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Baker Frost D, Savchenko A, Takamura N, Wolf B, Fierkens R, King K, Feghali-Bostwick C. A Positive Feedback Loop Exists between Estradiol and IL-6 and Contributes to Dermal Fibrosis. Int J Mol Sci 2024; 25:7227. [PMID: 39000334 PMCID: PMC11241801 DOI: 10.3390/ijms25137227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2024] [Revised: 06/23/2024] [Accepted: 06/28/2024] [Indexed: 07/16/2024] Open
Abstract
Systemic sclerosis (SSc) is characterized by dermal fibrosis with a female predominance, suggesting a hormonal influence. Patients with SSc have elevated interleukin (IL)-6 levels, and post-menopausal women and older men also have high estradiol (E2) levels. In the skin, IL-6 increases the enzymatic activity of aromatase, thereby amplifying the conversion of testosterone to E2. Therefore, we hypothesized that an interplay between E2 and IL-6 contributes to dermal fibrosis. We used primary dermal fibroblasts from healthy donors and patients with diffuse cutaneous (dc)SSc, and healthy donor skin tissues stimulated with recombinant IL-6 and its soluble receptor (sIL-6R) or E2. Primary human dermal fibroblasts and tissues from healthy donors stimulated with IL-6+sIL-6R produced E2, while E2-stimulated dermal tissues and fibroblasts produced IL-6. Primary dermal fibroblasts from healthy donors treated with IL-6+sIL-6R and the aromatase inhibitor anastrozole (ANA) and dcSSc fibroblasts treated with ANA produced less fibronectin (FN), type III collagen A1 (Col IIIA1), and type V collagen A1 (Col VA1). Finally, dcSSc dermal fibroblasts treated with the estrogen receptor inhibitor fulvestrant also generated less FN, Col IIIA1, and Col VA1. Our data show that IL-6 exerts its pro-fibrotic influence in human skin in part through E2 and establish a positive feedback loop between E2 and IL-6.
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Affiliation(s)
- DeAnna Baker Frost
- Department of Medicine, Division of Rheumatology and Immunology, Medical University of South Carolina, 96 Jonathan Lucas Street, Suite 822, MSC 637, Charleston, SC 29425, USA;
| | - Alisa Savchenko
- College of Osteopathic Medicine, Rocky Vista University, 4130 Rocky Vista Way, Billings, MT 59106, USA;
| | - Naoko Takamura
- Department of Environmental Immuno-Dermatology, Yokohama City University Graduate School of Medicine, Yokohama 236-0004, Kanagawa, Japan;
| | - Bethany Wolf
- Department of Public Health Sciences, Medical University of South Carolina, 135 Cannon Street, Room 305F, Charleston, SC 29425, USA;
| | - Roselyn Fierkens
- Barabara Davis Center, Department of Pediatrics, University of Colorado, School of Medicine, M20-3201N, 1775 Aurora Court, Aurora, CO 80045, USA;
| | - Kimberly King
- School of Medicine, Morehouse College, 720 Westview Drive, Atlanta, GA 30310, USA;
| | - Carol Feghali-Bostwick
- Department of Medicine, Division of Rheumatology and Immunology, Medical University of South Carolina, 96 Jonathan Lucas Street, Suite 822, MSC 637, Charleston, SC 29425, USA;
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Histoarchitecture of the fibrillary matrix of human fetal posterior tibial tendons. Sci Rep 2022; 12:17922. [PMID: 36289254 PMCID: PMC9606372 DOI: 10.1038/s41598-022-19695-3] [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: 11/04/2021] [Accepted: 09/02/2022] [Indexed: 01/20/2023] Open
Abstract
Adult tendons are highly differentiated. In mature individuals, tendon healing after an injury occurs through fibrotic tissue formation. Understanding the intrinsic reparative properties of fetal tendons would help to understand the maturation tissue process and tendon tissue repair. The present study evaluated the evolution of histoarchitecture, cellularity and the distribution of collagens I, III and V in the posterior tibial tendon in human fetuses at different gestational ages. Morphological profiles were assessed in nine fresh spontaneously aborted fetuses (Group I: five fetuses aged between 22 and 28 weeks of gestation; Group II: four fetuses aged between 32 and 38 weeks of gestation), characterized by a combination of histology, fluorescence and immunohistochemistry. In Group I, the posterior tibial tendon showed statistically significant greater cellularity and presence of collagen III and V than in Group II tendon, which showed a predominance of collagenous I and a better organization of the extracellular matrix compared with Group I tendons. In addition, a statistically significant higher rate of CD90, a marker of mesenchymal cells, was found in Group I tendons. In fetuses with gestational age between 22 and 28 weeks, the posterior tibialis tendons showed a thin and disorganized fibrillar structure, with an increase in collagen III and V fibers and mesenchymal cells. In the posterior tibialis tendons of fetuses with gestational age between 32 and 38 weeks, the fibrillar structure was thicker with a statistically significant increase in type I collagen and decreased cellularity.
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Asano Y. Insights Into the Preclinical Models of SSc. CURRENT TREATMENT OPTIONS IN RHEUMATOLOGY 2021. [DOI: 10.1007/s40674-021-00187-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Marangoni RG, Korman BD, Parra ER, Velosa APP, Barbeiro HV, Martins V, Dos Santos ABG, Soriano F, Teodoro WR, Silva PL, Tourtellotte W, Capelozzi VL, Varga J, Yoshinari NH. Pathological pulmonary vascular remodeling is induced by type V collagen in a model of scleroderma. Pathol Res Pract 2021; 220:153382. [PMID: 33647866 DOI: 10.1016/j.prp.2021.153382] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 02/10/2021] [Accepted: 02/12/2021] [Indexed: 10/22/2022]
Abstract
OBJECTIVE The pulmonary vascular remodeling in systemic sclerosis (SSc) is poorly understood and animal models are lacking. Type V collagen (COLV) is elevated in SSc and is implicated in the pathogenesis, and immunization with human COLV induces SSc-like skin and lung changes in rabbits and mice. Here we tested the hypothesis that COLV immunization will induce pathological and functional changes that phenocopy SSc-associated pulmonary vascular disease. METHODS Pulmonary vascular changes in rabbits immunized with human COLV were extensively characterized by a combination of histology, electron microscopy and immunohistochemistry. Physiologic changes induced by COLV in explanted pulmonary artery rings were evaluated. The pattern of histopathologic alterations and gene expression induced in immunized rabbits were compared to those in SSc patients. RESULTS COLV immunization was accompanied by striking pulmonary vascular abnormalities, characterized by reduced capillary density, perivascular inflammation, endothelial cell injury and collagen accumulation, that closely phenocopy changes seen in SSc patients. Moreover, pulmonary arteries from immunized rabbits showed impaired ex vivo vascular relaxation. Expression of COL5A2 was significantly increased in the lungs from immunized rabbits (p = 0.02), as well as in patients with SSc (P = 0.02). CONCLUSION COLV immunity in rabbits is associated with marked vascular remodeling in the lung that phenocopies early-stage human SSc-associated pulmonary vascular disease. COLV immunization therefore represents a novel approach to model SSc pulmonary vascular pathology. Moreover, our findings suggest that COLV might represent a novel pathogenic autoantigen in SSc and future studies with the present model should be developed for possible association with PAH.
