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Klaus T, Hieber C, Bros M, Grabbe S. Integrins in Health and Disease-Suitable Targets for Treatment? Cells 2024; 13:212. [PMID: 38334604 PMCID: PMC10854705 DOI: 10.3390/cells13030212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 01/13/2024] [Accepted: 01/22/2024] [Indexed: 02/10/2024] Open
Abstract
Integrin receptors are heterodimeric surface receptors that play multiple roles regarding cell-cell communication, signaling, and migration. The four members of the β2 integrin subfamily are composed of an alternative α (CD11a-d) subunit, which determines the specific receptor properties, and a constant β (CD18) subunit. This review aims to present insight into the multiple immunological roles of integrin receptors, with a focus on β2 integrins that are specifically expressed by leukocytes. The pathophysiological role of β2 integrins is confirmed by the drastic phenotype of patients suffering from leukocyte adhesion deficiencies, most often resulting in severe recurrent infections and, at the same time, a predisposition for autoimmune diseases. So far, studies on the role of β2 integrins in vivo employed mice with a constitutive knockout of all β2 integrins or either family member, respectively, which complicated the differentiation between the direct and indirect effects of β2 integrin deficiency for distinct cell types. The recent generation and characterization of transgenic mice with a cell-type-specific knockdown of β2 integrins by our group has enabled the dissection of cell-specific roles of β2 integrins. Further, integrin receptors have been recognized as target receptors for the treatment of inflammatory diseases as well as tumor therapy. However, whereas both agonistic and antagonistic agents yielded beneficial effects in animal models, the success of clinical trials was limited in most cases and was associated with unwanted side effects. This unfavorable outcome is most probably related to the systemic effects of the used compounds on all leukocytes, thereby emphasizing the need to develop formulations that target distinct types of leukocytes to modulate β2 integrin activity for therapeutic applications.
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Affiliation(s)
| | | | | | - Stephan Grabbe
- Department of Dermatology, University Medical Center of the Johannes Gutenberg-University Mainz, Langenbeckstraße 1, 55131 Mainz, Germany; (T.K.); (C.H.); (M.B.)
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Klaus T, Wilson A, Fichter M, Bros M, Bopp T, Grabbe S. The Role of LFA-1 for the Differentiation and Function of Regulatory T Cells—Lessons Learned from Different Transgenic Mouse Models. Int J Mol Sci 2023; 24:ijms24076331. [PMID: 37047302 PMCID: PMC10094578 DOI: 10.3390/ijms24076331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 03/22/2023] [Accepted: 03/24/2023] [Indexed: 03/30/2023] Open
Abstract
Regulatory T cells (Treg) are essential for the maintenance of peripheral tolerance. Treg dysfunction results in diverse inflammatory and autoimmune diseases with life-threatening consequences. β2-integrins (CD11a-d/CD18) play important roles in the migration of leukocytes into inflamed tissues and cell signaling. Of all β2-integrins, T cells, including Treg, only express CD11a/CD18, termed lymphocyte function-associated antigen 1 (LFA-1), on their surface. In humans, loss-of-function mutations in the common subunit CD18 result in leukocyte adhesion deficiency type-1 (LAD-1). Clinical symptoms vary depending on the extent of residual β2-integrin function, and patients may experience leukocytosis and recurrent infections. Some patients can develop autoimmune diseases, but the immune processes underlying the paradoxical situation of immune deficiency and autoimmunity have been scarcely investigated. To understand this complex phenotype, different transgenic mouse strains with a constitutive knockout of β2-integrins have been established. However, since a constitutive knockout affects all leukocytes and may limit the validity of studies focusing on their cell type-specific role, we established a Treg-specific CD18-floxed mouse strain. This mini-review aims to delineate the role of LFA-1 for the induction, maintenance, and regulatory function of Treg in vitro and in vivo as deduced from observations using the various β2-integrin-deficient mouse models.
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Of Mycelium and Men: Inherent Human Susceptibility to Fungal Diseases. Pathogens 2023; 12:pathogens12030456. [PMID: 36986378 PMCID: PMC10058615 DOI: 10.3390/pathogens12030456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Revised: 03/09/2023] [Accepted: 03/09/2023] [Indexed: 03/17/2023] Open
Abstract
In medical mycology, the main context of disease is iatrogenic-based disease. However, historically, and occasionally, even today, fungal diseases affect humans with no obvious risk factors, sometimes in a spectacular fashion. The field of “inborn errors of immunity” (IEI) has deduced at least some of these previously enigmatic cases; accordingly, the discovery of single-gene disorders with penetrant clinical effects and their immunologic dissection have provided a framework with which to understand some of the key pathways mediating human susceptibility to mycoses. By extension, they have also enabled the identification of naturally occurring auto-antibodies to cytokines that phenocopy such susceptibility. This review provides a comprehensive update of IEI and autoantibodies that inherently predispose humans to various fungal diseases.
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"Oral Manifestations of Patients with Inherited Defect in Phagocyte Number or Function" a systematic review. Clin Immunol 2021; 229:108796. [PMID: 34271191 DOI: 10.1016/j.clim.2021.108796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 07/10/2021] [Accepted: 07/11/2021] [Indexed: 11/20/2022]
Abstract
INTRODUCTION Inherited phagocyte defects are one of the subgroups of primary immunodeficiency diseases (PIDs) with various clinical manifestations. As oral manifestations are common at the early ages, oral practitioners can have a special role in the early diagnosis. MATERIALS AND METHODS A comprehensive search was conducted in this systematic review study and data of included studies were categorized into four subgroups of phagocyte defects, including congenital neutropenia, defects of motility, defects of respiratory burst, and other non-lymphoid defects. RESULTS Among all phagocyte defects, 12 disorders had reported data for oral manifestations in published articles. A total of 987 cases were included in this study. Periodontitis is one of the most common oral manifestations. CONCLUSION There is a need to organize better collaboration between medical doctors and dentists to diagnose and treat patients with phagocyte defects. Regular dental visits and professional oral health care are recommended from the time of the first primary teeth eruption in newborns.
