Exercise and Worsening of Extrapyramidal Symptoms during Treatment with Long-Acting Injectable Antipsychotics

Hyperbaric Oxygen Therapy Ameliorates Olanzapine-Induced Hypolocomotion in a Rat Model

Olanzapine (OLZ) is a commonly prescribed drug for the treatment of schizophrenia and related disorders. However, OLZ use is associated with several adverse effects, including decreased locomotor activity and increased body weight. While the majority of studies have directed their focus towards managing the metabolic side effects of OLZ, there has been limited attention given to the effects on locomotor activity. This study aimed to investigate the potential therapeutic effect of hyperbaric oxygen therapy (HBOT) in alleviating OLZ-induced locomotor impairment in female Sprague Dawley rats. Subjects were divided into four groups: control rats (CR), HBOT, OLZ, and HBOT + OLZ. In addition to behavioral effects, we also evaluated the total antioxidant capacity (TAC) of rats' brain tissue to demonstrate the maintenance of OLZ effectiveness in improving antioxidant status during the intervention using a rotarod device to measure locomotor activity and coordination. Results showed that HBOT effectively counteracted the hypolocomotion produced after OLZ administration. Moreover, HBOT did not result in a decrease in TAC in brain tissue, which is linked to OLZ treatment effectiveness. Therefore, our results suggest that HBOT may represent a promising non-pharmacological approach to improving locomotor and motor coordination impairments associated with OLZ treatment.

Clinical considerations and pitfalls in the use of depot antipsychotics

Long-acting injectable antipsychotics (LAI) is a frequently used treatment modality which has advantages over oral antipsychotics regarding hospitalization or relapse prevention. However, the pharmacokinetic properties of LAI greatly differ from oral antipsychotics. This necessitates an increased knowledge about LAI among clinicians, especially when commencing treatment, changing doses and discontinuing treatment. In this review, we summarize an array of clinically important characteristics of LAI and give a conceptual framework for understanding the pharmacokinetics of LAI.

Effects of exercise intervention on psychotic symptoms: A meta-analysis and hypothetical model of neurobiological mechanisms

There is conflicting evidence on the efficacy of exercise as intervention for psychosis. This article aims to analyze the effect of exercise on psychotic symptoms. A database search was conducted in PubMed, Web of Science, Scopus, ScienceDirect, EBSCO and Cochrane CENTRAL, based on a protocol (PROSPERO: CRD42022326944). Papers available by March 2023 assessing exercise interventions in psychotic patients were included. A significant improvement was found in Positive and Negative Syndrome Scale (PANSS) positive symptoms (MD = -0.75 [-1.35, -0.15], p = 0.01), with large effect sizes for PANSS-negative and general symptoms (-2.14 [-3.36, -0.92]) and (-2.53 [-3.15, -1.91]), respectively. Heterogeneity was high among studies, 49 and 73% for PANSS-positive and negative symptoms, and low, 0%, for general symptoms. It was hypothesized that functioning of specific brain areas, such as the temporal lobe and hippocampus, may underlie the improvement seen with exercise. Based on neuroimaging/neurophysiology studies, we propose a neurobiological model accounting for the association between exercise and psychotic symptom improvement.

Effects of Aerobic, Resistance, and Combined Exercise Training on Psychiatric Symptom Severity and Related Health Measures in Adults Living With Schizophrenia: A Systematic Review and Meta-Analysis

Previous research has demonstrated the efficacy, effectiveness, and safety of exercise training in persons living with schizophrenia. However, the optimal exercise training program remains unclear. The aim of this paper was to conduct a systematic review and meta-analysis of the effects of aerobic, resistance, and combined aerobic and resistance training on health-related physical fitness and positive and negative symptoms in persons living with schizophrenia. Six electronic databases were searched systematically from their inception to December 2020 [MEDLINE, Embase, Cochrane Central Register of Controlled Trials (CENTRAL), Web of Science, SPORTDiscus, and Cumulative Index to Nursing and Allied Health Literature (CINAHL)] to identify literature examining the effects of exercise training on psychiatric symptoms and health-related physical fitness indicators in persons living with schizophrenia. A total of 22 studies (n = 913) were included in this review, and 12 studies (n = 554) included within the meta-analysis reported the effects of exercise training (aerobic, resistance, and combined aerobic and resistance) in persons living with schizophrenia. Aerobic training had a significant decrease on Positive and Negative Syndrome Scale (PANSS) negative scores (ES -2.28, 95% CI -3.57 to -1.00; p = 0.0005) and PANSS general scores (ES -2.51, 95% CI -3.47 to -1.55; p < 0.00001). Resistance training did not lead to significant effects on PANSS total scores. Combined aerobic and resistance training did not lead to significant changes in body mass index, PANSS positive scores, or PANSS total scores. However, grouping together the results from all exercise training modalities (including aerobic training, resistance training, and combined aerobic and resistance training) revealed significant effects on body mass index (ES 1.86, 95% CI 0.84 to 2.88; p = 0.0003), maximal/peak oxygen consumption (ES 2.54, 95% CI 1.47 to 3.62; p = < 0.00001), body weight (ES 6.58, 95% CI 2.94 to 10.22; p = 0.0004), PANSS negative scores (ES -1.90, 95% CI -2.70 to -1.10; p < 0.00001), and Scale for the Assessment of Negative Symptoms (SANS) total (ES -14.90, 95% CI -22.07 to -7.74; p < 0.0001). Collectively, these findings support the importance of exercise participation (aerobic and resistance training) in persons living with schizophrenia.