson DJ, Gill WD, Dose JM, Hoover DB, Pauly JR, Cummins ED, Burgess KC, Brown RW. The effects of nicotine in the neonatal quinpirole rodent model of psychosis: Neural plasticity mechanisms and nicotinic receptor changes. Behav Brain Res 2017; 325:17-24. [PMID: 28235586 DOI: 10.1016/j.bbr.2017.02.029] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 02/16/2017] [Accepted: 02/18/2017] [Indexed: 01/06/2023]
Abstract
Neonatal quinpirole (NQ) treatment to rats increases dopamine D2 receptor sensitivity persistent throughout the animal's lifetime. In Experiment 1, we analyzed the role of α7 and α4β2 nicotinic receptors (nAChRs) in nicotine behavioral sensitization and on the brain-derived neurotrophic factor (BDNF) response to nicotine in NQ- and neonatally saline (NS)-treated rats. In Experiment 2, we analyzed changes in α7 and α4β2 nAChR density in the nucleus accumbens (NAcc) and dorsal striatum in NQ and NS animals sensitized to nicotine. Male and female Sprague-Dawley rats were neonatally treated with quinpirole (1mg/kg) or saline from postnatal days (P)1-21. Animals were given ip injections of either saline or nicotine (0.5mg/kg free base) every second day from P33 to P49 and tested on behavioral sensitization. Before each injection, animals were ip administered the α7 nAChR antagonist methyllycaconitine (MLA; 2 or 4mg/kg) or the α4β2 nAChR antagonist dihydro beta erythroidine (DhβE; 1 or 3mg/kg). Results revealed NQ enhanced nicotine sensitization that was blocked by DhβE. MLA blocked the enhanced nicotine sensitization in NQ animals, but did not block nicotine sensitization. NQ enhanced the NAcc BDNF response to nicotine which was blocked by both antagonists. In Experiment 2, NQ enhanced nicotine sensitization and enhanced α4β2, but not α7, nAChR upregulation in the NAcc. These results suggest a relationship between accumbal BDNF and α4β2 nAChRs and their role in the behavioral response to nicotine in the NQ model which has relevance to schizophrenia, a behavioral disorder with high rates of tobacco smoking.
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Affiliation(s)
- Daniel J Peterson
- Department of Psychology, East Tennessee State University, Johnson City, TN 37614, United States
| | - W Drew Gill
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, United States
| | - John M Dose
- Department of Psychology, St. Norbert College, De Pere, WI, 54115,United States
| | - Donald B Hoover
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, United States
| | - James R Pauly
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, United States
| | - Elizabeth D Cummins
- Department of Psychology, East Tennessee State University, Johnson City, TN 37614, United States
| | - Katherine C Burgess
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, United States
| | - Russell W Brown
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, United States.
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35
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Iwuagwu C, King D, McDonald IM, Cook J, Zusi FC, Hill MD, Mate RA, Fang H, Knox R, Gallagher L, Post-Munson Amy Easton D, Miller R, Benitex Y, Siuciak J, Lodge N, Zaczek R, Morgan D, Bristow L, Macor JE, Olson RE. Design and synthesis of a novel series of 4-heteroarylamino-1'-azaspiro[oxazole-5,3'-bicyclo[2.2.2]octanes as α7 nicotinic receptor agonists 2. Development of 4-heteroaryl SAR. Bioorg Med Chem Lett 2017; 27:1261-1266. [PMID: 28169167 DOI: 10.1016/j.bmcl.2017.01.058] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 01/12/2017] [Accepted: 01/13/2017] [Indexed: 12/18/2022]
Abstract
Quinuclidine-containing spirooxazolines, as described in the previous report in this series, were demonstrated to have utility as α7 nicotinic acetylcholine receptor (α7 nAChR) partial agonists. In this work, the SAR of this chemotype was expanded to include an array of diazine heterocyclic substitutions. Many of the heterocyclic analogs were potent partial agonists of the α7 receptor, selective against other nicotinic receptors and the serotinergic 5HT3A receptor. (1'S,3'R,4'S)-N-(6-phenylpyrimidin-4-yl)-4H-1'-azaspiro[oxazole-5,3'-bicyclo[2.2.2]octan]-2-amine, a potent and selective α7 nAChR partial agonist, was demonstrated to improve cognition in the mouse novel object recognition (NOR) model of episodic memory.
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Affiliation(s)
- Christiana Iwuagwu
- Bristol-Myers Squibb Pharmaceutical Research Institute, 5 Research Parkway, Wallingford, CT 06492-7660, USA.
| | - Dalton King
- Bristol-Myers Squibb Pharmaceutical Research Institute, 5 Research Parkway, Wallingford, CT 06492-7660, USA
| | - Ivar M McDonald
- Bristol-Myers Squibb Pharmaceutical Research Institute, 5 Research Parkway, Wallingford, CT 06492-7660, USA
| | - James Cook
- Bristol-Myers Squibb Pharmaceutical Research Institute, 5 Research Parkway, Wallingford, CT 06492-7660, USA
| | - F Christopher Zusi
- Bristol-Myers Squibb Pharmaceutical Research Institute, 5 Research Parkway, Wallingford, CT 06492-7660, USA
| | - Matthew D Hill
- Bristol-Myers Squibb Pharmaceutical Research Institute, 5 Research Parkway, Wallingford, CT 06492-7660, USA
| | - Robert A Mate
- Bristol-Myers Squibb Pharmaceutical Research Institute, 5 Research Parkway, Wallingford, CT 06492-7660, USA
| | - Haiquan Fang
- Bristol-Myers Squibb Pharmaceutical Research Institute, 5 Research Parkway, Wallingford, CT 06492-7660, USA
| | - Ronald Knox
- Bristol-Myers Squibb Pharmaceutical Research Institute, 5 Research Parkway, Wallingford, CT 06492-7660, USA
| | - Lizbeth Gallagher
- Bristol-Myers Squibb Pharmaceutical Research Institute, 5 Research Parkway, Wallingford, CT 06492-7660, USA
| | | | - Regina Miller
- Bristol-Myers Squibb Pharmaceutical Research Institute, 5 Research Parkway, Wallingford, CT 06492-7660, USA
| | - Yulia Benitex
- Bristol-Myers Squibb Pharmaceutical Research Institute, 5 Research Parkway, Wallingford, CT 06492-7660, USA
| | - Judy Siuciak
- Bristol-Myers Squibb Pharmaceutical Research Institute, 5 Research Parkway, Wallingford, CT 06492-7660, USA
| | - Nicholas Lodge
- Bristol-Myers Squibb Pharmaceutical Research Institute, 5 Research Parkway, Wallingford, CT 06492-7660, USA
| | - Robert Zaczek
- Bristol-Myers Squibb Pharmaceutical Research Institute, 5 Research Parkway, Wallingford, CT 06492-7660, USA
| | - Daniel Morgan
- Bristol-Myers Squibb Pharmaceutical Research Institute, 5 Research Parkway, Wallingford, CT 06492-7660, USA
| | - Linda Bristow
- Bristol-Myers Squibb Pharmaceutical Research Institute, 5 Research Parkway, Wallingford, CT 06492-7660, USA
| | - John E Macor
- Bristol-Myers Squibb Pharmaceutical Research Institute, 5 Research Parkway, Wallingford, CT 06492-7660, USA
| | - Richard E Olson
- Bristol-Myers Squibb Pharmaceutical Research Institute, 5 Research Parkway, Wallingford, CT 06492-7660, USA
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Gage SH, Jones HJ, Taylor AE, Burgess S, Zammit S, Munafò MR. Investigating causality in associations between smoking initiation and schizophrenia using Mendelian randomization. Sci Rep 2017; 7:40653. [PMID: 28102331 PMCID: PMC5244403 DOI: 10.1038/srep40653] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Accepted: 12/09/2016] [Indexed: 11/08/2022] Open
Abstract
Smoking is strongly associated with schizophrenia. Although it has been widely assumed that this reflects self-medication, recent studies suggest that smoking may be a risk factor for schizophrenia. We performed two-sample bi-directional Mendelian randomization using summary level genomewide association data from the Tobacco And Genetics Consortium and Psychiatric Genomics Consortium. Variants associated with smoking initiation and schizophrenia were combined using an inverse-variance weighted fixed-effects approach. We found evidence consistent with a causal effect of smoking initiation on schizophrenia risk (OR 1.73, 95% CI 1.30-2.25, p < 0.001). However, after relaxing the p-value threshold to include variants from more than one gene and minimize the potential impact of pleiotropy, the association was attenuated (OR 1.03, 95% CI 0.97-1.09, p = 0.32). There was little evidence in support of a causal effect of schizophrenia on smoking initiation (OR 1.01, 95% CI 0.98-1.04, p = 0.32). MR Egger regression sensitivity analysis indicated no evidence for pleiotropy in the effect of schizophrenia on smoking initiation (intercept OR 1.01, 95% CI 0.99-1.02, p = 0.49). Our findings provide little evidence of a causal association between smoking initiation and schizophrenia, in either direction. However, we cannot rule out a causal effect of smoking on schizophrenia related to heavier, lifetime exposure, rather than initiation.
