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

    Yang, Guang / Abu-Khader, Ahmad / Burns, Caitlyn / Galaszkiewicz, Iwona / Berka, Noureddine

    HLA

    2022  Volume 100, Issue 1, Page(s) 103–104

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

    Abstract Our laboratory has identified DPB1*1284:01 as a novel HLA Class II allele by NGS.
    MeSH term(s) Alleles ; Genotype ; High-Throughput Nucleotide Sequencing ; Humans
    Language English
    Publishing date 2022-03-02
    Publishing country England
    Document type Journal Article
    ZDB-ID 2845111-9
    ISSN 2059-2310 ; 2059-2302
    ISSN (online) 2059-2310
    ISSN 2059-2302
    DOI 10.1111/tan.14587
    Database MEDical Literature Analysis and Retrieval System OnLINE

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

    Abu-Khader, Ahmad / Gareau, Alison J / Burns, Caitlyn / Khan, Faisal / Berka, Noureddine

    HLA

    2022  Volume 100, Issue 2, Page(s) 176–177

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

    Abstract We identified two novel HLA class II alleles by NGS, HLA-DRB1*01:115 and HLA-DRB1*14:224.
    MeSH term(s) Alleles ; Gene Frequency ; HLA-DRB1 Chains/genetics ; Haplotypes ; High-Throughput Nucleotide Sequencing ; Humans
    Chemical Substances HLA-DRB1 Chains
    Language English
    Publishing date 2022-04-12
    Publishing country England
    Document type Journal Article
    ZDB-ID 2845111-9
    ISSN 2059-2310 ; 2059-2302
    ISSN (online) 2059-2310
    ISSN 2059-2302
    DOI 10.1111/tan.14623
    Database MEDical Literature Analysis and Retrieval System OnLINE

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

    Abu-Khader, Ahmad / Hu, Qian / Kamar, Fareed / Galaszkiewicz, Iwona / Wang, Wenjie / Khan, Faisal / Berka, Noureddine

    Transplant infectious disease : an official journal of the Transplantation Society

    2023  Volume 25, Issue 6, Page(s) e14105

    Abstract: 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 ... ...

    Abstract 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. The cohort comprised of 62 males and 41 females with a mean age of 56 ± 14 years. The patients received BNT162b2 (80.4%), mRNA-1273 (18.5%), AZD1222 (0.40%), or ChAdOx1-S (0.80%) vaccine. Patients were tested before and within 119 ± 50, 95 ± 46 and 25 ± 26 days after the first, second, and third dose of the vaccine, respectively.
    Results: No significant change in calculated panel reactive antibody (cPRA) after vaccination was seen. Although 98.1% of patients had no change in anti-HLA Abs profile or cPRA after vaccination, two patients (1.9%) developed de novo anti-HLA Abs against class I or II HLA antigens. In those two patients, the cPRA changed from 0% and 63% at baseline to 9% and 90% after vaccination, respectively. Both patients received the BNT162b2 mRNA-based vaccine. The earliest detected anti-HLA Abs was 18 days after the first dose.
    Conclusion: In rare cases, new anti-HLA antibodies were observed after COVID-19 vaccination, with potential implications for transplantation. The low incidence of this phenomenon is outweighed by the clinical benefits of vaccination.
    MeSH term(s) Adult ; Aged ; Female ; Humans ; Male ; Middle Aged ; Antibodies, Viral ; BNT162 Vaccine ; ChAdOx1 nCoV-19 ; Cohort Studies ; COVID-19/epidemiology ; COVID-19/prevention & control ; COVID-19 Vaccines/administration & dosage ; HLA Antigens ; Incidence ; Kidney Transplantation ; Prospective Studies ; Vaccination
    Chemical Substances Antibodies, Viral ; BNT162 Vaccine ; ChAdOx1 nCoV-19 (B5S3K2V0G8) ; COVID-19 Vaccines ; HLA Antigens
    Language English
    Publishing date 2023-08-31
    Publishing country Denmark
    Document type Journal Article
    ZDB-ID 1476094-0
    ISSN 1399-3062 ; 1398-2273
    ISSN (online) 1399-3062
    ISSN 1398-2273
    DOI 10.1111/tid.14105
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: The novel HLA-DRB1*03:01:32 allele identified using next-generation sequencing.

