1
|
Nascimento-Carvalho B, da Silva BD, da Silva MB, Dos-Santos A, Ribeiro TF, da Silva Dias D, de Souza LE, Dutra MRH, Catanozi S, Caldini EG, De Angelis K, Scapini KB, Sanches IC, Irigoyen MC. Aerobic exercise attenuates dysautonomia, cardiac diastolic dysfunctions, and hemodynamic overload in female mice with atherosclerosis. Sci Rep 2024; 14:7835. [PMID: 38570516 PMCID: PMC10991254 DOI: 10.1038/s41598-024-52883-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Accepted: 01/23/2024] [Indexed: 04/05/2024] Open
Abstract
Cardiovascular risk increases during the aging process in women with atherosclerosis and exercise training is a strategy for management of cardiac risks in at-risk populations. Therefore, the aims of this study were to evaluate: (1) the influence of the aging process on cardiac function, hemodynamics, cardiovascular autonomic modulation, and baroreflex sensitivity in females with atherosclerosis at the onset of reproductive senescence; and (2) the impact of exercise training on age-related dysfunctions in this model. Eighteen Apolipoprotein-E knockout female mice were divided equally into young (Y), middle-aged (MA), and trained middle-aged (MAT). Echocardiographic exams were performed to verify cardiac morphology and function. Cannulation for direct recording of blood pressure and heart rate, and analysis of cardiovascular autonomic modulation, baroreflex sensitivity were performed. The MA had lower cardiac diastolic function (E'/A' ratio), and higher aortic thickness, heart rate and mean arterial pressure, lower heart rate variability and baroreflex sensitivity compared with Y. There were no differences between Y and MAT in these parameters. Positive correlation coefficients were found between aortic wall thickness with hemodynamics data. The aging process causes a series of deleterious effects such as hemodynamic overload and dysautonomia in female with atherosclerosis. Exercise training was effective in mitigating aged-related dysfunctions.
Collapse
Affiliation(s)
- Bruno Nascimento-Carvalho
- Unidade de Hipertensao, Instituto do Coracao, Hospital das Clinicas, Faculdade de Medicina, Universidade de Sao Paulo (InCor-HCFMUSP), São Paulo, SP, Brazil
| | - Bruno Durante da Silva
- Unidade de Hipertensao, Instituto do Coracao, Hospital das Clinicas, Faculdade de Medicina, Universidade de Sao Paulo (InCor-HCFMUSP), São Paulo, SP, Brazil
| | - Maikon Barbosa da Silva
- Unidade de Hipertensao, Instituto do Coracao, Hospital das Clinicas, Faculdade de Medicina, Universidade de Sao Paulo (InCor-HCFMUSP), São Paulo, SP, Brazil
| | - Adriano Dos-Santos
- Human Movement Lab, São Judas Tadeu University (USJT), São Paulo, SP, Brazil
| | | | - Danielle da Silva Dias
- Unidade de Hipertensao, Instituto do Coracao, Hospital das Clinicas, Faculdade de Medicina, Universidade de Sao Paulo (InCor-HCFMUSP), São Paulo, SP, Brazil
- Postgraduate Program in Physical Education, Universidade Federal Do Maranhão, São Luís, MA, Brazil
| | - Leandro Eziquiel de Souza
- Unidade de Hipertensao, Instituto do Coracao, Hospital das Clinicas, Faculdade de Medicina, Universidade de Sao Paulo (InCor-HCFMUSP), São Paulo, SP, Brazil
| | - Marina Rascio Henriques Dutra
- Laboratório de Fisiologia Translacional, Universidade Nove de Julho (Uninove), São Paulo, SP, Brazil
- Physiology Exercise Laboratory, Department of Physiology, Federal University of São Paulo (Unifesp), São Paulo, SP, Brazil
| | - Sergio Catanozi
- Laboratorio de Lipides (LIM-10), Hospital das Clinicas (HCFMUSP), Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil
| | - Elia G Caldini
- Departamento de Patologia, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Kátia De Angelis
- Laboratório de Fisiologia Translacional, Universidade Nove de Julho (Uninove), São Paulo, SP, Brazil
- Physiology Exercise Laboratory, Department of Physiology, Federal University of São Paulo (Unifesp), São Paulo, SP, Brazil
| | | | | | - Maria Claudia Irigoyen
- Unidade de Hipertensao, Instituto do Coracao, Hospital das Clinicas, Faculdade de Medicina, Universidade de Sao Paulo (InCor-HCFMUSP), São Paulo, SP, Brazil.
| |
Collapse
|
2
|
Hallak J, Caldini EG, Teixeira TA, Correa MCM, Duarte-Neto AN, Zambrano F, Taubert A, Hermosilla C, Drevet JR, Dolhnikoff M, Sanchez R, Saldiva PHN. Transmission electron microscopy reveals the presence of SARS-CoV-2 in human spermatozoa associated with an ETosis-like response. Andrology 2024. [PMID: 38469742 DOI: 10.1111/andr.13612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 01/05/2024] [Accepted: 01/23/2024] [Indexed: 03/13/2024]
Abstract
BACKGROUND Severe acute syndrome coronavirus 2 can invade a variety of tissues, including the testis. Even though this virus is scarcely found in human semen polymerase chain reaction tests, autopsy studies confirm the viral presence in all testicular cell types, including spermatozoa and spermatids. OBJECTIVE To investigate whether the severe acute syndrome coronavirus 2 is present inside the spermatozoa of negative polymerase chain reaction-infected men up to 3 months after hospital discharge. MATERIALS AND METHODS This cross-sectional study included 13 confirmed moderate-to-severe COVID-19 patients enrolled 30-90 days after the diagnosis. Semen samples were obtained and examined with real-time polymerase chain reaction for RNA detection and by transmission electron microscopy. RESULTS In moderate-to-severe clinical scenarios, we identified the severe acute syndrome coronavirus 2 inside spermatozoa in nine of 13 patients up to 90 days after discharge from the hospital. Moreover, some DNA-based extracellular traps were reported in all studied specimens. DISCUSSION AND CONCLUSION Although severe acute syndrome coronavirus 2 was not present in the infected men's semen, it was intracellularly present in the spermatozoa till 3 months after hospital discharge. The Electron microscopy (EM) findings also suggest that spermatozoa produce nuclear DNA-based extracellular traps, probably in a cell-free DNA-dependent manner, similar to those previously described in the systemic inflammatory response to COVID-19. In moderate-to-severe cases, the blood-testes barrier grants little defence against different pathogenic viruses, including the severe acute syndrome coronavirus 2. The virus could also use the epididymis as a post-testicular route to bind and fuse to the mature spermatozoon and possibly accomplish the reverse transcription of the single-stranded viral RNA into proviral DNA. These mechanisms can elicit extracellular cell-free DNA formation. The potential implications of our findings for assisted conception must be addressed, and the evolutionary history of DNA-based extracellular traps as preserved ammunition in animals' innate defence might improve our understanding of the severe acute syndrome coronavirus 2 pathophysiology in the testis and spermatozoa.
