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1.
Clin Ter ; 173(4): 342-346, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35857051

RESUMO

Background: Breast is a symbol of femininity, motherhood and sexuality. Breast cancer (BC) is the leading cause of cancer death in women worldwide and most frequent cancer in Italy: in 2019, 53.500 new cases were diagnosed. BC and its treatment, the disturbances of body image, and mental health problems such as anxiety and depression could influence sexuality. Very often the aspect of sexuality in BC is likely not to be fully investigated: cultural barriers may also contribute to lack of attention to these issues. In Italy, there are very few Breast Units that provide the figure of the sexologist and psycho-oncologist. Methods: We enlisted 141 BC patients (pts), mean age was 54 years afferent to Breast Unit S. Maria Goretti Hospital, Latina, from March 2019 to March 2020. All pts had undergone surgical intervention. Participants were invited to complete a structured questionnaire, which included four close-up questions regarding self-image, sexual activity, sexual satisfaction, analyzing these aspects before and after BC and its treatments. Finally the participants were asked if they needed the sexologist and psycho-oncologist. Results: Only 2/141 pts (1.41%) refused to participate in our study. Of 139 participants, 68 (48.92%) had disturbances of body image, 26 (18.7%) had sexuality greatly negatively affected, and 103 (74.1%) every kind of sexual dissatisfaction after BC. 38 pts (27.3%) would require the help of the sexologist. 135 ( 97%) would require the help of the psycho-oncologist. Despite the negative influence in their body-image and sexuality, few pts require the help of the sexologist, but nearly all pts require the help of the psycho-oncologist. Conclusion: In our study nearly all pts require the help of the psycho-oncologist, but few pts of the sexologist. Further studies will be needed to understand the reasons for this disparity: at the moment we are carrying out another project following this illustration, with the aim of understanding why this disparity.


Assuntos
Neoplasias da Mama , Imagem Corporal/psicologia , Neoplasias da Mama/complicações , Cicatriz , Feminino , Humanos , Pessoa de Meia-Idade , Qualidade de Vida/psicologia , Comportamento Sexual/psicologia , Sexualidade/psicologia
2.
J Appl Microbiol ; 121(4): 1163-71, 2016 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-27451131

RESUMO

AIM: The aim of this work was to evaluate the efficacy of domestic cooking in inactivating Manila clams experimentally infected with human hepatitis A virus (HAV). METHODS AND RESULTS: Electronic temperature probes were positioned to measure the internal temperature of Manila clams during domestic cooking. Two batches were infected with 10(7) and 10(5) TCID50  ml(-1) of HAV. The infected whole-in-shell clams were divided into three replicates and cooked on a conventional stove both singularly and in group and removed from the pan at fixed intervals. Pools of three digestive glands were examined by virus isolation for three blind passages and cell culture supernatant tested with real-time PCR. CONCLUSION: Results showed that 2-min cooking by a traditional domestic method at a temperature close to 100°C, after the opening up of the valves of all the clams, can completely devitalize the HAV in high viral load-infected clams. SIGNIFICANCE AND IMPACT OF THE STUDY: This is the first study on inactivation of HAV in experimentally infected Manila clams subjected to domestic cooking. At present, labelling all lagoon products as 'requiring cooking before consumption' is highly recommended, but no specifications are given on how long and at what temperature they should be cooked. Considering the high commercial value of Manila clams, our results can provide both the producers and the consumer with useful indications on how to cook clams to prevent the risk of HAV foodborne illness.


Assuntos
Bivalves/virologia , Culinária/métodos , Vírus da Hepatite A Humana/crescimento & desenvolvimento , Frutos do Mar/virologia , Animais , Bivalves/química , Culinária/instrumentação , Vírus da Hepatite A Humana/química , Vírus da Hepatite A Humana/isolamento & purificação , Temperatura Alta , Humanos , Frutos do Mar/análise , Inativação de Vírus
3.
Crit Rev Oncol Hematol ; 95(3): 387-96, 2015 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-25934521

