NCT03847779

Microcirculatory Vasomotor Changes in Type 2 Diabetes With Peripheral Neuropathy

Microcirculatory Vasomotor Function in Response to Acute Exercise in Type 2 Diabetes With Peripheral Neuropathy

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 108 (actual)
• Sponsor: University of Avignon · Academic / Other
• Sex: All
• Age: 40 Years – 75 Years
• Healthy volunteers: Accepted

Summary

Microcirculatory flow is subject to cyclic changes under the influence of heart rate, respiration, myogenic activity, neurogenic factors and endothelial factors. Microcirculatory oscillations (vasomotion) contribute significantly to tissue perfusion. Vasomotion analysis allowed to discriminate normoglycemic subjects, prediabetic subjects and diabetic subjects. Furthermore, changes in vasomotion can precede the emergence of global signs of microangiopathy complications in type 2 diabetes. In fact, few studies reported impaired vasomotion in type 2 diabetes with peripheral neuropathy. Vasomotion analysis after vasodilator (6-min walking test and hyperthermia) and after vasoconstrictor (foot lowering) stimulus could be an effective diagnostic tool to sharpen the diagnostic. Objectives and Methodology: to study vasomotion at baseline and after exercise, hyperthermia and foot lowering within 3 groups of patients: diabetic without peripheral neuropathy, diabetic with subclinical peripheral neuropathy and diabetic with peripheral neuropathy and one group of sex- age- and body mass index-matched healthy control subjects. All the subjects will benefit from a clinical, anthropometric, level of physical activity and biological evaluations. Type 2 diabetes participants will benefit from neuropathy evaluation. In addition, cutaneous microcirculation (perfusion and vasomotion) by means of Laser Doppler Flowmetry and Laser Speckle Imaging will be recorded at rest and after different stimuli (exercise, hyperthermia and foot lowering).

Detailed description

All the subjects will benefit from a: * clinical: diabetes duration, treatments * anthropometric: weight, height, BMI * level of physical activity by means of the International Physical Activity Questionary, pedometers and the 6 minutes walking test * biological evaluations: glycemia, HbA1C, lipids, high sensitive C-reactive protein, fibrinogen, 25(OH)D, creatinine, albumine Type 2 diabetes participants will benefit from neuropathy evaluation: sensory tests by means of Semmes-Weinstein monofilament and of Nerve Check, amplitude and velocity sural nerve and neuropathic symptom score (NSS) In addition, cutaneous microcirculation (perfusion and vasomotion) by means of Laser Doppler Flowmetry and Laser Speckle Imaging will be recorded at rest and after different stimuli (exercise, hyperthermia and foot lowering).

Conditions

• Diabetic Neuropathy Peripheral
• Small Vessel Disease of Diabetes Mellitus
• Vasodilation
• Vasoconstriction

Interventions

Type	Name	Description
OTHER	"Rest"	Cutaneous perfusion and vasomotion assessment at rest in supoine position
OTHER	"Exercise"	Cutaneous perfusion and vasomotion assessment after the 6minute-wlaking test
OTHER	"Foot lowering"	Cutaneous perfusion and vasomotion assessment after foot lowering
OTHER	"Hyperthermia"	Cutaneous perfusion and vasomotion assessment during hyperthermia

Timeline

• Start date: 2019-02-04
• Primary completion: 2020-06-30
• Completion: 2020-06-30
• First posted: 2019-02-20
• Last updated: 2020-11-13

Locations

1 site across 1 country: France