Air pollution aggravates renal ischaemia-reperfusion-induced acute kidney injury.

Chronic kidney disease (CKD) has emerged as a significant global public health concern. Recent epidemiological studies have highlighted the link between exposure to fine particulate matter (PM2.5) and a decline in renal function. PM2.5 exerts harmful effects on various organs through oxidative stress and inflammation. Acute kidney injury (AKI) resulting from ischaemia-reperfusion injury (IRI) involves biological processes similar to those involved in PM2.5 toxicity and is a known risk factor for CKD. The objective of this study was to investigate the impact of PM2.5 exposure on IRI-induced AKI. Through a unique environmentally controlled setup, mice were exposed to urban PM2.5 or filtered air for 12 weeks before IRI followed by euthanasia 48 h after surgery. Animals exposed to PM2.5 and IRI exhibited reduced glomerular filtration, impaired urine concentration ability, and significant tubular damage. Further, PM2.5 aggravated local innate immune responses and mitochondrial dysfunction, as well as enhancing cyclic GMP-AMP synthase-stimulator of interferon genes (cGAS-STING) pathway activation. This increased renal senescence and suppressed the anti-ageing protein klotho, leading to early fibrotic changes. In vitro studies using proximal tubular epithelial cells exposed to PM2.5 and hypoxia/reoxygenation revealed heightened activation of the STING pathway triggered by cytoplasmic mitochondrial DNA, resulting in increased tubular damage and a pro-inflammatory phenotype. In summary, our findings imply a role for PM2.5 in sensitising proximal tubular epithelial cells to IRI-induced damage, suggesting a plausible association between PM2.5 exposure and heightened susceptibility to CKD in individuals experiencing AKI. Strategies aimed at reducing PM2.5 concentrations and implementing preventive measures may improve outcomes for AKI patients and mitigate the progression from AKI to CKD. © 2024 The Authors. The Journal of Pathology published by John Wiley & Sons Ltd on behalf of The Pathological Society of Great Britain and Ireland.

Who gets burned in Brazil?

Burns are preventable injuries that still represent a relevant public health issue. The identification of risk factors might contribute to the development of specific preventive strategies. Data of patients admitted at the Hospital due to acute burn injuries from May 2017 to December 2019, was extracted manually from medical records. The population was analyzed descriptively, and differences between groups were tested using the appropriate statistical test. The study population consisted of 370 patients with burns admitted to the Hospital burn unit during the study period. The majority of the patients were males (257/370, 70%), median age was 33 (IQR:18-43), median TBSA% was 13 (IQR 6.35-21.5 and range 0-87.5%), and 54% of patients had full thickness burns (n=179). Children younger than 13 years old represented 17% of the study population (n=63), 60% of them were boys (n= 38), and scalds was the predominant mechanism of burn injury (n= 45). No children died, however 10% of adults did (n= 31). Self-inflicted burns were observed in 16 adults (5%), of whom 6 (38%) died during admission, however self-inflicted burns were not observed in children. Psychiatric disorders and substance misuse were frequent in this subgroup. White adults male from urban areas who had not completed primary school degree were the major risk group for burns. Smoking and alcohol misuse were the most frequent comorbidities. Accidental domestic flame burns were the predominant injuries in the adult population and scalds in the pediatric.

Online medical education: A student survey.

BACKGROUND: During COVID-19, medical schools transitioned to online learning as an emergency response to deliver their education programmes. This multi-country study compared the methods by which medical schools worldwide restructured the delivery of medical education during the pandemic. METHODS: This multi-country, cross-sectional study was performed using an internet-based survey distributed to medical students in multiple languages in November 2020. RESULTS: A total of 1,746 responses were received from 79 countries. Most respondents reported that their institution stopped in-person lectures, ranging from 74% in low-income countries (LICs) to 93% in upper-middle-income countries. While only 36% of respondents reported that their medical school used online learning before the pandemic, 93% reported using online learning after the pandemic started. Of students enrolled in clinical rotations, 89% reported that their rotations were paused during the pandemic. Online learning replaced in-person clinical rotations for 32% of respondents from LICs versus 55% from high-income countries (HICs). Forty-three per cent of students from LICs reported that their internet connection was insufficient for online learning, compared to 11% in HICs. CONCLUSIONS: The transition to online learning due to COVID-19 impacted medical education worldwide. However, this impact varied among countries of different income levels, with students from LICs and lower middle income countries facing greater challenges in accessing online medical education opportunities while in-person learning was halted. Specific policies and resources are needed to ensure equitable access to online learning for medical students in all countries, regardless of socioeconomic status.

Gender-Based Discrimination Among Medical Students: A Cross-Sectional Study in Brazil.

