Inactivation of the melanocortin-4 receptor (MC4-R) by gene-targeting results in mice that develop maturity-onset obesity, hyperinsulinemia, and hyperglycemia. These phenotypes resemble common forms of human obesity, which are late-onset and frequently accompanied by NIDDM. It is not clear whether sequence variation of the MC4-R gene contributes to obesity in humans. Therefore, we examined the human MC4-R gene polymorphism in 190 individuals ascertained on obesity status. Three allelic variants were identified, including two novel ones, Thr112Met and Ile137Thr. To analyze possible functional alterations, the variants were cloned and expressed in vitro and compared with the wild-type receptor. One of the novel variants, Ile137Thr, identified in an extremely obese proband (BMI 57), was found to be severely impaired in ligand binding and signaling, raising the possibility that it may contribute to development of obesity. Furthermore, our results also suggest that sequence polymorphism in the MC4-R coding region is unlikely to be a common cause of obesity in the population studied, given the low frequency of functionally significant mutations.

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Background Medications for opioid use disorder (MOUD) significantly reduce morbidity and mortality from opioid use disorder (OUD). To prescribe MOUD, physicians must obtain a DEA waiver through requirements outlined in the Drug Addiction Treatment Act of 2000 (DATA 2000). We developed an Addiction Medicine curriculum that features DATA 2000 waiver training at the Robert Larner, MD College of Medicine (LCOM). Methods All third-year medical students completed a virtual DATA 2000 waiver training at the commencement of clinical clerkships. We conducted a curriculum needs assessment followed by pre- and post-training surveys to evaluate MOUD pharmacology knowledge and best prescribing practices. Results Of LCOM students surveyed, 77.6% reported interest in being waivered to prescribed MOUD for OUD treatment. Third-year medical students demonstrated increases in both MOUD Pharmacology Knowledge from 64.2% to 84.8% (chi-squared = 40.8; p < .001) and MOUD Best Prescribing Practices from 55.9% to 75.2% (chi-squared = 29.9; p < .001). Discussion Surveys showed the majority of students felt waiver training was relevant to their future practice. An online DATA 2000 waiver training format effectively improved student knowledge of MOUD. Conclusion: This curriculum exposed medical students to DATA 2000 waiver training, MOUD pharmacology and best practices, and increased the number of future physicians eligible to treat OUD using MOUD.

Background:The November 2010 Joint Commission Sentinel Event Alert on the prevention of suicides in medical/surgical units and the emergency department (ED) mandates screening every patient treated as an outpatient or admitted to the hospital for suicide risk. Our aim was to develop a suicide risk assessment tool to (1) predict the expert psychiatrist's assessment for risk of committing suicide within 72 hours in the hospital, (2) replicate the recommended intervention by the psychiatrist, and (3) demonstrate acceptable levels of participant satisfaction.