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Affiliation(s)
- Suzanne H. Gage
- MRC Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
- UK Centre for Tobacco and Alcohol Studies, School of Experimental Psychology, University of Bristol, Bristol, UK
| | - Hannah J. Jones
- MRC Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
- School of Social and Community Medicine, University of Bristol, Bristol, UK
| | - Amy E. Taylor
- MRC Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
- UK Centre for Tobacco and Alcohol Studies, School of Experimental Psychology, University of Bristol, Bristol, UK
| | - Stephen Burgess
- MRC Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
- Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Stanley Zammit
- School of Social and Community Medicine, University of Bristol, Bristol, UK
- MRC Centre for Neuropsychiatric Genetics and Genomics, Cardiff University, Cardiff, UK
| | - Marcus R. Munafò
- MRC Integrative Epidemiology Unit (IEU) at the University of Bristol, Bristol, UK
- UK Centre for Tobacco and Alcohol Studies, School of Experimental Psychology, University of Bristol, Bristol, UK
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Clark V, Baker A, Lewin T, Richmond R, Kay-Lambkin F, Filia S, Castle D, Williams J, Todd J. Self-Reported Reasons for Smoking: Predicting Abstinence and Implications for Smoking Cessation Treatments Among Those With a Psychotic Disorder. J Dual Diagn 2017; 13:6-14. [PMID: 27982748 DOI: 10.1080/15504263.2016.1271489] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
OBJECTIVES People living with a psychotic illness have higher rates of cigarette smoking and face unique barriers to quitting compared to the general population. We examined whether self-reported reasons for smoking are useful predictors of successful quit attempts among people with psychosis. METHODS As part of a randomized controlled trial addressing smoking and cardiovascular disease risk behaviors among people with psychosis, self-reported reasons for smoking were assessed at baseline (n = 235), 15 weeks (n = 151), and 12 months (n = 139). Three factors from the Reasons for Smoking Questionnaire (Coping, Physiological, and Stimulation/Activation) were entered into a model to predict short- and long-term abstinence. The relationship between these factors and mental health symptoms were also assessed. RESULTS Participants scoring higher on the Stimulation/Activation factor (control of weight, enjoyment, concentration, and "peps me up") at baseline were just less than half as likely to be abstinent at 15 weeks. Female participants were five times more likely to abstinent at 15 weeks, and those with a higher global functioning at baseline were 5% more likely to be abstinent. There was a positive correlation between changes over time in the Stimulation/Activation factor from baseline to 12-month follow-up and the Brief Psychiatric Rating Scale total score at 12-month follow-up. This indicates that increasingly higher endorsement of the factor was associated with more psychological symptoms. There was also a negative correlation between the change over time in the Stimulation/Activation factor and global functioning at 12 months, indicating that increasingly higher endorsement of the factor led to lower global assessment of functioning. CONCLUSIONS The Stimulation/Activation factor may be particularly important to assess and address among smokers with psychosis. It is recommended that further research use the Reasons for Smoking Questionnaire among smokers with psychosis as a clinical tool to identify specific quit barriers. Further research into why females have higher smoking cessation rates in the short term and relapse prevention interventions seem worthy of further investigation.
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Affiliation(s)
- Vanessa Clark
- a School of Medicine and Public Health , University of Newcastle , New South Wales , Australia
| | - Amanda Baker
- a School of Medicine and Public Health , University of Newcastle , New South Wales , Australia.,b NHMRC Centre for Research Excellence in Mental Health and Substance Use, National Drug and Alcohol Research Centre , University of Newcastle , New South Wales , Australia
| | - Terry Lewin
- c Priority Research Centre for Brain and Mental Health , University of Newcastle , New South Wales , Australia
| | - Robyn Richmond
- d School of Public Health and Community Medicine , University of New South Wales , Australia
| | - Frances Kay-Lambkin
- b NHMRC Centre for Research Excellence in Mental Health and Substance Use, National Drug and Alcohol Research Centre , University of Newcastle , New South Wales , Australia.,c Priority Research Centre for Brain and Mental Health , University of Newcastle , New South Wales , Australia
| | - Sacha Filia
- e Central Clinical School , Monash University , The Alfred Hospital, Victoria , Australia
| | - David Castle
- f St. Vincent's Hospital Melbourne , Victoria, Australia.,g The University of Melbourne , Victoria , Australia.,h Faculty of Health Sciences , Australian Catholic University , Victoria , Australia
| | - Jill Williams
- i Division of Addiction Psychiatry , Rutgers-Robert Wood Johnson Medical School , New Brunswick , New Jersey , USA
| | - Juanita Todd
- j School of Psychology , University of Newcastle , New South Wales , Australia
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Tomko JR, Ahmed N, Kuntz C, Zick J. A Reasonable Alternative to Clozapine in the Chronically Relapsing Smoking Patient? A Retrospective Analysis. Hosp Pharm 2016; 51:834-840. [PMID: 27928189 DOI: 10.1310/hpj5110-834] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Background: Clozapine levels are severely decreased by cigarette smoke hydrocarbons. A new agent that is unaffected by smoking is paliperidone palmitate. Objective: The purpose of this study is to retrospectively evaluate hospital readmission and time until readmission for patients prescribed paliperidone palmitate intramuscular injection (PP) as an alternative to oral clozapine for patients with severe schizophrenia who resume smoking following discharge. A secondary analysis was performed to determine whether smoking status alone affects hospital readmission rates in both smoking and nonsmoking clozapine-treated patients. Methods: This was a retrospective analysis of all patients who were positive for smoking at admission and readmission who were prescribed clozapine and PP. Smokers were identified by concurrent orders for nicotine replacement. Readmission rates and time until readmission were determined. Data were analyzed utilizing nonparametric statistical methods. Results: A total of 133 subjects were identified, including 108 smokers in PP group, 18 smokers in clozapine group, and 7 nonsmoking clozapine patients. Readmission rates were statistically significant between smokers in the clozapine and PP groups, with significantly lower readmission rates in the PP group (p = .004). In the sub-analysis, hospital readmissions between smokers and nonsmokers in the clozapine group were statistically significant (p = .027). Results may be influenced by use of a single hospital site, limits of a retrospective analysis, and variation in pharmaceutical preparation. Conclusion: PP may be a reasonable alternative to clozapine in severe schizophrenia for patients who continually resume smoking following discharge. Smoking may also be an important predictor of decompensation in smokers prescribed clozapine. A further prospective study is warranted.
