METHODS: Herein, we have engineered antibiotic-loaded (doxycycline or vancomycin) LPHNPs with cationic and zwitterionic lipids and examined the effects on their physicochemical characteristics (size and charge), antibiotic entrapment efficiency, and the in vitro intracellular bacterial killing efficiency against Mycobacterium smegmatis or Staphylococcus aureus infected macrophages.
RESULTS: The incorporation of cationic or zwitterionic lipids in the LPHNP formulation resulted in a size reduction in LPHNPs formulations and shifted the surface charge of bare NPs towards positive or neutral values. Also observed were influences on the drug incorporation efficiency and modulation of the drug release from the biodegradable polymeric core. The therapeutic efficacy of LPHNPs loaded with vancomycin was improved as its minimum inhibitory concentration (MIC) (2 µg/mL) versus free vancomycin (4 µg/mL). Importantly, our results show a direct relationship between the cationic surface nature of LPHNPs and its intracellular bacterial killing efficiency as the cationic doxycycline or vancomycin loaded LPHNPs reduced 4 or 3 log CFU respectively versus the untreated controls.
CONCLUSION: In our study, modulation of surface charge in the nanomaterial formulation increased macrophage uptake and intracellular bacterial killing efficiency of LPHNPs loaded with antibiotics, suggesting alternate way for optimizing their use in biomedical applications.
METHOD: This cross-sectional study was conducted in 14 Perak state hospitals and 12 primary health clinics through an online survey. All ward pharmacists and trainee pharmacists with at least 1 month of ward pharmacy experience and working in government-funded health facilities were included. The validated survey tool consisted of demographic characteristics, pharmacists' experience towards challenges (22 items), and their attitude towards adaptive measures (9 items). Each item was measured based on a 5-point Likert scale. One-way ANOVA and logistic regression were employed to determine the association of pharmacists' characteristics against their experience and attitude.
RESULTS: Out of 175 respondents, 144 (81.8%) were female, and 84 (47.7%) were Chinese. Most pharmacists served in the medical ward (124, 70.5%). Commonly reported perceived challenges were difficulties in counselling medication devices (3.63 ± 1.06), difficulties in clerking medication history from family members (3.63 ± 0.99), contacting family members (3.46 ± 0.90), patient's digital illiteracy in virtual counselling (3.43 ± 1.11) and completeness of the electronic records (3.36 ± 0.99). For attitude towards adaptive measures, improving internet connection (4.62 ± 0.58), ensuring availability of multilingual counselling videos (4.45 ± 0.64), and provision of internet-enabled mobile devices (4.39 ± 0.76) were the most agreeable by the pharmacists. Male (AOR: 2.63, CI 1.12-6.16, p = 0.026) and master's degree holders (AOR: 2.79, CI 0.95-8.25, p = 0.063) had greater odds of high perceived challenging experience scores. Master's degree holders (AOR: 8.56, CI 1.741-42.069, p = 0.008) were also more likely to have a positive attitude score towards adaptive measures.
CONCLUSION: Pharmacists faced multiple challenges in the ward pharmacy practice during the COVID-19 pandemic, especially in medication history assessment and patient counselling. Pharmacists, especially those with higher levels of education and longer tenure, exhibited a higher level of agreement towards the adaptive measures. The positive attitudes of pharmacists towards various adaptive measures, such as improvement of internet infrastructure and digital health literacy among patients and family members, warrant immediate action plans from health authorities.
METHODS: A literature review of PubMed with a focus on historical and landmark studies was undertaken to classify the evidence according to the different stages of the IDEAL Framework.
RESULTS: Several different transoral approaches were developed by a small of number of surgeon-innovators on animals and cadavers, and subsequently in first-in-human studies. The trivestibular approach emerged as the safest technique, with further refinements of this technique culminating in TOETVA. The basic steps and indications for this technique have been standardized and it is now being replicated by early adopters in many centres worldwide. The development of TOETVA has closely aligned with the IDEAL Framework, and is currently at stage 2B (Exploration).
CONCLUSION: There is need for multi-institutional collaborations and international registry studies to plan high-quality randomized trials comparing TOETVA with other remote-access approaches and collect long-term follow-up data. In countries where TOETVA has yet to be adopted, the IDEAL Framework will be a useful roadmap for government regulators and professional societies to evaluate, regulate, and provide best practice recommendations for the adoption of this technique.