Browsing by Author "Kaddoura, Rachid"

Now showing 1 - 5 of 5

Does the Teaching Modality and Exam Proctoring Setting Influence Pre-Clinical Medical Students’ Performance? A Retrospective Cohort Study of Student Performance in Remote Versus Face-to-Face Setting, Dubai, United Arab Emirates
(2023) Kaddoura, Rachid; Alkabbani, Sarah; Inuwa, Ibrahim Muhammad
Objectives: The intent of this study is to compare the academic performance of pre-clinical medical students in online teaching with online proctoring settings versus face-to-face (F2F) teaching with traditional F2F exam proctoring settings. Introduction: In 2019, the world was faced with a rapidly progressive pandemic of COVID-19. Consequently, numerous institutions have opted to transform from the traditional F2F teaching method to an online modality, ensuring the safety of their students and maintaining the effectiveness of their educational programs. In particular, medical universities faced a unique challenge in creating a new learning system due to their atypical curriculum, which often involves hands-on training and is not easily adaptable to remote teaching. Methods: The core of this study is based on the scores of first-year undergraduate medical students across three academic years from the Mohamed Bin Rashid University of Medicine and Health Sciences in Dubai (MBRU), United Arab Emirates (UAE). Course and semester grades were collected and compared in both F2F and online teaching modalities as well as exam settings. Results: Our results show that major courses with high-credit courses had no difference in students’ performance regardless of the teaching modality, and in low-credit courses, students generally did better in the online teaching modality. Regarding exam settings, no significant difference was observed in students’ performance. Conclusion: With few studies examining the variations between F2F and online teaching, the current study in the UAE is the first study comparing academic performance during the COVID-19 era. Our findings illustrate no significant difference between both online and traditional F2F learning. Therefore, given the considerable potential of alternative teaching modalities, future studies are encouraged to explore the efficacy of online learning and proctoring methods.
FAST technique: fast atrial sheath traction technique for device closure of atrial septal defects
(2023) Kaddoura, Rachid
Background: Transcatheter closure of atrial septal defects (ASDs) is wellestablished. However, this procedure can be challenging, requiring multiple attempts and advanced implantation maneuvers. Materials and Methods: From July 2019 to July 2022, patients to whom the fast atrial sheath traction (FAST) technique was applied for ASD device closure were prospectively followed up. The device was rapidly unsheathed in the middle of the left atrium (LA) to let it clamp the ASD from both sides simultaneously. This novel technique was directly applied in patients with absent aortic rims and/or ASD sizeto-body weight ratio higher than 0.9 or after failed attempts of standard implantation. Results: Seventeen patients (64.7% males) were involved with a median age of 9.8 years [interquartile range (IQR), 7.6–15.1] and a median weight of 34 kg (IQR, 22–44). The median ASD size on ultrasound was 19 mm (IQR, 16–22). Five (29.4%) patients had absent aortic rims, and three (17.6%) patients had an ASD size-tobody weight ratio higher than 0.9. The median device size was 22 mm (IQR, 17–24). The median difference between device size and ASD two-dimensional static diameter was 3 mm (IQR, 1–3). All interventions were straightforward without any complications using three different occluder devices. One device was removed before release and upsized to the next size. The median fluoroscopy time was 4.1 min (IQR, 3.6–4.6). All patients were discharged the next postoperative day. On a median follow-up of 13 months (IQR, 8–13), no complications were detected. All patients achieved full clinical recovery with complete shunt closure. Conclusion: We present a new implantation technique to efficiently close simple and complex ASDs. The FAST technique can be of benefit in overcoming left disc malalignment to the septum in defects with absent aortic rims and in avoiding complex implantation maneuvers and the risks of injuring the pulmonary veins.
