Cardiolipin, Perhydroxyl Radicals, and Lipid Peroxidation in Mitochondrial Dysfunctions and Aging
المؤلفون المشاركون
Dikalov, Sergey I.
Panov, Alexander
المصدر
Oxidative Medicine and Cellular Longevity
العدد
المجلد 2020، العدد 2020 (31 ديسمبر/كانون الأول 2020)، ص ص. 1-14، 14ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2020-09-09
دولة النشر
مصر
عدد الصفحات
14
التخصصات الرئيسية
الملخص EN
Mitochondrial dysfunctions caused by oxidative stress are currently regarded as the main cause of aging.
Accumulation of mutations and deletions of mtDNA is a hallmark of aging.
So far, however, there is no evidence that most studied oxygen radicals are directly responsible for mutations of mtDNA.
Oxidative damages to cardiolipin (CL) and phosphatidylethanolamine (PEA) are also hallmarks of oxidative stress, but the mechanisms of their damage remain obscure.
CL is the only phospholipid present almost exclusively in the inner mitochondrial membrane (IMM) where it is responsible, together with PEA, for the maintenance of the superstructures of oxidative phosphorylation enzymes.
CL has negative charges at the headgroups and due to specific localization at the negative curves of the IMM, it creates areas with the strong negative charge where local pH may be several units lower than in the surrounding bulk phases.
At these sites with the higher acidity, the chance of protonation of the superoxide radical (O2•), generated by the respiratory chain, is much higher with the formation of the highly reactive hydrophobic perhydroxyl radical (HO2•).
HO2• specifically reacts with the double bonds of polyunsaturated fatty acids (PUFA) initiating the isoprostane pathway of lipid peroxidation.
Because HO2• is formed close to CL aggregates and PEA, it causes peroxidation of the linoleic acid in CL and also damages PEA.
This causes disruption of the structural and functional integrity of the respirosomes and ATP synthase.
We provide evidence that in elderly individuals with metabolic syndrome (MetS), fatty acids become the major substrates for production of ATP and this may increase several-fold generation of O2• and thus HO2•.
We conclude that MetS accelerates aging and the mitochondrial dysfunctions are caused by the HO2•-induced direct oxidation of CL and the isoprostane pathway of lipid peroxidation (IPLP).
The toxic products of IPLP damage not only PEA, but also mtDNA and OXPHOS proteins.
This results in gradual disruption of the structural and functional integrity of mitochondria and cells.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Panov, Alexander& Dikalov, Sergey I.. 2020. Cardiolipin, Perhydroxyl Radicals, and Lipid Peroxidation in Mitochondrial Dysfunctions and Aging. Oxidative Medicine and Cellular Longevity،Vol. 2020, no. 2020, pp.1-14.
https://search.emarefa.net/detail/BIM-1203671
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Panov, Alexander& Dikalov, Sergey I.. Cardiolipin, Perhydroxyl Radicals, and Lipid Peroxidation in Mitochondrial Dysfunctions and Aging. Oxidative Medicine and Cellular Longevity No. 2020 (2020), pp.1-14.
https://search.emarefa.net/detail/BIM-1203671
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Panov, Alexander& Dikalov, Sergey I.. Cardiolipin, Perhydroxyl Radicals, and Lipid Peroxidation in Mitochondrial Dysfunctions and Aging. Oxidative Medicine and Cellular Longevity. 2020. Vol. 2020, no. 2020, pp.1-14.
https://search.emarefa.net/detail/BIM-1203671
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1203671
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر