ABSTRACT
The global prevalence of Helicobacter pylori (H. pylori) is estimated to be around 4.4 billion, with the majority of individuals affected in developing countries. Chronic infection of the gram-negative bacterium results in several gastrointestinal pathologies such as chronic gastritis, peptic ulcer, and cancer. Probiotics compete directly with H. pylori and help restore the gut microbial environment; these living microorganisms are comparatively more effective than the standard triple antibiotic regimen in the management of symptoms related to the pathogenic bacteria. The need for alternative therapy is better explained by the increasing rate of antibiotic resistance and the lowering of patient compliance to the standard treatment. Adjuvant administration of probiotics to H. pylori eradication therapy is associated with a higher H. pylori eradication rate, decreased diarrhea-related treatment, less common self-reported side effects, and higher treatment compliance. Therefore, with the ongoing and future resistance to antibiotics, this systematic review aims to investigate the use and efficacy of probiotics when used alone or in conjunction with the current guideline treatment. A literature search was conducted using Pubmed, MEDLINE, and Cochrane for peer-reviewed articles published between January 1, 2016 and April 2022. MeSH terms used were: "H. pylori," "H. pylori and probiotics," "Probiotics," "H. pylori treatment," "Mechanism of Action" with subheadings as "clinical manifestations," "treatment," and "diagnosis." All literature reviews, original papers, and case reports were included. This search strategy aimed to find literature that could describe the transmission and mechanism of action of H. pylori, the current treatment guidelines, and the efficacy of probiotics in eradicating H. pylori.
ABSTRACT
BACKGROUND: The average number of clerkship weeks required for the pediatric core rotation by the US medical schools is significantly lower than those required for internal medicine or general surgery. OBJECTIVE: The objective behind conducting this survey study was to explore the perceptions and expectations of medical students and pediatric physicians about the third-year pediatric clerkship. METHODS: An anonymous survey questionnaire was distributed to all general pediatric physicians at Hamad Medical Corporation and to students from Weill Cornell Medical College-Qatar. RESULTS: Feedback was obtained from seven attending pediatricians (100% response rate), eight academic pediatric fellow physicians (100% response rate), 36 pediatric resident physicians (60% response rate), and 36 medical students (60% response rate). Qualitative and quantitative data values were expressed as frequencies along with percentages and mean ± standard deviation and median and range. A P-value <0.05 from a 2-tailed t-test was considered to be statistically significant. Participants from both sides agreed that medical students receive <4 hours per week of teaching, clinical rounds is the best environment for teaching, adequate bedside is provided, and that there is no adequate time for both groups to get acquainted to each other. On the other hand, respondents disagreed on the following topics: almost two-thirds of medical students perceive postgraduate year 1 and 2 pediatric residents as the best teachers, compared to 29.4% of physicians; 3 weeks of inpatient pediatric clerkship is enough for learning; the inpatient pediatric environment is safe and friendly; adequate feedback is provided by physicians to students; medical students have accessibility to physicians; students are encouraged to practice evidence-based medicine; and students get adequate exposure to multi-professional teams. CONCLUSION: Assigning devoted physicians for education, providing proper job description or definition of the roles of medical student and physician in the pediatric team, providing more consistent feedback, and extending the duration of the pediatric clerkship can diminish the gap of perceptions and expectations between pediatric physicians and medical students.
ABSTRACT
Duchenne Muscular Dystrophy (DMD) is a common, inherited, incurable, fatal muscle wasting disease caused by deletions that disrupt the reading frame of the DMD gene such that no functional dystrophin protein is produced. Antisense oligonucleotide (AO)-directed exon skipping restores the reading frame of the DMD gene, and truncated, yet functional dystrophin protein is expressed. The aim of this study was to assess the efficiency of two novel rigid, cationic carotenoid lipids, C30-20 and C20-20, in the delivery of a phosphorodiamidate morpholino (PMO) AO, specifically designed for the targeted skipping of exon 45 of DMD mRNA in normal human skeletal muscle primary cells (hSkMCs). The cationic carotenoid lipid/PMO-AO lipoplexes yielded significant exon 45 skipping relative to a known commercial lipid, 1,2-dimyristoyl-sn-glycero-3-ethylphosphocholine (EPC).
