Association of Small Fiber Function with Microvascular Perfusion of Peripheral Nerves in Patients with Type 2 Diabetes : Study using Quantitative Sensory Testing and Magnetic Resonance Neurography.
Clin Neuroradiol
; 34(1): 55-66, 2024 Mar.
Article
em En
| MEDLINE
| ID: mdl-37548682
ABSTRACT
INTRODUCTION/AIMS:
Diabetic small fiber neuropathy (SFN) is caused by damage to thinly myelinated Afibers (δ) and unmyelinated Cfibers. This study aimed to assess associations between quantitative sensory testing (QST) and parameters of peripheral nerve perfusion obtained from dynamic contrast enhanced (DCE) magnetic resonance neurography (MRN) in type 2 diabetes patients with and without SFN.METHODS:
A total of 18 patients with type 2 diabetes (T2D, 8 with SFN, 10 without SFN) and 10 healthy controls (HC) took part in this cross-sectional single-center study and underwent QST of the right leg and DCE-MRN of the right thigh with subsequent calculation of the sciatic nerve constant of capillary permeability (Ktrans), extravascular extracellular volume fraction (Ve), and plasma volume fraction (Vp).RESULTS:
The Ktrans (HC 0.031â¯min-1⯱ 0.009, T2D 0.043â¯min-1⯱ 0.015; pâ¯= 0.033) and Ve (HC 1.2%⯱ 1.5, T2D 4.1%⯱ 5.1; pâ¯= 0.027) were lower in T2D patients compared to controls. In T2D patients, compound zscores of thermal and mechanical detection correlated with Ktrans (râ¯= 0.73; pâ¯= 0.001, and râ¯= 0.57; pâ¯= 0.018, respectively) and Ve (râ¯= 0.67; pâ¯= 0.002, and râ¯= 0.69; pâ¯= 0.003, respectively). Compound zscores of thermal pain and Vp (râ¯= -0.57; pâ¯= 0.015) correlated negatively.DISCUSSION:
The findings suggest that parameters of peripheral nerve microcirculation are related to different symptoms in SFN A reduced capillary permeability may result in a loss of function related to insufficient nutritional supply, whereas increased capillary permeability may be accompanied by painful symptoms related to a gain of function.Palavras-chave
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Base de dados:
MEDLINE
Assunto principal:
Diabetes Mellitus Tipo 2
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article