INTRODUCTION: Gender-based discrimination (GBD) creates a hostile environment during medical school, affecting students' personal life and academic performance. Little is known about how GBD affects the over 204,000 medical students in Brazil. This study aims to explore the patterns of GBD experienced by medical students in Brazil. METHODS: This is a cross-sectional study using an anonymous, Portuguese survey disseminated in June 2021 among Brazilian medical students. The survey was composed of 24 questions to collect data on GBD during medical school, formal methods for reporting GBD, and possible solutions for GBD. RESULTS: Of 953 responses, 748 (78%) were cisgender women, 194 (20%) were cisgender men, and 11 (1%) were from gender minorities. 65% (616/942) of respondents reported experiencing GBD during medical school. Women students experienced GBD more than men (77% versus 22%; P < 0.001). On comparing GBD perpetrator roles, both women (82%, 470/574) and men (64%, 27/42) reported the highest rate of GBD by faculty members. The occurrence of GBD by location differed between women and men. Only 12% (115/953) of respondents reported knowing their institution had a reporting mechanism for GBD. CONCLUSIONS: Most respondents experienced GBD during medical school. Cisgender women experienced GBD more than cisgender men. Perpetrators and location of GBD differed for men and women. Finally, an alarming majority of students did not know how to formally report GBD in their schools. It is imperative to adopt broad policy changes to diminish the rate of GBD and its a consequential burden on medical students.

Gender Discrimination, Career Aspirations, and Access to Mentorship Among Medical Students in Brazil.

INTRODUCTION: Gender-based discrimination (GBD) creates a hostile environment that can affect medical students. Mentorship has been recognized as a mitigating factor for GBD. We aimed to investigate the impacts of GBD on career selection and well-being of medical students in Brazil and to explore access to mentorship among these students. METHODS: A cross-sectional study was performed using an anonymous survey in Portuguese. The survey was distributed in June 2021 to students enrolled in Brazilian medical schools. It contained 24 questions, including demographics, episodes of GBD experienced by responders and their impact on professional and personal life, and mentorship access. RESULTS: Of 953 respondents, 748 (78%) were cisgender women, 194 (20%) cisgender men, and 11 nonbinary (1%). Sixty-six percent (625/953) of students reported experiencing GBD, with cisgender women and nonbinary being more likely to experience it than cisgender men (P < 0.001). Responders who experiences GBD report moderate to severe impact on career satisfaction (40%, 250/624), safety (68%, 427/624), self-confidence (68%, 426/624), well-being (57%, 357/625), and burnout (62%, 389/625). Cisgender women were more likely to report these effects than men counterparts (P < 0.01). Only 21% of respondents (201/953) had mentors in their medical schools. CONCLUSIONS: Our findings demonstrate that GBD is widespread among Brazilian medical students affecting their personal and professional lives, and most of them do not have access to a mentor. There is an urgent need to increase access to mentors who could mitigate the adverse effects of GBD and help develop a diverse and inclusive medical workforce.

Evolution of Gender Disparities Among Brazilian Surgical, Anesthesia, and Obstetric Providers.

INTRODUCTION: Since 2010, most graduating physicians in Brazil have been female, nevertheless gender disparities among surgical specialties still exist. This study aims to explore whether the increase in female physicians has translated to increased female representation among surgical specialties in Brazil. METHODS: Data on gender, years of practice, and specialty was extracted from Demografia Médica do Brasil, from 2015 to 2020. The percentage of women across 18 surgical, anesthesia, and obstetric (SAO) specialties and the relative increases in female representation during the study period were calculated. RESULTS: Of the 18 SAO specialties studied, 16 (88%) were predominantly male (>50%). Only obstetrics/gynecology and breast surgery showed a female predominance, with 58% and 52%, respectively. Urology, neurosurgery, and orthopedic surgery and traumatology were the three specialties with the largest presence of men - and the lowest absolute growth in the female workforce from 2015 to 2020. CONCLUSIONS: In Brazil, where significant gender disparities persist, women are still underrepresented in surgical specialties. Female presence is predominant in surgical specialties dedicated to the care of female patients, while it remains poor in those with male patient dominance. Over the last 5 y, the proportion of women working in SAO specialties has grown, but not as much as in nonsurgical specialties. Future studies should focus on investigating the causes of gender disparities in Brazil to understand and tackle the barriers to pursuing surgical specialties.

Is authorship by women in Brazilian academic surgery increasing? A five-year retrospective analysis.

Women remain underrepresented in 80% of Brazilian surgical specialties, however, women representation within the Brazilian academic surgical literature remains unknown. This study aims to evaluate the gender distribution of first and last authors in Brazilian surgical journals. All publications between 2015 and 2019 from the five Brazilian surgical journals with the highest impact factor were reviewed. The first and last authors' names were extracted from each article and a predictive algorithm was used to classify the gender of each author. Authors were further classified by surgical field and geographic region to investigate patterns of female authorship among journals, specialties, and region over the study period. Multivariable logistic regression was then used to identify factors independently associated with female authorship. 1844 articles were analyzed; 23% (426/1844) articles had female first authors, and 20% (348/1748) had female last authors. Acta Cirúrgica Brasileira was observed to have the highest rates for both first and last female authors (37%, 138/371; 26%, 95/370)) and Revista Brasileira de Ortopedia (9%, 48/542; 10%, 54/522) had the lowest rates. Papers with a woman senior author were twice as likely to have a woman first author (OR 1.98, 95% CI 1.51-2.58, p≤0.01). Women's representation in medicine is increasing in Brazil, yet women remain underrepresented as the first and last authors in the Brazilian surgical literature. Our results highlight the importance of senior women mentorship in academic surgery and demonstrate that promoting female surgeon senior authorship through academic and financial support will positively impact the number of female first authors.