Ganoderma lucidum and oxidative DNA damage: the role cellular antioxidant system

Result code in IS VaVaI

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Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Ganoderma lucidum and oxidative DNA damage: the role cellular antioxidant system

Original language description

Reactive oxygen species (ROS) are a group of highly reactive molecules tightly controlled by cellular antioxidant system. Disturbance in the prooxidation–antioxidation homeostasis can lead to ROS accumulation and consequently to DNA damage, as well as apoptosis. Many natural compounds such as Ganoderma lucidum (GLC) possess anticancer activities with the generation of ROS. Because the cancer cells are most sensitive to oxidative DNA damage as non-cancerous cells, oxidative damage is a potential target to enhance the activity of anticancer treatment by natural compounds which may lead to selective cancer cell death.nThe aim of our study was to define effect of GLC extracts on cellular antioxidant system, oxidative DNA damage in colorectal cell lines (HTC116, HCT116-/-, HT29). Our results showed that 24 hrs GLC treatment (0,5mg/ml) inhibits activity of SOD1 (25%, p<0.01) in HCT116 as well as enzymatic activity of GpX (20%, p<0.01), followed by abnormal reactive oxygen species accumulation. Moreover, GLC significantly decreased a level of nuclear respiratory factor1 (NRF1), transcription factor critical for expression of antioxidant response dependent genes. The specific oxidative DNA damage increased (x%, p<0.05) after GLC treatment (0.5mg/ml, p<0.05), whereas the specific DNA repair process was inhibited. Finally, this led to decreased HCT116 survival (25%, p<0.05).nOur results clearly suggest that GLC extract strongly decrease activity of cellular antioxidant system and lead oxidative DNA damage and cell death in colorectal cancer cell lines. This indicates that natural compounds with prooxidant activity are potential target for selective improvement of anti-cancer treatment.n

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

EE - Microbiology, virology

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů