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Betulinic acid (BA) is known to induce apoptosis in melanoma neuroectodermal and malignant brain cancer cell lines. Present report describes the role of antioxidants on the BA-induced toxicity to human cell line SK-N-MC. Hydrophilic antioxidants viz., L-ascorbic acid (VitC) and N-acetyl-L-cysteine
In this study, the effect of tumor presence on the concentration of vitamin E in the liver, spleen, and kidney of BALB/c mice was measured, and the influence of the degree of fat saturation was assessed. In mice fed diets deficient in vitamin E, the presence of a transplanted sarcoma in the thigh
There has been an increasing interest in the measurement of carotenoids, retinoids, and tocopherols in human tissues because some of these micronutrients have been shown to have chemopreventive activity. Since clinical tissue samples obtained for analysis are usually small in quantity, a sensitive
Several non-surgical tumor treatment modalities produce their cytotoxic activity by generating reactive oxygen species (ROS). Anti-oxidative enzymes such as superoxide dismutase (SOD) or exogenously supplied antioxidants may therefore reduce the efficacy of these treatments. The aim of the present
Prolonged cancer chemotherapy is associated with the development of multidrug resistance (MDR), which is a major cause of treatment failure. Photodynamic therapy (PDT) has been applied as anticancer therapy and a means of circumventing MDR. The antiproliferative effect of pheophorbide a-mediated
Many tumor treatment modalities such as ionizing radiation or some chemotherapy induce reactive oxygen species (ROS) resulting in therapeutic cell damage. The aim of this study was to analyze whether such ROS induction may affect the mechanical stability of solid tumor tissue by degradation of the
Developing multifunctional nanoparticles (NPs) to improve therapeutic efficacy is highly desirable in cancer therapy. In an attempt to respond to such a challenge, a novel copolymer, d-α-tocopherol polyethylene glycol succinate-SS-poly(lactide) (TPGS-SS-PLA) with a disulfide linkage between the TPGS
Tocopherol, a well known tissue anti-oxidant, given before local X-ray irradiation of 2 transplantable rat tumours was previously found to increase significantly the effect of irradiation. In the present study tocopherol did not influence the development of tumour necroses during growth of a
The influence of tocopherol, administered intramuscularly in different single doses, on the effect of local irradiation of a transplanted rat sarcoma was investigated. Tocopherol in doses of 5, 25 or 50 mg/100 g body weight enhanced significantly the tumour growth retardation induced by irradiation.
Paclitaxel (PTX) is one of the most effective antineoplastic drugs. Its current clinical administration Taxol(®) is formulated in Cremophor EL, which causes serious side effects. Nanoparticles (NP) with lower systemic toxicity and enhanced therapeutic efficiency may be an alternative formulation of
Many non-surgical tumor treatments induce reactive oxygen species (ROS) which result in cell damage. This study investigated the impact of ROS induction on the expression of adhesion molecules and whether alpha-tocopherol pre-treatment could have a protective effect. Experimental rat DS-sarcomas
Modification effect of sodium salts and ethers of linolenic, arachidonic and alpha-linolenic acids on the growth of transplantable mouse tumors was examined. Polyunsaturated fatty acids (PUFA) enhanced the growth of mammary adenocarcinoma Ca-755, whereas the opposite effect was observed in mice with
We examined expression of the c-myc gene by the dot blot hybridization of total cellular RNA from mouse primary tumors induced by chemicals and radiations. Expression of the c-myc gene was found to be elevated in 69 cases among 177 independently induced tumors of 12 different types. DNA from tumors
The quinonoid anthracycline, doxorubicin (Adriamycin), is a widely used potent antineoplastic agent, showing the broadest spectrum of antineoplastic activity against various types of solid carcinomas, hematological malignancies, and soft tissue sarcomas. Unfortunately, the clinical use of
Tocotrienols were evaluated for activity against transplantable murine tumors inoculated i.p. into mouse, and the activities of two tocotrienols and alpha-tocopherols were compared. When the compounds were injected i.p., alpha- and gamma-tocotrienols were effective against sarcoma 180, Ehrlich