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Review
. 2024 Jul:371:273-287.
doi: 10.1016/j.jconrel.2024.05.042. Epub 2024 Jun 1.

A next-generation STING agonist MSA-2: From mechanism to application

Junhan Yang  1 , Zhenyu Luo  2 , Jingyi Ma  1 , Yi Wang  2 , Ningtao Cheng  3
Affiliations
Review

A next-generation STING agonist MSA-2: From mechanism to application

Junhan Yang et al. J Control Release. 2024 Jul.

Abstract

The stimulator of interferon genes (STING) connects the innate and adaptive immune system and plays a significant role in antitumor immunity. Over the past decades, endogenous and CDN-derived STING agonists have been a hot topic in the research of cancer immunotherapies. However, these STING agonists are either in infancy with limited biological effects or have failed in clinical trials. In 2020, a non-nucleotide STING agonist MSA-2 was identified, which exhibited satisfactory antitumor effects in animal studies and is amenable to oral administration. Due to its distinctive binding mode and enhanced bioavailability, there have been accumulating interests and an array of studies on MSA-2 and its derivatives, spanning its structure-activity relationship, delivery systems, applications in combination therapies, etc. Here, we provide a comprehensive review of MSA-2 and interventional strategies based on this family of STING agonists to help more researchers extend the investigation on MSA-2 in the future.

Keywords: Cancer immunotherapy; Drug delivery; MSA-2; STING agonists; cGAS-STING pathway.

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Conflict of interest statement

Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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