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Daumit GL, McGinty EE, Pronovost P, Dixon LB, Guallar E, Ford DE, Cahoon EK, Boonyasai RT, Thompson D. Patient Safety Events and Harms During Medical and Surgical Hospitalizations for Persons With Serious Mental Illness. Psychiatr Serv 2016; 67:1068-1075. [PMID: 27181736 PMCID: PMC5048490 DOI: 10.1176/appi.ps.201500415] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE This study explored the risk of patient safety events and associated nonfatal physical harms and mortality in a cohort of persons with serious mental illness. This group experiences high rates of medical comorbidity and premature mortality and may be at high risk of adverse patient safety events. METHODS Medical record review was conducted for medical-surgical hospitalizations occurring during 1994-2004 in a community-based cohort of Maryland adults with serious mental illness. Individuals were eligible if they died within 30 days of a medical-surgical hospitalization and if they also had at least one prior medical-surgical hospitalization within five years of death. All admissions took place at Maryland general hospitals. A case-crossover analysis examined the relationships among patient safety events, physical harms, and elevated likelihood of death within 30 days of hospitalization. RESULTS A total of 790 hospitalizations among 253 adults were reviewed. The mean number of patient safety events per hospitalization was 5.8, and the rate of physical harms was 142 per 100 hospitalizations. The odds of physical harm were elevated in hospitalizations in which 22 of the 34 patient safety events occurred (p<.05), including medical events (odds ratio [OR]=1.5, 95% confidence interval [CI]=1.3-1.7) and procedure-related events (OR=1.6, CI=1.2-2.0). Adjusted odds of death within 30 days of hospitalization were elevated for individuals with any patient safety event, compared with those with no event (OR=3.7, CI=1.4-10.3). CONCLUSIONS Patient safety events were positively associated with physical harm and 30-day mortality in nonpsychiatric hospitalizations for persons with serious mental illness.
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Affiliation(s)
- Gail L Daumit
- Dr. Daumit, Dr. Ford, and Dr. Boonyasai are with the Department of Internal Medicine, and Dr. Pronovost and Dr. Thompson are with the Department of Anesthesiology and the Department of Critical Care Medicine, all at Johns Hopkins University School of Medicine, Baltimore. Dr. Daumit is also with the Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, where Dr. McGinty is affiliated. Dr. Dixon is with the New York State Psychiatric Institute and the Department of Psychiatry, Columbia University College of Physicians and Surgeons, New York City. Dr. Guallar is with the Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore. Dr. Cahoon is with the Radiation Epidemiology Branch, National Cancer Institute, Bethesda, Maryland. Send correspondence to Dr. McGinty (e-mail: )
| | - Emma E McGinty
- Dr. Daumit, Dr. Ford, and Dr. Boonyasai are with the Department of Internal Medicine, and Dr. Pronovost and Dr. Thompson are with the Department of Anesthesiology and the Department of Critical Care Medicine, all at Johns Hopkins University School of Medicine, Baltimore. Dr. Daumit is also with the Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, where Dr. McGinty is affiliated. Dr. Dixon is with the New York State Psychiatric Institute and the Department of Psychiatry, Columbia University College of Physicians and Surgeons, New York City. Dr. Guallar is with the Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore. Dr. Cahoon is with the Radiation Epidemiology Branch, National Cancer Institute, Bethesda, Maryland. Send correspondence to Dr. McGinty (e-mail: )
| | - Peter Pronovost
- Dr. Daumit, Dr. Ford, and Dr. Boonyasai are with the Department of Internal Medicine, and Dr. Pronovost and Dr. Thompson are with the Department of Anesthesiology and the Department of Critical Care Medicine, all at Johns Hopkins University School of Medicine, Baltimore. Dr. Daumit is also with the Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, where Dr. McGinty is affiliated. Dr. Dixon is with the New York State Psychiatric Institute and the Department of Psychiatry, Columbia University College of Physicians and Surgeons, New York City. Dr. Guallar is with the Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore. Dr. Cahoon is with the Radiation Epidemiology Branch, National Cancer Institute, Bethesda, Maryland. Send correspondence to Dr. McGinty (e-mail: )
| | - Lisa B Dixon
- Dr. Daumit, Dr. Ford, and Dr. Boonyasai are with the Department of Internal Medicine, and Dr. Pronovost and Dr. Thompson are with the Department of Anesthesiology and the Department of Critical Care Medicine, all at Johns Hopkins University School of Medicine, Baltimore. Dr. Daumit is also with the Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, where Dr. McGinty is affiliated. Dr. Dixon is with the New York State Psychiatric Institute and the Department of Psychiatry, Columbia University College of Physicians and Surgeons, New York City. Dr. Guallar is with the Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore. Dr. Cahoon is with the Radiation Epidemiology Branch, National Cancer Institute, Bethesda, Maryland. Send correspondence to Dr. McGinty (e-mail: )
| | - Eliseo Guallar
- Dr. Daumit, Dr. Ford, and Dr. Boonyasai are with the Department of Internal Medicine, and Dr. Pronovost and Dr. Thompson are with the Department of Anesthesiology and the Department of Critical Care Medicine, all at Johns Hopkins University School of Medicine, Baltimore. Dr. Daumit is also with the Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, where Dr. McGinty is affiliated. Dr. Dixon is with the New York State Psychiatric Institute and the Department of Psychiatry, Columbia University College of Physicians and Surgeons, New York City. Dr. Guallar is with the Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore. Dr. Cahoon is with the Radiation Epidemiology Branch, National Cancer Institute, Bethesda, Maryland. Send correspondence to Dr. McGinty (e-mail: )
| | - Daniel E Ford
- Dr. Daumit, Dr. Ford, and Dr. Boonyasai are with the Department of Internal Medicine, and Dr. Pronovost and Dr. Thompson are with the Department of Anesthesiology and the Department of Critical Care Medicine, all at Johns Hopkins University School of Medicine, Baltimore. Dr. Daumit is also with the Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, where Dr. McGinty is affiliated. Dr. Dixon is with the New York State Psychiatric Institute and the Department of Psychiatry, Columbia University College of Physicians and Surgeons, New York City. Dr. Guallar is with the Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore. Dr. Cahoon is with the Radiation Epidemiology Branch, National Cancer Institute, Bethesda, Maryland. Send correspondence to Dr. McGinty (e-mail: )
| | - Elizabeth K Cahoon
- Dr. Daumit, Dr. Ford, and Dr. Boonyasai are with the Department of Internal Medicine, and Dr. Pronovost and Dr. Thompson are with the Department of Anesthesiology and the Department of Critical Care Medicine, all at Johns Hopkins University School of Medicine, Baltimore. Dr. Daumit is also with the Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, where Dr. McGinty is affiliated. Dr. Dixon is with the New York State Psychiatric Institute and the Department of Psychiatry, Columbia University College of Physicians and Surgeons, New York City. Dr. Guallar is with the Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore. Dr. Cahoon is with the Radiation Epidemiology Branch, National Cancer Institute, Bethesda, Maryland. Send correspondence to Dr. McGinty (e-mail: )
