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Rabaan AA, Alfaraj AH, Alshengeti A, Alawfi A, Alwarthan S, Alhajri M, Al-Najjar AH, Al Fares MA, Najim MA, Almuthree SA, AlShurbaji ST, Alofi FS, AlShehail BM, AlYuosof B, Alynbiawi A, Alzayer SA, Al Kaabi N, Abduljabbar WA, Bukhary ZA, Bueid AS. Antibodies to Combat Fungal Infections: Development Strategies and Progress. Microorganisms 2023; 11:microorganisms11030671. [PMID: 36985244 PMCID: PMC10051215 DOI: 10.3390/microorganisms11030671] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 02/23/2023] [Accepted: 02/24/2023] [Indexed: 03/09/2023] Open
Abstract
The finding that some mAbs are antifungal suggests that antibody immunity may play a key role in the defense of the host against mycotic infections. The discovery of antibodies that guard against fungi is a significant advancement because it gives rise to the possibility of developing vaccinations that trigger protective antibody immunity. These vaccines might work by inducing antibody opsonins that improve the function of non-specific (such as neutrophils, macrophages, and NK cells) and specific (such as lymphocyte) cell-mediated immunity and stop or aid in eradicating fungus infections. The ability of antibodies to defend against fungi has been demonstrated by using monoclonal antibody technology to reconsider the function of antibody immunity. The next step is to develop vaccines that induce protective antibody immunity and to comprehend the mechanisms through which antibodies mediate protective effects against fungus.
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Affiliation(s)
- Ali A. Rabaan
- Molecular Diagnostic Laboratory, Johns Hopkins Aramco Healthcare, Dhahran 31311, Saudi Arabia
- College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia
- Department of Public Health and Nutrition, The University of Haripur, Haripur 22610, Pakistan
- Correspondence:
| | - Amal H. Alfaraj
- Pediatric Department, Abqaiq General Hospital, First Eastern Health Cluster, Abqaiq 33261, Saudi Arabia
| | - Amer Alshengeti
- Department of Pediatrics, College of Medicine, Taibah University, Al-Madinah 41491, Saudi Arabia
- Department of Infection Prevention and Control, Prince Mohammad Bin Abdulaziz Hospital, National Guard Health Affairs, Al-Madinah 41491, Saudi Arabia
| | - Abdulsalam Alawfi
- Department of Pediatrics, College of Medicine, Taibah University, Al-Madinah 41491, Saudi Arabia
| | - Sara Alwarthan
- Department of Internal Medicine, College of Medicine, Imam Abdulrahman Bin Faisal University, Dammam 34212, Saudi Arabia
| | - Mashael Alhajri
- Department of Internal Medicine, College of Medicine, Imam Abdulrahman Bin Faisal University, Dammam 34212, Saudi Arabia
| | - Amal H. Al-Najjar
- Drug & Poison Information Center, Pharmacy Department, Security Forces Hospital Program, Riyadh 11481, Saudi Arabia
| | - Mona A. Al Fares
- Department of Internal Medicine, King Abdulaziz University Hospital, Jeddah 21589, Saudi Arabia
| | - Mustafa A. Najim
- Department of Medical Laboratories Technology, College of Applied Medical Sciences, Taibah University, Madinah 41411, Saudi Arabia
| | - Souad A. Almuthree
- Department of Infectious Disease, King Abdullah Medical City, Makkah 43442, Saudi Arabia
| | - Sultan T. AlShurbaji
- Outpatient Pharmacy, Dr. Sulaiman Alhabib Medical Group, Diplomatic Quarter, Riyadh 91877, Saudi Arabia
| | - Fadwa S. Alofi
- Department of Infectious Diseases, King Fahad Hospital, Madinah 42351, Saudi Arabia
| | - Bashayer M. AlShehail
- Pharmacy Practice Department, College of Clinical Pharmacy, Imam Abdulrahman Bin Faisal University, Dammam 31441, Saudi Arabia
| | - Buthina AlYuosof
- Directorate of Public Health, Dammam Network, Eastern Health Cluster, Dammam 31444, Saudi Arabia
| | - Ahlam Alynbiawi
- Infectious Diseases Section, Medical Specialties Department, King Fahad Medical City, Riyadh 12231, Saudi Arabia
| | - Suha A. Alzayer
- Parasitology Laboratory Department, Qatif Comprehensive Inspection Center, Qatif 31911, Saudi Arabia
| | - Nawal Al Kaabi
- Department of Pediatric Infectious Disease, Sheikh Khalifa Medical City, Abu Dhabi 51900, United Arab Emirates
| | - Wesam A. Abduljabbar
- Department of Medical Laboratory Sciences, Fakeeh College for Medical Science, Jeddah 21134, Saudi Arabia
| | - Zakiyah A. Bukhary
- Department of Internal Medicine, King Fahad General Hospital, Jeddah 23325, Saudi Arabia
| | - Ahmed S. Bueid
- Microbiology Laboratory, King Faisal General Hospital, Al-Ahsa 31982, Saudi Arabia
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2
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McMillan JKP, O’Donnell P, Chang SP. Pattern recognition receptor ligand-induced differentiation of human transitional B cells. PLoS One 2022; 17:e0273810. [PMID: 36040923 PMCID: PMC9426890 DOI: 10.1371/journal.pone.0273810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 08/15/2022] [Indexed: 12/01/2022] Open
Abstract
B cells represent a critical component of the adaptive immune response whose development and differentiation are determined by antigen-dependent and antigen-independent interactions. In this study, we explored the effects of IL-4 and pattern-recognition receptor (PRR) ligands on B cell development and differentiation by investigating their capacity to drive the in vitro maturation of human transitional B cells. In the presence of IL-4, ligands for TLR7/8, TLR9, and NOD1 were effective in driving the in vitro maturation of cord blood transitional B cells into mature, naïve B cells as measured by CD23 expression, ABCB1 transporter activation and upregulation of sIgM and sIgD. In addition, several stimulation conditions, including TLR9 ligand alone, favored an expansion of CD27+ IgM memory B cells. Transitional B cells stimulated with TLR7/8 ligand + IL-4 or TLR9 ligand, with or without IL-4, induced a significant subpopulation of CD23+CD27+ B cells expressing high levels of sIgM and sIgD, a minor B cell subpopulation found in human peripheral blood. These studies illustrate the heterogeneity of the B cell populations induced by cytokine and PRR ligand stimulation. A comparison of transitional and mature, naïve B cells transcriptomes to identify novel genes involved in B cell maturation revealed that mature, naïve B cells were less transcriptionally active than transitional B cells. Nevertheless, a subset of differentially expressed genes in mature, naïve B cells was identified including genes associated with the IL-4 signaling pathway, PI3K signaling in B lymphocytes, the NF-κB signaling pathway, and the TNFR superfamily. When transitional B cells were stimulated in vitro with IL-4 and PRR ligands, gene expression was found to be dependent on the nature of the stimulants, suggesting that exposure to these stimulants may alter the developmental fate of transitional B cells. The influence of IL-4 and PRR signaling on transitional B cell maturation illustrates the potential synergy that may be achieved when certain PRR ligands are incorporated as adjuvants in vaccine formulations and presented to developing B cells in the context of an inflammatory cytokine environment. These studies demonstrate the potential of the PRR ligands to drive transitional B cell differentiation in the periphery during infection or vaccination independently of antigen mediated BCR signaling.
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Affiliation(s)
- Jourdan K. P. McMillan
- Department of Tropical Medicine, Medical Microbiology and Pharmacology, John A Burns School of Medicine, University of Hawaii at Manoa, Honolulu, HI, United States of America
- * E-mail:
| | - Patrick O’Donnell
- Kapiolani Medical Center for Women and Children, Hawaii Pacific Health, Honolulu, HI, United States of America
| | - Sandra P. Chang
- Department of Tropical Medicine, Medical Microbiology and Pharmacology, John A Burns School of Medicine, University of Hawaii at Manoa, Honolulu, HI, United States of America
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3
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Kumánovics A, Sadighi Akha AA. Flow cytometry for B-cell subset analysis in immunodeficiencies. J Immunol Methods 2022; 509:113327. [DOI: 10.1016/j.jim.2022.113327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Revised: 06/07/2022] [Accepted: 08/01/2022] [Indexed: 11/28/2022]
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4
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França TT, Barreiros LA, Salgado RC, Napoleão SMDS, Gomes LN, Ferreira JFS, Prando C, Weber CW, Di Gesu RSW, Montenegro C, Aranda CS, Kuntze G, Staines-Boone AT, Venegas-Montoya E, Becerra JCA, Bezrodnik L, Di Giovanni D, Moreira I, Seminario GA, Raccio ACG, Dorna MDB, Rosário-Filho NA, Chong-Neto HJ, de Carvalho E, Grotta MB, Orellana JC, Dominguez MG, Porras O, Sasia L, Salvucci K, Garip E, Leite LFB, Forte WCN, Pinto-Mariz F, Goudouris E, Nuñez MEN, Schelotto M, Ruiz LB, Liberatore DI, Ochs HD, Cabral-Marques O, Condino-Neto A. CD40 Ligand Deficiency in Latin America: Clinical, Immunological, and Genetic Characteristics. J Clin Immunol 2022; 42:514-526. [PMID: 34982304 DOI: 10.1007/s10875-021-01182-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 11/16/2021] [Indexed: 12/14/2022]
Abstract
CD40 ligand (CD40L) deficiency is a rare inborn error of immunity presenting with heterogeneous clinical manifestations. While a detailed characterization of patients affected by CD40L deficiency is essential to an accurate diagnosis and management, information about this disorder in Latin American patients is limited. We retrospectively analyzed data from 50 patients collected by the Latin American Society for Immunodeficiencies registry or provided by affiliated physicians to characterize the clinical, laboratory, and molecular features of Latin American patients with CD40L deficiency. The median age at disease onset and diagnosis was 7 months and 17 months, respectively, with a median diagnosis delay of 1 year. Forty-seven patients were genetically characterized revealing 6 novel mutations in the CD40LG gene. Pneumonia was the most common first symptom reported (66%). Initial immunoglobulin levels were variable among patients. Pneumonia (86%), upper respiratory tract infections (70%), neutropenia (70%), and gastrointestinal manifestations (60%) were the most prevalent clinical symptoms throughout life. Thirty-five infectious agents were reported, five of which were not previously described in CD40L deficient patients, representing the largest number of pathogens reported to date in a cohort of CD40L deficient patients. The characterization of the largest cohort of Latin American patients with CD40L deficiency adds novel insights to the recognition of this disorder, helping to fulfill unmet needs and gaps in the diagnosis and management of patients with CD40L deficiency.