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Kambli PM, Bargir UA, Yadav RM, Gupta MR, Dalvi AD, Hule G, Kelkar M, Sawant-Desai S, Setia P, Jodhawat N, Nambiar N, Dhawale A, Gaikwad P, Shinde S, Taur P, Gowri V, Pandrowala A, Gupta A, Joshi V, Sharma M, Arora K, Pilania RK, Chaudhary H, Agarwal A, Katiyar S, Bhattad S, Ramprakash S, Cp R, Jayaram A, Gornale V, Raj R, Uppuluri R, Sivasankaran M, Munirathnam D, Lashkari HP, Kalra M, Sachdeva A, Sharma A, Balaji S, Govindraj GM, Karande S, Nanavati R, Manglani M, Subramanyam G, Sampagar A, Ck I, Gutha P, Kanakia S, Mundada SP, Krishna V, Nampoothiri S, Nemani S, Rawat A, Desai M, Madkaikar M. Clinical and Genetic Spectrum of a Large Cohort of Patients With Leukocyte Adhesion Deficiency Type 1 and 3: A Multicentric Study From India. Front Immunol 2020; 11:612703. [PMID: 33391282 PMCID: PMC7772426 DOI: 10.3389/fimmu.2020.612703] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 11/09/2020] [Indexed: 12/11/2022] Open
Abstract
Leukocyte adhesion deficiency (LAD) syndrome is a group of inborn errors of immunity characterized by a defect in the cascade of the activation and adhesion leading to the failure of leukocyte to migrate to the site of tissue injury. Three different types of LAD have been described. The most common subtype is LAD type 1 (LAD1) caused due to defects in the ITGβ2 gene. LAD type 2 (LAD2) is caused by mutations in the SLC35C1 gene leading to a generalized loss of expression of fucosylated glycans on the cell surface and LAD type 3 (LAD3) is caused by mutations in the FERMT3 gene resulting in platelet function defects along with immunodeficiency. There is a paucity of data available from India on LAD syndromes. The present study is a retrospective analysis of patients with LAD collated from 28 different centers across India. For LAD1, the diagnosis was based on clinical features and flow cytometric expression of CD18 on peripheral blood leukocytes and molecular confirmation by Sanger sequencing. For patients with LAD3 diagnosis was largely based on clinical manifestations and identification of the pathogenic mutation in the FERMT3 gene by next-generation Sequencing. Of the total 132 cases diagnosed with LAD, 127 were LAD1 and 5 were LAD3. The majority of our patients (83%) had CD18 expression less than 2% on neutrophils (LAD1°) and presented within the first three months of life with omphalitis, skin and soft tissue infections, delayed umbilical cord detachment, otitis media, and sepsis. The patients with CD18 expression of more than 30% (LAD1+) presented later in life with skin ulcers being the commonest manifestation. Bleeding manifestations were common in patients with LAD3. Persistent neutrophilic leukocytosis was the characteristic finding in all patients. 35 novel mutations were detected in the ITGβ2 gene, and 4 novel mutations were detected in the FERMT3 gene. The study thus presents one of the largest cohorts of patients from India with LAD, focusing on clinical features, immunological characteristics, and molecular spectrum.
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Affiliation(s)
- Priyanka Madhav Kambli
- Center of Excellence for PIDs, Department of Pediatric Immunology and Leukocyte Biology, Indian Council of Medical Research- National Institute of Immunohaematology, Mumbai, India
| | - Umair Ahmed Bargir
- Center of Excellence for PIDs, Department of Pediatric Immunology and Leukocyte Biology, Indian Council of Medical Research- National Institute of Immunohaematology, Mumbai, India
| | - Reetika Malik Yadav
- Center of Excellence for PIDs, Department of Pediatric Immunology and Leukocyte Biology, Indian Council of Medical Research- National Institute of Immunohaematology, Mumbai, India
| | - Maya Ravishankar Gupta
- Center of Excellence for PIDs, Department of Pediatric Immunology and Leukocyte Biology, Indian Council of Medical Research- National Institute of Immunohaematology, Mumbai, India
| | - Aparna Dhondi Dalvi
- Center of Excellence for PIDs, Department of Pediatric Immunology and Leukocyte Biology, Indian Council of Medical Research- National Institute of Immunohaematology, Mumbai, India
| | - Gouri Hule
- Center of Excellence for PIDs, Department of Pediatric Immunology and Leukocyte Biology, Indian Council of Medical Research- National Institute of Immunohaematology, Mumbai, India
| | - Madhura Kelkar
- Center of Excellence for PIDs, Department of Pediatric Immunology and Leukocyte Biology, Indian Council of Medical Research- National Institute of Immunohaematology, Mumbai, India
| | - Sneha Sawant-Desai
- Center of Excellence for PIDs, Department of Pediatric Immunology and Leukocyte Biology, Indian Council of Medical Research- National Institute of Immunohaematology, Mumbai, India
| | - Priyanka Setia
- Center of Excellence for PIDs, Department of Pediatric Immunology and Leukocyte Biology, Indian Council of Medical Research- National Institute of Immunohaematology, Mumbai, India
| | - Neha Jodhawat
- Center of Excellence for PIDs, Department of Pediatric Immunology and Leukocyte Biology, Indian Council of Medical Research- National Institute of Immunohaematology, Mumbai, India
| | - Nayana Nambiar
- Center of Excellence for PIDs, Department of Pediatric Immunology and Leukocyte Biology, Indian Council of Medical Research- National Institute of Immunohaematology, Mumbai, India
| | - Amruta Dhawale
- Center of Excellence for PIDs, Department of Pediatric Immunology and Leukocyte Biology, Indian Council of Medical Research- National Institute of Immunohaematology, Mumbai, India
| | - Pallavi Gaikwad
- Center of Excellence for PIDs, Department of Pediatric Immunology and Leukocyte Biology, Indian Council of Medical Research- National Institute of Immunohaematology, Mumbai, India
| | - Shweta Shinde
- Center of Excellence for PIDs, Department of Pediatric Immunology and Leukocyte Biology, Indian Council of Medical Research- National Institute of Immunohaematology, Mumbai, India
| | - Prasad Taur
- Department of Immunology, Bai Jerbai Wadia Hospital for Children, Mumbai, India
| | - Vijaya Gowri