| | - Romsai T Boonyasai
- Dr. Daumit, Dr. Ford, and Dr. Boonyasai are with the Department of Internal Medicine, and Dr. Pronovost and Dr. Thompson are with the Department of Anesthesiology and the Department of Critical Care Medicine, all at Johns Hopkins University School of Medicine, Baltimore. Dr. Daumit is also with the Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, where Dr. McGinty is affiliated. Dr. Dixon is with the New York State Psychiatric Institute and the Department of Psychiatry, Columbia University College of Physicians and Surgeons, New York City. Dr. Guallar is with the Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore. Dr. Cahoon is with the Radiation Epidemiology Branch, National Cancer Institute, Bethesda, Maryland. Send correspondence to Dr. McGinty (e-mail: )
| | - David Thompson
- Dr. Daumit, Dr. Ford, and Dr. Boonyasai are with the Department of Internal Medicine, and Dr. Pronovost and Dr. Thompson are with the Department of Anesthesiology and the Department of Critical Care Medicine, all at Johns Hopkins University School of Medicine, Baltimore. Dr. Daumit is also with the Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, where Dr. McGinty is affiliated. Dr. Dixon is with the New York State Psychiatric Institute and the Department of Psychiatry, Columbia University College of Physicians and Surgeons, New York City. Dr. Guallar is with the Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore. Dr. Cahoon is with the Radiation Epidemiology Branch, National Cancer Institute, Bethesda, Maryland. Send correspondence to Dr. McGinty (e-mail: )
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Sankaranarayanan A, Clark V, Baker A, Palazzi K, Lewin TJ, Richmond R, Kay-Lambkin FJ, Filia S, Castle D, Williams JM. Reducing smoking reduces suicidality among individuals with psychosis: Complementary outcomes from a Healthy Lifestyles intervention study. Psychiatry Res 2016; 243:407-12. [PMID: 27450743 DOI: 10.1016/j.psychres.2016.07.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Revised: 06/02/2016] [Accepted: 07/04/2016] [Indexed: 10/21/2022]
Abstract
This study sought to explore the impact of smoking reduction on suicidality (suicide ideation and behaviour) among people with a psychotic disorder (n=235) who participated in a randomized trial of a healthy lifestyle intervention trial. Suicidality, measured by item -4 of the Brief Psychiatric Rating Scale (BPRS) was the main variable of interest. Measures were collected by research assistants blind to treatment allocation at baseline, at 15 weeks (mid-intervention) and 12 months after baseline. Mediation analysis, adjusted for confounders, was used to determine the relationship between smoking reduction and suicidality and to explore whether this was mediated through depression. At 12 months, smoking reduction was found to be significantly associated with suicidality change; an association was also seen between smoking reduction and depression and depression and suicidality. After adjusting for depression, the association between smoking reduction and suicidality was attenuated but remained statistically significant; the proportion of the total effect that was mediated through depression was 30%. There was no significant association between suicidality and treatment group (vs. controls) over time. Our study suggests that smoking interventions may have benefits over and above those for improved physical health, by reducing suicidal ideation in people with psychosis.
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Affiliation(s)
- Anoop Sankaranarayanan
- Hunter New England Mental Health Service, Australia; School of Medicine and Public Health, University of Newcastle, Callaghan, NSW, Australia.
| | - Vanessa Clark
- School of Medicine and Public Health, University of Newcastle, Callaghan, NSW, Australia
| | - Amanda Baker
- School of Medicine and Public Health, University of Newcastle, Callaghan, NSW, Australia
| | - Kerrin Palazzi
- Public Health Program, Hunter Medical Research Institute (HMRI), Newcastle, NSW, Australia
| | - Terry J Lewin
- Hunter New England Mental Health Service, Australia; School of Medicine and Public Health, University of Newcastle, Callaghan, NSW, Australia; Centre for Translational Neuroscience and Mental Health, University of Newcastle, Australia
| | - Robyn Richmond
- School of Public Health and Community Medicine, University of New South Wales, Sydney, Australia
| | - Frances J Kay-Lambkin
- Centre for Translational Neuroscience and Mental Health, University of Newcastle, Australia; NHMRC Centre for Research Excellence in Mental Health and Substance Use, National Drug and Alcohol Research Centre, University of New South Wales, Australia
| | - Sacha Filia
- Monash Alfred Psychiatry Research Centre, Central Clinical School, Monash University, Victoria, Australia; Alfred Hospital, 55 Commercial Road, Prahran, Melbourne, Victoria, Australia
| | - David Castle
- St. Vincent's Hospital, PO Box 2900, Fitzroy, Victoria, Australia; The University of Melbourne, Parkville, Melbourne, Victoria, Australia; Faculty of Health Sciences, Australian Catholic University, 1100 Nudgee Road, Banyo, Queensland, Australia
| | - Jill M Williams
- Division of Addiction Psychiatry, Rutgers-Robert Wood Johnson Medical School, New Brunswick, NJ, USA
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Xin L, Mekle R, Fournier M, Baumann PS, Ferrari C, Alameda L, Jenni R, Lu H, Schaller B, Cuenod M, Conus P, Gruetter R, Do KQ. Genetic Polymorphism Associated Prefrontal Glutathione and Its Coupling With Brain Glutamate and Peripheral Redox Status in Early Psychosis. Schizophr Bull 2016; 42:1185-96. [PMID: 27069063 PMCID: PMC4988744 DOI: 10.1093/schbul/sbw038] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
BACKGROUND Oxidative stress and glutathione (GSH) metabolism dysregulation has been implicated in the pathophysiology of schizophrenia. GAG-trinucleotide repeat (TNR) polymorphisms in the glutamate-cysteine ligase catalytic gene (GCLC), the rate-limiting enzyme for GSH synthesis, are associated with schizophrenia. In addition, GSH may serve as a reserve pool for neuronal glutamate (Glu) through the γ-glutamyl cycle. The aim of this study is to investigate brain [GSH] and its association with GCLC polymorphism, peripheral redox indices and brain Glu. METHODS Magnetic resonance spectroscopy was used to measure [GSH] and [Glu] in the medial prefrontal cortex (mPFC) of 25 early-psychosis patients and 33 controls. GCLC polymorphism was genotyped, glutathione peroxidases (GPx) and glutathione reductase (GR) activities were determined in blood cells. RESULTS Significantly lower [GSHmPFC] in GCLC high-risk genotype subjects were revealed as compared to low-risk genotype subjects independent of disease status. In male subjects, [GSHmPFC] and blood GPx activities correlate positively in controls (P = .021), but negatively in patients (P = .039). In GCLC low-risk genotypes, [GlumPFC] are lower in patients, while it is not the case for high-risk genotypes. CONCLUSIONS GCLC high-risk genotypes are associated with low [GSHmPFC], highlighting that GCLC polymorphisms should be considered in pathology studies of cerebral GSH. Low brain GSH levels are related to low peripheral oxidation status in controls but with high oxidation status in patients, pointing to a dysregulated GSH homeostasis in early psychosis patients. GCLC polymorphisms and disease associated correlations between brain GSH and Glu levels may allow patients stratification.
