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Essay On Oxidative Cancer

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The involvement of oxidative stress in cancer development and promotion is considered by many cancer researchers. The cause of oxidative stress may be an overproduction of ROS or insufficient antioxidant capacity (29). Thus, in this study we determined the enzymatic activities of ARE and AChE along with MDA and TAC levels in the patients with breast cancer. In the current study, the erythrocytic AChE activity was significantly lower in MBT compared to the control group (P = 0.003) . There was no significant difference between the BBD and control groups, as well as, MBT and BBD groups. Some studies have presented the involvement of AChE in oxidative stress that supports our results . Molochkina et al . documented ROS mediated inhibition of …show more content…

In the current study, we also measured plasma arylesterase activity of Paraoxonase 1 (PON1). Paraoxonase 1 is a high-density lipoprotein-cholesterol (HDL-c) associated enzyme that protects both HDL and low-density lipoprotein- Cholesterol (LDL-c) from oxidative modifications (39). Generally, human PONs have different functions in the body such as inactivation of pro-oxidant and pro-inflammatory mediators, metabolism of certain drugs and xenobiotic , and regulation of cells proliferation(40). Since ARE has anti-oxidative properties (41), we propose that ARE activity may be affected in patients with breast cancer. The results of ARE activity indicated that significant changes in plasma ARE activity of the patients with MBT and BBD compared to healthy subjects (P < 0.01) so that the enzyme activity in patients was less than the control. ARE activity was lower in the MBT group than BBD, but it were not shown significant difference. It is worth noting that in our study the enzyme activity in patients with BBD was also lower than normal (P < 0.01). Bobin-Dubigeon et al. was reported that plasma ARE activity in breast cancer patients was lower than the control group. Their study confirmed the positive association between ARE hydrolysis rate and survival time, so that lower ARE activity increases the death rate of patients (42). Anyway, based on literature data, plasma ARE activity is

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