17β-Estradiol induces changes in cytokine levels in head kidney and blood of juvenile sea bass (Dicentrarchus labrax,L., 1758)

The cytokine network is involved in the immune system communication. As estrogens influence the cytokine expression in mammals, this study investigated the impact of exogenous estrogenic pollutants on selected cytokines in Dicentrarchus labrax. The gene expression of Interleukin 6, Tumour Necrosis Factor α, Transforming Growth Factor β1 and Interleukin 1β was assessed and accomplished with protein measurements in the blood for the last two. Impacts through 17β-estradiol mainly occurred at the beginning of organ regionalisation, thus falling together with a developmentally induced increase of Interleukin 1β and Tumour Necrosis Factor α gene expression in 102 dph fish. 17β-estradiol depressed this modification after 35 days of exposure and the cytokine gene expression tended to be generally down-regulated independently of the 17β-estradiol concentrations after 56 days of exposure. This impact was confirmed at the protein level, showing that 17β-estradiol affects the fine control of the cytokine network in sea bass.     

山东海区大型海藻抗肿瘤及免疫活性

对山东海区大型海藻进行系统采集，采用SRB法测定了40种海藻甲醇提取物对A-549人肺腺癌细胞生长抑制率，MTT法测定了对HL-60人白血病细胞生长抑制率；并且测定了样品对T、B淋巴细胞的免疫活性和细胞毒性。结果表明：异枝凹项藻、细枝软骨藻、鸭毛藻、绳藻、叉开网翼藻具有较好的抗A-549肿瘤细胞活性，鸭毛藻、异管藻和网地藻具有较好的抗HL-60肿瘤细胞活性；金膜藻、萱藻、绳藻、小粘膜藻和酸藻具有较好的免疫生物活性。