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Affiliation(s)
- Tábata Takahashi França
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil.
| | - Lucila Akune Barreiros
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Ranieri Coelho Salgado
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | | | - Lillian Nunes Gomes
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | | | - Carolina Prando
- Hospital Pequeno Príncipe, Curitiba, Brazil.,Faculdades Pequeno Príncipe, Curitiba, Brazil.,Instituto de Pesquisa Pelé Pequeno Príncipe, Curitiba, Brazil
| | | | | | | | - Carolina Sanchez Aranda
- Serviço de Alergia e Imunologia, Departamento de Pediatria, Universidade Federal de São Paulo, São Paulo, Brazil.,Jeffrey Modell Center São Paulo, São Paulo, Brazil
| | | | - Aidé Tamara Staines-Boone
- Immunology Service, Hospital de Especialidades Unidad Médica de Alta Especialidad (UMAE, Instituto Mexicano del Seguro Social (IMSS), Monterrey, México
| | - Edna Venegas-Montoya
- Immunology Service, Hospital de Especialidades Unidad Médica de Alta Especialidad (UMAE, Instituto Mexicano del Seguro Social (IMSS), Monterrey, México
| | | | - Liliana Bezrodnik
- Grupo de Imunologia, Hospital de Niños Ricardo Gutierrez, Buenos Aires, Argentina
| | - Daniela Di Giovanni
- Grupo de Imunologia, Hospital de Niños Ricardo Gutierrez, Buenos Aires, Argentina
| | - Ileana Moreira
- Grupo de Imunologia, Hospital de Niños Ricardo Gutierrez, Buenos Aires, Argentina
| | | | | | - Mayra de Barros Dorna
- Divisão de Alergia e Imunologia, Departamento de Pediatria, Instituto da Criança, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | | | | | - Elisa de Carvalho
- Gastroenterology and Hepatology Clínic, Brasilia Childrens Hospital, Brasília, Brazil
| | | | - Julio Cesar Orellana
- Division Alergia e Imunologia Clinica, Hospital de Niños de La Santísima Trinidad, Córdoba, Argentina
| | | | - Oscar Porras
- Hospital Nacional de Niños Dr. Carlos Sáenz Herrera, San José, Costa Rica
| | - Laura Sasia
- Hospital Infantil Municipal de Córdoba, Córdoba, Argentina
| | | | - Emilio Garip
- Hospital Infantil Municipal de Córdoba, Córdoba, Argentina
| | - Luiz Fernando Bacarini Leite
- Department of Pediatrics, Immunodeficiency Sector, Irmandade da Santa Casa de Misericórdia de São Paulo, São Paulo, Brazil
| | | | - Fernanda Pinto-Mariz
- Department of Pediatrics, School of Medicine, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Ekaterini Goudouris
- Department of Pediatrics, School of Medicine, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - María Enriqueta Nuñez Nuñez
- Department of Pediatrics, Division of Pediatric Allergy and Immunology, Hospital Civil de Guadalajara Dr. Juan I. Menchaca, Guadalajara, México
| | | | - Laura Berrón Ruiz
- Unidad de Investigación en Inmunodeficiencias, Instituto Nacional de Pediatría, Ciudad del México, México
| | | | - Hans D Ochs
- Department of Pediatrics, University of Washington School of Medicine, Seattle Children's Research Institute, Seattle, WA, USA
| | - Otavio Cabral-Marques
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil.,Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil.,Network of Immunity in Infection, Malignancy, and Autoimmunity (NIIMA), Universal Scientific Education and Research Network (USERN), São Paulo, Brazil
| | - Antonio Condino-Neto
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil. .,Jeffrey Modell Center São Paulo, São Paulo, Brazil.
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5
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Mormile I, Punziano A, Riolo CA, Granata F, Williams M, de Paulis A, Spadaro G, Rossi FW. Common Variable Immunodeficiency and Autoimmune Diseases: A Retrospective Study of 95 Adult Patients in a Single Tertiary Care Center. Front Immunol 2021; 12:652487. [PMID: 34290696 PMCID: PMC8287325 DOI: 10.3389/fimmu.2021.652487] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 06/15/2021] [Indexed: 11/22/2022] Open
Abstract
Common variable immunodeficiency (CVID) is the most common clinically significant primary immunodeficiency in adulthood, which presents a broad spectrum of clinical manifestations, often including non-infectious complications in addition to heightened susceptibility to infections. These protean manifestations may significantly complicate the differential diagnosis resulting in diagnostic delay and under-treatment with increased mortality and morbidity. Autoimmunity occurs in up to 30% of CVID patients, and it is an emerging cause of morbidity and mortality in this type of patients. 95 patients (42 males and 53 females) diagnosed with CVID, basing on ESID diagnostic criteria, were enrolled in this retrospective cohort study. Clinical phenotypes were established according to Chapel 2012: i) no other disease-related complications, ii) cytopenias (thrombocytopenia/autoimmune hemolytic anemia/neutropenia), iii) polyclonal lymphoproliferation (granuloma/lymphoid interstitial pneumonitis/persistent unexplained lymphadenopathy), and iv) unexplained persistent enteropathy. Clinical items in the analysis were age, gender, and clinical features. Laboratory data included immunoglobulin (Ig)G, IgM and IgA levels at diagnosis, flow-cytometric analysis of peripheral lymphocytes (CD3+, CD3+CD4+, CD3+CD8+, CD19+, CD4+CD25highCD127low, CD19hiCD21loCD38lo, and follicular T helper cell counts). Comparisons of continuous variables between groups were performed with unpaired t-test, when applicable. 39 patients (41%) showed autoimmune complications. Among them, there were 21 females (53.8%) and 18 males (46.2%). The most prevalent autoimmune manifestations were cytopenias (17.8%), followed by arthritis (11.5%), psoriasis (9.4%), and vitiligo (6.3%). The most common cytopenia was immune thrombocytopenia, reported in 10 out of 95 patients (10.5%), followed by autoimmune hemolytic anemia (n=3, 3.1%) and autoimmune neutropenia (n=3, 3.1%). Other autoimmune complications included thyroiditis, coeliac disease, erythema nodosum, Raynaud’s phenomenon, alopecia, recurring oral ulcers, autoimmune gastritis, and primary biliary cholangitis. There were no statistically significant differences comparing immunoglobulin levels between CVID patients with or without autoimmune manifestations. There was no statistical difference in CD3+, CD8+, CD4+CD25highCD127low T, CD19, CD19hiCD21loCD38lo, and follicular T helper cell counts in CVID patients with or without autoimmune disorders. In conclusion, autoimmune manifestations often affect patients with CVID. Early recognition and tailored treatment of these conditions are pivotal to ensure a better quality of life and the reduction of CVID associated complications.
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Affiliation(s)
- Ilaria Mormile
- Department of Translational Medical Sciences, University of Naples Federico II, Naples, Italy
| | - Alessandra Punziano
- Department of Translational Medical Sciences, University of Naples Federico II, Naples, Italy
| | - Carlo Alberto Riolo
- Post-Graduate Program in Clinical Immunology and Allergy, University of Naples Federico II, Naples, Italy
| | - Francescopaolo Granata
- Department of Translational Medical Sciences, University of Naples Federico II, Naples, Italy
| | - Michela Williams
- Department of Translational Medical Sciences, University of Naples Federico II, Naples, Italy
| | - Amato de Paulis
- Department of Translational Medical Sciences, University of Naples Federico II, Naples, Italy.,Center for Basic and Clinical Immunology Research (CISI), WAO Center of Excellence, University of Naples Federico II, Naples, Italy
| | - Giuseppe Spadaro
- Department of Translational Medical Sciences, University of Naples Federico II, Naples, Italy.,Center for Basic and Clinical Immunology Research (CISI), WAO Center of Excellence, University of Naples Federico II, Naples, Italy
| | - Francesca Wanda Rossi
- Department of Translational Medical Sciences, University of Naples Federico II, Naples, Italy.,Center for Basic and Clinical Immunology Research (CISI), WAO Center of Excellence, University of Naples Federico II, Naples, Italy
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6
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Ito T, Iwamoto S, Hirayama M, Yamada Y, Azuma E. Transient hypogammaglobulinemia of infancy may be associated with reduced switched memory B cells and del (16) (p11.2p12). Clin Case Rep 2021; 9:e3837. [PMID: 34188919 PMCID: PMC8218327 DOI: 10.1002/ccr3.3837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 01/02/2021] [Accepted: 01/05/2021] [Indexed: 11/16/2022] Open
Abstract
Transient hypogammaglobulinemia of infancy may be associated with chromosome del (16)(p11.2) that has reportedly been associated with other forms of primary immunodeficiency (Clin Immunol, 2009, 131, 24; J Allergy Clin Immunol, 2015;135, 1569).
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Affiliation(s)
- Tsuyoshi Ito
- Department of PediatricsToyohashi Municipal HospitalToyohashiJapan
| | - Shotaro Iwamoto
- Department of PediatricsMie University Graduate School of MedicineTsuJapan
| | - Masahiro Hirayama
- Department of PediatricsMie University Graduate School of MedicineTsuJapan
| | - Yasuharu Yamada
- Department of Clinical EngineeringSuzuka University of Medical ScienceSuzukaJapan
| | - Eiichi Azuma
- Department of Clinical EngineeringSuzuka University of Medical ScienceSuzukaJapan
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7
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Renner ED, Krätz CE, Orange JS, Hagl B, Rylaarsdam S, Notheis G, Durandy A, Torgerson TR, Ochs HD. Class Switch Recombination Defects: impact on B cell maturation and antibody responses. Clin Immunol 2020; 222:108638. [PMID: 33276124 DOI: 10.1016/j.clim.2020.108638] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 11/06/2020] [Accepted: 11/24/2020] [Indexed: 10/22/2022]
Abstract
To assess how B cell phenotype analysis correlates with antigen responses in patients with class switch recombination defects (CSRD) we quantified memory B cells by flow-cytometry and immunized CSRD patients with the neoantigen bacteriophage phiX174 (phage). CSRD patients showed uniformly absent or markedly reduced switched memory B cells (IgM-IgD-CD27+). CD40L patients had reduced CD27+ memory B cells (both non-switched and switched). In NEMO patients, results varied depending on the IKKγ gene variant. Three of four AID patients had normal percentages of CD27+ memory B cells while CD27+IgM-IgD- switched memory B cells were markedly reduced in all AID patients. Antibody response to phage was remarkably decreased with lack of memory amplification and class-switching in immunized CD40L, UNG deficient, and NEMO patients. Distinct B-cell phenotype pattern correlated with abnormal antibody responses to a T-cell dependent neoantigen, representing a powerful tool to identify CSRD patients.
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Affiliation(s)
- Ellen D Renner
- University of Washington School of Medicine and Seattle Children's Research Institute, Seattle, WA, USA; Translational Immunology, Chair and Institute of Environmental Medicine, UNIKA-T, Technical University of Munich and Helmholtz Zentrum München, Munich, Augsburg, Germany
| | - Carolin E Krätz
- University Children's Hospital, Dr. von Haunersches Kinderspital, Ludwig Maximilian University, Munich, Germany; Translational Immunology, Chair and Institute of Environmental Medicine, UNIKA-T, Technical University of Munich and Helmholtz Zentrum München, Munich, Augsburg, Germany
| | - Jordan S Orange
- Columbia University, Department of Pediatrics, New York, United States of America
| | - Beate Hagl
- University Children's Hospital, Dr. von Haunersches Kinderspital, Ludwig Maximilian University, Munich, Germany; Translational Immunology, Chair and Institute of Environmental Medicine, UNIKA-T, Technical University of Munich and Helmholtz Zentrum München, Munich, Augsburg, Germany
| | - Stacey Rylaarsdam
- University of Washington School of Medicine and Seattle Children's Research Institute, Seattle, WA, USA
| | - Gundula Notheis
- University Children's Hospital, Dr. von Haunersches Kinderspital, Ludwig Maximilian University, Munich, Germany; Translational Immunology, Chair and Institute of Environmental Medicine, UNIKA-T, Technical University of Munich and Helmholtz Zentrum München, Munich, Augsburg, Germany
| | - Anne Durandy
- Laboratory of Human Lymphohaematopoiesis, INSERM UMR 1163, Imagine Institute, Paris, France; Université Paris Descartes-Sorbonne Paris Cité, Imagine Institute, Paris, France
| | - Troy R Torgerson
- University of Washington School of Medicine and Seattle Children's Research Institute, Seattle, WA, USA
| | - Hans D Ochs
- University of Washington School of Medicine and Seattle Children's Research Institute, Seattle, WA, USA.
