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  1. Article ; Online: HLA-C*07:1044N a novel allele, caused by a single nucleotide deletion in exon 3 of HLA-C*07:01:01:01.

    Verboom, Murielle / Vergin, Lina / Streich, Hannah / Hallensleben, Michael

    HLA

    2023  Volume 101, Issue 6, Page(s) 687–688

    Abstract: HLA-C*07:1044N differs from HLA-C*07:01:01:01 by a single nucleotide deletion in exon 3, codon 124, nt. 442. ...

    Abstract HLA-C*07:1044N differs from HLA-C*07:01:01:01 by a single nucleotide deletion in exon 3, codon 124, nt. 442.
    MeSH term(s) Humans ; HLA-C Antigens/genetics ; Nucleotides ; Alleles ; Exons/genetics ; Codon ; Sequence Analysis, DNA ; Histocompatibility Testing
    Chemical Substances HLA-C Antigens ; Nucleotides ; Codon
    Language English
    Publishing date 2023-01-20
    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.14970
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: The novel HLA-DQB1*06 null allele, HLA-DQB1*06:423N, identified in a volunteer blood donor.

    Loeser, Evelyn / Hallensleben, Michael / Bernheiden, Martin / Rakhmanov, Mirzokhid / Emmerich, Florian

    HLA

    2022  Volume 100, Issue 2, Page(s) 186–188

    Abstract: A single nucleotide exchange in exon 2 at position 370 (C ->T) generates a preterminal STOP encoding a C-terminally truncated protein. ...

    Abstract A single nucleotide exchange in exon 2 at position 370 (C ->T) generates a preterminal STOP encoding a C-terminally truncated protein.
    MeSH term(s) Alleles ; Blood Donors ; HLA-DQ beta-Chains/genetics ; High-Throughput Nucleotide Sequencing ; Humans ; Volunteers
    Chemical Substances HLA-DQ beta-Chains ; HLA-DQB1 antigen
    Language English
    Publishing date 2022-05-18
    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.14641
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Book ; Thesis: Experimentelle Untersuchungen zur Genetik des Diabetes mellitus Typ 2

    Hallensleben, Michael

    1998  

    Author's details vorgelegt von Michael Hallensleben
    Language German
    Size VII, 95 Bl. : Ill., graph. Darst.
    Document type Book ; Thesis
    Thesis / German Habilitation thesis Hannover, Med. Hochsch., Diss., 1999
    HBZ-ID HT011140726
    Database Catalogue ZB MED Medicine, Health

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  4. Article ; Online: An Improved Protocol for Targeted Differentiation of Primed Human Induced Pluripotent Stem Cells into HLA-G-Expressing Trophoblasts to Enable the Modeling of Placenta-Related Disorders.

    Shum, Ian O / Merkert, Sylvia / Malysheva, Svitlana / Jahn, Kirsten / Lachmann, Nico / Verboom, Murielle / Frieling, Helge / Hallensleben, Michael / Martin, Ulrich

    Cells

    2023  Volume 12, Issue 16

    Abstract: Abnormalities at any stage of trophoblast development may result in pregnancy-related complications. Many of these adverse outcomes are discovered later in pregnancy, but the underlying pathomechanisms are constituted during the first trimester. ... ...

    Abstract Abnormalities at any stage of trophoblast development may result in pregnancy-related complications. Many of these adverse outcomes are discovered later in pregnancy, but the underlying pathomechanisms are constituted during the first trimester. Acquiring developmentally relevant material to elucidate the disease mechanisms is difficult. Human pluripotent stem cell (hPSC) technology can provide a renewable source of relevant cells. BMP4, A83-01, and PD173074 (BAP) treatment drives trophoblast commitment of hPSCs toward syncytiotrophoblast (STB), but lacks extravillous trophoblast (EVT) cells. EVTs mediate key functions during placentation, remodeling of uterine spiral arteries, and maintenance of immunological tolerance. We optimized the protocol for a more efficient generation of HLA-G
    MeSH term(s) Female ; Pregnancy ; Humans ; HLA-G Antigens ; Trophoblasts ; Induced Pluripotent Stem Cells ; Cell Differentiation
    Chemical Substances HLA-G Antigens ; A-83-01
    Language English
    Publishing date 2023-08-15
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2661518-6
    ISSN 2073-4409 ; 2073-4409
    ISSN (online) 2073-4409
    ISSN 2073-4409
    DOI 10.3390/cells12162070
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: In-Depth Profiling of T-Cell Responsiveness to Commonly Recognized CMV Antigens in Older People Reveals Important Sex Differences.

