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Machado-Rugolo J, Baldavira CM, Prieto TG, Olivieri EHR, Fabro AT, Rainho CA, Castelli EC, Ribolla PEM, Ab'Saber AM, Takagaki T, Nagai MA, Capelozzi VL. Concomitant TP53 mutation in early-stage resected EGFR-mutated non-small cell lung cancer: a narrative approach in a genetically admixed Brazilian cohort. Braz J Med Biol Res 2023; 56:e12488. [PMID: 37042869 PMCID: PMC10085757 DOI: 10.1590/1414-431x2023e12488] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 02/27/2023] [Indexed: 04/13/2023] Open
Abstract
TP53 mutations are frequent in non-small cell lung cancer (NSCLC) and have been associated with poor outcome. The prognostic and predictive relevance of EGFR/TP53 co-mutations in NSCLC is controversial. We analyzed lung tissue specimens from 70 patients with NSCLC using next-generation sequencing to determine EGFR and TP53 status and the association between these status with baseline patient and tumor characteristics, adjuvant treatments, relapse, and progression-free (PFS) and overall survival (OS) after surgical resection. We found the EGFR mutation in 32.9% of patients (20% classical mutations and 12.9% uncommon mutations). TP53 missense mutations occurred in 25.7% and TP53/EGFR co-mutations occurred in 43.5% of patients. Stage after surgical resection was significantly associated with OS (P=0.028). We identified an association between progression-free survival and poor outcome in patients with distant metastases (P=0.007). We found a marginally significant difference in OS between genders (P=0.057) and between mutant and wild type TP53 (P=0.079). In univariate analysis, distant metastases (P=0.027), pathological stage (IIIA-IIIB vs I-II; P=0.028), and TP53 status (borderline significance between wild type and mutant; P=0.079) influenced OS. In multivariable analysis, a significant model for high risk of death and poor OS (P=0.029) selected patients in stage IIIA-IIIB, with relapse and distant metastases, non-responsive to platin-based chemotherapy and erlotinib, with tumors harboring EGFR uncommon mutations, with TP53 mutant, and with EGFR/TP53 co-mutations. Our study suggested that TP53 mutation tends to confer poor survival and a potentially negative predictive effect associated with a non-response to platinum-based chemotherapy and erlotinib in early-stage resected EGFR-mutated NSCLC.
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Affiliation(s)
- J Machado-Rugolo
- Laboratório de Histomorfometria e Genômica Pulmonar, Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
- Centro de Avaliação de Tecnologias em Saúde, Hospital das Clínicas da Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - C M Baldavira
- Laboratório de Histomorfometria e Genômica Pulmonar, Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - T G Prieto
- Laboratório de Histomorfometria e Genômica Pulmonar, Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - E H R Olivieri
- Centro Internacional de Pesquisa/CIPE, AC Camargo Cancer Center, São Paulo, São Paulo, SP, Brasil
| | - A T Fabro
- Laboratório de Histomorfometria e Genômica Pulmonar, Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
- Departamento de Patologia e Medicina Legal, Laboratório de Medicina Respiratória, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | - C A Rainho
- Instituto de Biociências, Departamento de Ciências Químicas e Biológicas, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - E C Castelli
- Laboratório de Genética Molecular e Bioinformática, Unidade de Pesquisa Experimental, Faculdade de Medicina, Universidade Estadual Paulista, Botucatu, SP, Brasil
- Departamento de Patologia, Faculdade de Medicina, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - P E M Ribolla
- Instituto de Biotecnologia, Universidade Estadual Paulista, Botucatu, SP, Brasil
- Instituto de Biociências, Departamento de Bioestatística, Biologia Vegetal, Parasitologia e Zoologia, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - A M Ab'Saber
- Laboratório de Histomorfometria e Genômica Pulmonar, Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - T Takagaki
- Divisão de Pneumologia, Instituto do Coração, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - M A Nagai
- Departamento de Radiologia e Oncologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
- Laboratório de Genética Molecular, Centro de Pesquisa Translacional em Oncologia, Instituto do Câncer de São Paulo, São Paulo, SP, Brasil
| | - V L Capelozzi
- Laboratório de Histomorfometria e Genômica Pulmonar, Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
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Baldavira CM, Gomes LF, Cruz LTDL, Maria DA, Capelozzi VL. In vivo evidence of angiogenesis inhibition by β2-glycoprotein I subfractions in the chorioallantoic membrane of chicken embryos. ACTA ACUST UNITED AC 2021; 54:e10291. [PMID: 33470390 PMCID: PMC7812911 DOI: 10.1590/1414-431x202010291] [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: 06/10/2020] [Accepted: 09/18/2020] [Indexed: 11/22/2022]
Abstract
The vascular network expansion and functioning are important factors affecting normal intra-uterine fetal development. This study addressed the previously reported antiangiogenic potential of beta-2-glycoprotein I (β2GPI) in vivo in the chick embryo model of angiogenesis. The effects of two naturally occurring β2GPI forms on the development of the chorioallantoic membrane (CAM) vessels and the chicken embryo were investigated. β2GPI monomers and dimers were obtained by fractioned purification and characterized using SDS-PAGE, immunoblot, and ELISA. The egg exposure was performed by injection of small volumes of 2.5 µg/mL solutions of the β2GPI subfractions. Angiogenesis was evaluated through quantitative measurements of vascular architecture parameters in the captured CAM images, using computational analysis of texture contrasts and computer vision techniques. Quantitative information was assigned to the CAM vasculature modifications. In vivo, the β2GPI dimer completely halted the formation of CAM vessels and led to embryo death after 48 h of exposure. The β2GPI monomer allowed the embryo to develop up to the 10th day, despite early changes of CAM vessels. The impaired normal vessel growth proceeded as a self-limited effect. The β2GPI monomer-exposed eggs showed reduced vascularization on the 6th day of incubation, but embryos were viable on the 10th day of incubation, with ingurgitated CAM vessels implying sequelae of the angiogenesis inhibition. Both subfractions impaired CAM vasculature development. The β2GPI dimer proved to be largely more harmful than the β2GPI monomer. β2GPI modification by cleavage or dimerization may play a role in angiogenesis control in vivo.
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Affiliation(s)
- C M Baldavira
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - L F Gomes
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, SP, Brasil
| | - L T De La Cruz
- Laboratório de Sistemas Planctônicos, Instituto Oceanográfico, Universidade de São Paulo, São Paulo, SP, Brasil
| | - D A Maria
- Laboratório de Biologia Molecular, Instituto Butantan, São Paulo, SP, Brasil
| | - V L Capelozzi
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
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Kiss T, Silva PL, Huhle R, Moraes L, Santos RS, Felix NS, Santos CL, Morales MM, Capelozzi VL, Kasper M, Pelosi P, Gama de Abreu M, Rocco PRM. Comparison of different degrees of variability in tidal volume to prevent deterioration of respiratory system elastance in experimental acute lung inflammation. Br J Anaesth 2018; 116:708-15. [PMID: 27106975 DOI: 10.1093/bja/aew093] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/14/2015] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Variable ventilation improves respiratory function, but it is not known whether the amount of variability in tidal volume (VT) can be reduced in recruited lungs without a deterioration of respiratory system elastance. METHODS Acute lung inflammation was induced by intratracheal instillation of lipopolysaccharide in 35 Wistar rats. Twenty-eight animals were anaesthetized and ventilated in volume-controlled mode. Lungs were recruited by random variation of VT (mean 6 ml kg(-1), coefficient of variation 30%, normal distribution) for 30 min. Animals were randomly assigned to different amounts of VT variability (n=7 for 90 min per group): 30, 15, 7.5, or 0%. Lung function, diffuse alveolar damage, and gene expression of biological markers associated with cell mechanical stress, inflammation, and fibrogenesis were assessed. Seven animals were not ventilated and served as controls for post-mortem analyses. RESULTS A VT variability of 30%, but not 15, 7.5, or 0%, prevented deterioration of respiratory system elastance [Mean (SD) -7.5 (8.7%), P<0.05; 21.1 (9.6%), P<0.05; 43.3 (25.9), P<0.05; and 41.2 (16.4), P<0.05, respectively]. Diffuse alveolar damage was lower with a VT variability of 30% than with 0% and without ventilation, because of reduced oedema and haemorrhage. A VT variability of 30, 15, or 7.5% reduced the gene expression of amphiregulin, cytokine-induced neutrophil chemoattractant-1, and tumour necrosis factor α compared with a VT variability of 0%. CONCLUSIONS In this model of acute lung inflammation, a VT variability of 30%, compared with 15 and 7.5%, was necessary to avoid deterioration of respiratory system elastance and was not associated with lung histological damage.
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Affiliation(s)
- T Kiss
- Pulmonary Engineering Group, Department of Anesthesiology and Intensive Care Therapy, University Hospital Carl Gustav Carus, Dresden University of Technology, Dresden, Germany Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Centro de Ciências da Saúde, Rio de Janeiro, Brazil
| | - P L 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
| | - R Huhle
- Pulmonary Engineering Group, Department of Anesthesiology and Intensive Care Therapy, University Hospital Carl Gustav Carus, Dresden University of Technology, Dresden, Germany
| | - L Moraes
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Centro de Ciências da Saúde, Rio de Janeiro, Brazil
| | - R S Santos
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Centro de Ciências da Saúde, Rio de Janeiro, Brazil
| | - N S Felix
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Centro de Ciências da Saúde, Rio de Janeiro, Brazil
| | - C L Santos
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Centro de Ciências da Saúde, Rio de Janeiro, Brazil
| | - M M Morales
- Laboratory of Cellular and Molecular Physiology, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Centro de Ciências da Saúde, Rio de Janeiro, Brazil
| | - V L Capelozzi
- Department of Pathology, School of Medicine, University of São Paulo, São Paulo, Brazil
| | - M Kasper
- Institute of Anatomy, University Hospital Carl Gustav Carus, Dresden University of Technology, Dresden, Germany
| | - P Pelosi
- Department of Surgical Sciences and Integrated Diagnostics, IRCCS AOU San Martino-IST, University of Genoa, Genoa, Italy
| | - M Gama de Abreu
- Pulmonary Engineering Group, Department of Anesthesiology and Intensive Care Therapy, University Hospital Carl Gustav Carus, Dresden University of Technology, Dresden, Germany
| | - P R M Rocco
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Centro de Ciências da Saúde, Rio de Janeiro, Brazil
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Rangel MP, Antonangelo L, Acencio MMP, Faria CS, de Sá VK, Leão PS, Farhat C, Fabro AT, Longatto Filho A, Reis RM, Takagaki T, Capelozzi VL. Detection of sputum cofilin-1 as indicator of malignancy. ACTA ACUST UNITED AC 2018; 51:e7138. [PMID: 29846436 PMCID: PMC5999062 DOI: 10.1590/1414-431x20187138] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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: 10/28/2017] [Accepted: 01/12/2018] [Indexed: 11/21/2022]
Abstract
Cofilin-1 (CFL1), a small protein of 18 kDa, has been studied as a biomarker due to its involvement in tumor cell migration and invasion. Our aim was to evaluate CFL1 as an indicator of malignancy and aggressiveness in sputum samples. CFL1 was analyzed by ELISA immunoassay in the sputum of 73 lung cancer patients, 13 cancer-free patients, and 6 healthy volunteers. Statistical analyses included ANOVA, ROC curves, Spearman correlation, and logistic regression. Sputum CFL1 levels were increased in cancer patients compared to cancer-free patients and volunteers (P<0.05). High expression of sputum CFL1 was correlated to T4 stage (P=0.01) and N stage (P=0.03), tobacco history (P=0.01), and squamous cell carcinoma histologic type (P=0.04). The accuracy of sputum CFL1 in discriminating cancer patients from cancer-free patients and healthy volunteers were 0.78 and 0.69, respectively. CFL1 at a cut-off value of 415.25 pg/mL showed sensitivity/specificity of 0.80/0.70 in differentiating between healthy volunteers and cancer patients. Sputum CFL1 was also able to identify cancer-free patients from patients with lung cancer. The AUC was 0.70 and, at a cut-off point ≥662.63 pg/mL, we obtained 60% sensitivity and 54% specificity. Logistic regression analysis controlled for tobacco history, histologic types, and N stage showed that cancer cell-associated CFL1 was an independent predictor of death. Smoker patients with squamous cell carcinoma, lymph node metastasis and sputum CFL1>1.475 pg/mL showed augmented chance of death, suggesting lung cancer aggressiveness. CFL1 presented diagnostic value in detecting lung cancer and was associated to tumor aggressiveness.
