Phytochemical characterization, anticancer potential, and nanoemulsion-based delivery of <i>Chiliadenus montanus</i>

by Nour Aboalhaija, Hala Abulawi, Rania Hamed, Mohammad Alwahsh, Fatma Afifi, Heba Syaj, Elham Abusharieh, Ismail Abaza

Chiliadenus montanus (Vahl) Boiss. (Asteraceae) is a pharmacologically significant plant with different potent pharmacological properties. This study aimed to evaluate the phytochemical and anticancer activity of C. montanus, and to develop nanoemulsions (NEs) to enhance pulmonary delivery for lung carcinoma treatment. For that ethanol and water extracts, along with petroleum ether, chloroform, ethyl acetate, and methanol fractions, were assessed for total phenol and flavonoid contents, antioxidant activity, and cytotoxicity against H1299 and A549 lung cancer cell lines. The results showed that ethyl acetate fraction exhibited the highest phenol (47.94 ± 0.32 mg GAE/g of DW) and flavonoid (20.34 ± 1.48 mg rutin/g of DW) contents, while the ethanol extract showed the most potent antioxidant activity (IC₅₀ = 322.1 µg/mL) and selective cytotoxicity (IC₅₀ = 641.2 µg/mL) against H1299 cells. Nevadensin, chlorogenic acid, and sorbifolin were identified as the major constituents of the ethanol extract using liquid chromatography-mass spectrometry (LC-MS) analysis. Gas chromatography-mass spectrometry (GC-MS) analysis revealed α-phellandrene, 1,8-cineole, and α-cadinol as the lead volatile constituents. The major volatile compound of the aroma profile of the aerial parts, determined by solid phase micro extraction (SPME) was 1,8-cineole. Spontaneous emulsification was used to formulate ethanolic NE (S1-S4 NEs) with varying concentrations of ethanol extract, surfactant, cosurfactant, and oil phase. The optimal S4 NE demonstrated thermodynamic stability, appropriate pulmonary pH, and droplet sizes below 100 nm. These findings highlight the promising potential of C. montanus NE as a stable pulmonary drug delivery system for lung carcinoma therapy.

A qualitative study on barriers and facilitators of COVID-19 vaccination during pregnancy among pregnant women in Malaysia

by Muhammad Hafiz Mohamed Pauzi, Azidah Abdul Kadir, Rosediani Muhamad, Zainab Mat Yudin

Background

COVID-19 vaccination is crucial for pregnant women to protect against severe complications during pregnancy. However, vaccine hesitancy and refusal can affect acceptance rates among this vulnerable group, posing risks to both maternal and fetal health. This research was conducted to explore the barriers and facilitators influencing COVID-19 vaccination among Malaysian pregnant women.

Methods

This qualitative study adopted a hermeneutic phenomenological design. Nineteen pregnant women receiving antenatal care at three clinics in Kelantan between February 2024 and June 2024 were purposively selected to participate in in-depth interviews. The interviews were audio-recorded, transcribed verbatim, and analyzed using NVivo software alongside manual coding. Thematic analysis, incorporating both inductive and deductive approaches, was conducted to identify key themes.

Results

Most pregnant women expressed hesitancy toward COVID-19 vaccination during pregnancy due to various concerns. Our findings identified four key themes as barriers to vaccination: (i) Fear of side effects, (ii) Negative social influences, (iii) Perception of returning to normalcy, and (iv) Vaccine scepticism and prejudice. Conversely, three themes emerged as facilitators of vaccine acceptance: (i) Concerns about the effects of COVID-19 infection, (ii) Trust in the vaccine, and (iii) Personal and shared vaccination experiences.

Conclusion

This study identified key factors influencing COVID-19 vaccine hesitancy. These findings highlight the importance of addressing both personal and social dimensions of vaccine hesitancy. Public health interventions should focus on building trust, countering misinformation, and leveraging positive community experiences to encourage vaccine uptake, particularly in populations where hesitancy remains a concern.