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8
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Zu J, Yao L, Song Y, Cui Y, Guan M, Chen R, Zhen Y, Li S. Th2 Biased Immunity With Altered B Cell Profiles in Circulation of Patients With Sporotrichosis Caused by Sporothrix globosa. Front Immunol 2020; 11:570888. [PMID: 33281813 PMCID: PMC7691245 DOI: 10.3389/fimmu.2020.570888] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 10/16/2020] [Indexed: 11/26/2022] Open
Abstract
Sporotrichosis is a subcutaneous mycotic infection, and Sporothrixglobosa is one of the causative agents with a worldwide distribution, notably in Asia. However, the immune profile in human sporotrichosis caused by S. globosa still remains obscure. Here, we demonstrated enhanced Th2 response in circulation with significant increases in Th2 frequency, Th2/Tregs as well as IL-4 seretion in patients. Elevated IL-17A+Th17 percentage was accompanied with reduced IL-17A level in serum, which may imply a dysfunction of this CD4+T subset in S. globosa infection. In addition, Th2 percentage, the ratios of Th2/Tregs and Th17/Tregs were all raised in patients with fixed cutaneous form, while only Th2/Tregs displayed increment in lymphocutaneous form. Meanwhile, the percentage of double negative B cells was significantly increased and positively correlated with Th2 and Tregs in whole patients. Except naïve B cells, all memory B cells together with Th2 cells increased in patients with short duration (less than 6 months), which may suggest a collaboration of T cells with altered B cell profile in human sporotrichosis caused by S. globosa. In consistent with the changes of IFN-γ+Th1, IL-4+Th2 and IL-17A+Th17 in patients with short duration, the percentages of these effector T cells all expanded when cocultured with S. globosa yeast cells in vitro. These data shed light on the potential involvement of peripheral T and B cell immunity against this mycotic infection and indicated that different immune responses existed in different stages of sporotrichosis; meanwhile different immune profile may contribute to different clinical manifestations of this disease.
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Affiliation(s)
- Jianjiao Zu
- Department of Dermatology and Venerology, The First Hospital of Jilin University, Changchun, China
| | - Lei Yao
- Department of Dermatology and Venerology, The First Hospital of Jilin University, Changchun, China
| | - Yang Song
- Department of Dermatology and Venerology, The First Hospital of Jilin University, Changchun, China
| | - Yan Cui
- Department of Dermatology and Venerology, The First Hospital of Jilin University, Changchun, China
| | - Mengqi Guan
- Department of Dermatology and Venerology, The First Hospital of Jilin University, Changchun, China
| | - Ruili Chen
- Department of Dermatology and Venerology, The First Hospital of Jilin University, Changchun, China
| | - Yu Zhen
- Department of Dermatology and Venerology, The First Hospital of Jilin University, Changchun, China
| | - Shanshan Li
- Department of Dermatology and Venerology, The First Hospital of Jilin University, Changchun, China
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9
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Moeini Shad T, Yousefi B, Amirifar P, Delavari S, Rae W, Kokhaei P, Abolhassani H, Aghamohammadi A, Yazdani R. Variable Abnormalities in T and B Cell Subsets in Ataxia Telangiectasia. J Clin Immunol 2020; 41:76-88. [PMID: 33052516 DOI: 10.1007/s10875-020-00881-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 09/29/2020] [Indexed: 01/03/2023]
Abstract
BACKGROUND Ataxia-telangiectasia (AT) is a rare genetic condition, caused by biallelic deleterious variants in the ATM gene, and has variable immunological abnormalities. This study aimed to examine immunologic parameters reflecting cell development, activation, proliferation, and class switch recombination (CSR) and determine their relationship to the clinical phenotype in AT patients. METHODS In this study, 40 patients with a confirmed diagnosis of AT from the Iranian immunodeficiency registry center and 28 age-sex matched healthy controls were enrolled. We compared peripheral B and T cell subsets and T cell proliferation response to CD3/CD28 stimulation in AT patients with and without CSR defects using flow cytometry. RESULTS A significant decrease in naïve, transitional, switched memory, and IgM only memory B cells, along with a sharp increase in the marginal zone-like and CD21low B cells was observed in the patients. We also found CD4+ and CD8+ naïve, central memory, and terminally differentiated effector memory CD4+ (TEMRA) T cells were decreased. CD4+ and CD8+ effector memory, CD8+ TEMRA, and CD4+ regulatory T cells were significantly elevated in our patients. CD4+ T cell proliferation was markedly impaired compared to the healthy controls. Moreover, immunological investigations of 15 AT patients with CSR defect revealed a significant reduction in the marginal zone, switched memory, and more intense defects in IgM only memory B cells, CD4+ naïve and central memory T cells. CONCLUSION The present study revealed that patients with AT have a broad spectrum of cellular and humoral deficiencies. Therefore, a detailed evaluation of T and B cell subsets increases understanding of the disease in patients and the risk of infection.
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Affiliation(s)
- Tannaz Moeini Shad
- Department of Immunology, Semnan University of Medical Sciences, Semnan, Iran.,Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Bahman Yousefi
- Department of Immunology, Semnan University of Medical Sciences, Semnan, Iran
| | - Parisa Amirifar
- Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran.,Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Samaneh Delavari
- Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - William Rae
- Cambridge Institute of Therapeutic Immunology and Infectious Disease, Jeffrey Cheah Biomedical Centre, Cambridge Biomedical Campus, Cambridge, UK.,Department of Medicine, University of Cambridge School of Clinical Medicine, Cambridge Biomedical Campus, Cambridge, UK
| | - Parviz Kokhaei
- Cancer Research Center, Semnan University of Medical Sciences, Semnan, Iran.,Department of Oncology-Pathology, BioClinicum, Karolinska University Hospital Solna and Karolinska Institutet, Stockholm, Sweden
| | - Hassan Abolhassani
- Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran.,Research Center for Primary Immunodeficiencies, Iran University of Medical Sciences, Tehran, Iran.,Division of Clinical Immunology, Department of Laboratory Medicine, Karolinska Institute at Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Asghar Aghamohammadi
- Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran.
| | - Reza Yazdani
- Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran.
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10
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Abstract
The importance of B cell and antibody-mediated immune response in the acute and long-term persistence of transplanted solid organs has become increasingly evident in recent years. A variety of therapeutic innovations target antibodies directed toward HLA or blood groups (ABO) to allow better allocation and posttransplant longevity of organs. Antibodies originate from plasma cells (PCs), which are terminally differentiated B cells. Long-term production and persistence of these antibodies is partly due to fast reactivation of previously generated memory B cells; however, there is increasing evidence that some differentiated PCs can persist independently in the bone marrow for years or even decades, producing specific antibodies or even experiencing regeneration without proliferation without need to be replaced by newly differentiating B cells. This review outlines the currently presumed pathways of differentiation, antibody, and memory generation on both B-cell and PC levels. On this background, current therapeutic concepts for antibody reduction before and after solid organ transplantation are considered, to better understand their mechanisms, possible synergisms, and specific risks. Specific differences in regards to ABO versus HLA antibodies as well as practical relevance for generation of desensitization and posttransplant antibody-directed therapy protocols are discussed.
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11
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Sanz I, Wei C, Jenks SA, Cashman KS, Tipton C, Woodruff MC, Hom J, Lee FEH. Challenges and Opportunities for Consistent Classification of Human B Cell and Plasma Cell Populations. Front Immunol 2019; 10:2458. [PMID: 31681331 PMCID: PMC6813733 DOI: 10.3389/fimmu.2019.02458] [Citation(s) in RCA: 306] [Impact Index Per Article: 61.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Accepted: 10/01/2019] [Indexed: 12/11/2022] Open
Abstract
The increasingly recognized role of different types of B cells and plasma cells in protective and pathogenic immune responses combined with technological advances have generated a plethora of information regarding the heterogeneity of this human immune compartment. Unfortunately, the lack of a consistent classification of human B cells also creates significant imprecision on the adjudication of different phenotypes to well-defined populations. Additional confusion in the field stems from: the use of non-discriminatory, overlapping markers to define some populations, the extrapolation of mouse concepts to humans, and the assignation of functional significance to populations often defined by insufficient surface markers. In this review, we shall discuss the current understanding of human B cell heterogeneity and define major parental populations and associated subsets while discussing their functional significance. We shall also identify current challenges and opportunities. It stands to reason that a unified approach will not only permit comparison of separate studies but also improve our ability to define deviations from normative values and to create a clean framework for the identification, functional significance, and disease association with new populations.
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Affiliation(s)
- Ignacio Sanz
- Lowance Center for Human Immunology, Emory University, Atlanta, GA, United States.,Division of Rheumatology, Department of Medicine, Emory University, Atlanta, GA, United States
| | - Chungwen Wei
- Lowance Center for Human Immunology, Emory University, Atlanta, GA, United States.,Division of Rheumatology, Department of Medicine, Emory University, Atlanta, GA, United States
| | - Scott A Jenks
- Lowance Center for Human Immunology, Emory University, Atlanta, GA, United States.,Division of Rheumatology, Department of Medicine, Emory University, Atlanta, GA, United States
| | - Kevin S Cashman
- Lowance Center for Human Immunology, Emory University, Atlanta, GA, United States.,Division of Rheumatology, Department of Medicine, Emory University, Atlanta, GA, United States
| | - Christopher Tipton
- Lowance Center for Human Immunology, Emory University, Atlanta, GA, United States.,Division of Rheumatology, Department of Medicine, Emory University, Atlanta, GA, United States
| | - Matthew C Woodruff
- Lowance Center for Human Immunology, Emory University, Atlanta, GA, United States.,Division of Rheumatology, Department of Medicine, Emory University, Atlanta, GA, United States
| | - Jennifer Hom
- Lowance Center for Human Immunology, Emory University, Atlanta, GA, United States.,Division of Rheumatology, Department of Medicine, Emory University, Atlanta, GA, United States
| | - F Eun-Hyung Lee
- Lowance Center for Human Immunology, Emory University, Atlanta, GA, United States.,Division of Pulmonary, Allergy, and Critical Care, Department of Medicine, Emory University, Atlanta, GA, United States
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12
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The formation of mutated IgM memory B cells in rat splenic marginal zones is an antigen dependent process. PLoS One 2019; 14:e0220933. [PMID: 31490967 PMCID: PMC6730915 DOI: 10.1371/journal.pone.0220933] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Accepted: 07/26/2019] [Indexed: 11/19/2022] Open
Abstract
Previous studies in rodents have indicated that only a minor fraction of the immunoglobulin heavy chain variable region (IGHV-Cμ) transcripts carry somatic mutations and are considered memory B cells. This is in marked contrast to humans where nearly all marginal zone B (MZ-B) cells are mutated. Here we show in rats that the proportion of mutated IgM+ MZ-B cells varies significantly between the various IGHV genes analyzed, ranging from 27% mutated IGHV5 transcripts to 65% mutated IGHV4 transcripts. The observed data on mutated sequences in clonally-related B cells with a MZ-B cell or follicular B (FO-B) cell phenotype indicates that mutated IgM+ MZ-B and FO-B cells have a common origin. To further investigate the origin of mutated IgM+ MZ-B cells we determined whether mutations occurred in rearranged IGHV-Cμ transcripts using IGHV4 and IGHV5 genes from neonatal rat MZ-B cells and FO-B cells. We were not able to detect mutations in any of the IGHV4 and IGHV5 genes expressed by MZ-B cells or FO-B cells obtained from neonatal rat spleens. Germinal centres (GCs) are absent from neonatal rat spleen in the first few weeks of their life, and no mutations were found in any of the neonatal sequences, not even in the IGHV4 gene family which accumulates the highest number of mutated sequences (66%) in the adult rat. Therefore, these data do not support the notion that MZ-B cells in rats mutate their IGHV genes as part of their developmental program, but are consistent with the notion that mutated rat MZ-B cells require GCs for their generation. Our findings support that the splenic MZ of rats harbors a significant number of memory type IgM+ MZ-B cells with mutated IGHV genes and propose that these memory MZ-B cells are probably generated as a result of an antigen driven immune response in GCs, which still remains to be proven.
