Objective To partially purify the angiogenesis factor of human osteosarcoma(HuOs) and study its biological features. Methods The active peptide with a molecular weight of 8000-10000 Da in the conditioned medium obtain...Objective To partially purify the angiogenesis factor of human osteosarcoma(HuOs) and study its biological features. Methods The active peptide with a molecular weight of 8000-10000 Da in the conditioned medium obtained from the cultivation of Hu-Os cells(osteoblastic osteosarcoma) was partially purified by ultrafiltration, chromatography and dialysis.The angiogenic effects of the fractions were assessed by proliferation assay of human umbilical vein and pig thoracic aorta endothelial cells. Results The chromatography fractions 4-6 could significantly promote the proliferation of the endothelial cells.Conclusion The HuOs cells could synthesize and secrete angiogenesis factor with a molecular weight of 8000-10000 Da.展开更多
EBV-DP(Epstein-Barr virus specified DNA palymerase)是EB病毒早期抗原成分之一,也是EB病毒复制的关键酶,研究该酶不仅有助于鼻咽癌的早期诊断,而且有可能为研究EB病毒与鼻咽癌的关系提供新的线索。本文就该酶的来源、化学性质、提取...EBV-DP(Epstein-Barr virus specified DNA palymerase)是EB病毒早期抗原成分之一,也是EB病毒复制的关键酶,研究该酶不仅有助于鼻咽癌的早期诊断,而且有可能为研究EB病毒与鼻咽癌的关系提供新的线索。本文就该酶的来源、化学性质、提取、纯化、活性测定以及临床应用等问题作简要介绍。展开更多
文摘Objective To partially purify the angiogenesis factor of human osteosarcoma(HuOs) and study its biological features. Methods The active peptide with a molecular weight of 8000-10000 Da in the conditioned medium obtained from the cultivation of Hu-Os cells(osteoblastic osteosarcoma) was partially purified by ultrafiltration, chromatography and dialysis.The angiogenic effects of the fractions were assessed by proliferation assay of human umbilical vein and pig thoracic aorta endothelial cells. Results The chromatography fractions 4-6 could significantly promote the proliferation of the endothelial cells.Conclusion The HuOs cells could synthesize and secrete angiogenesis factor with a molecular weight of 8000-10000 Da.
文摘EBV-DP(Epstein-Barr virus specified DNA palymerase)是EB病毒早期抗原成分之一,也是EB病毒复制的关键酶,研究该酶不仅有助于鼻咽癌的早期诊断,而且有可能为研究EB病毒与鼻咽癌的关系提供新的线索。本文就该酶的来源、化学性质、提取、纯化、活性测定以及临床应用等问题作简要介绍。