NCT05572905

Effect of Acute Bout of Exercise on Levels of PAHSA

Novel Approaches to Enhance Insulin-sensitizing Effects of Exercise: Targeting PAHSA Metabolism

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 60 (actual)
• Sponsor: Lenka Rossmeislova · Academic / Other
• Sex: All
• Age: 25 Years – 80 Years
• Healthy volunteers: Accepted

Summary

Exercise represents an important tool in the prevention and treatment of metabolic disorders associated with obesity and aging, such as type 2 diabetes and cardiovascular disease. Besides skeletal muscle and its myokinins, the metabolic effects of exercise also rely on the induction of favorable changes in adipose tissue function. For example, adipose tissue is a source of lipokinins from the family of palmitic acid esters of hydroxy fatty acids (PAHSA), which have anti-inflammatory and insulin-sensitizing properties. We have recently shown that 4 months of exercise training increases PAHSA levels in adipose tissue and circulation. However, the mechanisms involved in the induction of PAHSA levels in response to exercise are unknown. The aim of the Effect of Acute Bout of Exercise on Levels of PAHSA (ETAPA) project is therefore to investigate the regulation of PAHSA metabolism in response to both acute and chronic exercise. To achieve this goal, we will employ state-of-the-art analytical methods to measure PAHSA levels in both adipose tissue and circulation of subjects of various ages and adiposity status. The main output of the ETAPA project will be the proof of principle regarding the important role of PAHSA lipokinins in exercise-induced enhancement of insulin sensitivity and the identification of potential drug targets that could be used to further improve PAHSA metabolism for the treatment of metabolic disorders associated with aging or obesity.

Conditions

• Insulin Sensitivity

Interventions

Type	Name	Description
OTHER	Exercise	Patients after overnight fast will cycle on ergo-meter for 60 minutes. No per-oral food intake will be allowed during the test. Level of the intensity of exercise will be determined as individual range of heart frequency (HF), oxygen consumption (VO2) and respiratory quotient (RQ) just bellow the aerobic threshold of the given participant (close to anticipated fatmax). These values will be obtained during maximal capacity stress test on cyclo-ergo-meter. This maximum stress test will be performed at least one week prior to the 60 minutes exercise to eliminate potential carry-over effect. Power output will be modulated during the 60 minutes of exercise to ensure keeping participants values of HF, RQ and VO2 in the given range. Blood will be sampled at 5 time points with interval of 30 minutes during the exercise (0, 30, 60, 90, 120) and 24 hours post-exercise.
OTHER	Fasting control	The same participants will be monitored while resting for 120 minutes in calm environment. No peroral food intake will be allowed during the test. Fasting control will take place at least one week apart of the exercise. Blood will be sampled at 5 timepoints with interval of 30 minutes during the exercise (0, 30, 60, 90, 120) and 24 hours post-control.

Timeline

• Start date: 2021-05-01
• Primary completion: 2025-12-12
• Completion: 2025-12-12
• First posted: 2022-10-10
• Last updated: 2025-12-19

Locations

1 site across 1 country: Czechia