Systematic review and meta-analysis
Adjunctive melatonin for tardive dyskinesia in patients with schizophrenia: a meta-analysis
Chen-Hui SUN, Wei ZHENG, Xin-Hu YANG, Dong-Bin CAI, Chee H. NG, Gabor S. UNGVARI, Hai-Yan LI, Yu-Jie
Background: Tardive dyskinesia (TD) is characterized by abnormal and involuntary movements. Importantly,TD could cause considerable personal suffering and social and physical disabilities.
Aims: This meta-analysis based on randomized controlled trials (RCTs) systematically assessed the therapeutic effect and tolerability of melatonin for TD in schizophrenia.
Methods: A computerized and systematical search of both Chinese (Wanfang Data, Chinese National Knowledge Infrastructure (CNKI), SINOMED) and English (PubMed, PsycINFO, Embase, Cochrane Library databases) databases, from their inception until June 8, 2017, was conducted by two independent authors.The severity of TD symptoms were the primary outcome measure and analyzed using a random effects model by the Review Manager (RevMan) Version 5.3. Quality evaluation of included RCTs was conducted using the Cochrane risk of bias and Jadad scale. The GRADE (Grades of Recommendation, Assessment,Development, and Evaluation) system recommendation grading method was used to assess the overall quality level of meta-analytic outcomes.
Results: Four RCTs (n=130) were identified and analyzed. Three RCTs used double blind and 1 RCT used masked assessors using the Cochrane risk of bias, and 3 RCTs were rated as high quality based on Jadad scale. Compared with the control group, adjunctive melatonin was superior in reducing the severity of TD as measured by the Abnormal Involuntary Movement Scale (AIMS) (4 RCTs, n=130, weighted mean difference (WMD): -1.52 (95% confidence intervals (CI): -3.24, 0.20), p=0.08; I2=0%) although the improvement did not reach a significant level. The overall evidence quality of the improvement of TD symptoms, according to GRADE approach, was rated as “Low”. The data on the ADRs and cognitive effect were limited.
Conclusions: This meta-analysis shows that melatonin has potential for improving TD symptoms in schizophrenia. Future higher quality and larger RCTs are warranted to confirm the findings.
Key words: Tardive dyskinesia; antipsychotic; melatonin; meta-analysis
Original research article
Changes in cognitive function in patients with primary insomnia
Hui GUO, Meijie WEI, Wantao DING
Background: Neuropsychological evidence is not sufficient concerning whether there is cognitive impairment in patients with primary insomnia. Further study is needed in this regard.
Aims: To measure the changes in cognitive functioning in patients with primary insomnia.
Results: The insomnia group had significantly lower scores than the control group in the naming (t=3.17,p=0.002), immediate memory (t=3.33, p=0.001), and delayed recall (t=6.05, p=0.001) sections of the MoCA,as well as a lower overall score on the MoCA (t=3.24, p=0.002). Participants with different degrees of insomnia also had significantly different scores in naming (F=7.56, p=0.001), language (F=3.22, p=0.045), total score (F=6.72, p=0.002), delayed memory (F=8.41, p=0.001), and delayed recall (F=22.67, p=0.001) sections of the MoCA. The age of primary insomnia patients was correlated to MoCA total score, immediate memory,delayed recall, and delayed recognition function, also with statistical significance. The years of education of primary insomnia patients was also significantly correlated to overall MoCA score, as well as visuospatial and executive function, naming, attention, language, and abstraction sections of the MoCA.
Conclusion: Primary insomnia patients have cognitive impairment. The more severe the insomnia is, the wider the range of and the more serious the degree of cognitive impairment is.
Key words: primary insomnia, cognitive function, episodic memory, influencing factors
Background: Schizophrenia is characterized by abnormal perception, thinking, emotions, and behaviors.Cognitive dysfunction is acknowledged as one of the most pivotal symptoms in schizophrenia. In addition to positive or negative symptoms, which had been proposed by Gallhofer in the early 1970s, schizophrenia patients suffered from cognitive impairments as well. Many studies show that there is genetic susceptibility in the first grading kinship of patients with schizophrenia. Patients with schizophrenia have cognitive impairment not only in the acute phase but also in the stable phase. Studies also show that the healthy first-grading relatives of patients with schizophrenia suffer from cognitive defects. However, there is still a lack of studies about the cognitive features of biological parents of those with schizophrenia. In this study,we speculate the biological parents of schizophrenia patients have specific cognitive dysfunction. And we explore the patterns of cognition among both schizophrenia patients and their biological parents using the Chinese version of MATRICS Consensus Cognitive Battery (MCCB).
Background: Pregnancy is a period of transition, which makes women more vulnerable and in unfavorable conditions may lead to psychopathology in both mother and infant. It is essential to outline factors adversely affecting the resolution of this period. Early interventions and why they matter: Interventions during pregnancy can provide important improvement in the outcome for both maternal and infant mental health.
Background: Serotonergic system dysfunction has been implicated in obsessive-compulsive disorder (OCD).This study examined peripheral SLC6A4 gene expression in OCD patients and healthy controls to explore the relationship between SLC6A4 and OCD.
Forum
Summary: The etiology of Major Depressive Disorder (MDD) is still unclear. We reviewed the literature for the relationship between inflammatory signaling and cytokines in the pathogenesis of MDD. In addition, we provid evidence for adjunctive treatment using anti-inflammatory drugs to improve the therapeutic effect and prognosis. Finally, we explore the possible relationship between the pathogenesis of MDD and immune disturbances.
Case report
Summary: Hyponatremia is a rare, yet potentially life threatening complication of antipsychotics. Here,we report a case of a 45-year-old female diagnosed with schizophrenia who developed hyponatremia soon after addition of olanzapine to the existing treatment. This prompted us to evaluate the relationship between hyponatremia and olanzapine, as timely management is crucial. Naranjo algorithm established a “probable” causal relation between olanzapine and hyponatremia. Possible etiological reasons of this clinically significant and life threatening adverse event have been discussed. We report the case and the literature focusing on hyponatremia as a possible adverse event of olanzapine. Medical illnesses are often ignored or missed in patients with psychiatric disorders either due to patients’ inability to report complaints or non-serious attitude of physicians towards such patients. A high index of suspicion should be kept while dealing with this probable complication.
Summary: Compulsive water drinking or psychogenic polydipsia is now increasingly seen in psychiatric populations. Effects of increased water intake can lead to hyponatremia causing symptoms of nausea,vomiting , seizures, delirium and can even be life threatening if not recognized and managed early. Here we present a 35-year old adult who was diagnosed with psychogenic polydipsia and was successfully managed with a combination of pharmacotherapy, fluid restriction and psychosocial management.
Summary: Hashimoto’s thyroiditis is a rare condition associated mainly with neurological symptoms. It contains an abundant amount of auto-antibodies in the blood. Only a few cases of behavioral symptoms without significant neurological disturbances have been recorded in the literature. In this view, our case is unique as it was not associated with overt hypothyroid manifestations.
Biostatistics in psychiatry
Key words: independent t-test; paired t-test; pre- and post- treatment; matched paired data