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Affiliation(s)
- Lijing Xin
- Animal Imaging and Technology Core (AIT), Center for Biomedical Imaging (CIBM), Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Ralf Mekle
- Physikalisch-Technische Bundesanstalt, Berlin, Germany
| | - Margot Fournier
- Unit for Research in Schizophrenia, Center for Psychiatric Neuroscience, Department of Psychiatry, Lausanne University Hospital (CHUV), Lausanne, Switzerland
| | - Philipp S. Baumann
- Unit for Research in Schizophrenia, Center for Psychiatric Neuroscience, Department of Psychiatry, Lausanne University Hospital (CHUV), Lausanne, Switzerland;,Service of General Psychiatry, Department of Psychiatry, Lausanne University Hospital (CHUV), Lausanne, Switzerland
| | - Carina Ferrari
- Unit for Research in Schizophrenia, Center for Psychiatric Neuroscience, Department of Psychiatry, Lausanne University Hospital (CHUV), Lausanne, Switzerland;,Service of General Psychiatry, Department of Psychiatry, Lausanne University Hospital (CHUV), Lausanne, Switzerland
| | - Luis Alameda
- Unit for Research in Schizophrenia, Center for Psychiatric Neuroscience, Department of Psychiatry, Lausanne University Hospital (CHUV), Lausanne, Switzerland;,Service of General Psychiatry, Department of Psychiatry, Lausanne University Hospital (CHUV), Lausanne, Switzerland
| | - Raoul Jenni
- Unit for Research in Schizophrenia, Center for Psychiatric Neuroscience, Department of Psychiatry, Lausanne University Hospital (CHUV), Lausanne, Switzerland;,Service of General Psychiatry, Department of Psychiatry, Lausanne University Hospital (CHUV), Lausanne, Switzerland
| | - Huanxiang Lu
- Institute of Surgical Technology and Biomechanics, University of Bern, Bern, Switzerland
| | - Benoit Schaller
- Laboratory of Functional and Metabolic Imaging, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Michel Cuenod
- Unit for Research in Schizophrenia, Center for Psychiatric Neuroscience, Department of Psychiatry, Lausanne University Hospital (CHUV), Lausanne, Switzerland
| | - Philippe Conus
- Service of General Psychiatry, Department of Psychiatry, Lausanne University Hospital (CHUV), Lausanne, Switzerland
| | | | - Kim Q. Do
- Unit for Research in Schizophrenia, Center for Psychiatric Neuroscience, Department of Psychiatry, Lausanne University Hospital (CHUV), Lausanne, Switzerland;,*To whom correspondence should be addressed; Center for Psychiatric Neuroscience, Department of Psychiatry, Lausanne University Hospital, Site de Cery, CH-1008 Prilly-Lausanne, Switzerland; tel: +41-(0)21-314-28-42, fax: +41-(0)21-643-65-62, e-mail:
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Abstract
This article presents findings from a study that evaluated the utility of Protection Motivation Theory to explain cardiovascular health behaviors among people with schizophrenia ( n = 83) and depression ( n = 70). Results indicated that the prevalence of overweight, cigarette smoking and a sedentary lifestyle were greater among people with a mental illness compared to individuals without a mental illness. Major predictors were high levels of fear of cardiovascular disease, lack of knowledge of correct dietary principles, lower self-efficacy, limited social support and psychiatric symptoms. Implications of these results are discussed in designing education and preventive health programs for individuals with schizophrenia and Mental Depressive Disorder (MDD).
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Affiliation(s)
- Loranie Leas
- School of Psychology, Deakin University, Burwood, Victoria, Australia
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Gleeson PC, Worsley R, Gavrilidis E, Nathoo S, Ng E, Lee S, Kulkarni J. Menstrual cycle characteristics in women with persistent schizophrenia. Aust N Z J Psychiatry 2016; 50:481-7. [PMID: 26070315 DOI: 10.1177/0004867415590459] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
OBJECTIVE Oestradiol has been implicated in the pathogenesis of schizophrenia. Women with schizophrenia often suffer with menstrual dysfunction, usually associated with low oestradiol levels, but whether menstrual dysfunction has an effect on their psychiatric symptoms is not well researched. The aim of this study is to document the menstrual characteristics of women with chronic schizophrenia with focus upon menstrual regularity, menstrual cycle length and menstrual symptoms. To determine which patient characteristics are associated with irregular menses and whether irregular menses are associated with the severity of psychotic symptoms, menstrual symptoms or depressive symptoms. METHOD Cross-sectional analyses using baseline data of women enrolled in a clinical trial. Inclusion criteria include Diagnostic and Statistical Manual of Mental Disorders-Fourth Edition, Text Revision diagnosis of schizophrenia, schizoaffective or schizophreniform disorder; aged between 18 and 51 years; residual symptoms of psychosis despite treatment with a stable dose of antipsychotic medication for at least 4 weeks. Menstrual cycle characteristics including regularity, cycle length and menstrual associated symptoms were documented. Symptoms of schizophrenia were measured using Positive and Negative Syndrome Scale, cognition was measured using Repeatable Battery for the Assessment of Neuropsychological Status and depression was assessed using the Montgomery-Asberg Depression Rating Scale. Blood samples were collected at baseline for hormone assays. RESULTS Of the 139 women, 77 (55.4%) had regular menses, 57 (41%) had irregular menses and 5 (3.6%) women had missing data on their menstrual cycle. Use of atypical antipsychotics associated with hyperprolactinaemia was positively associated with irregular menses (odds ratio = 4.4, 95% confidence interval = [1.8, 10.9], p = 0.001), while age more than 30 years was negatively associated (odds ratio = 0.3, 95% confidence interval = [0.1, 0.6], p = 0.004). Women with irregular cycles had significantly lower oestradiol levels than women with regular cycles (213.2 ± 25.0 vs 299.0 ± 27.3, p = 0.03), but there was no difference in Positive and Negative Syndrome Scale, Montgomery-Asberg Depression Rating Scale or Repeatable Battery for the Assessment of Neuropsychological Status between those with regular and irregular cycles. The most common menstrual associated symptoms were decrease in mood with the menstrual cycle (64.8%), bloating (64.8%), cramps (59.7%), back pain (37.6%) and worsening of psychosis symptoms (32.4%). CONCLUSION Regular menses are associated with higher oestradiol levels and higher rates of cyclical mood symptoms but are not associated with Positive and Negative Syndrome Scale scores. Understanding the effect the menstrual cycle can have on psychiatric illness, such as premenstrual exacerbations, is important for the holistic care of women with schizophrenia.