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Affiliation(s)
- M P Rangel
- Departmento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - L Antonangelo
- Departmento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - M M P Acencio
- Divisão de Pneumologia, Instituto do Coração (Incor), Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - C S Faria
- Laboratório de Investigação Médica (LIM 03), Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - V K de Sá
- Departmento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - P S Leão
- Divisão de Pneumologia, Instituto do Coração (Incor), Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - C Farhat
- Departmento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - A T Fabro
- Departmento de Patologia, Faculdade de Medicina de Ribeirão Preto - Universidade de São Paulo, Ribeirão Prêto, SP, Brasil
| | - A Longatto Filho
- Laboratório de Investigação Médica (LIM 14), Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - R M Reis
- Centro de Pesquisa em Oncologia Molecular, Hospital de Câncer de Barretos, Fundação Pio XII, Barretos, SP, Brasil
| | - T Takagaki
- Divisão de Pneumologia, Instituto do Coração (Incor), Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - V L Capelozzi
- Departmento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
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de Araújo CC, Marques PS, Silva JD, Samary CS, da Silva AL, Henriques I, Antunes MA, de Oliveira MV, Goldenberg RC, Morales MM, Abreu I, Diaz BL, Rocha NN, Capelozzi VL, Rocco PRM. Regular and moderate aerobic training before allergic asthma induction reduces lung inflammation and remodeling. Scand J Med Sci Sports 2016; 26:1360-1372. [PMID: 27152850 DOI: 10.1111/sms.12614] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/08/2015] [Indexed: 12/13/2022]
Abstract
Experimental studies have reported that aerobic exercise after asthma induction reduces lung inflammation and remodeling. Nevertheless, no experimental study has analyzed whether regular/moderate aerobic training before the induction of allergic asthma may prevent these inflammatory and remodeling processes. For this purpose, BALB/c mice (n = 96) were assigned into non-trained and trained groups. Trained animals ran on a motorized treadmill at moderate intensity, 30 min/day, 3 times/week, for 8 weeks, and were further randomized into subgroups to undergo ovalbumin sensitization and challenge or receive saline using the same protocol. Aerobic training continued until the last challenge. Twenty-four hours after challenge, compared to non-trained animals, trained mice exhibited: (a) increased systolic output and left ventricular mass on echocardiography; (b) improved lung mechanics; (c) decreased smooth muscle actin expression and collagen fiber content in airways and lung parenchyma; (d) decreased transforming growth factor (TGF)-β levels in bronchoalveolar lavage fluid (BALF) and blood; (e) increased interferon (IFN)-γ in BALF and interleukin (IL)-10 in blood; and (f) decreased IL-4 and IL-13 in BALF. In conclusion, regular/moderate aerobic training prior to allergic asthma induction reduced inflammation and remodeling, perhaps through increased IL-10 and IFN-γ in tandem with decreased Th2 cytokines.
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Affiliation(s)
- C C de Araújo
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - P S Marques
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - J D Silva
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - C S Samary
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - A L da Silva
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - I Henriques
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - M A Antunes
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - M V de Oliveira
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - R C Goldenberg
- Laboratory of Cellular and Molecular Cardiology, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - M M Morales
- Laboratory of Cellular and Molecular Physiology, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - I Abreu
- Laboratory of Inflammation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - B L Diaz
- Laboratory of Inflammation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - N N Rocha
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.,Department of Physiology, Fluminense Federal University, Niteroi, Brazil
| | - V L Capelozzi
- Department of Pathology, Faculty of Medicine, University of São Paulo, São Paulo, Brazil
| | - P R M Rocco
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
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Sá VKD, Rocha TP, Moreira A, Soares FA, Takagaki T, Carvalho L, Nicholson AG, Capelozzi VL. Hyaluronidases and hyaluronan synthases expression is inversely correlated with malignancy in lung/bronchial pre-neoplastic and neoplastic lesions, affecting prognosis. ACTA ACUST UNITED AC 2015; 48:1039-47. [PMID: 26352698 PMCID: PMC4671531 DOI: 10.1590/1414-431x20154693] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [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: 01/16/2015] [Accepted: 05/12/2015] [Indexed: 02/06/2023]
Abstract
We collected a series of 136 lung/bronchial and 56 matched lung parenchyma tissue
samples from patients who underwent lung/bronchial biopsies and presented invasive
carcinoma after lung surgery. The lung/bronchial samples included basal cell
hyperplasia, squamous metaplasia, moderate dysplasia, adenomatous hyperplasia, severe
dysplasia, squamous cell carcinoma and adenocarcinoma. Matched lung parenchyma tissue
samples included 25 squamous cell carcinomas and 31 adenocarcinomas.
Immunohistochemistry was performed to analyze for the distribution of hyaluronidase
(Hyal)-1 and −3, and hyaluronan synthases (HAS)-1, −2, and −3. Hyal-1 showed
significantly higher expression in basal cell hyperplasia than in moderate dysplasia
(P=0.01), atypical adenomatous hyperplasia (P=0.0001), or severe dysplasia (P=0.03).
Lower expression of Hyal-3 was found in atypical adenomatous hyperplasia than in
basal cell hyperplasia (P=0.01) or moderate dysplasia (P=0.02). HAS-2 was
significantly higher in severe dysplasia (P=0.002) and in squamous metaplasia
(P=0.04) compared with basal cell hyperplasia. HAS-3 was significantly expressed in
basal cell hyperplasia compared with atypical adenomatous hyperplasia (P=0.05) and
severe dysplasia (P=0.02). Lower expression of HAS-3 was found in severe dysplasia
compared with squamous metaplasia (P=0.01) and moderate dysplasia (P=0.01).
Epithelial Hyal-1 and −3 and HAS-1, −2, and −3 expressions were significantly higher
in pre-neoplastic lesions than in neoplastic lesions. Comparative Cox multivariate
analysis controlled by N stage and histologic tumor type showed that patients with
high HAS-3 expression in pre-neoplastic cells obtained by lung/bronchial biopsy
presented a significantly higher risk of death (HR=1.19; P=0.04). We concluded that
localization of Hyal and HAS in lung/bronchial pre-neoplastic and neoplastic lesions
was inversely related to malignancy, which implied that visualizing these factors
could be a useful diagnostic procedure for suspected lung cancer. Finalizing this
conclusion will require a wider study in a randomized and prospective trial.
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Affiliation(s)
- V K de Sá
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - T P Rocha
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - Al Moreira
- Memorial Sloan-Kettering Cancer Center, New York, NY, USA
| | - F A Soares
- Departamento de Anatomia Patológica, A.C. Camargo Cancer Center, São Paulo, SP, Brasil
| | - T Takagaki
- Instituto do Coração, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - L Carvalho
- Universidade de Coimbra, Coimbra, Portugal
| | - A G Nicholson
- NHS Foundation Trust, National Heart and Lung Division, Imperial College, London, UK
| | - V L Capelozzi
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
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Colombo NBR, Rangel MP, Martins V, Hage M, Gelain DP, Barbeiro DF, Grisolia CK, Parra ER, Capelozzi VL. Caryocar brasiliense camb protects against genomic and oxidative damage in urethane-induced lung carcinogenesis. ACTA ACUST UNITED AC 2015. [PMID: 26200231 PMCID: PMC4568814 DOI: 10.1590/1414-431x20154467] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [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] [Indexed: 11/24/2022]
Abstract
The antioxidant effects of Caryocar brasiliense Camb, commonly known
as the pequi fruit, have not been evaluated to determine their protective effects
against oxidative damage in lung carcinogenesis. In the present study, we evaluated
the role of pequi fruit against urethane-induced DNA damage and oxidative stress in
forty 8-12 week old male BALB/C mice. An in vivo comet assay was
performed to assess DNA damage in lung tissues and changes in lipid peroxidation and
redox cycle antioxidants were monitored for oxidative stress. Prior supplementation
with pequi oil or its extract (15 µL, 60 days) significantly reduced urethane-induced
oxidative stress. A protective effect against DNA damage was associated with the
modulation of lipid peroxidation and low protein and gene expression of nitric oxide
synthase. These findings suggest that the intake of pequi fruit might protect against
in vivo genotoxicity and oxidative stress.