Collapse
Affiliation(s)
- Jorge Hallak
- Departamento de Cirurgia, Disciplina de Urologia, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
- Androscience, Science & Innovation Center in Andrology and High-Complex Clinical and Research Andrology Laboratory., Androscience Institute, Sao Paulo, Brasil
| | - Elia G Caldini
- Departamento de Patologia, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Thiago A Teixeira
- Androscience, Science & Innovation Center in Andrology and High-Complex Clinical and Research Andrology Laboratory., Androscience Institute, Sao Paulo, Brasil
- Departamento de Cirurgia, Divisão de Urologia, Hospital Universitário da Universidade Federal do Amapá, Amapá, Brazil
| | | | - Amaro N Duarte-Neto
- Departamento de Patologia, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Fabiola Zambrano
- Department of Preclinical Sciences, Faculty of Medicine, Universidad de La Frontera, Temuco, Chile
- Center of Translational Medicine-Scientific and Technological Bioresource Nucleus (CEMT-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile
| | - Anja Taubert
- Institute of Parasitology, Justus Liebig University Giessen, Giessen, Germany
| | - Carlos Hermosilla
- Institute of Parasitology, Justus Liebig University Giessen, Giessen, Germany
| | - Joël R Drevet
- GReD Institute, CNRS-INSERM-Université Clermont Auvergne, Faculty of Medicine, Clermont-Ferrand, France
| | - Marisa Dolhnikoff
- Departamento de Patologia, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Raul Sanchez
- Center of Translational Medicine-Scientific and Technological Bioresource Nucleus (CEMT-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile
- Institute of Parasitology, Justus Liebig University Giessen, Giessen, Germany
| | - Paulo H N Saldiva
- Departamento de Patologia, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| |
Collapse
|
3
|
Ghirotto B, Oliveira DF, Cipelli M, Basso PJ, de Lima J, Breda CNS, Ribeiro HC, Silva CCC, Sertié AL, Oliveira AER, Hiyane MI, Caldini EG, Sussulini A, Nakaya HI, Kowaltowski AJ, Oliveira EML, Zatz M, Câmara NOS. MS-driven metabolic alterations are recapitulated in iPSC-derived astrocytes. Ann Neurol 2022; 91:652-669. [PMID: 35226368 PMCID: PMC9310856 DOI: 10.1002/ana.26336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 02/17/2022] [Accepted: 02/18/2022] [Indexed: 11/20/2022]
Abstract
Objective Astrocytes play a significant role in the pathology of multiple sclerosis (MS). Nevertheless, for ethical reasons, most studies in these cells were performed using the Experimental Autoimmune Encephalomyelitis model. As there are significant differences between human and mouse cells, we aimed here to better characterize astrocytes from patients with MS (PwMS), focusing mainly on mitochondrial function and cell metabolism. Methods We obtained and characterized induced pluripotent stem cell (iPSC)‐derived astrocytes from three PwMS and three unaffected controls, and performed electron microscopy, flow cytometry, cytokine and glutamate measurements, gene expression, in situ respiration, and metabolomics. We validated our findings using a single‐nuclei RNA sequencing dataset. Results We detected several differences in MS astrocytes including: (i) enrichment of genes associated with neurodegeneration, (ii) increased mitochondrial fission, (iii) increased production of superoxide and MS‐related proinflammatory chemokines, (iv) impaired uptake and enhanced release of glutamate, (v) increased electron transport capacity and proton leak, in line with the increased oxidative stress, and (vi) a distinct metabolic profile, with a deficiency in amino acid catabolism and increased sphingolipid metabolism, which have already been linked to MS. Interpretation Here we describe the metabolic profile of iPSC‐derived astrocytes from PwMS and validate this model as a very powerful tool to study disease mechanisms and to perform non‐invasive drug targeting assays in vitro. Our findings recapitulate several disease features described in patients and provide new mechanistic insights into the metabolic rewiring of astrocytes in MS, which could be targeted in future therapeutic studies. ANN NEUROL 2022;91:652–669
Collapse
Affiliation(s)
- Bruno Ghirotto
- Transplantation Immunobiology Laboratory, Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, 05508-900, Brazil
| | - Danyllo F Oliveira
- Human Genome and Stem Cell Research Center, Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, SP, 05508-090, Brazil
| | - Marcella Cipelli
- Transplantation Immunobiology Laboratory, Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, 05508-900, Brazil
| | - Paulo J Basso
- Transplantation Immunobiology Laboratory, Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, 05508-900, Brazil
| | - Jean de Lima
- Transplantation Immunobiology Laboratory, Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, 05508-900, Brazil
| | - Cristiane N S Breda
- Transplantation Immunobiology Laboratory, Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, 05508-900, Brazil
| | - Henrique C Ribeiro
- Laboratory of Bioanalytics and Integrated Omics, Department of Analytical Chemistry, Institute of Chemistry, State University of Campinas, Campinas, SP, 13083-970, Brazil
| | - Camille C C Silva
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, SP, 05508-000, Brazil
| | - Andrea L Sertié
- Hospital Israelita Albert Einstein, São Paulo, SP, 05652-900, Brazil
| | - Antonio Edson R Oliveira
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of São Paulo, SP, 05508-000, Brazil
| | - Meire I Hiyane
- Transplantation Immunobiology Laboratory, Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, 05508-900, Brazil
| | - Elia G Caldini
- Cell Biology Laboratory, Department of Pathology, School of Medicine, University of São Paulo, São Paulo, SP, 01246903, Brazil
| | - Alessandra Sussulini
- Laboratory of Bioanalytics and Integrated Omics, Department of Analytical Chemistry, Institute of Chemistry, State University of Campinas, Campinas, SP, 13083-970, Brazil
| | - Helder I Nakaya
- Hospital Israelita Albert Einstein, São Paulo, SP, 05652-900, Brazil.,Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of São Paulo, SP, 05508-000, Brazil
| | - Alicia J Kowaltowski
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, SP, 05508-000, Brazil
| | - Enedina M L Oliveira
- Neuroimmunology Clinic, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, 04039-002, Brazil
| | - Mayana Zatz
- Human Genome and Stem Cell Research Center, Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, SP, 05508-090, Brazil
| | - Niels O S Câmara
- Transplantation Immunobiology Laboratory, Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, 05508-900, Brazil
| |
Collapse
|
4
|
Duarte-Neto AN, Teixeira TA, Caldini EG, Kanamura CT, Gomes-Gouvêa MS, Dos Santos ABG, Monteiro RAA, Pinho JRR, Mauad T, da Silva LFF, Saldiva PHN, Dolhnikoff M, Leite KRM, Hallak J. Testicular pathology in fatal COVID-19: A descriptive autopsy study. Andrology 2021; 10:13-23. [PMID: 34196475 PMCID: PMC8444746 DOI: 10.1111/andr.13073] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 06/25/2021] [Accepted: 06/28/2021] [Indexed: 01/08/2023]
Abstract
BACKGROUND Multi-organ damage is a common feature of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, going beyond the initially observed severe pneumonia. Evidence that the testis is also compromised is growing. OBJECTIVE To describe the pathological findings in testes from fatal cases of COVID-19, including the detection of viral particles and antigens, and inflammatory cell subsets. MATERIALS AND METHODS Postmortem testicular samples were obtained by percutaneous puncture from 11 deceased men and examined by reverse-transcription polymerase chain reaction (RT-PCR) for RNA detection and by light and electron microscopy (EM) for SARS-CoV-2. Immunohistochemistry (IHC) for the SARS-CoV-2 N-protein and lymphocytic and histiocytic markers was also performed. RESULTS Eight patients had mild interstitial orchitis, composed mainly of CD68+ and TCD8+ cells. Fibrin thrombi were detected in five cases. All cases presented congestion, interstitial edema, thickening of the tubular basal membrane, decreased Leydig and Sertoli cells with reduced spermatogenesis, and strong expression of vascular cell adhesion molecule (VCAM) in vessels. IHC detected SARS-Cov-2 antigen in Leydig cells, Sertoli cells, spermatogonia, and fibroblasts in all cases. EM detected viral particles in the cytoplasm of fibroblasts, endothelium, Sertoli and Leydig cells, spermatids, and epithelial cells of the rete testis in four cases, while RT-PCR detected SARS-CoV-2 RNA in three cases. DISCUSSION AND CONCLUSION The COVID-19-associated testicular lesion revealed a combination of orchitis, vascular changes, basal membrane thickening, Leydig and Sertoli cell scarcity, and reduced spermatogenesis associated with SARS-CoV-2 local infection that may impair hormonal function and fertility in men.
