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Hemanth V, Kindo AJ, Rengasamy M, Sankarasubramaian A, Adhikrishnan S. Analysis of Mannose-Binding Lectin Protein Levels and their MIC Profile in Patients with Dermatophytosis. Indian Dermatol Online J 2022; 14:94-96. [PMID: 36776178 PMCID: PMC9910524 DOI: 10.4103/idoj.idoj_725_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 02/17/2022] [Accepted: 02/18/2022] [Indexed: 12/30/2022] Open
Affiliation(s)
- Veena Hemanth
- Department of Microbiology, Sri Ramachandra Medical College and Research Institute, Chennai, Tamil Nadu, India
| | - Anupma J. Kindo
- Department of Microbiology, Sri Ramachandra Medical College and Research Institute, Chennai, Tamil Nadu, India,Address for correspondence: Dr. Anupma J. Kindo, Department of Microbiology, Sri Ramachandra Medical College and Research, Institute, Chennai, Tamil Nadu, India. E-mail:
| | - Madhu Rengasamy
- Department of Dermatology, Madras Medical College, Chennai, Tamil Nadu, India
| | - Anandan Sankarasubramaian
- Department of Dermatology, Sri Ramachandra Medical College and Research Institute, Chennai, Tamil Nadu, India
| | - S Adhikrishnan
- Department of Dermatology, Sri Ramachandra Medical College and Research Institute, Chennai, Tamil Nadu, India
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2
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Zeng J, Wang D, Luo J, Li L, Lin L, Li J, Zheng W, Zuo D, Yang B. Mannan-binding lectin exacerbates the severity of psoriasis by promoting plasmacytoid dendritic cell differentiation via the signal transducer and activator of transcription 3-interferon regulatory factor 8 axis. J Dermatol 2022; 49:496-507. [PMID: 35347767 DOI: 10.1111/1346-8138.16323] [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: 10/29/2021] [Revised: 12/29/2021] [Accepted: 01/09/2022] [Indexed: 11/26/2022]
Abstract
Psoriasis is a chronic inflammatory skin disease mediated by host immune responses. Plasmacytoid dendritic cells (pDC) and interferon (IFN)-α secreted by pDC are involved in the initiation of psoriasis. Mannan-binding lectin (MBL), a vital component of the complement pathway, plays a critical role in innate immune defense and the inflammatory response. Our previous study found that MBL could exacerbate skin inflammation in psoriatic mice, but the effect of MBL on pDC remains unstudied. Herein, we revealed that the circulating level of MBL was elevated in patients with psoriasis compared with the healthy controls. Moreover, the MBL level was positively correlated with disease severity, relative inflammatory cytokine levels, and peripheral blood (PB) pDC frequency in psoriasis. An in vitro study determined that the MBL protein could promote the differentiation of human pDC and upregulate the production of relative inflammatory cytokines and chemokines. Additionally, MBL-deficient (MBL-/- ) mice exhibited decreased accumulation of pDC in lymph nodes, spleens, and skin lesions with reduced secretion of pDC-related cytokines compared with wild-type (WT) mice in the preliminary stage of psoriasis induced by imiquimod. Notably, the differentiation of pDC from bone marrow (BM) cells derived from MBL-/- mice was weakened compared with that from WT mice upon Fms-like tyrosine kinase 3 ligand (Flt3L) incubation. Mechanistic research indicated that the signal transducer and activator of transcription 3 (STAT3)-interferon regulatory factor 8 (IRF8) axis was responsible for MBL-modulated pDC differentiation. In summary, these results suggest that MBL exacerbates the severity of psoriasis by enhancing pDC differentiation and pDC-related cytokine secretion via the STAT3-IRF8 axis, thus providing a new target for psoriasis treatment.