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Affiliation(s)
- N B R Colombo
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, BR
| | - M P Rangel
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, BR
| | - V Martins
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, BR
| | - M Hage
- Laboratório de Poluição Atmosférica, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, BR
| | - D P Gelain
- Departamento de Stress Oxidativo, Universidade do Rio Grande do Sul, Rio Grande do Sul, RS, BR
| | - D F Barbeiro
- Departamento de Emergência Clínica, Universidade de São Paulo, São Paulo, SP, BR
| | - C K Grisolia
- Departamento de Genética e Morfologia, Universidade de Brasília, Brasília, DF, BR
| | - E R Parra
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, BR
| | - V L Capelozzi
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, BR
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Rangel MP, de Sá VK, Martins V, Martins JRM, Parra ER, Mendes A, Andrade PC, Reis RM, Longatto-Filho A, Oliveira CZ, Takagaki T, Carraro DM, Nader HB, Capelozzi VL. Tissue hyaluronan expression, as reflected in the sputum of lung cancer patients, is an indicator of malignancy. ACTA ACUST UNITED AC 2015; 48:557-67. [PMID: 25992645 PMCID: PMC4470316 DOI: 10.1590/1414-431x20144300] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [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: 08/11/2014] [Accepted: 11/17/2014] [Indexed: 02/05/2023]
Abstract
Hyaluronan (HA) shows promise for detecting cancerous change in pleural effusion and
urine. However, there is uncertainty about the localization of HA in tumor tissue and
its relationship with different histological types and other components of the
extracellular matrix, such as angiogenesis. We evaluated the association between HA
and degree of malignancy through expression in lung tumor tissue and sputum. Tumoral
tissue had significantly increased HA compared to normal tissue. Strong HA staining
intensity associated with cancer cells was significant in squamous cell carcinoma
compared to adenocarcinoma and large cell carcinoma. A significant direct association
was found between tumors with a high percentage of HA and MVD (microvessel density)
in tumoral stroma. Similarly significant was the direct association between N1 tumors
and high levels of HA in cancer cells. Cox multivariate analysis showed significant
association between better survival and low HA. HA increased in sputum from lung
cancer patients compared to cancer-free and healthy volunteers and a significant
correlation was found between HA in sputum and HA in cancer tissue. Localization of
HA in tumor tissue was related to malignancy and reflected in sputum, making this an
emerging factor for an important diagnostic procedure in patients suspected to have
lung cancer. Further study in additional patients in a randomized prospective trial
is required to finalize these results and to validate our quantitative assessment of
HA, as well as to couple it to gold standard sputum cytology.
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Affiliation(s)
- M P Rangel
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - V K de Sá
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - V Martins
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - J R M Martins
- Disciplina de Biologia Molecular, Departamento de Bioquímica, Faculdade de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brasil
| | - E R Parra
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - A Mendes
- Disciplina de Biologia Molecular, Departamento de Bioquímica, Faculdade de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brasil
| | - P C Andrade
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - R M Reis
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, Universidade do Minho, Braga, Portugal
| | - A Longatto-Filho
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, Universidade do Minho, Braga, Portugal
| | - C Z Oliveira
- Centro de Pesquisa em Oncologia Molecular, Hospital de Câncer de Barretos, SP, Brasil
| | - T Takagaki
- Divisão de Pneumologia, Instituto do Coração, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - D M Carraro
- A.C. Camargo Cancer Center, São Paulo, SP, Brasil
| | - H B Nader
- Disciplina de Biologia Molecular, Departamento de Bioquímica, Faculdade de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brasil
| | - V L Capelozzi
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
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Parra ER, Pincelli MS, Teodoro WR, Velosa APP, Martins V, Rangel MP, Barbas-Filho JV, Capelozzi VL. Modeling pulmonary fibrosis by abnormal expression of telomerase/apoptosis/collagen V in experimental usual interstitial pneumonia. ACTA ACUST UNITED AC 2014; 47:567-75. [PMID: 24919172 PMCID: PMC4123836 DOI: 10.1590/1414-431x20143522] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [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: 09/17/2013] [Accepted: 03/06/2014] [Indexed: 11/22/2022]
Abstract
Limitations on tissue proliferation capacity determined by telomerase/apoptosis
balance have been implicated in pathogenesis of idiopathic pulmonary fibrosis. In
addition, collagen V shows promise as an inductor of apoptosis. We evaluated the
quantitative relationship between the telomerase/apoptosis index, collagen V
synthesis, and epithelial/fibroblast replication in mice exposed to butylated
hydroxytoluene (BHT) at high oxygen concentration. Two groups of mice were analyzed:
20 mice received BHT, and 10 control mice received corn oil. Telomerase expression,
apoptosis, collagen I, III, and V fibers, and hydroxyproline were evaluated by
immunohistochemistry, in situ detection of apoptosis, electron
microscopy, immunofluorescence, and histomorphometry. Electron microscopy confirmed
the presence of increased alveolar epithelial cells type 1 (AEC1) in apoptosis.
Immunostaining showed increased nuclear expression of telomerase in AEC type 2 (AEC2)
between normal and chronic scarring areas of usual interstitial pneumonia (UIP).
Control lungs and normal areas from UIP lungs showed weak green birefringence of type
I and III collagens in the alveolar wall and type V collagen in the basement membrane
of alveolar capillaries. The increase in collagen V was greater than collagens I and
III in scarring areas of UIP. A significant direct association was found between
collagen V and AEC2 apoptosis. We concluded that telomerase, collagen V fiber
density, and apoptosis evaluation in experimental UIP offers the potential to control
reepithelization of alveolar septa and fibroblast proliferation. Strategies aimed at
preventing high rates of collagen V synthesis, or local responses to high rates of
cell apoptosis, may have a significant impact in pulmonary fibrosis.
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Affiliation(s)
- E R Parra
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - M S Pincelli
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - W R Teodoro
- Disciplina de Reumatologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - A P P Velosa
- Disciplina de Reumatologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - V Martins
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - M P Rangel
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - J V Barbas-Filho
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
| | - V L Capelozzi
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
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10
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Santos GCD, Parra ER, Stegun FW, Cirqueira CS, Capelozzi VL. Immunohistochemical detection of virus through its nuclear cytopathic effect in idiopathic interstitial pneumonia other than acute exacerbation. Braz J Med Biol Res 2013; 46:985-992. [PMID: 24270907 PMCID: PMC3854334 DOI: 10.1590/1414-431x20132885] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [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: 01/24/2013] [Accepted: 08/26/2013] [Indexed: 11/22/2022] Open
Abstract
Idiopathic interstitial pneumonias include complex diseases that have a strong
interaction between genetic makeup and environmental factors. However, in many cases,
no infectious agent can be demonstrated, and these clinical diseases rapidly progress
to death. Theoretically, idiopathic interstitial pneumonias could be caused by the
Epstein-Barr virus, cytomegalovirus, adenovirus, hepatitis C virus, respiratory
syncytial virus, and herpesvirus, which may be present in such small amounts or such
configuration that routine histopathological analysis or viral culture techniques
cannot detect them. To test the hypothesis that immunohistochemistry provides more
accurate results than the mere histological demonstration of viral inclusions, this
method was applied to 37 open lung biopsies obtained from patients with idiopathic
interstitial pneumonias. As a result, immunohistochemistry detected measles virus and
cytomegalovirus in diffuse alveolar damage-related histological patterns of acute
exacerbation of idiopathic pulmonary fibrosis and nonspecific interstitial pneumonia
in 38 and 10% of the cases, respectively. Alveolar epithelium infection by
cytomegalovirus was observed in 25% of organizing pneumonia patterns. These findings
were coincident with nuclear cytopathic effects but without demonstration of
cytomegalovirus inclusions. These data indicate that diffuse alveolar damage-related
cytomegalovirus or measles virus infections enhance lung injury, and a direct
involvement of these viruses in diffuse alveolar damage-related histological patterns
is likely. Immunohistochemistry was more sensitive than the histological
demonstration of cytomegalovirus or measles virus inclusions. We concluded that all
patients with diffuse alveolar damage-related histological patterns should be
investigated for cytomegalovirus and measles virus using sensitive
immunohistochemistry in conjunction with routine procedures.
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Affiliation(s)
- G C Dos Santos
- Universidade de São Paulo, Disciplina de Pneumologia, Departamento de Patologia, Faculdade de Medicina, São PauloSP, Brasil
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11
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Parra ER, Aguiar Junior AC, Silva LO, Souza HSP, Espinoza JD, Capelozzi VL. Morphometric evaluation of nitric oxide synthase isoforms and their cytokine regulators predict pulmonary dysfunction and survival in systemic sclerosis. Braz J Med Biol Res 2013; 46:881-91. [PMID: 24141615 PMCID: PMC3854315 DOI: 10.1590/1414-431x20133061] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [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: 02/26/2013] [Accepted: 08/06/2013] [Indexed: 01/08/2023] Open
Abstract
Because histopathological changes in the lungs of patients with systemic
sclerosis (SSc) are consistent with alveolar and vessel cell damage, we presume
that this interaction can be characterized by analyzing the expression of
proteins regulating nitric oxide (NO) and plasminogen activator inhibitor-1
(PAI-1) synthesis. To validate the importance of alveolar-vascular interactions
and to explore the quantitative relationship between these factors and other
clinical data, we studied these markers in 23 cases of SSc nonspecific
interstitial pneumonia (SSc-NSIP). We used immunohistochemistry and morphometry
to evaluate the amount of cells in alveolar septa and vessels staining for NO
synthase (NOS) and PAI-1, and the outcomes of our study were cellular and
fibrotic NSIP, pulmonary function tests, and survival time until death. General
linear model analysis demonstrated that staining for septal inducible NOS (iNOS)
related significantly to staining of septal cells for interleukin (IL)-4 and to
septal IL-13. In univariate analysis, higher levels of septal and vascular cells
staining for iNOS were associated with a smaller percentage of septal and
vascular cells expressing fibroblast growth factor and myofibroblast
proliferation, respectively. Multivariate Cox model analysis demonstrated that,
after controlling for SSc-NSIP histological patterns, just three variables were
significantly associated with survival time: septal iNOS (P=0.04), septal IL-13
(P=0.03), and septal basic fibroblast growth factor (bFGF; P=0.02). Augmented
NOS, IL-13, and bFGF in SSc-NSIP histological patterns suggest a possible
functional role for iNOS in SSc. In addition, the extent of iNOS, PAI-1, and
IL-4 staining in alveolar septa and vessels provides a possible independent
diagnostic measure for the degree of pulmonary dysfunction and fibrosis with an
impact on the survival of patients with SSc.