    Abu-Khader, Ahmad / Rahmanian, Abootaleb / Stamm, Luz / Khan, Faisal / Berka, Noureddine

    HLA

    2021  Volume 98, Issue 2, Page(s) 177–178

    MeSH term(s) Alleles ; HLA-DRB1 Chains/genetics ; High-Throughput Nucleotide Sequencing ; Humans
    Chemical Substances HLA-DRB1 Chains ; HLA-DRB1*03:01 antigen
    Language English
    Publishing date 2021-05-24
    Publishing country England
    Document type Journal Article
    ZDB-ID 2845111-9
    ISSN 2059-2310 ; 2059-2302
    ISSN (online) 2059-2310
    ISSN 2059-2302
    DOI 10.1111/tan.14292
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Four novel HLA class II alleles identified using next-generation sequencing.

    Gareau, Alison / Abu-Khader, Ahmad / Yang, Guang / Stamm, Luz / Berka, Noureddine

    HLA

    2021  Volume 98, Issue 3, Page(s) 233–234

    Abstract: 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 ... ...

    Abstract 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.
    MeSH term(s) Alleles ; HLA Antigens ; High-Throughput Nucleotide Sequencing ; Histocompatibility Testing ; Organ Transplantation
    Chemical Substances HLA Antigens
    Language English
    Publishing date 2021-06-15
    Publishing country England
    Document type Journal Article
    ZDB-ID 2845111-9
    ISSN 2059-2310 ; 2059-2302
    ISSN (online) 2059-2310
    ISSN 2059-2302
    DOI 10.1111/tan.14338
    Database MEDical Literature Analysis and Retrieval System OnLINE

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

    Abu-Khader, Ahmad / Wang, Wenjie / Berka, Meriam / Galaszkiewicz, Iwona / Khan, Faisal / Berka, Noureddine

    HLA

    2021  Volume 99, Issue 1, Page(s) 25–30

    Abstract: 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 ... ...

    Abstract 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. Eighteen days after receiving first dose of mRNA-based vaccine, flow cytometry crossmatch (FCXM) was strongly positive with de novo donor-specific Ab (dnDSA) against B57 and de novo non-DSA against B58. Before vaccination, preliminary FCXM was negative with no anti-HLA Abs. This event prompted the transplant team to cancel the surgery. COVID-19 vaccination could be associated with anti-HLA Abs formation in renal patients on waitlists that could affect future transplantability.
    MeSH term(s) Adult ; Alleles ; COVID-19/prevention & control ; COVID-19 Vaccines/immunology ; Graft Rejection/prevention & control ; HLA Antigens/genetics ; Humans ; Isoantibodies/blood ; Kidney Transplantation ; Male ; Vaccination ; Waiting Lists
    Chemical Substances COVID-19 Vaccines ; HLA Antigens ; Isoantibodies
    Language English
    Publishing date 2021-11-28
    Publishing country England
    Document type Case Reports ; Journal Article
    ZDB-ID 2845111-9
    ISSN 2059-2310 ; 2059-2302
    ISSN (online) 2059-2310
    ISSN 2059-2302
    DOI 10.1111/tan.14492
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Advances in umbilical cord blood stem cell expansion and clinical translation.

    Pineault, Nicolas / Abu-Khader, Ahmad

    Experimental hematology

    2015  Volume 43, Issue 7, Page(s) 498–513

    Abstract: Umbilical cord blood (CB) is a rich source of hematopoietic stem cells (HSCs) with important applications in allogeneic stem cell transplantation. However, the low numbers of hematopoietic stem and progenitor cells (HSPCs) in banked units remain a major ... ...

