• Biomolecules & Therapeutics
• /
• v.27 no.1
• /
• pp.85-91
• /
• 2019

Oxidative stress is considered a major contributor in the pathogenesis of diabetic neuropathy and in diabetes complications, such as nephropathy and cardiovascular diseases. Diabetic neuropathy, which is the most frequent complications of diabetes, affect sensory, motor, and autonomic nerves. This study aimed to investigate whether 7,8-dihydroxyflavone (7,8-DHF) protects SH-SY5Y neuronal cells against high glucose-induced toxicity. In the current study, we found that diabetic patients exhibited higher lipid peroxidation caused by oxidative stress than healthy subjects. 7,8-DHF exhibits superoxide anion and hydroxyl radical scavenging activities. High glucose-induced toxicity severely damaged SH-SY5Y neuronal cells, causing mitochondrial depolarization; however, 7,8-DHF recovered mitochondrial polarization. Furthermore, 7,8-DHF effectively modulated the expression of pro-apoptotic protein (Bax) and anti-apoptotic protein (Bcl-2) under high glucose, thus inhibiting the activation of caspase signaling pathways. These results indicate that 7,8-DHF has antioxidant effects and protects cells from apoptotic cell death induced by high glucose. Thus, 7,8-DHF may be developed into a promising candidate for the treatment of diabetic neuropathy.

• Annals of Clinical Neurophysiology
• /
• v.16 no.1
• /
• pp.8-14
• /
• 2014

Background: Early detection of neuropathy may prevent further progression of this complication in the diabetic patients. The purpose of this study was to evaluate the prevalence of early neuropathic complication in patients with newly diagnosed type 1 and type 2 diabetes. Methods: Nerve conduction studies (median, ulnar, posterior tibial, peroneal, and sural nerves) were performed for 49 type 1 (27 males, mean $14.1{\pm}7.5$ years) and 40 type 2 (27 males, $42.0{\pm}14.1$ years) diabetic patients at onset of diabetes. Children with age at onset under 4 years and adults over 55 years were excluded to eliminate the aging effect and the influence of obstructive arteriosclerosis. Neuropathy was defined as abnormal nerve conduction findings in two or more nerves including the sural nerve. Results: Mean HbA1c level was $12.6{\pm}3.3%$ for type 1 and $10.5{\pm}2.9%$ for type 2 diabetes. The prevalence of neuropathy was 12.2% for type 1, and 35.0% for type 2 diabetes, respectively. There were significant trends in the prevalence of neuropathy with increasing age (p<0.05). The effect of the mean level of glycosylated hemoglobin on the prevalence of polyneuropathy at onset of diabetes was borderline (p=0.0532). Neither sex of the patients nor the type of diabetes affected the neurophysiologic abnormalities at the diagnosis. Conclusions: Even in a population with diabetes at the diagnosis, the prevalence of subclinical neuropathy was not low. Neuropathy has been significantly associated with increasing age indicating the possibility of longer duration of undetected diabetes among them, especially in type 2 diabetes.

• The Korean Journal of Nuclear Medicine
• /
• v.26 no.2
• /
• pp.299-306
• /
• 1992

Gastic emptying scan in diabetic patients is widely used to assess the degree of motility disturbance and the symtoms such as nausea, vomiting, bloating, abdominal pain and early gastric fullness which we can't find anatomic lesion by fiberoscopic or barium study In order to determine the relationship among diabetic gastropathy, neropathy, retinopathy and disease duration, gastric emptying scan using $^{99m}Tc-tin$ colloid labeled scramble egg in hamburger was performed in 10 healty male controls and 50 diabetic patients which were subdivided to no neuropathy, peripheral neuropathy and autonomic neuropathy groups according to the degree of diabetic neuropathy and no retinopathy, background retinopathy and proliferative retinopathy groups according to the degree of diabetic retinopathy. After medication of cisapride for 2 weeks, we observed the presence of improvement of gastric motility in diabetics. The results were as following: 1) In controls, gastric emptying time (GET1/2) was $75{\pm}13.6$ min and 2 hour gastric retension rate (GRR2) was $32{\pm}11.1%$. 2) In diabetics, GET/2 was prolonged more than 2 hours and GRR2 was $58{\pm}23.1%$. According to degree of neuropathy, GET1/2 was prolonged more than 2 hours in all three groups and GRR2 was $54{\pm}24.1%$ in no neuropathy group, $57{\pm}24.3%$ in peripheral neuropathy group and $69{\pm}24.6%$ in autonomic neuropathy group. According to degree of retinopathy, GET1/2 was $110{\pm}23.4$ min in no retinopathy group and prolonged more than 2 hours in other two groups and GRR2 was $45{\pm}21.6%$ in no retinopathy group, $71{\pm}19.7%$ in background retinopathy group and $73{\pm}21.5%$ in proliferative retinopathy group. 3) After cisapride medication for 2 weeks, GET1/2 and GRR2 were improved as $90{\pm}14.6$ min and $40{\pm}13.8%$ (initial GET1/2 and GRR2 were above 2 hours and $61{\pm}15.4%$). We can conclude from above findings that gastropathy in diabetic neuropathy suggesting main underlying factor in motility disorder The degree of retinopathy and disease duration were correlated with severity of gastropathy in diabetics. From the results of gastric emptying scan, we can conclude that cisapride was useful drug for improving diabetic gastropathy and gastric emptying scan was valuable for assessing severity of diabetic gastropathy as non-invasive method.