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13
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Du X, Tang W, Chen X, Zeng T, Wang Y, Chen Z, Xu T, Zhou L, Tang X, An Y, Zhao X. Clinical, genetic and immunological characteristics of 40 Chinese patients with CD40 ligand deficiency. Scand J Immunol 2019; 90:e12798. [PMID: 31179555 DOI: 10.1111/sji.12798] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 04/29/2019] [Accepted: 06/05/2019] [Indexed: 01/08/2023]
Affiliation(s)
- Xiao Du
- Ministry of Education Key Laboratory of Child Development and Disorders Children’s Hospital of Chongqing Medical University Chongqing China
- Chongqing Key Laboratory of Child Infection and Immunity Children’s Hospital of Chongqing Medical University Chongqing China
| | - Wenjing Tang
- Division of Rheumatology and Immunology Children’s Hospital of Chongqing Medical University Chongqing China
| | - Xuemei Chen
- Ministry of Education Key Laboratory of Child Development and Disorders Children’s Hospital of Chongqing Medical University Chongqing China
- Chongqing Key Laboratory of Child Infection and Immunity Children’s Hospital of Chongqing Medical University Chongqing China
| | - Ting Zeng
- Ministry of Education Key Laboratory of Child Development and Disorders Children’s Hospital of Chongqing Medical University Chongqing China
- Chongqing Key Laboratory of Child Infection and Immunity Children’s Hospital of Chongqing Medical University Chongqing China
| | - Yanping Wang
- Ministry of Education Key Laboratory of Child Development and Disorders Children’s Hospital of Chongqing Medical University Chongqing China
- Chongqing Key Laboratory of Child Infection and Immunity Children’s Hospital of Chongqing Medical University Chongqing China
| | - Zhi Chen
- Ministry of Education Key Laboratory of Child Development and Disorders Children’s Hospital of Chongqing Medical University Chongqing China
- Chongqing Key Laboratory of Child Infection and Immunity Children’s Hospital of Chongqing Medical University Chongqing China
| | - Tao Xu
- Ministry of Education Key Laboratory of Child Development and Disorders Children’s Hospital of Chongqing Medical University Chongqing China
- Chongqing Key Laboratory of Child Infection and Immunity Children’s Hospital of Chongqing Medical University Chongqing China
| | - Lina Zhou
- Ministry of Education Key Laboratory of Child Development and Disorders Children’s Hospital of Chongqing Medical University Chongqing China
- Chongqing Key Laboratory of Child Infection and Immunity Children’s Hospital of Chongqing Medical University Chongqing China
| | - Xuemei Tang
- Division of Rheumatology and Immunology Children’s Hospital of Chongqing Medical University Chongqing China
| | - Yunfei An
- Ministry of Education Key Laboratory of Child Development and Disorders Children’s Hospital of Chongqing Medical University Chongqing China
- Chongqing Key Laboratory of Child Infection and Immunity Children’s Hospital of Chongqing Medical University Chongqing China
- Division of Rheumatology and Immunology Children’s Hospital of Chongqing Medical University Chongqing China
| | - Xiaodong Zhao
- Ministry of Education Key Laboratory of Child Development and Disorders Children’s Hospital of Chongqing Medical University Chongqing China
- Chongqing Key Laboratory of Child Infection and Immunity Children’s Hospital of Chongqing Medical University Chongqing China
- Division of Rheumatology and Immunology Children’s Hospital of Chongqing Medical University Chongqing China
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14
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Karnell JL, Rieder SA, Ettinger R, Kolbeck R. Targeting the CD40-CD40L pathway in autoimmune diseases: Humoral immunity and beyond. Adv Drug Deliv Rev 2019; 141:92-103. [PMID: 30552917 DOI: 10.1016/j.addr.2018.12.005] [Citation(s) in RCA: 177] [Impact Index Per Article: 35.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Revised: 11/12/2018] [Accepted: 12/03/2018] [Indexed: 12/16/2022]
Abstract
CD40 is a TNF receptor superfamily member expressed on both immune and non-immune cells. Interactions between B cell-expressed CD40 and its binding partner, CD40L, predominantly expressed on activated CD4+ T cells, play a critical role in promoting germinal center formation and the production of class-switched antibodies. Non-hematopoietic cells expressing CD40 can also engage CD40L and trigger a pro-inflammatory response. This article will highlight what is known about the biology of the CD40-CD40L axis in humans and describe the potential contribution of CD40 signaling on both hematopoietic and non-hematopoietic cells to autoimmune disease pathogenesis. Additionally, novel therapeutic approaches to target this pathway, currently being evaluated in clinical trials, are discussed.
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15
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Differentiation of Common Variable Immunodeficiency From IgG Deficiency. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2018; 7:1277-1284. [PMID: 30557717 DOI: 10.1016/j.jaip.2018.12.004] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 12/02/2018] [Accepted: 12/03/2018] [Indexed: 12/19/2022]
Abstract
BACKGROUND Common variable immunodeficiency (CVID) and IgG deficiency are 2 of the more prevalent primary humoral immune defects. The former is defined by consensus with criteria for quantitative and qualitative antibody defects, whereas the latter is used to describe patients with reduced IgG, who commonly have recurrent sinopulmonary infections but do not fulfill CVID criteria. However, these patients are often given this diagnosis. OBJECTIVE To compare immunologic findings and clinical manifestations of 2 large cohorts of patients with CVID or IgG deficiency to better delineate differences between these syndromes. METHODS We extracted clinical and laboratory data from electronic medical records of patients at our institution who had received International Classification of Disease codes for either CVID, or IgG deficiency. We gathered immunoglobulin levels, lymphocyte subpopulation counts, and serological vaccine responses. In some patients, we performed flow cytometry to determine percentages of memory and switched-memory B cells. We compiled and statistically compared clinical data related to infectious manifestations, bronchiectasis, autoimmune diseases, infiltrative inflammatory processes, and lymphoid malignancies. RESULTS In contrast to IgG-deficient patients, we found that patients with CVID had lower IgG levels, greater unresponsiveness to most vaccines, lower percentages of memory and isotype switched-memory B cells, and lower CD4 T-cell counts. Clinically, patients with CVID presented similar rates of sinusitis and pneumonias, but a significantly higher prevalence of bronchiectasis and especially noninfectious complications. CONCLUSIONS CVID and IgG deficiency do not share the same disease spectrum, the former being associated with immunodysregulative manifestations and markers of a more severe immune defect. These data may allow clinicians to distinguish these conditions and the management differences that these patients pose.
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16
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Yazdani R, Fekrvand S, Shahkarami S, Azizi G, Moazzami B, Abolhassani H, Aghamohammadi A. The hyper IgM syndromes: Epidemiology, pathogenesis, clinical manifestations, diagnosis and management. Clin Immunol 2018; 198:19-30. [PMID: 30439505 DOI: 10.1016/j.clim.2018.11.007] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2018] [Accepted: 11/11/2018] [Indexed: 12/17/2022]
Abstract
Hyper Immunoglobulin M syndrome (HIGM) is a rare primary immunodeficiency disorder characterized by low or absent levels of serum IgG, IgA, IgE and normal or increased levels of serum IgM. Various X-linked and autosomal recessive/dominant mutations have been reported as the underlying cause of the disease. Based on the underlying genetic defect, the affected patients present a variety of clinical manifestations including pulmonary and gastrointestinal complications, autoimmune disorders, hematologic abnormalities, lymphoproliferation and malignancies which could be controlled by multiple relevant therapeutic approaches. Herein, the epidemiology, pathogenesis, clinical manifestations, diagnosis, management, prognosis and treatment in patients with HIGM syndrome have been reviewed.
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Affiliation(s)
- Reza Yazdani
- Research Center for Immunodeficiencies, Pediatrics Center of Excellence, Children's Medical Center, Tehran University of Medical Science, Tehran, Iran
| | - Saba Fekrvand
- Research Center for Immunodeficiencies, Pediatrics Center of Excellence, Children's Medical Center, Tehran University of Medical Science, Tehran, Iran
| | - Sepideh Shahkarami
- Research Center for Immunodeficiencies, Pediatrics Center of Excellence, Children's Medical Center, Tehran University of Medical Science, Tehran, Iran
| | - Gholamreza Azizi
- Non-Communicable Diseases Research Center, Alborz University of Medical Sciences, Karaj, Iran
| | - Bobak Moazzami
- Research Center for Immunodeficiencies, Pediatrics Center of Excellence, Children's Medical Center, Tehran University of Medical Science, Tehran, Iran
| | - Hassan Abolhassani
- Research Center for Immunodeficiencies, Pediatrics Center of Excellence, Children's Medical Center, Tehran University of Medical Science, Tehran, Iran; Division of Clinical Immunology, Department of Laboratory Medicine, Karolinska Institute at Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Asghar Aghamohammadi
- Research Center for Immunodeficiencies, Pediatrics Center of Excellence, Children's Medical Center, Tehran University of Medical Science, Tehran, Iran.
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17
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T follicular helper cell development and functionality in immune ageing. Clin Sci (Lond) 2018; 132:1925-1935. [PMID: 30185614 DOI: 10.1042/cs20171157] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 07/24/2018] [Accepted: 08/01/2018] [Indexed: 12/15/2022]
Abstract
By 2050, there will be over 1.6 billion adults aged 65 years and older, making age-related diseases and conditions a growing public health concern. One of the leading causes of death in the ageing population is pathogenic infections (e.g. influenza, Streptococcus pneumoniae). This age-dependent susceptibility to infection has been linked to a reduced ability of the ageing immune system to mount protective responses against infectious pathogens, as well as to vaccines against these pathogens. The primary immune response that promotes protection is the production of antibodies by B cells - a response that is directly mediated by T follicular helper (TFH) cells within germinal centers (GCs) in secondary lymphoid tissues. In this review, we will summarize the current knowledge on the development and functionality of TFH cells, the use of circulating TFH (cTFH) cells as vaccine biomarkers, and the influence of age on these processes. Moreover, we will discuss the strategies for overcoming TFH cell dysfunction to improve protective antibody responses in the ageing human population.
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18
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Pereira CTM, Bichuetti-Silva DC, da Mota NVF, Salomão R, Brunialti MKC, Costa-Carvalho BT. B-cell subsets imbalance and reduced expression of CD40 in ataxia-telangiectasia patients. Allergol Immunopathol (Madr) 2018; 46:438-446. [PMID: 29739685 DOI: 10.1016/j.aller.2017.09.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 09/14/2017] [Indexed: 12/31/2022]
Abstract
BACKGROUND Ataxia-telangiectasia (AT) is a well-known primary immunodeficiency with recurrent sinopulmonary infections and variable abnormalities in both the humoral and cellular immune system. Dysfunctions in immunoglobulin production, reduced number of B cells, and B-cell receptor excision circles copies have been reported. We aimed to understand the immunological mechanisms involving the humoral compartment in AT patients by analysing peripheral blood B cells subsets, B-T lymphocyte cooperation through the expression of CD40 and CD40 ligand (CD40L), and cytokines involved in class-switch recombination production. METHODS We compared the proportion of B-cell subsets, the expression of CD40/CD40L, and the plasma levels of IL-6 and IFN-γ of 18 AT patients and 15 healthy age-sex-matched controls using flow cytometry. RESULTS We found that some steps in peripheral B cell development were altered in AT with a pronounced reduction of cell-surface CD40 expression. The proportions of transitional and naïve-mature B cells were reduced, whereas CD21-low, natural effector memory, IgM-only memory, and IgG atypical memory B cells were present in a higher proportion. CONCLUSIONS These findings revealed a disturbed B-cell homeostasis with unconventional maturation of B lymphocyte memory cells, which can explain the consequent impairment of humoral immunity.