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Affiliation(s)
- Roberta Goncalves Marangoni
- Rheumatology Division, Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil; Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA; Division of Allergy, Immunology and Rheumatology, University of Rochester Medical Center, Rochester, NY, USA.
| | - Benjamin D Korman
- Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA; Division of Allergy, Immunology and Rheumatology, University of Rochester Medical Center, Rochester, NY, USA
| | - Edwin R Parra
- Department of Translational Molecular Pathology, The University of Texas, MD Anderson Cancer Center, Houston, TX, USA
| | - Ana Paula P Velosa
- Rheumatology Division, Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil
| | - Hermes V Barbeiro
- Clinical Laboratory in Emergency Medicine, Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil
| | - Vanessa Martins
- Department of Translational Molecular Pathology, The University of Texas, MD Anderson Cancer Center, Houston, TX, USA
| | - Angela B G Dos Santos
- Department of Translational Molecular Pathology, The University of Texas, MD Anderson Cancer Center, Houston, TX, USA
| | - Francisco Soriano
- Clinical Laboratory in Emergency Medicine, Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil
| | - Walcy R Teodoro
- Rheumatology Division, Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil
| | - Pedro Leme Silva
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Brazil
| | - Warren Tourtellotte
- Department of Pathology, Neurology and Neurosurgery, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Vera L Capelozzi
- Department of Translational Molecular Pathology, The University of Texas, MD Anderson Cancer Center, Houston, TX, USA
| | - John Varga
- Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Natalino H Yoshinari
- Rheumatology Division, Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil
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Velosa APP, Brito L, de Jesus Queiroz ZA, Carrasco S, Tomaz de Miranda J, Farhat C, Goldenstein-Schainberg C, Parra ER, de Andrade DCO, Silva PL, Capelozzi VL, Teodoro WR. Identification of Autoimmunity to Peptides of Collagen V α1 Chain as Newly Biomarkers of Early Stage of Systemic Sclerosis. Front Immunol 2021; 11:604602. [PMID: 33643291 PMCID: PMC7907509 DOI: 10.3389/fimmu.2020.604602] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 12/29/2020] [Indexed: 02/06/2023] Open
Abstract
Patients with Systemic sclerosis (SSc) presents immune dysregulation, vasculopathy, and fibrosis of the skin and various internal organs. Pulmonary fibrosis leads to SSc-associated interstitial lung disease (ILD), which is the main cause of morbidity and mortality in SSc. Recently autoimmunity to type V collagen (Col V) has been characterized in idiopathic pulmonary fibrosis and show promise to be related to the development in SSc. Our aim was to evaluate autoimmunity to Col V α1(V) and α2(V) chains and to the antigenic peptides of these Col V chains in early-SSc sera employing lung tissue of SSc-ILD, as antigen source. We found that sera samples from patients with early-SSc were reactive to Col V (41.18%) and presented immunoreactivity for Col5A1(1.049) and Col5A1(1.439) peptides. The IgG isolated from early-SSc patients-anti-Col V positive sera (anti-ColV IgG) was adsorbed with α1(V) chain (anti-ColV IgG/ads-α1(V)) and α2(V) chain (anti-ColV IgG/ads-α2(V)) and biotinylated to evaluate the spectrum of reactivity in SSc-ILD patients lung biopsies by immunofluorescence. The SSc-ILD lung tissue samples immunostained with anti-ColV IgG showed increased green fluorescence in the vascular basement membrane, bronchiolar smooth muscle, and adventitial layer, contrasting with the tenue immunostaining in control lungs. Col V protein expression in these pulmonary compartments immunostained with early-SSc anti-ColV IgG was confirmed by immune colocalization assays with commercial anti-human Col V antibodies. In addition, SSc-ILD lung tissues immunostained with anti-ColV IgG/ads-α1(V) (sample in which Col V α1 chain-specific antibodies were removed) showed decreased green fluorescence compared to anti-ColV IgG and anti-ColV IgG/ads-α2(V). Our data show that autoimmunity to Col V in early-SSc was related to peptides of the α1(V) chain, suggesting that these antibodies could be biomarkers of SSc stages and potential target of immunotherapy with Col V immunogenic peptides.
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Affiliation(s)
- Ana Paula Pereira Velosa
- Rheumatology Division of the Hospital das Clinicas FMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Lais Brito
- Rheumatology Division of the Hospital das Clinicas FMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | | | - Solange Carrasco
- Rheumatology Division of the Hospital das Clinicas FMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Jurandir Tomaz de Miranda
- Rheumatology Division of the Hospital das Clinicas FMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Cecília Farhat
- Department of Pathology of the Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Cláudia Goldenstein-Schainberg
- Rheumatology Division of the Hospital das Clinicas FMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Edwin Roger Parra
- Department of Pathology of the Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | | | - Pedro Leme Silva
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Centro de Ciências da Saúde, Rio de Janeiro, Brazil
- National Institute of Science and Technology for Regenerative Medicine, Rio de Janeiro, Brazil
| | - Vera Luiza Capelozzi
- Department of Pathology of the Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Walcy Rosolia Teodoro
- Rheumatology Division of the Hospital das Clinicas FMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
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Junqueira JJM, Lourenço JD, da Silva KR, Cervilha DADB, da Silveira LKR, Correia AT, Silva LEDF, Teodoro WR, Tibério IDFLC, Barbosa AP, Lopes FDTQDS. Decreased Bone Type I Collagen in the Early Stages of Chronic Obstructive Pulmonary Disease (COPD). COPD 2020; 17:575-586. [PMID: 32814449 DOI: 10.1080/15412555.2020.1808605] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Smoking is the main risk factor for the development of chronic obstructive pulmonary disease (COPD) and is known to have deleterious effects on bone metabolism. However, the effects on bone collagen matrix during the development of COPD are unclear. The aim of this study was to evaluate the temporal effect of cigarette smoke exposure on bone type I collagen during COPD development in a cigarette smoke-induced model. C57BL/6 mice were allocated to three groups: control (C), animals exposed to filtered air for 1, 3 and 6 months; cigarette smoke (S), animals exposed to cigarette smoke for 1, 3 and 6 months; provisional smoking (PS), animals exposed to cigarette smoke for 3 months, followed by another 3 months of filtered air exposure. Evaluation of the respiratory mechanics and alveolar enlargement were performed. Femoral and tibial extraction was also performed to evaluate the type I collagen by immunofluorescence and COL1A1 gene expression. Exposure to cigarette smoke led to an alveolar enlargement and progressive reduction in lung tissue resistance and elastance, progressive reduction of type I collagen and reduction in COL1A1 gene expression. Although we did not observe any improvement in the functional and histological parameters in the provisional smoking group, we detected an increase in COL1A1 gene expression. A worsening in bone collagen matrix is part of the initial physiopathological events during COPD development and the smoking cessation induced an evident recovery of COL1A1 expression, possibly to attempt at tissue repair.