Presymptomatic microRNA-based biomarker signatures for the prognosis of localized radiation injury in mice

by Lucie Ancel, Jules Gueguen, Guillaume Thoër, Jules Marçais, Aïda Chemloul, Bernard Le Guen, Marc Benderitter, Radia Tamarat, Maâmar Souidi, Mohamed Amine Benadjaoud, Stéphane Flamant

The threat of nuclear or radiological events requires early diagnostic tools for radiation induced health effects. Localized radiation injuries (LRI) are severe outcomes of such events, characterized by a latent presymptomatic phase followed by symptom onset ranging from erythema and edema to ulceration and tissue necrosis. Early diagnosis is crucial for effective triage and adapted treatment, potentially through minimally invasive biomarkers including circulating microRNAs (miRNAs), which have been correlated with tissue injuries and radiation exposure, suggesting their potential in diagnosing LRI. In this study, we sought to identify early miRNA signatures for LRI severity prognosis before clinical symptoms appear. Using a mouse model of hindlimb irradiation at 0, 20, 40, or 80 Gy previously shown to lead to localized injuries of different severities, we performed broad-spectrum plasma miRNA profiling at two latency stages (day 1 and 7 post-irradiation). The identified candidate miRNAs were then challenged using two independent mouse cohorts to refine miRNA signatures. Through sparse partial least square discriminant analysis (sPLS-DA), signatures of 14 and 16 plasma miRNAs segregated animals according to dose groups at day 1 and day 7, respectively. Interestingly, these signatures shared 9 miRNAs, including miR-19a-3p, miR-93-5p, miR-140-3p, previously associated with inflammation, radiation response and tissue damage. In addition, the Bayesian latent variable modeling confirmed significant correlations between these prognostic miRNA signatures and day 14 clinical and functional outcomes from unrelated mice. This study identified plasma miRNA signatures that might be used throughout the latency phase for the prognosis of LRI severity. These results suggest miRNA profiling could be a powerful tool for early LRI diagnosis, thereby improving patient management and treatment outcomes in radiological emergency situations.

Clinical outcomes of a novel single-stage cartilage repair technique using calcified cartilage zone debridement with hyalofast

by Badrul Akmal Hisham Md Yusoff, Muhammad Ikmal Hazli, Norlelawati Mohamad, Muhamad Karbela Reza Ramlan, Nik Kamarul Arif Bin Nik Kamrulzaman, Mohamed Razzan Rameez, Mohamad Azwan Aziz

Introduction

This study aims to determine the clinical outcomes of a new technique of cartilage repair surgery, using calcified cartilage zone debridement coupled with Hyalofast and bone marrow aspirate concentrate, in terms of pain and functional outcomes.

Methods

This was a retrospective case series in 19 patients with cartilage injuries, ICRS 3 and 4. Using arthroscopic examination, cartilage defects were identified and debrided. Then, the calcified cartilage zone was identified and scrapped, until punctate bleeding occurred. Hyalofast was fixed into the defect and bone marrow aspirate concentrate was injected into the Hyalofast. Patients were followed up at baseline, 1, 6, and 18 months post-operative, using visual analog scale, KOOS, IKDC, and Lysholm Score.

Results

The mean age was 45.33 ± 9.68 years, with the mean cartilage defects of 10.21 ± 11.10 X 9.43 ± 10.85 mm². Among the cohort, seven patients (36.8%) underwent three chondral repair procedures, five (26.4%) received two procedures, and the remaining seven (36.8%) were treated with a single procedure. In the KOOS subscale, there was a steady improvement; symptoms (mean difference: −23.87, CI: −43.97 – −3.77, p-value = 0.015), pain (mean difference: −28.39, CI: −43.94 – −12.83, p-value = 0.001), activity of daily living (mean difference: −26.23, CI: −40.95 – −10.14, p-value = 0.001), and sports subscale (mean difference: −57.36, CI: −80.76 – −33.97, p-value  Conclusion

The calcified cartilage zone debridement technique served as a novel technique to preserve subchondral plate allowing better outcomes for cartilage repair.

Shaping the future of medical education: A cross-sectional study on ChatGPT attitude and usage among medical students in Sudan

by Weam Mohamed Meargni Ahmed, Malaz M. Abdalmotalib, Mohamed H. Elbadawi, Galia Tajelsir Fadulelmula Mohammed, Waad Mohamed Ibrahim Mohamed, Fatima Salih Babiker Mohammed, Hajar Saad Salih, Hiba Omer Yousif Mohamed

Background

Artificial intelligence (AI) is revolutionizing education globally, yet its adoption in medical education remains inadequately understood. ChatGPT, a generative AI tool, offers promising yet doubtful potential for enhancing academic and clinical training.

Methods

This study employed an analytical cross-sectional design, involving 1,443 Sudanese medical students who participated through an online, structured questionnaire. The questionnaire was designed to assess ChatGPT awareness, usage, and associated factors. Statistical analysis was performed using SPSS software to identify key determinants influencing ChatGPT awareness and usage among the participants.

