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Wegner J, Zillinger T, Schlee-Guimaraes TM, Bartok E, Schlee M. An epigenetic GPI anchor defect impairs TLR4 signaling in the B cell transdifferentiation model for primary human monocytes BLaER1. Sci Rep 2021; 11:14983. [PMID: 34294787 PMCID: PMC8298422 DOI: 10.1038/s41598-021-94386-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 07/07/2021] [Indexed: 11/24/2022] Open
Abstract
Antigen-presenting myeloid cells like monocytes detect invading pathogens via pattern recognition receptors (PRRs) and initiate adaptive and innate immune responses. As analysis of PRR signaling in primary human monocytes is hampered by their restricted expandability, human monocyte models like THP-1 cells are commonly used for loss-of-function studies, such as with CRISPR-Cas9 editing. A recently developed transdifferentiation cell culture system, BLaER1, enables lineage conversion from malignant B cells to monocytes and was found superior to THP-1 in mimicking PRR signaling, thus being the first model allowing TLR4 and inflammasome pathway analysis. Here, we identified an important caveat when investigating TLR4-driven signaling in BLaER1 cells. We show that this model contains glycosylphosphatidylinositol (GPI) anchor-deficient cells, which lack CD14 surface expression when differentiated to monocytes, resulting in diminished LPS/TLR4 but not TLR7/TLR8 responsiveness. This GPI anchor defect is caused by epigenetic silencing of PIGH, leading to a random distribution of intact and PIGH-deficient clones after single-cell cloning. Overexpressing PIGH restored GPI-anchored protein (including CD14) expression and LPS responsiveness. When studying CD14- or other GPI-anchored protein-dependent pathways, researchers should consider this anomaly and ensure equal GPI-anchored protein expression when comparing cells that have undergone single-cell cloning, e. g. after CRISPR-Cas9 editing.
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Affiliation(s)
- Julia Wegner
- Institute of Clinical Chemistry and Clinical Pharmacology, University Hospital Bonn, Bonn, Germany.
| | - Thomas Zillinger
- Institute of Clinical Chemistry and Clinical Pharmacology, University Hospital Bonn, Bonn, Germany.,Institute of Immunology, Philipps-University Marburg, Marburg, Germany
| | | | - Eva Bartok
- Institute of Clinical Chemistry and Clinical Pharmacology, University Hospital Bonn, Bonn, Germany.,Unit of Experimental Immunology, Department of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium
| | - Martin Schlee
- Institute of Clinical Chemistry and Clinical Pharmacology, University Hospital Bonn, Bonn, Germany
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Zhang L, Tian W, Zhou B. Polymorphisms in Neuronal Growth Regulator 1 and Otoancorin Alternate the Susceptibility to Lung Cancer in Chinese Nonsmoking Females. DNA Cell Biol 2020; 39:1657-1663. [PMID: 32552051 DOI: 10.1089/dna.2020.5654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Cell adhesion molecules (CAMs) play crucial roles in the genesis and progress of tumor. We investigated the effects of single nucleotide polymorphisms (SNPs) of CAMs, neuronal growth regulator 1 (NEGR1), and Otoancorin (OTOA) on lung cancer susceptibility in Chinese nonsmoking females. Logistic regression and Cox regression analyses were conducted to investigate the effects of SNPs and environmental factors. For rs3102911, genotype TT carriers decreased the risk of lung cancer with an odds ratio (OR) of 0.635. AA genotypes of rs741718 increased the risk of lung cancer with an OR of 3.527. In stratified analysis, genotype AA carriers of rs741718 had a high susceptibility to lung adenocarcinoma compared with GG and AG genotypes. Analyses of association between SNPs and clinical characteristics revealed that rs3102911 as a protective factor and rs741718 as a risk factor influenced the lung cancer occurrence and progression in nonsmoking females.