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Affiliation(s)
- Jader Joel Machado Junqueira
- Department of Medicine, Laboratory of Experimental Therapeutics (LIM-20), School of Medicine, University of São Paulo, São Paulo, SP, Brazil
| | - Juliana Dias Lourenço
- Department of Medicine, Laboratory of Experimental Therapeutics (LIM-20), School of Medicine, University of São Paulo, São Paulo, SP, Brazil
| | - Kaique Rodrigues da Silva
- Department of Medicine, Laboratory of Experimental Therapeutics (LIM-20), School of Medicine, University of São Paulo, São Paulo, SP, Brazil
| | - Daniela Aparecida de Brito Cervilha
- Department of Medicine, Laboratory of Experimental Therapeutics (LIM-20), School of Medicine, University of São Paulo, São Paulo, SP, Brazil
| | | | - Aristides Tadeu Correia
- Department of Medicine, Laboratory of Experimental Therapeutics (LIM-20), School of Medicine, University of São Paulo, São Paulo, SP, Brazil
| | - Larissa Emidio de França Silva
- Department of Medicine, Laboratory of Experimental Therapeutics (LIM-20), School of Medicine, University of São Paulo, São Paulo, SP, Brazil
| | - Walcy Rosolia Teodoro
- Rheumatology Division (LIM-17), School of Medicine, University of São Paulo, São Paulo, SP, Brazil
| | | | - Alexandre Póvoa Barbosa
- Department of Medicine, Laboratory of Experimental Therapeutics (LIM-20), School of Medicine, University of São Paulo, São Paulo, SP, Brazil
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Barbosa AP, Lourenço JD, Junqueira JJM, Larissa Emidio de França S, Martins JS, Oliveira Junior MC, Begalli I, Velosa APP, Olivo CR, Bastos TB, Jorgetti V, Rodolfo de Paula V, Teodoro WR, Lopes FD. The deleterious effects of smoking in bone mineralization and fibrillar matrix composition. Life Sci 2020; 241:117132. [DOI: 10.1016/j.lfs.2019.117132] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Revised: 10/31/2019] [Accepted: 11/29/2019] [Indexed: 12/17/2022]
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8
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Teodoro WR, de Jesus Queiroz ZA, Dos Santos LA, Catanozi S, Dos Santos Filho A, Bueno C, Vendramini MBG, Fernezlian SDM, Eher EM, Sampaio-Barros PD, Pasoto SG, Lopes FDTQS, Velosa APP, Capelozzi VL. Proposition of a novel animal model of systemic sclerosis induced by type V collagen in C57BL/6 mice that reproduces fibrosis, vasculopathy and autoimmunity. Arthritis Res Ther 2019; 21:278. [PMID: 31829272 PMCID: PMC6907238 DOI: 10.1186/s13075-019-2052-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 11/05/2019] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Type V collagen (Col V) has the potential to become an autoantigen and has been associated with the pathogenesis of systemic sclerosis (SSc). We characterized serological, functional, and histopathological features of the skin and lung in a novel SSc murine model induced by Col V immunization. METHODS Female C57BL/6 mice (n = 19, IMU-COLV) were subcutaneously immunized with two doses of Col V (125 μg) emulsified in complete Freund adjuvant, followed by two intramuscular boosters. The control group (n = 19) did not receive Col V. After 120 days, we examined the respiratory mechanics, serum autoantibodies, and vascular manifestations of the mice. The skin and lung inflammatory processes and the collagen gene/protein expressions were analyzed. RESULTS Vascular manifestations were characterized by endothelial cell activity and apoptosis, as shown by the increased expression of VEGF, endothelin-1, and caspase-3 in endothelial cells. The IMU-COLV mice presented with increased tissue elastance and a nonspecific interstitial pneumonia (NSIP) histologic pattern in the lung, combined with the thickening of the small and medium intrapulmonary arteries, increased Col V fibers, and increased COL1A1, COL1A2, COL3A1, COL5A1, and COL5A2 gene expression. The skin of the IMU-COLV mice showed thickness, epidermal rectification, decreased papillary dermis, atrophied appendages, and increased collagen, COL5A1, and COL5A2 gene expression. Anti-collagen III and IV and ANA antibodies were detected in the sera of the IMU-COLV mice. CONCLUSION We demonstrated that cutaneous, vascular, and pulmonary remodeling are mimicked in the Col V-induced SSc mouse model, which thus represents a suitable preclinical model to study the mechanisms and therapeutic approaches for SSc.
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Affiliation(s)
- Walcy Rosolia Teodoro
- Rheumatology Division of the Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo, FMUSP, São Paulo, SP, BR, Av. Dr. Arnaldo, 455, sala 3124, Cerqueira César, São Paulo, SP, 01246-903, Brazil.
| | - Zelita Aparecida de Jesus Queiroz
- Rheumatology Division of the Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo, FMUSP, São Paulo, SP, BR, Av. Dr. Arnaldo, 455, sala 3124, Cerqueira César, São Paulo, SP, 01246-903, Brazil
| | - Lais Araujo Dos Santos
- Rheumatology Division of the Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo, FMUSP, São Paulo, SP, BR, Av. Dr. Arnaldo, 455, sala 3124, Cerqueira César, São Paulo, SP, 01246-903, Brazil
| | - Sergio Catanozi
- Lipid Laboratory of the Endocrinology and Metabology Discipline of the Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo, FMUSP, Sao Paulo, SP, Brazil
| | - Antonio Dos Santos Filho
- Rheumatology Division of the Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo, FMUSP, São Paulo, SP, BR, Av. Dr. Arnaldo, 455, sala 3124, Cerqueira César, São Paulo, SP, 01246-903, Brazil
| | - Cleonice Bueno
- Rheumatology Division of the Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo, FMUSP, São Paulo, SP, BR, Av. Dr. Arnaldo, 455, sala 3124, Cerqueira César, São Paulo, SP, 01246-903, Brazil
| | - Margarete B G Vendramini
- Rheumatology Division of the Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo, FMUSP, São Paulo, SP, BR, Av. Dr. Arnaldo, 455, sala 3124, Cerqueira César, São Paulo, SP, 01246-903, Brazil
| | - Sandra de Morais Fernezlian
- Department of Pathology of the Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo, FMUSP, Sao Paulo, SP, Brazil
| | - Esmeralda M Eher
- Department of Pathology of the Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo, FMUSP, Sao Paulo, SP, Brazil
| | - Percival D Sampaio-Barros
- Rheumatology Division of the Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo, FMUSP, São Paulo, SP, BR, Av. Dr. Arnaldo, 455, sala 3124, Cerqueira César, São Paulo, SP, 01246-903, Brazil
| | - Sandra Gofinet Pasoto
- Rheumatology Division of the Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo, FMUSP, São Paulo, SP, BR, Av. Dr. Arnaldo, 455, sala 3124, Cerqueira César, São Paulo, SP, 01246-903, Brazil
| | - Fernanda Degobbi T Q S Lopes
- Experimental Therapy Laboratory of the Department of Clinical Medicine of the Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo, FMUSP, Sao Paulo, SP, Brazil
| | - Ana Paula Pereira Velosa
- Rheumatology Division of the Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo, FMUSP, São Paulo, SP, BR, Av. Dr. Arnaldo, 455, sala 3124, Cerqueira César, São Paulo, SP, 01246-903, Brazil
| | - Vera Luiza Capelozzi
- Department of Pathology of the Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo, FMUSP, Sao Paulo, SP, Brazil
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Ugolini-Lopes MR, Mantovani E, Bonoldi VLN, de Medeiros Ribeiro AC, Bonfá E, Yoshinari N, Andrade D. Anti-collagen type v: a marker of early systemic sclerosis? Adv Rheumatol 2019; 59:19. [PMID: 31088556 DOI: 10.1186/s42358-019-0063-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Accepted: 05/01/2019] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE To evaluate the frequency of anti-collagen type V in humans with early systemic sclerosis (SSc) compared to defined SSc patients and healthy controls, since collagen type V was shown to be overexpressed in early SSc patients' skin and there is no data concerning the presence of this antibody in early stages of human SSc. Experimental studies showed that animal models immunized with collagen type V developed a disease similar to human systemic sclerosis (SSc), with antibodies production, mainly in early stages post-immunization. METHODS Eighty-one female SSc patients were included and divided into two groups: early-SSc (18 patients-EULAR Preliminary Criteria) and defined-SSc (63 patients-ACR Criteria 1980). The control group consisted of 19 healthy women age-matched to Early-SSc group. Anti-collagen type V was performed by ELISA. Data was analyzed by appropriate tests. RESULTS The prevalence of anti-collagen type V in early-SSc, defined-SSc and control groups was respectively 33, 17 and 5% (p = 0.07). SSc patients with anti-collagen type V had shorter disease duration compared to those without this antibody (8.8 ± 5.1 vs. 14.7 ± 8.9, p = 0.006). Likewise, early-SSc patients with anti-collagen V also had a shorter disease duration than patients negative for this antibody (4.6 ± 2.2 vs. 9.7 ± 5.2, p = 0.04). No association with clinical subsets or scleroderma antibodies specificities was observed (p > 0.05). CONCLUSION The production of anti-collagen type V in SSc seems to be an early event independent of other antibodies specificities. Further studies are necessary to determine if the underlying mechanism for this chronology involves a primary immune response to abnormal expression of collagen type V.