Objective

This study investigates the levels of awareness, attitude, and usage of ChatGPT among Sudanese medical students, identifying key socio-demographic, economic, and institutional factors influencing its adoption.

Results

Among the participants, 65.8% were aware of ChatGPT, yet only 41.9% reported using it. Gender differences were statistically significant, with males demonstrating higher usage rates (p 300,000 SDGs) showed significantly greater usage (p  Conclusions

The findings underscore the urgent need for targeted interventions, including curriculum reform to integrate AI literacy, enhanced digital infrastructure, and gender-equity initiatives. Addressing these systemic gaps will scale up AI adoption in medical education. This study provides actionable insights for educators and policymakers, emphasizing the urgency of bridging socio-economic and institutional inequities to foster equitable access to AI tools in medical training.

Burnout syndrome and healthy lifestyle among Egyptian physicians: A cross-sectional study

by Nehal Mohamed Eisa, Mohamed A. M. El-Tabakh, Nourhan M. Kamal, Sara M. Gharbia, Mahmoud M. Samir, Wajid Syed, Mahmood Basil A. Al-Rawi, Ahmed Essam Abou Warda, Abdelrahman S. H. Refaee

Introduction

The phenomenon of burnout and the lifestyle of physicians significantly influence the delivery of healthcare. Over time, burnout intensifies, negatively impacting professional performance, which in turn leads to decreased quality of treatment, patient satisfaction, and productivity. Additionally, it increases the occurrence of medical mistakes and turnover among physicians. In addition to the direct influence of lifestyle on those components.

Aim of the study

The purpose of this study is to assess burnout syndrome among Egyptian physicians, as well as to investigate factors that contribute to burnout, especially demographic characteristics, lifestyle patterns, and health habits.

Methods

A cross-sectional study examined burnout prevalence and determinants among 502 Egyptian physicians in different governorates. An electronic questionnaire was used to collect data for the study. Questionnaire covered socio-demographics, The abbreviated Maslach Burnout Inventory (aMBI), and The Health Lifestyle and Personal Control Questionnaire (HLPCQ).

Results

Younger physicians under 30 showed higher burnout on emotional exhaustion and depersonalization scales, with significant findings (P = 0.047), (P Conclusion

These findings highlight the intricate relationship between burnout and lifestyle among physicians. A healthy lifestyle, including diet, routines, social support, and physical activity was linked to reduced burnout, while dietary harm avoidance was negatively correlated. This suggests opportunities to enhance the well-being of medical professionals through lifestyle interventions.

Determinants and prevalence of metabolic syndrome among the adult population in Hargeisa, Somaliland: A community-based cross-sectional study

by Abdeta Muktar Ahmed, Ayanle Suleiman Ahmed, Mohamed Mussa Abdilahi, Abdulkadir Mohamed Nuh

Background

Metabolic syndrome (met-s) is a medical condition that includes abdominal obesity, hyperlipidemia, high blood glucose, and high blood pressure. It is associated with a high risk of developing cardiovascular diseases and type 2 diabetes mellitus. The condition was believed to be a challenge mostly faced by developed nations. A few studies conducted showed that met-s is increasing and becoming more common in Africa, where it was considered rare. The study aimed to assess the determinants and prevalence of met-s among the adult population in Hargeisa town, Somaliland, in 2023.

Methods

A community-based cross-sectional study among 498 adults living in all eight districts of Hargeisa, was carried out from August to September 2023. The sample size was divided proportionally by the number of households in selected sub-districts. Systematic random sampling was employed to select the households in the sub-districts. One adult from each household was selected and assessed. Data were collected using the STEPwise approach of the World Health Organization. The data were analysed using International Diabetic Federation (IDF) criteria for metabolic syndrome with SPSS version 25. Bivariate and multivariate analyses using logistic regression were performed.

Result

In total, 498 adults participated in the study. The prevalence of met-s was 26.7% in IDF (males 11% vs. females 38.9%). Being of an advanced age of 45–54 years (AOR = 3.6, CI 1.17–11.27), 55–64 years (AOR = 6.1, CI 1.88–19.83), >64 (AOR = 9.1 CI 2.41–34.92), being a woman (AOR = 10.8, CI 5.3–21.8), being overweight or obese (AOR = 4.5, CI 2.5–8), sedentary behavior (AOR = 3.5, CI 1.6–7.5), and lack of physical exercise (AOR = 0.39, CI 0.17–0.88) were significantly associated with met-s.