    Abstract Umbilical cord blood (CB) is a rich source of hematopoietic stem cells (HSCs) with important applications in allogeneic stem cell transplantation. However, the low numbers of hematopoietic stem and progenitor cells (HSPCs) in banked units remain a major limitation. Protocols developed for HSPC expansion ex vivo or to improve HSPC homing to the marrow represent solutions to overcome this shortcoming. In recent decades, wide arrays of functionally divergent approaches were developed for the amplification of HSPCs. These include optimization of cytokine cocktails, coculture systems, small molecules, and delivery systems for HSPC-expansion genes. Herein, we review past and current strategies, focusing on studies that characterize the contribution of expanded CB HSPC to short- and long-term engraftment in transplantation models or in clinical trials. Also discussed are homing effectors used to promote engraftment. In summary, these studies underscore that early-acting cytokines alone can expand HSPC with short-term engraftment activity, but that robust expansion of HSPCs with long-term engraftment necessitates the synergistic action of multiple HSC-expansion agonists. In support of this, early clinical trials based on cytokine-driven HSPC-expansion protocols delivered disappointing results, whereas recent trials based on the synergistic action of cytokines and HSPC-expansion agonists reported significant improvements in engraftment and therapeutic outcomes. Conversely, molecules that enhance homing of HSPC may represent a complementary approach to improve and perhaps accelerate engraftment. Optimization of the next generation of HSPC-expansion and priming strategies should support a paradigm shift in CB transplantation in which smaller, better matched units may preferentially be used.
    MeSH term(s) Animals ; Cell Culture Techniques/methods ; Cell Division/drug effects ; Cell Movement ; Cells, Cultured/transplantation ; Clinical Trials as Topic ; Coculture Techniques ; Cord Blood Stem Cell Transplantation/methods ; Cytokines/pharmacology ; Drug Evaluation, Preclinical ; Drug Synergism ; Fetal Blood/cytology ; Genetic Association Studies ; Graft Survival/drug effects ; Hematopoietic Stem Cells/cytology ; Hematopoietic Stem Cells/drug effects ; Heterografts ; Humans ; Immunophenotyping/methods ; Intercellular Signaling Peptides and Proteins/pharmacology ; Mice ; Mice, Inbred NOD ; Mice, SCID ; Signal Transduction/genetics ; Small Molecule Libraries ; Stromal Cells/cytology ; Translational Medical Research ; Treatment Outcome
    Chemical Substances Cytokines ; Intercellular Signaling Peptides and Proteins ; Small Molecule Libraries
    Language English
    Publishing date 2015-07
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 185107-x
    ISSN 1873-2399 ; 0531-5573 ; 0301-472X
    ISSN (online) 1873-2399
    ISSN 0531-5573 ; 0301-472X
    DOI 10.1016/j.exphem.2015.04.011
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Rapid monitoring of immune reconstitution after allogeneic stem cell transplantation--a comparison of different assays for the detection of cytomegalovirus-specific T cells.

    Abu-Khader, Ahmad / Krause, Stefan

    European journal of haematology

    2013  Volume 91, Issue 6, Page(s) 534–545

    Abstract: Objectives: Cytotoxic T cells (CTLs) play an important role in controlling cytomegalovirus (CMV) infection after allogeneic hematopoietic stem cell transplantation (HSCT). The purpose of this study was to compare four different assays to detect CMV ... ...

    Abstract Objectives: Cytotoxic T cells (CTLs) play an important role in controlling cytomegalovirus (CMV) infection after allogeneic hematopoietic stem cell transplantation (HSCT). The purpose of this study was to compare four different assays to detect CMV antigen-specific T cells for the monitoring of CMV-specific immune reconstitution after HSCT.
    Methods: Comparative monitoring of CMV-specific T cells was performed using HLA tetramer, interferon-gamma enzyme-linked immunospot (ELISPOT), intracellular IFN-γ (IC-FACS), and real-time polymerase chain reaction (RT-PCR) assays with immunodominant CMV pp65-HLA-A2-restricted peptide and recombinant pp65-protein in 18 patients after allogeneic HSCT.
    Results: Using pp65-peptide to stimulate T cells in HLA-A2-positive patients, antigen-specific T cells have been detected in 43% (10 of 23) by IC-FACS, 62% (13 of 21) by tetramer, 68% (15 of 22) by RT-PCR, and 53% (10 of 19) by ELISPOT. No T-cell responses were detected in HLA-A2-negative patients by all assays. Stimulating with combination of both pp65-peptide and pp65-protein detected 72% (18/25) by IC-FACS, 88% (22/25) by RT-PCR, and 59% (12/22) by ELISPOT. Comparing the different methods of T-cell detection we found a significant positive correlation between RT-PCR and tetramer analysis, IC flow cytometry and ELISPOT assay. Using pp65-protein for T-cell activation overcomes the HLA restriction of the HLA-A2-restricted pp65-peptide stimulation, thus increasing the detection limit of antigen-specific T cells.
    Conclusion: CMV-specific T cells have been most frequently detected using RT-PCR suggesting a higher sensitivity compared with IC-FACS, tetramer, and ELISPOT assays. This technique allows rapid and sensitive monitoring of CMV-specific immune reconstitution after HSCT, which could guide prophylactic and therapeutic strategies to avoid active CMV disease.
    MeSH term(s) Antigens, Viral/immunology ; Cytomegalovirus/immunology ; Cytomegalovirus Infections/genetics ; Cytomegalovirus Infections/immunology ; Enzyme-Linked Immunosorbent Assay/methods ; Flow Cytometry/methods ; HLA-A2 Antigen/genetics ; HLA-A2 Antigen/immunology ; Haplotypes ; Hematopoietic Stem Cell Transplantation ; Humans ; Interferon-gamma/biosynthesis ; Peptide Fragments/immunology ; Phosphoproteins/chemistry ; Phosphoproteins/immunology ; Reverse Transcriptase Polymerase Chain Reaction/methods ; T-Lymphocyte Subsets/immunology ; T-Lymphocyte Subsets/metabolism ; T-Lymphocytes, Cytotoxic/immunology ; T-Lymphocytes, Cytotoxic/metabolism ; Transplantation, Homologous ; Viral Matrix Proteins/chemistry ; Viral Matrix Proteins/immunology
    Chemical Substances Antigens, Viral ; HLA-A2 Antigen ; Peptide Fragments ; Phosphoproteins ; Viral Matrix Proteins ; cytomegalovirus matrix protein 65kDa ; Interferon-gamma (82115-62-6)
    Language English
    Publishing date 2013-12
    Publishing country England
    Document type Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 392482-8
    ISSN 1600-0609 ; 0902-4441
    ISSN (online) 1600-0609
    ISSN 0902-4441
    DOI 10.1111/ejh.12187
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Knowledge and Attitude of the General Public Toward Palliative Care in Jordan: A Cross-Sectional Study.

