Effects of Exercise Therapy on Natural Killer Cell Cytotoxic Activity in Breast Cancer Patients after Curative Surgery.
- Author:
Young Moo NA
1
;
Kil Byung LIM
;
Hong Jae LEE
;
Yong Kyun KIM
;
Yoon Jeong LEE
;
Hue Dae LEE
;
Geon Cheol LEE
Author Information
1. Department of Rehabilitation Medicine, Inje University Ilsan Paik Hospital, Korea. yacha@hanmail.net
- Publication Type:Original Article ; Randomized Controlled Trial
- Keywords:
Natural killer cell cytotoxic activity;
Breast cancer;
Exercise therapy;
Cancer rehabilitation
- MeSH:
Breast Neoplasms*;
Breast*;
Exercise Therapy*;
Humans;
Immunity, Cellular;
K562 Cells;
Killer Cells, Natural*;
Mastectomy;
Neoplasm Metastasis
- From:Journal of the Korean Academy of Rehabilitation Medicine
2003;27(2):250-254
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
OBJECTIVE: Exercise may contribute to alteration in cancer in many ways. The major cell in cellular immunity to defense against cancer cell is natural killer [NK] cell. So this study is aimed to investigate the effects of exercise on NK cell cytotoxic activity (NKCA) in breast cancer patients who underwent mastectomy. METHOD: Thirty-one breast cancer patients who had undergone curative surgery were randomly assigned to an exercise group (n=16) and a non-exercise group (n=15). Exercise therapy was consisted of aerobic activity such as bicycle ergometer for 30 minutes, twice a day, five times each week for 2 weeks. The venous blood samplings were obtained on postoperative days 1, 7 and 14. NKCA was assayed by cytotoxic response against K562 cells. The venous blood samplings were obtained on postoperative days 1, 7 and 14. NKCA was assayed by cytotoxic response against K562 cells. RESULT: The baseline study did not show any statistical difference between exercise group and non-exercise group. Mean NKCA of day 7 decreased in both groups compared with that at postoperative day 1 (p<0.05). At day 14, the difference of the mean NKCA between two groups was not significant, but the mean NKCA of the exercise group without metastasis demonstrated a significant increase compared with that of the non-exercise group without metastasis (p<0.05). CONCLUSION: This study suggested that early moderate exercise had a beneficial effect on the function of NK cells in early stage of breast cancer patients after curative surgery. A further study will be needed to evaluate long-term effect of exercise on NK cell.