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Affiliation(s)
- Michelle R Ugolini-Lopes
- Rheumatology Division, Hospital da Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, São Paulo, SP, Brazil.
| | - Elenice Mantovani
- Rheumatology Division, Hospital da Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, São Paulo, SP, Brazil
| | - Virgínia Lucia N Bonoldi
- Rheumatology Division, Hospital da Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, São Paulo, SP, Brazil
| | | | - Eloisa Bonfá
- Rheumatology Division, Hospital da Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, São Paulo, SP, Brazil
| | - Natalino Yoshinari
- Rheumatology Division, Hospital da Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, São Paulo, SP, Brazil
| | - Danieli Andrade
- Rheumatology Division, Hospital da Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, São Paulo, SP, Brazil
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10
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Atayde SR, Velosa APP, Catanozi S, Del Bianco V, Andrade PC, Rodrigues JEDCM, dos Santos Filho A, Antonangelo L, de Mello SBV, Capelozzi VL, Teodoro WR. Collagen V oral administration decreases inflammation and remodeling of synovial membrane in experimental arthritis. PLoS One 2018; 13:e0201106. [PMID: 30059520 PMCID: PMC6066207 DOI: 10.1371/journal.pone.0201106] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Accepted: 06/10/2018] [Indexed: 12/18/2022] Open
Abstract
Because collagen type V (Col V) can be exposed in tissue injury, we hypothesized that oral administration of this collagen species modulates the inflammation and remodeling of experimental synovitis, avoiding joint destruction, and that the modulation may differ according to the temporal administration. Arthritis (IA, n = 20) was induced in Lewis rats by intraarticular (ia) injection of 500 μg of methylated bovine serum albumin (mBSA) emulsified in complete Freund’s adjuvant (CFA) (10 μl) followed by an intraarticular booster of mBSA (50 μg) in saline (50 μl) administered at 7 and 14 days. The control group received saline (50 μl, ia). After the first intraarticular injection, ten IA animals were supplemented via gavage with Col V (500 μg/300 μl) daily for 30 days (IA/Suppl). The control group received saline (50 μL) and Col V supplement in the same way (Suppl). Col V oral administration in IA/Suppl led to 1) inhibited edema and severe inflammatory cell infiltration, 2) decreased collagen fiber content, 3) decreased collagen type I, 4) inhibited lymphocyte subpopulations and macrophages, 5) inhibited IL-1β, IL-10, IL-17 and TNF-α production and 6) increased expression of caspase-9 in the synovial tissue. In conclusion, Col V supplementation decreased synovial inflammation and the fibrotic response, possibly by increased the apoptosis of inflammatory cells.
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Affiliation(s)
- Silvana Ramos Atayde
- Department of Pathology, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, São Paulo, Brazil
- * E-mail:
| | - Ana Paula Pereira Velosa
- Rheumatology Division, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, São Paulo, Brazil
| | - Sergio Catanozi
- Endocrinology Division (LIM 10), Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, São Paulo, Brazil
| | - Vanessa Del Bianco
- Endocrinology Division (LIM 10), Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, São Paulo, Brazil
| | - Priscila Cristina Andrade
- Department of Pathology, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, São Paulo, Brazil
| | | | - Antonio dos Santos Filho
- Rheumatology Division, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, São Paulo, Brazil
| | - Leila Antonangelo
- Department of Pathology, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, São Paulo, Brazil
| | | | - Vera Luiza Capelozzi
- Department of Pathology, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, São Paulo, Brazil
| | - Walcy Rosolia Teodoro
- Rheumatology Division, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, São Paulo, Brazil
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11
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Intranasal Administration of Type V Collagen Reduces Lung Carcinogenesis through Increasing Endothelial and Epithelial Apoptosis in a Urethane-Induced Lung Tumor Model. Arch Immunol Ther Exp (Warsz) 2016; 64:321-9. [DOI: 10.1007/s00005-016-0390-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 11/30/2015] [Indexed: 12/27/2022]
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Mak KM, Png CYM, Lee DJ. Type V Collagen in Health, Disease, and Fibrosis. Anat Rec (Hoboken) 2016; 299:613-29. [DOI: 10.1002/ar.23330] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Revised: 12/01/2015] [Accepted: 12/23/2015] [Indexed: 12/30/2022]
Affiliation(s)
- Ki M. Mak
- Department of Medical Education/Center for Anatomy and Functional Morphology; Icahn School of Medicine at Mount Sinai; New York New York
| | - Chien Yi M. Png
- Department of Medical Education; Icahn School of Medicine at Mount Sinai; New York New York
| | - Danielle J. Lee
- Department of Medical Education; Icahn School of Medicine at Mount Sinai; New York New York
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13
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Early type I collagen deposition is associated with prognosis in biliary atresia. J Pediatr Surg 2016; 51:379-85. [PMID: 26452701 DOI: 10.1016/j.jpedsurg.2015.08.061] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Revised: 08/13/2015] [Accepted: 08/15/2015] [Indexed: 12/11/2022]
Abstract
BACKGROUND Biliary atresia (BA) is a cholestatic liver disease of children that progresses to hepatic fibrosis. BA is the main indication of pediatric liver transplantation (LTx). Histopathological markers in liver biopsies could be useful for predicting progression to end-stage disease. OBJECTIVE To establish histopathological or immunohistochemical markers in liver biopsies of BA patients and correlate those markers with prognosis. METHOD Histological analysis of biliary alterations and morphometric assessment of liver fibrosis were performed, in addition to indirect immunofluorescence assays (IF) for type I, III, IV and V collagens in initial and final liver biopsies of 36 patients with BA who underwent Kasai hepatoportoenterostomy (KPE) and LTx in the last 20years at a single center. RESULTS Histopathological markers had no correlation with evolutive time until LTx. The perisinusoidal deposition of type III and V collagens was more prominent in the initial biopsies (p<0.01), whereas deposition of type I and IV collagens indicated progression (p<0.01). Patients with large amounts of perisinusoidal type I collagen in the initial biopsies had worse progression time curves until LTx (p=0.04). CONCLUSION Morphometric assessment of perisinusoidal deposition of type I collagen by IF in the initial biopsy can correlate with progression time to LTx in post-surgical BA.
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Godoy CA, Teodoro WR, Velosa APP, Garippo AL, Eher EM, Parra ER, Sotto MN, Capelozzi VL. Unusual remodeling of the hyalinization band in vulval lichen sclerosus by type V collagen and ECM 1 protein. Clinics (Sao Paulo) 2015; 70:356-62. [PMID: 26039953 PMCID: PMC4449483 DOI: 10.6061/clinics/2015(05)09] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Accepted: 02/20/2015] [Indexed: 11/20/2022] Open
Abstract
OBJECTIVES The vulva is the primary site affected in lichen sclerosus, a chronic dermatosis in women that is histologically characterized by a zone of collagen remodeling in the superior dermis. The normal physiological properties of the vulva depend on the assembly of collagen types I (COLI), III (COLIII) and V (COLV), which form heterotypic fibers, and extracellular matrix protein interactions. COLV regulates the heterotypic fiber diameter, and the preservation of its properties is important for maintaining normal tissue architecture and function. In the current work, we analyzed the expression of COLV and its relationship with COLI, COLIII, elastic fibers and extracellular matrix protein 1 in vulvar biopsies from patients with lichen sclerosus. METHODS Skin biopsies from 21 patients with lichen sclerosus, classified according to Hewitt histological criteria, were studied and compared to clinically normal vulvar tissue (N=21). Morphology, immunohistochemistry, immunofluorescence, 3D reconstruction and morphometric analysis of COLI, COLIII, COLV deposition, elastic fibers and extracellular matrix 1 expression in a zone of collagen remodeling in the superior dermis were performed. RESULTS A significant decrease of elastic fibers and extracellular matrix 1 protein was present in the hyalinization zone of lichen sclerosus compared to healthy controls. The non-homogeneous distribution of collagen fibers visualized under immunofluorescence in the hyalinization zone of lichen sclerosus and control skin was confirmed by histomorphometry. Lichen sclerosus dermis shows a significant increase of COLI, COLIII and COLV expression compared to the healthy controls. Significant inverse associations were found between elastic fibers and COLV and between COLV and extracellular matrix 1 expression. A direct association was found between elastic fiber content and extracellular matrix 1 expression. Tridimensional reconstruction of the heterotypic fibers of the lichen sclerosus zone of collagen remodeling confirmed the presence of densely clustered COLV. CONCLUSIONS Increased deposition of abnormal COLV and its correlation with extracellular matrix 1 and elastic fibers suggest that COLV may be a trigger in the pathogenesis of lichen sclerosus.
