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Berberine is an insulin secretagogue targeting the KCNH6 potassium channel

Zhao MM, Lu J, Li S, Wang H, Cao X, Li Q, Shi TT, Matsunaga K, Chen C, Huang H, Izumi T, Yang JK
Nature communications 2021 12(1):5616

Bibliography

PubMed
PMID 34556670
PubMed Central
PMC8460738
Trial registry
View on ClinicalTrials.gov Registered trial — results not yet published in a peer-reviewed journal.
Funding
Supported by Chinese national research programs, the Kobayashi International Scholarship Foundation, an MSD scholarship donation and a Gunma University joint program.
Competing interests
The authors declared no competing interests.

Study snapshot

DesignRandomized double-blind crossover phase I clamp study with preclinical experiments
ModelHuman participants; see population
Sample15 healthy men in the human clamp trial; separate mouse/cell experiments
InterventionSingle-dose berberine versus placebo during a hyperglycemic clamp; KCNH6 experiments
Duration160-minute human clamp; 14-day adverse-event follow-up
EndpointsInsulin and C-peptide during hyperglycemic clamp; KCNH6 channel function; Mouse glucose/insulin responses

What the study showed, in plain terms

The human experiment found increased insulin secretion under induced hyperglycemia, accompanied by cellular and mouse evidence involving KCNH6 channels.

Key findings

  • The human experiment found increased insulin secretion under induced hyperglycemia, accompanied by cellular and mouse evidence involving KCNH6 channels.

What this study can and cannot tell us

Acute clamp physiology in healthy men does not establish long-term diabetes efficacy or absence of hypoglycemia with all drug combinations.

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