Development, optimization and evaluation of solid lipid nanoparticles of Celecoxib.

BACKGROUND: As indicated by the biopharmaceutical classification system, Celecoxib is a class II moiety. Many endeavors have been made to improve its solubility and consequently its dissolution rate, thus enhancing its overall bioavailability. In the present investigation, the nano-lipid technology was exploited to control the release of celecoxib (CXB) to overcome its dissolution problem. Solid lipid nanoparticles (SLNs) have a small particle size (50-1000 nm) that results in a large surface area-to-volume ratio, which further enhances the contact between the drug and the dissolution medium. This leads to improved drug release and absorption. Moreover, SLNs can solubilize hydrophobic drugs within the lipid matrix, increasing their effective solubility and facilitating their dissolution in an aqueous environment. AIM AND OBJECTIVE: The objective of the study was to enhance the solubility and bioavailability of a BCS Class-II drug-celecoxib formulating it as solid lipid nanoparticles. In order to overcome all its limitations, solid lipid nanoparticles of Celecoxib were developed, optimized, and evaluated for in-vitro and in-vivo parameters. METHODS: The CXB loaded-SLNs were prepared by solvent emulsification-diffusion technique. SLN was characterized using Fourier transform infra spectroscopy (FTIR) and evaluated for entrapment efficiency, drug loading, particle size, Polydispersity index (PDI), zeta potential, In-vitro release studies as well as in- vivoanti-inflammatory studies using rat paw edema method. The SLN formulations were optimized by central composite design (Design Expert 11- trial version). RESULTS: On the basis of outcomes of CCD the optimized formulation OF1 was selected as a desirable formulation. Its particle size, PDI, and zeta potential were found to be 314 nm, 0.204, and -18.73 respectively. It exhibited high entrapment efficiency (79±0.18 %) and drug loading (44.38±0.21 %). In-vitro release studies of the optimized formulation displayed the Korsemeyer-Peppas model with a maximum drug release of 89.42 ±0.12 % in 24 h. In-vivo studies also revealed that OF1 formulation reduced the rat paw volume to a minimum (1±0.32) in 24 h when compared to pure API (2±0.62) and marketed preparation (2±0.42). CONCLUSION: The results revealed that in-vitro release studies of optimized formulation exhibited a sustained drug release delivery. In-vivo anti-inflammatory studies proved that the CXB-loaded SLNs enhance the oral bioavailability more than pure API.

Identifying monkeypox: do dental professionals have adequate knowledge and awareness?

Background: The emergence of monkeypox has presented a new challenge for health agencies around the globe. There is significant increase in the number of cases that too in non-endemic countries with more than 18000 cases reported worldwide. Objective: The present study was conducted to assess knowledge and awareness regarding monkeypox among dental professionals. Materials and Method: The present cross-sectional study among 410 subjects who were residing in a northern state of the country. Informed consent was obtained from all the subjects. Study sample was selected on the basis of Systematic random sampling methodology. A self-designed close-ended questionnaire written in English and verified by experts was utilized for the study. The questionnaire was delivered personally to study subjects to collect the required information. Chi-square test and ANOVA were used for statistical analysis. Results: One-fourth (24.8%) of the subjects never heard about monkeypox disease. Negative response was given by 44.8% of subjects regarding resemblance of monkeypox with small pox. Only 31.2% of subjects had knowledge regarding oral manifestations of the disease. High knowledge scores were reported by only 28% of subjects. Higher knowledge levels were significantly related to education level and working profile of study subjects. Online media (Internet) was preferred as the main source to obtain more information by 42.2 of subjects. Conclusion: There was low level of knowledge regarding monkeypox among study subjects. There is an urgent need for dental professionals to keep themselves updated with recent knowledge on new emerging infectious diseases.

Dermatological Manifestations of Parkinson's Disease: Clues for Diagnosis.

Background and objective Parkinson's disease (PD) is a common neurodegenerative disorder. There are various manifestations of PD. Among them, motor dysfunction has been studied in many research studies; however, few studies are available related to the dermatological manifestations of PD. This study was conducted with the aim to shed light on various skin conditions that occur in PD. Methods This cross-sectional study was conducted at a tertiary care hospital in Pakistan for a period of nine months; 107 patients with PD were included after obtaining informed consent. A self-administrated questionnaire was used to record demographic data and dermatological findings. Results Among the various dermatological manifestations, patients with PD most commonly presented with seborrheic dermatitis (46.7%) and rosacea (10.2%). Other manifestations included bullous pemphigoid (7.4%) and melanoma (4.6%). Conclusion The study revealed several dermatological manifestations of PD, which usually get overlooked by neurologists. Through this study, we want to emphasize that PD, apart from all the motor signs and symptoms, can also present as skin problems, and hence, a multi-disciplinary approach should be taken while managing PD.

Barriers Experienced by Medical Students in Conducting Research at Undergraduate Level.

Introduction Undergraduate medical research is very important not only for scientific learning but also for career progress. However, there are barriers, especially in developing countries, that restrict undergraduate research. This study aims to evaluate the barriers experienced by medical students in conducting research at undergraduate level. Methods It was an observational, cross-sectional survey conducted with 687 clinical students of two public medical universities of Pakistan. A self-structured questionnaire consisting of seven items was administered to assess the barriers in conducting research at undergraduate level. Data was processed and analysed through SPSS v 22.0 (IBM Corp., Armonk, NY, USA). Results Lack of knowledge as a barrier was identified by 90.68% (n = 623) students. The second most common barrier identified by the students was lack of time (88.79%; n = 610), followed by lack of mentoring as the third most common barrier (85.74%; n = 572). Sub-group analysis showed that lack of knowledge, lack of mentoring, limited data base access, lack of time, and lack of finances were more crucial barriers for female gender (p < 0.05). Only lack of interest was a crucial barrier for male gender (p < 0.05). Conclusion A number of barriers need to be addressed in order to enhance students' participation in clinical research such as lack of interest, funding, and poor availability of research mentors and access to scientific databases to improve participation in clinical research. Substantial amendments in the medical undergraduate curriculum are needed.

Depression, Anxiety, and Stress Among Final-year Medical Students.

Introduction The overall environment of the medical school is often considered very stressful. It projects negative effects not only on the academic performances of medical students but also deteriorate their physical health and psychosocial wellbeing. The aim of this study was to determine the frequency of depression, stress, and anxiety among final year medical students. Methods This observational study was conducted in public and private medical colleges in February 2019. The instrument utilized in this study was Depression, Anxiety, and Stress Scale (DASS-21). Factors predisposing to depression, stress, and anxiety were also recorded. Data were entered and analyzed using SPSS v. 21. Results The mean scores of depression, anxiety, and stress were 18.00 ± 11.5, 19.15 ± 11.2, and 20.92 ± 11.2, respectively. The mean score of anxiety and stress was higher in private college students, while that of depression was higher in public college students. Overall, 57.6% of the students suffered from moderate to extremely severe depression, 74% of the students suffered from moderate to extremely severe anxiety, and 57.7% students had moderate to extremely severe stress. The common reasons to high stress and anxiety included the pressure of passing exams, the pressure of living up to family's expectations, fear of stepping into the real world of medicine, and dissatisfaction with the administration. Conclusion The incidence of psychological illnesses including anxiety, stress, and depression is high among the medical students of Pakistan. Reasons predisposing the students to these illnesses must be efficiently tackled.