Conclusion

The met-s was predominant in our findings. Community-based prevention strategies and actions are necessary if the met-s and its potential consequences are needed to be mitigated.

Benzothiazinone analogs as Anti-<i>Mycobacterium tuberculosis</i> DprE1 irreversible inhibitors: Covalent docking, validation, and molecular dynamics simulations

by Mahmoud A. A. Ibrahim, Doaa G. M. Mahmoud, Alaa H. M. Abdelrahman, Khlood A. A. Abdeljawaad, Gamal A. H. Mekhemer, Tamer Shoeib, Mohamed A. El-Tayeb, Peter A. Sidhom, Paul W. Paré, Mohamed-Elamir F. Hegazy

Mycobacterium tuberculosis is a lethal human pathogen, with the key flavoenzyme for catalyzing bacterial cell-wall biosynthesis, decaprenylphosphoryl-D-ribose oxidase (DprE1), considered an Achilles heal for tuberculosis (TB) progression. Inhibition of DprE1 blocks cell wall biosynthesis and is a highly promising antitubercular target. Macozinone (PBTZ169, a benzothiazinone (BTZ) derivative) is an irreversible DprE1 inhibitor that has attracted considerable attention because it exhibits an additive activity when combined with other anti-TB drugs. Herein, 754 BTZ analogs were assembled in a virtual library and evaluated against the DprE1 target using a covalent docking approach. After validation of the employed covalent docking approach, BTZ analogs were screened. Analogs with a docking score less than –9.0 kcal/mol were advanced for molecular dynamics (MD) simulations, followed by binding energy evaluations utilizing the MM-GBSA approach. Three BTZ analogs–namely, PubChem-155-924-621, PubChem-127-032-794, and PubChem-155-923-972– exhibited higher binding affinities against DprE1 compared to PBTZ169 with ΔG_binding values of –77.2, –74.3, and –65.4 kcal/mol, versus –49.8 kcal/mol, respectively. Structural and energetical analyses were performed for the identified analogs against DprE1 throughout the 100 ns MD simulations, and the results demonstrated the great stability of the identified BTZ analogs. Physicochemical and ADMET characteristics indicated the oral bioavailability of the identified BTZ analogs. The obtained in-silico results provide promising anti-TB inhibitors that are worth being subjected to in-vitro and in-vivo investigations.

Current evidence and future direction on evaluating the anticancer effects of curcumin, gingerols, and shogaols in cervical cancer: A systematic review

by Unwaniah Abdull Rahim, Marami Mustapa, Nik Noorul Shakira Mohamed Shakrin, Armania Nurdin, Nursiati Mohamad Taridi, Yasmin Anum Mohd Yusof, Mariam Firdhaus Mad Nordin, Nur Aishah Che Roos

Cervical cancer ranked fourth most common malignancy among women worldwide despite the establishment of vaccination programmes. This systematic review evaluates the anti-cancer properties of turmeric and ginger bioactive compounds, specifically curcumin, 6/10-gingerol, and 6/10-shogaol, and their combination in cervical cancer through in-vitro and in-vivo models. A comprehensive electronic search was performed using Science Direct, PubMed, and Scopus from inception until the second week of June 2024 for studies published in English. Only studies investigating the effects of curcumin, gingerol, shogaol, and/or their combination in human cervical cancer cell lines and/or rodent animal models implanted with cervical cancer xenografts were included. Altogether, 27 studies were included in this review. The evidence gathered indicated that curcumin, 6/10-gingerol and 6-shogaol exert their anticancer action through modulation of cell signalling pathways, including AMPK, WNT, PI3K/AKT, and NF‐κB pathway, and mediators including Bax/Bcl2, TNF‐α, EGFR, COX‐2, caspases‐3, ‐9, p53, and pRb. However, the synergistic effect of these bioactive compounds is not known due to lack of evidence. In conclusion, curcumin, 6/10-gingerols, and 6-shogaols hold promise as therapeutic agents for cervical cancer. Yet, further research is essential to understand their combined efficacy, emphasising the need for additional studies exploring the synergistic anticancer effects of these bioactive compounds. Additional factors to explore include long-term effects and susceptibility of chemoresistant cervical cancer cells towards curcumin, shogaols, and gingerols.

