Tier 3 — preclinical

Sirt6 promotes tumor growth and suppresses immune surveillance

Yan Wang, Yu Song, Xianqin Song, Nanyang Zhang, Kehua Fang, Xiaotian Chang
Cancer Cell International 2026 26(1):20

Bibliography

PubMed
PMID 41530841
PubMed Central
PMC12809971
Funding
Funded by the Huanghai University Scientific Research Foundation, Shandong Provincial Key R&D Program (2023CXPT040), and Science and Technology Projects in Qingdao West Coast New District (2021-3).
Competing interests
The authors declared no competing interests.

Study snapshot

DesignPreclinical tumor-bearing mouse study testing the SIRT6 activator UBCS039 with immune and tumor-growth readouts.
ModelBALB/c-nude mice implanted with multiple human tumor-derived cell lines.
Sample60 five-week-old female BALB/c nude mice were randomized to UBCS039, DMSO or PBS pretreatment groups (20 per group); tumor-cell-line experiments used 5 mice per subgroup and were repeated three times.
InterventionUBCS039 pretreatment versus vehicle controls.
DurationTumor-model dependent.
EndpointsTumor growth; GM-CSF; IL-10; adenosine; NK-cell measures; IFN-gamma; tumor-associated immune polarization

What the study showed, in plain terms

This 2026 paper cuts against a simplistic 'more SIRT6 is always better' narrative. In several nude-mouse tumor models, UBCS039 pretreatment was associated with larger tumors and immune changes consistent with reduced tumor surveillance.

Key findings

The authors reported larger tumors after SIRT6 activation with UBCS039 in their models alongside changes in cytokines and immune-cell biology.

What this study can and cannot tell us

The work used immunodeficient mice and experimental tumor implantation, so it cannot establish cancer risk in humans taking a SIRT6-targeting supplement.

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