Study Progress on Biopreparation and Antitumor Mechanism of Ginsenoside CK / 世界科学技术-中医药现代化

Ginsenoside Compound K(CK)is a kind of protopanaxadiol ginsenosides,which exerts antitumor effects on various cancers,such as lung cancer,liver cancer and breast cancer.Pharmacological studies have proved that CK induces tumor cell cycle arrest and apoptosis,as well as regulates tumor cell autophagy and inhibits tumor metastasis by regulating multiple signaling pathways(AMPK/mTOR and PI3K/Akt et cetera).However,as an intestinal metabolite of natural protopanaxadiol ginsenosides,CK cannot be directly extracted from the ginseng plant.Therefore,biotransformation from natural ginsenosides such as ginsenoside Rb1 or biosynthesis are utilized to obtain CK.Biotransformation of CK uses enzymes or microorganisms to transform different ginsenosides or their structural analogs into CK;biosynthesis of CK cultures cell factories and biosynthetic enzymes to synthesize glucose and other simple compounds into CK.In this review,we systematically summarized the research progress in biopreparation and antitumor mechanism of CK in recent years,with the aim of providing evidence for the future development of CK as a clinical anti-tumor candidate drug or an adjunctive drug.

Antitumor effect of umbilical cord mesenchymal stem cells:research advances / 国际药学研究杂志

Umbilical cord mesenchymal stem cells(UC-MSC)are a kind of stem cell group with high self-renewal ability and multi-directional differentiation potential. In recent years,studies have shown that UC-MSC is far more advan- tageous than the stem cells from other sources in terms of acquisition,storage and transplantation. UC-MSC also possesses the characteristics of secreting specific cytokines,playing an immunomodulatory role,or delivering”drugs”to the special tumor sites. Therefore,UC-MSC has become a promising tumor-targeting tool. This article reviews recent advances in the research on the antitumor mechanism and safety of UC-MSC.

Effect of Haimidin on lipid fluidity in erythrocyte membrane and DNA content in normal and H_(22) tumor bearing mice / 中草药

Object To study the effect of Haimidin(HMD) on erythrocyte membrane of H 22 ascites tumor bearing mice and DNA synthesis in human gastric tumor cell Methods By fluorescence spectrophotometry and laser scanning confocal microscopy Results HMD can lower erythrocyte microviscosity and elevate membrane lipid fluidity of H 22 ascite tumor bearing mice It also reduced DNA fluorescent intensity and DNA content of gastric tumor cells in vitro Conclusion HMD can improve blood circulation of tumor bearing mice, enhance immune adherence of erythrocyte on tumor cells and displays its antitumor activity by interferring DNA synthesis of tumor cells

Effect of sea-algae polysaccharide to tumor cell membrane fluidity / 中草药

Object To study the antitumor mechanism of sea algae polysaccharide (SP). Methods The membrane fluidity of the S 180 and H 22 mice was observed by DPH fluorescent probe method. Results SP could increase the membrance fluidity of the S 180 and decrease that of the H 22 . Conclusion SP showed the antitumor effect through returning the tumor cell membrance fluidity to the normal one.