Alpha-lipoic acid could be a promising treatment in steroid-induced osteonecrosis.

OBJECTIVE: Glucocorticoid-induced osteonecrosis is a serious debilitating health problem. In the present study, we investigated the effects of alpha-lipoic acid on glucocorticoid-induced osteonecrosis in rats. MATERIALS AND METHODS: A total of 40 male Wistar albino rats were equally assigned to 4 groups as control, methylprednisolone acetate (MPA), alpha-lipoic acid (ALA), and methylprednisolone acetate with alpha-lipoic acid (MPA+ALA). The animals in MPA group subcutaneously received 15 mg/kg/week for 2 weeks, whereas 100 mg/kg/day alpha-lipoic acid was intraperitoneal administered for 4 weeks to ALA group. The MPA+ALA group was subjected to both treatments in same doses. Osteonecrosis was confirmed and graded histologically. The serum concentrations of glucose, total cholesterol, low- and high-density lipoprotein, triglyceride, as well as the total oxidant and antioxidant status, oxidative stress index, prothrombin time and activated partial thromboplastin time were evaluated. Also, lipid peroxidation and DNA damage were immunohistochemically assessed in the bone. RESULTS: Osteonecrotic lesions were narrower in the MPA+ALA group than in the MPA group (p<0.05). As compared to the controls, the biochemical parameters in MPA and MPA+ALA groups were significantly increased (p<0.001). The oxidative stress index was significantly higher in the groups with MPA than the controls (p=0.002), but the animals treated with ALA alongside MPA displayed lesser scores than the ones injected with solely MPA (p=0.03). The administration of MPA elevated lipid peroxidation and DNA damage, which were successfully alleviated by ALA. CONCLUSIONS: Alpha-lipoic acid may be suggested to be a protective supplement in glucocorticoid-induced osteonecrosis in rats. The antioxidant capacity of alpha-lipoic acid may involve its beneficial effects.

Frequency of neuropathic pain in patients with shoulder pain.

OBJECTIVE: Shoulder pain is one of the most common musculoskeletal disorders in general population. Although shoulder pain is completely resolved within one year after treatment in more patients, persistent pain is observed in remaining patients. Neuropathic pain may play a role in persistent shoulder pain in some patients. The aim of the study was to investigate the neuropathic pain component in patients with shoulder pain. PATIENTS AND METHODS: 49 patients with shoulder pain were enrolled in this study. The Pain-Detect questionnaire was used to determine the presence of neuropathic pain. Visual analogue scale (VAS) was used to evaluate shoulder pain. Quick Disabilities of the Arm, Shoulder and Hand (Quick-Dash) was used to determine to measure physical function and symptoms. RESULTS: The neuropathic pain component in patients with shoulder pain was 20% and possible neuropathic pain was 19% according to Pain-Detect questionnaire. The mean VAS score, Quick-Dash score and symptom duration were significantly higher in the neuropathic pain group. CONCLUSIONS: The patients with shoulder pain have a neuropathic pain component. We suggest that neuropathic pain should be assessed when prescribing treatment programs in patients with shoulder pain.

Psychological defensive profile of sciatica patients with neuropathic pain and its relationship to quality of life.

AIM: To identify differences between defense styles and mechanisms in sciatica patients with or without neuropathic pain and their relationship to quality of life. STUDY DESIGN: The study included 37 sciatica patients with neuropathic pain (SNP), 36 sciatica patients without neuropathic pain and 38 healthy subjects. Pain severity was measured using the Visual Analogue Scale (VAS). Psychological condition was assessed using the Beck Depression Inventory (BDI) and the Beck Anxiety Inventory (BAI). Defense mechanisms were assessed using a 40-item Defense Style Questionnaire (DSQ-40) and quality of life was assessed using Short Form-36 (SF-36). RESULTS: BDI and BAI scores were significantly higher in the SNP group (p < 0.001). Idealization and immature defense styles, as well as isolation, displacement and somatization were significantly higher in the SNP group (p < 0.05). SF-36 parameters also differed significantly between the groups, with controls having the best scores and the SNP group the worst. In linear regression analysis, acting out and BDI were found to affect the pain domain of the SF-36 (p < 0.001). CONCLUSION: The acting out defensive style and BDI were independently associated with pain-related quality of life. In the SNP group, significant differences were found in the immature and neurotic styles of the defense mechanisms.