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Affiliation(s)
- Pia C Gleeson
- School of Medicine, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Roisin Worsley
- Alfred Hospital Psychiatry Department and Monash University Central Clinical School, Monash Alfred Psychiatry Research Centre (MAPrc), Melbourne, VIC, Australia
| | - Emorfia Gavrilidis
- Alfred Hospital Psychiatry Department and Monash University Central Clinical School, Monash Alfred Psychiatry Research Centre (MAPrc), Melbourne, VIC, Australia
| | - Shainal Nathoo
- Alfred Hospital Psychiatry Department and Monash University Central Clinical School, Monash Alfred Psychiatry Research Centre (MAPrc), Melbourne, VIC, Australia
| | - Elisabeth Ng
- Alfred Hospital Psychiatry Department and Monash University Central Clinical School, Monash Alfred Psychiatry Research Centre (MAPrc), Melbourne, VIC, Australia
| | - Stuart Lee
- Alfred Hospital Psychiatry Department and Monash University Central Clinical School, Monash Alfred Psychiatry Research Centre (MAPrc), Melbourne, VIC, Australia
| | - Jayashri Kulkarni
- Alfred Hospital Psychiatry Department and Monash University Central Clinical School, Monash Alfred Psychiatry Research Centre (MAPrc), Melbourne, VIC, Australia
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Li Y, Cao XL, Zhong BL, Ungvari GS, Chiu HFK, Lai KYC, Zheng W, Correll CU, Xiang YT. Smoking in male patients with schizophrenia in China: A meta-analysis. Drug Alcohol Depend 2016; 162:146-53. [PMID: 26996743 DOI: 10.1016/j.drugalcdep.2016.02.040] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Revised: 02/15/2016] [Accepted: 02/28/2016] [Indexed: 11/30/2022]
Abstract
BACKGROUND The aim of this study was to examine the prevalence of current smoking in male patients with schizophrenia in China. METHOD A systematic literature search was conducted from database inception until June 20, 2015 without language restrictions in PubMed, EMBASE, China National Knowledge Infrastructure (CNKI) and WanFang Database. Studies fulfilling the following criteria were included: (a) data available in male schizophrenia patients and (b) data available on current smoking status. Statistical analyses were performed with the Comprehensive Meta-Analysis program. RESULTS A total of 23 studies met eligibility criteria for the meta-analysis. The pooled prevalence of current smoking was 59.1% (95% Confidence interval [CI]: 53.3-64.7%). Current smoking was significantly more frequent in inpatients than in outpatients (61.3% vs. 48.2%, Q=7.5, P=0.006), and higher in chronic compared to first-episode patients (74.5% vs. 45.1%, Q=32.3, P=0.0001). Furthermore, using a median split, patients aged 38.2 years or older smoked more often than those aged below 38.2 years (65.8% vs. 52.3%, Q=6.4, P=0.01). There were no significant associations between prevalence of current smoking and definitions of smoking, study publication year, sample size and illness duration. CONCLUSIONS The pooled prevalence of current smoking of male patients with schizophrenia in China is lower compared to Western and other Asian countries. Possible relationships between lower prevalence of current smoking and psychopathology in patients with schizophrenia require further investigation.
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Affiliation(s)
- Yan Li
- National Clinical Research Center for Mental Disorders & Mood Disorders Centre, Beijing Anding Hospital, Capital Medical University, Beijing, China; Department of Psychiatry, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Xiao-Lan Cao
- Shenzhen Key Laboratory for Psychological Healthcare & Shenzhen Institute of Mental Health, Shenzhen Kangning Hospital & Shenzhen Mental Health Center, Shenzhen, China
| | - Bao-Liang Zhong
- Department of Psychiatry, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Gabor S Ungvari
- The University of Notre Dame Australia/Marian Centre, Perth, Australia; School of Psychiatry & Clinical Neurosciences, University of Western Australia, Perth, Australia
| | - Helen F K Chiu
- Department of Psychiatry, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Kelly Y C Lai
- Department of Psychiatry, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Wei Zheng
- Department of General Psychiatry, Guangzhou Huiai Hospital & the Affiliated Brain Hospital of Guangzhou Medical University, Guangdong province, China
| | - Christoph U Correll
- Division of Psychiatry Research, The Zucker Hillside Hospital, North Shore-Long Island Jewish Health System, Glen Oaks, NY, USA
| | - Yu-Tao Xiang
- Unit of Psychiatry, Faculty of Health Sciences, University of Macau, Macao SAR, China.
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Parikh V, Kutlu MG, Gould TJ. nAChR dysfunction as a common substrate for schizophrenia and comorbid nicotine addiction: Current trends and perspectives. Schizophr Res 2016; 171:1-15. [PMID: 26803692 PMCID: PMC4762752 DOI: 10.1016/j.schres.2016.01.020] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Revised: 01/07/2016] [Accepted: 01/10/2016] [Indexed: 11/18/2022]
Abstract
INTRODUCTION The prevalence of tobacco use in the population with schizophrenia is enormously high. Moreover, nicotine dependence is found to be associated with symptom severity and poor outcome in patients with schizophrenia. The neurobiological mechanisms that explain schizophrenia-nicotine dependence comorbidity are not known. This study systematically reviews the evidence highlighting the contribution of nicotinic acetylcholine receptors (nAChRs) to nicotine abuse in schizophrenia. METHODS Electronic data bases (Medline, Google Scholar, and Web of Science) were searched using the selected key words that match the aims set forth for this review. A total of 276 articles were used for the qualitative synthesis of this review. RESULTS Substantial evidence from preclinical and clinical studies indicated that dysregulation of α7 and β2-subunit containing nAChRs account for the cognitive and affective symptoms of schizophrenia and nicotine use may represent a strategy to remediate these symptoms. Additionally, recent meta-analyses proposed that early tobacco use may itself increase the risk of developing schizophrenia. Genetic studies demonstrating that nAChR dysfunction that may act as a shared vulnerability factor for comorbid tobacco dependence and schizophrenia were found to support this view. The development of nAChR modulators was considered an effective therapeutic strategy to ameliorate psychiatric symptoms and to promote smoking cessation in schizophrenia patients. CONCLUSIONS The relationship between schizophrenia and smoking is complex. While the debate for the self-medication versus addiction vulnerability hypothesis continues, it is widely accepted that a dysfunction in the central nAChRs represent a common substrate for various symptoms of schizophrenia and comorbid nicotine dependence.
