Publications by authors named "Mohamed Elrefaei"

Article Synopsis
  • The COVID-19 pandemic has negatively affected lung transplant recipients (LTR), raising concerns about the risk of developing de-novo HLA donor-specific antibodies (DSA) after infection, particularly with changes in immunosuppressive treatment.
  • A study reviewed 63 LTR diagnosed with COVID-19, categorizing disease severity into mild, moderate, and severe to analyze the impact on HLA DSA production.
  • Results indicated no significant changes in antibody levels or de-novo DSA occurrence for most patients over a six-month period post-COVID-19 diagnosis, although a small percentage of those with severe COVID-19 did show new DSA development.
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Importance: Heart failure (HF) hospitalization is a common end point in HF trials; however, how HF hospitalization is associated with all-cause hospitalization in terms of proportionality, correlation of treatment effects, and concomitant reporting has not been studied.

Objective: To determine the ratio of HF to all-cause hospitalizations, whether reported treatment effects on HF hospitalization are associated with treatment effects on all-cause hospitalization, and how often all-cause hospitalization is reported alongside HF hospitalization.

Data Sources: PubMed was searched from inception to September 2, 2024, for randomized clinical trials (RCTs) of HF treatments using MeSH (medical subject heading) terms and keywords associated with heart failure, ventricular failure, ventricular dysfunction, and cardiac failure, as well as the names of specific journals.

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Article Synopsis
  • The study investigates the effects of a specific extract on liver toxicity caused by silver nanoparticles (AgNPs) in mice, focusing on anti-inflammatory, anti-angiogenic, and hepatoprotective properties.
  • Fifty Swiss mice were divided into five groups to assess various treatment regimens, including a control group, one receiving the extract, and multiple groups exposed to AgNPs with or without the extract.
  • Results showed that the extract significantly improved liver function, reduced inflammation, and exhibited hepatoprotective effects in the group that received it after AgNP exposure, indicating its potential as a treatment for liver damage.
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Purpose: A wide range of cytokines has been demonstrated to be involved in the etiology of type 1 diabetes mellitus (T1DM). Gene polymorphisms may potentially contribute to a hereditary predisposition toward circulating cytokine levels as (high, intermediate, or low) since they can affect cytokine production or function. The aim of this study was to investigate the roles of cytokine levels and the association of single-nucleotide polymorphisms (SNPs) within cytokine genes with T1DM in Saudi children.

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Purpose: Currently 80% of lung transplant centers use induction immunosuppression. However, there is a lack of standardization of induction protocols within and across lung transplant centers. This study explores the association of two different induction immunosuppression strategies used at our center [single dose rabbit antithymocyte globulin (rATG) vs.

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Nickel (Ni) is a common metal with a nephrotoxic effect, damaging the kidneys. This study investigated the mechanism by which gallic acid (GA) protects mice kidneys against renal damage induced by Nickel oxide nanoparticles (NiO-NPs). Forty male Swiss albino mice were randomly assigned into four groups, each consisting of ten mice ( = 10/group): Group I the control group, received no treatment; Group II, the GA group, was administrated GA at a dosage of 110 mg/kg/day body weight; Group III, the NiO-NPs group, received injection of NiO-NPs at a concentration of 20 mg/kg body weight for 10 consecutive days; Group IV, the GA + NiO-NPs group, underwent treatment with both GA and NiO-NPs.

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Chimerism analysis is used to evaluate patients after allogeneic hematopoietic stem cell transplant (allo-HSCT) for engraftment and minimal measurable residual disease (MRD) monitoring. A combination of short-tandem repeat (STR) and quantitative polymerase chain reaction (qPCR) was required to achieve both sensitivity and accuracy in the patients with various chimerism statuses. In this study, an insertion/deletion-based multiplex chimerism assay by next generation sequencing (NGS) was evaluated using 5 simulated unrelated donor-recipient combinations from 10 volunteers.

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Article Synopsis
  • - The study investigates the impact of non-HLA antibodies in the development of chronic lung allograft dysfunction (CLAD), a major issue for lung transplant recipients, by analyzing data from 226 patients.
  • - Researchers identified a specific group of 18 non-HLA antibodies that were more prevalent in CLAD patients compared to those who were stable, with the presence of both non-HLA and donor-specific HLA antibodies creating an even higher risk for developing CLAD.
  • - Findings suggest that the presence of these antibodies contributes significantly to the risk of CLAD and graft loss, highlighting the importance of monitoring humoral immunity in lung transplant patients.
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HLA-C*03:648 differs from HLA-C*03:04:02 by one nucleotide substitution at Codon -23 (CGG > CTG) in exon 1.

