کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8299169 | 1537052 | 2008 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Novel mechanism of elimination of malfunctioning mitochondria (mitoptosis): Formation of mitoptotic bodies and extrusion of mitochondrial material from the cell
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کلمات کلیدی
PTPFCCPMDCDNP2,4-Dinitrophenol - 2،4-دینیتروفنلROS - ROSΔψ - Δρtransmembrane electric potential difference - اختلاف پتانسیل الکتریکی فرابنفشPermeability transition pore - افت فشار نفوذ پذیریmonodansyl cadaverine - مادوناسیل کاداورینMitochondria - میتوکندریاReactive oxygen species - گونههای فعال اکسیژن
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Energy catastrophe, when mitochondria hydrolyze glycolytic ATP instead of producing respiratory ATP, has been modeled. In highly glycolyzing HeLa cells, 30-50% of the population survived after inhibition of respiration and uncoupling of oxidative phosphorylation for 2-4Â days. The survival was accompanied by selective elimination of mitochondria. This type of mitoptosis includes (i) fission of mitochondrial filaments, (ii) clustering of the resulting roundish mitochondria in the perinuclear area, (iii) occlusion of mitochondrial clusters by a membrane (formation of a “mitoptotic body”), (iv) decomposition of mitochondria inside this body to small membrane vesicles, (v) protrusion of the body from the cell, and (vi) disruption of the body boundary membrane. Autophagy was not involved in this mitoptotic program. Increased production of reactive oxygen species (ROS) was necessary for execution of the program, since antioxidants prevent mitoptosis and kill the cells treated with the mitochondrial poisons as if a ROS-linked mitoptosis serves for protection of the cells under conditions of severe mitochondrial stress. It is suggested that exocytosis of mitoptotic bodies may be involved in maturation of reticulocytes and lens fiber cells.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochimica et Biophysica Acta (BBA) - Bioenergetics - Volume 1777, Issues 7â8, JulyâAugust 2008, Pages 817-825
Journal: Biochimica et Biophysica Acta (BBA) - Bioenergetics - Volume 1777, Issues 7â8, JulyâAugust 2008, Pages 817-825
نویسندگان
Konstantin G. Lyamzaev, Olga K. Nepryakhina, Valeria B. Saprunova, Lora E. Bakeeva, Olga Yu. Pletjushkina, Boris V. Chernyak, Vladimir P. Skulachev,