Therapeutic Cell Protective Role of Histochrome under Oxidative Stress in Human Cardiac Progenitor Cells.

Cardiac progenitor cells (CPCs) are resident stem cells present in a small portion of ischemic hearts and function in repairing the damaged heart tissue. Intense oxidative stress impairs cell metabolism thereby decreasing cell viability. Protecting CPCs from undergoing cellular apoptosis during oxidative stress is crucial in optimizing CPC-based therapy. Histochrome (sodium salt of echinochrome A-a common sea urchin pigment) is an antioxidant drug that has been clinically used as a pharmacologic agent for ischemia/reperfusion injury in Russia. However, the mechanistic effect of histochrome on CPCs has never been reported. We investigated the protective effect of histochrome pretreatment on human CPCs (hCPCs) against hydrogen peroxide (H2O2)-induced oxidative stress. Annexin V/7-aminoactinomycin D (7-AAD) assay revealed that histochrome-treated CPCs showed significant protective effects against H2O2-induced cell death. The anti-apoptotic proteins B-cell lymphoma 2 (Bcl-2) and Bcl-xL were significantly upregulated, whereas the pro-apoptotic proteins BCL2-associated X (Bax), H2O2-induced cleaved caspase-3, and the DNA damage marker, phosphorylated histone (γH2A.X) foci, were significantly downregulated upon histochrome treatment of hCPCs in vitro. Further, prolonged incubation with histochrome alleviated the replicative cellular senescence of hCPCs. In conclusion, we report the protective effect of histochrome against oxidative stress and present the use of a potent and bio-safe cell priming agent as a potential therapeutic strategy in patient-derived hCPCs to treat heart disease.

Knowledge attitude and practice of antibiotic use among medical students in Bangladesh: A cross-sectional study.

Background and Aims: Antibiotic misuse represent a significant global health challenge, with medical students positioned as key figures in promoting responsible antibiotic usage. This study investigates the knowledge, attitudes, and practices (KAP) regarding antibiotic use among medical students in Bangladesh, aiming to identify areas for targeted educational and policy interventions. Methods: This cross-sectional survey was conducted among 501 medical students across various years of study in Bangladesh, collecting data over a 3-month period. The survey assessed antibiotic knowledge, usage practices, and attitudes towards misuse, employing descriptive statistics and multiple logistic regression analyses to explore associations between students' demographic characteristics and their KAP towards antibiotics. Significance was assigned at p-value < 0.05. Results: In our study involving 501 medical students from four medical colleges in Bangladesh, we achieved a 76% response rate. Among the participants, 78.24% correctly identified antibiotics' effectiveness against bacterial infections, but 45.71% were uncertain about their efficacy against viral infections. Notably, 21.20% reported self-prescribing antibiotics, predominantly sourced from physician prescriptions (54.89%). The most common reason for antibiotic use was fever (19.02%). Senior students were less likely to have good knowledge compared to junior students, and urban students demonstrated a higher likelihood of good knowledge and positive attitude towards antibiotic resistance. Conclusion: This study highlights the critical need for educational reforms and antimicrobial stewardship among medical students in Bangladesh to combat antibiotic misuse and mitigate antimicrobial resistance.

Workplace violence, bullying, burnout, job satisfaction and their correlation with depression among Bangladeshi nurses: A cross-sectional survey during the COVID-19 pandemic.

BACKGROUND: Depression is one of the most serious yet understudied issues among Bangladeshi nurses, bringing health dangers to this workforce. This study aimed to investigate how workplace violence (WPV), bullying, burnout, and job satisfaction are correlated with depression and identify the factors associated with depression among Bangladeshi nurses. METHODS: For this cross-sectional study, data were collected between February 26, 2021, and July 10, 2021 from the Bangladeshi registered nurses. The Workplace Violence Scale (WPVS), the Short Negative Acts Questionnaire [S-NAQ], the Burnout Measure-Short version (BMS), the Short Index of Job Satisfaction (SIJS-5), and the Patient Health Questionnaire (PHQ-9) were used to measure WPV, bullying, burnout, job satisfaction, and depression, respectively. Inferential statistics include Pearson's correlation test, t-test, one-way ANOVA test, multiple linear regression, and multiple hierarchal regression analyses were performed. RESULTS: The study investigated 1,264 nurses (70.02% female) with an average age of 28.41 years (SD = 5.54). Depression was positively correlated with WPV, bullying, and burnout and negatively correlated with job satisfaction (p <0.001). According to the multiple linear regression model, depression was significantly lower among nurses with diploma degrees (ß = -1.323, 95% CI = -2.149 to -0.497) and bachelor's degrees (ß = -1.327, 95% CI = -2.131 to- 0.523) compared to the nurses with master's degree. The nurses who worked extended hours (>48 hours) had a significantly higher depression score (ß = 1.490, 95% CI = 0.511 to 2.470) than those who worked ≤ 36 hours. Depression was found to be significantly higher among those who did not receive a timely salary (ß = 2.136, 95% CI = 1.138 to 3.134), rewards for good works (ß = 1.862, 95% CI = 1.117 to 2.607), and who had no training on WPV (ß = 0.895, 95% CI = 0.092 to 1.698). CONCLUSIONS: Controlling burnout, bullying, and workplace violence, as well as improving the work environment for nurses and increasing job satisfaction, are the essential indicators of reducing depression. This can be accomplished with integrative support from hospital executives, policymakers, and government officials.