- ICH GCP
- Registro de ensayos clínicos de EE. UU.
- Ensayo clínico NCT00155142
Changes in Skin Innervation of Neurologically Asymptomatic Type 2 Diabetic Patients: the Correlation With the Diabetic Parameters and Neurotrophins.
Descripción general del estudio
Estado
Condiciones
Descripción detallada
Type 2 diabetes is one of the most common disorders in general population. The overall prevalence of type 2 diabetes among people older than 40 years old in Taiwan is about 10 %. Various complications are associated with diabetes and these complications have become an important issue in daily clinical practice.
Neuropathy is one of the most frequent symptomatic complications of diabetes and is potentially devastating. Small-fiber neuropathy is a major component of diabetic neuropathies and usually causes disabling symptoms like pain and burning. It typically begins at the distal limbs and progresses to the proximal part with time. Recent studies have indicated that skin innervation is reduced in neurologically symptomatic type 2 diabetic patients and the reduction is correlated with the duration of diabetes1. It is not clear whether similar changes occur in neurologically asymptomatic type 2 diabetes. Neurovascular disturbance (i.e. decreased skin blood flow) was noted in early and clinically silent diabetic patients and it might represent the functional and organic abnormalities in small unmyelinated C fibers. Along the same line it is reasonable to speculate that there might be changes in the skin innervation in the preclinical phase of diabetic neuropathic patients. No previous studies have investigated the course of the changes in skin innervation from early or asymptomatic stage to symptomatic stage in diabetic patients.
The relationship of diabetes and the occurrence of peripheral neuropathy had been studied by the Diabetes Control and Complications Trial Research Group and the Kumamoto study in type 1 or 2 diabetes respectively. The results showed that intensive control of hyperglycemia could prevent or delay the development of diabetic neuropathy. However the neuropathies in the studies were assessed by nerve conduction studies. These examinations are insensitive to the small fiber degeneration and it is not clear whether small fibers changes during intensive diabetic control. There is also lack of direct pathogenic evidence regarding the effects of diabetic control on the development of small fiber degeneration.
Neurotrophins are a gene family of structurally related proteins that is released by target tissues of responsive peripheral nerves, binds to specific receptors, and regulates gene expression through the actions of second-messenger systems. Each member of the family has its selectively tropical effects on peripheral nerves and plays a role in promoting neurite outgrowth, inducing morphological differentiation, stimulating expression and release of neurotransmitters and promoting nerve regeneration. It is hypothesized that abnormal availability of neurotrophins is involved in the pathogenesis of diabetic neuropathy. Studies have showed reduced seral level of neurotrophins in diabetic patients but it is not clear whether the impact of this finding on the diabetic neuropathy. There have no studies demonstrating if nay correlation between abnormal neurotrophins expression and the pathogenesis of small fiber neuropathy in diabetic patients.
Skin biopsy with quantification of intraepidermal nerve fibers (IENF) is a new pathological approach to study small fiber sensory neuropathy. By applying this technique with enzyme linked immunosorbent assay, we will clarify the following issues:
- Changes in skin innervation of neurologically asymptomatic type 2 diabetic patient.
- The influence of diabetic control on the development of small fiber neuropathy.
- The effect of neurotrophins on the pathogenesis of small fiber neuropathy.
Tipo de estudio
Inscripción
Contactos y Ubicaciones
Estudio Contacto
- Nombre: Sung-Tsang Hsieh, PhD
- Número de teléfono: 8182 886-2-23123456
- Correo electrónico: sthsieh@ha.mc.ntu.edu.tw
Ubicaciones de estudio
-
-
-
Taipei, Taiwán
- Reclutamiento
- Department of Anatomy and Cell Biology, National Taiwan University College of Medicine
-
Contacto:
- Sung-Tsang Hsieh, PhD
- Número de teléfono: 8182 886-2-23123456
- Correo electrónico: sthsieh@ha.mc.ntu.edu.tw
-
-
Criterios de participación
Criterio de elegibilidad
Edades elegibles para estudiar
Acepta Voluntarios Saludables
Géneros elegibles para el estudio
Descripción
Inclusion Criteria:
- (1) patients fulfilling the diagnosis of type 2 diabetes mellitus19 and receiving oral hyperglycemic agent or insulin treatment with regular follow-up at outpatient clinics, (2) neurologically asymptomatic, i.e. absence of subjective motor or sensory symptom, and absence of motor or sensory sign on neurological examinations, (3) absence of renal impairment or other systemic disease, (4) absence of bleeding tendency, obvious limb edema, poor cardiopulmonary function, acute symptoms of poor diabetic control or any other contraindication for skin biopsy.