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Affiliation(s)
- Ludan Zhang
- Department of Clinical Epidemiology, First Affiliated Hospital, China Medical University, Shenyang, China.,Department of Clinical Medicine, First Affiliated Hospital, China Medical University, Shenyang, China
| | - Wen Tian
- Department of Clinical Epidemiology, First Affiliated Hospital, China Medical University, Shenyang, China.,Department of Epidemiology, School of Public Health, China Medical University, Shenyang, China
| | - Baosen Zhou
- Department of Clinical Epidemiology, First Affiliated Hospital, China Medical University, Shenyang, China.,Department of Epidemiology, School of Public Health, China Medical University, Shenyang, China
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Sheth V, Kennedy V, de Lavallade H, Mclornan D, Potter V, Engelhardt BG, Savani B, Chinratanalab W, Goodman S, Greer J, Kassim A, York S, Kenyon M, Gandhi S, Kulasekararaj A, Marsh J, Mufti G, Pagliuca A, Jagasia M, Raj K. Differential Interaction of Peripheral Blood Lymphocyte Counts (ALC) With Different in vivo Depletion Strategies in Predicting Outcomes of Allogeneic Transplant: An International 2 Center Experience. Front Oncol 2019; 9:623. [PMID: 31355140 PMCID: PMC6636242 DOI: 10.3389/fonc.2019.00623] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 06/24/2019] [Indexed: 11/17/2022] Open
Abstract
Dosing regimens for antithymocyte globulin (ATG) and anti-CD52 antibody (alemtuzumab) for graft vs. host disease prophylaxis (GVHD) are empiric or weight-based, and do not account for individual patient factors. Recently, it has been shown that recipient peripheral blood absolute lymphocyte count (ALC) on the day of ATG administration interacts with the dose of ATG administered to predict transplantation outcome. Similarly, we wanted to analyze if the recipient ALC interacts with alemtuzumab dosing to predict outcomes. We retrospectively compared 364 patients, 124 patients receiving ATG (anti-thymocyte globulin) for GVHD prophylaxis, and undergoing unrelated first allogeneic transplant for myeloid and lymphoid malignancies (group 1) to 240 patients receiving alemtuzumab (group 2), in similar time period. There was no difference in survival or acute and chronic GVHD between 60 and 100 mg of alemtuzumab dosing. Unlike ATG (where the pre-transplant recipient ALC interacted with ATG dose on day of its administration (day 1) to predict OS and DFS (p = 0.05), within alemtuzumab group, the recipient ALC on second day of alemtuzumab administration (day 2) and its interaction with alemtuzumab dose strongly predicted OS, DFS and relapse (p = 0.05, HR-1.81, 1.1–3.3; p = 0.002, HR-2.41, CI, 1.3–4.2; and p = 0.003, HR-2.78, CI, 1.4–5.2), respectively. ALC (day 2) of 0.08 × 109/lit or higher, had a specificity of 96% in predicting inferior DFS. Like ATG, there is definite but differential interaction between the recipient peripheral blood ALC and alemtuzumab dose to predict OS, DFS, and relapses.
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Affiliation(s)
- Vipul Sheth
- Department of Haematology and Stem Cell Transplantation, Kings College Hospital, London, United Kingdom
| | - Vanessa Kennedy
- Department of Haematology and Stem Cell Transplant, Stanford University, Stanford, CA, United States
| | - Hugues de Lavallade
- Department of Haematology and Stem Cell Transplantation, Kings College Hospital, London, United Kingdom
| | - Donal Mclornan
- Department of Haematology and Stem Cell Transplantation, Kings College Hospital, London, United Kingdom
| | - Victoria Potter
- Department of Haematology and Stem Cell Transplantation, Kings College Hospital, London, United Kingdom
| | - Brian G Engelhardt
- Department of Haematology and Stem Cell Transplant, Vanderbilt University, Nashville, TN, United States
| | - Bipin Savani
- Department of Haematology and Stem Cell Transplant, Vanderbilt University, Nashville, TN, United States
| | - Wichai Chinratanalab
- Department of Haematology and Stem Cell Transplant, Vanderbilt University, Nashville, TN, United States
| | - Stacey Goodman
- Department of Haematology and Stem Cell Transplant, Vanderbilt University, Nashville, TN, United States
| | - John Greer
- Department of Haematology and Stem Cell Transplant, Vanderbilt University, Nashville, TN, United States
