CYP2D6 Genotype and Primaquine Treatment in Patients with Malaria, Venezuela.

We determined CYP2D6*4 and CYP2D6* genotypes and metabolizer phenotypes in 96 patients with suspected malaria in Venezuela and found intermediate or poor metabolizer phenotypes in ≈25% of cases. Nine of 44 malaria patients had Plasmodium vivax recurrence. Public health authorities should evaluate the benefits of increasing total doses of primaquine for treatment.

Uncovering the Role of DNA Repair Impairment in UVA-Induced Mutagenesis in Human Xeroderma Pigmentosum Variant Cells.

Ultraviolet A (UVA) radiation induces DNA damage both directly, by forming cyclobutane pyrimidine dimers (CPDs), and indirectly, by generating oxidative stress. Cells rely on nucleotide excision repair (NER) and translesion synthesis (TLS) to tolerate these lesions. Xeroderma pigmentosum variant (XP-V) cells, deficient in DNA polymerase eta (pol eta), exhibit a heightened risk of skin cancer due to impaired TLS.

Pedagogical Content Knowledge as a Lens for Transforming Teaching in Medical and Health Professions Education.

Pedagogical content knowledge (PCK) is the separate, topic-specific, specialized knowledge of educators that integrates subject matter expertise with effective teaching strategies in response to an identified learner misconception or to optimize teaching. Although PCK has been used for decades as a framework for understanding the often-tacit ability of an educator to educate well, little has been done to bring this framework into medical and health professions education. We provide examples of PCK in various contexts, including large -group lectures, problem-based learning sessions, and bedside teaching.

miR-107 represses and is sequestered by CUG repeats triggering the MSI2/miR-7 pathogenesis axis in myotonic dystrophy.

Myotonic dystrophy type 1 (DM1) is a multisystem genetic disorder characterized by muscle disease, including muscle atrophy partially originating from excessive autophagy. We have previously demonstrated that excessive Musashi-2 (MSI2) repressed the biogenesis of miR-7, which derepressed autophagy, ultimately contributing to muscle atrophy, but the root cause of MSI2 dysregulation is unknown. Herein, we investigate the intricate role of miR-107 in DM1 pathogenesis, focusing on its involvement in the MSI2>miR-7>autophagy axis as this microRNA (miRNA) directly regulates MSI2.