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Coronavirus-19 (COVID-19) is an emerging pandemic that has caused significant disruptions to education, resulting in marked scholar closures across the world. The present study documents the student perception of the online educational process at six universities in Saudi Arabia during the COVID-19 lockdown period. The individual variable factors, i.e., institution, sex, and blended learning, that might influence student perception were also investigated. In this respect, a questionnaire that assessed the impact of COVID-19 on the online learning process and student perception was emailed to a total of 17,230 students from 3 institutions (medical, applied health and dental students) affiliated with six universities in Saudi Arabia. Principal component analysis (PCA) was performed to determine the validity of the questionnaire. A total of 4850 (28%) students responded to the questionnaire and 46.9% (n = 2275) of the respondents were highly satisfied with their online education. Analyses of the scores from the students showed a highly significant difference (p = 0.000) between the male and female students. Applied health students (highly satisfied score = 63.13) were the most satisfied with their online education, while medical students (highly satisfied score = 39.3) were the least satisfied with this education. In addition, applied health, dental and medical students showed a significantly higher score in favor of blended learning after schools re-open (p = 0.000). Collectively, student satisfaction with online education was common, and blended learning was preferred over the traditional format by both genders and all the students. The present data provide interesting contributions and evidence for policy makers and implementers, which might be helpful for the judgment side of decision making.

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Silver nanoparticles (AgNPs) are the most common nanomaterials in consumer products. Therefore, it has been crucial to control AgNPs toxicological effects to improve their safety and increase the outcome of their applications. This work investigated the possible protective effect of thymoquinone (TQ) against AgNPs-induced hepatic and renal cytotoxicity in rats. Serum markers of liver and kidney functions as well as liver and kidney oxidative stress status, pro-in ammatory cytokines, apoptosis markers, and histopathology were assessed. TQ reversed AgNPs-induced elevation in serum liver and kidney function markers, including aspartate transaminase, alanine transaminase, urea, and creatinine. Moreover, TQ coadministration with AgNPs alleviates hepatic and renal oxidative insults by decreasing MDA and NO levels with a signi cant increase in the activity of antioxidant enzymes (superoxide dismutase, catalase, and glutathione recycling enzymes peroxidase and reductase) compared to AgNPs-treated rats. Besides, TQ upregulated hepatic and renal Nrf2 gene expression in AgNPs intoxicated rats. Furthermore, TQ coadministration decreased the hepatic and renal pro-in ammatory mediators represented by, IL-1β, TNF-α, TGF-β, and NF-κB levels. Besides, TQ co-administration decreased apoptotic protein (Bax) levels and increased the anti-apoptotic protein (Bcl-2) levels. These ndings were con rmed by the histopathological examination of hepatic and renal tissues. Our data a rmed the protective effect of TQ against AgNPs cytotoxicity and proposed a possible mechanism of TQ antioxidant, anti-in ammatory, and anti-apoptotic effects. Consequently, we could conclude that using TQ might control AgNPs toxicological effects, improve their safety, and increase the outcome of their applications.

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PCA (protocatechuic acid), a phenolic compound found in teas, fruits and vegetables, is widely recognized with its antioxidant and anti-in ammatory activities. Here we veri ed the protective role of PCA on carrageenan-induced paw edema in mice. PCA (25 mg/kg and 50 mg/kg) administration was applied for ve consecutive days prior to the carrageenan injection. Diclofenac sodium (20 mg/kg) was used as a reference drug. PCA pretreatment notably decreased the volume of the developed edema and alleviated the histopathological alterations induced by carrageenan. Additionally, PCA administration enhanced the cellular antioxidant capacity as demonstrated by the increased levels of catalase, superoxide dismutase and reduced glutathione, in addition to the decreased malondialdehyde level in the edematous tissue. Interestingly, PCA administration was able to suppress the developed in ammatory response upon carrageenan injection as indicated by the decreased levels and expression of proin ammatory cytokines and mediators including tumor necrosis factor alpha, interlukin-1 beta, interlukin-6, inducible nitric oxide synthase, nitric oxide, cyclooxygenase-II, prostaglandin E2, monocyte chemoattractant protein-1, myeloperoxidase and nuclear factor kappa B. These results collectively con rm the protective effect of PCA against carrageenan-induced paw edema owing to its antioxidant and anti-in ammatory characteristics.

BackgroundDiabetic foot syndrome is a complex and multifactorial disease process involving neuropathy, peripheral arterial disease, osteomyelitis, diabetic foot ulcer (DFU), and amputation. DFUs are a common and burdensome manifestation of the syndrome, responsible for diabetes-related morbidity and mortality. Successful management of DFU requires collaboration between patients and caregivers. This study assesses the knowledge, experience, and practices of the caregivers of diabetic foot patients in Saudi Arabia, highlighting the need for targeted interventions to improve knowledge and practices in certain subgroups of caregivers. MethodThe primary objective of this study was to evaluate the proficiency and practicality of caregivers who provide care to patients with diabetic foot in the Kingdom of Saudi Arabia. To accomplish this, a cross-sectional study was conducted among caregivers of diabetic foot patients who were aged 18 years or older and living in Saudi Arabia. The participants were randomly chosen to ensure that the sample was representative. The data collection process involved the distribution of a structured online questionnaire via various social media platforms. Prior to the distribution of the questionnaire, the participants were informed about the study's objectives, and their informed consent was obtained. Additionally, adequate measures were taken to ensure the confidentiality of the participants and their caregiving status. ResultsAmong the initial pool of 2990 participants, 1023 individuals were excluded from the study due to their status as non-caregivers of diabetic patients or being under the age of 18 years. Consequently, the final sample size consisted of 1921 caregivers. The majority of the participants were female (61.6%), married (58.6%), and had a bachelor's degree (52.4%). The findings revealed that 34.6% of caregivers were attending to patients with diabetic foot, of which 8.5% reported poor foot status and 9.1% reported amputation. Caregivers reported examining the patient's feet in 75.2% of cases, and the feet were cleaned and moisturized by either the patient or caregiver. Nails were trimmed by 77.8% of caregivers, and 49.8% of them did not permit patients to walk barefoot. Moreover, knowledge of diabetic foot care was positively correlated with being female, having a post-graduate degree, having personal experience with diabetes, caring for a patient with diabetic foot, and having prior experience in treating diabetic foot. Conversely, lower knowledge levels were associated with divorced or unemployed caregivers and those residing in the northern region. ConclusionThe present study highlights that caregivers of diabetic foot patients in Saudi Arabia possess a satisfactory level of knowledge and follow appropriate practices regarding foot care. Nonetheless, it is imperative to identify specific subgroups of caregivers who may require additional education and training to improve their knowledge and practices concerning diabetic foot care. The results of this study could potential...