| | - Adetola Kassim
- Department of Haematology and Stem Cell Transplant, Vanderbilt University, Nashville, TN, United States
| | - Sally York
- Department of Haematology and Stem Cell Transplant, Vanderbilt University, Nashville, TN, United States
| | - Michelle Kenyon
- Department of Haematology and Stem Cell Transplantation, Kings College Hospital, London, United Kingdom
| | - Shreyans Gandhi
- Department of Haematology and Stem Cell Transplantation, Kings College Hospital, London, United Kingdom
| | - Austin Kulasekararaj
- Department of Haematology and Stem Cell Transplantation, Kings College Hospital, London, United Kingdom
| | - Judith Marsh
- Department of Haematology and Stem Cell Transplantation, Kings College Hospital, London, United Kingdom
| | - Ghulam Mufti
- Department of Haematology and Stem Cell Transplantation, Kings College Hospital, London, United Kingdom
| | - Antonio Pagliuca
- Department of Haematology and Stem Cell Transplantation, Kings College Hospital, London, United Kingdom
| | - Madan Jagasia
- Department of Haematology and Stem Cell Transplant, Vanderbilt University, Nashville, TN, United States
| | - Kavita Raj
- Department of Haematology and Stem Cell Transplantation, Kings College Hospital, London, United Kingdom
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Loeff FC, Rijs K, van Egmond EHM, Zoutman WH, Qiao X, Kroes WGM, Veld SAJ, Griffioen M, Vermeer MH, Neefjes J, Frederik Falkenburg JH, Halkes CJM, Jedema I. Loss of the GPI-anchor in B-lymphoblastic leukemia by epigenetic downregulation of PIGH expression. Am J Hematol 2019; 94:93-102. [PMID: 30370942 PMCID: PMC6587464 DOI: 10.1002/ajh.25337] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 10/11/2018] [Accepted: 10/24/2018] [Indexed: 01/08/2023]
Abstract
Adult B-lymphoblastic leukemia (B-ALL) is a hematological malignancy characterized by genetic heterogeneity. Despite successful remission induction with classical chemotherapeutics and novel targeted agents, enduring remission is often hampered by disease relapse due to outgrowth of a pre-existing subclone resistant against the treatment. In this study, we show that small glycophosphatidylinositol (GPI)-anchor deficient CD52-negative B-cell populations are frequently present already at diagnosis in B-ALL patients, but not in patients suffering from other B-cell malignancies. We demonstrate that the GPI-anchor negative phenotype results from loss of mRNA expression of the PIGH gene, which is involved in the first step of GPI-anchor synthesis. Loss of PIGH mRNA expression within these B-ALL cells follows epigenetic silencing rather than gene mutation or deletion. The coinciding loss of CD52 membrane expression may contribute to the development of resistance to alemtuzumab (ALM) treatment in B-ALL patients resulting in the outgrowth of CD52-negative escape variants. Additional treatment with 5-aza-2'-deoxycytidine may restore expression of CD52 and revert ALM resistance.
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Affiliation(s)
- Floris C. Loeff
- Department of Hematology; Leiden University Medical Center; Leiden The Netherlands
| | - Kevin Rijs
- Department of Hematology; Leiden University Medical Center; Leiden The Netherlands
| | | | - Willem H. Zoutman
- Department of Dermatology; Leiden University Medical Center; Leiden The Netherlands
| | - Xiaohang Qiao
- Division of Cell Biology; The Netherlands Cancer Institute; Amsterdam The Netherlands
| | - Wilhelmina G. M. Kroes
- Department of Clinical Genetics; Leiden University Medical Center; Leiden The Netherlands
| | - Sabrina A. J. Veld
- Department of Hematology; Leiden University Medical Center; Leiden The Netherlands
| | - Marieke Griffioen
- Department of Hematology; Leiden University Medical Center; Leiden The Netherlands
| | - Maarten H. Vermeer
- Department of Dermatology; Leiden University Medical Center; Leiden The Netherlands
| | - Jacques Neefjes
- Division of Cell Biology; The Netherlands Cancer Institute; Amsterdam The Netherlands
- Department of Chemical Immunology; Leiden University Medical Center; Leiden The Netherlands
| | | | | | - Inge Jedema
- Department of Hematology; Leiden University Medical Center; Leiden The Netherlands
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