Research
Hormonal
Tirzepatide sensitizes leptin signaling in hypothalamic POMC and GLP-1R neurons, increasing POMC neuronal firing by decreasing inhibitory postsynaptic input.
Tirzepatide works in part by making your brain's natural weight-regulating hormones more effective. This leads to reduced hunger and increased energy expenditure, contributing to weight loss.
StrongSupportsHIGH confidence
Tirzepatide sensitized leptin signaling in hypothalamic pro-opiomelanocortin (POMC) and GLP-1R expressing neurons. TZP+Lep synergistically increased POMC neuronal firing by decreasing the inhibitory postsynaptic input.
Why this rating
Strong mechanistic evidence from electrophysiology and immunohistochemistry in mice.
Source
Tirzepatide Synergizes with Leptin on Weight Loss and Restoring Metabolic Homeostasis in Diet-induced Obesity Model
Xun Sun et al. · bioRxiv (Cold Spring Harbor Laboratory) · 2025
DOI 10.64898/2025.12.18.695152
preprint · n=318
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- Combining tirzepatide with leptin produces synergistic weight loss and improved metabolic homeostasis in diet-induced obesity models, driven by reduced food intake and increased energy expenditure.Good
- Higher baseline circulating leptin levels in patients correlate with greater weight loss efficacy when treated with tirzepatide.Good
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