A Novel HLA Class I Allele, HLA-C*12:424, Identified Using Next-Generation Sequencing.

Discovery of a novel HLA class I allele, HLA-C*12:424, identified using two NGS methods.

Discovery of potential recombinant alleles HLA-DRB3*02:171 and HLA-DRB5*01:140.

Two novel alleles that appear to be generated from recombination between exons 2 and 3.

Low incidence of de novo HLA antibodies after COVID-19 vaccination: A cohort study of patients awaiting kidney transplantation.

Background: Antibodies against human leukocyte antigen (anti-HLA Abs) are associated with an increased risk of allograft loss. Herein, we report the prospective follow-up for anti-HLA Abs formation in 103 patients with end-stage kidney disease on the waiting list for transplantation who underwent COVID-19 vaccination.

Patients And Methods: Sera were tested before and after vaccination using Luminex technology.

Discovery of three novel HLA-DPA1 alleles, HLA-DPA1*01:147N, 01:03:47, and 02:106 using next-generation sequencing.

Characterization of three novel HLA-DPA1 alleles bearing null, synonymous, and non-synonymous mutations.

Identification of four novel HLA-DQ alleles, HLA-DQA1*01:106, -DQA1*01:107, -DQA1*05:74 and -DQB1*05:01:48.

Characterization of new alleles, three HLA-DQA1 and one HLA-DQB1, bearing non-synonymous and synonymous mutations, respectively.

Two novel HLA class I alleles, HLA-C*04:493 and -A*26:01:78, identified using next-generation sequencing.

Two novel HLA class I alleles bearing point mutations, HLA-C*04:493 and HLA- A*26:01:78, were identified.

Identification of a novel allele with a frameshift mutation, HLA-DRB4*01:165N, using next-generation sequencing.

HLA-DRB4*01:165N exhibits deletion of a nucleotide in exon 3, producing a premature stop codon.

Donor Genetic Predisposition to High Interleukin-10 Production Appears Protective against Acute Graft-Versus-Host Disease.

The persistence of graft-versus-host disease (GVHD) as the principal complication of allogeneic hematopoietic cell transplantation (HCT) demonstrates that HLA matching alone is insufficient to prevent alloreactivity. We performed molecular and functional characterization of 22 candidate cytokine genes for their potential to improve matching in 315 myeloablative, 10/10 HLA-matched donor−recipient pairs. Recipients of a graft carrying the -1082GG IL10 gene promoter region variant had a three-fold lower incidence of grade II−IV acute GVHD compared to IL10-1082AA graft recipients (SHR = 0.

Next-generation sequencing identifies two novel HLA class II alleles, HLA-DRB1*01:115 and HLA-DRB1*14:224.

We identified two novel HLA class II alleles by NGS, HLA-DRB1*01:115 and HLA-DRB1*14:224.

The novel HLA class II allele, DPB1*1284:01, identified using next-generation sequencing.

Our laboratory has identified DPB1*1284:01 as a novel HLA Class II allele by NGS.

SARS Cov-2 vaccination induces de novo donor-specific HLA antibodies in a renal transplant patient on waiting list: A case report.

The ability of COVID-19 vaccination to induce anti-HLA antibodies (Abs) formation in renal transplant candidates is not well studied. A 42-year-old man on a renal transplant waitlist, with no sensitization history, was tested for DSA before and after COVID-19 vaccination. Patient has consistently tested negative for COVID-19 virus.

Relevant SARS-CoV-2 Genome Variation through Six Months of Worldwide Monitoring.

Real-time genome monitoring of the SARS-CoV-2 pandemic outbreak is of utmost importance for designing diagnostic tools, guiding antiviral treatment and vaccination strategies. In this study, we present an accurate method for temporal and geographical comparison of mutational events based on GISAID database genome sequencing. Among 42523 SARS-CoV-2 genomes analyzed, we found 23202 variants compared to the reference genome.

Four novel HLA class II alleles identified using next-generation sequencing.

We describe here four novel HLA class II alleles, DPA1*01:33, DPB1*1082:01, DPB1*1144:01, and DQA1*01:45, identified in our laboratory following the implementation of next generation sequencing (NGS) for routine high resolution HLA typing of donors and recipients for solid organ transplant and hematopoetic stem cell transplant. The NGS technology has improved our ability to match at all clinically HLA loci and to facilitate the interpretation of allele specific antibody and eplet matching.

An Integrated Clinical and Genetic Prediction Model for Tacrolimus Levels in Pediatric Solid Organ Transplant Recipients.

Background: There are challenges in achieving and maintaining therapeutic tacrolimus levels after solid organ transplantation (SOT). The purpose of this genome-wide association study was to generate an integrated clinical and genetic prediction model for tacrolimus levels in pediatric SOT.

Methods: In a multicenter prospective observational cohort study (2015-2018), children <18 years old at their first SOT receiving tacrolimus as maintenance immunosuppression were included (455 as discovery cohort; 322 as validation cohort).