    Altarifi, Ahmad A / Baker, Mohammed / Abedal-Kareem, Kenda / Abu-Ishqair, Abdullah / AbuMelhim, Zaina / Abu Shetayyah, Salman / Almhdawi, Khader A

    The American journal of hospice & palliative care

    2024  , Page(s) 10499091241231781

    Abstract: Palliative care is directed to relieve the symptoms of serious and life-threatening illnesses. Unfortunately, it's usually provided lately in the disease course in developing countries due to a lack of awareness about its concept, which deprives many ... ...

    Abstract Palliative care is directed to relieve the symptoms of serious and life-threatening illnesses. Unfortunately, it's usually provided lately in the disease course in developing countries due to a lack of awareness about its concept, which deprives many patients of its benefits. This study aims to investigate the knowledge and attitude of the Jordanian general public toward palliative care. A cross-sectional study was conducted using an electronic questionnaire via social media platforms. Knowledge about palliative care was measured using the "Palliative Care Knowledge Scale" (PaCKS), whereas the attitude was measured using an edited version of the "Frommelt Attitudes Toward Care of the Dying -B(FATCOD-B)" tool. The inclusion criteria were adults older than 18 years old who live in Jordan. Any subject who was younger than 18 years old, refused to give informed consent, and working or studying in a healthcare-related profession was excluded. 329 respondents filled out the survey (females = 214 (65%), mean age = 32.7 ± (13.63) years). Only 67 respondents (20.4%) heard about palliative care previously. The average knowledge score (out of 13) was 6.8 (±4.2). The average attitude score (out of 5) was 3.0 (±.4). Higher knowledge self-evaluation, older age, and higher income were factors associated with a higher level of knowledge and favorable attitude toward palliative care. Our study showed a moderate knowledge and neutral attitude toward palliative care. Further awareness campaigns should be conducted to raise the awareness of the Jordanian society regarding the objectives of palliative care.
    Language English
    Publishing date 2024-02-06
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1074344-3
    ISSN 1938-2715 ; 1049-9091
    ISSN (online) 1938-2715
    ISSN 1049-9091
    DOI 10.1177/10499091241231781
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Tuberculosis Notification in Jordan, 2016-2020.

    Khader, Yousef / Abaza, Hiba / Satyanarayana, Srinath / Abu Rumman, Ahmad Saleh / Alyousfi, Mohamad Nihad

    Epidemiologia (Basel, Switzerland)

    2023  Volume 4, Issue 3, Page(s) 276–285

    Abstract: The burden of tuberculosis (TB) in Jordan is largely unknown due to the paucity of high-quality data, under-reporting, and a lack of good quality vital registration system. This study aimed to assess the characteristics of TB patients in Jordan, ... ...

    Abstract The burden of tuberculosis (TB) in Jordan is largely unknown due to the paucity of high-quality data, under-reporting, and a lack of good quality vital registration system. This study aimed to assess the characteristics of TB patients in Jordan, determine the TB notification rate and assess the trend of TB notification in Jordan between 2016 and 2020.
    Language English
    Publishing date 2023-07-04
    Publishing country Switzerland
    Document type Journal Article
    ISSN 2673-3986
    ISSN (online) 2673-3986
    DOI 10.3390/epidemiologia4030028
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