Collapse
Affiliation(s)
- Amaro N Duarte-Neto
- Departamento de Patologia, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil.,Instituto Adolfo Lutz, São Paulo, Brazil
| | - Thiago A Teixeira
- Departamento de Cirurgia, Disciplina de Urologia, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Elia G Caldini
- Departamento de Patologia, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | | | - Michele S Gomes-Gouvêa
- Departamento de Gastroenterologia (LIM-07), Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Angela B G Dos Santos
- Departamento de Patologia, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Renata A A Monteiro
- Departamento de Patologia, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - João R R Pinho
- Departamento de Gastroenterologia (LIM-07), Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Thais Mauad
- Departamento de Patologia, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Luiz F F da Silva
- Departamento de Patologia, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil.,Serviço de Verificação de Óbitos da Capital, Universidade de São Paulo, São Paulo, Brazil
| | - Paulo H N Saldiva
- Departamento de Patologia, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Marisa Dolhnikoff
- Departamento de Patologia, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Katia R M Leite
- Departamento de Cirurgia, Disciplina de Urologia, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Jorge Hallak
- Departamento de Patologia, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil.,Departamento de Cirurgia, Disciplina de Urologia, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| |
Collapse
|
5
|
Dolhnikoff M, Duarte-Neto AN, Saldiva PHN, Caldini EG. Using EM data to understand COVID-19 pathophysiology. Lancet 2021; 397:196-197. [PMID: 33453779 PMCID: PMC7833540 DOI: 10.1016/s0140-6736(21)00034-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 12/09/2020] [Indexed: 11/25/2022]
Affiliation(s)
- Marisa Dolhnikoff
- Departamento de Patalogia, Faculdade de Medicina da Universidade de São Paulo, São Paulo 01246-903, Brazil.
| | - Amaro N Duarte-Neto
- Departamento de Patalogia, Faculdade de Medicina da Universidade de São Paulo, São Paulo 01246-903, Brazil
| | - Paulo H N Saldiva
- Departamento de Patalogia, Faculdade de Medicina da Universidade de São Paulo, São Paulo 01246-903, Brazil
| | - Elia G Caldini
- Departamento de Patalogia, Faculdade de Medicina da Universidade de São Paulo, São Paulo 01246-903, Brazil
| |
Collapse
|
6
|
Moraes-Silva IC, De Angelis K, Damaceno-Rodrigues NR, Caldini EG, Irigoyen MC. Exercise Training Improves High Blood Pressure Variability-induced Cardiac Damage In Normotensive Rats. Med Sci Sports Exerc 2020. [DOI: 10.1249/01.mss.0000680324.43323.6b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
7
|
Almeida-Oliveira AR, Aquino-Junior J, Abbasi A, Santos-Dias A, Oliveira-Junior MC, Alberca-Custodio RW, Rigonato-Oliveira NC, Salles-Dias LP, Damaceno-Rodrigues NR, Caldini EG, Arantes-Costa FM, Ligeiro-Oliveira AP, Belvisi MG, Vieira RP. Effects of aerobic exercise on molecular aspects of asthma: involvement of SOCS-JAK-STAT. Exerc Immunol Rev 2019; 25:50-62. [PMID: 30785869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
BACKGROUND Aerobic training (AT) decreases airway inflammation in asthma, but the underlying cellular and molecular mechanisms are not completely understood. Thus, this study evaluated the participation of SOCS-JAK-STAT signaling in the effects of AT on airway inflammation, remodeling and hyperresponsiveness in a model of allergic airway inflammation. METHODS C57Bl/6 mice were divided into Control (Co), Exercise (Ex), HDM (HDM), and HDM+Exercise (HDM+ Ex). Dermatophagoides pteronyssinus (100ug/mouse) were administered oro-tracheally on days 0, 7, 14, 21, 28, 35, 42 and 49. AT was performed in a treadmill during 4 weeks in moderate intensity, from day 24 until day 52. RESULTS AT inhibited HDM-induced total cells (p<0.001), eosinophils (p<0.01), neutrophils (p<0.01) and lymphocytes (p<0.01) in BAL, and eosinophils (p<0.01), neutrophils (p<0.01) and lymphocytes (p<0.01) in peribronchial space. AT also reduced BAL levels of IL-4 (p<0.001), IL-5 (p<0.001), IL-13 (p<0.001), CXCL1 (p<0.01), IL-17 (p<0.01), IL-23 (p<0.05), IL-33 (p<0.05), while increased IL- 10 (p<0.05). Airway collagen fibers (p<0.01), elastic fibers p<0.01) and mucin (p<0.01) were also reduced by AT. AT also inhibited HDM-induced airway hyperresponsiveness (AHR) to methacholine 6,25mg/ml (p<0.01), 12,5mg/mL (p<0.01), 25mg/mL (p<0.01) and 50mg/mL (p<0.01). Mechanistically, AT reduced the expression of STAT6 (p<0.05), STAT3 (p<0.001), STAT5 (p<0.01) and JAK2 (p<0.001), similarly by peribronchial leukocytes and by airway epithelial cells. SOCS1 expression (p<0.001) was upregulated in leukocytes and in epithelial cells, SOCS2 (p<0.01) was upregulated in leukocytes and SOCS3 down-regulated in leukocytes (p<0.05) and in epithelial cells (p<0.001). CONCLUSIONS AT reduces asthma phenotype involving SOCSJAK- STAT signaling.
Collapse
Affiliation(s)
- A R Almeida-Oliveira
- Nove de Julho University, Rua Vergueiro 235/249, Liberdade, São Paulo - SP, Brazil, 01504-001. Brazilian Institute of Teaching and Research in Pulmonary and Exercise Immunology (IBEPIPE). Rua Pedro Ernesto 240, São José dos Campos - SP, Brazil, 12245-520
| | - Jcj Aquino-Junior
- Nove de Julho University, Rua Vergueiro 235/249, Liberdade, São Paulo - SP, Brazil, 01504-001. Brazilian Institute of Teaching and Research in Pulmonary and Exercise Immunology (IBEPIPE). Rua Pedro Ernesto 240, São José dos Campos - SP, Brazil, 12245-520
| | - A Abbasi
- Division of Respiratory & Critical Care Physiology & Medicine, Department of Medicine, Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, CA 90502, USA
| | - A Santos-Dias
- Brazilian Institute of Teaching and Research in Pulmonary and Exercise Immunology (IBEPIPE). Rua Pedro Ernesto 240, São José dos Campos - SP, Brazil, 12245-520
| | - M C Oliveira-Junior
- Brazilian Institute of Teaching and Research in Pulmonary and Exercise Immunology (IBEPIPE). Rua Pedro Ernesto 240, São José dos Campos - SP, Brazil, 12245-520
| | - R W Alberca-Custodio
- Brazilian Institute of Teaching and Research in Pulmonary and Exercise Immunology (IBEPIPE). Rua Pedro Ernesto 240, São José dos Campos - SP, Brazil, 12245-520
| | - N C Rigonato-Oliveira
- Nove de Julho University, Rua Vergueiro 235/249, Liberdade, São Paulo - SP, Brazil, 01504-001
| | - L P Salles-Dias
- Universidade Brasil, Post-graduation Program in Bioengineering and in Biomedical Engineering, Campus Itaquera, Rua Carolina Fonseca 235, São Paulo - SP, Brazil, 08230-030
| | - N R Damaceno-Rodrigues
- University of Sao Paulo, School of Medicine, Department of Pathology, Laboratory of Cell Biology (LIM 59), Avenida Doutor Arnaldo 455, Cerqueira Cesar, São Paulo - SP, Brazil, 01246-903
| | - E G Caldini
- University of Sao Paulo, School of Medicine, Department of Pathology, Laboratory of Cell Biology (LIM 59), Avenida Doutor Arnaldo 455, Cerqueira Cesar, São Paulo - SP, Brazil, 01246-903
| | - F M Arantes-Costa
- University of Sao Paulo, School of Medicine, Department of Clinical Medicine, Laboratory of Experimental Therapeutics (LIM 20), Avenida Doutor Arnaldo 455, Cerqueira Cesar, São Paulo - SP, Brazil, 01246-903
| | - A P Ligeiro-Oliveira
- Nove de Julho University, Rua Vergueiro 235/249, Liberdade, São Paulo - SP, Brazil, 01504-001
| | - M G Belvisi
- Respiratory Pharmacology Group, Airway Disease, National Heart and Lung Institute, Imperial College London, London, UK
| | - R P Vieira
- Universidade Brasil, Post-graduation Program in Bioengineering and in Biomedical Engineering, Campus Itaquera, Rua Carolina Fonseca 235, São Paulo - SP, Brazil, 08230-030. Brazilian Institute of Teaching and Research in Pulmonary and Exercise Immunology (IBEPIPE). Rua Pedro Ernesto 240, São José dos Campos - SP, Brazil, 12245-520. Post-Graduation Program in Sciences of Human Movement and Rehabilitation, Federal University of Sao Paulo (UNIFESP), Campus Baixada Santista, Av. Ana Costa, 95 - Vila Mathias - Santos/SP - CEP: 11060-001
| |
Collapse
|
8
|