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Affiliation(s)
- Vinay Parikh
- Department of Psychology and Neuroscience Program, Temple University, Philadelphia, PA 19112, United States.
| | - Munir Gunes Kutlu
- Department of Psychology and Neuroscience Program, Temple University, Philadelphia, PA 19112, United States
| | - Thomas J Gould
- Department of Psychology and Neuroscience Program, Temple University, Philadelphia, PA 19112, United States
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TEKİN ULUDAĞ Y, GÜLEÇ G. Prevalence of Substance Use in Patients Diagnosed with Schizophrenia. Noro Psikiyatr Ars 2016; 53:4-11. [PMID: 28360758 PMCID: PMC5353236 DOI: 10.5152/npa.2015.8827] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Accepted: 09/23/2014] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION Substance abuse among schizophrenic patients is a growing clinical concern. Substance use disorders and their effects on the course of schizophrenia have made the identification and treatment of schizophrenic patients a high priority. This study aimed to investigate the prevalence of substance use, preferred types of substances, sociodemographic characteristics and clinical features of schizophrenia, and substance use impact in schizophrenic patients. METHODS Hundred patients who were consecutively admitted to the psychiatry clinic and were diagnosed with schizophrenia according to the DSM-IV criteria were enrolled in this study. Individual interviews were conducted during the patients. In order to evaluate substance abuse disorder (SAD) as per DSM-IV criteria, the substance use disorder section of the structured clinical interview for DSM disorders-II (SCID-II) form was used. In addition, the following were applied to schizophren-ic patients: sociodemographic data form, medical history form, Brief Disability Questionnaire (BDQ), UKU Side Effect Rating Scale (UKUSERS), Insight Rating Scale (IRS), Alcohol Use Dis-orders Identification Test (AUDIT), Fagerstrom Nicotine Dependence Test (FNDT), Global As-sessment of Functioning Scale (GAF), Scale for the Assessment of Positive Symptoms (SAPS), Scale for the Assessment of Negative Symptoms (SANS), and Calgary Depression Scale (CDS). RESULTS Schizophrenia and alcohol and drug use were more common in males, and younger age was found to have no association with substance use. Unemployment, low education levels, rural survival rates, age at disease onset, the doctor first age of the applicant, the first inpatient years, legal issues, harm caused by others and suicidal behavior, SAPS, SANS, CDS received from their scores significant difference was detected. Schizophrenic patients with substance use had higher side effects of drugs, disability, and psychopathology scores than schizophrenic patients without substance use. The functioning of schizophrenic patients with substance use was worse, and the total length of stay was longer. Nicotine, alcohol, biperiden, cannabis, and volatile substances were the preferred materials most commonly used by schizophrenic patients. CONCLUSION In our country, limited research has been conducted on the prevalence of substance use in schizophrenic patients. Therefore, we believe that this study will contribute to the literature on the subject. More sample groups and first-episode patients as well as follow-up studies will contribute to a better understanding of the effect of substance use on the clinical course of schizophrenia.
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Affiliation(s)
| | - Gülcan GÜLEÇ
- Department of Psychiatry, Eskişehir Osmangazi University School of Medicine, Eskişehir, Turkey
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Deng H, Wang J, Zhang X, Ma M, Domingo C, Sun H, Kosten T. Smoking reduction and quality of life in chronic patients with schizophrenia in a Chinese population--A pilot study. Am J Addict 2016; 25:86-90. [PMID: 26824336 DOI: 10.1111/ajad.12337] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2015] [Revised: 01/07/2016] [Accepted: 01/18/2016] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Tobacco use is a significant public health issue on a global scale. Prevalence of daily tobacco smoking for men in China is much higher than in the United States. Although prevailing literature suggests a negative relationship between smoking and quality of life, this pilot study sought to evaluate whether smoking reduction/cessation impacted on the perception of quality of life in an in-patient population in China. METHODS Twenty Chinese patients meeting DSM-IV criteria for schizophrenia were recruited from Beijing Hui-Long-Guan Hospital, an in-patient facility in Beijing, China, for participation in this 4-week study. Seventeen participants with schizophrenia completed the study and were included in the final analysis. Cigarette consumption was recorded daily and the World Health Organization Quality of Life-BREF (WHOQOL-BREF) was completed at baseline and at week 4. The relationships between smoking and perceived quality of life were evaluated using correlations between changes in WHOQOL-BREF and changes in cigarettes consumed as measured from baseline to week 4. RESULTS We found an increase in perceived quality of life in the social relationships domain with increased cigarette consumption in contrast to a decrease in this domain with decreased consumption. However, decreased cigarette consumption was associated with an increase in the psychological domain compared to the social domain. CONCLUSIONS AND SCIENTIFIC SIGNIFICANCE These associations suggest a need for interventions to improve the social relationship perceptions with any successful reduction in cigarette consumption among Chinese schizophrenics in order to match their perceived psychological improvement.
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Affiliation(s)
- Huiqiong Deng
- Department of Psychiatry and Behavioral Sciences, University of Texas Medical School at Houston, Houston, Texas
| | - Jia Wang
- Baylor College of Medicine, Houston, Texas
| | - Xiangyang Zhang
- Department of Psychiatry and Behavioral Sciences, University of Texas Medical School at Houston, Houston, Texas
| | - Mengying Ma
- Beijing Hui-Long-Guan Hospital, Peking University, Beijing, China
| | - Coreen Domingo
- Baylor College of Medicine, Houston, Texas.,Michael E. DeBakey VA Medical Center, Houston, Texas
| | - Hongqiang Sun
- Peking University Sixth Hospital/Institute of Mental Health and National Clinical Research Center for Mental Disorders, Beijing, China.,Key Laboratory of Mental Health, Ministry of Health, Peking University, Beijing, China
| | - Thomas Kosten
- Baylor College of Medicine, Houston, Texas.,Michael E. DeBakey VA Medical Center, Houston, Texas
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DeAngeli NE, Todd TP, Chang SE, Yeh HH, Yeh PW, Bucci DJ. Exposure to Kynurenic Acid during Adolescence Increases Sign-Tracking and Impairs Long-Term Potentiation in Adulthood. Front Behav Neurosci 2015; 8:451. [PMID: 25610382 PMCID: PMC4285091 DOI: 10.3389/fnbeh.2014.00451] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Accepted: 12/16/2014] [Indexed: 11/21/2022] Open
Abstract
Changes in brain reward systems are thought to contribute significantly to the cognitive and behavioral impairments of schizophrenia, as well as the propensity to develop co-occurring substance abuse disorders. Presently, there are few treatments for persons with a dual diagnosis and little is known about the neural substrates that underlie co-occurring schizophrenia and substance abuse. One goal of the present study was to determine if a change in the concentration of kynurenic acid (KYNA), a tryptophan metabolite that is increased in the brains of people with schizophrenia, affects reward-related behavior. KYNA is an endogenous antagonist of NMDA glutamate receptors and α7 nicotinic acetylcholine receptors, both of which are critically involved in neurodevelopment, plasticity, and behavior. In Experiment 1, rats were treated throughout adolescence with L-kynurenine (L-KYN), the precursor of KYNA. As adults, the rats were tested drug-free in an autoshaping procedure in which a lever was paired with food. Rats treated with L-KYN during adolescence exhibited increased sign-tracking behavior (lever pressing) when they were tested as adults. Sign-tracking is thought to reflect the lever acquiring incentive salience (motivational value) as a result of its pairing with reward. Thus, KYNA exposure may increase the incentive salience of cues associated with reward, perhaps contributing to an increase in sensitivity to drug-related cues in persons with schizophrenia. In Experiment 2, we tested the effects of exposure to KYNA during adolescence on hippocampal long-term potentiation (LTP). Rats treated with L-KYN exhibited no LTP after a burst of high-frequency stimulation that was sufficient to produce robust LTP in vehicle-treated rats. This finding represents the first demonstrated consequence of elevated KYNA concentration during development and provides insight into the basis for cognitive and behavioral deficits that result from exposure to KYNA during adolescence.