- Department of Immunology, Bai Jerbai Wadia Hospital for Children, Mumbai, India
| | - Ambreen Pandrowala
- Department of Bone Marrow Transplant, Bai Jerbai Wadia Hospital for Children, Mumbai, India
| | - Anju Gupta
- Allergy Immunology Unit, Department of Pediatrics, Advanced Pediatrics Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Vibhu Joshi
- Allergy Immunology Unit, Department of Pediatrics, Advanced Pediatrics Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Madhubala Sharma
- Allergy Immunology Unit, Department of Pediatrics, Advanced Pediatrics Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Kanika Arora
- Allergy Immunology Unit, Department of Pediatrics, Advanced Pediatrics Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Rakesh Kumar Pilania
- Allergy Immunology Unit, Department of Pediatrics, Advanced Pediatrics Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Himanshi Chaudhary
- Allergy Immunology Unit, Department of Pediatrics, Advanced Pediatrics Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Amita Agarwal
- Department of Clinical Immunology & Rheumatology, Sanjay Gandhi Postgraduate Institute, Lucknow, India
| | - Shobita Katiyar
- Department of Clinical Immunology & Rheumatology, Sanjay Gandhi Postgraduate Institute, Lucknow, India
| | - Sagar Bhattad
- Department of Pediatric Immunology and Rheumatology, Aster CMI Hospital, Bengaluru, India
| | - Stalin Ramprakash
- Pediatric Hemat-Oncology and Bone Marrow Transplant Unit, Aster CMI Hospital, Bengaluru, India
| | - Raghuram Cp
- Pediatric Hemat-Oncology and Bone Marrow Transplant Unit, Aster CMI Hospital, Bengaluru, India
| | - Ananthvikas Jayaram
- Department of Hematology and Pathology, Neuberg Anand Diagnostic and Research Centre, Bangalore, India
| | - Vinod Gornale
- Department of pediatric, Indira Gandhi Institute of Child Health, Bangalore, India
| | - Revathi Raj
- Department of Pediatric Hematology, Oncology, Blood and Marrow Transplantation, Apollo Hospitals, Teynampet, India
| | - Ramya Uppuluri
- Department of Pediatric Hematology, Oncology, Blood and Marrow Transplantation, Apollo Hospitals, Teynampet, India
| | - Meena Sivasankaran
- Department of Pediatric, Hemato-oncology, Kanchi Kamakoti Childs Trust Hospital, Chennai, India
| | | | - Harsha Prasad Lashkari
- Department of Paediatrics, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India
| | - Manas Kalra
- Department of Pediatric Hematology Oncology BMT, Sir Ganga Ram Hospital, New Delhi, India
| | - Anupam Sachdeva
- Department of Pediatric Hematology Oncology BMT, Sir Ganga Ram Hospital, New Delhi, India
| | - Avinash Sharma
- Dr. Rajendra Prasad Government Medical College, Tanda, India
| | - Sarath Balaji
- Department of Paediatrics, Institute of Child Health and Hospital for Children, Chennai, India
| | | | - Sunil Karande
- Department of Pediatrics, King Edward Memorial Hospital, Mumbai, India
| | - Ruchi Nanavati
- Department of Neonatology, King Edward Memorial Hospital, Mumbai, India
| | - Mamta Manglani
- Department of Pediatric, Oncology, Hematology & BMT, Comprehensive Thalassemia Care Center and Bone Marrow, Mumbai, India
| | | | - Abhilasha Sampagar
- Department of Pediatrics, KIES Dr. Prabhakar Kore Hospital & Medical Research, Belgaum, India
| | - Indumathi Ck
- Department of Pediatrics, St. John's Medical College, Bengaluru, India
| | - Parinitha Gutha
- Department of Paediatric Haematology and Oncology, Little Stars Children's Hospital, Hyderabad, India
| | - Swati Kanakia
- Department of Hematology-Oncology, Lilavati Hospital and Research Centre, Mumbai, India
| | | | - Vidya Krishna
- Department of Pediatrics, Sri Ramachandra Medical College, Chennai, India
| | - Sheela Nampoothiri
- Department of Pediatric Genetics, Amrita Institute of Medical Science & Research Center, Cochin, India
| | - Sandeep Nemani
- Nihira Diagnostic Lab, Arihant Galaxy, Ganesh Naga, Sangli, India
| | - Amit Rawat
- Allergy Immunology Unit, Department of Pediatrics, Advanced Pediatrics Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Mukesh Desai
- Department of Immunology, Bai Jerbai Wadia Hospital for Children, Mumbai, India
| | - Manisha Madkaikar
- Center of Excellence for PIDs, Department of Pediatric Immunology and Leukocyte Biology, Indian Council of Medical Research- National Institute of Immunohaematology, Mumbai, India
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Sun B, Chen Q, Dong X, Liu D, Hou J, Wang W, Ying W, Hui X, Zhou Q, Yao H, Sun J, Wang X. Report of a Chinese Cohort with Leukocyte Adhesion Deficiency-I and Four Novel Mutations. J Clin Immunol 2019; 39:309-315. [PMID: 30919141 DOI: 10.1007/s10875-019-00617-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Accepted: 03/18/2019] [Indexed: 12/19/2022]
Abstract
PURPOSE We aimed to report the characteristics of leukocyte adhesion deficiency-I (LAD-I) and four novel mutations in the ITGB2 gene in a Chinese cohort. METHODS Seven patients with LAD-I were reported in our study. Clinical manifestations and immunological phenotypes were reviewed. The expression of CD18 was detected by flow cytometry. Next-generation sequencing (NGS) and Sanger sequencing were performed to identify gene mutations. RESULTS The mean onset age of all the patients was 1.3 months. Recurrent bacterial infections of the skin and lungs were the most common symptoms. Most patients (6/7) had delayed cord separation. The number of white blood cells (WBC) was increased significantly, except that two patients had a mild increase in the number of WBC during infection-free periods. The expression of CD18 was very low in all patients. Homozygous or compound heterozygous mutations in the ITGB2 gene were identified in each patient. Four mutations were novel, including c.1794dupC (p.N599Qfs*93), c.1788C>A (p.C596X), c.841-849del9, and c.741+1delG. Two patients had large deletions of the ITGB2 gene. Five patients were cured by hematopoietic stem cell transplantation (HSCT). CONCLUSIONS This study reported the clinical and molecular characteristics of a Chinese patient cohort. It is helpful in understanding the current status of the disease in China.
