Abstract
Purposes
STAT1 is a transduction and transcriptional regulator that functions within the classical JAK/STAT pathway. In addition to chronic mucocutaneous candidiasis, bacterial infections are a common occurrence in patients with STAT1 gain-of-function (GOF) mutations. These patients often exhibit skewing of B cell subsets; however, the impact of STAT1-GOF mutations on B cell-mediated humoral immunity remains largely unexplored. It is also unclear whether these patients with IgG within normal range require regular intravenous immunoglobulin (IVIG) therapy.
Methods
Eleven patients (harboring nine different STAT1-GOF mutations) were enrolled. Reporter assays and immunoblot analyses were performed to confirm STAT1 mutations. Flow cytometry, deep sequencing, ELISA, and ELISpot were conducted to assess the impact of STAT1-GOF on humoral immunity.
Results
All patients exhibited increased levels of phospho-STAT1 and total STAT1 protein, with two patients carrying novel mutations. In vitro assays showed that these two novel mutations were GOF mutations. Three patients with normal total IgG levels received regular IVIG infusions, resulting in effective control of bacterial infections. Four cases showed impaired affinity and specificity of pertussis toxin-specific antibodies, accompanied by reduced generation of class-switched memory B cells. Patients also had a disrupted immunoglobulin heavy chain (IGH) repertoire, coupled with a marked reduction in the somatic hypermutation frequency of switched Ig transcripts.
Conclusion
STAT1-GOF mutations disrupt B cell compartments and skew IGH characteristics, resulting in impaired affinity and antigen-specificity of antibodies and recurrent bacterial infections. Regular IVIG therapy can control these infections in patients, even those with normal total IgG levels.
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Data Availability
The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
Abbreviations
- STAT1:
-
Signal Transducer and Activator of Transcription 1
- AD:
-
Autosomal Dominant
- GOF:
-
Gain-of-Function
- LOF:
-
Loss-of-Function
- IVIG:
-
Intravenous Immunoglobulin
- IGH:
-
Immunoglobulin Heavy Chain
- BCR:
-
B cell Receptor
- GC:
-
Germinal Center
- MBC:
-
Memory B Cell
- CSR:
-
Class Switch Recombination
- SHM:
-
Somatic Hypermutation
- PBMC:
-
Peripheral Blood Mononuclear Cell
- IFN:
-
Interferon
- ELISpot:
-
Enzyme-linked Immunospot Assay
- PT:
-
Pertussis Toxin
- ELISA:
-
Enzyme-linked Immunosorbent Assay
- WT:
-
Wild type
- CADD:
-
Combined Annotation-Dependent Depletion
- MSC:
-
Mutation Significance Cutoff
- ASC:
-
Antibody-Secreting B Cell
- sMBC:
-
Class-Switched Memory B Cell
- CDR3:
-
Complementarity Determining Region 3
- CF100:
-
Cumulative Frequencies of the Top 100 Abundant Clones
- EBV:
-
Epstein-Barr Virus
- CMV:
-
Cytomegalovirus
References
Villarino AV, Kanno Y, O’Shea JJ. Mechanisms and consequences of Jak-STAT signaling in the immune system. Nat Immunol. 2017;18(4):374–84. https://doi.org/10.1038/ni.3691.
Zhang W, Chen X, Gao G, et al. Clinical Relevance of Gain- and Loss-of-Function Germline Mutations in STAT1: A Systematic Review. Front Immunol. 2021;12:654406. https://doi.org/10.3389/fimmu.2021.654406.
Toubiana J, Okada S, Hiller J, et al. Heterozygous STAT1 gain-of-function mutations underlie an unexpectedly broad clinical phenotype. Blood. 2016;127(25):3154–64. https://doi.org/10.1182/blood-2015-11-679902.
Chen X, Xu Q, Li X, et al. Molecular and Phenotypic Characterization of Nine Patients with STAT1 GOF Mutations in China. J Clin Immunol. 2020;40(1):82–95. https://doi.org/10.1007/s10875-019-00688-3.
Asano T, Utsumi T, Kagawa R, Karakawa S, Okada S. Inborn errors of immunity with loss- and gain-of-function germline mutations in STAT1. Clin Exp Immunol. 2023;212(2):96–106. https://doi.org/10.1093/cei/uxac106.
Akkaya M, Kwak K, Pierce SK. B cell memory: building two walls of protection against pathogens. Nat Rev Immunol. 2020;20(4):229–38. https://doi.org/10.1038/s41577-019-0244-2.
