Publications by authors named "Matar R"

This retrospective cohort study aimed to define the optimal Regions of Homozygosity (ROH) size cut-offs for prediction of morbidity, based on 13 483 Chromosomal Microarray Analyses (CMA). Receiver operating characteristic (ROC) curves were generated, and area under the curve (AUC) was used to assess the predictive capability of total ROH percentage (TRPS), ROH number and ROH segment size in distinguishing between healthy (n=6,196) and affected (n=6,839) cohorts. The metrics were examined for telomeric and interstitial segments, distinct TRPS categories, and across different ancestral origins.

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This study investigates distal 2q13 microdeletion, presenting the largest cohort to date, including prenatal cases, alongside a comprehensive literature review. A retrospective analysis was conducted on distal 2q13 microdeletions from clinical charts and laboratory reports. The cohort was divided into "clinically indicated" and "not-clinically indicated" groups based on the reason for chromosomal microarray testing.

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This article presents an overview of endoscopic bariatric and metabolic therapies (EBMTs) as emerging minimally invasive interventions for obesity and its related comorbidities. It explores various gastric and small-bowel endoscopic procedures, including their mechanisms, clinical outcomes, and safety profiles.

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Article Synopsis
  • IgA vasculitis (IgAV) is a pediatric disease characterized by skin and systemic symptoms, and researchers conducted comprehensive studies involving genome, transcriptome, and proteome analyses on a large cohort of IgAV patients and controls to better understand the disease mechanisms.* -
  • Significant associations were found with specific genetic risk factors, including two novel non-HLA loci linked to IgA receptor functioning, which may contribute to disease development through altered immune responses.* -
  • Systems biology approaches helped identify key regulatory networks and master regulators in myeloid cells, along with 21 genetic loci that overlap with IgA nephropathy, suggesting shared pathways in these related conditions.*
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Aim: Dental caries is a prevalent chronic disease affecting children worldwide. This study aimed to investigate the association between dental caries and salivary levels of vitamin D and vitamin C in children.

Materials And Methods: This cross-sectional research was conducted at RAK College of Medical Sciences, RAK Medical and Health Sciences University, Ras Al Khaimah, United Arab Emirates, in children between the ages of 4 and 12 years, with a sample of 60 children divided into study and control groups based on the presence or absence of dental caries.

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Various strategies have been employed to improve the reliability of 2D, 3D, and co-culture in vitro models of nonalcoholic fatty liver disease, including using extracellular matrix proteins such as collagen I to promote cell adhesion. While studies have demonstrated the significant benefits of culturing cells on collagen I, its effects on the HepG2 cell line after exposure to palmitate (PA) have not been investigated. Therefore, this study aimed to assess the effects of PA-induced lipotoxicity in HepG2 cultured in the absence or presence of collagen I.

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Background: Similarly to wild poliovirus, vaccine-derived poliovirus (VDPV) strains can cause acute flaccid paralysis, posing a considerable challenge to public health and the eradication of poliovirus. VDPV outbreaks, particularly VDPV type 2 (VDPV2), are increasing worldwide, including in high-income countries with high vaccine coverage. We aimed to conduct a comprehensive analysis of the molecular epidemiology of a widespread VDPV2 outbreak in Israel in 2022-23 using conventional polio identification techniques and whole-genome sequencing.

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Regions of Homozygosity (ROH) typically reflect normal demographic history of a human population, but may also relate to cryptic consanguinity, and, additionally, have been associated with specific medical conditions. The objective of this study was to investigate the location, size, and prevalence of common ROH segments in a Middle Eastern cohort. This retrospective study included 13 483 samples collected from all Chromosomal Microarray analyses (CMA) performed using Single Nucleotide Polymorphism (SNP) arrays at the genetic clinical laboratory of Rabin Medical Center between 2017-2023 (primary data set).

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Long contiguous stretches of homozygosity or regions of homozygosity (ROH) are frequently detected via microarray and sequencing technologies. However, consensus on the establishment of specific size cutoffs for reporting ROH remains elusive. This study aims to assess the Total ROH Percentages (TRPS) and size of ROH segments across different ethnic origins, exploring potential disparities and proposing tailored diagnostic thresholds.

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The gallbladder (GB) is a susceptible organ, prone to various pathologies that can be identified using different imaging techniques. Transabdominal ultrasound (TUS) is typically the initial diagnostic method due to its numerous well-established advantages. However, in cases of uncertainty or when a definitive diagnosis cannot be established, computed tomography (CT) or magnetic resonance imaging may be employed to provide more detailed information.