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Affiliation(s)
- Bijun Sun
- Department of Clinical Immunology, Children's Hospital of Fudan University, 399 Wanyuan Road, Shanghai, 201102, China
| | - Qiuyu Chen
- Department of Clinical Immunology, Children's Hospital of Fudan University, 399 Wanyuan Road, Shanghai, 201102, China
| | - Xiaolong Dong
- Department of Clinical Immunology, Children's Hospital of Fudan University, 399 Wanyuan Road, Shanghai, 201102, China
| | - Danru Liu
- Department of Clinical Immunology, Children's Hospital of Fudan University, 399 Wanyuan Road, Shanghai, 201102, China
| | - Jia Hou
- Department of Clinical Immunology, Children's Hospital of Fudan University, 399 Wanyuan Road, Shanghai, 201102, China
| | - Wenjie Wang
- Department of Clinical Immunology, Children's Hospital of Fudan University, 399 Wanyuan Road, Shanghai, 201102, China
| | - Wenjing Ying
- Department of Clinical Immunology, Children's Hospital of Fudan University, 399 Wanyuan Road, Shanghai, 201102, China
| | - Xiaoying Hui
- Department of Clinical Immunology, Children's Hospital of Fudan University, 399 Wanyuan Road, Shanghai, 201102, China
| | - Qinhua Zhou
- Department of Clinical Immunology, Children's Hospital of Fudan University, 399 Wanyuan Road, Shanghai, 201102, China
| | - Haili Yao
- Department of Clinical Immunology, Children's Hospital of Fudan University, 399 Wanyuan Road, Shanghai, 201102, China
| | - Jinqiao Sun
- Department of Clinical Immunology, Children's Hospital of Fudan University, 399 Wanyuan Road, Shanghai, 201102, China.
| | - Xiaochuan Wang
- Department of Clinical Immunology, Children's Hospital of Fudan University, 399 Wanyuan Road, Shanghai, 201102, China.
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Fagerholm SC, Guenther C, Llort Asens M, Savinko T, Uotila LM. Beta2-Integrins and Interacting Proteins in Leukocyte Trafficking, Immune Suppression, and Immunodeficiency Disease. Front Immunol 2019; 10:254. [PMID: 30837997 PMCID: PMC6389632 DOI: 10.3389/fimmu.2019.00254] [Citation(s) in RCA: 93] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 01/29/2019] [Indexed: 12/21/2022] Open
Abstract
Beta2-integrins are complex leukocyte-specific adhesion molecules that are essential for leukocyte (e.g., neutrophil, lymphocyte) trafficking, as well as for other immunological processes such as neutrophil phagocytosis and ROS production, and T cell activation. Intriguingly, however, they have also been found to negatively regulate cytokine responses, maturation, and migratory responses in myeloid cells such as macrophages and dendritic cells, revealing new, and unexpected roles of these molecules in immunity. Because of their essential role in leukocyte function, a lack of expression or function of beta2-integrins causes rare immunodeficiency syndromes, Leukocyte adhesion deficiency type I, and type III (LAD-I and LAD-III). LAD-I is caused by reduced or lost expression of beta2-integrins, whilst in LAD-III, beta2-integrins are expressed but dysfunctional because a major integrin cytoplasmic regulator, kindlin-3, is mutated. Interestingly, some LAD-related phenotypes such as periodontitis have recently been shown to be due to an uncontrolled inflammatory response rather than to an uncontrolled infection, as was previously thought. This review will focus on the recent advances concerning the regulation and functions of beta2-integrins in leukocyte trafficking, immune suppression, and immune deficiency disease.
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Affiliation(s)
- Susanna C Fagerholm
- Molecular and Integrative Biosciences Research Program, Faculty of Bio- and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Carla Guenther
- Molecular and Integrative Biosciences Research Program, Faculty of Bio- and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Marc Llort Asens
- Molecular and Integrative Biosciences Research Program, Faculty of Bio- and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | | | - Liisa M Uotila
- Research Services, University of Helsinki, Helsinki, Finland
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Abstract
BACKGROUND AND AIM Leukocyte adhesion deficiency type 1 is a rare, autosomal recessive disorder that results from mutations in the ITGB2 gene. This gene encodes the CD18 subunit of β2 integrin leukocyte adhesion cell molecules. Leukocyte adhesion deficiency type 1 is characterized by recurrent bacterial infections, impaired wound healing, inadequate pus formation, and delayed separation of the umbilical cord. MATERIALS AND METHODS Blood samples were taken from 13 patients after written consent had been obtained. Genomic DNA was extracted, and ITGB2 exons and exon-intron boundaries were amplified by polymerase chain reaction. The products were examined by Sanger sequencing. RESULTS In this study, 8 different previously reported mutations (intron7+1G>A, c.715G>A, c.1777 C>T, c.843del C, c.1768T>C, c.1821C>A, Intron7+1G>A, c.1885G>A) and 2 novel mutations (c.1821C>A; p.Tyr607Ter and c.1822C>T; p.Gln608Ter) were found. CONCLUSIONS c.1821C>A (p.Tyr607Ter) and c.1822C>T (p.Gln608Ter) mutations should be included in the panel of carrier detection and prenatal diagnosis.
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Abu Karaky A, Sawair F, Tamimi Z, Hassona Y. Dental implants in a patient with suspected leucocyte adhesion deficiency. BMJ Case Rep 2017; 2017:bcr-2017-220975. [PMID: 29170171 DOI: 10.1136/bcr-2017-220975] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Aggressive periodontitis and premature tooth loss in leucocyte adhesion deficiency (LAD) have adverse functional and psychological consequences on affected individuals. Dental implant rehabilitation might become necessary to overcome the functional and psychological adverse effects of LAD periodontitis, especially in patients with milder forms who are expected to have a relatively normal life expectancy. Outcome of dental implants in patients with LAD has not been previously reported; we describe the dental rehabilitation of a 24-year-old man with clinical features of LAD using endosseous dental implants.
