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Original

Protective effect of augmenter of liver regeneration on hydrogen peroxide-induced apoptosis in SH-SY5Y human neuroblastoma cells

, , , , , , , , , , & show all
Pages 865-875 | Received 16 Mar 2009, Published online: 01 Sep 2009
 

Abstract

Background: Hydrogen peroxide, as other reactive oxygen species (ROS) produced during redox processes, induces lipid membrane peroxidation and protein degeneration causing cell apoptosis. ROS are recently considered as messengers in cell signalling processes, which, through reversible protein disulphide bridges formation, activate regulatory factors of cell proliferation and apoptosis. Disulphide bridges formation is catalysed by sulphydryl oxidase enzymes.

Aim: The neuroprotective effect of ALR protein (Alrp), a sulphydryl oxidase enzyme, on H2O2-induced apoptosis in SH-SY5Y cells has been evaluated.

Methods: Cell viability, flow cytometric evaluation of apoptotic cells, fluorescent changes of nuclear morphology, immunocytochemistry Alrp detection, Western blot evaluation of mitochondrial cyt c release and mitochondrial swelling were determined.

Results: Alrp prevents the H2O2-induced cell viability loss, apoptotic cell death and mitochondrial swelling in SH-SY5Y cells in culture.

Conclusions: The data demonstrate that Alrp improves SH-SY5Y cells survival in H2O2-induced apoptosis. It is speculated that this effect could be related to the Alrp enzymatic activity.

Abbreviations
ALR=

augmenter of liver regeneration

Alrp=

augmenter of liver regeneration protein

MTT=

3-[4,5-dimethyl-2-thiazollyl]-2,5-diphenyl-2-tetrazolium bromide

FBS=

foetal bovine serum

Abbreviations
ALR=

augmenter of liver regeneration

Alrp=

augmenter of liver regeneration protein

MTT=

3-[4,5-dimethyl-2-thiazollyl]-2,5-diphenyl-2-tetrazolium bromide

FBS=

foetal bovine serum

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