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HLA-B*57:168 differs from HLA-B*57:01:01:01 by one nucleotide substitution at codon 325 (TGC > TCC) in exon 7.

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Background: Hepatocellular carcinoma (HCC) is the most common primary malignant tumor of the liver.

Aim: This study aimed to assess serum human telomerase enzyme (hTERT) levels and their relation to the progression of liver disease. Also, it aimed to assess the effect of hepatitis C virus (HCV) core protein on memory T-cells in HCV patients with or without HCC and the correlation between memory cell phenotype and the progression of the disease in the same patients.

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Purpose: Blood group B kidney transplant candidates have lower transplantation rates and longer waiting times compared to other blood groups. Kidney transplantation from blood group A2-to-B has offered a solution for these patients. This study aimed to investigate the impact of Basiliximab and Alemtuzumab induction therapies on kidney function and de novo donor-specific antibodies (DSA) in blood type A2-to-B kidney transplant recipients within the first 12 months of post-transplant.

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Background: Schistosomiasis is one of the most prevalent helminthic infections worldwide. Praziquantel (PZQ) resistance poses a possible danger to the disease's ability to be controlled. Little is known about the role of Ziziphus spina-christi leaf extract (ZLE) in the treatment of hepatic schistosomiasis.

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Chromium (Cr) is an environmental pollutant, has high redox potential, and can exist in various oxidation states, possibly leading to nephrotoxicity. As a potential treatment option, () is an herb remedy traditionally used as a phytomedicine to cure ailments. However, efficient validation of its protective effect and molecular mechanisms has not yet been established.

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Purpose: Induction immunosuppression has improved the long-term outcomes after kidney transplant. This study explores the association of different induction immunosuppression medications (Basiliximab vs. Alemtuzumab vs.

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Background: Since the initial clinical description of hypertrophic cardiomyopathy (HCM) over 60 years ago, sudden cardiac death (SCD) has been the most visible and feared complication of HCM.

Objectives: This study sought to characterize the temporal, geographic, and age-related trends of reported SCD rates in adult HCM patients.

Methods: Electronic databases were systematically searched up to November 2021 for studies reporting on SCD event rates in HCM patients.

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Chromium (Cr) is a common environmental pollutant that has wide-ranging toxic manifestations. () is an herbal medicine with anti-inflammatory properties and antioxidant activity. This study aims to evaluate the protective role of (whole plant) in attenuating Cr-induced nephrotoxicity in Swiss mice.

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The COVID-19 pandemic has led to significant morbidity and mortality in lung transplant recipients. Respiratory viral infections may be associated with de-novo HLA donor-specific antibody production and impact lung transplant outcome. Since one of the immunomodulation strategies post-SARS-CoV-2 infection in lung transplant recipients include decreasing or holding anti-metabolites, concerns have been raised for higher incidence of de-novo HLA donor specific antibody production in lung transplant recipients.

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Background: Histologic acute graft pyelonephritis (HAGPN) after kidney transplantation (KT) has been assessed less frequently than urinary tract infections (UTIs) or clinical acute graft pyelonephritis. Risk factors for HAGPN, its association with graft loss, and measures that might prevent it are not known.

Methods: We performed a retrospective review of HAGPN cases identified from KT occurring between January 2008 and December 2017 at our institution.

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Cadmium (Cd) is expected to cause deleterious effects on most organs, especially on the male reproductive system. The current study was performed to assess the effect of Cd on fertility in Swiss mice and to evaluate the protective role of caffeic acid phenethyl ester (CAPE) in relieving the detrimental effect of Cd. The mice were divided into four groups of 10: normal Group I received distilled water.

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Purpose: Induction immunosuppression has improved the long-term outcomes after lung transplant. This is the first report exploring the association of induction immunosuppression with the development of de novo donor-specific human leukocyte antigen (HLA) antibodies (DSA) in lung transplant recipients (LTR).

Methods: Sixty-seven consecutive primary LTR were followed for 3 years posttransplant.

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Objectives: Current diagnostic tests for tuberculosis (TB) in children living in low-endemic countries are limited by low specificity and the inability of the current tests to differentiate between active TB and latent TB infection (LTBI). This study aimed to evaluate the blood IP-10 mRNA expression level to detect LTBI in Egyptian pediatric household contacts (PHC).

Methods: TB-specific IP-10 and IFN-γ mRNA levels were assessed by real-time quantitative PCR (RT-qPCR) in 72 Egyptian PHC of active pulmonary TB cases.

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