OBJECTIVES: To assess the healthcare workers' (HCWs) knowledge, attitude and practice (KAP) in relation to AR during the era of COVID-19, and identify the associated factors with good knowledge, positive attitude and good practice.

METHODS: A cross-sectional design was used to assess the KAP of HCWs in Najran, Kingdom of Saudi Arabia (KSA). A validated questionnaire was used to collect participants' data, which consisted of the following information; socio-demographics, knowledge, attitude and items for practice. Data were presented as percentages and median (IQR). Mann-Whitney and Kruskal Wallis tests were used to compare them. Logistic regression was used to identify the associated factors linked to KAP.

RESULTS: The study included 406 HCWs. Their median (IQR) knowledge score was 72.73% (27.27%-81.82%), attitude score was 71.43% (28.57%-71.43%) and practice score was 50% (0%-66.67%). About 58.1% of the HCWs stated that antibiotics could be used to treat COVID-19 infection; 19.2% of the participants strongly agreed and 20.7% agreed that during the COVID-19 pandemic, antibiotics were overused at their healthcare institutions. Only 18.5% strongly agreed and 15.5% agreed when asked whether antibiotics used properly for the right indication and duration can still result in AR. The significantly associated factors with good knowledge were nationality, cadre and qualification. A positive attitude was significantly associated with age, nationality and qualification. Good practice was significantly associated with age, cadre, qualification and working place.

METHODS: To this end, we evaluated the quantitative characteristics of top cited articles in the fields with a total citation (≥50) in the Web of Science (WoS) database. Using one-way independent ANOVA, data extracted spanning a period of 1980-2015 were analyzed, while the non-parametric data analysis uses Kruskal-Walis test.

RESULTS: Articles with 11 to 20 pages attract more citations followed by those within the range of zero to 10. Articles with upward 21 pages are the least cited. Surprisingly, articles with more than two authors are significantly (P<0.05) less cited and the citation decreases as the number of authors increased.

OBJECTIVE: This review aimed to provide an overview of the relationship between mevalonate pathway and bone metabolism, as well as agents which act through this pathway to achieve their therapeutic potential.

DISCUSSION: Mevalonate pathway produces farnesyl pyrophosphate and geranylgeranyl pyrophosphate essential in protein prenylation. An increase in protein prenylation favours bone resorption over bone formation. Non-nitrogen containing bisphosphonates inhibit farnesyl diphosphate synthase which produces farnesyl pyrophosphate. They are used as the first line therapy for osteoporosis. Statins, a well-known class of cholesterol-lowering agents, inhibit 3-hydroxy-3-methyl-glutaryl-coenzyme A (HMG-CoA) reductase, the rate-determining enzyme in the mevalonate pathway. It was shown to increase bone mineral density and prevent fracture in humans. Tocotrienol is a group of vitamin E commonly found in palm oil, rice bran and annatto bean. It causes degradation of HMG-CoA reductase. Many studies demonstrated that tocotrienol prevented bone loss in animal studies but its efficacy has not been tested in humans.

MATERIALS AND METHODS: Corneal epithelial cells were isolated from the corneas of rabbits (n = 6). The optimal dose of GH for CEC proliferation in both basal medium (BM) and cornea medium (CM) was determined via MTT (3-[4, 5-dimethyl thiazolyl-2]-2, 5-diphenyl tetrazolium bro- mide) assay. Morphology, gene and protein expressions, and cell cycle analysis of CECs were evaluated via phase contrast microscopy, real- time polymerase chain reaction, immunocytochemistry, and ow cytom- etry, respectively.

RESULTS: Corneal epithelial cells cultured in 0.0015% GH-supplemented media (BM + 0.0015% GH; CM + 0.0015% GH) demonstrated optimal proliferative capacity with normal polygonal- shaped morphology. Gelam honey potentiates cytokeratin 3 (CK3) gene expression in accordance with the cytoplasmic CK3 protein expression while retaining normal cell cycle of CECs.