open access

Vol 12, No 6 (2007)
Untitled
Published online: 2007-11-01
Submitted: 2007-04-19
Get Citation

Plasma total antioxidant status in breast cancer women in relation to lymph node involvement and HER-2/neu expression

Miłoslawa Zowczak-Drabarczyk, Dawid Murawa, Karol Połom, Monika Szarszewska, Wojciech Nowakowski, Michał Mańczak
DOI: 10.1016/S1507-1367(10)60071-5
·
Rep Pract Oncol Radiother 2007;12(6):319-322.

open access

Vol 12, No 6 (2007)
Untitled
Published online: 2007-11-01
Submitted: 2007-04-19

Abstract

Background

Oxidants can act at several stages of malignant transformation. To protect against toxic effects of oxidants and to modulate physiological effects of their action organisms have developed antioxidant defence systems. Plasma total antioxidant activity (TAS) measures peroxyl-scavenging capacity of the extracellular antioxidant system.

Aim

The goal of this pilot study was to evaluate the plasma total antioxidant status in breast cancer women in relation to lymph node metastases and HER-2/neu expression.

Materials/Methods

Newly diagnosed consecutive breast cancer patients (n=26) were recruited before any treatment and matched with controls (n=24) randomly selected from benign breast disease patients. Cancer progress was established according to lymph node involvement: No or N+. HER-2/neu was considered as either negative (0 or 1+) or positive (2+ or 3+). The plasma total antioxidant status (TAS) was measured by colorimetric test (RANDOX). HER-2/neu oncogene expression was determined in breast cancer tissue using the immunohistochemical method (Hercep Test).

Results

The study demonstrated a significant decrease in the mean TAS level (mmol/L) in the breast cancer group (1.42±0.22) in comparison to the control group (1.56±0.18; P<0.01). The mean TAS concentration was found not to differ significantly between breast cancer subgroups in relation to the progress of the disease. Although the mean TAS concentration was not significantly different in regard to the HER-2/neu expression, there was a tendency observed towards higher TAS in the HER-2/neu negative subgroup (1.46±0.20) than in the HER-2/neu positive one (1.41±0.25).

Conclusions

The results of the study suggest increased consumption of plasma antioxidants in response to enhanced oxidants production in breast cancer patients. Changes in TAS level do not seem to correspond with the progress of the malignancy but might be related to HER-2/neu expression.

Abstract

Background

Oxidants can act at several stages of malignant transformation. To protect against toxic effects of oxidants and to modulate physiological effects of their action organisms have developed antioxidant defence systems. Plasma total antioxidant activity (TAS) measures peroxyl-scavenging capacity of the extracellular antioxidant system.

Aim

The goal of this pilot study was to evaluate the plasma total antioxidant status in breast cancer women in relation to lymph node metastases and HER-2/neu expression.

Materials/Methods

Newly diagnosed consecutive breast cancer patients (n=26) were recruited before any treatment and matched with controls (n=24) randomly selected from benign breast disease patients. Cancer progress was established according to lymph node involvement: No or N+. HER-2/neu was considered as either negative (0 or 1+) or positive (2+ or 3+). The plasma total antioxidant status (TAS) was measured by colorimetric test (RANDOX). HER-2/neu oncogene expression was determined in breast cancer tissue using the immunohistochemical method (Hercep Test).

Results

The study demonstrated a significant decrease in the mean TAS level (mmol/L) in the breast cancer group (1.42±0.22) in comparison to the control group (1.56±0.18; P<0.01). The mean TAS concentration was found not to differ significantly between breast cancer subgroups in relation to the progress of the disease. Although the mean TAS concentration was not significantly different in regard to the HER-2/neu expression, there was a tendency observed towards higher TAS in the HER-2/neu negative subgroup (1.46±0.20) than in the HER-2/neu positive one (1.41±0.25).

Conclusions

The results of the study suggest increased consumption of plasma antioxidants in response to enhanced oxidants production in breast cancer patients. Changes in TAS level do not seem to correspond with the progress of the malignancy but might be related to HER-2/neu expression.

Get Citation

Keywords

antioxidant status; breast cancer; plasma; cancer progress; HER-2/neu expression

About this article
Title

Plasma total antioxidant status in breast cancer women in relation to lymph node involvement and HER-2/neu expression

Journal

Reports of Practical Oncology and Radiotherapy

Issue

Vol 12, No 6 (2007)

Pages

319-322

Published online

2007-11-01

DOI

10.1016/S1507-1367(10)60071-5

Bibliographic record

Rep Pract Oncol Radiother 2007;12(6):319-322.

Keywords

antioxidant status
breast cancer
plasma
cancer progress
HER-2/neu expression

Authors

Miłoslawa Zowczak-Drabarczyk
Dawid Murawa
Karol Połom
Monika Szarszewska
Wojciech Nowakowski
Michał Mańczak

Important: This website uses cookies. More >>

The cookies allow us to identify your computer and find out details about your last visit. They remembering whether you've visited the site before, so that you remain logged in - or to help us work out how many new website visitors we get each month. Most internet browsers accept cookies automatically, but you can change the settings of your browser to erase cookies or prevent automatic acceptance if you prefer.

By "Via Medica sp. z o.o." sp.k., ul. Świętokrzyska 73, 80–180 Gdańsk, Poland
tel.:+48 58 320 94 94, fax:+48 58 320 94 60, e-mail: journals@viamedica.pl