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Affiliation(s)
- Ashraf Abu Karaky
- Oral and Maxillofacial Surgery, Oral Medicine and Periodontics, School of Dentistry, The University of Jordan, Amman, Jordan
| | - Faleh Sawair
- Oral and Maxillofacial Surgery, Oral Medicine and Periodontics, School of Dentistry, The University of Jordan, Amman, Jordan
| | - Zaid Tamimi
- Oral Surgery and Oral Medicine, Faculty of Dentistry, Jordan University of Science and Technology, Irbid, Jordan
| | - Yazan Hassona
- Oral and Maxillofacial Surgery, Oral Medicine and Periodontics, School of Dentistry, The University of Jordan, Amman, Jordan
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Tewari N, Mathur VP, Yadav VS, Chaudhari P. Leukocyte adhesion defect-I: rare primary immune deficiency. SPECIAL CARE IN DENTISTRY 2017; 37:309-313. [DOI: 10.1111/scd.12249] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Nitesh Tewari
- Pedodontics and Preventive Dentistry, Centre for Dental Education and Research, All India Institute of Medical Sciences; New Delhi India
| | - Vijay Prakash Mathur
- Pedodontics and Preventive Dentistry, Centre for Dental Education and Research, All India Institute of Medical Sciences; New Delhi India
| | - Vikender Singh Yadav
- Periodontics, Centre for Dental Education and Research, All India Institute of Medical Sciences; New Delhi India
| | - Prabhat Chaudhari
- Orthodontics and Dentofacial Deformities, Centre for Dental Education and Research, All India Institute of Medical Sciences; New Delhi India
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Peacock ME, Arce RM, Cutler CW. Periodontal and other oral manifestations of immunodeficiency diseases. Oral Dis 2017; 23:866-888. [PMID: 27630012 PMCID: PMC5352551 DOI: 10.1111/odi.12584] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 08/31/2016] [Accepted: 09/08/2016] [Indexed: 12/14/2022]
Abstract
The list of immunodeficiency diseases grows each year as novel disorders are discovered, classified, and sometimes reclassified due to our ever-increasing knowledge of immune system function. Although the number of patients with secondary immunodeficiencies (SIDs) greatly exceeds those with primary immunodeficiencies (PIDs), the prevalence of both appears to be on the rise probably because of scientific breakthroughs that facilitate earlier and more accurate diagnosis. Primary immunodeficiencies in adults are not as rare as once thought. Globally, the main causes of secondary immunodeficiency are HIV infection and nutritional insufficiencies. Persons with acquired immune disorders such as AIDS caused by the human immunodeficiency virus (HIV) are now living long and fulfilling lives as a result of highly active antiretroviral therapy (HAART). Irrespective of whether the patient's immune-deficient state is a consequence of a genetic defect or is secondary in nature, dental and medical practitioners must be aware of the constant potential for infections and/or expressions of autoimmunity in these individuals. The purpose of this review was to study the most common conditions resulting from primary and secondary immunodeficiency states, how they are classified, and the detrimental manifestations of these disorders on the periodontal and oral tissues.
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Affiliation(s)
- Mark E Peacock
- Associate Professor, Departments of Periodontics, Oral Biology
| | - Roger M. Arce
- Assistant Professor, Departments of Periodontics, Oral Biology
| | - Christopher W Cutler
- Professor, Departments of Periodontics, Oral Biology; Chair, Department of Periodontics, Associate Dean for Research, The Dental College of Georgia at Augusta University
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Invasive Fungal Infection in Primary Immunodeficiencies Other Than Chronic Granulomatous Disease. CURRENT FUNGAL INFECTION REPORTS 2017. [DOI: 10.1007/s12281-017-0273-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Deshpande P, Kathirvel K, Alex AA, Korula A, George B, Shaji RV, Mathews V. Leukocyte Adhesion Deficiency-I: Clinical and Molecular Characterization in an Indian Population. Indian J Pediatr 2016; 83:799-804. [PMID: 26924654 DOI: 10.1007/s12098-016-2051-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 01/27/2016] [Indexed: 10/22/2022]
Abstract
OBJECTIVE To describe clinical and flow cytometric immunophenotyping details of 26 patients of Leukocyte adhesion deficiency-I (LAD-I) along with molecular characterization of 7 patients. METHODS Diagnosis of LAD-I was suspected on the basis of clinical features, white blood cell count and absolute neutrophil counts and flow cytometric assessment of expression of CD18 and CD11(a, b, c) on leukocytes. Mutation analysis was performed using DNA PCR and conformation sensitive gel electrophoresis (CSGE) technique followed by sequencing. RESULTS All the patients were symptomatic by the age of 6 mo, with history of recurrent bacterial infections involving skin, mucosa or umbilical cord (omphalitis) being the most frequent presenting symptoms. White blood cells (WBC) and absolute neutrophil counts (ANC) were markedly elevated, without any specific morphological findings. On flow cytometry, CD11a and CD11c showed moderate correlation with CD18 expression. Mutation analysis was performed in 7 patients and six different mutations (4 missense, 2 nonsense and 1 splice site) were identified, all of which were homozygous in nature. CONCLUSIONS A presentation of repeated bacterial infections during infancy, especially omphalitis, with markedly elevated absolute neutrophil counts should trigger investigations for LAD-I including flow cytometric analysis of CD11/CD18 expression.