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Affiliation(s)
- Charles A.P. Godoy
- Department of Pathology, Faculdade de Medicina da Universidade de São Paulo, São Paulo/SP, Brazil
| | - Walcy R. Teodoro
- Division of Rheumatology, Faculdade de Medicina da Universidade de São Paulo, São Paulo/SP, Brazil
| | - Ana Paula P. Velosa
- Division of Rheumatology, Faculdade de Medicina da Universidade de São Paulo, São Paulo/SP, Brazil
| | - Ana Lucia Garippo
- Department of Pathology, Faculdade de Medicina da Universidade de São Paulo, São Paulo/SP, Brazil
| | - Esmeralda Miristeni Eher
- Department of Pathology, Faculdade de Medicina da Universidade de São Paulo, São Paulo/SP, Brazil
| | - Edwin Roger Parra
- Department of Pathology, Faculdade de Medicina da Universidade de São Paulo, São Paulo/SP, Brazil
| | - Mirian N. Sotto
- Department of Dermatology, Faculdade de Medicina da Universidade de São Paulo, São Paulo/SP, Brazil
| | - Vera L. Capelozzi
- Department of Pathology, Faculdade de Medicina da Universidade de São Paulo, São Paulo/SP, Brazil
- *Corresponding author: Vera L. Capelozzi, E-mail:
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15
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Shikh Alsook MK, Gabriel A, Salouci M, Piret J, Alzamel N, Moula N, Denoix JM, Antoine N, Baise E. Characterization of collagen fibrils after equine suspensory ligament injury: an ultrastructural and biochemical approach. Vet J 2015; 204:117-22. [PMID: 25795168 DOI: 10.1016/j.tvjl.2015.02.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Revised: 12/12/2014] [Accepted: 02/09/2015] [Indexed: 11/17/2022]
Abstract
Suspensory ligament (SL) injuries are an important cause of lameness in horses. The mechanical properties of connective tissue in normal and pathological ligaments are mainly related to fibril morphology, as well as collagen content and types. The purpose of this study was to evaluate, using biochemical and ultrastructural approaches, the alterations in collagen fibrils after injury. Eight Warmblood horses with visible signs of injury in only one forelimb SL were selected and specimens were examined by transmission electron microscope (TEM). Collagen types I, III and V were purified by differential salt precipitation after collagen extraction with acetic acid containing pepsin. TEM revealed abnormal organization as well as alterations in the diameter and shape of fibrils after SL injury. The bands corresponding to types I, III and V collagen were assessed by densitometry after sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE). Densitometric analysis indicated that the proportions of type III and type V collagen were higher (P < 0.001) in damaged tissues compared with normal tissues with a mean increase of 20.9% and 17.3%, respectively. Concurrently, a decrease (P < 0.001) in type I collagen within damaged tissues was recorded with a mean decrease of 15.2%. These alterations could be the hallmark of a decrease in the tissue quality and mechanical properties of the ligament. The findings provide new insight for subsequent research on tissue regeneration that may lead to the development of future treatment strategies for SL injury.
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Affiliation(s)
- M K Shikh Alsook
- Anatomy Unit, FARAH Research Centre and Faculty of Veterinary Medicine, University of Liège, Liège, Belgium.
| | - A Gabriel
- Anatomy Unit, FARAH Research Centre and Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - M Salouci
- Anatomy Unit, FARAH Research Centre and Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - J Piret
- Histology Unit, FARAH Research Centre and Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - N Alzamel
- Pathology Unit, FARAH Research Centre and Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - N Moula
- Sustainable Animal Production Unit, FARAH Research Centre and Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - J-M Denoix
- CIRALE -14430 Goustranville, Université Paris-Est, Ecole Nationale Vétérinaire d'Alfort, Paris, France
| | - N Antoine
- Histology Unit, FARAH Research Centre and Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - E Baise
- FARAH Research Centre and Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
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Martin P, Teodoro WR, Velosa APP, de Morais J, Carrasco S, Christmann RB, Goldenstein-Schainberg C, Parra ER, Katayama ML, Sotto MN, Capelozzi VL, Yoshinari NH. Abnormal collagen V deposition in dermis correlates with skin thickening and disease activity in systemic sclerosis. Autoimmun Rev 2012; 11:827-35. [PMID: 22406224 DOI: 10.1016/j.autrev.2012.02.017] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Accepted: 02/20/2012] [Indexed: 01/18/2023]
Abstract
OBJECTIVE The physiological and mechanical properties of the skin, the primary tissue affected by systemic sclerosis, depend on the assembly of collagen types I, III and V, which form heterotypic fibers. Collagen V (COLV) regulates heterotypic fiber diameter, and the maintenance of its properties is important for maintaining normal tissue architecture and function. Based on a COLV-induced experimental SSc model, in which overexpression of abnormal COLV was a prominent feature, we assumed that this abnormality could be present in SSc patients and could be correlated to disease duration, skin thickening and disease activity. METHODS Skin biopsies from 18 patients (6 early-stage and 12 late-stage) and 10 healthy controls were studied. Skin thickening assessment was performed with the Modified Rodnan Skin Score (MRSS), and activity was calculated using the Valentini Disease Activity Index. Morphology, morphometry of COLV deposition in dermis, as well as, quantitative RT-PCR and 3D-reconstruction of the dermal fibroblast culture were performed. RESULTS Structurally abnormal COLV was overexpressed in SSc skin, mainly in the early stages of the disease, when compared to normal controls and late-stage. A positive correlation between COLV expression and MRSS and disease activity was observed. Collagen V alpha-1 and alpha-2 mRNA expression levels were higher in SSc. Tridimensional reconstruction of SSc dermal heterotypic fibers confirmed the presence of atypical COLV. CONCLUSION Increased synthesis of abnormal COLV and its correlation with disease stage, activity and MRSS suggest that this collagen can be a possible trigger involved in the pathogenesis of SSc.
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Affiliation(s)
- Patricia Martin
- Division of Rheumatology, Universidade de São Paulo, São Paulo-SP, Brazil
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Parra ER, Aguiar AC, Teodoro WR, de Souza R, Yoshinari NH, Capelozzi VL. Collagen V and vascular injury promote lung architectural changes in systemic sclerosis. CLINICAL RESPIRATORY JOURNAL 2010; 3:135-42. [PMID: 20298396 DOI: 10.1111/j.1752-699x.2008.00118.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Systemic sclerosis (SSc) is a multisystem disorder characterized by inflammation, fibrosis and vascular damage. The aim of this study was to evaluate the interactions between basement membrane disruption, endothelial injury and collagen V deposition on the vascular wall, as well as their association with pulmonary function tests in patients with SSc. METHOD The endothelial apoptosis was assessed by TUNEL and electron microscopy, and quantified through the point-counting technique. To evaluate basement membrane integrity, laminin immunostaining and electron microscopy were used. Immunofluorescence and morphometric analysis were used to determine the amount of collagen V in the vascular walls in 23 open lung biopsies of patients with SSc without pulmonary hypertension. Normal lung tissue was obtained from five individuals who had died of traumatic injuries. RESULTS The apoptosis index in SSc was higher in the endothelial cells (13.83 +/- 6.83) when compared with the control (2.51 +/- 2.06) group (P < 0.001) and confirmed by electron microscopy. We observed an important disruption of the basement membrane on the vascular wall shown by discontinuous laminin immunostaining and electron microscopy. An increase in collagen V on the vascular wall of the SSc group was observed (45.28 +/- 13.21), when compared with control group (22.90 +/- 4.13, P < 0.001), and this difference was statistically significant. An inverse correlation was found between vital capacity, forced vital capacity, forced expiratory volume in 1 s, vascular collagen V and endothelial apoptosis (P < 0.05). CONCLUSIONS We conclude that the endothelial apoptosis and vascular collagen V interaction reinforce the vascular pathway in the SSc pathogenesis. Further studies are needed to determine whether this relationship is causal or consequential.
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Affiliation(s)
- Edwin Roger Parra
- Departament of Pathology, Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil.
