No Effect of Adjunctive Minocycline Treatment on Body Metabolism in Patients With Schizophrenia.

PURPOSE/BACKGROUND: This study examined the effect of adjunctive minocycline on body metabolism in risperidone-treated patients with schizophrenia. METHODS/PROCEDURES: Each subject had a Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition diagnosis of schizophrenia and had been on stable dose of risperidone for at least 4 weeks. In a 16-week randomized, double-blind, placebo-controlled study, subjects received either minocycline (200 mg/d) or placebo. Various metabolic parameters, including weight, waist circumference, fasting insulin, glucose, and lipids, were measured at baseline and week 16. FINDINGS/RESULTS: A total of 63 subjects with schizophrenia were enrolled in the study. Fifty-five patients completed week-16 assessments (27 in the minocycline group, 28 in the placebo group). There were no significant differences between the 2 groups in week 16 changes for body weight, body mass index, waist circumference, fasting insulin, glucose, and lipids (P's > 0.300). IMPLICATIONS/CONCLUSIONS: In the present study, adjunctive treatment of minocycline did not seem to improve body metabolism in patients with schizophrenia receiving risperidone. The implications for future studies were discussed.

Contralateral acupuncture for migraine without aura: a randomized trial protocol with multimodal MRI.

Introduction: Migraine is a common clinical disorder, ranks as the second most disabling disease worldwide, and often manifests with unilateral onset. Contralateral acupuncture (CAT), as a classical acupuncture method, has been proven to be effective in the treatment of migraine without aura (MWoA). However, its neural mechanisms have not been investigated using multimodal magnetic resonance imaging (MRI). Methods and analysis: In this multimodal neuroimaging randomized trial, a total of 96 female MWoA participants and 30 female healthy controls (HCs) will be recruited. The 96 female MWoA participants will be randomized into three groups: Group A (CAT group), Group B [ipsilateral acupuncture (IAT) group], and Group C (sham CAT group) in a 1:1:1 allocation ratio. Each group will receive 30 min of treatment every other day, three times a week, for 8 weeks, followed by an 8-week follow-up period. The primary outcome is the intensity of the migraine attack. Data will be collected at baseline (week 0), at the end of the 8-week treatment period (weeks 1-8), and during the 8-week follow-up (weeks 9-16). Adverse events will be recorded. Multimodal MRI scans will be conducted at baseline and after 8-week treatment. Discussion: This study hypothesized that CAT may treat MWoA by restoring pathological alterations in brain neural activity, particularly by restoring cross-integrated functional connectivity with periaqueductal gray (PAG) as the core pathological brain region. The findings will provide scientific evidence for CAT in the treatment of MWoA. Ethics and dissemination: The Medical Ethics Committee of the Second Affiliated Hospital of Yunnan University of Chinese Medicine has given study approval (approval no. 2022-006). This trial has been registered with the Chinese Clinical Trials Registry (registration no. ChiCTR2300069456). Peer-reviewed papers will be used to publicize the trial's findings. Clinical trial registration: https://clinicaltrials.gov/, identifier ChiCTR2300069456.

Changes in plasma levels of nitric oxide metabolites and negative symptoms after 16-week minocycline treatment in patients with schizophrenia.

OBJECTIVE: This study examined the effect of adjunctive minocycline on psychopathology and possibly relevant biomarkers in patients with schizophrenia. METHOD: In a 16-week randomized, double-blind, placebo-controlled study, subjects received either minocycline (200mg per day) or placebo. Psychopathology was assessed using the Scale for the Assessment of Negative Symptoms (SANS) and the Positive and Negative Syndrome Scale (PANSS) at baseline and week 16. Plasma levels of tumor necrosis factor α (TNFα), interleukin-1 ß (IL-1ß) and nitric oxide metabolites were assessed at both time points. RESULTS: Fifty-five patients completed the study (27 in the minocycline group, 28 in the placebo group). The minocycline group had significant decreases in the SANS total sore, the PANSS total score and the PANSS negative symptoms score at week 16 compared to the placebo group. In addition, the minocycline group had a significant decrease in plasma levels of nitric oxide metabolites, but no significant difference in changes in plasma levels of IL-1ß or TNF-α, compared to the placebo group at week 16. Further, the more decrease in plasma levels of nitric oxide metabolites was associated with less improvement in negative symptoms. CONCLUSION: The beneficial effect of adjunctive minocycline treatment on negative symptoms might be through mechanisms other than the nitric oxide pathway. The implications for future studies were discussed.

Minocycline supplementation for treatment of negative symptoms in early-phase schizophrenia: a double blind, randomized, controlled trial.

BACKGROUND: It is difficult to improve negative symptoms and cognitive impairments in schizophrenia. A previous pilot study has shown that minocycline, a semi-synthetic second-generation tetracycline, is effective in treating for negative and/or cognitive symptoms in schizophrenia. OBJECTIVES: The present study was designed to examine the efficacy and safety of minocycline for the treatment of negative symptoms and cognitive impairments in patients with schizophrenia. METHODS: Ninety-two patients with early stage schizophrenia treated with risperidone entered this 16-week, double blind, randomized, placebo-controlled clinical trial. Subjects were randomly assigned to receive minocycline (200mg per day) or the placebo. The primary outcome was evaluated using the Scale for the Assessment of Negative Symptoms (SANS). Secondary outcomes included the response rate of SANS, the Positive and Negative Syndrome Scale (PANSS), the Clinical Global Impression Scale (CGI), and cognitive tests. RESULTS: Subjects receiving minocycline had greater improvements on SANS total scores and PANSS negative subscale scores (P<0.001) when compared with those receiving the placebo. Rates of treatment response (43.6%) in the minocycline group were significantly higher than those in the placebo group (10.0%) after 16weeks of treatment. There was no significant difference between the seven cognitive domains (P>0.05), except for the attention domain (P=0.044). CONCLUSIONS: The addition of minocycline to atypical antipsychotic drugs in early schizophrenia had significant efficacy on negative symptoms but had a slight effect on the attention domains of patients with schizophrenia. It may be considered as a new adjunct treatment for negative symptoms of schizophrenia. Clinical trials.gov identifier: NCT01493622.