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Affiliation(s)
- E R Parra
- Universidade de São Paulo, Departamento de Patologia, Faculdade de Medicina, São Paulo,SP, Brasil
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12
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de Sá VK, Carvalho L, Gomes A, Alarcão A, Silva MR, Couceiro P, Sousa V, Soares FA, Capelozzi VL. Role of the extracellular matrix in variations of invasive pathways in lung cancers. ACTA ACUST UNITED AC 2013; 46:21-31. [PMID: 23314337 PMCID: PMC3854345 DOI: 10.1590/1414-431x20122263] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [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: 03/29/2012] [Accepted: 09/06/2012] [Indexed: 01/28/2023]
Abstract
Among the most common features of highly invasive tumors, such as lung adenocarcinomas (AD) and squamous cell carcinomas (SqCC), is the massive degradation of the extracellular matrix. The remarkable qualitative and quantitative modifications of hyaluronidases (HAases), hyaluronan synthases (HAS), E-cadherin adhesion molecules, and the transforming growth factor β (TGF-β) may favor invasion, cellular motility, and proliferation. We examined HAase proteins (Hyal), HAS, E-cadherin, and TGF-β profiles in lung AD subtypes and SqCC obtained from smokers and non-smokers. Fifty-six patients, median age 64 years, who underwent lobectomy for AD (N = 31) and SqCC (N = 25) were included in the study. HAS-1, -2 and -3, and Hyal-1 and -3 were significantly more expressed by tumor cells than normal and stroma cells (P < 0.01). When stratified according to histologic types, HAS-3 and Hyal-1 immunoreactivity was significantly increased in tumor cells of AD (P = 0.01) and stroma of SqCC (P = 0.002), respectively. Tobacco history in patients with AD was significantly associated with increased HAS-3 immunoreactivity in tumor cells (P < 0.01). Stroma cells of SqCC from non-smokers presented a significant association with HAS-3 (P < 0.01). Hyal, HAS, E-cadherin, and TGF-β modulate a different tumor-induced invasive pathway in lung AD subgroups and SqCC. HAases in resected AD and SqCC were strongly related to the prognosis. Therefore, our findings suggest that strategies aimed at preventing high HAS-3 and Hyal-1 synthesis, or local responses to low TGF-β and E-cadherin, may have a greater impact in lung cancer prognosis.
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Affiliation(s)
- V K de Sá
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo São Paulo, SP, Brasil.
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13
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Parra ER, Falzoni R, Capelozzi VL. Vascular dysfunction by myofibroblast activation in patients with idiopathic pulmonary fibrosis and prognostic significance. Braz J Med Biol Res 2012; 45:665-75. [PMID: 22527129 PMCID: PMC3854274 DOI: 10.1590/s0100-879x2012007500066] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [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: 11/14/2011] [Accepted: 04/09/2012] [Indexed: 11/23/2022] Open
Abstract
In this study, we demonstrated the importance of telomerase protein expression and determined the relationships among telomerase, endothelin-1 (ET-1) and myofibroblasts during early and late remodeling of parenchymal and vascular areas in usual interstitial pneumonia (UIP) using 27 surgical lung biopsies from patients with idiopathic pulmonary fibrosis (IPF). Telomerase+, myofibroblasts α-SMA+, smooth muscle cells caldesmon+, endothelium ET-1+ cellularity, and fibrosis severity were evaluated in 30 fields covering normal lung parenchyma, minimal fibrosis (fibroblastic foci), severe (mural) fibrosis, and vascular areas of UIP by the point-counting technique and a semiquantitative score. The impact of these markers was determined in pulmonary functional tests and follow-up until death from IPF. Telomerase and ET-1 expression was significantly increased in normal and vascular areas compared to areas of fibroblast foci. Telomerase and ET-1 expression was inversely correlated with minimal fibrosis in areas of fibroblast foci and directly associated with severe fibrosis in vascular areas. Telomerase activity in minimal fibrosis areas was directly associated with diffusing capacity of the lung for oxygen/alveolar volume and ET-1 expression and indirectly associated with diffusing capacity of the lungs for carbon monoxide and severe fibrosis in vascular areas. Cox proportional hazards regression revealed a low risk of death for females with minimal fibrosis displaying high telomerase and ET-1 expression in normal areas. Vascular dysfunction by telomerase/ET-1 expression was found earlier than vascular remodeling by myofibroblast activation in UIP with impact on IPF evolution, suggesting that strategies aimed at preventing the effect of these mediators may have a greater impact on patient outcome.
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Affiliation(s)
- E R Parra
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil.
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14
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Parra ER, Araujo CAL, Lombardi JG, Ab'Saber AM, Carvalho CRR, Kairalla RA, Capelozzi VL. Lymphatic fluctuation in the parenchymal remodeling stage of acute interstitial pneumonia, organizing pneumonia, nonspecific interstitial pneumonia and idiopathic pulmonary fibrosis. ACTA ACUST UNITED AC 2012; 45:466-72. [PMID: 22488224 PMCID: PMC3854286 DOI: 10.1590/s0100-879x2012007500055] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [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: 11/07/2011] [Accepted: 03/21/2012] [Indexed: 11/24/2022]
Abstract
Because the superficial lymphatics in the lungs are distributed in the subpleural, interlobular and peribroncovascular interstitium, lymphatic impairment may occur in the lungs of patients with idiopathic interstitial pneumonias (IIPs) and increase their severity. We investigated the distribution of lymphatics in different remodeling stages of IIPs by immunohistochemistry using the D2-40 antibody. Pulmonary tissue was obtained from 69 patients with acute interstitial pneumonia/diffuse alveolar damage (AIP/DAD, N = 24), cryptogenic organizing pneumonia/organizing pneumonia (COP/OP, N = 6), nonspecific interstitial pneumonia (NSIP/NSIP, N = 20), and idiopathic pulmonary fibrosis/usual interstitial pneumonia (IPF/UIP, N = 19). D2-40+ lymphatic in the lesions was quantitatively determined and associated with remodeling stage score. We observed an increase in the D2-40+ percent from DAD (6.66 ± 1.11) to UIP (23.45 ± 5.24, P = 0.008) with the advanced process of remodeling stage of the lesions. Kaplan-Meier survival curves showed a better survival for patients with higher lymphatic D2-40+ expression than 9.3%. Lymphatic impairment occurs in the lungs of IIPs and its severity increases according to remodeling stage. The results suggest that disruption of the superficial lymphatics may impair alveolar clearance, delay organ repair and cause severe disease progress mainly in patients with AIP/DAD. Therefore, lymphatic distribution may serve as a surrogate marker for the identification of patients at greatest risk for death due to IIPs.
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Affiliation(s)
- E R Parra
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, Brasil.
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15
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Elhai M, Guerini H, Bazeli R, Avouac J, Freire V, Drape JL, Kahan A, Allanore Y, Abignano G, Cuomo G, Buch M, Rosenberg WM, Valentini G, Emery P, Del Galdo F, Martin P, Teodoro WR, Velosa AP, Carrasco S, de Morais J, Christmann RB, Parras ER, Capelozzi VL, Yoshinari NH, Cuomo G, Zappia M, Iudici M, Abignao G, Valentini G. S.7.1 Ultrasonographic hand features in systemic sclerosis and correlates with clinical, biological and radiographic findings. Rheumatology (Oxford) 2012. [DOI: 10.1093/rheumatology/ker501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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16
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Prado CM, da Rocha GZ, Leick-Maldonado EA, Starling CM, Capelozzi VL, Martins MA, Tibério IFLC. Inactivation of capsaicin-sensitive nerves reduces pulmonary remodeling in guinea pigs with chronic allergic pulmonary inflammation. Braz J Med Biol Res 2010; 44:130-9. [PMID: 21180881 DOI: 10.1590/s0100-879x2010007500151] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2010] [Accepted: 12/08/2010] [Indexed: 11/22/2022] Open
Abstract
Pulmonary remodeling is an important feature of asthma physiopathology that can contribute to irreversible changes in lung function. Although neurokinins influence lung inflammation, their exact role in the extracellular matrix (ECM) remodeling remains to be determined. Our objective was to investigate whether inactivation of capsaicin-sensitive nerves modulates pulmonary ECM remodeling in animals with chronic lung inflammation. After 14 days of capsaicin (50 mg/kg, sc) or vehicle administration, male Hartley guinea pigs weighing 250-300 g were submitted to seven inhalations of increasing doses of ovalbumin (1, 2.5, and 5 mg/mL) or saline for 4 weeks. Seventy-two hours after the seventh inhalation, animals were anesthetized and mechanically ventilated and the lung mechanics and collagen and elastic fiber content in the airways, vessels and lung parenchyma were evaluated. Ovalbumin-exposed animals presented increasing collagen and elastic fiber content, respectively, in the airways (9.2 ± 0.9; 13.8 ± 1.2), vessels (19.8 ± 0.8; 13.4 ± 0.5) and lung parenchyma (9.2 ± 0.9; 13.8 ± 1.2) compared to control (P < 0.05). Capsaicin treatment reduced collagen and elastic fibers, respectively, in airways (1.7 ± 1.1; 7.9 ± 1.5), vessels (2.8 ± 1.1; 4.4 ± 1.1) and lung tissue (2.8 ± 1.1; 4.4 ± 1.1) of ovalbumin-exposed animals (P < 0.05). These findings were positively correlated with lung mechanical responses to antigenic challenge (P < 0.05). In conclusion, inactivation of capsaicin-sensitive nerve fibers reduces pulmonary remodeling, particularly collagen and elastic fibers, which contributes to the attenuation of pulmonary functional parameters.
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Affiliation(s)
- C M Prado
- Departamento de Ciências Biológicas, Universidade Federal de São Paulo, Diadema, SP, Brazil.
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17
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Seiscento M, Vargas FS, Acencio MMP, Teixeira LR, Capelozzi VL, Sales RKB, Antonangelo L. Pleural fluid cytokines correlate with tissue inflammatory expression in tuberculosis. Int J Tuberc Lung Dis 2010; 14:1153-1158. [PMID: 20819261] [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: 05/29/2023] Open
Abstract
SETTING A tertiary care research centre in São Paolo, Brazil. OBJECTIVE To quantify interleukin (IL) 8, tumour necrosis factor alpha (TNF-alpha), vascular endothelial growth factor (VEGF) and transforming growth factor beta(1) (TGF-beta(1)) in pleural fluid from tuberculous patients, correlating its values with the histopathological patterns in pleural biopsies. DESIGN Cytokines were quantified in patients with transudates secondary to congestive heart failure (n = 8) and exudates secondary to tuberculosis (TB; n = 39). In parietal pleural biopsies from TB patients, the histological patterns of the inflammatory response were quantified by morphometric analysis (stereological point-counting method). RESULTS IL-8, TNF-alpha, VEGF and TGF-beta(1) levels were higher in TB than in transudates. A positive correlation existed between components of the fibrinoid exudative phase with pleural fluid IL-8 (R = 0.52, P = 0.004) and VEGF (R = 0.42, P = 0.0021) levels. A negative correlation existed between pleural fluid IL-8 (R = -0.37, P = 0.048) and VEGF (R = -0.44, P = 0.0015) levels with tissue components of fibroproliferation. CONCLUSION The high pleural levels of TNF-alpha, IL-8, VEGF and TGF-beta(1) suggest the involvement of these cytokines in the TB immunological response. The positive correlation between pleural fluid IL-8 and VEGF with the components of the acute exudative phase and the negative correlation between these cytokines with the fibroproliferative components suggest a temporary inflammatory response in the pleural space.
