Tier 3 — preclinical

Glycine-GLRA1-calmodulin signaling regulates endoplasmic reticulum calcium to sustain insulin secretion and β-cell function

Zhang J, Cao Z, Yang J, Zhu K, Liu S, Liu W, Lu J, Zhao H, Dai W, Chang C, Ye H, Du X, Wang Q, Jiang B, Wang S, Jin L, Zhao T, Li P, Vidal-Puig A, Zheng Y, Shi L, Huang L
Life metabolism 2026 5(2):loaf044

Bibliography

PubMed
PMID 42037784
PubMed Central
PMC13110115
DOI
10.1093/lifemeta/loaf044
Funding
No dedicated funding statement was identified in the retrieved full text; this does not establish absence of funding.
Competing interests
Three authors disclosed editorial roles at the journal and were excluded from editorial decisions on the manuscript.

Study snapshot

DesignHuman association/genetic analyses with animal experiments
ModelMouse beta-cell models and human genetic/transcriptomic analyses
SampleMouse genetic/dietary experiments and human genetic/transcriptomic datasets; n varies
InterventionGlycine availability, Shmt2 expression and beta-cell Glra1 perturbation
DurationModel-specific experimental periods
EndpointsInsulin secretion; ER calcium; Beta-cell survival; Human glycemic genetic traits

What the study showed, in plain terms

This study identifies a glycine-receptor and calcium-signaling mechanism relevant to beta-cell function. Its human component is genetic/transcriptomic, not a therapeutic glycine trial.

Key findings

  • Glycine deficiency and beta-cell Glra1 deletion impaired selected beta-cell outcomes in models.
  • Human analyses associated GLRA1 with glycemic traits.

What this study can and cannot tell us

A plausible receptor pathway does not establish that oral glycine treats diabetes.

Genetic manipulation, deficiency models and supplementation answer different questions.

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Glycine metabolism in animals and humans: implications for nutrition and health
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Glycine Metabolism and Its Alterations in Obesity and Metabolic Diseases
Alves A et al. · Nutrients · 2019
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Insulin resistance and glycine metabolism in humans
Adeva-Andany M et al. · Amino acids · 2018
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Alterations in glycine metabolism in obesity and chronic metabolic diseases - an update on new advances
Alves A et al. · Current opinion in clinical nutrition and metabolic care · 2023
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Glycine as a conditionally essential amino acid and its relationship to l-serine
Holeček M et al. · Metabolism: clinical and experimental · 2025

Editorial review

Reviewed by the Biohack Blueprint research team

Last verified

Dr. Khaled Mahmoud, MBBChCritical Care Medicine, Longevity Science & Editorial Direction