Ono SK, Bassit L, Van Vaisberg V, Alves VAF, Caldini EG, Herman BD, Shabman R, Fedorova NB, Paranaguá-Vezozzo D, Sampaio CT, Lages RB, Terrabuio D, Andraus W, Schinazi RF, Carrilho FJ. Acute acalculous cholecystitis during zika virus infection in an immunocompromised patient. Hepatology 2018; 67:2051-2054. [PMID: 29171859 PMCID: PMC5906153 DOI: 10.1002/hep.29682] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 09/14/2017] [Accepted: 11/21/2017] [Indexed: 01/11/2023]
Affiliation(s)
- Suzane Kioko Ono
- Department of Gastroenterology, Division of Clinical Gastroenterology and Hepatology, Hospital das Clinicas - University of São Paulo School of Medicine, São Paulo, SP, Brazil
| | - Leda Bassit
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Victor Van Vaisberg
- Department of Gastroenterology, Division of Clinical Gastroenterology and Hepatology, Hospital das Clinicas - University of São Paulo School of Medicine, São Paulo, SP, Brazil
| | | | - Elia G. Caldini
- Department of Pathology, University of São Paulo School of Medicine, São Paulo, Brazil
| | - Brian D. Herman
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Reed Shabman
- J. Craig Venter Institute, Rockville, MD 20850, USA
| | | | - Denise Paranaguá-Vezozzo
- Department of Gastroenterology, Division of Clinical Gastroenterology and Hepatology, Hospital das Clinicas - University of São Paulo School of Medicine, São Paulo, SP, Brazil
| | - Caroline Torres Sampaio
- Department of Gastroenterology, Division of Clinical Gastroenterology and Hepatology, Hospital das Clinicas - University of São Paulo School of Medicine, São Paulo, SP, Brazil
| | - Rafael Bandeira Lages
- Department of Gastroenterology, Division of Clinical Gastroenterology and Hepatology, Hospital das Clinicas - University of São Paulo School of Medicine, São Paulo, SP, Brazil
| | - Débora Terrabuio
- Department of Gastroenterology, Division of Clinical Gastroenterology and Hepatology, Hospital das Clinicas - University of São Paulo School of Medicine, São Paulo, SP, Brazil
| | - Wellington Andraus
- Department of Gastroenterology, Division of Clinical Gastroenterology and Hepatology, Hospital das Clinicas - University of São Paulo School of Medicine, São Paulo, SP, Brazil
| | - Raymond F. Schinazi
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Flair José Carrilho
- Department of Gastroenterology, Division of Clinical Gastroenterology and Hepatology, Hospital das Clinicas - University of São Paulo School of Medicine, São Paulo, SP, Brazil
| |
Collapse
|
9
|
Favero GM, Paz JL, Otake AH, Maria DA, Caldini EG, de Medeiros RSS, Deus DF, Chammas R, Maranhão RC, Bydlowski SP. Cell internalization of 7-ketocholesterol-containing nanoemulsion through LDL receptor reduces melanoma growth in vitro and in vivo: a preliminary report. Oncotarget 2018; 9:14160-14174. [PMID: 29581835 PMCID: PMC5865661 DOI: 10.18632/oncotarget.24389] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2017] [Accepted: 01/25/2018] [Indexed: 01/01/2023] Open
Abstract
Oxysterols are cholesterol oxygenated derivatives which possess several biological actions. Among oxysterols, 7-ketocholesterol (7KC) is known to induce cell death. Here, we hypothesized that 7KC cytotoxicity could be applied in cancer therapeutics. 7KC was incorporated into a lipid core nanoemulsion. As a cellular model the murine melanoma cell line B16F10 was used. The nanoparticle (7KCLDE) uptake into tumor cells was displaced by increasing amounts of low-density-lipoproteins (LDL) suggesting a LDL-receptor-mediated cell internalization. 7KCLDE was mainly cytostatic, which led to an accumulation of polyploid cells. Nevertheless, a single dose of 7KCLDE killed roughly 10% of melanoma cells. In addition, it was observed dissipation of the transmembrane potential, evidenced with flow cytometry; presence of autophagic vacuoles, visualized and quantified with flow cytometry and acridine orange; and presence of myelin figures, observed with ultrastructural microscopy. 7KCLDE impaired cytokenesis was accompanied by changes in cellular morphology into a fibroblastoid shape which is supported by cytoskeletal rearrangements, as shown by the increased actin polymerization. 7KCLDE was injected into B16 melanoma tumor-bearing mice. 7KCLDE accumulated in the liver and tumor. In melanoma tumor 7KCLDE promoted a >50% size reduction, enlarged the necrotic area, and reduced intratumoral vasculature. 7KCLDE increased the survival rates of animals, without hematologic or liver toxicity. Although more pre-clinical studies should be performed, our preliminary results suggested that 7KCLDE is a promising novel preparation for cancer chemotherapy.
Collapse
Affiliation(s)
- Giovani M Favero
- Laboratory of Genetics and Molecular Hematology (LIM31), Department of Hematology, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil.,Department of General Biology, Universidade Estadual de Ponta Grossa, Ponta Grossa, PR, Brazil
| | - Jessica L Paz
- Laboratory of Genetics and Molecular Hematology (LIM31), Department of Hematology, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Andréia H Otake
- Centro de Investigação Translacional em Oncologia (LIM24), Departamento de Radiologia e Oncologia, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil.,Instituto do Cancer do Estado de Sao Paulo (ICESP), SP, Brazil
| | - Durvanei A Maria
- Biochemistry and Biophysics Laboratories, Instituto Butantan, Sao Paulo, SP, Brazil
| | - Elia G Caldini
- Laboratory for Cell Biology, Department of Pathology, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Raphael S S de Medeiros
- Centro de Investigação Translacional em Oncologia (LIM24), Departamento de Radiologia e Oncologia, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil.,Instituto do Cancer do Estado de Sao Paulo (ICESP), SP, Brazil
| | - Debora F Deus
- Laboratory of Metabolism and Lipids, Heart Institute (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Roger Chammas
- Centro de Investigação Translacional em Oncologia (LIM24), Departamento de Radiologia e Oncologia, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil.,Instituto do Cancer do Estado de Sao Paulo (ICESP), SP, Brazil
| | - Raul C Maranhão
- Laboratory of Metabolism and Lipids, Heart Institute (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil.,Faculdade de Ciencias Farmaceuticas, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Sergio P Bydlowski
- Laboratory of Genetics and Molecular Hematology (LIM31), Department of Hematology, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| |
Collapse
|
10
|
Aitken EH, Negri EM, Barboza R, Lima MRI, Álvarez JM, Marinho CRF, Caldini EG, Epiphanio S. Ultrastructure of the lung in a murine model of malaria-associated acute lung injury/acute respiratory distress syndrome. Malar J 2014; 13:230. [PMID: 24927627 PMCID: PMC4062769 DOI: 10.1186/1475-2875-13-230] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Accepted: 06/07/2014] [Indexed: 02/06/2023] Open
Abstract
Background The mechanisms through which infection with Plasmodium spp. result in lung disease are largely unknown. Recently a number of mouse models have been developed to research malaria-associated lung injury but no detailed ultrastructure studies of the disease in its terminal stages in a murine model have yet been published. The goal was to perform an ultrastructural analysis of the lungs of mice that died with malaria-associated acute lung injury/acute respiratory distress syndrome to better determine the relevancy of the murine models and investigate the mechanism of disease. Methods DBA/2 mice were infected with Plasmodium berghei strain ANKA. Mice had their lungs removed immediately after death, processed using standard methods and viewed by transmission electron microscopy (TEM). Results Infected red blood cell:endothelium contact, swollen endothelium with distended cytoplasmic extensions and thickening of endothelium basement membrane were observed. Septa were thick and filled with congested capillaries and leukocytes and the alveolar spaces contained blood cells, oedema and cell debris. Conclusion Results show that the lung ultrastructure of P. berghei ANKA-infected mice has similar features to what has been described in post-mortem TEM studies of lungs from individuals infected with Plasmodium falciparum. These data support the use of murine models to study malaria-associated acute lung injury.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | - Sabrina Epiphanio
- Department of Immunology, University of São Paulo, São Paulo, Brazil.