RESUMO

BACKGROUND: Radical cystectomy (RC) represents the mainstay of treatment in patients with muscle-invasive urinary bladder cancer but how it compares with the best organ preservation approach is not known. MATERIALS AND METHODS: The objective of our review is to compare the 5-year overall survival (OS) rates from retrospective and prospective studies of RC and trimodality treatment (TMT), i.e. concurrent delivery of chemotherapy and radiotherapy after a transurethral resection of bladder tumor (TURBT), involving a total of 10,265 and 3131 patients, respectively. We used random-effect models to pool outcomes across studies and compared event rates of combined outcomes for TMT and RC using an interaction test. RESULTS: The median 5-year OS rate was 57% in the TMT group, when compared with 52% (P=0.04), 51% (P=0.02) and 53% (P=0.38) in the whole group receiving RC or the group treated with RC alone or RC+chemotherapy, respectively. The hazard risk (HR) of mortality of patients treated with TMT or RC was 1.22 (95% CI=1.13-1.32) with an absolute benefit of 5% in favor of the former. The HR of mortality from TMT persisted significantly better not only versus the group treated with RC alone (HR=1.22; 95% CI=1.12-1.32), but also versus the group receiving RC+chemotherapy (HR=1.22; 95% CI=1.09-1.36). Multivariate analysis confirmed TMT as a significant prognostic variable for both RC alone and RC+chemotherapy. CONCLUSION: Compared with RC, TMT seems to be associated with a better outcome for patients with muscle-invasive bladder cancer (MIBC). The addition of chemotherapy may improve the RC outcome in some subgroups of patients with a higher probability of micrometastases. Prospective randomized trials are urged to verify these findings and better define the role of organ preservation and radical treatment strategy in the management of patients with MIBC.


Assuntos
Cistectomia , Tratamentos com Preservação do Órgão , Neoplasias da Bexiga Urinária/terapia , Humanos , Invasividade Neoplásica , Taxa de Sobrevida , Neoplasias da Bexiga Urinária/mortalidade , Neoplasias da Bexiga Urinária/patologia
4.
G Ital Med Lav Ergon ; 34(3 Suppl): 617-20, 2012.
Artigo em Italiano | MEDLINE | ID: mdl-23405732

RESUMO

Wood dust can cause occupational-related naso-sinusal cancer, characterized by a latency period of about 40 years. The Tuscany Cancer Registry estimates that cases of NPSC are from 20-25 per year into the Region (33% related to wood dust). These neoplasms are surgically treatable at early-stage and, for this reason, a rapid endoscopic diagnosis is considered to be reasonably useful for prognostic issues. We used a questionnaire to investigate nasal symptoms and NOSQ and SOLAR questionnaires to highlight respiratory/skins diseases, and a spirometry for each worker. Subjects with a working-age of more than 15 years, and those that were positive to the questionnaire and/or to the medical history were were referred to a specialist in otolaryngology. The prevalence of endoscopic positive findings--detected especially in subjects with a working age of more than 15 years--confirms the significance of the problem.


Assuntos
Poeira , Exposição Ocupacional/efeitos adversos , Vigilância da População , Madeira , Adulto , Feminino , Humanos , Itália , Masculino , Controle de Qualidade
5.
Anal Chim Acta ; 707(1-2): 197-203, 2011 Nov 30.
Artigo em Inglês | MEDLINE | ID: mdl-22027139

RESUMO

A fully automated, non invasive, rapid and high-throughput method for the direct determination of sarcosine and N-ethylglycine in urine and urinary sediments using hexyl chloroformate derivatization followed by direct immersion solid-phase micro extraction and fast gas chromatography-mass spectrometric analysis was developed and validated. The use of a new ionic liquid narrow bore column, as well as the automation and miniaturization of the preparation procedure by a customized configuration of the utilized XYZ robotic system, allowed a friendly use of the GC apparatus achieving a quantitation limit of 0.06 µg L(-1) for sarcosine, good repeatability with CV always lower than 7% and reduced analysis times useful for point-of-care testing. The method was then applied for the analysis of 56 samples of urine and urinary sediments in healthy subjects, in those with benign prostatic hypertrophy and in patients with clinically localized prostate cancer. The results obtained showed that the medians of sarcosine/creatinine in urine were 103, 137 and 267 µg g(-1) respectively, thus assessing the potential use of sarcosine as urinary biomarker for prostate cancer detection. The highest values of sensitivity (79%) and specificity (87%) were obtained in correspondence of a cut-off value of 179 µg sarcosine(g creatinine)(-1), thus by using this cut-off threshold, sarcosine was significantly associated with the presence of cancer (p<0.0001). Finally, ROC analyses proved that the discrimination between clinically localized prostate cancer and patients without evidence of tumor is significantly correlated with sarcosine.