A DFT investigation on the potential of beryllium oxide (Be₁₂O₁₂) as a nanocarrier for nucleobases

by Mahmoud A. A. Ibrahim, Maggie N. S. Hanna, Al-shimaa S. M. Rady, Peter A. Sidhom, Shaban R. M. Sayed, Mohamed A. El-Tayeb, Ahmed M. Awad, Hatem Tallima, Tamer Shoeib

The study of the interactions between biomolecules and nanostructures is quite fascinating. Herein, the adsorption propensity of beryllium oxide (Be₁₂O₁₂) nanocarrier toward nucleobases (NBs) was investigated. In terms of DFT calculations, the adsorption tendency of Be₁₂O₁₂ toward NBs, including cytosine (NB-C), guanine (NB-G), adenine (NB-A), thymine (NB-T), and uracil (NB-U), was unveiled through various configurations. Geometrical, electronic, and energetic features for Be₁₂O₁₂, NBs, and their associated complexes were thoroughly evaluated at M06-2X/6-311+G** level of theory. The potent adsorption process within NBs∙∙∙Be₁₂O₁₂ complexes was noticed through favorable interaction (E_int) and adsorption (E_ads) energies with values up to –53.04 and –38.30 kcal/mol, respectively. Generally, a significant adsorption process was observed for all studied complexes, and the favorability followed the order: NB-C∙∙∙ > NB-G∙∙∙ > NB-A∙∙∙ > NB-T∙∙∙ > NB-U∙∙∙Be₁₂O₁₂ complexes. Out of all studied complexes, the most potent adsorption was found for NB-C∙∙∙Be₁₂O₁₂ complex within configuration A (E_int = –53.04 kcal/mol). In terms of energy decomposition, SAPT analysis revealed electrostatic (E_elst) forces to be dominant within the studied adsorption process with values up to –99.88 kcal/mol. Analyzing QTAIM and NCI, attractive intermolecular interactions within the studied complexes were affirmed. From negative values of thermodynamic parameters, the nature of the considered adsorption process was revealed to be spontaneous and exothermic. Regarding density of state, IR, and Raman analyses, the occurrence of the adsorption process within NBs∙∙∙Be₁₂O₁₂ complexes was confirmed. Noticeable short recovery time values were observed for all studied complexes, confirming the occurrence of the desorption process. The findings provided fundamental insights into the potential application of Be₁₂O₁₂ nanocarrier in drug and gene delivery processes.

CD11c+ dendritic cells PlexinD1 deficiency exacerbates airway hyperresponsiveness, IgE and mucus production in a mouse model of allergic asthma

by Lianyu Shan, Mojdeh Matloubi, Ifeoma Okwor, Sam Kung, Mohamed Sadek Almiski, Sujata Basu, Andrew Halayko, Latifa Koussih, Abdelilah S. Gounni

Dendritic cells (DCs) are pivotal in regulating allergic asthma. Our research has shown that the absence of Sema3E worsens asthma symptoms in acute and chronic asthma models. However, the specific role of PlexinD1 in these processes, particularly in DCs, remains unclear. This study investigates the role of PlexinD1 in CD11c+ DCs using a house dust mite (HDM) model of asthma. We generated CD11c+ DC-specific PlexinD1 knockout (CD11c^{PLXND1 KO}) mice and subjected them, alongside wild-type controls (PLXND1^fl/fl), to an HDM allergen protocol. Airway hyperresponsiveness (AHR) was measured using FlexiVent, and immune cell populations were analyzed via flow cytometry. Cytokine levels and immunoglobulin concentrations were assessed using mesoscale and ELISA, while collagen deposition and mucus production were examined through Sirius-red and periodic acid Schiff (PAS) staining respectively. Our results indicate that CD11c^{PLXND1 KO} mice exhibit significantly exacerbated AHR, characterized by increased airway resistance and tissue elastance. Enhanced mucus production and collagen gene expression were observed in these mice compared to wild-type counterparts. Flow cytometry revealed higher CD11c+ MHCII^high CD11b+ cell recruitment into the lungs, and elevated total and HDM-specific serum IgE levels in CD11c^{PLXND1 KO} mice. Mechanistically, co-cultures of B cells with DCs from CD11c^{PLXND1 KO} mice showed significantly increased IgE production compared to wild-type mice.These findings highlight the critical regulatory role of the plexinD1 signaling pathway in CD11c+ DCs in modulating asthma features.