| |
Collapse
|
11
|
Stoker C, Zayas MA, Ferreira MA, Durando M, Galoppo GH, Rodríguez HA, Repetti MR, Beldoménico HR, Caldini EG, Luque EH, Muñoz-de-Toro M. The eggshell features and clutch viability of the broad-snouted caiman (Caiman latirostris) are associated with the egg burden of organochlorine compounds. Ecotoxicol Environ Saf 2013; 98:191-195. [PMID: 24054891 DOI: 10.1016/j.ecoenv.2013.08.022] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Revised: 08/26/2013] [Accepted: 08/28/2013] [Indexed: 06/02/2023]
Abstract
Organochlorine compounds (OCCs) are toxic and have been identified as endocrine-disrupting chemicals (EDCs). The broad-snouted Caiman (Caiman latirostris) is an oviparous species widely distributed in South America with potential to accumulate OCCs. The eggshell is formed during passage of the eggs through the oviduct. Since the oviduct is a target of hormone actions, exposure to OCCs could modify eggshell quality, thus affecting clutch viability. Eight clutches were collected from wetlands of Parana River tributaries, in north-eastern Argentina. Two to four eggs per clutch were used to establish the burden of OCCs, eggshell thickness and eggshell porosity. The remaining eggs were incubated in controlled conditions. Ten days after hatching, hatchling survival was assessed. Organochlorine pesticide residues (OCPs) were found in all clutches, while polychlorinated biphenyls (PCBs) were present in all but one clutch. The principal contributors to the OCP burden were members of the DDT family and oxychlordane. Eggshell thickness was 400.9±6.0 μm and, unexpectedly, no association between eggshell thickness and the OCC burden was found. The number of pores in the outer surface was 25.3±4.3 pores/cm². A significant inverse correlation between porosity and OCC burden was found (Pearson r= -0.81, p= 0.01). Furthermore, a decrease in caiman survival with decreased pore density was observed (Pearson r= 0.73, p= 0.04). Our findings highlight another potential negative impact of current and past use of OCCs on wildlife species.
Collapse
Affiliation(s)
- C Stoker
- Laboratory of Endocrinology and Endocrine-dependent Tumors, School of Biochemistry and Biological Sciences, National University of Litoral, Santa Fe, Argentina
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Flues K, Moraes-Silva IC, Mostarda C, Souza PRM, Diniz GP, Moreira ED, Piratello AC, Chaves MLB, De Angelis K, Salemi VMC, Irigoyen MC, Caldini EG. Cardiac and pulmonary arterial remodeling after sinoaortic denervation in normotensive rats. Auton Neurosci 2011; 166:47-53. [PMID: 22079748 DOI: 10.1016/j.autneu.2011.10.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2011] [Revised: 10/09/2011] [Accepted: 10/12/2011] [Indexed: 10/15/2022]
Abstract
Blood pressure variability (BPV) and baroreflex dysfunction may contribute to end-organ damage process. We investigated the effects of baroreceptor deficit (10 weeks after sinoaortic denervation - SAD) on hemodynamic alterations, cardiac and pulmonary remodeling. Cardiac function and morphology of male Wistar intact rats (C) and SAD rats (SAD) (n=8/group) were assessed by echocardiography and collagen quantification. BP was directly recorded. Ventricular hypertrophy was quantified by the ratio of left ventricular weight (LVW) and right ventricular weight (RVW) to body weight (BW). BPV was quantified in the time and frequency domains. The atrial natriuretic peptide (ANP), alpha-skeletal actin (α-skelectal), collagen type I and type III genes mRNA expression were evaluated by RT-PCR. SAD did not change BP, but increased BPV (11±0.49 vs. 5±0.3 mmHg). As expected, baroreflex was reduced in SAD. Pulmonary artery acceleration time was reduced in SAD. In addition, SAD impaired diastolic function in both LV (6.8±0.26 vs. 5.02±0.21 mmHg) and RV (5.1±0.21 vs. 4.2±0.12 mmHg). SAD increased LVW/BW in 9% and RVW/BW in 20%, and augmented total collagen (3.8-fold in LV, 2.7-fold in RV, and 3.35-fold in pulmonary artery). Also, SAD increased type I (~6-fold) and III (~5-fold) collagen gene expression. Denervation increased ANP expression in LV (75%), in RV (74%) and increased α-skelectal expression in LV (300%) and in RV (546%). Baroreflex function impairment by SAD, despite not changing BP, induced important adjustments in cardiac structure and pulmonary hypertension. These changes may indicate that isolated baroreflex dysfunction can modulate target tissue damage.
Collapse
Affiliation(s)
- K Flues
- Experimental Hypertension Laboratory, Hypertension Unit, Heart Institute, Department of Pathology, University of Sao Paulo Medical School, São Paulo, SP, Brazil
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Leite MS, Damaceno-Rodrigues NR, Simone MRPT, Santos ABG, Bueno HMS, Battlehner CN, Mauad T, Caldini EG, Saldiva PHN. Structural alterations in adult rat carotid bodies exposed to hyperbaric oxygenation. Undersea Hyperb Med 2010; 37:419-432. [PMID: 21226393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
UNLABELLED Inhibition of carotid body (CB) function is the main mechanism involved in the attenuation of respiratory drive observed during hyperoxia. However, only a few studies at 5.0 atmospheres absolutes (ATA) have analyzed carotid body structure or function in hyperbaric oxygenation (HBO2) situations. We hypothesized that rats will present CB structural alterations when exposed to different lower hyperbaric oxygen doses enough to alter their chemosensory response to hypoxia. METHODS Twenty-one adult male Wistar rats, divided into three groups, were maintained in room air or exposed to O2 at 2.4 or 3.0 ATA for six hours. Histological, ultrastructural and immunohistochemical analyses for neuronal nitric oxide synthase (nNOS) and F2-isoprostane were performed in the excised CBs. RESULTS Histological analyses revealed signs of intracellular edema in animals exposed to both conditions, but this was more marked in the 3.0 ATA group, which showed ultrastructural alterations at the mitochondrial level. There was a significant increase in the volume density of intraglomic-congested capillaries in the 3.0 ATA group associated with an arteriolar vasoconstriction. In the 2.4 ATA group, there was a relative increase of glomic light cells and a decrease of glomic progenitor cells. Additionally, there was a stronger immunoreactivity for F2-isoprostane in the 3.0 ATA O2-exposed carotid bodies. The glomic cells stained positive for nNOS, but no difference was observed between the groups. Our results show that high O2 exposures may induce structural alterations in glomic cells with signs of lipid peroxidation. We further suggest that deviation of blood flow toward intraglomic capillaries occurs in hyperbaric hyperoxia.
Collapse
Affiliation(s)
- M S Leite
- Experimental Air Pollution Laboratory, Department of Pathology, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil.
| | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Piccin VS, Calciolari C, Yoshizaki K, Gomes S, Albertini-Yagi C, Dolhnikoff M, Macchione M, Caldini EG, Saldiva PHN, Negri EM. Effects of different mechanical ventilation strategies on the mucociliary system. Intensive Care Med 2010; 37:132-40. [DOI: 10.1007/s00134-010-2056-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2010] [Accepted: 09/09/2010] [Indexed: 10/18/2022]
|
15
|
Nita LM, Battlehner CN, Ferreira MA, Imamura R, Sennes LU, Caldini EG, Tsuji DH. The presence of a vocal ligament in fetuses: a histochemical and ultrastructural study. J Anat 2010; 215:692-7. [PMID: 19930519 DOI: 10.1111/j.1469-7580.2009.01146.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Although it is currently believed that the vocal ligament of humans undergoes considerable development postnatally, there is no consensus as to the age at which it first emerges. In the newborn infant, the lamina propria has been described as containing a sparse collection of relatively unorganized fibres. In this study we obtained larynges from autopsy of human fetuses aged 7-9 months and used light and electron microscopy to study the collagenous and elastic system fibres in the lamina propria of the vocal fold. Collagen fibres were viewed using the Picrosirius polarization method and elastic system fibres were stained using Weigert's resorcin-fuchsin after oxidation with oxone. The histochemical and electron microscopic observations were consistent, showing collagen populations with an asymmetric distribution across different compartments of the lamina propria. In the central region, the collagen appeared as thin, weakly birefringent, greenish fibres when viewed using the Picrosirius polarization method, whereas the superficial and deep regions contained thick collagen fibres that displayed a strong red or yellow birefringence. These findings suggest that the thin fibres in the central region consist mainly of type III collagen, whereas type I collagen predominates in the superficial and deep regions, as has been reported in studies of adult vocal folds. Similarly, elastic system fibres showed a differential distribution throughout the lamina propria. Their distribution pattern was complementary to that of collagen fibres, with a much greater density of elastic fibres apparent in the central region than in the superficial and deep regions. This distribution of collagen and elastic fibres in the fetal vocal fold mirrors that classically described for the adult vocal ligament, suggesting that a vocal ligament has already begun to develop by the time of birth. The apparently high level of organization of connective tissue components in the newborn is in contrast to current hypotheses that argue that the mechanical stimuli of phonation are essential to the determination of the layered structure of the lamina propria and suggests that genetic factors may play a more significant role in the development of the vocal ligament than previously believed.