Assuntos
Cromatografia Gasosa-Espectrometria de Massas/métodos , Líquidos Iônicos/análise , Glicinas N-Substituídas/urina , Sarcosina/urina , Microextração em Fase Sólida/métodos , Humanos , Líquidos Iônicos/química , Masculino , Fatores de Tempo
7.
Minerva Chir ; 65(4): 401-7, 2010 Aug.
Artigo em Italiano | MEDLINE | ID: mdl-20802429

RESUMO

AIM: Several randomized trials on conservative surgery compared with mastectomy in early-stage breast cancer have validated this technique in terms of local and distant relapse and survival of patients. Standard conservative approach includes surgical removal of the cancer with adequate cancer-free margins, axillary dissection, postoperative breast irradiation and adjuvant treatments when required. METHODS: From 1987 to 2003, 500 early stage breast carcinoma were treated on 494 patients with conservative surgery and postoperative radiotherapy. Surgery consisted in a wide tumorectomy, with intraoperative control of R0 margins. The total postoperative radiation dosage was 50 Gy on the whole breast, associated with a boost of 10 Gy on tumor bed (20 Gy in T2 neoplasms). Before 1997 node-positive patients were treated with axillary irradiation with 50 Gy. Postoperative chemotherapy and/or hormonal therapy were administered to patients according with node-involvement, age and menopausal status. AJCC-stage was T1N0 in 44%, T2N0 in 15%, T1N1 in 19% and T2N1 in 22% of the patients. RESULTS: In a postoperative setting, we observed 9% of axillary seromas or hematomas and 7% of oedema of the arm. At a median follow-up of 150 months (range 48-248 months), actuarial local recurrence rates were 7% at 5 years and 14% at 10 years. The actuarial rates of distant metastases were 18% at 5 years and 33% at 10 years. Ten-year overall and disease-free survival rates were 81% and 60%, respectively. Cosmetic results were good/excellent in 80%, satisfactory in 10% and poor in 10% of patients. CONCLUSION: Recurrence and survival rates in breast-conserving surgery are consistent with indexed literature on conservative treatment of early breast cancer. Women eligible for conservative treatment should be offered the choice of either wide tumorectomy or quadrantectomy with axillary lymph nodes removal and postoperative radiotherapy, or modified radical mastectomy.


Assuntos
Neoplasias da Mama/patologia , Neoplasias da Mama/terapia , Carcinoma/patologia , Carcinoma/terapia , Mastectomia Segmentar , Adulto , Idoso , Idoso de 80 Anos ou mais , Axila/patologia , Neoplasias da Mama/mortalidade , Neoplasias da Mama/radioterapia , Neoplasias da Mama/cirurgia , Carcinoma/mortalidade , Carcinoma/radioterapia , Carcinoma/cirurgia , Quimioterapia Adjuvante , Feminino , Seguimentos , Hematoma/etiologia , Humanos , Excisão de Linfonodo/efeitos adversos , Linfedema/etiologia , Mastectomia Segmentar/métodos , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Dosagem Radioterapêutica , Radioterapia Adjuvante , Estudos Retrospectivos , Seroma/etiologia , Análise de Sobrevida
9.
Eur J Cancer Care (Engl) ; 17(3): 270-7, 2008 May.
Artigo em Inglês | MEDLINE | ID: mdl-18419630

RESUMO

Fluconazole is recommended in the prophylaxis of oropharyngeal candidiasis (OPC) in patients undergoing radiotherapy for head-neck tumours; however, the actual effectiveness of fluconazole in this setting remains unclear. Adult patients with cervico-cephalic carcinoma submitted to radical or adjuvant radiotherapy were randomized to 100 mg fluconazole (n = 138) or matched placebo (n = 132) oral suspension once daily from the sixth session of radiotherapy up to the end of treatment. The final analysis of the investigation showed a higher rate of the OPC outbreak-free survival in the fluconazole compared with placebo (P = 0.008 in the log-rank test). The mean time (95% CI) to OPC outbreak was 56 (53-59) days in the fluconazole group and 47 (43-51) days with placebo. The mean duration of radiotherapy was 43.5 and 39.9 days, respectively in the two groups (P = 0.027). Adverse effects were reported in 70.3% of patients in the fluconazole group and in 67.4% with placebo. The results showed prophylaxis with fluconazole given in irradiated patients with head-neck tumours significantly reduces the rate and the time to development of OPC compared with placebo.


