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1.
Chemosphere ; 198: 266-273, 2018 May.
Artigo em Inglês | MEDLINE | ID: mdl-29421738

RESUMO

Previous studies have confirmed that house dust is one of the main sources of polybrominated diphenyl ethers (PBDEs) exposure, and also indicated that PBDEs might affect human semen quality. The aim of this study was to explore the association between PBDEs concentration in house dust and the semen quality of male resident. Results showed that the semen qualities of the residents living around the e-waste dismantling workshops for a long time (3-17years) at the e-waste areas in South China significantly decreased, and the DNA damage of sperms were aggravated. The adjusted correlation analysed by multiple linear regression model showed that the sperm concentration and count both had negative correlation with BDE47 level in semen (ß = -0.295, 95%CI: -0.553∼-0.036; ß = -0.400, 95%CI: -0.708∼-0.092, respectively). In addition, the sperm progressive motility [(A+B)%] and sperm viability both had negative correlation with BDE100 level in dust (ß = -0.360, 95%CI: -0.680∼-0.040; ß = -0.114, 95% CI: -0.203∼-0.025, respectively). And there were significant linear positive correlation between PBDE congener (e.g. BDE28, 47, 153) concentrations in dust and in paired semen samples (rs = 0.367-0.547, p < 0.05). This study suggested that exposure to PBDEs from house dust might have adverse effects on human semen quality. But the results need to be confirmed in further studies with a large-scale sampling, and find out more direct and convincing evidence.


Assuntos
Poluição do Ar em Ambientes Fechados/análise , Poeira/análise , Resíduo Eletrônico/análise , Exposição Ambiental/análise , Éteres Difenil Halogenados/análise , Espermatozoides/efeitos dos fármacos , Adulto , Poluição do Ar em Ambientes Fechados/efeitos adversos , China , Dano ao DNA , Exposição Ambiental/efeitos adversos , Éteres Difenil Halogenados/toxicidade , Humanos , Masculino , Projetos Piloto , Análise do Sêmen , Espermatozoides/química , Inquéritos e Questionários
2.
PLoS One ; 11(12): e0168085, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-28005970

RESUMO

AIMS: The mammalian target of rapamycin (mTOR) and phosphorylated mTOR (p-mTOR) occurring downstream in the PI3K/Akt/mTOR pathway, are regarded as potential prognostic markers for gastric cancer (GC). However, the prognostic value of mTOR/p-mTOR expression remains controversial. In this study, we determined the expression of mTOR, p-mTOR, p70S6k, and p-p70S6K in GC, and investigated the correlation between their overexpression, clinicopathological parameters, and overall survival (OS). METHODS: The expression of mTOR, p-mTOR, p70S6k, and p-p70S6K was examined in 120 GC patients by immunohistochemistry (IHC). The association of protein expression with clinicopathological features and OS was explored. The p-mTOR expression was detected in normal, adjacent, and GC tissues using Western blot. Eligible studies retrieved from PubMed, Ovid, Web of Science and Cochrane databases, were reviewed in this meta-analysis. RESULTS: IHC showed that the rates of expression of the signal transduction molecules mTOR, p-mTOR, p70S6k and p-p70S6K in GC were 60.8%, 54.2%, 53.3% and 53.3%, respectively. Overexpression of mTOR and p70S6K showed no significant association with clinical variables. Expression of p-mTOR was significantly associated with differentiation (P < 0.01), depth of invasion (P < 0.01), lymph node metastasis (P = 0.04) and TNM stage (P = 0.02). Expression of p-p70S6K was associated with differentiation (P = 0.006), depth of invasion (P < 0.001), and TNM stage (P = 0.02). In survival analysis, differentiation, depth of invasion, lymph node metastasis and TNM stage were not related to OS (all P > 0.05). Furthermore, p-mTOR and p-p70S6K expression, but not mTOR and p70S6K, were tightly associated with OS of GC patients (P = 0.006 and P < 0.001, respectively). In Western blot, p-mTOR was significantly higher in GC tissues than in normal and adjacent tissues. In the present meta-analysis, mTOR overexpression showed no relationship with any clinicopathological variables. However, p-mTOR was correlated with depth of invasion, and TNM stage (all P < 0.05), and its overexpression was associated with a shorter survival time (P < 0.001). CONCLUSION: The results suggest that p-mTOR is a more valuable prognostic factor than mTOR in GC.


Assuntos
Biomarcadores Tumorais/metabolismo , Neoplasias Gástricas/patologia , Serina-Treonina Quinases TOR/metabolismo , Terapia Combinada , Feminino , Seguimentos , Humanos , Técnicas Imunoenzimáticas , Metástase Linfática , Masculino , Pessoa de Meia-Idade , Invasividade Neoplásica , Estadiamento de Neoplasias , Fosforilação , Prognóstico , Transdução de Sinais , Neoplasias Gástricas/metabolismo , Neoplasias Gástricas/terapia , Taxa de Sobrevida
3.
Fitoterapia ; 101: 218-23, 2015 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-25617784

RESUMO

Two new sesquiterpene lactone dimers, neojaponicone B (1) and inulanolide E (2) along with five known sesquiterpene lactone dimers (3-7, resp.) were isolated from the aerial parts of Inula japonica Thunb. The chemical structures of 1 and 2 were elucidated by detailed spectroscopic analysis. The relative configuration of 2 was confirmed by biomimetic transformation from the known sesquiterpene lactone dimer inulanolide A (3). The cytotoxicities of the isolated sesquiterpene lactone dimers were evaluated against 6T-CEM and Jurkat cell lines. All compounds showed potent cytotoxicities with IC50 value of 2.2-5.9µm.


Assuntos
Antineoplásicos Fitogênicos/química , Inula/química , Lactonas/química , Sesquiterpenos/química , Antineoplásicos Fitogênicos/isolamento & purificação , Linhagem Celular Tumoral , Humanos , Concentração Inibidora 50 , Lactonas/isolamento & purificação , Estrutura Molecular , Componentes Aéreos da Planta/química , Sesquiterpenos/isolamento & purificação
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