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Affiliation(s)
- Nicole E DeAngeli
- Department of Psychological and Brain Sciences, Dartmouth College , Hanover, NH , USA
| | - Travis P Todd
- Department of Psychological and Brain Sciences, Dartmouth College , Hanover, NH , USA
| | - Stephen E Chang
- Department of Psychological and Brain Sciences, Dartmouth College , Hanover, NH , USA
| | - Hermes H Yeh
- Department of Physiology and Neurobiology, Geisel School of Medicine, Dartmouth College , Hanover, NH , USA
| | - Pamela W Yeh
- Department of Physiology and Neurobiology, Geisel School of Medicine, Dartmouth College , Hanover, NH , USA
| | - David J Bucci
- Department of Psychological and Brain Sciences, Dartmouth College , Hanover, NH , USA
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Ramanathan DS, Conner JM, Anilkumar AA, Tuszynski MH. Cholinergic systems are essential for late-stage maturation and refinement of motor cortical circuits. J Neurophysiol 2014; 113:1585-97. [PMID: 25505106 DOI: 10.1152/jn.00408.2014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Previous studies reported that early postnatal cholinergic lesions severely perturb early cortical development, impairing neuronal cortical migration and the formation of cortical dendrites and synapses. These severe effects of early postnatal cholinergic lesions preclude our ability to understand the contribution of cholinergic systems to the later-stage maturation of topographic cortical representations. To study cholinergic mechanisms contributing to the later maturation of motor cortical circuits, we first characterized the temporal course of cortical motor map development and maturation in rats. In this study, we focused our attention on the maturation of cortical motor representations after postnatal day 25 (PND 25), a time after neuronal migration has been accomplished and cortical volume has reached adult size. We found significant maturation of cortical motor representations after this time, including both an expansion of forelimb representations in motor cortex and a shift from proximal to distal forelimb representations to an extent unexplainable by simple volume enlargement of the neocortex. Specific cholinergic lesions placed at PND 24 impaired enlargement of distal forelimb representations in particular and markedly reduced the ability to learn skilled motor tasks as adults. These results identify a novel and essential role for cholinergic systems in the late refinement and maturation of cortical circuits. Dysfunctions in this system may constitute a mechanism of late-onset neurodevelopmental disorders such as Rett syndrome and schizophrenia.
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Affiliation(s)
- Dhakshin S Ramanathan
- Department of Neurosciences, University of California, San Diego, La Jolla, California; Department of Psychiatry, University of California, San Francisco, California; and Veterans Affairs Medical Center, San Francisco, California
| | - James M Conner
- Department of Neurosciences, University of California, San Diego, La Jolla, California
| | - Arjun A Anilkumar
- Department of Neurosciences, University of California, San Diego, La Jolla, California
| | - Mark H Tuszynski
- Department of Neurosciences, University of California, San Diego, La Jolla, California; Veterans Affairs Medical Center, San Diego, California;
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Wijesundera H, Hanwella R, de Silva VA. Antipsychotic medication and tobacco use among outpatients with schizophrenia: a cross-sectional study. Ann Gen Psychiatry 2014; 13:7. [PMID: 24642279 PMCID: PMC3995423 DOI: 10.1186/1744-859x-13-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2013] [Accepted: 03/06/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Many studies have shown that the prevalence of smoking in schizophrenia is higher than in the general population. Biological, psychological and social factors influence smoking in patients with schizophrenia. METHODS The study was carried out in psychiatry outpatient clinics in a tertiary care hospital in Sri Lanka. Every third patient was selected using systematic sampling from patients diagnosed with schizophrenia according to ICD-10 clinical criteria. Smoking behaviours were assessed using self-reports. Severity of illness was assessed using Brief Psychiatric Rating Scale (BPRS). Fagerstrom Test for Nicotine Dependence assessed level of dependence. Readiness to Change Questionnaire assessed motivation to change smoking behaviour. RESULTS The sample consisted of 306 patients with schizophrenia. Mean age was 38.93 years (SD 10.98). There were 148 males (48.4%). Mean duration of illness was 12.63 years (SD 8.38). Current medication was oral atypical antipsychotics 103, clozapine 136, oral typicals 29 and depot typicals 38. Prevalence of tobacco use among males was 30.41% (95% CI 22.91 to 37.90) and among females 1.90% (95% CI -0.25 to 4.05). Prevalence of current smoking among males was 20.27% (95% CI 13.72 to 26.82). None of the females smoked. Prevalence of smokeless tobacco use among males was 10.14 (95% CI 5.22 to 15.05) and among females 1.90 (95% CI -0.03 to 4.05). When patients treated with clozapine were excluded from the analysis, prevalence of tobacco use was 41.6% among males and 3.2% among females and prevalence of smoking was 29.9% among males. Prevalence of tobacco use was lowest in patients treated with clozapine 18.31 (95% CI 9.09 to 27.53) and highest in those treated with depot antipsychotics 47.83 (95% CI 25.74 to 69.91). CONCLUSIONS Prevalence of smoking was less than in many countries. This is influenced by prevalence in the general population and low affordability. Risk of tobacco use was significantly less among patients treated with clozapine.
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Affiliation(s)
- Hiranya Wijesundera
- University Psychiatry Unit, National Hospital of Sri Lanka, Colombo 08, Sri Lanka
| | - Raveen Hanwella
- Department of Psychological Medicine, Faculty of Medicine, University of Colombo, Kynsey Road, Colombo 08, Sri Lanka
| | - Varuni A de Silva
- Department of Psychological Medicine, Faculty of Medicine, University of Colombo, Kynsey Road, Colombo 08, Sri Lanka
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