title: Effect of gamma irradiation on spleen cell function and cytotoxicity of doxorubicin.
abstract: The present study was attempted to evaluate the effects of gamma-irradiated doxorubicin (IRD) on spleen cell proliferation, cytokines release (IFN-gamma and IL-2) and lung metastasis in mice. Gamma irradiation induced degradation of doxorubicin molecule and cytotoxicity on melanoma (B16BL6) and myoblast (H9c2) cell lines were determined by high performance liquid chromatography (HPLC) and MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide tetrazole) assay, respectively. Non-irradiated doxorubicin (NIRD) was used as a control. The mice injected with NIRD (2mg/kg body weight for 5 days, 24h interval) showed a considerable decrease (P<0.05) in the body, spleen weight, proliferation and cytokine release (IL-2 and IFN-gamma) as compared to control. However, a non-significant variation was observed in IRD treated mice compared with normal. Tumor bearing mice treated with NIRD and IRD (2mg/kg body weight, five doses at 48 h interval) showed diverse results on spleen cell cytokine release, proliferation and metastasis. HPLC results revealed the formation of several trace level degradation (P<0.05) products of IRD. IRD displayed a non-significant variation of cytotoxicity on B16BL6 cells, and low percentage (P<0.01) of cardiotoxicity on H9c2 cells as compared to NIRD. Altogether, this present study emphasis that gamma irradiation altered the property of doxorubicin.
authors.affiliation: Radiation Food Science and Biotechnology Team, Advanced Radiation Technology Institute, Korean Atomic Energy Research Institute, 1266 Sinjeong-dong, Jeong-eup 580-185, Republic of Korea. sjwlee@kaeri.re.kr <sjwlee@kaeri.re.kr>
authors.forename: Ju-Woon
authors.initials: JW
authors.lastname: Lee
authors.forename: Nak-Yun
authors.initials: NY
authors.lastname: Sung
authors.forename: Jae-Kyung
authors.initials: JK
authors.lastname: Kim
authors.forename: Jae-Hun
authors.initials: JH
authors.lastname: Kim
authors.forename: Hanumantha Rao Balaji
authors.initials: HR
authors.lastname: Raghavendran
authors.forename: Yung-Choon
authors.initials: YC
authors.lastname: Yoo
authors.forename: Mee-Hye
authors.initials: MH
authors.lastname: Shin
authors.forename: Myung-Woo
authors.initials: MW
authors.lastname: Byun
mesh_terms: D000818:Animals; D000903:Antibiotics, Antineoplastic / Q000737:chemistry / Q000494:pharmacology / Q000528:radiation effects; D001835:Body Weight / Q000187:drug effects; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D002478:Cells, Cultured; D002851:Chromatography, High Pressure Liquid; D004317:Doxorubicin / Q000737:chemistry / Q000494:pharmacology* / Q000528:radiation effects*; D004354:Drug Screening Assays, Antitumor; D004355:Drug Stability; D005720:Gamma Rays; D007371:Interferon-gamma / Q000096:biosynthesis; D007376:Interleukin-2 / Q000096:biosynthesis; D008175:Lung Neoplasms / Q000188:drug therapy* / Q000556:secondary; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D032446:Myoblasts / Q000187:drug effects; D009368:Neoplasm Transplantation; D009929:Organ Size / Q000187:drug effects; D013154:Spleen / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism
chemical_list: D000903:Antibiotics, Antineoplastic; D007376:Interleukin-2; D004317:Doxorubicin; D007371:Interferon-gamma