Mechanistic modelling of targeted pulmonary delivery of dactinomycin iron oxide-loaded nanoparticles for lung cancer therapy.

With the increase in respiratory conditions including lung cancer post covid-19 pandemic, drug-loaded nanoparticulate dry powder inhalers (DPIs) can facilitate targeted lung delivery as a patient-friendly, non-invasive method. The aim of this work was to synthesise and optimise iron oxide nanoparticles (IONPs) containing dactinomycin as a model drug, using Quality by Design principles. Chitosan and sodium alginate were investigated as polymeric coatings. The mass median aerodynamic diameter (MMAD), fine particle fraction (FPF), burst-effect (BE), entrapment-efficiency and the emitted-dose (ED) were investigated in initial screening studies and outcomes used to set up a Design of Experiments. Results revealed that chitosan IONPs were superior to that of sodium alginate in delivering DPI with optimal properties [ED (89.9%), FPF (59.7%), MMAD (1.59 µm) and BE (12.7%)]. Design space for targeted IONPs included formulations containing 2.1-2.5% dactinomycin and 0.5-0.9% chitosan. Differential scanning calorimetry and X-ray diffraction and SEM-EDS analysis revealed effective formation of IONPs, and TEM images revealed the production of spherical IONPs with particle size of 4.4 ± 0.77 nm. This work overcame the light sensitivity of dactinomycin to potentially target the high molecular weight drugs to the lungs, with controlled delivery based on a reduced burst effect.

Knowledge and awareness of the general population and healthcare providers about retinoblastoma: It is time to know the glow.

Retinoblastoma is the most frequent primary intraocular tumour in childhood. Early detection of retinoblastoma is the key to successful management with a higher chance of survival. This study aims to assess the knowledge of the general population and healthcare providers about retinoblastoma in term of presentation, risk factors, timing for diagnosis, and complications. A cross-sectional study using an online survey was conducted in three Arab countries (Jordan, Saudi Arabia, and Iraq) between 28 August and 16 September 2020. The questionnaire tool was constructed based on an extensive literature review to explore the study's aim and objectives. Logistic regression was used to identify predictors of better knowledge about retinoblastoma. A total of 3676 participants were involved in the study (Jordan = 2654, Saudi Arabia = 604, and Iraq = 418). The average retinoblastoma knowledge score for the whole study population was 6.25 (SD = 4.12) out of 21, representing 29.8% (out of the maximum possible total score). Participants aged above 50 years old, married individuals, those with a secondary education level, those who work as professionals in industry, those who have more than four children, and those who reported that they were not in direct contact with a large number of children were less likely to be knowledgeable about retinoblastoma presentation, risk factors, the timing for diagnosis, and complications (P < .05). Early detection is the cornerstone for decreasing morbidity and mortality among children with retinoblastoma. However, the awareness and knowledge about retinoblastoma are very limited in our study population. Efforts should be directed at increasing awareness of both the general population and healthcare providers regarding retinoblastoma. Policymakers are responsible for improving knowledge and awareness about retinoblastoma to facilitate early detection of the disease by conducting awareness campaigns in addition to improve screening skills of healthcare providers and providing them with proper screening and diagnostic tools.

The beneficial effect of vanillin on 6-hydroxydopamine rat model of Parkinson's disease.

BACKGROUND: Parkinson's disease (PD) is a progressive neurodegenerative disorder that is related to neuroinflammation. Vanillin, which possesses both antioxidant, and anti-inflammatory properties, can be a candidate for neuroprotection in PD. OBJECTIVE: This study was aimed to investigate the effects of vanillin on the 6-hydroxydopamine (6-OHDA) rodent model of PD. METHODS: Male Wistar rats were administrated intraperitoneal (i.p) or oral vanillin at a dose of 20 mg/kg/day for 7 days that was started at three days before or seven days after intracerebral injection of 6-OHDA. The 6-OHDA-induced lesions were assessed behaviorally using the apomorphine rotation test, neurochemically via measuring striatal dopamine concentrations, and through immunohistochemistry. RESULTS: Both oral and IP vanillin at three days before or seven days after 6-OHDA lesioning exhbited significantly lower tight contralateral rotations upon apomorphine challenge, and higher striatal dopamine concentrations. CONCLUSIONS: Vanillin seems to offer protective properties against 6-OHDA lesion via preserving striatal dopamine levels.

Mental health status of the general population, healthcare professionals, and university students during 2019 coronavirus disease outbreak in Jordan: A cross-sectional study.

BACKGROUND: The emergence of COVID-19 global pandemic coupled with high transmission rate and mortality has created an unprecedented state of emergency worldwide. This global situation may have a negative impact on the psychological well-being of individuals which in turn impacts individuals' performance. This study aims to explore the prevalence of depression and anxiety among the GP, HCPs, and USs during COVID-19 outbreak, and to identify key population(s) who might need psychological intervention. METHODS: A cross-sectional study using an online survey was conducted in Jordan between 22 and 28 March 2020 to explore the mental health status (depression and anxiety) of the general population, healthcare professionals, and university students during the COVID-19 outbreak. The Patient Health Questionnaire (PHQ-9) and Generalized Anxiety Disorder-7 (GAD-7) were used to assess depression and anxiety among the study participants. Logistic regression analysis was used to identify predictors of depression and anxiety. RESULTS: The prevalence of depression and anxiety among the entire study participants was 23.8% and 13.1%, respectively. Anxiety was most prevalent across university students 21.5%, followed by healthcare professionals 11.3%, and general population 8.8%. Females among healthcare professionals and university students, divorced healthcare professionals, pulmonologists, and university students with history of chronic disease were at higher risk of developing depression. Females, divorced participants among the general population, and university students with history of chronic disease and those with high income (≥1,500 JD) were at higher risk of developing anxiety. CONCLUSIONS: During outbreaks, individuals are put under extreme stressful condition resulting in higher risk of developing anxiety and depression particularly for students and healthcare professionals. Policymakers and mental healthcare providers are advised to provide further mental support to these vulnerable groups during this pandemic.