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1.
Chemosphere ; 254: 126882, 2020 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-32957289

RESUMO

Methamphetamine, mainly consumed as an illicit drug, is a potent addictive psychostimulant that has been detected in surface water at concentrations ranging from nanograms to micrograms per litre, especially in Middle and East Europe. The aim of this study was to expose brown trout (Salmo trutta fario) to environmental (1 µg L-1) and higher (50 µg L-1) concentrations of methamphetamine for 35 days with a four-day depuration phase to assess the possible negative effects on fish health. Degenerative liver and heart alterations, similar to those described in mammals, were observed at both concentrations, although at different intensities. Apoptotic changes in hepatocytes, revealed by activated caspase-3, were found in exposed fish. The parent compound and a metabolite (amphetamine) were detected in fish tissues in both concentration groups, in the order of kidney > liver > brain > muscle > plasma. Bioconcentration factors ranged from 0.13 to 80. A therapeutic plasma concentration was reached for both compounds in the high-concentration treatment. This study indicates that chronic environmental concentrations of methamphetamine can lead to health issues in aquatic organisms.


Assuntos
Metanfetamina/toxicidade , Truta/fisiologia , Poluentes Químicos da Água/toxicidade , Animais , Europa (Continente) , Rim/patologia , Fígado/metabolismo , Truta/metabolismo
2.
J Immunother Cancer ; 6(1): 139, 2018 12 04.
Artigo em Inglês | MEDLINE | ID: mdl-30526667

RESUMO

A high density of tumor-infiltrating CD8+ T cells and CD20+ B cells correlates with prolonged survival in patients with a wide variety of human cancers, including high-grade serous ovarian carcinoma (HGSC). However, the potential impact of mature dendritic cells (DCs) in shaping the immune contexture of HGSC, their role in the establishment of T cell-dependent antitumor immunity, and their potential prognostic value for HGSC patients remain unclear. We harnessed immunohistochemical tests and biomolecular analyses to demonstrate that a high density of tumor-infiltrating DC-LAMP+ DCs is robustly associated with an immune contexture characterized by TH1 polarization and cytotoxic activity. We showed that both mature DCs and CD20+ B cells play a critical role in the generation of a clinically-favorable cytotoxic immune response in HGSC microenvironment. In line with this notion, robust tumor infiltration by both DC-LAMP+ DCs and CD20+ B cells was associated with most favorable overall survival in two independent cohorts of chemotherapy-naïve HGSC patients. Our findings suggest that the presence of mature, DC-LAMP+ DCs in the tumor microenvironment may represent a novel, powerful prognostic biomarker for HGSC patients that reflects the activation of clinically-relevant anticancer immunity.


Assuntos
Carcinoma/imunologia , Carcinoma/patologia , Células Dendríticas/imunologia , Células Dendríticas/patologia , Neoplasias Ovarianas/imunologia , Neoplasias Ovarianas/patologia , Microambiente Tumoral/imunologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Biomarcadores , Carcinoma/mortalidade , Células Dendríticas/metabolismo , Feminino , Humanos , Imuno-Histoquímica , Imunofenotipagem , Estimativa de Kaplan-Meier , Linfócitos do Interstício Tumoral/imunologia , Linfócitos do Interstício Tumoral/metabolismo , Linfócitos do Interstício Tumoral/patologia , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Neoplasias Ovarianas/mortalidade , Neoplasias Ovarianas/terapia , Prognóstico , Modelos de Riscos Proporcionais , Subpopulações de Linfócitos T/imunologia , Subpopulações de Linfócitos T/metabolismo , Subpopulações de Linfócitos T/patologia
3.
Int J Cancer ; 133(8): 1832-9, 2013 Oct 15.
Artigo em Inglês | MEDLINE | ID: mdl-23564321

RESUMO

The purpose of this study was to determine whether changes in human papillomavirus (HPV) DNA prevalence in oral rinses and/or HPV-specific antibody levels in the sera of patients with oral/oropharyngeal cancer have prognostic significance. One hundred and forty-two patients with oral/oropharyngeal tumors were enrolled. The presence of HPV DNA was assayed in tumor tissue and oral rinses and HPV-specific antibodies were assessed in the sera. Oral rinses were collected before treatment and one year after the treatment. Sera were drawn before treatment, one month, and one year after the end of the treatment. Altogether, 59.2% of tumors were HPV positive. The presence of HPV DNA in the tumors correlated with HPV DNA positivity in oral rinses and with HPV-specific antibodies in the sera. Out of 66 patients with HPV-positive oral rinses at enrolment, 84.8% became negative at one-year follow-up, while most patients remained seropositive for HPV-specific antigens. However, the mean titers of HPV16 E6 and/or E7 antibodies at follow-up were significantly lower. Of 16 patients with recurrences at follow-up (alive on second sampling), six were positive at enrolment for HPV16 E6 and/or E7 antibodies. In five of these, no decrease in antibody levels was observed. Titers of antibodies specific for HPV16 capsid antigens did not change during the follow-up. Our data suggest that the detection of antibodies specific for the HPV 16 E6 and E7 oncoproteins may serve not only as a marker of HPV etiology, but also as a marker of recurrence and a prognostic indicator in patients with HPV-positive tumors.


Assuntos
Anticorpos Antivirais/sangue , DNA Viral/isolamento & purificação , Neoplasias de Cabeça e Pescoço/mortalidade , Neoplasias de Cabeça e Pescoço/virologia , Infecções por Papillomavirus , Biomarcadores Tumorais , Proteínas do Capsídeo/imunologia , Feminino , Papillomavirus Humano 16/imunologia , Humanos , Masculino , Pessoa de Meia-Idade , Boca/virologia , Proteínas Oncogênicas Virais/imunologia , Proteínas E7 de Papillomavirus/imunologia , Infecções por Papillomavirus/sangue , Infecções por Papillomavirus/genética , Infecções por Papillomavirus/imunologia , Prognóstico , Proteínas Repressoras/imunologia , Taxa de Sobrevida
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