The Axon Protective Effects of Syringic Acid on Ischemia/Reperfusion Injury in a Rat Sciatic Nerve Model.

AIM: In the relevant literature, there is no experimental study that investigated the axon protective effects of syringic acid- a polyphenol compound- with an anti-oxidant capacity on ischemia/reperfusion injury. MATERIAL AND METHODS: The rats were randomly divided into four groups: Control group (no medication or surgical procedure), Sham group, Syringic acid group, and Methyprednisolone (MP) Group. Ischemia was achieved by abdominal aorta clamping and all animals were sacrificed 24 hours after ischemia. Harvested sciatic nerve segments were investigated histopathologically and for tissue biochemistry. RESULTS: Ischemic fiber degeneration scores were found significantly lower in syringic acid and MP groups than sham group. Additionally, apoptosis-related cysteine peptidase caspase-3 immunostaining scores were lower in syringic acid and MP groups. Biochemically, superoxide dismutase and nuclear respiratory factor 1 values were significantly higher in syringic acid group compared to those of control and sham groups while malondialdehyde levels were significantly lower in the syringic acid group. CONCLUSION: Syringic acid reduces oxidative stress and axonal degeneration in rat sciatic nerve after ischemia/reperfusion injury. Therefore, syringic acid may play a role in the treatment of peripheral nerve injuries due to ischemia/reperfusion.

Relationship between restless leg syndrome and quality of life in uremic patients.

OBJECTIVES: Patients with RLS suffer nonrestorative sleep, daytime sleepiness, fatigue, and concentration problems. In addition, dialysis itself effects the psychological and social life of the patient negatively. The aim of this study was to determine the prevalence of RLS in patients on regular hemodialysis, and its relationship with patients' quality of life, socio-demographic and laboratory data. METHODS: One hundred and eighteen stable chronic hemodialysis (HD) patients referring to the hemodialysis unit of Turkish Kidney Foundation and 49 patients that met IRLSSG diagnostic criteria were included into the study. IRLSSG Diagnostic Criteria and International Restless Leg Syndrome rating scale were used as a guideline to diagnose and evaluate the severity of RLS. Short form-36 health survey was used to evaluate the quality of life. For statistical analysis, the "SPSS for Windows" package program was used. RESULTS: A total of forty-nine patients, of whom 26 were female and 23 were male, that met IRLSSG diagnostic criteria were included into the study. Mean age of the patients was 61.35 ± 13.17 years. There was a negative correlation between the IRLSS score and SF36 Physical Score, Mental Score and Total Score, respectively (p=0.018 r=-0.351, p=0.01 r=-0.380, p=0.00 r=-0.499). There was no significant correlation between the IRLSS score and dialysis duration, blood ferritin and parathyroid hormone and other comorbid diseases. CONCLUSION: RLS is a common distressing problem in patients with ESRD, which negatively impacts functional health status. Clinicians should be aware of the symptoms of RLS to decrease morbidities related with quality of life.

Primary multiple cerebral hydatid disease: still symptomatic despite pathologically confirmed death of the cyst.

Hydatid disease is a life-threatening parasitic infestation caused by Echinococcus granulosus. Infection with E. granulosus typically results in the formation of hydatid cysts in liver, lungs, kidney and spleen. Majority of the intracranial cysts are secondary and solitary. Multiple primary cerebral cysts are uncommon. Surgical and medical management of a 14-year-old boy with multiple primary hydatid cysts are presented. 14 cysts, which were symptomatic due to their mass effect, were surgically removed, whereas a deep-seated asymptomatic cyst was followed-up with medical treatment. Despite proper antibiotic regimen the patient was admitted with epileptic seizures six months later. The deep-seated lesion was also surgically removed. Intraoperative observations and pathological examination demonstrated different characteristics, with pericystic gliosis, gel-like cyst content and death scolices within the cavity. In addition to the fact, that the presented case is an additional example for the rare primary multiple cerebral hydatid cysts, to our knowledge it is the first case of a dead cerebral hydatid cyst, causing symptoms despite effective medical treatment.

Doxorubicin for prevention of epineurial fibrosis in a rat sciatic nerve model: outcome based on gross postsurgical, histopathological, and ultrastructural findings.

OBJECT: Epineural fibrosis may complicate peripheral nerve surgeries and currently is considered as one of the main factors responsible for failed surgeries. The authors investigated the postoperative antiscarring effects of topically applied doxorubicin (DXR) on rat sciatic nerves. METHODS: The sciatic nerves were dissected from the surrounding tissue and exposed bilaterally in 20 Wistar albino adult male rats. Abrasion trauma was produced on the exposed surface of the biceps femoris muscle in the vicinity of the sciatic nerves and their main branches in all animals. In the DXR Group, cottonoid pads soaked with DXR (0.5 mg/ml) were placed around the nerves for 5 minutes, whereas cotton pads soaked with saline (0.9% NaCl) were applied to nerves of animals in the Control Group for the same duration. Twelve weeks after the procedure, all of the rats were killed and the sciatic nerves were examined. Epineural adhesions were evaluated histopathologically and ultrastructurally. Additionally, quantitative histological parameters, the scar tissue formation index and the scar density, were calculated in histological evaluation. RESULTS: Gross postsurgical evaluation as well as histopathological and electron microscopic examination of involved nerve segments showed significantly less epineurial adhesions in the DXR Group than in the Control Group. Quantitative analysis of the epineurium revealed a statistically significant reduction in the density and amount of epineural scarring in specimens from the DXR Group than in those from the Control Group. CONCLUSIONS: The results of gross postsurgical anatomical evaluation and histopathological and ultrastructural studies suggested that topical application of DXR effectively reduced epineural scar formation on rat sciatic nerves. These promising findings merit further experimental and clinical studies to determine the efficacy and safe applicability of DXR in human subjects.