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Affiliation(s)
- Jiaqi Zeng
- Department of Dermatology, Dermatology Hospital, Southern Medical University, Guangzhou, China
| | - Di Wang
- Department of Dermatology, Dermatology Hospital, Southern Medical University, Guangzhou, China
| | - Jialiang Luo
- Department of Medical Laboratory, School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China.,Guangdong Province Key Laboratory of Proteomics, Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Lei Li
- Department of Medical Laboratory, School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China.,Guangdong Province Key Laboratory of Proteomics, Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Luyang Lin
- Guangdong Province Key Laboratory of Proteomics, Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China.,Guangzhou Institute of Dermatology, Guangzhou, China
| | - Jingyi Li
- Department of Dermatology, Dermatology Hospital, Southern Medical University, Guangzhou, China
| | - Wen Zheng
- Department of Dermatology, Dermatology Hospital, Southern Medical University, Guangzhou, China
| | - Daming Zuo
- Department of Medical Laboratory, School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China.,Microbiome Medicine Center, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Bin Yang
- Department of Dermatology, Dermatology Hospital, Southern Medical University, Guangzhou, China
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3
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Wang T, Li K, Xiao S, Xia Y. A Plausible Role for Collectins in Skin Immune Homeostasis. Front Immunol 2021; 12:594858. [PMID: 33790889 PMCID: PMC8006919 DOI: 10.3389/fimmu.2021.594858] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 02/25/2021] [Indexed: 12/13/2022] Open
Abstract
The skin is a complex organ that faces the external environment and participates in the innate immune system. Skin immune homeostasis is necessary to defend against external microorganisms and to recover from stress to the skin. This homeostasis depends on interactions among a variety of cells, cytokines, and the complement system. Collectins belong to the lectin pathway of the complement system, and have various roles in innate immune responses. Mannose-binding lectin (MBL), collectin kidney 1, and liver (CL-K1, CL-L1) activate the lectin pathway, while all have multiple functions, including recognition of pathogens, opsonization of phagocytosis, and modulation of cytokine-mediated inflammatory responses. Certain collectins are localized in the skin, and their expressions change during skin diseases. In this review, we summarize important advances in our understanding of how MBL, surfactant proteins A and D, CL-L1, and CL-K1 function in skin immune homeostasis. Based on the potential roles of collectins in skin diseases, we suggest therapeutic strategies for skin diseases through the targeting of collectins and relevant regulators.
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Affiliation(s)
- Tian Wang
- Department of Dermatology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Ke Li
- Core Research Laboratory, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Shengxiang Xiao
- Department of Dermatology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Yumin Xia
- Department of Dermatology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
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4
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Bhargava S, Becker N, Kroumpouzos G. Atypical Clinical Presentation of Hidradenitis Suppurativa in a Patient with Severe Mannose-Binding Lectin Deficiency. Case Rep Dermatol 2020; 12:83-91. [PMID: 32508615 PMCID: PMC7250386 DOI: 10.1159/000507539] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Accepted: 03/26/2020] [Indexed: 12/18/2022] Open
Abstract
Mannose-binding lectin (MBL) deficiency is associated with recurrent infections, autoimmune and inflammatory skin disease, and vascular complications. MBL deficiency is not a recognized comorbidity in hidradenitis suppurativa (HS); the latter is associated with the group of autoinflammatory disorders. A 32-year-old woman presented with a history of recurrent painful, deep-seated abscesses and pustular lesions since the age of 13 years. Lesions were noted predominantly in HS distribution, i.e., submammary, inguinal, and perianal areas were affected. However, unusual locations (jawlines, neck) were also affected. The patient fulfilled the clinical criteria for HS but the presentation was atypical because lesions were noted in unusual locations, most lesions were in Hurley stage 1 (sparsity of sinus tracts and scarring), and most cultures from abscesses and pustular lesions were negative. The excruciating pain caused by constantly developing abscesses had a profound impact on the patient's quality of life. Laboratory workup showed an exceptionally low serum MBL level. Treatment was challenging with only a temporary, mild response to oral antibiotic therapy and no response to immunosuppressive and hormonal therapies. This atypical HS presentation may reflect an enhancement of proinflammatory mechanisms. Health care providers should be aware of this clinicopathologic presentation so that the establishment of HS diagnosis is not delayed and the patient receives appropriate counseling.