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Affiliation(s)
- C T M Pereira
- Department of Pediatrics, Federal University of Sao Paulo Medical School, 598, Botucatu Street, Vila Clementino, São Paulo, SP 04023-062, Brazil
| | - D C Bichuetti-Silva
- Department of Pediatrics, Federal University of Sao Paulo Medical School, 598, Botucatu Street, Vila Clementino, São Paulo, SP 04023-062, Brazil
| | - N V F da Mota
- Division of Infectious Diseases, Federal University of Sao Paulo Medical School, 669, Pedro de Toledo Street, Vila Clementino, São Paulo, SP 04039-032, Brazil
| | - R Salomão
- Division of Infectious Diseases, Federal University of Sao Paulo Medical School, 669, Pedro de Toledo Street, Vila Clementino, São Paulo, SP 04039-032, Brazil
| | - M K C Brunialti
- Division of Infectious Diseases, Federal University of Sao Paulo Medical School, 669, Pedro de Toledo Street, Vila Clementino, São Paulo, SP 04039-032, Brazil
| | - B T Costa-Carvalho
- Department of Pediatrics, Federal University of Sao Paulo Medical School, 598, Botucatu Street, Vila Clementino, São Paulo, SP 04023-062, Brazil.
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19
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Delmonte OM, Fleisher TA. Flow cytometry: Surface markers and beyond. J Allergy Clin Immunol 2018; 143:528-537. [PMID: 30170120 DOI: 10.1016/j.jaci.2018.08.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 08/08/2018] [Accepted: 08/17/2018] [Indexed: 12/20/2022]
Abstract
Flow cytometry is a routinely available laboratory method to study cells in suspension from a variety of human sources. Application of this technology as a clinical laboratory method has evolved from the identification of cell-surface proteins to characterizing intracellular proteins and providing multiple different techniques to assess specific features of adaptive and innate immune function. This expanded menu of flow cytometric testing approaches has increased the utility of this platform in characterizing and diagnosing disorders of immune function.
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Affiliation(s)
- Ottavia M Delmonte
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health (NIH), Bethesda, Md.
| | - Thomas A Fleisher
- Immunology Service, Department of Laboratory Medicine, Clinical Center, NIH, Bethesda, Md
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20
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Darwiche W, Gubler B, Marolleau JP, Ghamlouch H. Chronic Lymphocytic Leukemia B-Cell Normal Cellular Counterpart: Clues From a Functional Perspective. Front Immunol 2018; 9:683. [PMID: 29670635 PMCID: PMC5893869 DOI: 10.3389/fimmu.2018.00683] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Accepted: 03/20/2018] [Indexed: 12/20/2022] Open
Abstract
Chronic lymphocytic leukemia (CLL) is characterized by the clonal expansion of small mature-looking CD19+ CD23+ CD5+ B-cells that accumulate in the blood, bone marrow, and lymphoid organs. To date, no consensus has been reached concerning the normal cellular counterpart of CLL B-cells and several B-cell types have been proposed. CLL B-cells have remarkable phenotypic and gene expression profile homogeneity. In recent years, the molecular and cellular biology of CLL has been enriched by seminal insights that are leading to a better understanding of the natural history of the disease. Immunophenotypic and molecular approaches (including immunoglobulin heavy-chain variable gene mutational status, transcriptional and epigenetic profiling) comparing the normal B-cell subset and CLL B-cells provide some new insights into the normal cellular counterpart. Functional characteristics (including activation requirements and propensity for plasma cell differentiation) of CLL B-cells have now been investigated for 50 years. B-cell subsets differ substantially in terms of their functional features. Analysis of shared functional characteristics may reveal similarities between normal B-cell subsets and CLL B-cells, allowing speculative assignment of a normal cellular counterpart for CLL B-cells. In this review, we summarize current data regarding peripheral B-cell differentiation and human B-cell subsets and suggest possibilities for a normal cellular counterpart based on the functional characteristics of CLL B-cells. However, a definitive normal cellular counterpart cannot be attributed on the basis of the available data. We discuss the functional characteristics required for a cell to be logically considered to be the normal counterpart of CLL B-cells.
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Affiliation(s)
- Walaa Darwiche
- EA 4666 Lymphocyte Normal - Pathologique et Cancers, HEMATIM, Université de Picardie Jules Verne, Amiens, France.,Laboratoire d'Hématologie, Centre Hospitalier Universitaire Amiens-Picardie, Amiens, France
| | - Brigitte Gubler
- EA 4666 Lymphocyte Normal - Pathologique et Cancers, HEMATIM, Université de Picardie Jules Verne, Amiens, France.,Laboratoire d'Oncobiologie Moléculaire, Centre Hospitalier Universitaire Amiens-Picardie, Amiens, France
| | - Jean-Pierre Marolleau
- EA 4666 Lymphocyte Normal - Pathologique et Cancers, HEMATIM, Université de Picardie Jules Verne, Amiens, France.,Service d'Hématologie Clinique et Thérapie cellulaire, Centre Hospitalier Universitaire Amiens-Picardie, Amiens, France
| | - Hussein Ghamlouch
- Institut National de la Santé et de la Recherche Médicale (INSERM) U1170, Gustave Roussy, Villejuif, France.,Institut Gustave Roussy, Villejuif, France.,Université Paris-Sud, Faculté de Médecine, Le Kremlin-Bicêtre, France
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21
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Affiliation(s)
- Tae Jin Kim
- Division of Immunobiology, Sungkyunkwan University School of Medicine, Suwon, Korea
- Department of Health Sciences and Technology, SAIHST, Sungkyunkwan University, Seoul, Korea
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22
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Torabizadeh M, Nabavi M, Zadkarami M, Shahrooei M. X-linked hyper-IgM syndrome associated with pulmonary manifestations: A very rare case of functional mutation in CD40L gene in Iran. Curr Res Transl Med 2018. [PMID: 29525420 DOI: 10.1016/j.retram.2018.02.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Hyper IgM (HIGM) syndromes are a complex of primary immunodeficiency disorders. A 4-years-old boy with recurrent fever and chills, dyspnea, sort throat for a month was admitted to emergency department. In the current case, whole exome sequencing followed by Sanger sequencing were employed in order to screen probable functional mutations. Molecular analysis revealed a functional mutation across the CD40L gene (NM_000074: exon5: c.T464C) resulted in amino acid change p.L155P attributed to X-linked hyper IgM syndrome. The findings of the current study signify the critical role of microbial infection as well as XHIGM screening, particularly in those children cases with respiratory symptoms.
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Affiliation(s)
- Mehdi Torabizadeh
- Golestan Hospital Clinical Research Development Unit, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
| | - Mohammad Nabavi
- Iran University of Medical Sciences, Hazrat-E-Rasool Hospital, Tehran, Iran
| | - Masoud Zadkarami
- Abuzar Children's Hospital, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Mohammad Shahrooei
- Specialized Immunology Laboratory of Dr. Shahrooei, Ahvaz, Iran; Department of Microbiology and Immunology, KU Leuven, Leuven, Belgium
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23
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24
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Flow cytometry-based diagnosis of primary immunodeficiency diseases. Allergol Int 2018; 67:43-54. [PMID: 28684198 DOI: 10.1016/j.alit.2017.06.003] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 05/09/2017] [Accepted: 05/26/2017] [Indexed: 10/19/2022] Open
Abstract
Primary immunodeficiencies (PIDs) are a heterogeneous group of inherited diseases of the immune system. The definite diagnosis of PID is ascertained by genetic analysis; however, this takes time and is costly. Flow cytometry provides a rapid and highly sensitive tool for diagnosis of PIDs. Flow cytometry can evaluate specific cell populations and subpopulations, cell surface, intracellular and intranuclear proteins, biologic effects associated with specific immune defects, and certain functional immune characteristics, each being useful for the diagnosis and evaluation of PIDs. Flow cytometry effectively identifies major forms of PIDs, including severe combined immunodeficiency, X-linked agammaglobulinemia, hyper IgM syndromes, Wiskott-Aldrich syndrome, X-linked lymphoproliferative syndrome, familial hemophagocytic lymphohistiocytosis, autoimmune lymphoproliferative syndrome, IPEX syndrome, CTLA 4 haploinsufficiency and LRBA deficiency, IRAK4 and MyD88 deficiencies, Mendelian susceptibility to mycobacterial disease, chronic mucocuneous candidiasis, and chronic granulomatous disease. While genetic analysis is the definitive approach to establish specific diagnoses of PIDs, flow cytometry provides a tool to effectively evaluate patients with PIDs at relatively low cost.
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25
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Heusinkveld LE, Yim E, Yang A, Azani AB, Liu Q, Gao JL, McDermott DH, Murphy PM. Pathogenesis, diagnosis and therapeutic strategies in WHIM syndrome immunodeficiency. Expert Opin Orphan Drugs 2017; 5:813-825. [PMID: 29057173 DOI: 10.1080/21678707.2017.1375403] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
21 INTRODUCTION WHIM syndrome is a rare combined primary immunodeficiency disorder caused by autosomal dominant gain-of-function mutations in the chemokine receptor CXCR4. It is the only Mendelian condition known to be caused by mutation of a chemokine or chemokine receptor. As such, it provides a scientific opportunity to understand chemokine-dependent immunoregulation in humans and a medical opportunity to develop mechanism-based treatment and cure strategies. 22 AREAS COVERED This review covers the clinical features, genetics, immunopathogenesis and clinical management of WHIM syndrome. Clinical trials of targeted therapeutic agents and potential cure strategies are also included. 23 EXPERT OPINION WHIM syndrome may be particularly amenable to mechanism-based therapeutics for three reasons: 1) CXCR4 has been validated as the molecular target in the disease by Mendelian genetics; 2) the biochemical abnormality is excessive CXCR4 signaling; and 3) antagonists selective for CXCR4 have been developed. Plerixafor is FDA-approved for hematopoietic stem cell (HSC) mobilization and has shown preliminary safety and efficacy in phase I clinical trials in WHIM syndrome. Gene editing may represent a viable cure strategy, since chromothriptic deletion of the disease allele in HSCs resulted in clinical cure of a patient and because CXCR4 haploinsufficiency enhances engraftment of transplanted HSCs in mice.
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Affiliation(s)
- Lauren E Heusinkveld
- Laboratory of Molecular Immunology, Bldg 10, Room 11N113, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - Erin Yim
- Laboratory of Molecular Immunology, Bldg 10, Room 11N113, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - Alexander Yang
- Laboratory of Molecular Immunology, Bldg 10, Room 11N113, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - Ari B Azani
- Laboratory of Molecular Immunology, Bldg 10, Room 11N113, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - Qian Liu
- Laboratory of Molecular Immunology, Bldg 10, Room 11N113, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - Ji-Liang Gao
- Laboratory of Molecular Immunology, Bldg 10, Room 11N113, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - David H McDermott
- Laboratory of Molecular Immunology, Bldg 10, Room 11N113, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - Philip M Murphy
- Laboratory of Molecular Immunology, Bldg 10, Room 11N113, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
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Perkins T, Rosenberg JM, Le Coz C, Alaimo JT, Trofa M, Mullegama SV, Antaya RJ, Jyonouchi S, Elsea SH, Utz PJ, Meffre E, Romberg N. Smith-Magenis Syndrome Patients Often Display Antibody Deficiency but Not Other Immune Pathologies. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY. IN PRACTICE 2017; 5:1344-1350.e3. [PMID: 28286158 PMCID: PMC5591748 DOI: 10.1016/j.jaip.2017.01.028] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 01/03/2017] [Accepted: 01/21/2017] [Indexed: 01/01/2023]
Abstract
BACKGROUND Smith-Magenis syndrome (SMS) is a complex neurobehavioral disorder associated with recurrent otitis. Most SMS cases result from heterozygous interstitial chromosome 17p11.2 deletions that encompass not only the intellectual disability gene retinoic acid-induced 1 but also other genes associated with immunodeficiency, autoimmunity, and/or malignancy. OBJECTIVES The goals of this study were to describe the immunological consequence of 17p11.2 deletions by determining the prevalence of immunological diseases in subjects with SMS and by assessing their immune systems via laboratory methods. METHODS We assessed clinical histories of 76 subjects with SMS with heterozygous 17p11.2 deletions and performed in-depth immunological testing on 25 representative cohort members. Laboratory testing included determination of serum antibody concentrations, vaccine titers, and lymphocyte subset frequencies. Detailed reactivity profiles of SMS serum antibodies were performed using custom-made antigen microarrays. RESULTS Of 76 subjects with SMS, 74 reported recurrent infections including otitis (88%), pneumonia (47%), sinusitis (42%), and gastroenteritis (34%). Infections were associated with worsening SMS-related neurobehavioral symptoms. The prevalence of autoimmune and atopic diseases was not increased. Malignancy was not reported. Laboratory evaluation revealed most subjects with SMS to be deficient of isotype-switched memory B cells and many to lack protective antipneumococcal antibodies. SMS antibodies were not more reactive than control antibodies to self-antigens. CONCLUSIONS Patients with SMS with heterozygous 17p.11.2 deletions display an increased susceptibility to sinopulmonary infections, but not to autoimmune, allergic, or malignant diseases. SMS sera display an antibody reactivity profile favoring neither recognition of pathogen-associated antigens nor self-antigens. Prophylactic strategies to prevent infections may also provide neurobehavioral benefits to selected patients with SMS.