Assuntos
Antifúngicos/uso terapêutico , Candidíase Bucal/prevenção & controle , Fluconazol/uso terapêutico , Neoplasias de Cabeça e Pescoço/radioterapia , Infecções Oportunistas/prevenção & controle , Doenças Faríngeas/prevenção & controle , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Candidíase Bucal/complicações , Método Duplo-Cego , Feminino , Neoplasias de Cabeça e Pescoço/complicações , Humanos , Masculino , Pessoa de Meia-Idade , Infecções Oportunistas/complicações , Resultado do Tratamento
10.
J Exp Clin Cancer Res ; 26(4): 543-52, 2007 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-18365551

RESUMO

The purpose of this work is to introduce a new treatment approach and technique for partial breast irradiation in only one session to patients in prone position by using a dedicated positioning device. The patients were treated on a home-made treatment table top that allows the breast to hang down. A particular immobilization system was introduced in order to assure the reproducibility of patient positioning between the CT acquisition session and the treatment session. The clinical target volume (CTV) was outlined according to surgical clips position and/or tumor location on preoperative mammography. Because of negligible movement due to respiration, only an additional margin of 3 mm was added to obtain the planning target volume (PTV). Based on radiobiological calculations, a dose of 21 Gy was prescribed to PTV. The tumor bed was treated with 3D-CRT technique by using 5 fields and rotating the table while the gantry was approximately 90 or 270 degrees. Thirty patients were enrolled for this study chosen in conformity to an approved clinical protocol. The average percentage of PTV volume enclosed in the 90% and 95% of prescribed dose were 99.9 and 98.6% respectively, while only 3.4% of PTV volume received more than 105% of prescribed dose. Dose to 3% of skin volume was, on average, 15.2 Gy. In 97% of patients, less than 50% of the ipsilateral breast received a dose greater than half the prescribed dose. Mean doses to lungs, heart and contralateral breast were negligible. With a median follow-up of 9 months, no important early toxicity was observed both for skin and breast tissue. The treatment of breast tumor bed in prone position in only one session by using the 3D-CRT is technically feasible and seems to be a promising alternative to other accelerated partial breast irradiation techniques.


Assuntos
Neoplasias da Mama/radioterapia , Mama/efeitos da radiação , Carcinoma Ductal de Mama/radioterapia , Planejamento da Radioterapia Assistida por Computador/métodos , Mama/patologia , Neoplasias da Mama/patologia , Carcinoma Ductal de Mama/patologia , Feminino , Humanos , Mastectomia Segmentar , Pessoa de Meia-Idade , Recidiva Local de Neoplasia , Decúbito Ventral , Dosagem Radioterapêutica , Planejamento da Radioterapia Assistida por Computador/instrumentação , Radioterapia Conformacional
11.
G Ital Med Lav Ergon ; 29(3 Suppl): 411-3, 2007.
Artigo em Italiano | MEDLINE | ID: mdl-18409750

RESUMO

The evolution of the modern anaesthesiologic technique aimed to detect more manageable and less toxic aesthetic gas, but adequately efficacy. This study considered the environmental and biological evaluation of the Careggi Hospital in Florence between 1991 and 2005. The pollution threshold of each aesthetic gas used (Nitrous oxide, Isoflurane and Sevoflurane) is reduced as time passed. The higher values about the pollution threshold have been found in the ophthalmology and in the otolaryngology operating room. We observed clinical and biological data of 74 health care workers (HCW). The anaesthetists and assistants were the more exposition. We didn't found any correlation between the exposure at gas and the clinical, and biological data. Some neurological and nonspecific symptoms (like head-ache and reduction of attention threshold) appear from the clinical informations; these symptoms suggest a possible effects on the HCW' health also for low pollution threshold.


