Studying the interactions of nanoparticles (NPs) with serum proteins is necessary for the rational development of nanocarriers. Optimum surface chemistry is a key consideration to modulate the formation of the serum protein corona (PC) and the resultant immune response. We investigated the constituent of the PC formed by hyaluronic acid-coated chitosan NPs (HA-CS NPs). Non-decorated chitosan NPs (CS NPs) and alginate-coated chitosan NPs (Alg-CS NPs) were utilized as controls. Results show that HA surface modifications significantly reduced protein adsorption relative to controls. Gene Ontology analysis demonstrates that HA-CS NPs were the least immunogenic nanocarriers. Indeed, less inflammatory proteins were adsorbed onto HA-CS NPs as opposed to CS and Alg-CS NPs. Interestingly, HA-CS NPs differentially adsorbed two unique anti-inflammatory proteins (ITIH4 and AGP), which were absent from the PC of both controls. On the other hand, CS and Alg-CS NPs selectively adsorbed a proinflammatory protein (Clusterin) that was not found on the surfaces of HA-CS NPs. While further studies are needed to investigate abilities of the PCs of only ITIH4 and AGP to modulate the interaction of NPs with the host immune system, our results suggest that this proof-of-concept could potentially be utilized to reduce the immunogenicity of a wide range of nanomaterials.

BackgroundThe economy of Saudi Arabia is currently undergoing a major transformation which will have an impact on employment in the pharmacy sector. However, quantitative data characterizing the pharmacy workforce in the Kingdom are currently not available. Therefore, the aim of this study was to determine the current status of the licensed pharmacy workforce in the pharmacy field in Saudi Arabia.MethodsDescriptive statistics were performed on data from the Saudi Commission for Health Specialties (SCFHS) as of March 2017.ResultsThe labor market for pharmacists in Saudi Arabia is dominated by expatriates. Saudi nationals constitute less than 20% of the pharmacists employed in the Kingdom. The underemployment of Saudis is most evident in the largest sectors of the pharmacy field, namely, private health care establishments, community pharmacies, and pharmaceutical companies.ConclusionThere is an unmet need to train Saudi citizens as pharmacists and retain them in the workforce. Addressing this issue should become an important objective in Saudi Arabia’s Vision for 2030.

Rapid and accurate classification and discrimination of bacteria is an important task and the recent ongoing COVID-19 pandemic has highlighted that rapid diagnostics that give real-time results is vital. Coupled...

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