Collapse
Affiliation(s)
- Luciana M Nita
- Department of Otolaryngology, University of São Paulo School of Medicine, São Paulo, SP, Brazil.
| | | | | | | | | | | | | |
Collapse
|
16
|
Moraes-Silva IC, De La Fuente RN, Mostarda C, Rosa K, Flues K, Damaceno-Rodrigues NR, Caldini EG, De Angelis K, Krieger EM, Irigoyen MC. Baroreflex deficit blunts exercise training-induced cardiovascular and autonomic adaptations in hypertensive rats. Clin Exp Pharmacol Physiol 2009; 37:e114-20. [PMID: 19930428 DOI: 10.1111/j.1440-1681.2009.05333.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
1. Baroreceptors regulate moment-to-moment blood pressure (BP) variations, but their long-term effect on the cardiovascular system remains unclear. Baroreceptor deficit accompanying hypertension contributes to increased BP variability (BPV) and sympathetic activity, whereas exercise training has been associated with an improvement in these baroreflex-mediated changes. The aim of the present study was to evaluate the autonomic, haemodynamic and cardiac morphofunctional effects of long-term sinoaortic baroreceptor denervation (SAD) in trained and sedentary spontaneously hypertensive rats (SHR). 2. Rats were subjected to SAD or sham surgery and were then further divided into sedentary and trained groups. Exercise training was performed on a treadmill (five times per week, 50-70% maximal running speed). All groups were studied after 10 weeks. 3. Sinoaortic baroreceptor denervation in SHR had no effect on basal heart rate (HR) or BP, but did augment BPV, impairing the cardiac function associated with increased cardiac hypertrophy and collagen deposition. Exercise training reduced BP and HR, re-established baroreflex sensitivity and improved both HR variability and BPV. However, SAD in trained SHR blunted all these improvements. Moreover, the systolic and diastolic hypertensive dysfunction, reduced left ventricular chamber diameter and increased cardiac collagen deposition seen in SHR were improved after the training protocol. These benefits were attenuated in trained SAD SHR. 4. In conclusion, the present study has demonstrated that the arterial baroreflex mediates cardiac disturbances associated with hypertension and is crucial for the beneficial cardiovascular morphofunctional and autonomic adaptations induced by chronic exercise in hypertension.
Collapse
Affiliation(s)
- I C Moraes-Silva
- Experimental Hypertension Laboratory, Hypertension Unit, Heart Institute, Sao Paulo, Brazil
| | | | | | | | | | | | | | | | | | | |
Collapse
|
17
|
Mostarda C, Rogow A, Silva ICM, De La Fuente RN, Jorge L, Rodrigues B, Heeren MV, Caldini EG, De Angelis K, Irigoyen MC. Benefits of exercise training in diabetic rats persist after three weeks of detraining. Auton Neurosci 2008; 145:11-6. [PMID: 19022707 DOI: 10.1016/j.autneu.2008.10.010] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2008] [Revised: 09/24/2008] [Accepted: 10/09/2008] [Indexed: 11/17/2022]
Abstract
Regarding all benefits of exercise training, a question remains: how long are these benefits kept? This study evaluated the effect of 3-week detraining after 10 weeks of training in STZ-diabetic rats. Male Wistar rats were assigned into: sedentary controls, trained controls, trained-detrained controls, sedentary diabetic, trained diabetic and trained-detrained diabetic. Arterial pressure (AP) and heart rate (HR) were recorded by a data acquisition system. Baroreflex sensitivity (BRS) was evaluated by HR responses to AP changes induced by infusion of vasoactive drugs. Intrinsic heart rate (IHR), sympathetic tonus (ST) and vagal tonus (VT) were evaluated by pharmacological blockade with atenolol and atropine. Spectral analysis of systolic AP and HR variabilities (HRV) was performed to estimate autonomic modulation to the heart and vessels. Diabetes cardiovascular and autonomic dysfunctions were reversed by exercise training and partially maintained in the 3-week detraining period. In controls, training decreased AP and HR and improved BRS, changes that returned to baseline values after detraining. IHR and VT were improved in trained diabetic rats and remained in detrained diabetic ones. LF component of HRV decreased in trained control group. In diabetics, exercise training improved variance, and absolute LF and HF components of HRV. Only HF was maintained in detrained diabetic group. Moreover, there was an inverse relationship between plasma glucose and the absolute HF component of HRV. These changes probably determined the different survival rate of 80% in diabetic detrained and 51% in diabetic sedentary rats.
Collapse
Affiliation(s)
- Cristiano Mostarda
- Heart Institute (InCor), University of Sao Paulo - Medical School - FMUSP, Brazil
| | | | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Borges LF, Caldini EG, Battlhener CN, Garcia SB, Zucoloto S, Montes GS, Taboga SR. Differential distribution of some extracellular matrix fibers in an experimentally denervated rat megaileum. Micron 2008; 39:397-404. [PMID: 17433699 DOI: 10.1016/j.micron.2007.03.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2007] [Revised: 03/08/2007] [Accepted: 03/09/2007] [Indexed: 11/21/2022]
Abstract
Absence of enteric neurons is associated with thickening of the intestinal muscularis externa in Chagas' disease. The thickening is due to hyperplasia and hypertrophy of the smooth muscle cells and increased extracellular matrix components. The influence of the nervous system on the structure of the smooth muscle cells and its associated matrix has been poorly investigated. An experimental model of denervation of the ileum in rats was performed by application of the surfactant agent benzalkonium chloride that selectively destroys the myenteric plexus. Three months later, ileal tissue samples were obtained and studied by histochemistry and transmission electron microsocopy. Sham operated rats were used as controls. The diameter of collagen fibrils was evaluated in electron micrographs. The histopathological analysis showed thickening of the muscular layer. The thin and weakly arranged collagen and reticulin fibers surrounding the smooth muscle cells, observed in control cases by Picrosirius polarization (PSP) stain method, corresponded to a population of loosely packed thin collagen fibrils of uniform diameters (mean=29.16 nm) at the ultrastructural level. In contrast, the thick and strongly birefringent fibers around the muscle cells, observed in the treated group, stained by PSP, corresponded to densely packed thicker fibrils with large variation in diameter (mean=39.41 nm). Comparison of the data demonstrated statistically significant difference between the groups suggesting that the replacement of loosely arranged reticulin fibers by fibrous tissue (with typical collagen fiber), may alter the biomechanical function resulting in impairment of muscular contraction.
Collapse
Affiliation(s)
- Luciano F Borges
- Laboratory of Cell Biology, Department of Pathology, The University of São Paulo School of Medicine, São Paulo, Brazil
| | | | | | | | | | | | | |
Collapse
|
19
|
Andrade GB, Ladeira SL, Battlehner CN, Saldiva PHN, Caldini EG. Molecular and ultrastructural studies of the fibrotic lesions of bovine focal proliferative fibrogranulomatous panniculitis (Lechiguana). Vet Res Commun 2007; 32:65-74. [PMID: 17492489 DOI: 10.1007/s11259-007-9003-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2006] [Accepted: 03/29/2007] [Indexed: 10/23/2022]
Abstract
This work aimed to investigate some aspects related to the pathogenicity of Lechiguana, a bovine fibroproliferative lesion characterized by rapid collagen accumulation. Light and transmission electron microscopy and in situ hybridization studies were performed in order to elucidate the fibrogenic activity of this lesion. The characterization of fibroblastic plasticity in the lesion was done by immunohistochemical study for alpha-smooth-muscle cell actin. The ovoid-shaped cells presented positive reaction for alpha-smooth-muscle cell actin in their cytoplasm and, at the electron-microscopic level demonstrated basal lamina-like material adjacent to the external surface and collagen fibrils that corresponded to a cell population phenotypically similar to the myofibroblast. We also investigated alpha1 collagen type I mRNA at different times of evolution of Lechiguana lesions, using isotopic and non-isotopic in situ hybridization. The results strongly suggest the involvement of a myofibroblast-like cell population that expresses mRNA for type I collagen and is probably associated with the increase of collagen deposition.