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18
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Antunes MA, Abreu SC, Silva AL, Parra-Cuentas ER, Ab'Saber AM, Capelozzi VL, Ferreira TPT, Martins MA, Silva PMR, Rocco PRM. Sex-specific lung remodeling and inflammation changes in experimental allergic asthma. J Appl Physiol (1985) 2010; 109:855-63. [PMID: 20634353 DOI: 10.1152/japplphysiol.00333.2010] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
There is evidence that sex and sex hormones influence the severity of asthma. Airway and lung parenchyma remodeling and the relationship of ultrastructural changes to airway responsiveness and inflammation in male, female, and oophorectomized mice (OVX) were analyzed in experimental chronic allergic asthma. Seventy-two BALB/c mice were randomly divided into three groups (n=24/each): male, female, and OVX mice, whose ovaries were removed 7 days before the start of sensitization. Each group was further randomized to be sensitized and challenged with ovalbumin (OVA) or saline. Twenty-four hours after the last challenge, collagen fiber content in airways and lung parenchyma, the volume proportion of smooth muscle-specific actin in alveolar ducts and terminal bronchiole, the amount of matrix metalloproteinase (MMP)-2 and MMP-9, and the number of eosinophils and interleukin (IL)-4, IL-5, and transforming growth factor (TGF)-β levels in bronchoalveolar lavage fluid were higher in female than male OVA mice. The response of OVX mice was similar to that of males, except that IL-5 remained higher. Nevertheless, after OVA provocation, airway responsiveness to methacholine was higher in males compared with females and OVX mice. In conclusion, sex influenced the remodeling process, but the mechanisms responsible for airway hyperresponsiveness seemed to differ from those related to remodeling.
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Affiliation(s)
- Mariana A Antunes
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Centro de Ciências da Saúde, Avenida Carlos Chagas Filho, s/n, Bloco G-014, Ilha do Fundão 21941-902, Rio de Janeiro, RJ, Brazil
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Parra ER, Bielecki LC, Ribeiro JMDFP, Andrade Balsalobre FD, Teodoro WR, Capelozzi VL. Association between decreases in type V collagen and apoptosis in mouse lung chemical carcinogenesis: a preliminary model to study cancer cell behavior. Clinics (Sao Paulo) 2010; 65:425-32. [PMID: 20454501 PMCID: PMC2862677 DOI: 10.1590/s1807-59322010000400012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2009] [Revised: 12/17/2009] [Accepted: 12/23/2009] [Indexed: 02/24/2023] Open
Abstract
OBJECTIVE The importance of type V collagen and its relationships with other types of collagen and with vascular and epithelial apoptosis were studied in a model of chemical carcinogenesis in the mouse lung. METHODS TWO GROUPS OF MALE BALB/C MICE WERE STUDIED: a) animals that received two intraperitoneal doses of 3 g/kg urethane carcinogen (urethane group = 24); and b) animals submitted to a sham procedure, comparable to the test group (control group = 7). Both groups were sacrificed after 120 days. In situ detection of apoptosis, immunohistochemistry, immunofluorescence and histomorphometry were used to evaluate the fraction occupied by the tumor, vascular and epithelial apoptosis, and type V, III and I collagen fibers in the lung parenchyma from both groups. RESULTS The lung parenchyma from the urethane group showed low fractions of vascular and epithelial apoptosis as well as reduced type V collagen fibers when compared to the control group. A significant direct association was found between type V and III collagen fibers and epithelial apoptosis, type V collagen fibers and vascular apoptosis, and type V and type I collagen fibers. CONCLUSION The results show that a direct link between low amounts of type V collagen and decreased cell apoptosis may favor cancer cell growth in the mouse lung after chemical carcinogenesis, suggesting that strategies aimed at preventing decreased type V collagen synthesis or local responses to reduced apoptosis may have a greater impact in lung cancer control.
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Affiliation(s)
- Edwin Roger Parra
- Departament of Pathology, Faculdade de Medicina da Universidade de São Paulo, Sao Paulo, Brazil.
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Parra ER, Teodoro WR, de Morais J, Katayama MLH, de Souza R, Yoshinari NH, Capelozzi VL. Increased mRNA expression of collagen V gene in pulmonary fibrosis of systemic sclerosis. Eur J Clin Invest 2010; 40:110-20. [PMID: 19968698 DOI: 10.1111/j.1365-2362.2009.02224.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND Collagen V shows promise as an inducer of interstitial lung fibrosis in experimental systemic sclerosis (SSc). MATERIALS AND METHODS Remodelling of the pulmonary interstitium was evaluated based on the clinical data and open lung biopsies from 15 patients with SSc. Normal lung tissues obtained from eight individuals who died of traumatic injuries were used as control group. Immunofluorescence, immunohistochemistry, morphometry, tri-dimensional reconstruction and a real-time polymerase chain reaction were used to evaluate the quantity, structure and molecular chains of collagen V. The impact of these markers was tested on clinical data. RESULTS The main difference in collagen V content between SSc patients and the control group was an increased, abnormal and distorted fibre deposition in the alveolar septa and the pre-acinar artery wall. The lungs from SSc patients presented [alpha1(V)] and [alpha2(V)] mRNA chain expression increased, but [alpha2(V)] was proportionally increased compared with the control group. High levels of collagen V were inversely associated with vital capacity (r = -0.72; P = 0.002), forced vital capacity (r = -0.76; P < 0.001), forced expiratory volume in 1-s (r = -0.89; P < 0.001) and diffusing capacity for carbon monoxide (r = -0.62; P = 0.04). CONCLUSIONS Abnormal collagen V fibres are overproduced in lungs from SSc patients and may play an important role in the pathogenesis of the disease as this molecule regulates tissue collagen assembly. The aberrant histoarchitecture observed in SSc can be related to the overexpression of the [alpha2(V)] gene of unknown origin.
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Affiliation(s)
- E R Parra
- Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil.
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Velosa APP, Teodoro WR, dos Anjos DM, Konno R, Oliveira CC, Katayama MLH, Parra ER, Capelozzi VL, Yoshinari NH. Collagen V-induced nasal tolerance downregulates pulmonary collagen mRNA gene and TGF-beta expression in experimental systemic sclerosis. Respir Res 2010; 11:1. [PMID: 20047687 PMCID: PMC2817654 DOI: 10.1186/1465-9921-11-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2009] [Accepted: 01/04/2010] [Indexed: 11/10/2022] Open
Abstract
Background The purpose of this study was to evaluate collagen deposition, mRNA collagen synthesis and TGF-beta expression in the lung tissue in an experimental model of scleroderma after collagen V-induced nasal tolerance. Methods Female New Zealand rabbits (N = 12) were immunized with 1 mg/ml of collagen V in Freund's adjuvant (IM). After 150 days, six immunized animals were tolerated by nasal administration of collagen V (25 μg/day) (IM-TOL) daily for 60 days. The collagen content was determined by morphometry, and mRNA expressions of types I, III and V collagen were determined by Real-time PCR. The TGF-beta expression was evaluated by immunostaining and quantified by point counting methods. To statistic analysis ANOVA with Bonferroni test were employed for multiple comparison when appropriate and the level of significance was determined to be p < 0.05. Results IM-TOL, when compared to IM, showed significant reduction in total collagen content around the vessels (0.371 ± 0.118 vs. 0.874 ± 0.282, p < 0.001), bronchioles (0.294 ± 0.139 vs. 0.646 ± 0.172, p < 0.001) and in the septal interstitium (0.027 ± 0.014 vs. 0.067 ± 0.039, p = 0.026). The lung tissue of IM-TOL, when compared to IM, showed decreased immunostaining of types I, III and V collagen, reduced mRNA expression of types I (0.10 ± 0.07 vs. 1.0 ± 0.528, p = 0.002) and V (1.12 ± 0.42 vs. 4.74 ± 2.25, p = 0.009) collagen, in addition to decreased TGF-beta expression (p < 0.0001). Conclusions Collagen V-induced nasal tolerance in the experimental model of SSc regulated the pulmonary remodeling process, inhibiting collagen deposition and collagen I and V mRNA synthesis. Additionally, it decreased TGF-beta expression, suggesting a promising therapeutic option for scleroderma treatment.
