Oxidative stress-related damage of retinal pigment epithelial cells - possible protective properties of autophagocytosed iron-binding proteins

نویسنده

  • Markus Karlsson
چکیده

................................................................................................................... 7 LIST OF PAPERS ........................................................................................................... 9 ABBREVIATIONS ....................................................................................................... 10 INTRODUCTION ......................................................................................................... 13 The normal macula ................................................................................................. 13 Age-related macular degeneration .......................................................................... 15 Prevalence and risk factors .............................................................................. 15 Classification .................................................................................................... 15 The retinal pigment epithelium .............................................................................. 18 General concepts of AMD pathogenesis ................................................................ 19 Oxidative stress-related injury ......................................................................... 19 Structural changes in Bruch’s membrane ........................................................ 20 Inflammation .................................................................................................... 20 Lysosomes .............................................................................................................. 21 Autophagy ......................................................................................................... 22 Iron .......................................................................................................................... 24 Oxidative stress....................................................................................................... 26 Oxygen metabolism .......................................................................................... 26 Reactive oxygen species and free radicals ....................................................... 27 Lipid peroxidation ............................................................................................ 29 Lipofuscin ......................................................................................................... 30 Protective anti-oxidant mechanisms ................................................................ 31 Lysosomal membrane permeabilization ........................................................... 34 Experimental models for AMD .............................................................................. 36 Methods for exposure to oxidative stress ............................................................... 37 DCF ........................................................................................................................ 37

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Crocin protects retinal pigment epithelial cells from oxidative stress through suppression of the MAPK signaling pathway

Oxidative stress damage to retinal pigment epithelial (RPE) cells is thought to play a critical role in the pathogenesis of age-related macular degeneration (AMD). Crocin, a pharmacologically active component of Crocus sativus L., was reported to have anti-antioxidant and anti-apoptotic properties. However, whether crocin protects against oxidative stress-induced retinal damage in RPE cells is ...

متن کامل

Exendin-4 protects retinal pigment epithelial cells against oxidative stress in vitro via PI3K/Akt-STAT3 activation

The glucagon-like peptide 1 (GLP-1) analogue Exendin-4 (Ex-4) could perform anti-oxidative effects against oxidative damage both in vitro and in vivo. However, little was known about the direct protection of Exendin-4 on RPE cells against oxidative stress and its underlying mechanism. The present study examined the protective effects of Exendin-4 on RPE cells against H2O2 treatment in vitro and...

متن کامل

Melissa Officinalis L. Extracts Protect Human Retinal Pigment Epithelial Cells against Oxidative Stress-Induced Apoptosis

BACKGROUND We evaluated the protective effect of ALS-L1023, an extract of Melissa officinalis L. (Labiatae; lemon balm) against oxidative stress-induced apoptosis in human retinal pigment epithelial cells (ARPE-19 cells). METHODS ARPE-19 cells were incubated with ALS-L1023 for 24 h and then treated with hydrogen peroxide (H2O2). Oxidative stress-induced apoptosis and intracellular generation ...

متن کامل

Retinal iron homeostasis in health and disease

Iron is essential for life, but excess iron can be toxic. As a potent free radical creator, iron generates hydroxyl radicals leading to significant oxidative stress. Since iron is not excreted from the body, it accumulates with age in tissues, including the retina, predisposing to age-related oxidative insult. Both hereditary and acquired retinal diseases are associated with increased iron leve...

متن کامل

Retinal Pigment Epithelium Is Protected Against Apoptosis by B-Crystallin

PURPOSE. The degeneration of retinal pigment epithelial (RPE) cells is considered to be a crucial event in the pathophysiology of age-related macular degeneration (AMD). Cumulative oxidative damage has been implicated in the development of the changes seen in AMD. The present study was undertaken to evaluate the expression of the small heat shock protein Bcrystallin in the RPE in response to ox...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2014