Assuntos
Anestésicos Inalatórios/análise , Monitoramento Ambiental , Exposição Ocupacional/análise , Salas Cirúrgicas , Adulto , Hospitais , Humanos , Fatores de Tempo
12.
Cutan Ocul Toxicol ; 25(3): 165-71, 2006.
Artigo em Inglês | MEDLINE | ID: mdl-16980242

RESUMO

This study was designed to assess the efficacy and tolerability of MAS065D (Xclair) compared to a vehicle control in the management of radiation dermatitis in patients receiving radiotherapy for breast cancer. Twenty patients were randomized blindly to use the two study substances, three times daily, on separate sections of irradiated skin throughout the duration of radiotherapy and for two weeks afterwards. Patients were monitored before therapy, weekly during therapy, and for 2 weeks after radiotherapy was completed. Skin appearance according to National Cancer Institute (NCI) toxicity criteria, erythema rating, transepidermal water loss (TEWL), skin hydration, patients' view of itch, pain, acceptance, and view of each cream and adverse events, were monitored; at the final visit patients and investigators expressed their preference for one of the creams. MAS065D showed statistically significant superiority in the outcomes of NCI grading for radiation dermatitis and erythema. Patients' and investigators' preferences for one of the study substances were statistically in favor of MAS065D. Very few patients recorded nonzero itch and pain scales, so no significant differences emerged between the two groups. It was concluded that MAS065D can provide an effective option for managing radiation dermatitis although further studies are needed to assess its effect on pain and itch.


Assuntos
Neoplasias da Mama/radioterapia , Fármacos Dermatológicos/uso terapêutico , Ácido Glicirretínico/uso terapêutico , Ácido Hialurônico/uso terapêutico , Radiodermite/tratamento farmacológico , Radioterapia/efeitos adversos , Neoplasias da Mama/etiologia , Método Duplo-Cego , Combinação de Medicamentos , Feminino , Ácido Glicirretínico/química , Humanos , Ácido Hialurônico/química , Pessoa de Meia-Idade , Radiodermite/patologia , Pele/efeitos dos fármacos , Pele/patologia , Pele/efeitos da radiação , Resultado do Tratamento
14.
Int J Immunopathol Pharmacol ; 19(4 Suppl): 73-7, 2006.
Artigo em Inglês | MEDLINE | ID: mdl-17291411

RESUMO

The aim of this study is the evaluation of exposure to airborne, high-level disinfectants to efficiently organize prevention of the risks due to the manipulation of these substances in the endoscopic units in medical facilities. In field and personal samples in the breathing zone of the workers were taken in 27 endoscopic units in a hospital during the replacement of high-level disinfectants in basins, tubes and lavaendoscopes. After a campaign of environmental monitoring of glutaraldehyde in nineteen endoscopic units (176 employees) of the hospital and considering the entity of glutaraldehyde problem, two substitutes, peracetic acid and electrolyzed acid water, have recently been introduced. The level of glutaraldehyde was higher than the TLV-Ceiling in 13 out of 19 working units, while the value of peracetic acid resulted higher than TLV-TWA in 1 out of 15. EAW has recently been used in two units and the chlorine environmental concentrations resulted lower than the sensibility limit of the method (<75 microg/m3). The results obtained during this study of measurements allowed to identify those operations which have the highest degree of risk for employees; this serves for taking suitable measures for prevention and individual protection as well as for evaluating current practices and decisional processes in the hospital.