Comparison of abacavir-specific effector and proliferating functions of CD8 T cells in abacavir-treated HIV-1 patients.

Susceptibility to abacavir hypersensitivity (ABH) in HIV-1-positive patients is strongly linked to the carriage of HLA-B*57:01 and the potential mechanism includes drug-specific activation of cytokine producing CD8 T cells exclusively in individuals carrying HLA-B*57:01. Here, we report a detailed characterization of abacavir-induced functional response of CD8 T cells in HLA-B*57:01 individuals. Peripheral blood mononuclear cells (PBMNCs) from HLA-B*57:01 ABH and HLA-B*57:01 ABH individuals were stimulated with abacavir.

Comparison of sequence-specific oligonucleotide probe vs next generation sequencing for HLA-A, B, C, DRB1, DRB3/B4/B5, DQA1, DQB1, DPA1, and DPB1 typing: Toward single-pass high-resolution HLA typing in support of solid organ and hematopoietic cell transplant programs.

Many clinical laboratories supporting solid organ transplant programs use multiple HLA genotyping technologies, depending on individual laboratory needs. Sequence-specific primers and quantitative polymerase chain reaction (qPCR) serve the rapid turnaround necessary for deceased donor workup, while sequence-specific oligonucleotide probe (SSOP) technology is widely employed for higher volumes. When clinical need mandates high-resolution data, Sanger sequencing-based typing (SBT) has been the "gold standard.

The identification of a novel HLA-B allele, HLA-B*27:05:38.

HLA-B*27:05:38 differs from HLA-B*27:05:02:01 by 2 mismatches in exon 3, resulting in 2 synonymous mutations.

Identification of a novel HLA-C allele, HLA-C*07:778, in an unrelated hematopoietic stem cell donor.

HLA-C*07:778 differs from HLA-C*07:01:01:01 by a single nonsynonymous nucleotide substitution at codon 263 (CAC→CAG).

CD-34 and VE-cadherin endothelial progenitor cells in preeclampsia and normotensive pregnancies.

Objective: The objective of our study was to determine levels of endothelial progenitor cells (EPCs) in preeclampsia and normotensive pregnant women.

Study Design: Prospective cohort study of women with preeclampsia and normotensive pregnancies. EPCs were estimated by flow cytometry.

Genetic Polymorphisms of TLR4 and MICA are Associated with Severity of Trachoma Disease in Tanzania.

Aim: To examine the association of TLR4 Asp299Gly and MICA exon 5 microsatellites polymorphisms with severity of trachoma in a sub-Saharan East Africa population of Tanzanian villagers.

Methods: The samples were genotyped for MICA exon 5 microsatellites and the TLR4 299 A/G polymorphism by Restriction Fragment Length Polymorphism (RFLP), and GeneScan, respectively. The association of TLR4 Asp299Gly and MICA exon 5 microsatellites with inflammatory trachoma (TI) and trichiasis (TI) were examined.

Donor-Recipient Matching for KIR Genotypes Reduces Chronic GVHD and Missing Inhibitory KIR Ligands Protect against Relapse after Myeloablative, HLA Matched Hematopoietic Cell Transplantation.

Background: Allogeneic hematopoietic cell transplantation (HCT) can be curative for many hematologic diseases. However, complications such as graft-versus-host disease (GVHD) and relapse of primary malignancy remain significant and are the leading causes of morbidity and mortality. Effects of killer Ig-like receptors (KIR)-influenced NK cells on HCT outcomes have been extensively pursued over the last decade.

Ramadan fasting is not usually associated with the risk of cardiovascular events: A systematic review and meta-analysis.

Over one billion Muslims worldwide fast during the month of Ramadan. Ramadan fasting brings about some changes in the daily lives of practicing Muslims, especially in their diet and sleep patterns, which are associated with the risk of cardiovascular diseases. Over the years, many original studies have made the effort to identify the possible impact of the Ramadan fast on cardiovascular diseases.

HLA-DRB1 in Henoch-Schönlein purpura: A susceptibility study from North India.

Etiology of Henoch-Schönlein purpura (HSP) a small vessel vasculitis remains elusive. Susceptibility may be conferred by major histocompatibility complex. There are limited reports on the association of human leucocyte antigens (HLA) and HSP.

Human leukocyte antigen (HLA) and pharmacogenetics: screening for HLA-B*57:01 among human immunodeficiency virus-positive patients from southern Alberta.

The field of pharmacogenetics is witnessing a growing interest in the role of the human leukocyte antigen (HLA) in manifestation of adverse drug reactions (ADR). Here we report a retrospective analysis of the association of HLA-B*5701 with abacavir hypersensitivity syndrome (AHS) in a large Canadian cohort of 489 human immunodeficiency virus-1-positive patients exposed to abacavir. A total of 3.