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Affiliation(s)
- Tiffany Perkins
- Department of Pediatrics, Yale University School of Medicine, New Haven, Conn
| | - Jacob M Rosenberg
- Division of Immunology and Rheumatology, Department of Medicine, Stanford University School of Medicine, Stanford, Calif
| | - Carole Le Coz
- Division of Allergy Immunology, Department of Pediatrics, The Children's Hospital of Philadelphia, Philadelphia, Penn
| | - Joseph T Alaimo
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Tex
| | - Melissa Trofa
- Division of Allergy Immunology, Department of Pediatrics, The Children's Hospital of Philadelphia, Philadelphia, Penn
| | - Sureni V Mullegama
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Tex
| | - Richard J Antaya
- Department of Pediatrics, Yale University School of Medicine, New Haven, Conn; Department of Dermatology, Yale University School of Medicine, New Haven, Conn
| | - Soma Jyonouchi
- Division of Allergy Immunology, Department of Pediatrics, The Children's Hospital of Philadelphia, Philadelphia, Penn
| | - Sarah H Elsea
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Tex
| | - Paul J Utz
- Division of Immunology and Rheumatology, Department of Medicine, Stanford University School of Medicine, Stanford, Calif; Institute for Immunity, Transplantation, and Infection, Stanford University School of Medicine, Stanford, Calif
| | - Eric Meffre
- Department of Immunobiology, Yale University School of Medicine, New Haven, Conn; Department of Internal Medicine, Yale University School of Medicine, New Haven, Conn
| | - Neil Romberg
- Division of Allergy Immunology, Department of Pediatrics, The Children's Hospital of Philadelphia, Philadelphia, Penn.
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Berrón-Ruíz L, López-Herrera G, Ávalos-Martínez CE, Valenzuela-Ponce C, Ramírez-SanJuan E, Santoyo-Sánchez G, Mújica Guzmán F, Espinosa-Rosales FJ, Santos-Argumedo L. Variations of B cell subpopulations in peripheral blood of healthy Mexican population according to age: Relevance for diagnosis of primary immunodeficiencies. Allergol Immunopathol (Madr) 2016; 44:571-579. [PMID: 27780620 DOI: 10.1016/j.aller.2016.05.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 04/25/2016] [Accepted: 05/04/2016] [Indexed: 11/28/2022]
Abstract
BACKGROUND Peripheral blood B cells include lymphocytes at various stages of differentiation, each with a specific function in the immune response. All these stages show variations in percentage and absolute number throughout human life. The numbers and proportions of B subpopulation are influenced by factors such as gender, age, ethnicity, and lifestyle. This study establishes reference values according to age of peripheral blood B cell subtypes in healthy Mexican population. METHODS Peripheral blood from healthy new-borns and adults were analysed for total B cell subpopulations, using surface markers such as CD19, IgM, IgD, CD21, CD24, CD27, and CD38, to identify naïve, memory with and without isotype switch, double-negative, transitional, and plasmablast cells. RESULTS We observed a significant variation in terms of frequency and absolute counts between all groups analysed. Values from each B cell subpopulation show variations according to age. CONCLUSIONS In order to attempt to elucidate reference values for B cell subpopulation, the present study evaluated a population sample of healthy blood donors from this region. Values reported here can also be used as a tool for diagnosis of diseases in which B cell maturation is affected.
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Affiliation(s)
- L Berrón-Ruíz
- Departamento de Biomedicina Molecular, Centro de Investigación y de Estudios Avanzados-IPN, México, D.F., Mexico; Unidad de Investigación en Inmunodeficiencias, Instituto Nacional de Pediatría-SSa, México, D.F., Mexico
| | - G López-Herrera
- Unidad de Investigación en Inmunodeficiencias, Instituto Nacional de Pediatría-SSa, México, D.F., Mexico
| | - C E Ávalos-Martínez
- Laboratorio de Inmunoquímica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, México, D.F., Mexico
| | - C Valenzuela-Ponce
- Departamento de Biomedicina Molecular, Centro de Investigación y de Estudios Avanzados-IPN, México, D.F., Mexico
| | - E Ramírez-SanJuan
- Laboratorio de Farmacología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, México, D.F., Mexico
| | - G Santoyo-Sánchez
- Programa de Posgrado en Ciencias Médicas, Odontológicas y de la Salud, Universidad Nacional Autónoma de México, México, D.F., Mexico
| | - F Mújica Guzmán
- Laboratorio de Hematología, Instituto Nacional de Pediatría-SSa, México, D.F., Mexico
| | - F J Espinosa-Rosales
- Unidad de Investigación en Inmunodeficiencias, Instituto Nacional de Pediatría-SSa, México, D.F., Mexico
| | - L Santos-Argumedo
- Departamento de Biomedicina Molecular, Centro de Investigación y de Estudios Avanzados-IPN, México, D.F., Mexico.
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Dörner T, Lipsky PE. Correlation of circulating CD27high plasma cells and disease activity in systemic lupus erythematosus. Lupus 2016; 13:283-9. [PMID: 15230280 DOI: 10.1191/0961203304lu1014oa] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
CD27 is a useful marker in assessing the number of circulating B cells and B cell subsets because it permits one step identification of the major B cell compartments, CD27- naïve and CD27+ memory B cells as well as CD27high plasma cells. Abnormalities in the distributionof CD27+ B cell subsets are useful in assessing disease activity in patients with systemic lupus erythematosus(SLE). In particular, the frequencyof CD27high plasma cells significantly correlates with lupus activity in both children and adults with SLE. Conventional immunosuppressive therapies affect the number of CD27- naive B cells and CD27high plasma cells, but do not target CD27+ memory B cells. These results suggest that disease flares may relate to the retention of CD27+ memory B cells after conventional immunosuppressive therapy and that new therapies that target these cells specifically may offer new opportunities to induce remission in SLE.
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Affiliation(s)
- T Dörner
- Department of Medicine, Charité University Medicine, Berlin.
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29
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X-linked Hyper IgM Syndrome Presenting as Pulmonary Alveolar Proteinosis. J Clin Immunol 2016; 36:564-70. [PMID: 27324886 DOI: 10.1007/s10875-016-0307-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 06/03/2016] [Indexed: 02/02/2023]
Abstract
PURPOSE X-linked hyper IgM syndrome (XHIGM) is a combined immunodeficiency caused by mutations in the CD40 ligand (CD40L) gene that typically results in decreased or absent CD40L expression on activated T cells, leading to defective class switching and somatic hypermutation. We describe an infant who presented with respiratory failure due to pulmonary alveolar proteinosis (PAP) with a novel damaging missense mutation in the CD40L gene. METHODS Whole exome sequencing (WES) was used to identify a mutation in the CD40L gene. CD40L expression and function were determined by flow cytometry. RESULTS A 5-month-old previously-healthy male presented with respiratory failure and diffuse pulmonary ground glass opacities on CT scan of the chest. Laboratory evaluation revealed an undetectable IgG, normal IgA, and elevated IgM. A bronchoalveolar lavage demonstrated pulmonary alveolar proteinosis. WES demonstrated a c.608G > C mutation in the CD40L gene resulting in p.R203T. Flow cytometry demonstrated normal CD40L expression on activated T cells but absent binding of CD40-Ig to CD40L on activated patient T cells. CONCLUSIONS The clinical manifestations of XHIGM in our patient had several unique features, including the presentation with PAP, normal serum IgA, and expression of non-functional CD40L on activated T cells. To our knowledge, this is the first published case of PAP in a patient with XHIGM.
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30
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Human T Follicular Helper Cells in Primary Immunodeficiency: Quality Just as Important as Quantity. J Clin Immunol 2016; 36 Suppl 1:40-7. [PMID: 26961358 DOI: 10.1007/s10875-016-0257-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 02/28/2016] [Indexed: 12/24/2022]
Abstract
T follicular helper (Tfh) cells are a subset of effector CD4(+) T cells specialised to induce Ab production by B cells. This review highlights some of the recent advances in the field of human Tfh cells that have come from the study of primary immunodeficiencies. In particular it is increasingly evident that the quality of the Tfh cells that are generated, is just as important as the quantity.
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31
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Abstract
The success of most vaccines relies on the generation of antibodies to provide protection against subsequent infection; this in turn depends on a robust germinal centre (GC) response that culminates in the production of long-lived antibody-secreting plasma cells. The size and quality of the GC response are directed by a specialised subset of CD4
+ T cells: T follicular helper (Tfh) cells. Tfh cells provide growth and differentiation signals to GC B cells and mediate positive selection of high-affinity B cell clones in the GC, thereby determining which B cells exit the GC as plasma cells and memory B cells. Because of their central role in the production of long-lasting humoral immunity, Tfh cells represent an interesting target for rational vaccine design.
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Affiliation(s)
- Michelle A Linterman
- Laboratory of Lymphocyte Signalling and Development, Babraham Institute, Cambridge, CB22 3AT, UK
| | - Danika L Hill
- Laboratory of Lymphocyte Signalling and Development, Babraham Institute, Cambridge, CB22 3AT, UK
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32
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Low marginal zone-like B lymphocytes and natural antibodies characterize skewed B-lymphocyte subpopulations in del22q11 DiGeorge patients. Clin Immunol 2015; 161:144-9. [DOI: 10.1016/j.clim.2015.08.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 08/23/2015] [Accepted: 08/25/2015] [Indexed: 12/11/2022]
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33
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Nera KP, Kyläniemi MK, Lassila O. Regulation of B Cell to Plasma Cell Transition within the Follicular B Cell Response. Scand J Immunol 2015; 82:225-34. [PMID: 26118840 DOI: 10.1111/sji.12336] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 06/23/2015] [Indexed: 12/11/2022]
Abstract
Persistent humoral immunity depends on the follicular B cell response and on the generation of somatically mutated high-affinity plasma cells and memory B cells. Upon activation by an antigen, cognately activated follicular B cells and follicular T helper (TFH ) cells initiate germinal centre (GC) reaction during which high-affinity effector cells are generated. The differentiation of activated follicular B cells into plasma cells and memory B cells is guided by complex selection events, both at the cellular and molecular level. The transition of B cell into a plasma cell during the GC response involves alterations in the microenvironment and developmental state of the cell, which are guided by cell-extrinsic signals. The developmental cell fate decisions in response to these signals are coordinated by cell-intrinsic gene regulatory network functioning at epigenetic, transcriptional and post-transcriptional levels.