Laidlaw BJ, Cyster JG. Transcriptional regulation of memory B cell differentiation. Nat Rev Immunol. 2021;21(4):209–20. https://doi.org/10.1038/s41577-020-00446-2.
Methot SP, Di Noia JM. Molecular Mechanisms of Somatic Hypermutation and Class Switch Recombination. Adv Immunol. 2017;133:37–87. https://doi.org/10.1016/bs.ai.2016.11.002.
Gitlin AD, von Boehmer L, Gazumyan A, Shulman Z, Oliveira TY, Nussenzweig MC. Independent Roles of Switching and Hypermutation in the Development and Persistence of B Lymphocyte Memory. Immunity. 2016;44(4):769–81. https://doi.org/10.1016/j.immuni.2016.01.011.
Viant C, Weymar GHJ, Escolano A, et al. Antibody Affinity Shapes the Choice between Memory and Germinal Center B Cell Fates. Cell. 2020;183(5):1298-1311.e11. https://doi.org/10.1016/j.cell.2020.09.063.
Roco JA, Mesin L, Binder SC, et al. Class-Switch Recombination Occurs Infrequently in Germinal Centers. Immunity. 2019;51(2):337-350.e7. https://doi.org/10.1016/j.immuni.2019.07.001.
Kitaura K, Yamashita H, Ayabe H, Shini T, Matsutani T, Suzuki R. Different Somatic Hypermutation Levels among Antibody Subclasses Disclosed by a New Next-Generation Sequencing-Based Antibody Repertoire Analysis. Front Immunol. 2017;8:389. https://doi.org/10.3389/fimmu.2017.00389.
Tangye SG, Pathmanandavel K, Ma CS. Cytokine-mediated STAT-dependent pathways underpinning human B-cell differentiation and function. Curr Opin Immunol. 2023;81:102286. https://doi.org/10.1016/j.coi.2023.102286.
van Zelm MC, Bartol SJ, Driessen GJ, et al. Human CD19 and CD40L deficiencies impair antibody selection and differentially affect somatic hypermutation. J Allergy Clin Immunol. 2014;134(1):135–44. https://doi.org/10.1016/j.jaci.2013.11.015.
Berkowska MA, Driessen GJ, Bikos V, et al. Human memory B cells originate from three distinct germinal center-dependent and -independent maturation pathways. Blood. 2011;118(8):2150–8. https://doi.org/10.1182/blood-2011-04-345579.
Macdonald RA, Hosking CS, Jones CL. The measurement of relative antibody affinity by ELISA using thiocyanate elution. J Immunol Methods. 1988;106(2):191–4. https://doi.org/10.1016/0022-1759(88)90196-2.
Venselaar H, Te Beek TA, Kuipers RK, et al. Protein structure analysis of mutations causing inheritable diseases An e-Science approach with life scientist friendly interfaces. BMC Bioinformatics. 2010;11:548. https://doi.org/10.1186/1471-2105-11-548.
Kagawa R, Fujiki R, Tsumura M, et al. Alanine-scanning mutagenesis of human signal transducer and activator of transcription 1 to estimate loss- or gain-of-function variants. J Allergy Clin Immunol. 2017;140(1):232–41. https://doi.org/10.1016/j.jaci.2016.09.035.
Itan Y, Shang L, Boisson B, et al. The mutation significance cutoff: gene-level thresholds for variant predictions. Nat Methods. 2016;13(2):109–10. https://doi.org/10.1038/nmeth.3739.
Kircher M, Witten DM, Jain P, O’Roak BJ, Cooper GM, Shendure J. A general framework for estimating the relative pathogenicity of human genetic variants. Nat Genet. 2014;46(3):310–5. https://doi.org/10.1038/ng.2892.
Zhang P, Bigio B, Rapaport F, et al. PopViz: a webserver for visualizing minor allele frequencies and damage prediction scores of human genetic variations. Bioinformatics. 2018;34(24):4307–9. https://doi.org/10.1093/bioinformatics/bty536.
Kitaura K, Yamashita H, Ayabe H, et al. Different Somatic Hypermutation Levels among Antibody Subclasses Disclosed by a New Next-Generation Sequencing-Based Antibody Repertoire Analysis. Front Immunol. 2017;8:389. https://doi.org/10.3389/fimmu.2017.00389.
Ma CS, Wong N, Rao G, et al. Unique and shared signaling pathways cooperate to regulate the differentiation of human CD4+ T cells into distinct effector subsets. J Exp Med. 2016;213(8):1589–608. https://doi.org/10.1084/jem.20151467.
