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Potential use of Corneal confocal microscopy in the diagnosis of Parkinson's disease associated neuropathy

Translational Neurodegeneration 2020年第3期9卷 344-353页

作者： Ning-Ning Che Hong-Qi Yang Department of Neurology Henan Provincial People's HospitalSchool of Clinical MedicineHenan UniversityZhengzhou 450003China Department of Neurology People's Hospital of Zhengzhou UniversitySchool of Clinical MedicineZhengzhou UniversityZhengzhou 450003China

Parkinson's disease(PD)is a chronic,progressive neurodegenerative disease affecting about 2%-3% of population above the age of 65.In recent years,Parkinson's research has mainly focused on motor and non-motor symptoms while there are limited studies on neurodegeneration which is associated with balance problems and increased incidence of falls.Corneal confocal microscopy(CCM)is a real-time,non-invasive,in vivo ophthalmic imaging technique for quantifying nerve damage in peripheral neuropathies and central neurodegenerative disorders.CCM has shown significantly lower corneal nerve fiber density(CNFD)in patients with PD compared to healthy controls.Reduced CNFD is associated with decreased intraepidermal nerve fiber density in PD.This review provides an overview of the ability of CCM to detect nerve damage associated with PD.

关键词： Parkinson's disease Peripheral neuropathy Corneal confocal microscopy Small fiber neuropathy

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Relationship between time in range and corneal nerve fiber loss in asymptomatic patients with type 2 diabetes

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Chinese Medical Journal 2022年第16期135卷 1978-1985页

作者： Wejing Zhao Jingyi Lu Lei Zhang Wei Lu Wei Zhu Yuqian Bao Jjian Zhou 'Department of Endocrinology and Metabolism Shanghai Jiao Tong Universty Ailatede Sith People's HospitalShanghai Cinical Center for DiabetesShanghai Key Clinical Center for Metabolic DiseaseShanghai Diabetes IstuteShanghai Key Laboratory of Diabetes MellitusShanghai 200233China Shanghai Clinical Center for Metabolic Diseases Shanghai Key Laboratory of Diabetes MeliusShanghai Diabetes IstituteShanghai Jiao Tong University Alilatedae Sith People's HospitalShanghai 200233China Department of Endocrinology and Metabolism Jinshan Branch of Shanghai Jiao Tong University Aflatedae Sixth People's HospitalShanghai 201500China

Background: Corneal confocal microscopy (CCM) is a noninvasive technique to detect early nerve damage of diabetic sensorimotor polyneuropathy (DSPN). Time in range (TIR) is an emerging metric of glycemic control which was reported to be associated with diabetic complications. We sought to explore the relationship between TIR and corneal nerve parameters in asymptomatic patients with type 2 diabetes (T2DM).Methods: In this cross-sectional study, 206 asymptomatic inpatients with T2DM were recruited. After 7 days of continuous glucose monitoring, the TIR was calculated as the percentage of time in the glucose range of 3.9 to 10.0 mmol/L. CCM was performed to determine corneal nerve fiber density, corneal nerve branch density, and corneal nerve fiber length (CNFL). Abnormal CNFL was defined as ≤15.30 mm/mm2.Results: Abnormal CNFL was found in 30.6% (63/206) of asymptomatic subjects. Linear regression analyses revealed that TIR was positively correlated with CCM parameters both in the crude and adjusted models (all Pcorneal nerve fiber parameters increased significantly (allP for trend corneal nerve fiber loss in asymptomatic T2DM patients. TIR may be a useful surrogate marker for early diagnosis of DSPN.

关键词： Continuous glucose monitoring Corneal confocal microscopy Time in range Type 2 diabetes

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