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2022 Fiscal Year Final Research Report

Restriction of dietary vitamin reveals metabolic vulnerability of small cell lung cancer

Research Project

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Project/Area Number 20K17203
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 53030:Respiratory medicine-related
Research InstitutionMiyagi Prefectural Hospital Organization Miyagi Cancer Center

Principal Investigator

Morita Mami  地方独立行政法人宮城県立病院機構宮城県立がんセンター(研究所), がん薬物療法研究部, 共同研究員 (20647193)

Project Period (FY) 2020-04-01 – 2023-03-31
Keywords肺がん / 代謝 / NAD
Outline of Final Research Achievements

NAD metabolism has long been expected to be developed as a therapeutic target for cancer, but there have been several obstacles. In this study, we investigated the therapeutic potential of interference with NAD synthesis in small cell lung cancer (SCLC), which is highly dependent on NAD synthesis. Using a novel NAD synthesis inhibitor with favorable pharmacokinetics, we demonstrated a high therapeutic efficacy of NAD-targeted therapy for small cell lung cancer (SCLC) in a mouse preclinical model. We concluded that this treatment including dietary restriction would be feasible in clinic.

Free Research Field

呼吸器内科学関連

Academic Significance and Societal Importance of the Research Achievements

SCLCは肺がんの15-20%を占める高転移性の難治がんで、その治療は、この~20年根本的な進歩がない。理由の1つに、創薬可能なドライバー遺伝子変異がSCLCには存在しないことがあげられる。本研究では、NAMPT阻害剤とナイアシン摂取制限の併用治療のSCLCに対する非常に高い治療効果を動物実験にて確認した。この治療はSCLCのようながんに対して非常に選択性の高い治療であることが示唆された。必要となる食事制限期間も当初想定よりも短くて十分であることが確認できた。今後は、SCLC以外の神経内分泌分化を呈するがん種にも応用可能かを検討していく。

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Published: 2024-01-30  

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