Identification of Specific Biomarkers and Pathways in the Treatment Response of Infliximab for Inflammatory Bowel Disease: In-Silico Analysis
(2023) Kaddoura, Rachid; Ghelani, Hardik; Alqutami, Fatma; Altaher, Hala; Hachim, Mahmood Yaseen; Jan, Reem Kais
Background: Inflammatory bowel disease (IBD) is characterized by chronic inflammation of the gastrointestinal tract. In biological therapy, infliximab became the first anti-tumor necrosis factor (TNF) agent approved for IBD. Despite this success, infliximab is expensive, often ineffective, and associated with adverse events. Prediction of infliximab resistance would improve overall potential outcomes. Therefore, there is a pressing need to widen the scope of investigating the role of genetics in IBD to their association with therapy response. Methods: In the current study, an in-silico analysis of publicly available IBD patient transcriptomics datasets from Gene Expression Omnibus (GEO) are used to identify subsets of differentially expressed genes (DEGs) involved in the pathogenesis of IBD and may serve as potential biomarkers for Infliximab response. Five datasets were found that met the inclusion criteria. The DEGs for datasets were identified using limma R packages through the GEOR2 tool. The probes’ annotated genes in each dataset intersected with DGEs from all other datasets. Enriched gene Ontology Clustering for the identified genes was performed using Metascape to explore the possible connections or interactions between the genes. Results: 174 DEGs between IBD and healthy controls were found from analyzing two datasets (GSE14580 and GSE73661), indicating a possible role in the pathogenesis of IBD. Of the 174 DEGs, five genes (SELE, TREM1, AQP9, FPR2, and HCAR3) were shared between all five datasets. Moreover, these five genes were identified as downregulated in the infliximab responder group compared to the non-responder group. Conclusions: We hypothesize that alteration in the expression of these genes leads to an impaired response to infliximab in IBD patients. Thus, these genes can serve as potential biomarkers for the early detection of compromised infliximab response in IBD patients.
In Silico Analysis of Publicly Available Transcriptomic Data for the Identification of Triple-Negative Breast Cancer-Specific Biomarkers
(2023) Kaddoura, Rachid; Alqutami, Fatma; Asbaita, Mohamed; Hachim, Mahmood Yaseen
Background: Breast cancer is the most common type of cancer among women and is classified into multiple subtypes. Triple-negative breast cancer (TNBC) is the most aggressive subtype, with high mortality rates and limited treatment options such as chemotherapy and radiation. Due to the heterogeneity and complexity of TNBC, there is a lack of reliable biomarkers that can be used to aid in the early diagnosis and prognosis of TNBC in a non-invasive screening method. Aim: This study aims to use in silico methods to identify potential biomarkers for TNBC screening and diagnosis, as well as potential therapeutic markers. Methods: Publicly available transcriptomic data of breast cancer patients published in the NCBI’s GEO database were used in this analysis. Data were analyzed with the online tool GEO2R to identify differentially expressed genes (DEGs). Genes that were differentially expressed in more than 50% of the datasets were selected for further analysis. Metascape, Kaplan-Meier plotter, cBioPortal, and the online tool TIMER were used for functional pathway analysis to identify the biological role and functional pathways associated with these genes. Breast Cancer Gene-Expression Miner v4.7 was used to validify the obtained results in a larger cohort of datasets. Results: A total of 34 genes were identified as differentially expressed in more than half of the datasets. The DEG GATA3 had the highest degree of regulation, and it plays a role in regulating other genes. The estrogen-dependent pathway was the most enriched pathway, involving four crucial genes, including GATA3. The gene FOXA1 was consistently down-regulated in TNBC in all datasets. Conclusions: The shortlisted 34 DEGs will aid clinicians in diagnosing TNBC more accurately as well as developing targeted therapies to improve patient prognosis. In vitro and in vivo studies are further recommended to validate the results of the current study.
A Rare Case of Sarcoidosis Presenting as an Isolated Breast Mass and Pain: A Case Report and Literature Review
(2023) Kaddoura, Rachid; Al Haj, Maitha; Faraji, Hanan; Abdalbari, Karim
Abstract: Objective: Rare disease Background: Sarcoidosis is a benign systemic granulomatous disorder of unknown etiology that affects multiple organs. Patients diagnosed with sarcoidosis usually present with nonspecific symptoms: fatigue, fever, weight loss, and respiratory symptoms such as cough and dyspnea; 50% of the patients are asymptomatic at the time of diagnosis. In 90% of patients, sarcoidosis targets hilar and mediastinal lymph nodes. In rare cases, it presents solely in the breast with no other symptoms. The diagnosis is established based on compatible clinical and radiological findings and supported by histological evidence in 1 or more organs of non-caseating epithelioid cell granulomas in the absence of organisms or particles. Case Report: We herein present a unique case of a 27-year-old woman who presented with pain and swelling in her left breast. On examination, the left breast revealed multiple, firm-hard, and tender masses. Breast ultrasound showed large loculated focally dilated ducts with significant periductal vascularity and inflammation. Fine-needle aspiration (FNA) showed an inflammatory process with granulomatous formation. An ultrasound-guided core biopsy, which was histologically consistent with granulomatous mastitis, and elevated angiotensin-converting enzyme (ACE) levels confirmed a diagnosis of sarcoidosis. The patient was started on IV steroids followed by oral prednisolone and azathioprine. During treatment, the mass size decreased and the pain substantially improved. Conclusion: It is important to consider sarcoidosis in a patient who presents with only pain and swelling in the breast to ensure early diagnosis and initiate treatment, improving the patient’s overall prognosis.