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Affiliation(s)
- Prashant Deshpande
- Department of Hematology, Christian Medical College, Vellore, 632004, Tamil Nadu, India
| | - Kotteeswari Kathirvel
- Department of Hematology, Christian Medical College, Vellore, 632004, Tamil Nadu, India
| | - Ansu Abu Alex
- Department of Hematology, Christian Medical College, Vellore, 632004, Tamil Nadu, India
| | - Anu Korula
- Department of Hematology, Christian Medical College, Vellore, 632004, Tamil Nadu, India
| | - Biju George
- Department of Hematology, Christian Medical College, Vellore, 632004, Tamil Nadu, India
| | - R V Shaji
- Department of Hematology, Christian Medical College, Vellore, 632004, Tamil Nadu, India
| | - Vikram Mathews
- Department of Hematology, Christian Medical College, Vellore, 632004, Tamil Nadu, India.
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Mutation spectra of the ITGB2 gene in Iranian families with leukocyte adhesion deficiency type 1. Hum Immunol 2016; 77:191-5. [DOI: 10.1016/j.humimm.2015.11.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2015] [Revised: 11/18/2015] [Accepted: 11/25/2015] [Indexed: 12/23/2022]
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Ganjare A, Bagul N, Kathariya R, Oberoi J. ‘Cell junctions of oral mucosa’- in a nutshell. QSCIENCE CONNECT 2015. [DOI: 10.5339/connect.2015.7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Junctional complexes are specialized contacts between neighboring cells and between cells and the extracellular matrix. They play an important role in embryogenesis, growth and development, as well as being the cause of pathologies. These contacts lead to a number of different interactions that have a profound effect on cellular biology. Cell junctions are best visualized using conventional or freeze-fracture electron microscopy, which reveals the interacting plasma membranes are highly specialized in these regions.
Cell adhesion molecules (CAMs) are proteins responsible for homophillic and heterophillic adhesions. They consist of various groups, including cadherins, selectins and intergrins and they facilitate cell adhesion, cell signaling, and motility. Dysregulation of these molecules can lead to various pathologies, for example mucocutaneous diseases and invasion of cancer. This review focuses on the pathophysiology of cell junctions and related diseases.
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Affiliation(s)
- Anjali Ganjare
- 1Department of Oral Pathology and Microbiology, Dr. D. Y Patil Dental College and Hospital, Dr. D. Y Patil Vidyapeeth, Pune-18, India
| | - Neeta Bagul
- 1Department of Oral Pathology and Microbiology, Dr. D. Y Patil Dental College and Hospital, Dr. D. Y Patil Vidyapeeth, Pune-18, India
| | - Rahul Kathariya
- 2Department of Periodontics and Oral Implantology, Dr. D. Y Patil Dental College and Hospital, Dr. D.Y Patil Vidyapeeth, Pune-18, India
| | - Jyoti Oberoi
- 3Department of Preventive and Pediatric Dentistry, Dr. D. Y Patil School of Dentistry, Nerul, Navi Mumbai- 400706, India
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Strickler A, Gallo S, King A, Rosenzweig SD. Leucocyte adhesion deficiency type 1 with developmental delay secondary to CMV infection and filiation questions. CASE REPORTS 2015; 2015:bcr-2014-208973. [DOI: 10.1136/bcr-2014-208973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Moutsopoulos NM, Chalmers NI, Barb JJ, Abusleme L, Greenwell-Wild T, Dutzan N, Paster BJ, Munson PJ, Fine DH, Uzel G, Holland SM. Subgingival microbial communities in Leukocyte Adhesion Deficiency and their relationship with local immunopathology. PLoS Pathog 2015; 11:e1004698. [PMID: 25741691 PMCID: PMC4351202 DOI: 10.1371/journal.ppat.1004698] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Accepted: 01/22/2015] [Indexed: 11/19/2022] Open
Abstract
Leukocyte Adhesion Deficiency I (LAD-I) is a primary immunodeficiency caused by single gene mutations in the CD18 subunit of β2 integrins which result in defective transmigration of neutrophils into the tissues. Affected patients suffer from recurrent life threatening infections and severe oral disease (periodontitis). Microbial communities in the local environment (subgingival plaque) are thought to be the triggers for inflammatory periodontitis, yet little is known regarding the microbial communities associated with LAD-I periodontitis. Here we present the first comprehensive characterization of the subgingival communities in LAD-I, using a 16S rRNA gene-based microarray, and investigate the relationship of this tooth adherent microbiome to the local immunopathology of periodontitis. We show that the LAD subgingival microbiome is distinct from that of health and Localized Aggressive Periodontitits. Select periodontitis-associated species in the LAD microbiome included Parvimonas micra, Porphyromonas endodontalis, Eubacterium brachy and Treponema species. Pseudomonas aeruginosa, a bacterium not typically found in subgingival plaque is detected in LAD-I. We suggest that microbial products from LAD-associated communities may have a role in stimulating the local inflammatory response. We demonstrate that bacterial LPS translocates into the lesions of LAD-periodontitis potentially triggering immunopathology. We also show in in vitro assays with human macrophages and in vivo in animal models that microbial products from LAD-associated subgingival plaque trigger IL-23-related immune responses, which have been shown to dominate in patient lesions. In conclusion, our current study characterizes the subgingival microbial communities in LAD-periodontitis and supports their role as triggers of disease pathogenesis.
