RESUMEN
BACKGROUND: Hepatocellular carcinoma (HCC) remains one of the most common cancers worldwide and tends to be detected at an advanced stage. More effective biomarkers for HCC screening and prognosis assessment are needed and the mechanisms of HCC require further exploration. The role of MAOA in HCC has not been intensively investigated. METHODS: In-house tissue microarrays, genechips, and RNAsequencing datasets were integrated to explore the expression status and the clinical value of MAOA in HCC. Immunohistochemical staining was utilized to determine MAOA protein expression. Intersection genes of MAOA related co-expressed genes and differentially expressed genes were obtained to perform functional enrichment analyses. In vivo experiment was conducted to study the impact of traditional Chinese medicine nitidine chloride (NC) on MAOA in HCC. RESULTS: MAOA was downregulated and possessed an excellent discriminatory capability in HCC patients. Decreased MAOA correlated with poor prognosis in HCC patients. Downregulated MAOA protein was relevant to an advanced TNM stage in HCC patients. Co-expressed genes that positively related to MAOA were clustered in chemical carcinogenesis, where CYP2E1 was identified as the hub gene. In vivo experiment showed that nitidine chloride significantly upregulated MAOA in a nude mouse HCC model. CONCLUSIONS: A decreased MAOA level is not only correlated with aggressive behaviors in males but also serves as a promising biomarker for the diagnosis and prognosis of HCC patients. Moreover, MAOA may play a role in AFB1 toxic transformation through its synergistic action with co-expressed genes, especially CYP3A4. MAOA also serves as a potential therapy target of NC in HCC patients.
Asunto(s)
Biomarcadores de Tumor/análisis , Carcinoma Hepatocelular/enzimología , Neoplasias Hepáticas/enzimología , Monoaminooxidasa/análisis , Animales , Antineoplásicos Fitogénicos/farmacología , Benzofenantridinas/farmacología , Biomarcadores de Tumor/genética , Carcinoma Hepatocelular/tratamiento farmacológico , Carcinoma Hepatocelular/genética , Carcinoma Hepatocelular/patología , Línea Celular Tumoral , Citocromo P-450 CYP2E1/genética , Citocromo P-450 CYP2E1/metabolismo , Citocromo P-450 CYP3A/genética , Citocromo P-450 CYP3A/metabolismo , Bases de Datos Genéticas , Regulación hacia Abajo , Regulación Enzimológica de la Expresión Génica , Regulación Neoplásica de la Expresión Génica , Redes Reguladoras de Genes , Humanos , Inmunohistoquímica , Neoplasias Hepáticas/tratamiento farmacológico , Neoplasias Hepáticas/genética , Neoplasias Hepáticas/patología , Ratones Desnudos , Monoaminooxidasa/genética , Estadificación de Neoplasias , Análisis de Secuencia por Matrices de Oligonucleótidos , Valor Predictivo de las Pruebas , Mapas de Interacción de Proteínas , RNA-Seq , Análisis de Matrices Tisulares , Ensayos Antitumor por Modelo de XenoinjertoRESUMEN
In order to remove low concentration of phosphorus in wastewater and realize resource utilization of reed, reed biochar(RB) was prepared using reed and then modified by ferric chloride, and the adsorption behavior of low concentration phosphorus was investigated. The results showed that the iron content of modified reed biochar(MRB) was 11.98 mg·g-1, which was 44.7 times that of RB; pHpzc of the MRB was 7.49, and the adsorption effect was the best when the solution pH was 7.0; at the initial concentration of 4.0 mg·L-1 and temperature of 298K, the adsorption capacity of MRB was 0.658 mg·g-1, which was 34.6 times that of RB. The adsorption isotherms at different temperatures were well fitted to Langmiur equation, which indicated the adsorption was monolayer adsorption, and increasing temperature was favorable for adsorption. ΔGθ<0, ΔHθ>0 and ΔSθ>0 indicated that the adsorption was a spontaneous, entropy increasing and endothermic process. The kinetic experimental data of the adsorption fitted well to the pseudo-second-order equation, the initial adsorption rate increased with the increasing initial concentration of solution, and the adsorption was mainly controlled by intraparticle diffusion. The research will provide basic data for application of MRB in deep removal of low concentration phosphorus from sewage treatment plant and water body.