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This work aimed to evaluate the neuroprotective effects of zinc oxide (ZnO) nanoparticles in an experimental mouse model of rotenone-induced PD and investigate the therapeutic effects of ZnO, cobalt ferrite nanoparticles, and their combination. The levels of dopamine, norepinephrine, epinephrine, and serotonin were assessed using ELISA in the control and experimental model of PD mice. The dopa-decarboxylase expression level was assayed by real-time PCR.

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Article Synopsis
  • The study reviews complications associated with bridge plating for distal radius fractures, noting higher rates than previously documented in the literature.
  • Out of 65 patients, 32% experienced major complications requiring further surgery, including infections and nonunion, along with limited recovery in grip strength and joint movement.
  • The findings suggest a need for improved plate design to prevent breakage and emphasize the importance of assessing carpal tunnel syndrome during initial evaluations.
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Objective:  This study aimed to determine the diagnostic yield of chromosomal microarray analysis (CMA) performed in cases of fetal abnormalities detected during the third trimester of pregnancy.

Study Design:  A retrospective review of medical records was conducted for women who underwent amniocentesis at or beyond 28 weeks of gestation between January 2017 and February 2023. CMA results of pregnancies with abnormal sonographic findings not detected before 28 weeks were included.

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Objective: Single-nucleotide variants (SNVs) are of great significance in prenatal diagnosis as they are the leading cause of inherited single-gene disorders (SGDs). Identifying SNVs in a non-invasive prenatal screening (NIPS) scenario is particularly challenging for maternally inherited SNVs. We present an improved method to predict inherited SNVs from maternal or paternal origin in a genome-wide manner.

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  • POT1 is an important gene involved in protecting and regulating the length of telomeres, and mutations in this gene can increase cancer risk, particularly for melanoma and chronic lymphocytic leukemia (CLL).
  • A specific mutation, p.(I78T), has been identified as a common pathogenic variant among Ashkenazi Jews, linked to a range of cancers and recurrent melanoma in individuals aged 25 to 67.
  • Research suggests that this variant should be included in genetic testing for high-risk patients of Ashkenazi Jewish descent due to its association with early-onset severe cancers.
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Introduction: Microcephaly, characterized by abnormal head growth, can often serve as an initial indicator of congenital, genetic, or acquired disorders. In this study, we sought to evaluate the effectiveness of chromosomal microarray (CMA) testing in detecting abnormalities in both prenatal and postnatal cases of microcephaly.

Materials And Methods: CMA Testing: We conducted CMA testing on 87 prenatally-detected microcephaly cases and 742 postnatal cases at a single laboratory.

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  • Chronic liver diseases, particularly dysfunction-associated steatotic liver disease (MASLD), are a significant public health issue worldwide, prompting this study focused on the Lebanese population.
  • The research involved 120 participants aged 20-70 and revealed strong links between MASLD and factors like obesity, hypertension, diabetes, and dietary habits, highlighting a trend of higher sugary beverage consumption among affected individuals.
  • The findings emphasized the importance of understanding health behaviors and dietary patterns in relation to liver diseases, suggesting that further research should explore these issues in more diverse populations.
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Background: Population genetic carrier screening (PGCS) for cystic fibrosis (CF) has been offered to couples in Israel since 1999 and was included in a fully subsidized national program in 2008. We evaluated the impact of PGCS on CF incidence, genetic and clinical features.

Methods: This was a retrospective national study.

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Background: This study aimed to investigate the prevalence of acute kidney injury (AKI) in infants with varying degrees of hypoxic-ischemic encephalopathy (HIE) and its associated outcomes, including mortality and length of stay (LOS).

Methods: The study used the National Inpatient Sample (NIS) dataset from 2010 to 2018. Regression analysis was used to control confounding variables.

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Background: The rate of clinically significant copy number variants in chromosomal microarray analysis in low-risk pregnancies is approximately 1%. However, these results include copy number variants with low and variable penetrance, although some patients might be interested only in the detection of high-penetrant variants.

Objective: This study aimed to calculate the prevalence of high-penetrant copy number variants in a large cohort of low-risk pregnancies.

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Background: Lung transplantation is recommended for select patients with end-stage chronic obstructive pulmonary disease (COPD). However, a consensus has not been reached regarding the optimal choice of lung transplantation: single lung transplants (SLTs) vs bilateral lung transplants (BLTs). This meta-analysis aimed to evaluate the safety and efficacy of SLT compared with BLT in managing end-stage COPD.

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Deep brain stimulation (DBS) is extensively used to treat motor and non-motor symptoms in Parkinson's disease (PD). The aim of this study was to investigate the difference between subthalamic (STN) and globus pallidus internus (GPi) DBS on mood and quality of life with reference to minimal clinically important differences (MCID). A systematic literature search for articles published until November 2022 yielded 14 studies meeting the eligibility criteria, with a total of 1,088 patients undergoing STN (n=571) or GPi (n=517) stimulation.

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