Assuntos
Desinfetantes/análise , Endoscopia , Exposição Ocupacional , Glutaral/análise , Humanos , Ácido Peracético/análise
15.
Biomarkers ; 10(4): 238-51, 2005.
Artigo em Inglês | MEDLINE | ID: mdl-16240503

RESUMO

S-phenylmercapturic acid (PMA) is a specific urinary biomarker of benzene at exposure levels lower than 1 ppm. However, measuring PMA in urine is an expensive task by either GC or HPLC due to the necessity of extensive sample pretreatment. In the present study, a commercial chemiluminescence enzyme-linked immunosorbent assay (ELISA) test for PMA and GC-MS were used for screening urine samples of 60 workers employed in petrochemical settings. The ELISA results were evaluated by comparison with the GC-MS. Overall, the ELISA test proved sensitive (limit of detection=0.1 microg l(-1)), rapid, robust and reliable, affording results in good agreement with the GC-MS (54% of measurements) and no false-negatives. On the other hand, 46% of the ELISA assays were assigned as false-positives (arbitrarily established when ELISA >5 microg l(-1), GC-MS <5 microg l(-1) and a correlation coefficient of 0.687 was calculated between the two methods. It appears that urinary PMA routine biomonitoring on large numbers of samples is carried out in a cost-effective and rapid approach by preliminary screening with the ELISA assay followed by GC-MS confirmation of concentrations exceeding the biological exposure index for PMA.


Assuntos
Acetilcisteína/análogos & derivados , Benzeno/toxicidade , Biomarcadores/urina , Exposição Ocupacional/análise , Acetilcisteína/urina , Calibragem , Ensaio de Imunoadsorção Enzimática/métodos , Reações Falso-Negativas , Reações Falso-Positivas , Cromatografia Gasosa-Espectrometria de Massas/métodos , Humanos , Kit de Reagentes para Diagnóstico , Reprodutibilidade dos Testes , Sensibilidade e Especificidade
16.
Int J Immunopathol Pharmacol ; 17(2 Suppl): 91-6, 2004.
Artigo em Inglês | MEDLINE | ID: mdl-15345198

RESUMO

Respiratory diseases are frequent in tunnel construction workers. A group of 144 subjects randomly selected from the population of 2516 workers engaged in the construction of the railway tunnel under the Appennine Mountains, from Bologna to Firenze was investigated. A group of 69 males comparable for age, living area and habits was studied as a control group. Assessment of air pollutants (NO, NO2, SO2, total dust, silica %) was carried out by means of fixed monitoring stations as well as personal monitors. All the subjects included in the study were examined with a standardised protocol which included physical examination, lung function tests (before and after shift work) and a questionnaire to college respiratory symptoms. Low concentrations of environmental pollutants were evidenced. Significantly lower values of FEV1 and PEF were determined in the worker group pared to controls. A significant decrease in respiratory parameters was shown after shift work. Variables capable of influencing the decrease in parameters include smoking habits, work activity, presence of cough and expectoration, period of the year (spirometries resulted worse in the winter time). Significantly lower values of FEV1 and PEF were evidenced in the workers compared to controls. In spite of the present low work environmental exposure conditions, some physiologic parameters appear altered in tunnel construction workers. This may depend on a variety of noxious agents present in the working environment.


Assuntos
Poeira , Doenças Profissionais/fisiopatologia , Hipersensibilidade Respiratória/fisiopatologia , Emissões de Veículos/efeitos adversos , Adulto , Monitoramento Ambiental , Monitoramento Epidemiológico , Humanos , Itália/epidemiologia , Masculino , Doenças Profissionais/epidemiologia , Hipersensibilidade Respiratória/epidemiologia , Fatores de Risco
17.
Histopathology ; 44(3): 251-6, 2004 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-14987229

RESUMO

AIM: Bronchioloalveolar carcinomas (BACs) are rare primitive lung adenocarcinomas growing along the alveolar septum without stromal, vascular or pleural invasion. We report an immunohistochemical study of their vascular microenvironment. METHODS AND RESULTS: In three mucinous BACs (M-BAC) and three non-mucinous BACs (NM-BAC) we examined the following parameters in comparison with the normal lung: (i) constituents of the alveolar extracellular matrix; (ii) qualitative and quantitative changes of alveolar capillaries; and (iii) expression of vascular endothelial growth factor (VEGF) by tumour cells. In M-BAC, the alveolar matrix was unchanged compared with the normal parenchyma. Capillaries expressed normal alveolar endothelial markers and their average surface was calculated, as in normal lung, as 8%. VEGF was negative in tumour cells. In NM-BAC, the alveolar wall was thickened by deposits of fibronectin and type III collagen containing myofibroblasts and the basement membrane was disrupted. Capillaries did not retain alveolar endothelial markers and their surface was calculated as 19%. Tumour cells expressed high levels of VEGF. CONCLUSIONS: In contrast to NM-BAC, M-BAC do not modify the alveolar structure and seem to exploit the normal alveolar vascular bed to grow, without inducing neoangiogenesis. A better understanding of the mechanisms of growth of lung cancers may have implications for future anti-angiogenic therapeutic strategies.