    Reus, Bernhard / Caserta, Stefano / Larsen, Martin / Morrow, George / Bano, Aalia / Hallensleben, Michael / Rajkumar, Chakravarthi / Pera, Alejandra / Kern, Florian

    Frontiers in immunology

    2021  Volume 12, Page(s) 707830

    Abstract: The impact of biological sex on T-cell immunity to Cytomegalovirus (CMV) has not been investigated in detail with only one published study comparing CMV-specific T-cell responses in men and women. Many studies, however, have shown an association between ... ...

    Abstract The impact of biological sex on T-cell immunity to Cytomegalovirus (CMV) has not been investigated in detail with only one published study comparing CMV-specific T-cell responses in men and women. Many studies, however, have shown an association between CMV infection and immunosenescence, with broad effects on peripheral blood lymphocyte subsets as well as the T and B-cell repertoires. Here, we provide a detailed analysis of CMV-specific T-cell responses in (n=94) CMV+ older people, including 47 women and 47 men aged between 60 and 93 years. We explore sex differences with respect to 16 different CMV proteins arranged in 14 peptide pools (overlapping peptides). Following ex vivo stimulation, CD4 and CD8 T-cells producing IFN-γ, TNF, and IL-2 were enumerated by flow-cytometry (intracellular cytokine staining). T-cell responses were evaluated in terms of each cytokine separately or in terms of cytokines produced simultaneously (polyfunctionality). Surface memory phenotype and CD3 downmodulation were assessed in parallel. The polyfunctionality index and a memory subset differentiation score were used to identify associations between response size, cytokine production, polyfunctionality, and memory subset distribution. While no significant sex differences were found with respect to overall CMV target protein selection, the T-cell response in men appeared more focused and accompanied by a more prominent accumulation of CMV-specific memory CD4 and CD8 T-cells. T-cell polyfunctionality and differentiation were similar in the sexes, however, CMV-specific T-cells in men produced more pro-inflammatory cytokines. Particularly, TNF production by CD4 T-cells was stronger in men than in women. Also, compared with women, men had larger responses to CMV proteins with immediate-early/early kinetics than women, which might have been driven by CMV reactivation. In conclusion, the CMV-specific T-cell response in men was larger and more pro-inflammatory than in women. Our findings may help explain sex differences in CMV-associated pathologies.
    MeSH term(s) Aged ; Aged, 80 and over ; Antigens, Viral/immunology ; CD4-Positive T-Lymphocytes/immunology ; CD8-Positive T-Lymphocytes/immunology ; Cytomegalovirus/immunology ; Cytomegalovirus Infections/immunology ; Female ; Humans ; Immunosenescence/immunology ; Male ; Middle Aged ; Sex Characteristics
    Chemical Substances Antigens, Viral
    Language English
    Publishing date 2021-08-13
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2606827-8
    ISSN 1664-3224 ; 1664-3224
    ISSN (online) 1664-3224
    ISSN 1664-3224
    DOI 10.3389/fimmu.2021.707830
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Assignment of C1q-binding HLA antibodies as unacceptable HLA antigens avoids positive CDC-crossmatches prior to transplantation of deceased donor organs.

    Juhl, David / Marget, Matthias / Hallensleben, Michael / Görg, Siegfried / Ziemann, Malte

    Transplant immunology

    2017  Volume 41, Page(s) 17–21

    Abstract: Soon, a virtual crossmatch shall replace the complement-dependent cytotoxicity (CDC) allocation crossmatch in the Eurotransplant region. To prevent positive CDC-crossmatches in the recipient centre, careful definition of unacceptable antigens is ... ...