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Affiliation(s)
- K-P Nera
- Department of Medical Microbiology and Immunology, University of Turku, Turku, Finland
| | - M K Kyläniemi
- Department of Medical Microbiology and Immunology, University of Turku, Turku, Finland
| | - O Lassila
- Department of Medical Microbiology and Immunology, University of Turku, Turku, Finland
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Bemark M. Translating transitions - how to decipher peripheral human B cell development. J Biomed Res 2015; 29:264-84. [PMID: 26243514 PMCID: PMC4547376 DOI: 10.7555/jbr.29.20150035] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Accepted: 02/10/2015] [Indexed: 01/05/2023] Open
Abstract
During the last two decades our understanding of human B cell differentiation has developed considerably. Our understanding of the human B cell compartment has advanced from a point where essentially all assays were based on the presence or not of class-switched antibodies to a level where a substantial diversity is appreciated among the cells involved. Several consecutive transitional stages that newly formed IgM expressing B cells go through after they leave the bone marrow, but before they are fully mature, have been described, and a significant complexity is also acknowledged within the IgM expressing and class-switched memory B cell compartments. It is possible to isolate plasma blasts in blood to follow the formation of plasma cells during immune responses, and the importance and uniqueness of the mucosal IgA system is now much more appreciated. Current data suggest the presence of at least one lineage of human innate-like B cells akin to B1 and/or marginal zone B cells in mice. In addition, regulatory B cells with the ability to produce IL-10 have been identified. Clinically, B cell depletion therapy is used for a broad range of conditions. The ability to define different human B cell subtypes using flow cytometry has therefore started to come into clinical use, but as our understanding of human B cell development further progresses, B cell subtype analysis will be of increasing importance in diagnosis, to measure the effect of immune therapy and to understand the underlying causes for diseases. In this review the diversity of human B cells will be discussed, with special focus on current data regarding their phenotypes and functions.
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Affiliation(s)
- Mats Bemark
- Department of Clinical Immunology and Transfusion Medicine, Sahlgrenska University hospital, SE 413 45 Gothenburg, Sweden.,Mucosal Immunobiology and Vaccine Center (MIVAC), Department of Microbiology and Immunology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, SE 405 30 Gothenburg, Sweden.
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35
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Vockerodt M, Yap LF, Shannon-Lowe C, Curley H, Wei W, Vrzalikova K, Murray PG. The Epstein-Barr virus and the pathogenesis of lymphoma. J Pathol 2015; 235:312-22. [PMID: 25294567 DOI: 10.1002/path.4459] [Citation(s) in RCA: 163] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 10/01/2014] [Accepted: 10/05/2014] [Indexed: 02/06/2023]
Abstract
Since the discovery in 1964 of the Epstein-Barr virus (EBV) in African Burkitt lymphoma, this virus has been associated with a remarkably diverse range of cancer types. Because EBV persists in the B cells of the asymptomatic host, it can easily be envisaged how it contributes to the development of B-cell lymphomas. However, EBV is also found in other cancers, including T-cell/natural killer cell lymphomas and several epithelial malignancies. Explaining the aetiological role of EBV is challenging, partly because the virus probably contributes differently to each tumour and partly because the available disease models cannot adequately recapitulate the subtle variations in the virus-host balance that exist between the different EBV-associated cancers. A further challenge is to identify the co-factors involved; because most persistently infected individuals will never develop an EBV-associated cancer, the virus cannot be working alone. This article will review what is known about the contribution of EBV to lymphoma development.
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Affiliation(s)
- Martina Vockerodt
- Centre for Human Virology and the School of Cancer Sciences, University of Birmingham, Birmingham, UK
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Datta K, Subramaniam KS. Host Defense Against Cryptococcal Disease: Is There a Role for B Cells and Antibody-Mediated Immunity? CURRENT FUNGAL INFECTION REPORTS 2014. [DOI: 10.1007/s12281-014-0208-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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37
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Ghamlouch H, Ouled-Haddou H, Guyart A, Regnier A, Trudel S, Claisse JF, Fuentes V, Royer B, Marolleau JP, Gubler B. TLR9 Ligand (CpG Oligodeoxynucleotide) Induces CLL B-Cells to Differentiate into CD20(+) Antibody-Secreting Cells. Front Immunol 2014; 5:292. [PMID: 24982661 PMCID: PMC4058906 DOI: 10.3389/fimmu.2014.00292] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Accepted: 06/03/2014] [Indexed: 12/22/2022] Open
Abstract
B-cell chronic lymphocytic leukemia (CLL) is the most frequent adult leukemia in the Western world. It is a heterogeneous disease characterized by clonal proliferation and the accumulation of CD5+ mature B lymphocytes. However, the normal counterpart from which the latter cells arise has not yet been identified. CD27 expression and gene expression profiling data suggest that CLL cells are related to memory B-cells. In vitro, memory B-cells differentiate into plasma cells when stimulated with CpG oligodeoxynucleotide (CpG). The objective of the present study was therefore to investigate the ability of CpG, in the context of CD40 ligation, to induce the differentiation of CLL B-cells into antibody-secreting cells (ASCs). CD20+CD38− CLL B-cells were stimulated with a combination of CpG, CD40 ligand and cytokines (CpG/CD40L/c) in a two-step, 7-day culture system. We found that the CpG/CD40L/c culture system prompted CLL B-cells to differentiate into CD19+CD20+CD27+CD38−ASCs. These cells secreted large amounts of IgM and had the same shape as plasma cells. However, only IgMs secreted by ASCs that had differentiated from unmutated CLL B-cells were poly/autoreactive. Class-switch recombination (CSR) to IgG and IgA was detected in cells expressing the activation-induced cytidine deaminase gene (AICDA). Although these ASCs expressed high levels of the transcription factors PRDM1 (BLIMP1), IRF4, and XBP1s, they did not downregulate expression of PAX5. Our results suggest that CLL B-cells can differentiate into ASCs, undergo CSR and produce poly/autoreactive antibodies. Furthermore, our findings may be relevant for (i) identifying the normal counterpart of CLL B-cells and (ii) developing novel treatment strategies in CLL.
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Affiliation(s)
- Hussein Ghamlouch
- EA4666, Department of Immunology, Université de Picardie Jules Verne , Amiens , France
| | - Hakim Ouled-Haddou
- EA4666, Department of Immunology, Université de Picardie Jules Verne , Amiens , France
| | - Aude Guyart
- EA4666, Department of Immunology, Université de Picardie Jules Verne , Amiens , France
| | - Aline Regnier
- EA4666, Department of Immunology, Université de Picardie Jules Verne , Amiens , France ; Service d'Hématologie Clinique et Thérapie Cellulaire, Department of Hematology, Centre Hospitalier Régional Universitaire d'Amiens , Amiens , France
| | - Stéphanie Trudel
- EA4666, Department of Immunology, Université de Picardie Jules Verne , Amiens , France ; Laboratoire d'Oncobiologie Moléculaire, Department of Molecular Oncobiology, Centre Hospitalier Régional Universitaire d'Amiens , Amiens , France
| | - Jean-François Claisse
- Service d'Hématologie Clinique et Thérapie Cellulaire, Department of Hematology, Centre Hospitalier Régional Universitaire d'Amiens , Amiens , France
| | - Vincent Fuentes
- EA4666, Department of Immunology, Université de Picardie Jules Verne , Amiens , France
| | - Bruno Royer
- EA4666, Department of Immunology, Université de Picardie Jules Verne , Amiens , France ; Service d'Hématologie Clinique et Thérapie Cellulaire, Department of Hematology, Centre Hospitalier Régional Universitaire d'Amiens , Amiens , France
| | - Jean-Pierre Marolleau
- EA4666, Department of Immunology, Université de Picardie Jules Verne , Amiens , France ; Service d'Hématologie Clinique et Thérapie Cellulaire, Department of Hematology, Centre Hospitalier Régional Universitaire d'Amiens , Amiens , France
| | - Brigitte Gubler
- EA4666, Department of Immunology, Université de Picardie Jules Verne , Amiens , France ; Laboratoire d'Oncobiologie Moléculaire, Department of Molecular Oncobiology, Centre Hospitalier Régional Universitaire d'Amiens , Amiens , France
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Tfh Cell Differentiation and Their Function in Promoting B-Cell Responses. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2014; 841:153-80. [DOI: 10.1007/978-94-017-9487-9_6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Tellier J, Nutt SL. The unique features of follicular T cell subsets. Cell Mol Life Sci 2013; 70:4771-84. [PMID: 23852544 PMCID: PMC11113495 DOI: 10.1007/s00018-013-1420-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Revised: 06/25/2013] [Accepted: 06/28/2013] [Indexed: 12/18/2022]
Abstract
The germinal center (GC) reaction is critical for humoral immunity, but also contributes adversely to a variety of autoimmune diseases. While the major protective function of GCs is mediated by plasma cells and memory B cells, follicular helper T (TFH) cells represent a specialized T cell subset that provides essential help to the antigen-specific B cells in the form of membrane-bound ligands and secreted factors such as IL-21. Recent studies have revealed that TFH cells are capable of considerable functional diversity as well as possessing the ability to form memory cells. The molecular basis of this plasticity and heterogeneity is only now emerging. It has also become apparent that several other populations of follicular T cells exist, including natural killer T cells and regulatory T cells. In this review we will discuss the function of follicular T cells and interaction of these populations within the GC response.
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Affiliation(s)
- Julie Tellier
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, Melbourne, VIC, 3052, Australia,
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40
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Control of TFH cell numbers: why and how? Immunol Cell Biol 2013; 92:40-8. [DOI: 10.1038/icb.2013.69] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Revised: 10/08/2013] [Accepted: 10/09/2013] [Indexed: 12/22/2022]
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Jolles S. The variable in common variable immunodeficiency: a disease of complex phenotypes. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2013; 1:545-56; quiz 557. [PMID: 24565700 DOI: 10.1016/j.jaip.2013.09.015] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2013] [Revised: 09/26/2013] [Accepted: 09/27/2013] [Indexed: 11/16/2022]
Abstract
Common variable immunodeficiency (CVID) is the most common and clinically most important severe primary antibody deficiency and is characterized by low levels of IgG, IgA, and/or IgM, with a failure to produce specific antibodies. This diagnostic category represents a heterogeneous group of disorders, which present not only with acute and chronic infections but also with a range of inflammatory and autoimmune disorders as well as an increased incidence of lymphoma and other malignancies. Patients can now be categorized into distinct clinical phenotypes based on analysis of large cohort studies and be further stratified by immunologic laboratory testing. The biologic importance of this categorization is made clear by the 11-fold increase in mortality if even one of these phenotypes (cytopenias, lymphoproliferation, or enteropathy) is present. Limited progress in defining the underlying molecular causes has been made with known causative single gene defects accounting for only 3% of cases, and, for this and the reasons mentioned above, CVID remains resolute in its variability. This review provides a practical approach to risk stratification of these complex phenotypes by using current clinical categories and laboratory biomarkers. The effects of infection as well as inflammatory and autoimmune complications on different organ systems are discussed alongside strategies to reduce diagnostic delay. Recent developments in diagnostics and therapy are also explored.
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Affiliation(s)
- Stephen Jolles
- Department of Immunology, University Hospital of Wales, Heath Park, Cardiff, United Kingdom.
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Yeramilli VA, Knight KL. Development of CD27+ marginal zone B cells requires GALT. Eur J Immunol 2013; 43:1484-8. [PMID: 23468368 DOI: 10.1002/eji.201243205] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 01/31/2013] [Accepted: 03/01/2013] [Indexed: 12/31/2022]
Abstract
In species other than mouse, little is known about the origin and development of marginal zone (MZ) B cells. Using cross-reactive antibodies, we identified and characterized splenic MZ B cells in rabbits as CD27(+) CD23(-). In rabbits in which organized gut-associated lymphoid tissue (GALT) was surgically removed at birth, we found only CD23(+) follicular (FO) B cells and almost no CD27(+) MZ B cells in the spleen, indicating that GALT is required for the development of splenic MZ B cells. These findings lead us to suggest that commensal microbiota contribute to the development of MZ B cells.
