Effects of Menadione, Hydrogen Peroxide, and Quercetin on Apoptosis and Delayed Luminescence of Human Leukemia Jurkat T-Cells

被引:54
|
作者
Baran, Irina [1 ]
Ganea, Constanta [1 ]
Scordino, Agata [2 ,3 ]
Musumeci, Francesco [2 ,3 ]
Barresi, Vincenza [4 ]
Tudisco, Salvatore [2 ,3 ]
Privitera, Simona [2 ,3 ]
Grasso, Rosaria [2 ,3 ]
Condorelli, Daniele F. [4 ]
Ursu, Ioan [5 ]
Baran, Virgil [5 ]
Katona, Eva [1 ]
Mocanu, Maria-Magdalena [1 ]
Gulino, Marisa [2 ,3 ]
Ungureanu, Raluca [1 ]
Surcel, Mihaela [6 ]
Ursaciuc, Cornel [6 ]
机构
[1] Carol Davila Univ Med & Pharm, Dept Biophys, Bucharest 050474, Romania
[2] Ist Nazl Fis Nucl, Lab Nazl Sud, I-95129 Catania, Italy
[3] Univ Catania, Dipartimento Metodol Fis & Chim Ingn, I-95125 Catania, Italy
[4] Univ Catania, Dipartimento Sci Chim, Sez Biochim & Biol Mol, I-95125 Catania, Italy
[5] IFIN HH, Magurele 077125, Romania
[6] Victor Babes Natl Inst, Dept Immunol, Bucharest, Romania
关键词
Apoptosis; Delayed luminescence; Oxidative stress; Flavonoids; Mitochondrial respiratory chain; Leukemia; OXIDATIVE STRESS; LIGHT-EMISSION; MITOCHONDRIAL; CANCER; FLUORESCENCE; OXYGEN; FLAVONOIDS; RADIATION; ELECTRON; CYTOTOXICITY;
D O I
10.1007/s12013-010-9104-1
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Menadione (MD) is an effective cytotoxic drug able to produce intracellularly large amounts of superoxide anion. Quercetin (QC), a widely distributed bioflavonoid, can exert both antioxidant and pro-oxidant effects and is known to specifically inhibit cell proliferation and induce apoptosis in different cancer cell types. We have investigated the relation between delayed luminescence (DL) induced by UV-laser excitation and the effects of MD, hydrogen peroxide, and QC on apoptosis and cell cycle in human leukemia Jurkat T-cells. Treatments with 500 mu M H(2)O(2) and 250 mu M MD for 20 min produced 66.0 +/- A 4.9 and 46.4 +/- A 8.6% apoptotic cell fractions, respectively. Long-term (24 h) pre-exposure to 5 mu M, but not 0.5 mu M QC enhanced apoptosis induced by MD, whereas short-term (1 h) pre-incubation with 10 mu M QC offered 50% protection against H(2)O(2)-induced apoptosis, but potentiated apoptosis induced by MD. Since physiological levels of QC in the blood are normally less than 10 mu M, these data can provide relevant information regarding the benefits of flavonoid-combined treatments of leukemia. All the three drugs exerted significant effects on DL. Our data are consistent with (1) the involvement of Complex I of the mitochondrial respiratory chain as an important source of delayed light emission on the 10 mu s-10 ms scale, (2) the ability of superoxide anions to quench DL on the 100 mu s-10 ms scale, probably via inhibition of reverse electron transfer at the Fe/S centers in Complex I, and (3) the relative insensitivity of DL to intracellular OH(aEuro cent) and H(2)O(2) levels.
引用
收藏
页码:169 / 179
页数:11
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