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Affiliation(s)
- M Seiscento
- Laboratory of Pleura, Pulmonary Division, Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil
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18
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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19
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Rossi VF, Vargas FS, Marchi E, Acencio MMP, Genofre EH, Capelozzi VL, Antonangelo L. Acute inflammatory response secondary to intrapleural administration of two types of talc. Eur Respir J 2009; 35:396-401. [PMID: 19679605 DOI: 10.1183/09031936.00039209] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Intrapleural instillation of talc has been used in the treatment of recurrent pleural effusions but can, in rare instances, result in respiratory failure. Side-effects seem to be related to composition, size and inflammatory power of talc particles. The aim of this study was to evaluate the inflammatory response to intrapleural injection of talc containing small particles (ST) or talc containing particles of mixed size (MT). 100 rabbits received intrapleural talc, 50 with ST (median 6.41 mum) and 50 with MT (median 21.15 mum); the control group was composed of 35 rabbits. Cells, lactate dehydrogenase, C-reactive protein (CRP), interleukin (IL)-8 and vascular endothelial growth factor were evaluated in serum and bronchoalveolar lavage at 6, 24, 48, 72 and 96 h. Lung histology and the presence of talc were also analysed. Statistics were performed using ANOVA and an unpaired t-test. Most of the parameters showed greater levels in the animals injected with talc than in the controls, suggesting a systemic and pulmonary response. Higher serum levels of CRP and IL-8 were observed in the animals injected with ST. Talc particles were observed in both lungs with no differences between groups. Lung cell infiltrate was more evident in the ST group. In conclusion, talc with larger particles should be the preferred choice in clinical practice in order to induce safer pleurodesis.
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Affiliation(s)
- V F Rossi
- R Itapeva 500, cjto 4C, Bela Vista, São Paulo, 01332-000, Brazil
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Oliveira HA, Ximenes M, Filho FB, Carvalho PH, GamaFilho JB, Parra ER, Capelozzi VL, Milanez DeCampos JR. Experimental selective sympathicotomy (ramicotomy) and sympathetic regeneration. Interact Cardiovasc Thorac Surg 2009; 9:411-5. [DOI: 10.1510/icvts.2009.202150] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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21
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Gabriel EA, Fagionato Locali R, Katsumi Matsuoka P, Santiago Almeida L, Guerreiro Silva I, Capelozzi VL, Salerno TA, Buffolo E. Lung perfusion during cardiac surgery with cardiopulmonary bypass: is it necessary? Interact Cardiovasc Thorac Surg 2008; 7:1089-95. [DOI: 10.1510/icvts.2008.184275] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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22
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Silva PL, Garcia CSNB, Maronas PA, Cagido VR, Negri EM, Damaceno-Rodrigues NR, Ventura GM, Bozza PT, Zin WA, Capelozzi VL, Pelosi P, Rocco PRM. Early short-term versus prolonged low-dose methylprednisolone therapy in acute lung injury. Eur Respir J 2008; 33:634-45. [DOI: 10.1183/09031936.00052408] [Citation(s) in RCA: 17] [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] [Indexed: 11/05/2022]
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23
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de Carvalho EF, Parra ER, de Souza R, A'b Saber AM, Machado JDC, Capelozzi VL. Arterial and interstitial remodelling processes in non-specific interstitial pneumonia: systemic sclerosis versus idiopathic. Histopathology 2008; 53:195-204. [PMID: 18752502 DOI: 10.1111/j.1365-2559.2008.03072.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIMS To compare septal and vascular matrix remodelling, vascular occlusion, pulmonary function tests and survival between two groups: one with idiopathic non-specific interstitial pneumonia (NSIP) and one with NSIP associated with systemic sclerosis (SSc). METHODS AND RESULTS Pulmonary biopsy specimens were examined from 40 patients, 22 with NSIP and 18 with NSIP associated with SSc. The content of septal collagen and elastic fibres, as well as the elastic fibres in the vascular interstitium, were higher in the SSc group (P = 0.01, P = 0.001 and P < 0.0001, respectively). Among pulmonary function tests, the diffusing capacity for carbon monoxide/alveolar volume was affected to a greater extent in the SSc group (59% of the predicted value in SSc and 97% in the idiopathic group). There were no differences in collagen content of the vascular interstitium, arterial occlusion, or survival between the two groups. CONCLUSIONS Although the fibrotic process is more intense in the SSc group, it does not affect the prognosis of these patients. Because the elastotic process is higher in the SSc group, this might suggest that autoimmune inflammatory mechanisms affecting the elastic fibre system play a greater role in the pathogenesis and pulmonary remodelling process of SSc NSIP than in idiopathic NSIP.
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Affiliation(s)
- E F de Carvalho
- Department of Pathology, University of Sao Paulo Medical School, Sao Paulo, Brazil
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24
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Parra ER, Noleto GS, Tinoco LJM, Capelozzi VL. Immunophenotyping and remodeling process in small airways of idiopathic interstitial pneumonias: functional and prognostic significance. The Clinical Respiratory Journal 2008; 2:227-38. [DOI: 10.1111/j.1752-699x.2008.00077.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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25
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Ranzani OT, Parra ER, de Morais Fernezlian S, Capelozzi VL. Intraluminal plugs in idiopathic and secondary organizing pneumonia: repair or remodelling? Histopathology 2007; 51:622-30. [DOI: 10.1111/j.1365-2559.2007.02845.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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26
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Massoni Neto LM, Bianchi CP, Ab'Saber AM, Parra ER, Takagaki T, Pereira JC, Soares FA, Leite K, Capelozzi VL. p53 immunostaining is correlated with reduced survival and is not correlated with gene mutations in resected pulmonary large cell carcinomas. Braz J Med Biol Res 2007; 40:1045-53. [PMID: 17665040 DOI: 10.1590/s0100-879x2006005000122] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [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: 11/10/2006] [Accepted: 04/10/2007] [Indexed: 11/22/2022] Open
Abstract
Malignancy of pulmonary large cell carcinomas (LCC) increases from classic LCC through LCC with neuroendocrine morphology (LCCNM) to large cell neuroendocrine carcinomas (LCNEC). However, the histological classification has sometimes proved to be difficult. Because the malignancy of LCC is highly dependent on proteins with functions in the cell cycle, DNA repair, and apoptosis, p53 has been targeted as a potentially useful biological marker. p53 mutations in lung cancers have been shown to result in expression and protein expression also occurs in the absence of mutations. To validate the importance of both p53 protein expression (by immunostaining) and p53 gene mutations in lung LCC (by PCR-single strand conformational polymorphism analysis of exons 5, 6, 7, and 8) and to study their relationships with clinical factors and sub-classification we investigated the correlation of p53 abnormalities in 15 patients with LCC (5 classic LCC, 5 LCNEC, and 5 LCCNM) who had undergone resection with curative intent. Of these patients, 5/15 expressed p53 and none had mutant p53 sequences. There was a negative survival correlation with positive p53 immunostaining (P = 0.05). After adjustment for stage, age, gender, chemotherapy, radiotherapy, and histological subtypes by multivariate analysis, p53 expression had an independent impact on survival. The present study indicates that p53 assessment may provide an objective marker for the prognosis of LCC irrespective of morphological variants and suggests that p53 expression is important for outcome prediction in patients with the early stages of LCC. The results reported here should be considered to be initial results because tumors from only 15 patients were studied: 5 each from LCC, LCNEC and LCCNM. This was due to the rarity of these specific diseases.
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MESH Headings
- Adult
- Aged
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/metabolism
- Carcinoma, Large Cell/genetics
- Carcinoma, Large Cell/metabolism
- Carcinoma, Large Cell/mortality
- Carcinoma, Large Cell/surgery
- Carcinoma, Neuroendocrine/genetics
- Carcinoma, Neuroendocrine/metabolism
- Carcinoma, Neuroendocrine/mortality
- Carcinoma, Neuroendocrine/surgery
- DNA, Neoplasm/analysis
- Exons
- Female
- Genes, p53/genetics
- Humans
- Immunohistochemistry
- Lung Neoplasms/genetics
- Lung Neoplasms/metabolism
- Lung Neoplasms/pathology
- Lung Neoplasms/surgery
- Male
- Middle Aged
- Mutation/genetics
- Neoplasm Staging
- Polymerase Chain Reaction
- Polymorphism, Single-Stranded Conformational
- Prognosis
- Survival Analysis
- Tumor Suppressor Protein p53/metabolism
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Affiliation(s)
- L M Massoni Neto
- Departamento de Patologia, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo
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27
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Saito DMS, Franco MR, Parra ER, Ab'saber AM, Farhat C, Eher E, Soufen MA, Rodrigues R, Capelozzi VL. Cell cycle regulator in primary lung adenocarcinoma and its haematogenous metastases. Histopathology 2007; 50:525-7. [PMID: 17448036 DOI: 10.1111/j.1365-2559.2007.02623.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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28
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Abstract
AIMS Silicosis is a chronic occupational disease caused by the inhalation of free crystalline silica particles which produce inflammation and tissue destruction followed by remodelling of the extracellular matrix. Apoptosis has been implicated in the development of the initial inflammation that triggers the remodelling process. Our aim was to elucidate the importance of Fas-ligand (Fas-L) in this disorder and to study the relationship between Fas-L and several other inflammatory and fibrotic remodelling markers. METHODS AND RESULTS We analysed 23 lung biopsies from silicotic patients and five controls, quantifying Fas-L and Bcl-2 expression by inflammatory cells as well as mast cells and collagen and elastic fibres. We used immunohistochemistry and morphometry to evaluate the amount of Fas-L and Bcl-2. Our analysis revealed that the silicotic lung stage was significantly related to Fas-L, mast cell and extracellular matrix remodelling. Fas-L expression was inversely associated with mast cells, collagen/elastic deposition and the silicotic lung. CONCLUSION Fas-L, mast cell staining and collagen/elastic fibre quantities in silicotic lungs are strongly related to silicosis progression.