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Affiliation(s)
- Shashank Bhargava
- Department of Dermatology, R.D. Gardi Medical College, Ujjain, India
| | | | - George Kroumpouzos
- Department of Dermatology, Alpert Medical School, Brown University, Providence, Rhode Island, USA
- GK Dermatology, PC, South Weymouth, Massachusetts, USA
- Department of Dermatology, Medical School of Jundiaí, São Paulo, Brazil
- *George Kroumpouzos, MD, PhD, FAAD, Department of Dermatology, Alpert Medical School, Brown University, Rhode Island Hospital, APC 10, 593 Eddy Street, Providence, RI 02903 (USA),
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5
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Jürgensen HJ, Nørregaard KS, Sibree MM, Santoni-Rugiu E, Madsen DH, Wassilew K, Krustrup D, Garred P, Bugge TH, Engelholm LH, Behrendt N. Immune regulation by fibroblasts in tissue injury depends on uPARAP-mediated uptake of collectins. J Cell Biol 2018; 218:333-349. [PMID: 30366943 PMCID: PMC6314555 DOI: 10.1083/jcb.201802148] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 09/14/2018] [Accepted: 10/17/2018] [Indexed: 11/22/2022] Open
Abstract
Collectins such as mannose-binding lectin (MBL) and surfactant protein D (SP-D) become temporarily deposited in extravascular compartments after tissue injury and perform immune-stimulatory or inflammation-limiting functions. However, their turnover mechanisms, necessary to prevent excessive tissue damage, are virtually unknown. In this study, we show that fibroblasts in injured tissues undertake the clearance of collectins by using the endocytic collagen receptor uPARAP. In cellular assays, several types of collectins were endocytosed in a highly specific uPARAP-dependent process, not shared by the closely related receptor MR/CD206. When introduced into dermis or bleomycin-injured lungs of mice, collectins MBL and SP-D were endocytosed and routed for lysosomal degradation by uPARAP-positive fibroblasts. Fibroblast-specific expression of uPARAP governed endogenous SP-D levels and overall survival after lung injury. In lung tissue from idiopathic pulmonary fibrosis patients, a strong up-regulation of uPARAP was observed in fibroblasts adjacent to regions with SP-D secretion. This study demonstrates a novel immune-regulatory function of fibroblasts and identifies uPARAP as an endocytic receptor in immunity.
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Affiliation(s)
- Henrik J Jürgensen
- Finsen Laboratory, Rigshospitalet/Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark.,Proteases and Tissue Remodeling Section, Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD
| | - Kirstine S Nørregaard
- Finsen Laboratory, Rigshospitalet/Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
| | - Megan M Sibree
- Proteases and Tissue Remodeling Section, Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD
| | - Eric Santoni-Rugiu
- Department of Pathology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Daniel H Madsen
- Finsen Laboratory, Rigshospitalet/Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark.,Center for Cancer Immune Therapy, Department of Haematology, Copenhagen University Hospital, Herlev, Denmark.,Proteases and Tissue Remodeling Section, Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD
| | - Katharina Wassilew
- Department of Pathology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Dorrit Krustrup
- Department of Pathology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Peter Garred
- Laboratory of Molecular Medicine, Department of Clinical Immunology Section 7631, Rigshospitalet, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Thomas H Bugge
- Proteases and Tissue Remodeling Section, Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD
| | - Lars H Engelholm
- Finsen Laboratory, Rigshospitalet/Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
| | - Niels Behrendt
- Finsen Laboratory, Rigshospitalet/Biotech Research and Innovation Centre, University of Copenhagen, Copenhagen, Denmark
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6
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A Two-Step Feature Selection Method to Predict Cancerlectins by Multiview Features and Synthetic Minority Oversampling Technique. BIOMED RESEARCH INTERNATIONAL 2018; 2018:9364182. [PMID: 29568772 PMCID: PMC5820548 DOI: 10.1155/2018/9364182] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 12/25/2017] [Accepted: 12/26/2017] [Indexed: 11/18/2022]