    Abstract Soon, a virtual crossmatch shall replace the complement-dependent cytotoxicity (CDC) allocation crossmatch in the Eurotransplant region. To prevent positive CDC-crossmatches in the recipient centre, careful definition of unacceptable antigens is necessary. For highly sensitized patients, this is difficult by CDC alone. Assignment of all antibodies detected by sensitive assays, however, could prevent organ allocation. To assess the usefulness of the Luminex C1q-assay to prevent positive CDC-crossmatches, all CDC-crossmatches performed prior to deceased kidney transplantation in a 16-month-period were reviewed. Sera causing positive crossmatches were investigated by the C1q-assay. 31 out of 1432 crossmatches (2.2%) were positive. Sera involved in 26 positive crossmatches were available. C1q-binding donor-specific antibodies were detected in 19 sera (73.1%). The other sera were from recipients without any HLA antibodies detectable by CDC or common solid phase assays. Three patients had known Non-HLA antibodies causing positive CDC-results. Four crossmatches were only weak positive. Therefore, avoidance of donors with HLA antigens against whom C1q-binding antibodies were detected would have prevented all positive crossmatches due to HLA antibodies. Provided that all HLA specificities against which antibodies are detected by the Luminex C1q-assay are considered as unacceptable antigens, CDC-crossmatches prior to transplantation might safely be omitted in many patients. They should be maintained in highly immunized patients, however, for whom assignment of all C1q-positive antibodies as unacceptable antigens could lead to a significant delay or even prevention of transplantation.
    Language English
    Publishing date 2017-03
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1160846-8
    ISSN 1878-5492 ; 0966-3274
    ISSN (online) 1878-5492
    ISSN 0966-3274
    DOI 10.1016/j.trim.2017.01.001
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Impact of perioperative blood transfusions on postoperative renal function and survival after resection of colorectal liver metastases.

    Rodieck, Wiebke / Hallensleben, Michael / Robert, Julia / Beetz, Oliver / Grannas, Gerrit / Cammann, Sebastian / Oldhafer, Felix / Klempnauer, Juergen / Vondran, Florian W R / Kulik, Ulf

    World journal of surgical oncology

    2022  Volume 20, Issue 1, Page(s) 100

    Abstract: Background and aims: Recent studies focusing on thoracic surgery suggest postoperative kidney injury depending on the amount of perioperative blood transfusions. Data investigating similar effects after resection of colorectal liver metastases (CRLM) ... ...

    Abstract Background and aims: Recent studies focusing on thoracic surgery suggest postoperative kidney injury depending on the amount of perioperative blood transfusions. Data investigating similar effects after resection of colorectal liver metastases (CRLM) are not available. Aim of this study was therefore to evaluate the influence of perioperative blood transfusions on postoperative renal function and survival after resection of CRLM.
    Methods: Seven hundred twenty-seven cases of liver resection for CRLM were retrospectively analyzed. Renal function was measured via estimated glomerular filtration rate (eGFR) and a postoperative decline of ≥ 10% was considered substantial. Potential influences on postoperative kidney function were assessed using univariable and multivariable logistic regression analyses. Cox-regression analyses were performed to estimate the impact on overall survival (OS).
    Results: Preoperative impaired kidney function (p = 0.001, OR 2.477) and transfusion of > 2 units of packed red blood cells (PRBC) (p = 0.046; OR 1.638) were independently associated with an increased risk for ≥ 10% loss of renal function. Neither a pre-existing renal impairment, nor the additional loss of renal function were associated with reduced survival. Chemotherapies in the context of primary colorectal cancer treatment (p = 0.002), age > 70 years at liver resection (p = 0.005), number (p = 0.001), and size of metastases > 50 mm (p = 0.018), duration of resection > 120 min (p = 0.006) and transfusions of > 2 units of PRBC (p = 0.039) showed a negative independent influence on OS.
    Conclusion: The results demonstrate a negative impact of perioperative blood transfusions on the postoperative renal function and OS. Hence, efforts to reduce blood transfusions should be intensified.
    MeSH term(s) Aged ; Blood Transfusion ; Colorectal Neoplasms/pathology ; Colorectal Neoplasms/surgery ; Humans ; Kidney/pathology ; Kidney/physiology ; Liver Neoplasms/secondary ; Retrospective Studies
    Language English
    Publishing date 2022-03-30
    Publishing country England
    Document type Journal Article
    ZDB-ID 2118383-1
    ISSN 1477-7819 ; 1477-7819
    ISSN (online) 1477-7819
    ISSN 1477-7819
    DOI 10.1186/s12957-022-02559-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Non-invasive screening for subclinical liver graft injury in adults via donor-specific anti-HLA antibodies.