Exclusion Criteria:
- Use of anti-coagulant; any causes with bleeding tendency; moderate to severe limb edema; history of poor wound healing; poor hygiene and poor care patients; uremia under dialysis.
Plan de estudios
¿Cómo está diseñado el estudio?
Detalles de diseño
Colaboradores e Investigadores
Patrocinador
Investigadores
- Director de estudio: Sung-Tsang Hsieh, PhD, Department of Anatomy and Cell Biology, National Taiwan University College of Medicine; Department of Neurology, National Taiwan University Hospital.
Fechas de registro del estudio
Fechas importantes del estudio
Inicio del estudio
Fechas de registro del estudio
Enviado por primera vez
Primero enviado que cumplió con los criterios de control de calidad
Publicado por primera vez (Estimar)
Actualizaciones de registros de estudio
Última actualización publicada (Estimar)
Última actualización enviada que cumplió con los criterios de control de calidad
Última verificación
Más información
Términos relacionados con este estudio
Otros números de identificación del estudio
- 9361701104
Esta información se obtuvo directamente del sitio web clinicaltrials.gov sin cambios. Si tiene alguna solicitud para cambiar, eliminar o actualizar los detalles de su estudio, comuníquese con register@clinicaltrials.gov. Tan pronto como se implemente un cambio en clinicaltrials.gov, también se actualizará automáticamente en nuestro sitio web. .
Ensayos clínicos sobre Diabetes mellitus
-
Meir Medical CenterTerminadoDiabetes mellitus tipo 2 | Diabetes Mellitus, No Insulino Dependiente | Diabetes Mellitus, sobre Tratamiento Hipoglucemiante Oral | Diabetes mellitus tipo adultoIsrael
-
Medical College of WisconsinMedical University of South CarolinaTerminadoDiabetes mellitus | Diabetes mellitus tipo 2 | Diabetes mellitus de inicio en adultos | Diabetes mellitus no insulinodependiente | Diabetes mellitus no insulinodependiente, tipo IIEstados Unidos
-
University of Colorado, DenverMassachusetts General Hospital; Beta Bionics, Inc.TerminadoDiabetes Mellitus, Tipo 1 | Diabetes tipo 1 | Diabetes tipo 1 | Diabetes mellitus tipo 1 | Diabetes autoinmune | Diabetes Mellitus, Insulino-Dependiente | Diabetes de inicio juvenil | Diabetes Autoinmune | Diabetes mellitus insulinodependiente 1 | Diabetes Mellitus, Insulino-Dependiente, 1 | Diabetes Mellitus... y otras condicionesEstados Unidos
-
SanofiTerminadoDiabetes Mellitus Tipo 1-Diabetes Mellitus Tipo 2Hungría, Federación Rusa, Alemania, Polonia, Japón, Estados Unidos, Finlandia
-
Guang NingReclutamientoDiabetes mellitus tipo 2 | Diabetes mellitus tipo 1 | Diabetes monogenética | Diabetes pancreatogénica | Diabetes mellitus inducida por fármacos | Otras formas de diabetes mellitusPorcelana
-
Hoffmann-La RocheRoche DiagnosticsTerminadoDiabetes Mellitus Tipo 2, Diabetes Mellitus Tipo 1Alemania
-
Medical College of WisconsinMedical University of South Carolina; National Institute of Diabetes and Digestive...Activo, no reclutandoDiabetes Mellitus, Tipo 2 | Diabetes Mellitus, Tipo II | Diabetes mellitus, inicio en adultos | Diabetes mellitus, no insulinodependiente | Diabetes Mellitus, No Insulino DependienteEstados Unidos
-
Medical College of WisconsinNational Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)TerminadoDiabetes Mellitus, Tipo 2 | Diabetes Mellitus, Tipo II | Diabetes mellitus, inicio en adultos | Diabetes mellitus, no insulinodependiente | Diabetes Mellitus, No Insulino DependienteEstados Unidos
-
Medical University of South CarolinaNational Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)TerminadoDiabetes Mellitus, Tipo 2 | Diabetes Mellitus, Tipo II | Diabetes mellitus, inicio en adultos | Diabetes mellitus, no insulinodependiente | Diabetes Mellitus, No Insulino DependienteEstados Unidos
-
University of California, San FranciscoJuvenile Diabetes Research FoundationTerminadoDiabetes mellitus tipo 1 | Diabetes Mellitus, Tipo I | Diabetes mellitus insulinodependiente 1 | Diabetes Mellitus, Insulino-Dependiente, 1 | IDDMEstados Unidos, Australia