WNT5A Regulated by miR154-5p is Associated with Angiopoiesis and Invasion of Placental Site Trophoblastic Tumor (PSTT)

Placental site trophoblastic tumor(PSTT),a rare gestational trophoblastic neoplasm(GTN),exhibits slow growth,late-onset metastasis,and chemotherapy insensitivity[1,2].The invasive capacity of trophoblasts induces angiogenesis in PSTT,yet the specific mechanism remains unclear[3].PSTT is typically resistant to chemotherapy and hysterectomy stands as the primary therapeutic choice for patients with an overall cure rate of approximately 75%-80%[4,5].Therefore,investigating the precise emergence and progression of PSTT is crucial,aiming to identify novel targets for diagnosis and therapy.

超滤法分离刺五加果多糖及其抗氧化活性的研究

目的:通过超滤法对刺五加果多糖的分子量分级,筛选出抗氧化活性较好的分子量组分。方法:采用热水提取醇沉淀法提取刺五加果多糖,三氯乙酸法脱除蛋白质,不同截留分子量的超滤膜对刺五加果多糖进行分离,各级多糖通过测定DPPH和超氧自由基O 2-的清除率来进行筛选其抗氧化活性组分。结果:刺五加果多糖经三氯乙酸除蛋白,超滤法分离后,分子量不同的各组分的多糖含量均相应的增大,50~10kDa组分含量最高为88.15%。通过测定DPPH和超氧自由基O 2-的清除率发现,分子量不同的各组分刺五加果多糖均具有不同程度的抗氧化活性,其中抗氧化活性最好的是分子量50~10kDa组分。结论:通过超滤法可以将刺五加果多糖有效的分离和纯化,并通过体外抗氧化实验筛选出最好的活性组分,达到了分离和筛选的目的。