Collapse
Affiliation(s)
- G B Andrade
- Department of Epidemiology and Public Health, Rural Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
| | | | | | | | | |
Collapse
|
20
|
Nogueira AC, Hoshino W, Gonzaga L, Reze V, Duarte A, Valeri C, Branquinho P, Seckler M, Estumano E, Kawabata V, Noritomi D, Cappi S, Lins M, Miranda M, Sichieri K, Maia F, Colombo AS, Azevedo EL, Martins BCS, Bernik M, Caldini EG, Lotufo PA, Soriano FG. Mitochondrial injury in sepsis. Crit Care 2007. [PMCID: PMC3301144 DOI: 10.1186/cc5804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
21
|
Soriano FG, Nogueira AC, Caldini EG, Lins MH, Teixeira AC, Cappi SB, Lotufo PA, Bernik MMS, Zsengellér Z, Chen M, Szabó C. Potential role of poly(adenosine 5'-diphosphate-ribose) polymerase activation in the pathogenesis of myocardial contractile dysfunction associated with human septic shock. Crit Care Med 2006; 34:1073-9. [PMID: 16484919 DOI: 10.1097/01.ccm.0000206470.47721.8d] [Citation(s) in RCA: 86] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE Sepsis is associated with increased production of superoxide and nitric oxide, with consequent peroxynitrite generation. Cardiodepression is induced in the heart during oxidative stress associated with septic shock. Oxidative and nitrosative stress can lead to activation of the nuclear enzyme poly(adenosine 5'-diphosphate [ADP]-ribose) polymerase (PARP), with subsequent loss of myocardial contractile function. The aim of the study was to investigate whether cardiodepression found in septic patients is associated with plasma markers of myocardial necrosis and with myocardial PARP activation. DESIGN Prospective and observational study. SETTING University hospital intensive care unit for clinical and surgical patients. PATIENTS Twenty-five patients older than 18 yrs presenting with severe sepsis or septic shock. Patients with history of chronic heart failure, cancer, coronary artery disease, diabetes, or acquired immune deficiency syndrome were excluded. INTERVENTIONS Patients were followed for 28 days, and biochemical and hemodynamic data were collected on days 1, 3, and 6 of sepsis. The groups were survivors and nonsurvivors, defined only after the end of clinical patient evolution. Heart sections from patients who died were analyzed with hematoxylin-eosin and Picro Sirius-Red immunostaining and with electron microscopy. MEASUREMENTS AND MAIN RESULTS The study population included 25 individuals, of whom 12 (48%) died during the 6 days of follow-up. The initial data of the inflammation marker C-reactive protein and Acute Physiologic and Chronic Health. Evaluation severity were similar in both groups (nonsurvivors, 26 +/- 2; survivors, 24 +/- 5; NS). Overall, an increase in plasma troponin level was related to increased mortality risk. In patients who died, significant myocardial damage was detected, and histologic analysis of heart sections showed inflammatory infiltration, increased collagen deposition, and derangement of mitochondrial cristae. Immunohistochemical staining for poly(ADP-ribose) (PAR), the product of activated PARP, was demonstrated in septic hearts. There was a positive correlation between PAR staining densitometry and troponin I (r(2) = 0.73; p < .05), and the correlation of PAR staining densitometry and left ventricular systolic stroke work index was r(2) = 0.33 (p = .0509). CONCLUSION There is significant PARP activation in the hearts of septic patients with impaired cardiac function. We hypothesize that PARP activation may be partly responsible for the cardiac depression seen in humans with severe sepsis.
Collapse
|
22
|
Pinheiro MC, Mora OA, Caldini EG, Battlehner CN, Joazeiro PP, Toledo OMS. Ultrastructural, immunohistochemical and biochemical analysis of glycosaminoglycans and proteoglycans in the mouse pubic symphysis during pregnancy. Cell Biol Int 2005; 29:458-71. [PMID: 15951206 DOI: 10.1016/j.cellbi.2004.11.025] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2003] [Revised: 11/20/2004] [Accepted: 11/30/2004] [Indexed: 11/30/2022]
Abstract
During pregnancy, an interpubic ligament is formed in the mouse pubic symphysis. In late stages, this ligament undergoes "relaxation" to allow proper delivery, which is expected on the 19th day. Proteoglycans and hyaluronic acid play an important role in the remodeling of the extracellular matrix in these tissues. Glycosaminoglycans and proteoglycans were studied by electron microscopic, immunohistochemical and biochemical methods in samples of mouse pubic symphysis from the 12th to 18th day of pregnancy. At the ultrastructural level, using cuprolinic blue and enzymatic digestion by chondroitin lyases, two types of proteoglycan filaments were observed in the fibrocartilage on the 12th day, as well as in D 15, D 17 and D 18 pubic ligaments. The only sulfated glycosaminoglycan in these filaments was chondroitin sulfate, as shown by chondroitin lyase treatment. Their electrophoretic mobility, before and after enzymatic degradation, corroborated this inference. The ratio of chondroitin sulfate/dry weight of symphysis showed two phases of increase: between D12 and D 15, and between D 17 and D 18. We suggest that the first corresponds mainly to an increase in decorin when the ligament is formed, and the second to versican, during "relaxation". Versican and hyaluronic acid, working as water holding molecules would be responsible for the hydration of the ligament at the end of pregnancy, allowing an increase in resiliency. The presence of hyaluronic acid was confirmed by labeling with HA-probe in the perichondrium, fibrocartilage and ligament. The role of collagen fibers as physical restrictors of the complete expansion of glycosaminoglycans and hyaluronic acid in tissue is discussed.
Collapse
Affiliation(s)
- M C Pinheiro
- Department of Cell Biology, Institute of Biology, UNICAMP, Campinas, São Paulo, Brazil
| | | | | | | | | | | |
Collapse
|
23
|
Pinheiro MC, Moraes SG, Battlehner CN, Caldini EG, Toledo OMS, Joazeiro PP. Histochemical and ultrastructural study of collagen fibers in mouse pubic symphysis during late pregnancy. Micron 2004; 35:685-93. [PMID: 15288647 DOI: 10.1016/j.micron.2004.04.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2003] [Revised: 03/29/2004] [Accepted: 04/10/2004] [Indexed: 11/30/2022]
Abstract
Reference is usually made to the parallel orientation towards the main line of exerted tension at the pubic joint in mice, for supporting forces applied to the joint. Despite the wealth of morphological information about the extracellular matrix in this joint, little is known regarding the involvement of the crimp of collagen fibers in the dramatic transformations occurring in this region during the last 3 days of pregnancy. Examination of the collagenous architecture suggests that the biomechanical properties are directly related to fibril diameters, composition of ground substance and changes in the bundle morphology, particularly in the crimp structure. The purpose of this study was to further describe the transformation of the collagen fibers of the pubic symphysis during late mouse pregnancy. We examined the architecture of collagen fibers in the symphysis and pubic ligament through the Picrosirius-polarization method and also through scanning electron microscopy to directly visualize and measure the crimping from pregnant and virgin mice. The crimp angle and the length of five consecutive crimps were measured according to Patterson-Kane et al. [Connect. Tissue Res. 36 (1997) 253]. It could be demonstrated that the angles progressively decreased and the crimp length increased, denoting that the fibers have untwisted during the relaxation process. Our findings suggest that a disruption of the helical arrangement of the collagen containing fibers may contribute to explaining the rapid remodeling that occurs at the end of pregnancy and that is responsible for an increase in pliancy and length of the pubic ligament in mice.
