NMN in diabetic β-cells and db/db mice: SIRT6–HIF-1α mitochondrial adaptation
In this abstract, NMN reduced high-glucose mitochondrial injury in INS1 β-cells and improved glucose metabolism and circulating insulin in db/db mice; the described mechanism involves SIRT6–HIF-1α. These are preclinical findings, not evidence of benefit in people. [1]
Automatic summary · not editorially reviewed
The key findings
In the abstract, NMN reduced high-glucose mitochondrial injury in INS1 β-cells, including lower mitochondrial reactive oxygen species, restored membrane potential and higher ATP production. [1]
Long-term NMN administration improved glucose metabolism, increased circulating insulin and preserved pancreatic islet integrity in db/db diabetic mice. [1]
Genetic inhibition of HIF-1α abolished NMN-mediated restoration of glycolytic capacity, mitochondrial homeostasis and cytoprotection. [1]
The source at a glance
- Study type / format
- Preclinical abstract (cell experiments and mouse study)
- Population / context
- INS1 β-cells under high glucose and db/db diabetic mice
- Summary based on
- Study abstract
- Publication status
- Preprint · peer-review status not confirmed
- Original publication
- August 28, 2026
High-glucose INS1 β-cells and db/db mice
The abstract describes cell experiments with INS1 β-cells exposed to high glucose and long-term NMN administration in db/db diabetic mice. It reports that mitochondrial adaptive responses were insufficiently activated during hyperglycemia-induced β-cell stress. In the cells, NMN reduced mitochondrial reactive oxygen species, restored mitochondrial membrane potential and increased ATP production. In the mice, NMN improved glucose metabolism, raised circulating insulin levels and preserved pancreatic islet integrity.
Supporting source [1]
SIRT6–HIF-1α axis and HIF-1α inhibition
According to the abstract, NMN promoted glycolytic metabolic remodeling and mitochondrial stress adaptation through activation of the SIRT6–HIF-1α signaling axis. Genetic inhibition of HIF-1α abolished the NMN-mediated restoration of glycolytic capacity, mitochondrial homeostasis and cytoprotection, which the authors take to indicate that HIF-1α is essential for this adaptation. In diabetic pancreatic tissue, NMN restored SIRT6 expression and enhanced HIF-1α-dependent glycolytic responses.
Supporting source [1]
Abstract-only preclinical scope of the NMN findings
The authors present these results as a previously unrecognized SIRT6–HIF-1α-mediated mitochondrial adaptive pathway behind NMN-related β-cell protection. The evidence comes from INS1 β-cells and db/db mice, so it does not show that NMN prevents β-cell failure or benefits people with type 2 diabetes. Only the abstract was available; the full text was not reviewed, so details such as sample sizes, follow-up and statistical uncertainty are not reported here.
Supporting source [1]
How to interpret this
Abstract only; the full text was not reviewed. Evidence comes from INS1 β-cells and db/db mice, so human benefit is not shown. Sample sizes, follow-up and statistical uncertainty are not reported in the abstract.
Based on the study abstract; the full paper, tables and supplementary data were not reviewed.
Source & supporting passages
Chen Y, Zhou Q, Qi G, Wang Q, Ma C, Gu C, Wang R, Wang M. · europepmc.org · August 28, 2026