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Affiliation(s)
- Niki M. Moutsopoulos
- Oral Immunity and Inflammation Unit, Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, United States of America
- * E-mail:
| | - Natalia I. Chalmers
- Clinical Research Core, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Jennifer J. Barb
- Center for Information Technology, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Loreto Abusleme
- Oral Immunity and Inflammation Unit, Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Teresa Greenwell-Wild
- Oral Immunity and Inflammation Unit, Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Nicolas Dutzan
- Oral Immunity and Inflammation Unit, Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Bruce J. Paster
- The Forsyth Institute, Cambridge, Massachusetts, United States of America
- Harvard School of Dental Medicine, Boston, Massachusetts, United States of America
| | - Peter J. Munson
- Center for Information Technology, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Daniel H. Fine
- Rutgers School of Dental Medicine, Rutgers University, Newark, New Jersey, United States of America
| | - Gulbu Uzel
- National Institute of Allergy and Infectious Diseases, Laboratory of Clinical Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Steven M. Holland
- National Institute of Allergy and Infectious Diseases, Laboratory of Clinical Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
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Vásquez-De Kartzow R, Jesam C, Nehgme V, Várgas F, Sepúlveda C. Leukocyte adhesion deficiency syndrome: report on the first case in Chile and South America. SAO PAULO MED J 2012; 130:263-6. [PMID: 22965369 PMCID: PMC10619948 DOI: 10.1590/s1516-31802012000400011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2011] [Revised: 01/06/2011] [Accepted: 12/02/2011] [Indexed: 11/22/2022] Open
Abstract
CONTEXT Adhesion molecule deficiency type 1 is a rare disease that should be suspected in any patient whose umbilical cord presents delay in falling off, and who presents recurrent severe infections. Early diagnostic suspicion and early treatment improve the prognosis. CASE REPORT The case of a four-month-old boy with recurrent hospitalizations because of severe bronchopneumonia and several episodes of acute otitis media with non-purulent drainage of mucus and positive bacterial cultures is presented. His medical history included neonatal sepsis and delayed umbilical cord detachment. Laboratory studies showed marked leukocytosis with predominance of neutrophils and decreased CD11b and CD18. These were all compatible with a diagnosis of leukocyte adhesion deficiency type I [LAD type 1].
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Affiliation(s)
- Rodrigo Vásquez-De Kartzow
- Department of Pediatrics, Campus Centro, Facultad de Medicina de la Universidad de Chile, Santiago, Chile.
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Abstract
Neutrophils (also called polymorphonuclear leukocytes) are the most abundant leukocytes whose primary purpose as anti-microbial professional phagocytes is to kill extracellular pathogens. Neutrophils and macrophages are phagocytic cell types that along with other cells effectively link the innate and adaptive arms of the immune response, and help promote inflammatory resolution and tissue healing. Found extensively within the gingival crevice and epithelium, neutrophils are considered the key protective cell type in the periodontal tissues. Histopathology of periodontal lesions indicates that neutrophils form a 'wall' between the junctional epithelium and the pathogen-rich dental plaque which functions as a robust anti-microbial secretory structure and as a unified phagocytic apparatus. However, neutrophil protection is not without cost and is always considered a two-edged sword in that overactivity of neutrophils can cause tissue damage and prolong the extent and severity of inflammatory periodontal diseases. This review will cover the innate and inflammatory functions of neutrophils, and describe the importance and utility of neutrophils to the host response and the integrity of the periodontium in health and disease.
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Affiliation(s)
- David A Scott
- Center for Oral Health and Systemic Disease, University of Louisville, Louisville, KY, USA.
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Nussbaum G, Shapira L. How has neutrophil research improved our understanding of periodontal pathogenesis? J Clin Periodontol 2011; 38 Suppl 11:49-59. [PMID: 21323704 DOI: 10.1111/j.1600-051x.2010.01678.x] [Citation(s) in RCA: 126] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND Neutrophils are the predominant cells responsible for host defence against bacterial infection. Loss of neutrophil defence, due either to deficient number or function, strongly predisposes to bacterial infections such as periodontitis. Yet, the neutrophil oxidative and proteolytic arsenal has also been implicated in perpetrating periodontal tissue damage in periodontitis. AIM In this review, we focus on recent developments that shed light on these two aspects of neutrophil function in periodontitis. METHODS Primary search: using PubMed search for "neutophil", "periodontal", and "periodontitis". Secondary search: using references from the articles found in the first stage. RESULTS Early histological studies showed that infiltrating neutrophils form a wall of cells abutting the junctional epithelium in periodontal inflammatory lesions. The chronic standoff between these neutrophils and the bacterial community suggests that bacterial evasion of neutrophil clearance is a major characteristic of periodontitis. Indeed, not all functional neutrophil deficiencies increase the risk of periodontitis, an observation that points the way towards identification of particular anti-bacterial pathways essential for protection against periodontal pathogens. The net result in the majority of periodontitis patients who exhibit normal neutrophil number and function, is that neutrophils accumulate in the periodontal tissue where they are available to participate in tissue destruction. Diminished neutrophil clearance further contributes to the persistence of activated neutrophils in the periodontal tissue. CONCLUSIONS Data on the role of neutrophils in the pathogenesis of periodontitis are mixed. Neutrophils are a critical arm of the defence against periodontitis, but bacterial evasion of the neutrophil microbicidal machinery coupled with delayed neutrophil apoptosis may transform the neutrophil from defender to perpetrator. At this stage of knowledge, attempts to induce host modulation through neutrophil suppression or activation are premature.
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Affiliation(s)
- Gabriel Nussbaum
- Institute of Dental Sciences, Faculty of Dental Medicine, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
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HAUBEK DORTE. The highly leukotoxic JP2 clone of Aggregatibacter actinomycetemcomitans: evolutionary aspects, epidemiology and etiological role in aggressive periodontitis. APMIS 2010:1-53. [DOI: 10.1111/j.1600-0463.2010.02665.x] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Characterization of 11 new cases of leukocyte adhesion deficiency type 1 with seven novel mutations in the ITGB2 gene. J Clin Immunol 2010; 30:756-60. [PMID: 20549317 DOI: 10.1007/s10875-010-9433-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2010] [Accepted: 05/27/2010] [Indexed: 12/22/2022]
Abstract
BACKGROUND Leukocyte adhesion deficiency type 1 (LAD I) is an autosomal recessive disorder caused by mutations in the ITGB2 gene, encoding the beta2 integrin family. Severe recurrent infections, impaired wound healing, and periodontal diseases are the main features of disease. METHODS In order to investigate clinical and molecular manifestations of new LAD I cases, 11 patients diagnosed in one center during 7 years were studied. Patients were screened for the ITGB2 gene mutations, using polymerase chain reaction, followed by single-strand conformation polymorphism and sequencing. RESULTS The most common first presenting feature of the patients was omphalitis. The mean age of cord separation was 19.9 +/- 1 days. The most common clinical manifestations of the patients during the follow-up period included omphalitis, skin ulcers with poor healing, sepsis, and otitis media. During the follow-up, eight patients died. Eight homozygous changes, including seven novel mutations, were detected: two splicing (IVS4-6C>A, IVS7+1G>A), three missense (Asp128Tyr, Ala239Thr, and Gly716Ala), and three frameshift deletions (Asn282fsX41, Tyr382fsX9, and Lys636fsX22). CONCLUSION Our results indicate that different mutations underlie the development of LAD I. Definitive molecular diagnosis is valuable for genetic counseling and prenatal diagnosis. Regarding clinical presentations, it seems that omphalitis is the most consistent finding seen in LAD I infants.
