Publications by authors named "Bellal Jubran"

4 Publications

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Suboptimal Vaccination Administration in Mothers With Inflammatory Bowel Disease and Their Biologic-Exposed Infants.

Inflamm Bowel Dis 2021 Feb 20. Epub 2021 Feb 20.

Department of Community Health Sciences, University of Calgary, Alberta, Canada.

Background: Pregnant women with inflammatory bowel disease (IBD) are at increased risk of developing complications from vaccine-preventable infections. We investigated the factors influencing vaccine administration in pregnant women with IBD and their infants, in addition to the safety of vaccination in the infants.

Methods: This retrospective cohort study identified individuals from a tertiary referral clinic whose records were linked to a provincial vaccine database. We conducted χ 2 tests, Fisher exact tests, and logistic regression adjusting for age and disease duration to compare vaccine administration by medication class. Potential rotavirus vaccine adverse events were determined in infants of women with IBD.

Results: We included 303 pregnant women and 262 infants. Vaccines were administered to women on biologic therapy as follows: hepatitis B virus (82.9%), diphtheria-tetanus-pertussis (82.1%), and hepatitis A virus (49.3%). The influenza vaccination was provided peripartum in 50.7% of patients. The measles-mumps-rubella-varicella vaccine was provided to 89.3% of women before biologic initiation. Women treated with a biologic (adjusted odds ratio, 2.50; 95% confidence interval, 1.39-4.35) or immunomodulator (adjusted odds ratio, 4.00; 95% confidence interval, 2.22-7.69) were more likely to receive the Prevnar 13 and Pneumovax 23 vaccines than were unexposed individuals, but the overall proportion vaccinated was low (Prevnar 13, 35.7%; Pneumovax 23, 39.3%). At least 90% of infants received the measles-mumps-rubella-varicella vaccine and inactivated vaccines. Fourteen biologic-exposed children (19.2%) received the live rotavirus vaccine with no significant differences in adverse events compared with biologic-unexposed infants (7.1% vs 8.2%, P = 0.99).

Conclusions: Better education surrounding vaccine recommendations is required for both health care providers and individuals with IBD given poor pneumococcal, hepatitis A virus, and influenza vaccination rates. Inadvertent administration of the rotavirus vaccine in biologic-exposed infants did not result in more adverse events, raising the possibility of safety.
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February 2021

Off-label use of aprepitant for scleroderma-associated nausea and vomiting: A case report.

J Clin Pharm Ther 2019 Oct 22;44(5):805-808. Epub 2019 May 22.

General Internal Medicine at the University of Calgary, Calgary, Alberta, Canada.

What Is Known And Objective: Scleroderma is a disease characterized by excessive deposition of collagen and extracellular matrix proteins in affected organ systems, which results in tissue fibrosis and organ dysfunction. It is estimated that 90% of patients with systemic sclerosis have gastrointestinal involvement, with approximately 50% being symptomatic. Clinical manifestations of gastrointestinal scleroderma manifestations relate to impaired motility and absorption and ultimately malnutrition. Treatments for these symptoms often fail and are limited. The objective of this case report is to highlight the potential use of a substance P antagonist in the treatment of scleroderma associated nausea.

Case Summary: A 56-year-old woman presented with GI complications of her underlying systemic sclerosis. The majority of her stay was marked by severe nausea and vomiting, resistant to numerous therapies. Obstructive causes for her symptoms were ruled out with a gastroscopy. A motility study revealed completely absent peristalsis in her esophagus, likely due to complete fibrosis of smooth muscle fibres. For the first time, off-label use of aprepitant 80 mg once daily was trialed with success in hospital. With this medication, she was able to maintain an adequate oral intake and ultimately achieve discharge from hospital.

What Is New And Conclusion: Despite the wide array of medications for gastrointestinal scleroderma, their effect is very limited. In this article, we report to the best of our knowledge the first successful use of the substance P antagonist aprepitant to treat refractory nausea and vomiting in a patient with gastrointestinal scleroderma. Not only does this medication carry promise in treating the GI symptoms of scleroderma, but it may also prove cost effective as compared to PEG insertions or TPN. This case study is congruent with recent evidence of the utility of aprepitant in other infiltrative disease conditions. This may spur interest randomized control trials for expanding the role of this medication.
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October 2019

Reevaluating Canada's policy for blood donations from men who have sex with men (MSM).

J Public Health Policy 2016 Dec;37(4):428-439

Research Institute of the McGill University Health Centre, Montreal, QC, Canada.

During the HIV/AIDS epidemic of the 1980s, most of the developed world instituted a permanent ban on blood donations from men who have sex with men (MSM). In recent years, public health agencies across Europe and North America are reconsidering and rescinding these restrictions. We examine the Canadian climate, where MSM may donate blood only after a 5-year deferral period. We review circumstances of the initial ban on MSM blood donations and recent social, legal, and economic changes that have encouraged Canadian public health officials to consider policy reform. We also review international evidence about the impact of reforming MSM blood donations. Given improvements in HIV screening technology, results from mathematical modeling studies, and empirical data from Italy, the UK, and Australia, we conclude that changing Canada's MSM blood donation policy from a 5- to a 1-year deferral would not increase the number of transfusion-transmitted HIV infections. We provide empirical support to the recently elected Liberal Canadian government's political promise to decrease restrictions on MSM blood donations.
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December 2016

A Comprehensive Membrane Interactome Mapping of Sho1p Reveals Fps1p as a Novel Key Player in the Regulation of the HOG Pathway in S. cerevisiae.

J Mol Biol 2015 Jun 30;427(11):2088-103. Epub 2015 Jan 30.

Donnelly Centre, University of Toronto, 160 College Street, Toronto, ON M5S 3E1, Canada; Department of Biochemistry, University of Toronto, Medical Science Building, 1 King's College Circle, Toronto, ON M5S 1A8, Canada; Department of Molecular Genetics, University of Toronto, Medical Sciences Building, 1 King's College Circle, Toronto, ON M5S 1A8, Canada. Electronic address:

Sho1p, an integral membrane protein, plays a vital role in the high-osmolarity glycerol (HOG) mitogen-activated protein kinase pathway in the yeast Saccharomyces cerevisiae. Activated under conditions of high osmotic stress, it interacts with other HOG pathway proteins to mediate cell signaling events, ensuring that yeast cells can adapt and remain viable. In an attempt to further understand how the function of Sho1p is regulated through its protein-protein interactions (PPIs), we identified 49 unique Sho1p PPIs through the use of membrane yeast two-hybrid (MYTH), an assay specifically suited to identify PPIs of full-length integral membrane proteins in their native membrane environment. Secondary validation by literature search, or two complementary PPI assays, confirmed 80% of these interactions, resulting in a high-quality Sho1p interactome. This set of putative PPIs included both previously characterized interactors, along with a large subset of interactors that have not been previously identified as binding to Sho1p. The SH3 domain of Sho1p was found to be important for binding to many of these interactors. One particular novel interactor of interest is the glycerol transporter Fps1p, which was shown to require the SH3 domain of Sho1p for binding via its N-terminal soluble regulatory domain. Furthermore, we found that Fps1p is involved in the positive regulation of Sho1p function and plays a role in the phosphorylation of the downstream kinase Hog1p. This study represents the largest membrane interactome analysis of Sho1p to date and complements past studies on the HOG pathway by increasing our understanding of Sho1p regulation.
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June 2015