Abstract
Cancerlectins have an inhibitory effect on the growth of cancer cells and are currently being employed as therapeutic agents. The accurate identification of the cancerlectins should provide insight into the molecular mechanisms of cancers. In this study, a new computational method based on the RF (Random Forest) algorithm is proposed for further improving the performance of identifying cancerlectins. Hybrid feature space before feature selection is developed by combining different individual feature spaces, CTD (Composition, Transition, and Distribution), PseAAC (Pseudo Amino Acid Composition), PSSM (Position-Specific Scoring Matrix), and disorder. The SMOTE (Synthetic Minority Oversampling Technique) is applied to solve the imbalanced data problem. To reduce feature redundancy and computation complexity, we propose a two-step feature selection process to select informative features. A 5-fold cross-validation technique is used for the evaluation of various prediction strategies. The proposed method achieves a sensitivity of 0.779, a specificity of 0.717, an accuracy of 0.748, and an MCC (Matthew's Correlation Coefficient) of 0.497. The prediction results are also compared with other existing methods on the same dataset using 5-fold cross-validation. The comparison results demonstrate the high effectiveness of our method for predicting cancerlectins.
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7
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Beltrame MH, Boldt ABW, Catarino SJ, Mendes HC, Boschmann SE, Goeldner I, Messias-Reason I. MBL-associated serine proteases (MASPs) and infectious diseases. Mol Immunol 2015; 67:85-100. [PMID: 25862418 PMCID: PMC7112674 DOI: 10.1016/j.molimm.2015.03.245] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 03/11/2015] [Accepted: 03/12/2015] [Indexed: 12/16/2022]
Abstract
MASP-1 and MASP-2 are central players of the lectin pathway of complement. MASP1 and MASP2 gene polymorphisms regulate protein serum levels and activity. MASP deficiencies are associated with increased infection susceptibility. MASP polymorphisms and serum levels are associated with disease progression.
The lectin pathway of the complement system has a pivotal role in the defense against infectious organisms. After binding of mannan-binding lectin (MBL), ficolins or collectin 11 to carbohydrates or acetylated residues on pathogen surfaces, dimers of MBL-associated serine proteases 1 and 2 (MASP-1 and MASP-2) activate a proteolytic cascade, which culminates in the formation of the membrane attack complex and pathogen lysis. Alternative splicing of the pre-mRNA encoding MASP-1 results in two other products, MASP-3 and MAp44, which regulate activation of the cascade. A similar mechanism allows the gene encoding MASP-2 to produce the truncated MAp19 protein. Polymorphisms in MASP1 and MASP2 genes are associated with protein serum levels and functional activity. Since the first report of a MASP deficiency in 2003, deficiencies in lectin pathway proteins have been associated with recurrent infections and several polymorphisms were associated with the susceptibility or protection to infectious diseases. In this review, we summarize the findings on the role of MASP polymorphisms and serum levels in bacterial, viral and protozoan infectious diseases.
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Affiliation(s)
- Marcia H Beltrame
- Department of Clinical Pathology, Hospital de Clínicas, Universidade Federal do Paraná (UFPR), Curitiba, PR, Brazil
| | - Angelica B W Boldt
- Department of Genetics, Universidade Federal do Paraná, Curitiba, PR, Brazil
| | - Sandra J Catarino
- Department of Clinical Pathology, Hospital de Clínicas, Universidade Federal do Paraná (UFPR), Curitiba, PR, Brazil
| | - Hellen C Mendes
- Department of Clinical Pathology, Hospital de Clínicas, Universidade Federal do Paraná (UFPR), Curitiba, PR, Brazil
| | - Stefanie E Boschmann
- Department of Clinical Pathology, Hospital de Clínicas, Universidade Federal do Paraná (UFPR), Curitiba, PR, Brazil
| | - Isabela Goeldner
- Department of Clinical Pathology, Hospital de Clínicas, Universidade Federal do Paraná (UFPR), Curitiba, PR, Brazil
| | - Iara Messias-Reason
- Department of Clinical Pathology, Hospital de Clínicas, Universidade Federal do Paraná (UFPR), Curitiba, PR, Brazil.
