Supplementary Fig 5 from Vitamin B6 Competition in the Tumor Microenvironment Hampers Antitumor Functions of NK Cells

He, Chunbo; Wang, Dezhen; Shukla, Surendra K.; Hu, Tuo; Thakur, Ravi; Fu, Xiao; King, Ryan J.; Kollala, Sai Sundeep; Attri, Kuldeep S.; Murthy, Divya; Chaika, Nina V.; Fujii, Yuki; Gonzalez, Daisy; Pacheco, Camila G.; Qiu, Yudong; Singh, Pankaj K.; Locasale, Jason W.; Mehla, Kamiya

doi:10.1158/2159-8290.24988578.v1

cd-23-0334_supplementary_fig_5_suppsf5.pdf (3.08 MB)

Supplementary Fig 5 from Vitamin B6 Competition in the Tumor Microenvironment Hampers Antitumor Functions of NK Cells

journal contribution

posted on 2024-01-12, 08:21 authored by Chunbo He, Dezhen Wang, Surendra K. Shukla, Tuo Hu, Ravi Thakur, Xiao Fu, Ryan J. King, Sai Sundeep Kollala, Kuldeep S. Attri, Divya Murthy, Nina V. Chaika, Yuki Fujii, Daisy Gonzalez, Camila G. Pacheco, Yudong Qiu, Pankaj K. Singh, Jason W. Locasale, Kamiya Mehla

Supplementary Figure S5 shows that VB6 regulates the mobilization of glycogen to promote glycolysis in NK cells upon acute stimulation with target cells.

Funding

National Cancer Institute (NCI)

United States Department of Health and Human Services

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ARTICLE ABSTRACT

Nutritional factors play crucial roles in immune responses. The tumor-caused nutritional deficiencies are known to affect antitumor immunity. Here, we demonstrate that pancreatic ductal adenocarcinoma (PDAC) cells can suppress NK-cell cytotoxicity by restricting the accessibility of vitamin B6 (VB6). PDAC cells actively consume VB6 to support one-carbon metabolism, and thus tumor cell growth, causing VB6 deprivation in the tumor microenvironment. In comparison, NK cells require VB6 for intracellular glycogen breakdown, which serves as a critical energy source for NK-cell activation. VB6 supplementation in combination with one-carbon metabolism blockage effectively diminishes tumor burden in vivo. Our results expand the understanding of the critical role of micronutrients in regulating cancer progression and antitumor immunity, and open new avenues for developing novel therapeutic strategies against PDAC. The nutrient competition among the different tumor microenvironment components drives tumor growth, immune tolerance, and therapeutic resistance. PDAC cells demand a high amount of VB6, thus competitively causing NK-cell dysfunction. Supplying VB6 with blocking VB6-dependent one-carbon metabolism amplifies the NK-cell antitumor immunity and inhibits tumor growth in PDAC models.This article is featured in Selected Articles from This Issue, p. 5