    Höfer, Anne / Jonigk, Danny / Hartleben, Björn / Verboom, Murielle / Hallensleben, Michael / Manns, Michael P / Jaeckel, Elmar / Taubert, Richard

    Scientific reports

    2020  Volume 10, Issue 1, Page(s) 14242

    Abstract: The majority of liver grafts exhibit abnormal histological findings late after transplantation, even when liver enzymes are normal. Such subclinical graft injuries were associated with rejection and fibrosis progression in recent studies. The ... ...

    Abstract The majority of liver grafts exhibit abnormal histological findings late after transplantation, even when liver enzymes are normal. Such subclinical graft injuries were associated with rejection and fibrosis progression in recent studies. The identification of non-invasive biomarkers for subclinical graft injury might help to individualize immunosuppression. Therefore, graft injury was assessed in 133 liver biopsies with normal/near normal liver enzymes from a prospective liver biopsy program. Cytokeratin-18 cell death marker (M65) and donor specific anti-HLA antibodies (DSA) were measured as non-invasive markers in paired plasma samples in addition to routine parameters. M65 was associated with subclinical graft injury but this association was too weak for reasonable clinical application. DSA positivity was associated with more graft inflammation (OR = 5.4) and more fibrosis (OR = 4.2). Absence of DSA excluded fibrosis in 87-89%, while presence of DSA excluded histological criteria for immunosuppression minimization attempts in 92-97%. While CK18 cell death marker had no diagnostic value for the detection of subclinical liver graft injury, DSA testing can help to preselect patients for immunosuppression reduction in case of DSA negativity, while DSA positivity should prompt elastography or liver biopsy for the assessment of subclinical graft injury.
    MeSH term(s) Adult ; Aged ; Allografts/pathology ; Biomarkers/blood ; Biopsy ; Female ; Graft Rejection/immunology ; Graft Survival ; HLA Antigens/immunology ; Humans ; Immunosuppression ; Isoantibodies/immunology ; Keratin-18/analysis ; Keratin-18/blood ; Keratin-18/immunology ; Liver/pathology ; Liver Transplantation/methods ; Male ; Middle Aged ; Peptide Fragments/immunology ; Retrospective Studies ; Tissue Donors ; Young Adult
    Chemical Substances Biomarkers ; HLA Antigens ; Isoantibodies ; Keratin-18 ; M65 antigen, human ; Peptide Fragments
    Language English
    Publishing date 2020-08-28
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-020-70938-7
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: DSA Are Associated With More Graft Injury, More Fibrosis, and Upregulation of Rejection-associated Transcripts in Subclinical Rejection.

    Höfer, Anne / Jonigk, Danny / Hartleben, Björn / Verboom, Murielle / Hallensleben, Michael / Hübscher, Stefan G / Manns, Michael P / Jaeckel, Elmar / Taubert, Richard

    Transplantation

    2019  Volume 104, Issue 3, Page(s) 551–561

    Abstract: Background: Subclinical T cell-mediated rejection (subTCMR) is commonly found after liver transplantation and has a good short-term prognosis, even when it is left untreated. Donor-specific antibodies (DSA) are putatively associated with a worse ... ...

    Abstract Background: Subclinical T cell-mediated rejection (subTCMR) is commonly found after liver transplantation and has a good short-term prognosis, even when it is left untreated. Donor-specific antibodies (DSA) are putatively associated with a worse prognosis for recipient and graft after liver transplantation.
    Methods: To assess the immune regulation in subTCMR grafts, gene expression of 93 transcripts for graft injury, tolerance, and immune regulation was analyzed in 77 biopsies with "no histologic rejection" (NHR; n = 25), "clinical TCMR" (cTMCR; n = 16), and subTCMR (n = 36). In addition, all available subTCMR biopsies (n = 71) were tested for DSA with bead assays.
    Results: SubTCMR showed heterogeneous and intermediate expression profiles of transcripts that were upregulated in cTCMR. Graft gene expression suggested a lower activation of effector lymphocytes and a higher activation of regulatory T cells in grafts with subTCMR compared to cTCMR. DSA positivity in subTCMR was associated with histological evidence of more severe graft inflammation and fibrosis. This more severe DSA+ associated graft injury in subTCMR was converged with an upregulation of cTCMR-associated transcripts. In nonsupervised analysis, DSA positive subTCMR mostly clustered together with cTCMR, while DSA negative subTCMR clustered together with NHR.
    Conclusions: T cell-mediated rejection seems to form a continuum of alloimmune activation. Although subTCMR exhibited less expression of TCMR-associated transcript, DSA positivity in subTCMR was associated with an upregulation of rejection-associated transcripts. The identification of DSA positive subclinical rejection might help to define patients with more inflammation in the graft and development of fibrosis.
    MeSH term(s) Adolescent ; Adult ; Aged ; Allografts/cytology ; Allografts/immunology ; Allografts/pathology ; Biopsy ; Female ; Fibrosis ; Gene Expression Profiling ; Graft Rejection/diagnosis ; Graft Rejection/immunology ; Graft Rejection/pathology ; Histocompatibility ; Humans ; Isoantibodies/analysis ; Isoantibodies/immunology ; Liver/cytology ; Liver/immunology ; Liver/pathology ; Liver Transplantation/adverse effects ; Male ; Middle Aged ; Prospective Studies ; T-Lymphocytes, Cytotoxic/immunology ; T-Lymphocytes, Cytotoxic/metabolism ; T-Lymphocytes, Regulatory/immunology ; T-Lymphocytes, Regulatory/metabolism ; Up-Regulation ; Young Adult
    Chemical Substances Isoantibodies
    Language English
    Publishing date 2019-10-25
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 208424-7
    ISSN 1534-6080 ; 0041-1337
    ISSN (online) 1534-6080
    ISSN 0041-1337
    DOI 10.1097/TP.0000000000003034
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Lung transplantation despite preformed donor-specific antihuman leukocyte antigen antibodies: a 9-year single-center experience.