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8
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Beltrame MH, Catarino SJ, Goeldner I, Boldt ABW, de Messias-Reason IJ. The lectin pathway of complement and rheumatic heart disease. Front Pediatr 2014; 2:148. [PMID: 25654073 PMCID: PMC4300866 DOI: 10.3389/fped.2014.00148] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Accepted: 12/29/2014] [Indexed: 12/19/2022] Open
Abstract
The innate immune system is the first line of host defense against infection and is comprised of humoral and cellular mechanisms that recognize potential pathogens within minutes or hours of entry. The effector components of innate immunity include epithelial barriers, phagocytes, and natural killer cells, as well as cytokines and the complement system. Complement plays an important role in the immediate response against microorganisms, including Streptococcus sp. The lectin pathway is one of three pathways by which the complement system can be activated. This pathway is initiated by the binding of mannose-binding lectin (MBL), collectin 11 (CL-K1), and ficolins (Ficolin-1, Ficolin-2, and Ficolin-3) to microbial surface oligosaccharides and acetylated residues, respectively. Upon binding to target molecules, MBL, CL-K1, and ficolins form complexes with MBL-associated serine proteases 1 and 2 (MASP-1 and MASP-2), which cleave C4 and C2 forming the C3 convertase (C4b2a). Subsequent activation of complement cascade leads to opsonization, phagocytosis, and lysis of target microorganisms through the formation of the membrane-attack complex. In addition, activation of complement may induce several inflammatory effects, such as expression of adhesion molecules, chemotaxis and activation of leukocytes, release of reactive oxygen species, and secretion of cytokines and chemokines. In this chapter, we review the general aspects of the structure, function, and genetic polymorphism of lectin-pathway components and discuss most recent understanding on the role of the lectin pathway in the predisposition and clinical progression of Rheumatic Fever.
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Affiliation(s)
- Marcia Holsbach Beltrame
- Department of Clinical Pathology, Hospital de Clínicas, Universidade Federal do Paraná , Curitiba , Brazil
| | - Sandra Jeremias Catarino
- Department of Clinical Pathology, Hospital de Clínicas, Universidade Federal do Paraná , Curitiba , Brazil
| | - Isabela Goeldner
- Department of Clinical Pathology, Hospital de Clínicas, Universidade Federal do Paraná , Curitiba , Brazil
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9
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Lee HJ, Jung KE, Kim HS, Lee JY, Kim HO, Park YM. Zosteriform transient acantholytic dermatosis. J Dermatol 2013; 41:104-5. [PMID: 24354617 DOI: 10.1111/1346-8138.12320] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Hyun Jong Lee
- Department of Dermatology, Seoul St Mary's Hospital, College of Medicine, Catholic University of Korea, Seoul, Korea
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10
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Investigation of Mannose–Binding Lectin Level and Deficiency in Patients with Dermatophytosis. Jundishapur J Microbiol 2013. [DOI: 10.5812/jjm.8255] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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11
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Boldt ABW, Goeldner I, Stahlke ERS, Thiel S, Jensenius JC, de Messias-Reason IJT. Leprosy association with low MASP-2 levels generated by MASP2 haplotypes and polymorphisms flanking MAp19 exon 5. PLoS One 2013; 8:e69054. [PMID: 23935922 PMCID: PMC3728295 DOI: 10.1371/journal.pone.0069054] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Accepted: 06/04/2013] [Indexed: 01/31/2023] Open
Abstract