• Journal of Korean Foot and Ankle Society
• /
• v.11 no.2
• /
• pp.149-153
• /
• 2007

Purpose: To evaluate the possible risk factors of lower extremity amputations in diabetic foot patients. Materials and Methods: The study is based on 37 patients who received lower extremity amputations from April, 1997 to February 2005 due to diabetic foot complications with at least 1 year follow up. As for the control group, 49 diabetes patients who had been treated at the endocrinology department for at least 1 year without any diabetic foot complication were evaluated. As for the possible risk factors, age, gender, duration of diabetes mellitus, body mass index, Hb A1c, blood glucose level, total cholesterol, s-creatinine, C-peptide, smoking, alcohol, hypertension, cardiovascular disease, CVA, retinopathy and neuropathy were investigated. Results: Among the possible risk factors evaluated, age, Hb A1c, smoking, neuropathy and blood glucose level factors showed statistically significant difference between the diabetic amputation and the control group. Conclusion: In reducing the risk of the lower extremity amputations in the diabetic patients due to diabetic foot complications, strict control of blood glucose level and cessation of smoking were found to be utmost important.

• Annals of Clinical Neurophysiology
• /
• v.10 no.1
• /
• pp.33-37
• /
• 2008

Diabetic polyneuropathy (DPN) is the most common form of diabetic neuropathy, and causes a significant morbidity with an impact on the quality of life in the patients with diabetes. Since DPN frequently induces foot deformity and ulceration, which finally leads to foot amputation, the early detection and treatment is very important for the prevention of a permanent structural change. In the early stage of DPN, the diagnostic methods which can evaluate the function or structure of small nerve fibers should be employed because small nerve fibers are first involved in the course of DPN. However, the nerve conduction study cannot reflect the function of the small nerve fibers, and thus, has a definite limitation in the early diagnosis of DPN. For the early detection of DPN, electrodiagnostic data should be interpreted on a clinical context, along with the careful evaluation of the small nerve fiber functions using the tests such as the analysis of intraepidermal nerve fiber density.

• Journal of Haehwa Medicine
• /
• v.13 no.1
• /
• pp.47-59
• /
• 2004

Objectives & Methods: We investigated 28 books to study etiology and pathology of Son-Bal Jeorim. Result and Conclusion 1. The eiology of Son-Bal Jeorim is same as it of Bee Jeung(痺症). 2. Generally speaking, the cause of Bee Jeung was distributed Wind(風), Coldness(寒), Wetness (濕) of meridian. Bee Jeung can be devided into SilBi(實痺) and HeoBi(虛痺). In SilBi(實痺) there are PungHanSeupBi(風寒濕痺) and YeolBi(熱痺). In HeoBi(虛痺), there are GiHyeolHeoBi(氣血虛痺), EumheoBi(陰虛痺) and YangHeoBi(陽虛痺). 3. Son-Bal Jeorim belong to peripheral neuropathy in western medicine. 4. Syndrome of acute motor paralysis with variable disturbance of sensory and autonomic function, subacute sensorymotor paralysis, syndrome of chronic sensorimotor polyneuropathy, neuropathy with mitochondrial disease, syndrome of mononeuropathy or nerve plexusopathy. 5. Peripheral neuropathy is caused by carpal tunnel syndrome, diabetic neuropathy, uremic neuropathy, hepatic neuropathy, hypothyroid neuropathy, hyperthyroid neuropathy, neuropathy due to malnutrition, neuropathy due to toxic material, neuropathy due to drug, paraneoplastic neuropathy, hereditary neuropathy, etc. 6. Cerebral apoplexy, myelopathy, peripheral circulatory disturbance, anxiety syndrome cause symptoms of peripheral neuropathy