    Heise, Emma L / Chichelnitskiy, Evgeny / Greer, Mark / Franz, Maximilian / Aburahma, Khalil / Iablonskii, Pavel / de Manna, Nunzio D / Christoph, Stella / Verboom, Murielle / Hallensleben, Michael / Boethig, Dietmar / Avsar, Murat / Welte, Tobias / Schwerk, Nicolaus / Sommer, Wiebke / Haverich, Axel / Warnecke, Gregor / Kuehn, Christian / Falk, Christine /
    Salman, Jawad / Ius, Fabio

    American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons

    2023  Volume 23, Issue 11, Page(s) 1740–1756

    Abstract: Pretransplant allosensitization to human leukocyte antigens (HLA) increases the recipient's waiting list time and mortality in lung transplantation. Rather than waiting for crossmatch-negative donors, since 2013, recipients with preformed donor-specific ... ...

    Abstract Pretransplant allosensitization to human leukocyte antigens (HLA) increases the recipient's waiting list time and mortality in lung transplantation. Rather than waiting for crossmatch-negative donors, since 2013, recipients with preformed donor-specific antiHLA antibodies (pfDSA) have been managed with repeated IgA- and IgM-enriched intravenous immunoglobulin (IgGAM) infusions, usually in combination with plasmapheresis before IgGAM and a single dose of antiCD20 antibody. This retrospective study presents our 9-year experience with patients transplanted with pfDSA. Records of patients transplanted between February 2013 and May 2022 were reviewed. Outcomes were compared between patients with pfDSA and those without any de novo donor-specific antiHLA antibodies. The median follow-up time was 50 months. Of the 1,043 patients who had undergone lung transplantation, 758 (72.7%) did not develop any early donor-specific antiHLA antibodies, and 62 (5.9%) patients exhibited pfDSA. Among the 52 (84%) patients who completed treatment, pfDSA was cleared in 38 (73%). In pfDSA vs control patients and at 8-year follow-up, respectively, graft survival (%) was 75 vs 65 (P = .493) and freedom from chronic lung allograft dysfunction (%) was 63 vs 65 (P = .525). In lung transplantation, crossing the preformed HLA-antibody barrier is safe using a treatment protocol based on IgGAM. Patients with pfDSA have a good 8-year graft survival rate and freedom from chronic lung allograft dysfunction, similar to control patients.
    MeSH term(s) Humans ; Retrospective Studies ; Antibodies ; Tissue Donors ; Lung Transplantation ; HLA Antigens ; Graft Rejection/etiology ; Graft Survival ; Histocompatibility Testing
    Chemical Substances Antibodies ; HLA Antigens
    Language English
    Publishing date 2023-05-22
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2060594-8
    ISSN 1600-6143 ; 1600-6135
    ISSN (online) 1600-6143
    ISSN 1600-6135
    DOI 10.1016/j.ajt.2023.04.034
    Database MEDical Literature Analysis and Retrieval System OnLINE

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