Largent AD, Lambert K, Chiang K, et al. Dysregulated IFN-γ signals promote autoimmunity in STAT1 gain-of-function syndrome. Sci Transl Med. 2023;15(703):eade7028. https://doi.org/10.1126/scitranslmed.ade7028.
Ma CS, Wong N, Rao G, et al. Monogenic mutations differentially affect the quantity and quality of T follicular helper cells in patients with human primary immunodeficiencies. J Allergy Clin Immunol. 2015;136(4):993-1006.e1. https://doi.org/10.1016/j.jaci.2015.05.036.
Al Shehri T, Gilmour K, Gothe F, et al. Novel gain-of-function mutation in Stat1 sumoylation site leads to CMC/CID phenotype responsive to ruxolitinib. J Clin Immunol. 2019;39:776–85. https://doi.org/10.1007/s10875-019-00687-4.
van Zelm MC, Bosco JJ, Aui PM, et al. Impaired STAT3-Dependent Upregulation of IL2Rα in B Cells of a Patient With a STAT1 Gain-of-Function Mutation. Front Immunol. 2019;10:768. https://doi.org/10.3389/fimmu.2019.00768.
Smyth AE, Kaleviste E, Snow A, Kisand K, McMahon CJ, Cant AJ, et al. Aortic calcification in a patient with a gain-of-function STAT1 mutation. J Clin Immunol. 2018;38:468–70. https://doi.org/10.1007/s10875-018-0513-z.
Marinelli L, Ristagno E, Fischer P, Abraham R, Joshi A. Cryptococcal pneumonia in an adolescent with a gain-of-function variant in signal transduction and activator of transcription 1 (STAT1). BMJ Case Rep. 2020;13:e234120. https://doi.org/10.1136/bcr-2019-234120.
Hartono SP, Vargas-Hernández A, Ponsford MJ, et al. Novel STAT1 Gain-of-Function Mutation Presenting as Combined Immunodeficiency. J Clin Immunol. 2018;38(7):753–6. https://doi.org/10.1007/s10875-018-0554-3.
Delmonte OM, Bergerson JRE, Burbelo PD, et al. Antibody responses to the SARS-CoV-2 vaccine in individuals with various inborn errors of immunity. J Allergy Clin Immunol. 2021;148(5):1192–7. https://doi.org/10.1016/j.jaci.2021.08.016.
Chi X, Li Y, Qiu X. V(D)J recombination, somatic hypermutation and class switch recombination of immunoglobulins: mechanism and regulation. Immunology. 2020;160(3):233–47. https://doi.org/10.1111/imm.13176.
Horiuchi K, Imai K, Mitsui-Sekinaka K, et al. Analysis of somatic hypermutations in the IgM switch region in human B cells. J Allergy Clin Immunol. 2014;134(2):411–9. https://doi.org/10.1016/j.jaci.2014.02.043.
Cagigi A, Misasi J, Ploquin A, et al. Vaccine Generation of Protective Ebola Antibodies and Identification of Conserved B-Cell Signatures. J Infect Dis. 2018;218:S528–36. https://doi.org/10.1093/infdis/jiy333.
Avery DT, Deenick EK, Ma CS, et al. B cell-intrinsic signaling through IL-21 receptor and STAT3 is required for establishing long-lived antibody responses in humans. J Exp Med. 2010;207(1):155–71. https://doi.org/10.1084/jem.20091706.
Kirkham PM, Schroeder HW Jr. Antibody structure and the evolution of immunoglobulin V gene segments. Semin Immunol. 1994;6(6):347–60. https://doi.org/10.1006/smim.1994.1.
Acknowledgements
The authors thank all the patients, their families, and healthy volunteers for their participation in the study.
Funding
This work was supported by the National Natural Science Foundation of China (Grant number 82070135 and 82071845), National Key R&D Program of China (Grant number 2021YFC2700804).
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Ran Chen and Huilin Mu mainly performed the study and wrote the manuscript. Xuemei Chen and Miyuki Tsumura performed some experiments. Lina Zhou and Xinhui Jiang revised the manuscript. Zhiyong Zhang, Xuemei Tang, Yongwen Chen and Yanjun Jia collected the samples and characterized patient clinical information. Satoshi Okada revised the manuscript, and provided advice on the design of the study. Xiaodong Zhao and Yunfei An designed the research. All authors read and approved the final manuscript.
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Chen, R., Mu, H., Chen, X. et al. Qualitative Immunoglobulin Deficiency Causes Bacterial Infections in Patients with STAT1 Gain-of-Function Mutations. J Clin Immunol 44, 124 (2024). https://doi.org/10.1007/s10875-024-01720-x
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DOI: https://doi.org/10.1007/s10875-024-01720-x