• Journal of the Korean Society for Precision Engineering
• /
• v.24 no.1 s.190
• /
• pp.118-125
• /
• 2007

In this study, we analyzed the plantar shear stress and normal pressure in lateral heel diabetic foot patients during walking by using in-shoe local shear stress and plantar pressure measurement systems. The shear force transducer based on the magnetic-resistive principle, was a rigid 3-layer circular disc. Shear transducers were mounted on the locations of four metatarsal heads and heel in the insole. Twelve normal subjects and three diabetic foot patients with diabetic neuropathy in the lateral heel participated in this study. The center of pressure in lateral heel diabetic foot patients moved more medially and directed toward the first, medial to the second metatarsal heads, and the hallux during late stance, making pressure at the medial heel and the second metatarsal head significantly larger than in the normal. Shear stress at the heel changed significantly in early stance and the magnitude of shear stresses in each metatarsal head also changed. Further studies would be very helpful to design foot orthoses in patients with diabetic neuropathy or other diseases.

• Journal of muscle and joint health
• /
• v.17 no.1
• /
• pp.35-46
• /
• 2010

Purpose: The purpose of this study was to test the effect of 12-week Tai Chi exercise on glucose control, peripheral nerve modulation, and perceived health for Type 2 diabetic patients with neuropathy. Methods: A pretest posttest design with a nonequivalent control group, 44 diabetic patients with neuropathy were recruited from an outpatient clinic of a university hospital and assigned into Tai Chi or Control groups. The Tai Chi exercise was based on Tai Chi for Diabetes program developed by Lam (2006) and performed one hour for each session twice a week for 12 weeks. Outcome variables were HbA1c, Michigan Neuropathy Screening Instrument scores and perceived health. A total of 25 patients completed both measures of pretest and posttest. Results: The study participants were 67 years old in average, diagnosed by DM for more than 15 years. Those who participated in 12-week Tai Chi exercise (n=13) significantly improved in HbA1c (t=2.23, p=.035) and perceived health (t=-2.28, p=.032) than the control group (n=12). Conclusion: Tai Chi exercise may improve glucose control and health status in patients with Type II diabetes. Further study with larger sample size would be necessary to confirm the effect of Tai Chi on peripheral nerve modulation.

• Journal of Pharmacopuncture
• /
• v.16 no.3
• /
• pp.7-10
• /
• 2013

Objectives: This study aimed to evaluate the evidence available in the literature for the safety and efficacy of Dioscoreae Rhizoma (DR) for the treatment of peripheral neuropathy. Methods: Literature searches were performed in MEDLINE and three Korean medical databases up to April 2013. All studies evaluating the effects on peripheral neuropathy or the safety of DR monopreparations were considered. Results: Three studies - DR extract per os (po) on diabetic neuropathy in mice, DR extract injection on the peripheral sciatic nerve after crush injury in rats and DR extract injection to patients with peripheral facial paralysis proved that DR treatments were effective for the treatment of nerve injuries. Conclusions: In conclusion, we found the DR has a strong positive potential for the treatment of peripheral neuropathy, but studies addressing direct factors related to the nerve still remain insufficient.

• Journal of Korean Physical Therapy Science
• /
• v.8 no.2
• /
• pp.1033-1038
• /
• 2001

This studies were to investigate the effects of low power Helium-Neon Infra-Red(He-Ne IR) laser on the changes of the chemical components in serum of the peripheral neuropathy in diabetic rats. The twenty one Spraque-Dawley adult male rats were assigned to the 3 groups: the control group(N=7), the diabetic group(n=7) and the laser group(n=7). The diabetic group was induced with a single intravenous injecion of 50mg/kg body weight streptozotocin dissolved to 0.01mol/L citrate buffer, pH 4.5. The experimental1asser group was irradiated low power He-Ne IR laser for 5 minutes every day during 21 days to the diabetic group. The results were as follows: 1. ALT was increased the laser treatment group than the diabetic group. but that was not significant. 2. AST was significantly increased the laser treatment group than the control group and the diabetic group. 3. LDH was significantly decreased the diabetic group and laser treatment group. 4. ALP was significantly increased the diabetic group and laser treatment group. 5. CHOL was significantly decreased the laser treatment group than the diabetic group. 6. TRIG was significantly increased the laser treatment group than the diabetic group. 7. CPK was significantly increased the laser treatment group than the control group and the diabetic group.