Pro-oxidant and antitumor effects of curcumin and N-ethylmaleimide in the HA22T/VGH model Overt hepatocellular carcinoma.

Antitumor effects of the novel NF-κB inhibitor dehydroxymethyl-epoxyquinomicin on human hepatic cancer cells: analysis of synergy with cisplatin and of possible correlation with inhibition of pro-survival genes and IL-6 production

We tested the novel NF-kappaB inhibitor dehydroxymethylepoxyquinomicin (DHMEQ) in the hepatic cancer (HCC) HepG2, HA22T/VGH and HuH-6 cells. The sensitivity to the cell growth inhibitory and apoptotic effects of the agent increased along with the levels of constitutively activated NF-kappaB, which were low in HepG2 and higher in HA22T/VGH and HuH-6. In HA22T/VGH, DHMEQ exhibited synergy with cisplatin. In the same cells, DHMEQ exerted dose-dependent decreases in the nuclear levels of activated NF-kappaB and attenuated NF-kappaB activation by cisplatin. It down-regulated Bcl-XL mRNA in a dose-dependent manner and up-regulated that of Bcl-XS. It also decreased interleukin 6 (IL-6), NAIP and, …

Findings of osteonecrosis of the jaw under combined bisphosphonate and antiangiogenic therapies: an emergent problem?

Farmacovigilanza in oncologia: la nostra esperienza nel "Centro di consulenza ed informazione sugli effetti tossici da farmaci antitumorali e sulle ADR in pazienti neoplastici" della Regione Sicilia

La segnalazione delle reazioni avverse da farmaci (ADR) in ambito post-marketing è fondamentale per la tempestiva identificazione di nuove, in particolare gravi, tossicità, che, non emergono facilmente nei trial pre-registrativi.per vari limiti. La farmacovigilanza (FV) è necessaria per una identificazione più completa della sicurezza e dell’impatto sulla qualità di vita di un nuovo medicamento nella pratica clinica reale, dove i pazienti, per differenti ragioni (patologie multiple, corredo genetico, usi off-label, etc.) sono a maggior rischio di ADR e di interazioni tra farmaci. In passato i farmaci antineoplastici non sono stati oggetto di attenzione prioritaria nei programmi nazionali o …

The NF-kB inhibitors curcumin and DHMEQ exert antitumor synergy with cisplatin in hepatic cancer cells. Analysis of relationship to IL-6 production.

Use of herbal products among cancer and transplanted patients in the town of Palermo,Sicily.

“Antitumor effects of curcumin in human hepatic cancer cells: Analysis of their relationship to inhibition of NF-kB and pro-survival gene expression”.

“Antitumor and molecular effects of curcumin and of its isoxazole analogue on multidrug resistant breast cancer cells. New perspectives in tumor theraphy: molecular aspects, 2006”.

The antitumor activities of curcumin and its isoxazole analogue are not affected by multiple gene expression changes in an MDR model of the MCF-7 brest cancer cell line: Analysis of the possible molecular basis.

We examined the effects of curcumin and of its isoxazole analogue MR 39 in the MCF-7 breast cancer cell line and in its multidrug-resistant (MDR) variant MCF-7R. In comparison with MCF-7, MCF-7R lacks estrogen receptor alpha (ERalpha) and overexpressess P-glycoprotein (P-gp), different IAPs (inhibitory of apoptosis proteins) and COX-2. Through analyses of the effects on cell proliferation, cycling and death, we have observed that the antitumor activity of curcumin and of the more potent (approximately two-fold) MR 39 is at least equal in the MDR cell line compared to the parental MCF-7. Similar results were observed also in an MDR variant of HL-60 leukemia. RT-PCR evaluations performed in M…

Antitumor effects of curcumin and structurally β-diketone modified analogs on multidrug resistant cancer cells

Abstract Using concepts of bioisostery a series of curcumin analogs were synthesized: the diketonic system of the compound was elaborated into enaminones, oximes, and the isoxazole heterocycle. The cell growth inhibitory and apoptosis inducing effects of the new analogs were evaluated by in vitro assays in the hepatocellular carcinoma HA22T/VGH cells, as well as in the MCF-7 breast cancer cell line and in its multidrug resistant (MDR) variant MCF-7R. Increased antitumor activity on all cell lines was found with the isoxazole analog and especially with the benzyl oxime derivative; in the HA22T/VGH cell model, the latter compound inhibited constitutive NF-κB activation.