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Harp JR, Onami TM. Naïve T cells re-distribute to the lungs of selectin ligand deficient mice. PLoS One 2010; 5:e10973. [PMID: 20532047 PMCID: PMC2881108 DOI: 10.1371/journal.pone.0010973] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2010] [Accepted: 05/07/2010] [Indexed: 11/18/2022] Open
Abstract
Background Selectin mediated tethering represents one of the earliest steps in T cell extravasation into lymph nodes via high endothelial venules and is dependent on the biosynthesis of sialyl Lewis X (sLex) ligands by several glycosyltransferases, including two fucosyltransferases, fucosyltransferase-IV and –VII. Selectin mediated binding also plays a key role in T cell entry to inflamed organs. Methodology/Principal Findings To understand how loss of selectin ligands (sLex) influences T cell migration to the lung, we examined fucosyltransferase-IV and –VII double knockout (FtDKO) mice. We discovered that FtDKO mice showed significant increases (∼5-fold) in numbers of naïve T cells in non-inflamed lung parenchyma with no evidence of induced bronchus-associated lymphoid tissue. In contrast, activated T cells were reduced in inflamed lungs of FtDKO mice following viral infection, consistent with the established role of selectin mediated T cell extravasation into inflamed lung. Adoptive transfer of T cells into FtDKO mice revealed impaired T cell entry to lymph nodes, but selective accumulation in non-lymphoid organs. Moreover, inhibition of T cell entry to the lymph nodes by blockade of L-selectin, or treatment of T cells with pertussis toxin to inhibit chemokine dependent G-coupled receptor signaling, also resulted in increased T cells in non-lymphoid organs. Conversely, inhibition of T cell egress from lymph nodes using FTY720 agonism of S1P1 impaired T cell migration into non-lymphoid organs. Conclusions/Significance Taken together, our results suggest that impaired T cell entry into lymph nodes via high endothelial venules due to genetic deficiency of selectin ligands results in the selective re-distribution and accumulation of T cells in non-lymphoid organs, and correlates with their increased frequency in the blood. Re-distribution of T cells into organs could potentially play a role in the initiation of T cell mediated organ diseases.
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Affiliation(s)
- John R. Harp
- Department of Microbiology, University of Tennessee, Knoxville, Tennessee, United States of America
| | - Thandi M. Onami
- Department of Microbiology, University of Tennessee, Knoxville, Tennessee, United States of America
- * E-mail:
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Abstract
The complement system is composed of more than 30 serum and membrane-bound proteins, all of which are needed for normal function of complement in innate and adaptive immunity. Historically, deficiencies within the complement system have been suspected when young children have had recurrent and difficult-to-control infections. As our understanding of the complement system has increased, many other diseases have been attributed to deficiencies within the complement system. Generally, complement deficiencies within the classical pathway lead to increased susceptibility to encapsulated bacterial infections as well as a syndrome resembling systemic lupus erythematosus. Complement deficiencies within the mannose-binding lectin pathway generally lead to increased bacterial infections, and deficiencies within the alternative pathway usually lead to an increased frequency of Neisseria infections. However, factor H deficiency can lead to membranoproliferative glomerulonephritis and hemolytic uremic syndrome. Finally, deficiencies within the terminal complement pathway lead to an increased incidence of Neisseria infections. Two other notable complement-associated deficiencies are complement receptor 3 and 4 deficiency, which result from a deficiency of CD18, a disease known as leukocyte adhesion deficiency type 1, and CD59 deficiency, which causes paroxysmal nocturnal hemoglobinuria. Most inherited deficiencies of the complement system are autosomal recessive, but properidin deficiency is X-linked recessive, deficiency of C1 inhibitor is autosomal dominant, and mannose-binding lectin and factor I deficiencies are autosomal co-dominant. The diversity of clinical manifestations of complement deficiencies reflects the complexity of the complement system.
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Affiliation(s)
- H David Pettigrew
- Division of Rheumatology, Allergy and Clinical Immunology, University of California at Davis School of Medicine, Davis, California 95616, USA
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Etzioni A. Genetic etiologies of leukocyte adhesion defects. Curr Opin Immunol 2009; 21:481-6. [PMID: 19647987 DOI: 10.1016/j.coi.2009.07.005] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2009] [Revised: 07/06/2009] [Accepted: 07/06/2009] [Indexed: 12/29/2022]
Abstract
Up to now three distinct syndromes affecting several steps in the leukocyte adhesion cascade have been described. In LAD I the firm adhesion of leukocyte to the endothelium is defective, because of mutations in the gene encoding the beta(2)-integrin. Recent works both in human and animal models shed light on various mutations and their physiological importance. Furthermore, the beneficial effect of gene therapy is also becoming clear. LAD II which involved the first phase of the cascade, the rolling phase, is caused by mutations in the specific fucose transporter to the Golgi apparatus. Gene targeted mice were able to demonstrate indeed the role of this transporter in the adhesion process and long-term follow-up of patients showed that while in childhood immunodeficiency is the prominent feature, later on in life the metabolic consequences govern the clinical pictures. LAD III is the last syndrome to be described and a primary activation defect in all three beta-integrins 1, 2, and 3 is detected. Just recently mutations in Kindlin 3, a newly recognized component, which binds the cytoplasmic tail of integrin, and is important in integrin activation, the second phase of the adhesion cascade, were found.
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Affiliation(s)
- Amos Etzioni
- Meyer's Children Hospital, Rappaport Faculty of Medicine, Technion, Haifa, Israel.
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Current world literature. Curr Opin Pediatr 2009; 21:272-80. [PMID: 19307901 DOI: 10.1097/mop.0b013e32832ad5c0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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