The first part of the study consists of sonication (572 kHz) in the presence of zero-valent iron (ZVI) with or without H2O2 to select and optimize the operational parameters as frequency, time, initial solute concentration, dose of reagents and pH.
In the batch adsorption experiments, the effect of different parameters (i.e., pH, contact time, initial CR concentration, dose of biosorbent, and temperature) on adsorption of CR was studied.
The cytotoxicity started at a concentration dose of 0.1% when HepG2 cells were treated and incubated up to 72 hr.
Based on these analyses, it was estimated that the concentration (dose) of 267 in the 267/Dt combination required to achieve an ED50 could be reduced by up to 3.6-fold in the LCC6 cell line.
Group III animals received vitamin E at a concentration of 50 mg/kg body weight and animals of groups IV, V and VI were given extract of Podophyllum hexandrum at concentration dose of 20, 30 and 50 mg/kg body weight.
Based on this consideration, we investigated the efficacy of low-concentration doses of metformin alone or in combination with tamoxifen in a model of ER-positive breast cancer that reflects treatment strategies in common clinical use.
To better understand the various pathways associated with taxane resistance, our laboratory selected MCF-7 breast tumor cells for survival in increasing concentrations (doses) of paclitaxel (MCF-7TAX-1 cells) [ 24] or docetaxel (MCF-7TXT cells) [ 23].
It was found that the concentrations (doses) of CEPO that confer tissue protection were higher than those that caused erythropoiesis, and that its affinity for the 'classical' EPOR was dramatically reduced.
MCF-7 breast tumour cells were exposed to progressively higher concentrations (doses) of chemotherapy drugs, beginning at a dose equivalent to 1/1000th of the concentration required to kill or inhibit the growth of 50% of wild-type MCF-7 cells (the IC50).
This allowed them to derive new dose-response relationships relating the observed health response to the total internal dose of the metabolites at the target tissue (bone marrow in this case), rather than to the external environmental concentrations (doses) of the chemicals in the mixture.