Collapse
Affiliation(s)
- M C Pinheiro
- Department of Cell Biology, Institute of Biology, UNICAMP, Caixa Postal 6109, 13083-970 Campinas, SP, Brazil
| | | | | | | | | | | |
Collapse
|
24
|
Battlehner CN, Caldini EG, Pereira JCR, Luque EH, Montes GS. How to measure the increase in elastic system fibres in the lamina propria of the uterine cervix of pregnant rats. J Anat 2003; 203:405-18. [PMID: 14620380 PMCID: PMC1571177 DOI: 10.1046/j.1469-7580.2003.00227.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
As the uterus enlarges to accommodate the growing fetus during pregnancy, the cervix behaves essentially as a barrier. During ripening and delivery, it needs to become soft and distensible to allow dilation and the passage of the conceptus. As the transformations of the collagen-containing fibres are known to be essential for ripening and delivery, it has been hypothesized that the elastic system fibres, owing to their intrinsic mechanical properties (reversible extensibility), could be involved in the shape-recovering process immediately after delivery. In sections stained by Weigert's resorcin-fuchsin (with previous oxidation), we describe the elastic system fibres in the lamina propria of the rat uterine cervix. They are distributed following different patterns when in the endocervix or in the ectocervical-vaginal region. A third distinctive pattern (named the 'elastic tendon') is described here for the first time in the uterine-cervical transition. A special morphometrical protocol has been designed in order to overcome problems during the quantification process. Using the so-called intercept counting method, it was possible to demonstrate that the elastic system fibres are increased in the cervix at the end of pregnancy. They may be involved in the immediate shape-recovering of the cervix after delivery as well as in helping to strengthen the anchoring of the epithelium to the lamina propria, thus minimizing birth trauma.
Collapse
Affiliation(s)
- C N Battlehner
- Laboratory for Cell Biology, The University of São Paulo School of Medicine, Brazil.
| | | | | | | | | |
Collapse
|
25
|
Mady C, Ianni BM, Arteaga E, Montes GS, Caldini EG, Andrade G, Giorgi MC, Saldiva PH. Relation between interstitial myocardial collagen and the degree of clinical impairment in Chagas' disease. Am J Cardiol 1999; 84:354-6, A9. [PMID: 10496454 DOI: 10.1016/s0002-9149(99)00295-7] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Cardiac performance is negatively associated with interstitial collagen in Chagas' cardiomyopathy. The magnitude of dysfunction is related to the degree of collagen, and this association seems to exhibit a threshold above it if definite cardiac deterioration occurs.
Collapse
Affiliation(s)
- C Mady
- Heart Institute and Department of Pathology, University of São Paulo Medical School, Brazil.
| | | | | | | | | | | | | | | |
Collapse
|
26
|
Leick-Maldonado EA, Lemos M, Tibério IF, Caldini EG, Montes GS, Martins MA, Saldiva PH. Differential distribution of elastic system fibers in control and bronchoconstricted intraparenchymatous airways in the guinea-pig lung. J Submicrosc Cytol Pathol 1997; 29:427-34. [PMID: 9397581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The elastic system fibers were studied at the light microscopic level by using Weigert's resorcin-fuchsin method after oxidation. This study was designed to describe the distribution of these fibers in intrapulmonary guinea-pig airways and to characterize their conformational changes during bronchoconstriction induced by methacholine aerosol. Airways present a palisade of elastic system fibers just beneath the epithelial basement membrane; these fibers are also present in the adventitial connective tissue. Thin fibers link the fibers located in the palisade among themselves and also connect them to those fibers located in the bronchial adventitial tissue, by traversing the airway smooth muscle. During bronchoconstriction, the fibers located beneath the epithelial basement membrane are divided into two components: one follows the epithelial invaginations towards airway lumen, while the other population remains attached through airway smooth muscle to the fibers located in the adventitial connective tissue. At the ultrastructural level, the findings corroborated those of the light microscopy and in addition, disclosed that typical mature elastic fibers and also elaunin fibers attach directly to the basal lamina, a feature that has not been reported previously in other tissues studied. This configuration is compatible with the idea that fibers of the elastic system restrict the mucosal folding during bronchoconstriction, and may also provide energy to restore airway configuration to its normal status after contraction.
Collapse
Affiliation(s)
- E A Leick-Maldonado
- Department of Pathology, Faculty of Medicine, University of São Paulo, Brazil
| | | | | | | | | | | | | |
Collapse
|
27
|
Luque EH, Bassani MM, Ramos JG, Maffini M, Canal A, Kass L, Caldini EG, Ferreira Júnior JM, Muñoz de Toro M, Montes GS. Leukocyte infiltration and collagenolysis in cervical tissue from intrapartum sheep. Zentralbl Veterinarmed A 1997; 44:501-10. [PMID: 9421953 DOI: 10.1111/j.1439-0442.1997.tb01136.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Sheep uterine cervices and cervical mucus were heavily infiltrated by neutrophils during labour, whereas samples of cervices obtained from non-pregnant controls had no infiltrate. The neutrophilic infiltrate of the sheep uterine cervix at term was not homogeneously distributed throughout the organ: luminal mucus contained more neutrophils than tissues which, in turn, displayed a differential distribution, the superficial subepithelial layer being more heavily infiltrated than the deeper submucous layers. A widespread collagenolysis was observed in the sheep uterine cervix at term. The homogeneous morphological aspect of degradation of collagen fibres throughout the whole cervical stroma contrasted with the above-mentioned differential distribution of neutrophils. On the basis of previous reports showing that collagenolysis follows the leukocytic invasion of human and rat cervices at term, a possible role for the neutrophilic infiltrate of the sheep uterine cervix is discussed.
Collapse
Affiliation(s)
- E H Luque
- Department of Human Physiology, Faculty of Biochemistry and Biological Sciences, Santa Fe, Argentina.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Caldini EG, Caldini N, De-Pasquale V, Strocchi R, Guizzardi S, Ruggeri A, Montes GS. Distribution of elastic system fibres in the rat tail tendon and its associated sheaths. Acta Anat (Basel) 1990; 139:341-8. [PMID: 1706129 DOI: 10.1159/000147022] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The distribution of elastic, elaunin and oxytalan fibres in tendons and tendon sheaths was studied by means of light and electron microscopy. The different fibres were characterised by comparing their typical ultrastructural pictures with a combination of selective staining techniques for light microscopy with the appropriate enzymatic digestions. Since it was observed that the rat tail tendon and its associated sheaths are not homogeneous structures from the point of view of the distribution of the elastic system fibres, a systematic description of the differential distribution of the oxytalan, elaunin and elastic fibres in the tendon and in the endo-, peri-, epi- and paratendineum is presented. Mature elastic fibres are present in the tendon and in the para-, epi- and endotendineum, whereas these fibres could not be detected in the peritendineum. Very many elaunin fibres are characteristically recognised in the endotendineum; these fibres are present in the peritendineum and in the tendon fascicles too, while the epi- and paratendineum are devoid of elaunin fibres. The peri- and endotendineum contain numerous oxytalan fibres, whereas these fibres are absent from the tendon fascicles and the epi- and paratendineum. The functional implications of the foregoing findings are discussed.
Collapse
Affiliation(s)
- E G Caldini
- University of Bologna Institute of Anatomy, Italy
| | | | | | | | | | | | | |
Collapse
|
29
|
Guizzardi S, Cojazzi G, Caldini N, Caldini EG, Govoni P. [Demineralized bovine bone matrix: diffractional characterization]. Boll Soc Ital Biol Sper 1988; 64:975-8. [PMID: 3245914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
30
|
Abstract
Various nerves of 6 representative species of mammals (including the human) were studied by the comparative association of the selective staining methods of light microscopy with the ultrastructural observation after tannic acid-glutaraldehyde fixation, which provided a reliable means of characterizing the different elastic system fibers. Although mature elastic fibers are not present in nerves, elastic-related fibers are frequently observed: oxytalan fibers are found mainly in the endoneurium, whereas elaunin fibers predominate in the epineurium. These fibers are longitudinally disposed, in a parallel orientation to the axons. The fact that these findings were consistently observed in the nerves of all species studied argues strongly in favor of the existence of a uniform structural pattern of distribution of elastic system fibers in nerves as a general phenomenon in mammals.
Collapse
Affiliation(s)
- J M Ferreira
- Department of Histology and Embryology, University of São Paulo, Brazil
| | | | | |
Collapse
|