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Affiliation(s)
- L Delgado
- Department of Pathology, University of São Paulo Medical School, São Paulo, Brazil
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29
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Garippo AL, Parra ER, Teodoro WR, Veloza AP, Yoshinari NH, Capelozzi VL. Immune Cell Infiltration and Broncovascular Remodeling After Nitric Acid Nasal Instillation in a Mouse Bronchiolitis Obliterans Model. Lung 2006; 184:229-38. [PMID: 17006750 DOI: 10.1007/s00408-005-2588-6] [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] [Accepted: 01/07/2006] [Indexed: 11/24/2022]
Abstract
Immune cell airway infiltration and the bronchovascular remodeling process have shown to be promising in the understanding of bronchiolitis obliterans (BO) pathogenesis. In this study we sought to validate the importance of immune cells, whether diffusely distributed or forming lymphoid follicles, collagen density, and vascular factors. Eight weeks after a single nitric acid (NA) nasal instillation, lung changes were characterized by lumen distortion, epithelial layer folding, reduction or total obliteration of terminal bronchiole (TB) lumen, and wall thickness increase. The morphologic changes in the TB and TA (terminal artery) lumen coincide with the measurement difference in the three groups. The TB diameter and lumen were significantly decreased in BO when compared with non-BO lungs (0.76 +/- 0.05 microm vs. 0.81 +/- 0.05 microm and 12,286.13 +/- 378.83 microm vs. 18,182.27 +/- 5,593.98 microm, p = 0.05 and p = 0.01, respectively). Equally significant was the increase in TB thickness in BO when compared with the non-BO group (201.72 +/- 35.75 microm vs. 149.75 +/- 40.61 microm, p = 0.007). The morphologic changes in immune cells seen in TB, TA, and bronchus-associated lymphoid tissue (BALT) also coincide with the quantification differences observed in the three groups. We concluded that immune cell infiltration and collagen/vascular remodeling are related to the spectrum of histologic changes in a BO nasal-induced model in mice and may be an appropriate target for prospective studies of human bronchiolitis.
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Affiliation(s)
- A L Garippo
- Department of Pathology, School of Medicine, University of São Paulo, São Paulo, Brazil
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30
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Rozin GF, Gomes MM, Parra ER, Kairalla RA, de Carvalho CRR, Capelozzi VL. Collagen and elastic system in the remodelling process of major types of idiopathic interstitial pneumonias (IIP). Histopathology 2005; 46:413-21. [PMID: 15810953 DOI: 10.1111/j.1365-2559.2005.02103.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.0] [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: 11/30/2022]
Abstract
AIMS Structural remodelling in acute and chronic idiopathic interstitial pneumonia (IIP) has been extensively investigated, but little attention has been directed to the elastic tissue in these situations. The aim of this study was to determine whether elastic deposition accompanies collagen deposition in the four major histological patterns of IIP: diffuse alveolar damage (DAD), organizing pneumonia (OP), non-specific interstitial pneumonia (NSIP) and usual interstitial pneumonia (UIP). METHODS AND RESULTS We measured, by image analysis, the content of fibres of the collagenous and elastic systems of the alveolar septum in histological slides of open lung biopsies, using the picrosirius-polarization method and Weigert's resorcin-fuchsin stain, respectively. Five groups were studied: 10 cases of DAD; nine cases of OP; nine cases of NSIP; and 10 cases of UIP. Four normal lungs were used for comparison. The content of collagen fibres was significantly higher in UIP when compared to DAD, NSIP, OP and normal lung. The content of elastic fibres was increased in comparison with normal lungs but this was not significantly different among the histological patterns. CONCLUSION Acute and chronic IIP cause a similar increase in the collagen and elastic contents of the lungs, representing a process of 'fibroelastosis' rather than an exclusive process of fibrosis. A profibrogenic mechanism is responsible for the unparallelled collagen augmentation observed in UIP subjects, the nature of which is yet to be determined.
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Affiliation(s)
- G F Rozin
- Department of Pathology, Division of Pulmonary Diseases, Heart Institute (InCor), Universidade de São Paulo, São Paulo, Brazil
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31
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Martins SJ, Ho N, Capelozzi VL, Takagaki TY. Thyroid transcription factor-1 and matrix metalloproteinase-9 in the prognostic assessment of patients with lung adenocarcinoma. J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.7207] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- S. J. Martins
- Hosp Santa Izabel, Salvador, Brazil; HC-FMUSP, São Paulo, Brazil
| | - N. Ho
- Hosp Santa Izabel, Salvador, Brazil; HC-FMUSP, São Paulo, Brazil
| | - V. L. Capelozzi
- Hosp Santa Izabel, Salvador, Brazil; HC-FMUSP, São Paulo, Brazil
| | - T. Y. Takagaki
- Hosp Santa Izabel, Salvador, Brazil; HC-FMUSP, São Paulo, Brazil
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32
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Rozin GF, Gomes MM, Parra ER, Kairalla RA, de Carvalho CRR, Capelozzi VL. Collagen and elastic system in the remodelling process of major types of idiopathic interstitial pneumonias (IIP). Histopathology 2005. [PMID: 15810953 DOI: 10.1111/his.2005.46.issue-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2023]
Abstract
AIMS Structural remodelling in acute and chronic idiopathic interstitial pneumonia (IIP) has been extensively investigated, but little attention has been directed to the elastic tissue in these situations. The aim of this study was to determine whether elastic deposition accompanies collagen deposition in the four major histological patterns of IIP: diffuse alveolar damage (DAD), organizing pneumonia (OP), non-specific interstitial pneumonia (NSIP) and usual interstitial pneumonia (UIP). METHODS AND RESULTS We measured, by image analysis, the content of fibres of the collagenous and elastic systems of the alveolar septum in histological slides of open lung biopsies, using the picrosirius-polarization method and Weigert's resorcin-fuchsin stain, respectively. Five groups were studied: 10 cases of DAD; nine cases of OP; nine cases of NSIP; and 10 cases of UIP. Four normal lungs were used for comparison. The content of collagen fibres was significantly higher in UIP when compared to DAD, NSIP, OP and normal lung. The content of elastic fibres was increased in comparison with normal lungs but this was not significantly different among the histological patterns. CONCLUSION Acute and chronic IIP cause a similar increase in the collagen and elastic contents of the lungs, representing a process of 'fibroelastosis' rather than an exclusive process of fibrosis. A profibrogenic mechanism is responsible for the unparallelled collagen augmentation observed in UIP subjects, the nature of which is yet to be determined.
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Affiliation(s)
- G F Rozin
- Department of Pathology, Division of Pulmonary Diseases, Heart Institute (InCor), Universidade de São Paulo, São Paulo, Brazil
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33
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Santana ANC, Takagaki TY, Barros JM, Antunes T, Parra ER, Capelozzi VL, Barbas CSV. Re: giant leg ulcer in Wegener's granulomatosis treated with plasmapheresis and skin graft. Dermatol Surg 2004; 30:1182-3. [PMID: 15274718 DOI: 10.1111/j.1524-4725.2004.30353.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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34
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Guedes JRP, Ferreira CM, Guimarães HMB, Saldiva PHN, Capelozzi VL. Homeopathically prepared dilution of Rana catesbeiana thyroid glands modifies its rate of metamorphosis. HOMEOPATHY 2004; 93:132-7. [PMID: 15287432 DOI: 10.1016/j.homp.2004.04.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
One strand of research on the scientific basis of homeopathy is based on inversion effects of dilutions and the biophysical properties of information transfer. A model developed by Endler, was the basis for the study of the influence of high-diluted solution (1:1026 part by weight) of thyroid glands on the rate of metamorphosis of the frog Rana catesbeiana from the no legged to four-legged stage. The glands were obtained from tadpoles and prepared according by (dilution and succussion). Similar pure hydroalcoholic solution (unsuccussed) was used as control. In order to identify significant differences in the frequencies of four-legged tadpoles, in homeopathic and control group, we used a chi-square goodness-of-fit test (P<0.01) and the cumulative risk for metamorphosis by Cox's Proportional Hazards model (P<0.05). The number of animals that reached the four-legged stage is generally smaller in the treated group, than in the hydroalcoholic control group. It was postulated that thyroid hormones transmitted information' specific to the molecules used to prepare the solution, even though the molarity was beyond Avogadro's number.
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Affiliation(s)
- J R P Guedes
- Laboratory of Molecular Pathology, University of São Paulo School of Medicine, SP, Brazil
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35
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Medeiros N, Rivero DHRF, Kasahara DI, Saiki M, Godleski JJ, Koutrakis P, Capelozzi VL, Saldiva PHN, Antonangelo L. Acute pulmonary and hematological effects of two types of particle surrogates are influenced by their elemental composition. Environ Res 2004; 95:62-70. [PMID: 15068931 DOI: 10.1016/j.envres.2003.07.007] [Citation(s) in RCA: 17] [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] [Received: 09/29/2002] [Revised: 07/11/2003] [Accepted: 07/16/2003] [Indexed: 05/24/2023]
Abstract
Several epidemiological studies have consistently demonstrated significant associations between ambient levels of particulate matter and lung injury and cardiovascular events with increased morbidity and mortality. Particle surrogates (PS), such as residual oil fly ash (ROFA), have been widely used in experimental studies aimed at characterizing the mechanisms of particle toxicity. Since PS composition varies depending on its source, studies with different types of PS may provide clues about the relative toxicity of the components generated by high-temperature combustion process. In this work, we have studied the effects of nasal instillation of increasing doses of different PS in mice: saline, carbon, and two types of particle surrogates. PS type A (PSA) was the ROFA collected from the waste incinerator of our university hospital; PS type B (PSB) was collected from the electrostatic precipitator of a large steel company and thus had an elevated metal content. After 24h, we analyzed hematological parameters, fibrinogen, bronchoalveolar lavage, bone marrow, and pulmonary histology. Nasal instillation of the two types of PS-induced leucopenia. PSB elicited a greater elevation of plasma fibrinogen levels. Bone marrow and pulmonary inflammatory changes were more intense for PSA. We concluded that the PS composition modulates acute inflammatory changes more significantly than the mass for these two types of PS.
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Affiliation(s)
- N Medeiros
- Department of Pathology, School of Medicine, University of São Paulo, Sao Paulo, Brazil.
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36
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Saito EH, Castro MPC, Menezes SLS, Haddad R, Antonangelo L, Teixeira LR, Negri EM, Capelozzi VL, Rocco PRM, Zin WA. Respiratory mechanics and pleural remodelling in pleurodesis induced by barium sulphate. Respir Physiol Neurobiol 2004; 139:271-80. [PMID: 15122993 DOI: 10.1016/j.resp.2003.10.008] [Citation(s) in RCA: 2] [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] [Accepted: 10/14/2003] [Indexed: 11/28/2022]
Abstract
The aim of this study was to determine whether an intrapleural injection of barium sulphate would produce pleurodesis in rats. Additionally, respiratory mechanics and pleural remodelling were analysed. Single intrapleural injection of barium sulphate (100%) or saline was given to Wistar rats. Respiratory system, lung, and chest wall elastic, resistive and viscoelastic/inhomogeneous pressures were measured by the end-inflation occlusion method at 2 and 30 days after injection. The pleura were examined for gross and histopathological evidence of pleural inflammation and fibrosis, and the underlying lungs were also studied by morphometry. All pulmonary mechanical parameters increased at day 2, but were not different from control at 30 days after injection. Chest wall mechanical parameters did not change. Macroscopic evaluation demonstrated pleural adherence without haemothorax. Histopathologic analysis showed pleural inflammation and fibrosis. There was no alveolar inflammation or fibrosis in both groups. In conclusion, barium sulphate induced pleurodesis with either no changes in respiratory mechanics or lung lesion at day 30.