Background The gene MASP2 (mannan-binding lectin (MBL)-associated serine protease 2) encodes two proteins, MASP-2 and MAp19 (MBL-associated protein of 19 kDa), bound in plasma to MBL and ficolins. The binding of MBL/MASP-2 and ficolin/MASP-2 complexes to microorganisms activates the lectin pathway of complement and may increase the ingestion of intracellular pathogens such as Mycobacterium leprae. Methods We haplotyped 11 MASP2 polymorphisms with multiplex sequence-specific PCR in 219 Brazilian leprosy patients (131 lepromatous, 29 borderline, 21 tuberculoid, 14 undetermined, 24 unspecified), 405 healthy Brazilians and 291 Danish blood donors with previously determined MASP-2 and MAp19 levels. We also evaluated MASP-2 levels in further 46 leprosy patients and 69 Brazilian controls. Results Two polymorphisms flanking exon 5 of MASP2 were associated with a dominant effect on high MASP-2 levels and an additive effect on low MAp19 levels. Patients presented lower MASP-2 levels (P = 0.0012) than controls. The frequency of the p.126L variant, associated with low MASP-2 levels (below 200 ng/mL), was higher in the patients (P = 0.0002, OR = 4.92), as was the frequency of genotypes with p.126L (P = 0.00006, OR = 5.96). The *1C2-l [AG] haplotype, which harbors p.126L and the deficiency-causing p.439H variant, has a dominant effect on the susceptibility to the disease (P = 0.007, OR = 4.15). Genotypes composed of the *2B1-i and/or *2B2A-i haplotypes, both associated with intermediate MASP-2 levels (200–600 ng/mL), were found to be protective against the disease (P = 0.0014, OR = 0.6). Low MASP-2 levels (P = 0.022), as well as corresponding genotypes with *1C2-l and/or *2A2-l but without *1B1-h or *1B2-h, were more frequent in the lepromatous than in other patients (P = 0.008, OR = 8.8). Conclusions In contrast with MBL, low MASP-2 levels increase the susceptibility to leprosy in general and to lepromatous leprosy in particular. MASP2 genotypes and MASP-2 levels might thus be of prognostic value for leprosy progression.
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Affiliation(s)
- Angelica Beate Winter Boldt
- Laboratório de Imunopatologia Molecular - Hospital de Clínicas, Universidade Federal do Paraná, Curitiba, BR.
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12
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The lectin pathway and its implications in coagulation, infections and auto-immunity. Curr Opin Organ Transplant 2013; 16:21-7. [PMID: 21150610 DOI: 10.1097/mot.0b013e32834253df] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
PURPOSE OF REVIEW To give a comprehensive overview of the recently published studies on the role of the lectin pathway in coagulation, infections and auto-immunity. RECENT FINDINGS We present the status quo picture of the lectin pathway, including the newly discovered member, MAp44 (a.k.a. MAP-1), which may act as a specific regulator of activation. On the functional side the focus is on the important discoveries of the connections between the coagulation system and mannose-binding lectin-associated serine proteases, newly discovered associations between the lectin pathway and infectious diseases, especially among neonates, the recent findings of the involvement of mannan-binding lectin and ficolins in auto-immune disorders, and novel therapeutic avenues. The involvement of the lectin pathway in ischemia-reperfusion injuries and transplantations is discussed elsewhere in this issue. SUMMARY The emerging picture of the lectin pathway is that it may play a role in the case of concomitant impairments of cellular and adaptive immunity, as seen in the case of premature infants, neonates, neutropenic cancer patients and the like. Considering the near-exponential increase in interest for the lectin pathway and its intricacies in recent years, the future of the field seems promising.