Assuntos
Adenocarcinoma Bronquioloalveolar/patologia , Adenocarcinoma Mucinoso/patologia , Matriz Extracelular/metabolismo , Neoplasias Pulmonares/patologia , Adenocarcinoma Bronquioloalveolar/irrigação sanguínea , Adenocarcinoma Bronquioloalveolar/metabolismo , Adenocarcinoma Mucinoso/irrigação sanguínea , Adenocarcinoma Mucinoso/metabolismo , Humanos , Imuno-Histoquímica , Neoplasias Pulmonares/irrigação sanguínea , Neoplasias Pulmonares/metabolismo , Neovascularização Patológica , Fator A de Crescimento do Endotélio Vascular/biossíntese
18.
J Occup Environ Med ; 43(10): 872-81, 2001 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-11665456

RESUMO

Mineralogical analysis of bronchoalveolar lavage fluid (BALF) by electron microscopy can represent the most suitable method for assessing asbestos exposure. However, it has been claimed that no standardized or systematic approach to the subject of mineralogical analysis exists. This study aimed to evaluate BALF mineralogical analysis by transmission electron microscopy as biomarker of asbestos fiber load. BALF was examined in 108 exposed workers and 57 patients who underwent diagnostic fiberoptic bronchoscopy for various clinical purposes. Asbestos bodies in BALF were counted with a phase-contrast microscope. Fibers were counted and analyzed by transmission electron microscopy, which showed a significant difference between the two populations and positive results for all exposed subjects. Only 82.2% of the exposed population tested positive for asbestos bodies. Subjects with long-term exposure had higher concentrations of fibers than did those with more recent exposure, probably because of the higher workplace exposure levels in the past. The results of the study confirm that fiber concentration in BALF can be considered as a reliable biomarker of past asbestos exposure, even many years after the end of exposure.


Assuntos
Amianto/análise , Líquido da Lavagem Broncoalveolar/química , Adulto , Idoso , Idoso de 80 Anos ou mais , Broncoscopia , Estudos de Casos e Controles , Feminino , Humanos , Itália , Masculino , Microscopia Eletrônica , Pessoa de Meia-Idade , Exposição Ocupacional , Estatísticas não Paramétricas
19.
Sci Total Environ ; 270(1-3): 135-9, 2001 Apr 10.
Artigo em Inglês | MEDLINE | ID: mdl-11327386

RESUMO

Silica has been reported to directly stimulate cellular proliferation of human lung fibroblasts, and silica-treated macrophage supernatants induce fibroblast proliferation and some of their biosynthetic activities. Alveolar macrophages produce increased amount of tumour necrosis factor alpha (TNF-alpha) and transforming growth factor beta (TGF-beta). Lung fibroblasts are producers of interleukin-6 (IL-6). We investigated the capacity of lung fibroblasts obtained from normal and silicosis subjects to elaborate IL-6 in response to TNF-alpha and to TGF-beta. Our data show that TNF-alpha and TGF-beta are able to stimulate the proliferation of human lung fibroblasts in culture, to increase the collagen production of the cells and are both able to increase IL-6 production by lung fibroblasts of patients with silicosis. We hypothesise that silica is able to stimulate lung fibroblast both directly, increasing the cell proliferation, and indirectly stimulating the release of factors (as TNF-alpha and TGF-beta) from activated alveolar macrophages, that are able to increase proliferative and biosynthetic activities of fibroblast.


Assuntos
Fibroblastos/efeitos dos fármacos , Dióxido de Silício/farmacologia , Divisão Celular/efeitos dos fármacos , Células Cultivadas , Fibroblastos/metabolismo , Humanos , Interleucina-6/metabolismo , Pulmão/patologia , Linfotoxina-alfa/farmacologia , Valores de Referência , Silicose/patologia , Fator de Necrose Tumoral alfa/farmacologia
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