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Affiliation(s)
- Venkata A Yeramilli
- Department of Microbiology and Immunology, Loyola University, Chicago, IL, USA
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Leiva LE, Monjure H, Sorensen RU. Recurrent respiratory infections, specific antibody deficiencies, and memory B cells. J Clin Immunol 2012; 33 Suppl 1:S57-61. [PMID: 23093309 DOI: 10.1007/s10875-012-9814-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2012] [Accepted: 09/26/2012] [Indexed: 10/27/2022]
Abstract
OBJECTIVES To investigate the immunological phenotypes detected in children with recurrent upper and lower respiratory infections that have normal total immunoglobulin concentrations. METHODS A cohort of over 60 children with recurrent respiration infections was evaluated for specific antibody deficiencies (SAD) and for memory B-cell abnormalities. A control group of children without recurrent infections was also evaluated. Evaluation included a detailed history of immunizations with pneumococcal vaccines; determination of IgM, IgG, IgA, and IgE concentrations; measurement of anti-pneumococcal polysaccharide antibody levels by ELISA and expression of CD27, IgD, and IgM on peripheral CD19(+)B cells by flow cytometry to determine the proportions of naive, IgM-memory B cells, and class-switched memory B cells. RESULTS Patients were classified as having a SAD to either pure polysaccharides (PPV-SAD) or to conjugate polysaccharides (PCV-SAD) based on the number of polysaccharides to which they developed an adequate antibody response. A normal response to only 2 or fewer of 7 PCV or PPV serotypes was considered as evidence of SAD. Forty-one patients without SAD and 26 with SAD were identified. IgM-memory B cells were low in 3 of 41 patients without SAD; in 3 of 5 PPV-SAD patients; and in 10 of 21 PCV-SAD patients. Class-switched memory B cells were low in 19 of 41 patients without SAD; in all 5 patients with PPV-SAD; and in 11 of 21PCV-SAD patients. CONCLUSIONS Patients with recurrent infection with or without SAD may have low IgM- and/or class-switched memory B cells. Ongoing research aims to determine the prognostic implications of these differences in patients with SAD.
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Affiliation(s)
- Lily E Leiva
- Department of Pediatrics, Allergy/Immunology Division, Louisiana State University Health Sciences Center, Jeffrey Modell Diagnostic Center for Primary Immunodeficiencies and Children's Hospital, 200 Henry Clay Avenue, New Orleans, LA 70118, USA.
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Tsai HY, Yu HH, Chien YH, Chu KH, Lau YL, Lee JH, Wang LC, Chiang BL, Yang YH. X-linked hyper-IgM syndrome with CD40LG mutation: two case reports and literature review in Taiwanese patients. JOURNAL OF MICROBIOLOGY, IMMUNOLOGY, AND INFECTION = WEI MIAN YU GAN RAN ZA ZHI 2012; 48:113-8. [PMID: 23010537 DOI: 10.1016/j.jmii.2012.07.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2011] [Revised: 05/16/2012] [Accepted: 07/09/2012] [Indexed: 10/27/2022]
Abstract
Hyper-IgM syndrome (HIGM) is a rare primary immunodeficiency disorder characterized by elevated or normal serum IgM and decreased IgG, IgA, and IgE due to defective immunoglobulin class switching. X-linked HIGM (XHIGM, HIGM1) is the most frequent type, is caused by mutations in the CD40 ligand gene, and is regarded as a combined T and B immunodeficiency. We report an 18-year-old male who was diagnosed initially with hypogammaglobulinemia in infancy, but developed repeated pneumonia, sepsis, cellulitis, perianal abscess, pericarditis, and bronchiectasis despite regular intravenous immunoglobulin replacement therapy. The patient died at age 18 years due to pneumonia and tension pneumothorax. Mutation analysis revealed CD40L gene mutation within Exon 5 at nucleotide position 476 (cDNA 476G > A). This nonsense mutation predicted a tryptophan codon (TGG) change to a stop codon (TGA) at position 140 (W140X), preventing CD40L protein expression. Sequence analysis in the family confirmed a de novo mutation. The second case of 6-month-old male infant presented as Pneumocystis jiroveci pneumonia and acute respiratory distress syndrome. Gene analysis of the CD40L gene revealed G to C substitution in Intron 4 (c.409 + 5G > C) and mother was a carrier. Hematopoietic stem cell transplantation, the only cure for XHIGM, was arranged in the second case.
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Affiliation(s)
- Hu-Yuan Tsai
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan
| | - Hsin-Hui Yu
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan
| | - Yin-Hsiu Chien
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan
| | - Kuan-Hua Chu
- Graduate Institute of Immunology, National Taiwan University, Taipei, Taiwan
| | - Yu-Lung Lau
- Department of Pediatrics and Adolescent Medicine, The University of Hong Kong, SAR, China
| | - Jyh-Hong Lee
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan
| | - Li-Chieh Wang
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan
| | - Bor-Luen Chiang
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan
| | - Yao-Hsu Yang
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan.
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Casadevall A, Pirofski LA. Immunoglobulins in defense, pathogenesis, and therapy of fungal diseases. Cell Host Microbe 2012; 11:447-56. [PMID: 22607798 DOI: 10.1016/j.chom.2012.04.004] [Citation(s) in RCA: 115] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Only two decades ago antibodies to fungi were thought to have little or no role in protection against fungal diseases. However, subsequent research has provided convincing evidence that certain antibodies can modify the course of fungal infection to the benefit or detriment of the host. Hybridoma technology was the breakthrough that enabled the characterization of antibodies to fungi, illuminating some of the requirements for antibody efficacy. As discussed in this review, fungal-specific antibodies mediate protection through direct actions on fungal cells and through classical mechanisms such as phagocytosis and complement activation. Although mechanisms of antibody-mediated protection are often species-specific, numerous fungal antigens can be targeted to generate vaccines and therapeutic immunoglobulins. Furthermore, the study of antibody function against medically important fungi has provided fresh immunological insights into the complexity of humoral immunity that are likely to apply to other pathogens.
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Affiliation(s)
- Arturo Casadevall
- Department of Microbiology and Immunology and Medicine, Albert Einstein College of Medicine, Bronx, NY 10461, USA.
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Abstract
Immunoglobulin class-switch recombination deficiencies (Ig-CSR-Ds) are rare primary immunodeficiencies characterized by defective switched isotype (IgG/IgA/IgE) production. Depending on the molecular defect in question, the Ig-CSR-D may be combined with an impairment in somatic hypermutation (SHM). Some of the mechanisms underlying Ig-CSR and SHM have been described by studying natural mutants in humans. This approach has revealed that T cell-B cell interaction (resulting in CD40-mediated signaling), intrinsic B-cell mechanisms (activation-induced cytidine deaminase-induced DNA damage), and complex DNA repair machineries (including uracil-N-glycosylase and mismatch repair pathways) are all involved in class-switch recombination and SHM. However, several of the mechanisms required for full antibody maturation have yet to be defined. Elucidation of the molecular defects underlying the diverse set of Ig-CSR-Ds is essential for understanding Ig diversification and has prompted better definition of the clinical spectrum of diseases and the development of increasingly accurate diagnostic and therapeutic approaches.
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Chronic hepatitis C virus infection breaks tolerance and drives polyclonal expansion of autoreactive B cells. CLINICAL AND VACCINE IMMUNOLOGY : CVI 2012; 19:1027-37. [PMID: 22623650 DOI: 10.1128/cvi.00194-12] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Chronic Hepatitis C virus (HCV) infection has been linked with B cell lymphoproliferative disorders and several autoimmune-related diseases. The mechanisms of how chronic viral infection affects B cell development and predisposes the patients to autoimmune manifestations are poorly understood. In this study, we established an experimental system to probe the B cell responses and characterize the antibodies from chronic-HCV-infected individuals. We identified an unusual polyclonal expansion of the IgM memory B cell subset in some patients. This B cell subset is known to be tightly regulated, and autoreactive cells are eliminated by tolerance mechanisms. Genetic analysis of the immunoglobulin (Ig) heavy chain variable gene (V(H)) sequences of the expanded cell population showed that the levels of somatic hypermutation (SHM) correlate with the extent of cell expansion in the patients and that the V(H) genes exhibit signs of antigen-mediated selection. Functional analysis of the cloned B cell receptors demonstrated autoreactivity in some of the expanded IgM memory B cells in the patients which is not found in healthy donors. In summary, this study demonstrated that, in some patients, chronic HCV infection disrupts the tolerance mechanism that normally deletes autoreactive B cells, therefore increasing the risk of developing autoimmune antibodies. Long-term follow-up of this expanded B cell subset within the infected individuals will help determine whether these cells are predictors of more-serious clinical manifestations.
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Epstein-Barr virus infection of naïve B cells in vitro frequently selects clones with mutated immunoglobulin genotypes: implications for virus biology. PLoS Pathog 2012; 8:e1002697. [PMID: 22589726 PMCID: PMC3349760 DOI: 10.1371/journal.ppat.1002697] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2011] [Accepted: 03/27/2012] [Indexed: 12/17/2022] Open
Abstract
Epstein-Barr virus (EBV), a lymphomagenic human herpesvirus, colonises the host through polyclonal B cell-growth-transforming infections yet establishes persistence only in IgD+ CD27+ non-switched memory (NSM) and IgD− CD27+ switched memory (SM) B cells, not in IgD+ CD27− naïve (N) cells. How this selectivity is achieved remains poorly understood. Here we show that purified N, NSM and SM cell preparations are equally transformable in vitro to lymphoblastoid cells lines (LCLs) that, despite upregulating the activation-induced cytidine deaminase (AID) enzyme necessary for Ig isotype switching and Ig gene hypermutation, still retain the surface Ig phenotype of their parental cells. However, both N- and NSM-derived lines remain inducible to Ig isotype switching by surrogate T cell signals. More importantly, IgH gene analysis of N cell infections revealed two features quite distinct from parallel mitogen-activated cultures. Firstly, following 4 weeks of EBV-driven polyclonal proliferation, individual clonotypes then become increasingly dominant; secondly, in around 35% cases these clonotypes carry Ig gene mutations which both resemble AID products and, when analysed in prospectively-harvested cultures, appear to have arisen by sequence diversification in vitro. Thus EBV infection per se can drive at least some naïve B cells to acquire Ig memory genotypes; furthermore, such cells are often favoured during an LCL's evolution to monoclonality. Extrapolating to viral infections in vivo, these findings could help to explain how EBV-infected cells become restricted to memory B cell subsets and why EBV-driven lymphoproliferative lesions, in primary infection and/or immunocompromised settings, so frequently involve clones with memory genotypes. Epstein-Barr virus (EBV), a growth-transforming virus linked to several B cell lymphomas in man, is usually carried as an asymptomatic latent infection in B lymphocytes. Such virus carriage selectively involves memory, but not naive, B cells. How this selectivity is achieved is poorly understood since we find that naive and memory cell types are equally susceptible to infection and growth transformation to lymphoblastoid cell lines in vitro. Here we ask if EBV-transformation of purified naïve B cells can induce key features of memory cells, namely immunoglobulin (Ig) class switching and Ig gene mutation. We find that EBV does not induce Ig class switching (though the infected cells remain responsive to exogenous switch signals) but can induce Ig gene mutation. Thus, within 4 weeks of infecting naive B cell preparations, one can often detect cells carrying Ig mutations which appear to have arisen by somatic hypermutation in vitro. Furthermore, in many cases such cells become dominant during clonal evolution of the emergent EBV-transformed cell line. Overall these findings suggest a possible explanation as to why EBV is selectively found in memory B cell populations in vivo and why EBV-positive lymphoproliferative lesions/lymphomas so frequently involve clones with mutated Ig genotypes.
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Duarte-Rey C, Bogdanos DP, Leung PS, Anaya JM, Gershwin ME. IgM predominance in autoimmune disease: Genetics and gender. Autoimmun Rev 2012; 11:A404-12. [DOI: 10.1016/j.autrev.2011.12.001] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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