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13
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Boldt ABW, Goeldner I, de Messias-Reason IJT. Relevance of the lectin pathway of complement in rheumatic diseases. Adv Clin Chem 2012; 56:105-53. [PMID: 22397030 DOI: 10.1016/b978-0-12-394317-0.00012-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Due to its importance both in the clearance of pathogens that contribute as rheumatic etiological agents and in the disposal of apoptotic bodies and potential autoimmune initiators, deficiencies of the components of the lectin pathway of complement have been found to increase susceptibility and modulate the severity of most rheumatic disorders. This chapter introduces the general aspects of the structure, function, and genetics of lectin pathway components and summarizes current knowledge of the field regarding rheumatic diseases predisposition and modulation.
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Affiliation(s)
- Angelica B W Boldt
- Molecular Immunopathology Laboratory, Department of Medical Pathology, Federal University of Paraná, Curitiba, Brazil
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14
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Watkins CE, Litchfield J, Song E, Jaishankar GB, Misra N, Holla N, Duffourc M, Krishnaswamy G. Chronic granulomatous disease, the McLeod phenotype and the contiguous gene deletion syndrome-a review. Clin Mol Allergy 2011; 9:13. [PMID: 22111908 PMCID: PMC3267648 DOI: 10.1186/1476-7961-9-13] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2011] [Accepted: 11/23/2011] [Indexed: 11/29/2022] Open
Abstract
Chronic Granulomatous Disease (CGD), a disorder of the NADPH oxidase system, results in phagocyte functional defects and subsequent infections with bacterial and fungal pathogens (such as Aspergillus species and Candida albicans). Deletions and missense, frameshift, or nonsense mutations in the gp91phox gene (also termed CYBB), located in the Xp21.1 region of the X chromosome, are associated with the most common form of CGD. When larger X-chromosomal deletions occur, including the XK gene deletion, a so-called "Contiguous Gene Deletion Syndrome" may result. The contiguous gene deletion syndrome is known to associate the Kell phenotype/McLeod syndrome with diseases such as X-linked chronic granulomatous disease, Duchenne muscular dystrophy, and X-linked retinitis pigmentosa. These patients are often complicated and management requires special attention to the various facets of the syndrome.
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Affiliation(s)
- Casey E Watkins
- Division of Allergy, Asthma and Clinical Immunology, Department of Medicine, Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee, USA.
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15
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Multiplex sequence-specific polymerase chain reaction reveals new MASP2 haplotypes associated with MASP-2 and MAp19 serum levels. Hum Immunol 2011; 72:753-60. [PMID: 21683108 DOI: 10.1016/j.humimm.2011.05.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2011] [Revised: 04/23/2011] [Accepted: 05/13/2011] [Indexed: 11/21/2022]
Abstract
Deficiency of mannan-binding lectin-associated serine protease 2 (MASP-2) has been associated with infections, whereas high levels appear to increase the risk of inflammatory disorders. Nevertheless, MASP2 haplotypes have been poorly investigated. To overcome haplotyping cost and time consumption, we developed multiplex polymerase chain reactions with sequence-specific primers (PCR-SSP) for 8 single nucleotide polymorphisms (SNPs), reducing the number of necessary reactions from 18 to 7. SNPs were distributed from the promoter to the last exon, and a single PCR-SSP was used for p.D120G. We evaluated the phylogenetic relationships and global distribution of 10 identified haplotypes in 338 Danish individuals with known MASP-2 and MAp19 levels and 309 South Brazilians. Four haplotypes were associated with reduced MASP-2 levels in plasma (lower than 200 ng/mL). Simultaneous association with the highest MASP-2 (over 600 ng/mL) and lowest MAp19 levels (lower than 200 ng/mL) was demonstrated with the intron 9 mutation (Kruskal-Wallis p < 0.0001). Cumulative genotype frequencies predict approximately 0.4% severely deficient and 25% overproducing individuals in both populations. Rapid and low-cost screening of patients with multiplex MASP2 PCR-SSP could be used to identify clinical conditions where MASP-2 (or MAp19) levels may be disease modifying, possibly improving disease outcome through early therapeutic and preventive measures.
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