Molecular metabolismOct 31, 2026

Removing GIP receptors from excitatory brain cells does not stop GIP receptor blockers from speeding up weight loss caused by GLP-1

GLP-1 Therapies Weekly Brief ↗PubMed ↗DOI ↗

Updated Nov 2, 2026

Abstract

Selective loss of Gipr in glutamatergic neurons may influence the enhancement of GLP-1-induced weight loss.

GIPR antagonism accelerates weight loss when combined with GLP-1R agonism.
GIPR agonism relies on GIPR signaling in GABAergic neurons for weight loss enhancement.
GIPR antagonism does not depend on GIPR signaling in GABAergic neurons.
The enhancement of GLP-1-induced weight loss may be linked to GIPR signal modification in other neuron types.

Simplified

Agonism and antagonism of the glucose-dependent insulinotropic polypeptide receptor (GIPR) accelerate weight loss induced by glucagon-like peptide-1 receptor (GLP-1R) agonism. Recent studies have shown that GIPR antagonism, unlike GIPR agonism, does not rely on GIPR signaling in GABAergic neurons to enhance GLP-1-induced weight loss, suggesting that this effect instead depends on GIPR signal modification in other types of neurons. Accordingly, we here assessed whether selective loss of Gipr in glutamatergic neurons affects the ability of GIPR antagonism to enhance GLP-1-induced weight loss.

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Removing GIP receptors from excitatory brain cells does not stop GIP receptor blockers from speeding up weight loss caused by GLP-1

Abstract

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