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Updated: Jan 31, 2026
06:47
A Murine Model of Vertical Sleeve Gastrectomy
Published on: December 18, 2017
11.7K
Vertical sleeve gastrectomy improves ventilatory drive through a leptin-dependent mechanism
Deanna M Arble1,2, Alan R Schwartz3, Vsevolod Y Polotsky3
1Department of Biological Sciences, Marquette University, Milwaukee, Wisconsin, USA.
JCI Insight
|January 11, 2019
Summary
Vertical sleeve gastrectomy (VSG) improves breathing in obesity hypoventilation syndrome (OHS) by acting on leptin signaling, not just weight loss. This suggests physiological changes, not mechanical load, drive OHS.
Area of Science:
- Physiology
- Endocrinology
- Pulmonology
Background:
- Obesity hypoventilation syndrome (OHS) involves hypercapnia and reduced chemosensitivity.
- Vertical sleeve gastrectomy (VSG) improves OHS, but the mechanism (weight loss vs. metabolic changes) is unclear.
Purpose of the Study:
- To determine if VSG's ventilatory benefits are weight-dependent or mediated by metabolic changes.
- To investigate the role of leptin in VSG-induced improvements in hypercapnic ventilatory response (HCVR).
Main Methods:
- Preclinical mouse models were used to assess the effects of VSG.
- Hypercapnic ventilatory response (HCVR), body mass, fat mass, caloric intake, and leptin levels were measured.
- Experiments were conducted in the presence and absence of leptin (ob/ob mice).
Main Results:
- VSG improved HCVR and reduced leptin levels independently of weight loss.
- In leptin-deficient mice, VSG improved metabolic parameters but not HCVR.
- Leptin administration restored HCVR in ob/ob mice.
Conclusions:
- VSG improves chemosensitivity and ventilatory drive through a leptin-dependent pathway.
- These findings shift focus from mechanical load to physiological factors like leptin signaling in OHS pathogenesis.
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