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Affiliation(s)
- Ana Paula P Velosa
- Rheumatology Division of the School of Medicine of the University of São Paulo, São Paulo, Brazil
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Souza P, Rizzardi F, Noleto G, Atanazio M, Bianchi O, Parra ER, Teodoro WR, Carrasco S, Velosa APP, Fernezlian S, Ab'saber AM, Antonângelo L, Takagaki T, Schainberg CG, Yoshinari NH, Capelozzi VL. Refractory remodeling of the microenvironment by abnormal type V collagen, apoptosis, and immune response in non-small cell lung cancer. Hum Pathol 2009; 41:239-48. [PMID: 19828174 DOI: 10.1016/j.humpath.2009.07.018] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2009] [Revised: 07/22/2009] [Accepted: 07/23/2009] [Indexed: 10/20/2022]
Abstract
Collagen V shows promise as an inducer of the death response via caspases. Remodeling of the microenvironment by collagen V, tumoral/vascular apoptosis, and the immune response were evaluated, based on the prognosis of 65 patients with surgically excised non-small cell lung cancer. Immunofluorescence, immunohistochemistry, morphometry, tridimensional reconstruction, and a real-time polymerase chain reaction were used to evaluate the amount, structure, and molecular chains of collagen V, tumoral and vascular apoptosis, immune cells, and microvessel density. The impact of these markers was tested on follow-up until death from recurrent lung cancer occurred. A decreased and abnormal synthesis of collagen V was found to lead to increased angiogenesis due to a low endothelial death rate and a low immune response. A Cox model analysis, controlled for the lymph node stage, demonstrated that only collagen V and vascular apoptosis variables were significantly associated with survival time. A point at the median for collagen V and vascular apoptosis divided patients into 2 groups, each with a distinctive prognosis. Those with a collagen V higher than 9.40% and vascular apoptosis higher than 1.09% had a low risk of death (0.27 and 0.41, respectively) compared to those with a collagen V lower than 9.40% and vascular apoptosis lower than 1.09%. Collagen V and vascular apoptosis in resected non-small cell lung cancer was strongly related to the prognosis, suggesting that strategies aimed at preventing low collagen V synthesis, or local responses to low vascular apoptosis may have a greater impact in lung cancer treatment.
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Affiliation(s)
- Paola Souza
- Departament of Pathology, Faculdade de Medicina da Universidade de São Paulo 01246-903, Brazil
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Bei R, Masuelli L, Palumbo C, Tresoldi I, Scardino A, Modesti A. Long-Lasting Tissue Inflammatory Processes Trigger Autoimmune Responses to Extracellular Matrix Molecules. Int Rev Immunol 2009; 27:137-75. [DOI: 10.1080/08830180801939280] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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de Oliveira CC, Velosa APP, Parra ER, Capelozzi VL, Teodoro WR, Yoshinari NH. Histomorphometric analysis of cutaneous remodeling in the early stage of the scleroderma model. Clinics (Sao Paulo) 2009; 64:577-83. [PMID: 19578663 PMCID: PMC2705156 DOI: 10.1590/s1807-59322009000600014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2008] [Accepted: 03/09/2009] [Indexed: 11/21/2022] Open
Abstract
INTRODUCTION/OBJECTIVES Systemic sclerosis, or scleroderma, is a rheumatic disease characterized by autoimmunity, vasculopathy, and fibrosis of the skin and several internal organs. In the present study, our aim was to assess the skin alterations in animals with scleroderma during the first stages of disease induction. METHODS To induce scleroderma, female New Zealand rabbits (n = 12) were subcutaneously immunized with 1 mg/ml of collagen V (Col V) in complete Freund's adjuvant, twice with a thirty-day interval. Fifteen days later, the animals received an intramuscular booster with type V collagen in incomplete Freund's adjuvant, twice with a fifteen-day interval. The control group was inoculated with 1 ml of 10 mM acetic acid solution diluted with an equal amount of Freund's adjuvant. Serial dorsal skin biopsies were performed at 7, 15, and 30 days and stained with H&E, Masson's trichrome and Picrosírius for morphological and morphometric analyses. RESULTS Immunized rabbits presented a significant increase in collagen in skin collected seven days after the first immunization (p=0.05). CONCLUSION The results from this experimental model may be very important to a better understanding of the pathogenic mechanisms involved in the beginning of human SSc. Therapeutic protocols to avoid early remodeling of the skin may lead to promising treatments for SSc in the future.
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Satomi É, Teodoro WR, Parra ER, Fernandes TD, Velosa APP, Capelozzi VL, Yoshinari NH. Changes in histoanatomical distribution of types I, III and V collagen promote adaptative remodeling in posterior tibial tendon rupture. Clinics (Sao Paulo) 2008; 63:9-14. [PMID: 18297201 PMCID: PMC2664193 DOI: 10.1590/s1807-59322008000100003] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2007] [Accepted: 09/18/2007] [Indexed: 11/21/2022] Open
Abstract
INTRODUCTION Posterior tibial tendon dysfunction is a common cause of adult flat foot deformity, and its etiology is unknown. PURPOSE In this study, we characterized the morphologic pattern and distribution of types I, III and V collagen in posterior tibial tendon dysfunction. METHOD Tendon samples from patients with and without posterior tibial tendon dysfunction were stained by immunofluorescence using antibodies against types I, III and V collagen. RESULTS Control samples showed that type V deposited near the vessels only, while surgically obtained specimens displayed type V collagen surrounding other types of collagen fibers in thicker adventitial layers. Type III collagen levels were also increased in pathological specimens. On the other hand, amounts of collagen type I, which represents 95% of the total collagen amount in normal tendon, were decreased in pathological specimens. CONCLUSION Fibrillogenesis in posterior tibial tendon dysfunction is altered due to higher expression of types III and V collagen and a decreased amount of collagen type I, which renders the originating fibrils structurally less resistant to mechanical forces.
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Affiliation(s)
- Érika Satomi
- Department of Rheumatology, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo - São Paulo/SP, Brazil
| | - Walcy R. Teodoro
- Department of Rheumatology, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo - São Paulo/SP, Brazil
| | - Edwin R. Parra
- Department of Pathology, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo - São Paulo/SP, Brazil.
| | - Túlio D. Fernandes
- Department of Orthopedics, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo - São Paulo/SP, Brazil
| | - Ana Paula P. Velosa
- Department of Rheumatology, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo - São Paulo/SP, Brazil
| | - Vera Luiza Capelozzi
- Department of Pathology, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo - São Paulo/SP, Brazil.
| | - Natalino Hajime Yoshinari
- Department of Rheumatology, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo - São Paulo/SP, Brazil
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Callado MRM, Viana VST, Vendramini MBG, Leon EP, Bueno C, Velosa APP, Teodoro WR, Yoshinari NH. Autoantibody profile in the experimental model of scleroderma induced by type V human collagen. Immunology 2007; 122:38-46. [PMID: 17442023 PMCID: PMC2265984 DOI: 10.1111/j.1365-2567.2007.02610.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
UNLABELLED The aim of this study is to evaluate the humoral autoimmune response in the experimental model of systemic sclerosis (SSc) induced by human type V collagen (huCol V). New Zealand rabbits were immunized with huCol V in Freund's complete adjuvant (FCA) and boosted twice with 15 days intervals with huCol V in Freund's incomplete adjuvant. Control groups included animals injected only with FCA or bovine serum albumin. Bleeding was done at days 0, 30, 75 and 120. Tissue specimens were obtained for histopathological investigation. Serological analysis included detection of antibodies against huCol V and anti-topoisomerase I (Anti-Scl70) by enzyme-linked immunosorbent assay, antinuclear antibodies (ANA) by indirect immunofluorescence, and rheumatoid factor (RF) by a latex agglutination test. Target antigens were characterized by immunoblot. Histological analysis revealed extracellular matrix remodeling with fibrosis and vasculitis. Anti-Scl70 and ANA were detected as early as 30 days in all huCol V animals. The universal ANA staining pattern was Golgi-like. This serum reactivity was not abolished by previous absorption with huCol V. Characterization of the target antigen by immunoblot revealed two major protein fractions of 175,000 and 220,000 MW. Similarly to ANA, there was a gradual increase of reactivity throughout the immunization and also it was not abolished by preincubation of serum samples with huCol V. RF testing was negative in hyperimmune sera. CONCLUSION The production of autoantibodies, including anti-Scl70, a serological marker for SSc associated with histopathological alterations, validates huCol V induced-experimental model and brings out its potential for understanding the pathophysiology of SSc.
