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Updated: Feb 17, 2026

The Sciatic Nerve Cuffing Model of Neuropathic Pain in Mice
Published on: July 16, 2014
Peripheral Leptin Signaling Mediates Formalin-Induced Nociception.
Zhi-Jing Hu1,2, Wei Han2, Chang-Qing Cao2
1Department of Integrative Medicine and Neurobiology, School of Basic Medical Sciences; Institutes of Brain Science, Brain Science Collaborative Innovation Center, State Key Laboratory of Medical Neurobiology, Institute of Acupuncture and Moxibustion, Fudan Institutes of Integrative Medicine, Fudan University, Shanghai, 200032, China.
Obesity does not affect acute thermal pain but reduces inflammatory pain responses. Leptin signaling is impaired in obesity, suggesting leptin receptor pathway interference as a target for acute inflammatory pain relief.
Area of Science:
- Neuroscience
- Metabolism
- Pain Research
Background:
- Obesity is linked to chronic pain, but its effect on acute inflammatory pain remains unclear.
- Understanding this relationship is crucial for developing targeted pain management strategies.
Purpose of the Study:
- To investigate the association between obesity and acute inflammatory pain.
- To explore the role of leptin signaling in obesity-related pain modulation.
Main Methods:
- Utilized a high-fat diet-induced obese mouse model.
- Assessed thermal pain thresholds and formalin-induced inflammatory pain responses.
- Investigated leptin-leptin receptor signaling pathways and effects of pathway blockade.
Main Results:
- Obese mice showed no change in thermal pain but reduced responses to inflammatory pain.
- Leptin signaling was dysmodulated in obese mice.
- Leptin receptor pathway blockade or deficiency decreased inflammatory pain sensitivity.
Conclusions:
- Leptin plays a significant role in acute inflammatory nociception.
- Targeting the leptin-leptin receptor pathway may offer a novel therapeutic approach for acute inflammatory pain.
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