Type 2 diabetes elicits lower nitric oxide, bradykinin concentration and kallikrein activity together with higher DesArg(9)-BK and reduced post-exercise hypotension compared to non-diabetic condition.

Abstract

This study compared the plasma kallikrein activity (PKA), bradykinin concentration (BK), DesArg(9)-BK production, nitric oxide release (NO) and blood pressure (BP) response after moderate-intensity aerobic exercise performed by individuals with and without type 2 diabetes. Ten subjects with type 2 diabetes (T2D) and 10 without type 2 diabetes (ND) underwent three sessions: 1) maximal incremental test on cycle ergometer to determine lactate threshold (LT); 2) 20-min of constant-load exercise on cycle ergometer, at 90% LT and; 3) control session. BP and oxygen uptake were measured at rest and at 15, 30 and 45 min post-exercise. Venous blood samples were collected at 15 and 45 minutes of the recovery period for further analysis of PKA, BK and DesArg(9)-BK. Nitrite plus nitrate (NOx) was analyzed at 15 minutes post exercise. The ND group presented post-exercise hypotension (PEH) of systolic blood pressure and mean arterial pressure on the 90% LT session but T2D group did not. Plasma NOx increased ~24.4% for ND and ~13.8% for T2D group 15 min after the exercise session. Additionally, only ND individuals showed increases in PKA and BK in response to exercise and only T2D group showed increased DesArg(9)-BK production. It was concluded that T2D individuals presented lower PKA, BK and NOx release as well as higher DesArg(9)-BK production and reduced PEH in relation to ND participants after a single exercise session.

• Authors: Herbert Gustavo Simões, Ricardo Yukio Asano, Marcelo Magalhães Sales, Rodrigo Alberto Vieira Browne, Gisela Arsa, Daisy Motta-Santos, Guilherme Morais Puga, Laila Cândida de Jesus Lima, Carmen Sílvia Grubert Campbell, Octavio Luiz Franco
• Journal: PloS one (PLoS One) Vol. 8 Issue 11 Pg. e80348 ( 2013) ISSN: 1932-6203 [Electronic] United States
• PMID: 24265812 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Blood Glucose
• Nitric Oxide
• Plasma Kallikrein
• Bradykinin

Topics

• Blood Glucose
• Blood Pressure
• Bradykinin (analogs & derivatives, blood)
• Case-Control Studies
• Diabetes Mellitus, Type 2 (blood, physiopathology)
• Exercise
• Female
• Humans
• Male
• Nitric Oxide (blood)
• Plasma Kallikrein
• Post-Exercise Hypotension
• Risk Factors