Assessing Brazilian Medical Student Awareness About Global Surgery: A Survey-Based Study.

BACKGROUND: Global surgery is an interdisciplinary field that advocates for access to equitable, affordable surgical services for all people. Engaging medical students in the field can strengthen the surgical workforce in low- and middle-income countries. We aim to investigate Brazilian medical students' acknowledgment of global surgery and their preferred learning platforms. MATERIALS AND METHODS: We performed a cross-sectional study through an anonymous Portuguese survey on Google Forms, consisting of 30 mixed multiple-choice and five-point Likert scale questions. Students enrolled in a Brazilian medical school from the second to sixth academic year fulfilled inclusion criteria. The association between qualitative variables was assessed using Chi-square, Fisher's exact test, or binary logistic model. RESULTS: We received 1,345 responses from 208 medical schools. Only 20.9% (282/1,345) of participants reported awareness of global surgery, who were predominantly female. 96.5% (1,298/1,345) declared interest in knowing more about global surgery and participants indicated social media (71.6%, 202/282) as the prevalent manner to gain awareness on it, followed by webinars (63.5%, 179/282). Extracurricular classes were the most preferable option among students (61.4%, 827/1,345) to get acquainted with the field, followed by internships (59.4%, 812/1,345), workshops (57%, 767/1,345), and social media (53.4%, 730/1,345). The main obstacles to pursue a global surgery career were lack of national opportunities (32%, 431/1,345) and adequate training (25.4%, 341/1,345). CONCLUSION: We outlined the most strategic pathways to raising awareness on global surgery among Brazilian medical students, providing relevant insights on its education in similar settings.

Differentiation of human-induced pluripotent stem cell under flow conditions to mature hepatocytes for liver tissue engineering.

Hepatic differentiation of human-induced pluripotent stem cells (hiPSCs) under flow conditions in a 3D scaffold is expected to be a major step forward for construction of bioartificial livers. The aims of this study were to induce hepatic differentiation of hiPSCs under perfusion conditions and to perform functional comparisons with fresh human precision-cut liver slices (hPCLS), an excellent benchmark for the human liver in vivo. The majority of the mRNA expression of CYP isoenzymes and transporters and the tested CYP activities, Phase II metabolism, and albumin, urea, and bile acid synthesis in the hiPSC-derived cells reached values that overlap those of hPCLS, which indicates a higher degree of hepatic differentiation than observed until now. Differentiation under flow compared with static conditions had a strong inducing effect on Phase II metabolism and suppressed AFP expression but resulted in slightly lower activity of some of the Phase I metabolism enzymes. Gene expression data indicate that hiPSCs differentiated into both hepatic and biliary directions. In conclusion, the hiPSC differentiated under flow conditions towards hepatocytes express a wide spectrum of liver functions at levels comparable with hPCLS indicating excellent future perspectives for the development of a bioartificial liver system for toxicity testing or as liver support device for patients.