Succinate in the cancer-immune cycle

Area of Science:

• Biochemistry
• Immunology
• Oncology

Background:

• Succinate is a vital tricarboxylic acid (TCA) cycle intermediate, crucial for ATP generation in mitochondria.
• Succinate metabolism is interconnected with other metabolic pathways, including the glutamine pathway's GABA shunt.
• Emerging evidence highlights succinate's significant roles in cellular immunity and cancer development.

Purpose of the Study:

• To review the expanding functions of succinate beyond its metabolic roles.
• To explore succinate's involvement in the hypoxic response and tumorigenesis.
• To investigate succinate as a potential inflammatory signal in cancer and inflammatory diseases.

Main Methods:

• Literature review of succinate's roles in metabolism, immunity, and cancer.
• Analysis of succinate's involvement in protein succinylation.
• Examination of the impact of mutations in succinate dehydrogenase (SDH).

Main Results:

• Succinate modulates the hypoxic response and is implicated in tumorigenesis.
• Protein succinylation represents a novel posttranslational modification pathway involving succinate.
• Mutations in SDH are linked to pathologies like tumor formation and inflammation.
• Succinate exhibits dual roles, potentially acting as both a pro- and anti-tumor agent.

Conclusions:

• Succinate's functions extend beyond metabolism, impacting anti-cancer immunity.
• Succinate may represent a novel class of inflammatory regulators.
• Understanding succinate's signaling in inflammation is key to advancing cancer and inflammatory disease research.