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Affiliation(s)
- E H Saito
- Laboratory of Respiration Physiology, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Ilha do Fundão, 21949-900 Rio de Janeiro, RJ, Brazil
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37
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Minamoto H, Antonângelo L, da Silva AGP, Gallo CP, de Andrade e Silva FB, Fenezelian S, Rodrigues OR, Jatene F, Saldiva P, Capelozzi VL. Tumour cell and stromal features in metastatic and non-metastatic non-small cell lung carcinomas. Histopathology 2003; 43:427-43. [PMID: 14636269 DOI: 10.1046/j.1365-2559.2003.01704.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]
Abstract
AIMS Tumour cell behaviour depends on the interactions between nuclear genetic changes in the malignant cells and a stroma favourable for growth, invasion and metastasis. To evaluate such interactions, we studied the relationship between tumour cell and stromal features for proliferative factors, p53, microvessel density and metalloproteinases, controlled for the extent of the primary lesion (T1 to T4), in early (non-metastatic) and late (metastatic) non-small cell lung carcinomas (NSCLC). METHODS AND RESULTS Variables were examined for differences and correlations in the frequency of p53, AgNOR, CD34 and MMP-9 expression in primary lesions and metastases of NSCLC using a general linear model. The patients included 58 males and 22 females (mean age 62 +/- 9 years) with 19 T1 (23.8%), 40 T2 (50.0%), 14 T3 (17.5%) and seven T4 (8.8%). In late disease, AgNOR and p53 were statistically related to the extent of the primary lesion, whereas in early disease AgNOR tended to be increased in tumours without metastasis, while p53 expression tended to decrease progressively in tumours with metastasis. Microvessel density in late disease was of no statistical significance, whereas in early disease strong CD34 expression was seen in tumours with metastasis, being at its maximum in T3 primary lesions. The best marker for the extent of the lesion and its progression was MMP-9, with greater expression by tumours with metastasis than those without. CONCLUSIONS Different tumour cell and stromal interactions control metastasis and therefore the biological risk of NSCLC. A panel of molecular markers, such as p53, MMP-9 and CD34 could help to identify subgroups of patients that could benefit from adjuvant therapy.
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Affiliation(s)
- H Minamoto
- Department of Pathology, School of Medicine, University of São Paulo, São Paulo, Brazil
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38
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Terra-Filho M, Kavakama J, Bagatin E, Capelozzi VL, Nery LE, Tavares R. Identification of rounded atelectasis in workers exposed to asbestos by contrast helical computed tomography. Braz J Med Biol Res 2003; 36:1341-7. [PMID: 14502366 DOI: 10.1590/s0100-879x2003001000010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [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: 11/22/2022] Open
Abstract
Rounded atelectasis (RA) is a benign and unusual form of subpleural lung collapse that has been described mostly in asbestos-exposed workers. This form of atelectasis manifests as a lung nodule and can be confused with bronchogenic carcinoma upon conventional radiologic examination. The objective of the present study was to evaluate the variation in contrast uptake in computed tomography for the identification of asbestos-related RA in Brazil. Between January 1998 and December 2000, high-resolution computed tomography (HRCT) was performed in 1658 asbestos-exposed workers. The diagnosis was made in nine patients based on a history of prior asbestos exposure, the presence of characteristic (HRCT) findings and lesions unchanged in size over 2 years or more. In three of them the diagnosis was confirmed during surgery. The dynamic contrast enhancement study was modified to evaluate nodules and pulmonary masses. All nine patients with RA received iodide contrast according to weight. The average enhancement after iodide contrast was infused, reported as Hounsfield units (HU), increased from 62.5+/-9.7 to 125.4+/-20.7 (P < 0.05), with a mean enhancement of 62.5+/-19.7 (range 40 to 89) and with a uniform dense opacification. In conclusion, in this study all patients with RA showed contrast enhancement with uniform dense opacification. The main clinical implication of this finding is that this procedure does not permit differentiation between RA and malignant pulmonary neoplasm.
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Affiliation(s)
- M Terra-Filho
- Grupo Interinstitucional de Estudos de Doenças Relacionadas ao Amianto do Estado de São Paulo, Brasil
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39
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Pelosi P, D'Onofrio D, Chiumello D, Paolo S, Chiara G, Capelozzi VL, Barbas CSV, Chiaranda M, Gattinoni L. Pulmonary and extrapulmonary acute respiratory distress syndrome are different. Eur Respir J 2003; 42:48s-56s. [PMID: 12946001 DOI: 10.1183/09031936.03.00420803] [Citation(s) in RCA: 166] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Acute respiratory distress syndrome (ARDS) can be derived from two pathogenetic pathways: a direct insult on lung cells (pulmonary ARDS (ARDSp)) or indirectly (extrapulmonary ARDS (ARDSexp)). This review reports and discusses differences in biochemical activation, histology, morphological aspects, respiratory mechanics and response to different ventilatory strategies between ARDSp and ARDSexp. In ARDSp the direct insult primarily affects the alveolar epithelium with a local alveolar inflammatory response while in ARDSexp the indirect insult affects the vascular endothelium by inflammatory mediators through the bloodstream. Radiological pattern in ARDSp is characterised by a prevalent alveolar consolidation while the ARDSexp by a prevalent ground-glass opacification. In ARDSp the lung elastance, while in ARDSexp the chest wall and intra-abdominal chest elastance are increased. The effects of positive end-expiratory pressure, recruitment manoeuvres and prone position are clearly greater in ARDSexp. Although these two types of acute respiratory distress syndrome have different pathogenic pathways, morphological aspects, respiratory mechanics, and different response to ventilatory strategies, at the present, is still not clear, if this distinction can really ameliorate the outcome.
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Affiliation(s)
- P Pelosi
- Dept of Clinical and Biological Sciences, University of Insubria, Varese-Circolo and Fondazione Macchi Hospital, Varese, Italy
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40
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Genta PR, Valeri CB, Kairalla RA, Capelozzi VL, de Carvalho CRR. A 44-yr-old male with progressive dyspnoea and dry cough. Eur Respir J 2002; 20:786-8. [PMID: 12358359 DOI: 10.1183/09031936.02.02002001] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- P Rodrigues Genta
- Division of Respiratory Diseases, Heart Institute (InCor)/HC, São Paulo, Brazil.
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41
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Albuquerque DA, Seidl VR, Santos VC, Oliveira-Neto JA, Capelozzi VL, Rocco PR, Zin WA. The effect of experimental pleurodesis caused by aluminum hydroxide on lung and chest wall mechanics. Lung 2002; 179:293-303. [PMID: 11976897 DOI: 10.1007/s004080000069] [Citation(s) in RCA: 7] [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] [Accepted: 12/27/2001] [Indexed: 10/27/2022]
Abstract
The aim of this study was to evaluate the effect of a chemical sclerosing agent, aluminum hydroxide, on pleural remodeling and on respiratory mechanics in rats. Saline (2 mL) or aluminum hydroxide [2 mL (0.15 g/mL)] was instilled intrapleurally in anesthetized male rats. The animals were studied 7 or 30 days after the instillation. Respiratory system, lung, and chest wall elastic, resistive, and viscoelastic/inhomogeneous pressures were measured by the end-inflation occlusion method. We studied the pleural remodeling process by means of semiquantitative analysis of the induced inflammation and quantitative analysis of the collagen extracellular matrix component. The effects on the underlying lung were analyzed morphometrically. Chest wall elastic and viscoelastic pressures increased after aluminum hydroxide instillation independent of time after instillation. Pleural inflammation was observed 7 days after instillation, while pleural adherence with a marked increase in the type I/type III collagen ratio was present 30 days after instillation. Histological examination demonstrated no differences in lung parenchyma among the groups. In conclusion, the present model describes the establishment of pleurodesis by aluminum hydroxide, which thwarts the normal chest wall mechanical profile without inducing any changes in the underlying lungs. The results were disclosed by both mechanical and morphological evaluation of the pleural remodeling.
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Affiliation(s)
- D A Albuquerque
- Laboratory of Respiration Physiology, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Brazil
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42
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Hoelz C, Negri EM, Lichtenfels AJ, Conceção GM, Barbas CS, Saldiva PH, Capelozzi VL. Morphometric differences in pulmonary lesions in primary and secondary ARDS. A preliminary study in autopsies. Pathol Res Pract 2002; 197:521-30. [PMID: 11518044] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
The present study was undertaken in order to describe the morphological differences between pulmonary lesions in acute respiratory distress syndrome originating from direct pulmonary injury (ARDSp) and those originating from extrapulmonary injury (ARDSexp). We investigated a total of 38 ARDS-patients (27 males) ranging in age from 19 to 75 years, classified according to underlying disease in pulmonary (ARDSp) and extrapulmonary disease (ARDSexp). The extent of acute diffuse alveolar damage was assessed morphometrically on histologic gross sections in the upper and lower lobes of one lung. The lesions showed quantitative differences in extent and distribution according to underlying disease (primary pulmonary or secondary involvement). In pulmonary ARDS, a predominance of alveolar collapse (16.6%+/-12.3% versus 10.3%+/-11.9%, p = 0,03), fibrinous exudate (1.7%+/-3.2% versus 0.4%+/-1.1%, p = 0.01) and alveolar wall edema (11.2%+/-7.4% versus 6.6%+/-4.4%, p = 0,05) were found compared to extrapulmonary ARDS. We conclude that the morphology of acute diffuse alveolar damage (DAD) is mainly determined by underlying disease (pulmonary ARDS or extrapulmonary ARDS) differing in quantitative terms within the lung. Physiological, radiographic and respiratory system mechanics differences described in ARDSp and ARDSexp may therefore be due to morphometric differences in pulmonary lesions.
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Affiliation(s)
- C Hoelz
- Division of Respiratory Diseases, Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil
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43
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Matos HR, Capelozzi VL, Gomes OF, Mascio PD, Medeiros MH. Lycopene inhibits DNA damage and liver necrosis in rats treated with ferric nitrilotriacetate. Arch Biochem Biophys 2001; 396:171-7. [PMID: 11747294 DOI: 10.1006/abbi.2001.2611] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Experimental and epidemiological evidence suggests that lycopene, a carotenoid present in tomatoes, tomato products, and several fruits and vegetables, may play a role in preventing certain cancers in humans. We have investigated the effect of lycopene pretreatment on lipid peroxidation, oxidative damage to DNA, and histopathological changes in liver of animals subjected to intraperitoneal (ip) ferric nitrilotriacetate (Fe-NTA) administration. Compared with control rats, liver of Fe-NTA-treated animals showed a significant increase in the 8-oxo-7,8-dihydro-2'-deoxyguanosine level and a 75% increase in malondialdehyde accumulation concomitant with histopathological changes. Five days of lycopene pretreatment (10 mg/kg body weight, ip) almost completely prevented liver biomolecule oxidative damage and protected the tissue against the observed histological alterations.