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Affiliation(s)
- Maria R M Callado
- Department of Rheumatology, Fortaleza General Hospital, Ceará, Brazil.
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Velosa APP, Teodoro WR, de Oliveira CC, Dos Santos Filho A, Moutinho RF, Santos AG, Vendramini MBG, Bueno C, Parra ER, Capelozzi VL, Yoshinari NH. Collagen V nasal tolerance in experimental model of systemic sclerosis. Arch Dermatol Res 2007; 299:177-89. [PMID: 17297604 DOI: 10.1007/s00403-007-0735-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2006] [Revised: 11/29/2006] [Accepted: 01/08/2007] [Indexed: 11/30/2022]
Abstract
Our aim was to study skin remodeling and autoantibody production in an experimental model of scleroderma (SSc), following nasal tolerance with human type V collagen (Col V). Female New Zealand rabbits (n = 12) were immunized with two doses of 1 mg/ml of Col V in complete Freund's adjuvant and additional two boosters in incomplete Freund's adjuvant to induce SSc. After 150 days, half of these immunized rabbits were submitted to type V collagen-induced tolerance receiving a daily nasal administration of 25 mug of Col V. Control animals (n = 6) were only submitted to type V collagen-induced tolerance. Serial skin biopsies were performed on days 0, 150 and 210, and stained with H&E, Masson's trichrome and Picrosirius for morphological and morphometric analysis. Types I, III and V collagen were identified by immunofluorescence. The animals' serum samples were collected to determine anti types I, III, IV and V collagen and antinuclear antibodies (ANA). Skin biopsies from immunized animals confirmed SSc morphology as previously described, such as progressive decrease of papillary dermis, appendages atrophy, increased type I, III and V collagen deposition. Rabbits with Col V-induced nasal tolerance showed reduction of skin involvement, with significant decrease of collagen amount. Humoral immune response did not change with nasal tolerance. Collagen V nasal tolerance promotes regression of skin remodeling process in an experimental model of SSc. We suggest that nasal tolerance with type V collagen can be a promising therapeutic option to treat scleroderma patients.
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Affiliation(s)
- Ana Paula Pereira Velosa
- Discipline of Reumatology, Faculty of Medicine, University of São Paulo, Av. Dr. Arnaldo 455; cep-01246-903, São Paulo, SP, Brazil
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Abstract
Decidualization in mice comprises a deep remodeling of extracellular matrix (ECM) components of the endometrium. In a previous biochemical study we showed that collagen types I and III are present in both pregnant and nonpregnant mouse endometrium, whereas collagen type V is expressed exclusively after the onset of decidualization. The distribution of collagen types in the pregnant mouse endometrium and possible changes of these molecular types in the different regions of the decidua is, however, not known. Using immunofluorescence and confocal microscopy we showed the presence of collagen types I, III, and V in the endometrial stroma of implantation and interimplantation sites from days 5 to 8 of pregnancy in the mouse. Collagen type III was chiefly expressed in the implantation sites and was the only collagen type to be present in the materno-fetal interface on the day of the embryo implantation. However, collagen type I was the predominant collagen in the interimplantation sites. Collagen type V was weakly expressed in the nondecidualized stroma during all periods but was expressed in larger amounts in the decidualized areas on day 7 of pregnancy, simultaneously with the accumulation of thick collagen fibrils in the same region. The highest immunofluorescence labeling for the three types of collagen was observed on day 7 when the antimesometrial decidual tissue achieved its greatest development. These data support previous studies that showed an intense ECM remodeling of the mouse endometrial stroma during the beginning of pregnancy. This outstanding remodeling may be important to stabilize placental anchorage.
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Affiliation(s)
- Karin Spiess
- Laboratory of Biology of Reproduction and Extracellular Matrix, Department of Cell and Development Biology, Institute of Biomedical Sciences, University of São Paulo, Brazil
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Parra ER, Teodoro WR, Velosa APP, de Oliveira CC, Yoshinari NH, Capelozzi VL. Interstitial and vascular type V collagen morphologic disorganization in usual interstitial pneumonia. J Histochem Cytochem 2006; 54:1315-25. [PMID: 16924125 PMCID: PMC3958120 DOI: 10.1369/jhc.6a6969.2006] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Recent evidence suggests that type V collagen plays a role in organizing collagen fibrils, thus maintaining fibril size and spatial organization uniform. In this study we sought to characterize the importance of type V collagen morphological disorganization and to study the relationship between type V collagen, active remodeling of the pulmonary vascular/parenchyma (fibroblastic foci), and other collagen types in usual interstitial pneumonia (UIP). We examined type V collagen and several other collagens in 24 open lung biopsies with histological pattern of UIP from patients with idiopathic pulmonary fibrosis (IPF). We used immunofluorescence, morphometry, and three-dimensional reconstruction to evaluate the amount of collagen V and its interaction with the active remodeling progression in UIP, as well as types I and III collagen fibers. Active remodeling progression was significantly related to type V collagen density (p<0.05), showing a gradual and direct increase to minimal, moderate, and severe fibrosis degree in UIP and in the three different areas: normal, intervening, and mural-organizing fibrosis in UIP. Parenchymal changes were characterized by morphological disorganization of fibrillar collagen with diverse disarray and thickness when observed by three-dimensional reconstruction. We concluded that in the different temporal stages of UIP, vascular/parenchyma collagen type V is increased, in disarray, and is the most important predictor of survival.
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Affiliation(s)
- Edwin Roger Parra
- Department of Pathology University of São Paulo Medical School, São Paulo, Brazil
| | - Walcy R. Teodoro
- Discipline of Rheumatology, University of São Paulo Medical School, São Paulo, Brazil
| | | | | | | | - Vera Luiza Capelozzi
- Department of Pathology University of São Paulo Medical School, São Paulo, Brazil
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Bezerra MC, Teodoro WR, de Oliveira CC, Velosa APP, Ogido LTI, Gauditano G, Parra ER, Capelozzi VL, Yoshinari NH. Scleroderma-like remodeling induced by type V collagen. Arch Dermatol Res 2006; 298:51-7. [PMID: 16710740 DOI: 10.1007/s00403-006-0645-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2005] [Revised: 11/24/2005] [Accepted: 01/22/2006] [Indexed: 10/24/2022]
Abstract
Recently, we discovered that New Zealand rabbits immunized with human type V collagen plus Freund's adjuvant present fibrosis and vasculitis of organs usually affected by systemic sclerosis. In this way, we studied the fibrillogenesis process to identify possible factors involved in altered remodeling observed in this scleroderma-like model. Additionally, we have done a very preliminary comparison with human skins obtained from scleroderma patients (n=3). Female New Zealand rabbits (n=10) were immunized subcutaneously with two doses of 1 mg collagen V (COL V) plus complete Freund's adjuvant for a 30-day interval, followed by two additional intramuscular booster immunizations in incomplete Freund's adjuvant for a 15-day interval. Animals from control group (n=10), were only inoculated with complete and incomplete Freund's adjuvant given at same conditions of COL V. Histological analysis of skins from animals and patients were done by Masson's trichrome staining, and immunofluorescence method to detect collagen fibers and interactions of types I, III and V collagen in the remodeling process. The analysis of animal skins showed collagen fibril deposits in the dermis after 7 days of sensibilization and an increase in these deposits after 75 and 120 days, respectively. Skin thickness and atrophy of sebaceous and sweat glands were progressively more intense in late sacrificed animals and correlated with increased amount of collagen deposition. Surprisingly, type V collagen was overexpressed both in animals and patients, forming dense and atypical collagen fibers in the dermis. We suggest that this anomalous expression of morphologically different type V collagen could justify the remodeling observed in scleroderma plaque.
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