RAS/MAPK signaling functions in oxidative stress, DNA damage response and cancer progression

Area of Science:

• Molecular Biology
• Cellular Signaling
• Oncology

Background:

• Mitogen-activated protein kinase (MAPK) pathways regulate vital cellular processes like growth, differentiation, and apoptosis.
• Dysregulation of MAPK signaling cascades is implicated in the pathogenesis of various human cancers.
• Oxidative stress and DNA damage are key factors leading to carcinogenesis through MAPK pathway dysregulation.

Purpose of the Study:

• To comprehensively review the critical role of MAPK signaling in the context of oxidative stress, DNA damage, and cancer progression.
• To elucidate the involvement of MAPK pathways in cellular responses to oxidative stress and DNA damage.
• To highlight the association between MAPK signaling and tumor suppression mechanisms.

Main Methods:

• Literature review of studies investigating MAPK signaling.
• Analysis of research on the interplay between oxidative stress, DNA damage, and MAPK pathways.
• Synthesis of evidence linking MEK/ERK pathway activation to DNA damage response (DDR).

Main Results:

• Reactive oxygen species (ROS) activate MAPK pathways, including extracellular signal-regulated kinase (ERK) 1/2 and p38, in response to oxidative stress.
• The MEK/ERK pathway is essential for the proper functioning of cellular DNA damage response (DDR) and tumor suppression.
• Activation of the MEK/ERK pathway during DDR contributes to checkpoint activation and inhibition of cell division.

Conclusions:

• MAPK signaling pathways are central regulators of cellular responses to oxidative stress and DNA damage.
• Aberrant MAPK signaling contributes significantly to cancer development and progression.
• Understanding MAPK's role in DDR offers potential therapeutic strategies for cancer treatment.