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Affiliation(s)
- H R Matos
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, CP 26077, CEP 05513-970 São Paulo, SP, Brazil
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44
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Herson MR, Mathor MB, Altran S, Capelozzi VL, Ferreira MC. In vitro construction of a potential skin substitute through direct human keratinocyte plating onto decellularized glycerol-preserved allodermis. Artif Organs 2001; 25:901-6. [PMID: 11903144 DOI: 10.1046/j.1525-1594.2001.06896.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [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]
Abstract
This work demonstrates that glycerol-preserved acellular allodermis can be used as support for the proliferation of human keratinocytes and that the characteristics of this bioengineered tissue suggest its possible use as a permanent skin substitute for therapeutic challenges such as extensive burns as well as its possible use as an in vitro model for pharmacological studies. The removal of all basal membrane components during preparation of the dermal support also provides an original in vitro situation that allows observation of the reorganization of the dermal-epidermal junction. The tissue composite obtained is constituted of dermis covered by a well attached, multistratified epithelium with morphological characteristics that resemble human epidermis as evidenced by light and transmission electron microscopy, including the neoformation, albeit incomplete, of the dermal-epidermal junction. Assessment of involucrin and cytokeratin 14 expression by immunohistochemical assays established differentiation patterns. Both immerse and air-liquid interface culture systems were tested.
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Affiliation(s)
- M R Herson
- Plastic Surgery Research Laboratory, University of São Paulo School of Medicine, Brazil.
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45
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Rocco PR, Negri EM, Kurtz PM, Vasconcellos FP, Silva GH, Capelozzi VL, Romero PV, Zin WA. Lung tissue mechanics and extracellular matrix remodeling in acute lung injury. Am J Respir Crit Care Med 2001; 164:1067-71. [PMID: 11587998 DOI: 10.1164/ajrccm.164.6.2007062] [Citation(s) in RCA: 133] [Impact Index Per Article: 5.8] [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: 11/16/2022] Open
Abstract
UNLABELLED This study was undertaken to test whether there is structural remodeling of lung parenchyma that could lead to tissue mechanical changes at an early phase of varying degrees of acute lung injury (ALI). Tissue resistance (R), dynamic elastance (E), and hysteresivity (eta) were analyzed during sinusoidal oscillations of rat lung parenchymal strips 24 h after intraperitoneal injection of saline (C) or paraquat (P [10, 15, 25, and 30 mg/kg]). These strips were also stained in order to quantify the amount of collagen and of three types of elastic fibers (elaunin, oxytalan, and fully developed elastic fibers) in the alveolar septa. E augmented progressively from C to P25, but the data from the P25 and P30 groups were not different (p < 0.0001). R and eta increased from C to P10 and from P15 to P25 (p < 0.001). Collagen fiber content increased exponentially with the severity of the injury. Elaunin and fully developed elastic fibers remained unchanged in the five groups, while oxytalan fibers increased only in the P25 and P30 groups. In conclusion, the pronounced mechanical changes at the tissue level and fibroelastogenesis happened at an early phase of the disease and even in mildly abnormal lung parenchyma. KEYWORDS elastance; collagen fibers; elastin; paraquat
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Affiliation(s)
- P R Rocco
- Laboratory of Respiration Physiology, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Centro de Ciências da Saúde, Ilha do Fundão, Brazil
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46
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Iriya SM, Capelozzi VL, Calich I, Martins MA, Lichtenstein A. Causes of death in patients with systemic lupus erythematosus in São Paulo, Brazil: a study of 113 autopsies. Arch Intern Med 2001; 161:1557. [PMID: 11427107 DOI: 10.1001/archinte.161.12.1557] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Abstract
Asphyxia is a name given to different kinds of lesions that can produce similar histologic findings. Thus, because of the varied nature of the different kinds of lesions, as well as the incidence of similar qualitative histologic findings with different causes, the aim of this work was to study special kinds of injuries with particular subsequent impairment. These include some diagnostic problems of sudden death of natural causes, including aspiration, suffocation, drowning, and strangulation. Ranking was made of 167 victims based on the diagnosis as having: aspiration (n = 35), suffocation (n = 88), drowning (n = 27), and strangulation (n = 17). Stepwise discriminant analysis of the resulting data showed that lung necropsies from victims of these four events could be distinguished from one another. Statistical differences among the four groups were observed for eight morphologic parameters. A robust discriminant function permitted an adequate classification of the four groups of disease in 85.03% of the cases. Lung autopsies with congestion, septal hemorrhage, and foreign body showed a specificity of 100% for victims of aspiration, whereas ductal overinsufflation, interstitial edema, and bronchiolar constriction showed a specificity of 81.8% in victims of suffocation. Intraalveolar edema and dilatation of the alveolar spaces with secondary compression of the septal capillaries characterized drowning. Victims of strangulation showed a strong alveolar hemorrhage, with alveolar collapse and overinsufflation, associated with bronchiolar dilatation. It is concluded that semiquantitative analysis of lung autopsies might be a useful supplementary histologic criterion to support the diagnosis of asphyxia.
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Affiliation(s)
- C Delmonte
- Forensic Institute of Medicine, University of São Paulo School of Medicine, Brazil
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48
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Faffe DS, Silva GH, Kurtz PM, Negri EM, Capelozzi VL, Rocco PR, Zin WA. Lung tissue mechanics and extracellular matrix composition in a murine model of silicosis. J Appl Physiol (1985) 2001; 90:1400-6. [PMID: 11247940 DOI: 10.1152/jappl.2001.90.4.1400] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.2] [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: 11/22/2022] Open
Abstract
The dynamic mechanical properties of lung tissue and its contents of collagen and elastic fibers were studied in strips prepared from mice instilled intratracheally with saline (C) or silica [15 (S15) and 30 days (S30) after instillation]. Resistance, elastance, and hysteresivity were studied during oscillations at different frequencies on S15 and S30. Elastance increased from C to silica groups but was similar between S15 and S30. Resistance was augmented from C to S15 and S30 and was greater in S30 than in S15 at higher frequencies. Hysteresivity was higher in S30 than in C and S15. Silica groups presented a greater amount of collagen than did C. Elastic fiber content increased progressively along time. This increment was related to the higher amount of oxytalan fibers at 15 and 30 days, whereas elaunin and fully developed elastic fibers were augmented only at 30 days. Silicosis led not only to pulmonary fibrosis but also to fibroelastosis, thus assigning a major role to the elastic system in the silicotic lung.
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Affiliation(s)
- D S Faffe
- Laboratory of Respiration Physiology, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Ilha do Fundão, 21949 - 900 Rio de Janeiro, Brazil
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49
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Cury PM, Lichtenfels AJ, Reymão MS, Conceição GM, Capelozzi VL, Saldiva PH. Urban levels of air pollution modifies the progression of urethane-induced lung tumours in mice. Pathol Res Pract 2001; 196:627-33. [PMID: 10997738 DOI: 10.1016/s0344-0338(00)80006-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [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: 11/17/2022]
Abstract
This paper investigates the effects of air pollution in urethane-induced lung tumours in mice by means of histological, morphometrical, and DNA ploidy. The experimental exposure was done in locations with different air pollution profiles: a polluted area (downtown São Paulo) and a "clean" environment. Swiss mice were employed and urethane (3 g/kg) was used as a carcinogenic substance. All the animals, whether exposed or not to air pollution, were sacrificed after 6 months, and the lung lesions were analysed. The results showed a significant effect of air pollution on tumour progression, observed by changes in the phenotype of the tumour cells as demonstrated by morphometry and DNA ploidy. We observed more atypical adenomas in the air pollution-exposed group (p = 0.02). Coherently, morphometric differences were also detected between the two groups. Neoplasms of exposed mice exhibited an increase in the nuclear fraction (p = 0.002) and in the nucleus/cytoplasm ratio (p = 0.011), as a decrease in the stromal fraction (p < 0.001). There was a higher risk of aneuploidy in the 6-months-of-air-pollution-exposure group (relative risk: 1.58; 95% of confidence interval: 1.007 to 2.403). These results indicate that urban air pollution accelerates the process of progression towards malignancy.
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Affiliation(s)
- P M Cury
- Laboratório de Poluição Atmosférica Experimental, Faculdade de Medicina da Universidade de São Paulo, Brasil.
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50
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Barbas-Filho JV, Ferreira MA, Sesso A, Kairalla RA, Carvalho CR, Capelozzi VL. Evidence of type II pneumocyte apoptosis in the pathogenesis of idiopathic pulmonary fibrosis (IFP)/usual interstitial pneumonia (UIP). J Clin Pathol 2001; 54:132-8. [PMID: 11215282 PMCID: PMC1731356 DOI: 10.1136/jcp.54.2.132] [Citation(s) in RCA: 166] [Impact Index Per Article: 7.2] [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: 11/03/2022]
Abstract
BACKGROUND/AIMS The pathogenesis of idiopathic pulmonary fibrosis (IPF)/usual interstitial pneumonia (UIP), a chronic and incurable human respiratory disease, is not well established. This study was designed to investigate whether the apoptosis of type II pneumocytes could be the precipitating factor in the pathogenesis of IPF. METHODS Nineteen specimens obtained by retrospective review of the medical and pathological records of 55 patients with IPF, four normal subjects, and 10 disease control lungs were analysed. The selected specimens had normal alveoli with intervening patchy scarring of the lung parenchyma, fulfilling the pathological criteria for UIP. To identify individual cells undergoing apoptosis in the normal alveoli, electron microscopy and in situ end labelling of fragmented DNA were performed on paraffin was embedded sections using digoxigenin-11-dUTP and the enzyme terminal deoxynucleotidyl transferase. RESULTS Apoptosis was detected in the normal alveoli of 17 of the 19 patients with IPF/UIP and was absent in the controls. Electron microscopy demonstrated apoptotic changes in type II pneumocytes. These results indicate that apoptotic type II pneumocyte death occurs in normal alveoli of IPF/UIP and could be the principal cause of several events that account for the histological, clinical, and functional alterations seen in IPF/UIP. CONCLUSIONS In conclusion, numerous type II pneumocytes from the normal alveoli of most patients with IPF/UIP actively undergo programmed cell death. This finding may shed new light on the pathogenesis of this disease, with implications mainly for the treatment of affected patients.
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Affiliation(s)
- J V Barbas-Filho
- Department of Pathology, University of São Paulo School of Medicine, São Paulo, CEP 01250-020, Brazil. vcapelozzi@.lim05.fm.usp.br
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