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Khan, Muhammad,Maryam, Amara,Mehmood, Tahir,Zhang, Yaofang,Ma, Tonghui Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.16
Multidrug resistance is a principal mechanism by which tumors become resistant to structurally and functionally unrelated anticancer drugs. Resistance to chemotherapy has been correlated with overexpression of p-glycoprotein (p-gp), a member of the ATP-binding cassette (ABC) superfamily of membrane transporters. P-gp mediates resistance to a broad-spectrum of anticancer drugs including doxorubicin, taxol, and vinca alkaloids by actively expelling the drugs from cells. Use of specific inhibitors/blocker of p-gp in combination with clinically important anticancer drugs has emerged as a new paradigm for overcoming multidrug resistance. The aim of this paper is to review p-gp regulation by dietary nutraceuticals and to correlate this dietary nutraceutical induced-modulation of p-gp with activity of anticancer drugs.
Azhar Rasul,Muhammad Khan,Bo Yu,Muhammad Ali,Yang Jing Bo,Hong Yang,Tonghui Ma 대한약학회 2013 Archives of Pharmacal Research Vol.36 No.10
Isoalantolactone, a sesquiterpene lactone, possessesanti-fungal as well as cytotoxic properties. In thisstudy, the effects of Isoalantolactone on cell viability, cellcycle, and apoptosis were investigated in human gastricadenocarcinoma SGC-7901 cells. The results demonstratedthat Isoalantolactone induced morphological changes anddecreased cell viability. Subsequently, we found that Isoalantolactoneinduced G2/M and S phase arrest, which wasassociated with a decrease in the expression level of cyclinB1. Apoptosis triggered by Isoalantolactone was visualizedusing propidium iodide (PI) and Annexin V-FITC/PIstaining. Isoalantolactone-induced apoptosis of SGC-7901cells was associated with the dissipation of mitochondrialmembrane potential (DWm) that was due to the down-regulationof Bcl-2 and up-regulation of Bax that led to thecleavage of caspase-3. Additionally, it was found thatIsoalantolactone was involved in the inhibition of phosphorylationof PI3K/Akt. Isoalantolactone-induced cytotoxicityand apoptosis of SGC-7901 cells involvemitochondria-caspase and PI3K/Akt dependent pathways,which gives the rationale for in vivo studies on the utilizationof Isoalantolactone as a potential cancer therapeuticcompound.