This study evaluated the antiallodynic properties of berberine on cold and mechanical allodynia after streptozotocin (STZ)-induced diabetes using a rat model. Diabetic neuropathy was induced in rats by intraperitoneal injection of STZ. To measure cold and mechanical allodynia, a 4°C plate and von Frey filament were used, respectively. Cold and mechanical allodynia induced by diabetes were significantly decreased by single and repeated intraperitoneal treatment of amitriptyline at 10 mg/kg, and berberine at 10 and 20 mg/kg. The hepatic malondialdehyde, superoxide dismutase, catalase, and glutathione peroxidase activities were significantly increased in diabetic rats as compared with those in intact rats; however, in amitriptyline-and berberine-treated rats, they were significantly decreased as compared to the STZ control. The overall effects of berberine 20 mg/kg on cold and mechanical allodynia were quite similar to those of amitriptyline 10 mg/kg, and berberine exhibited similar antioxidant effects as the same dosage of amitriptyline. In conclusion, berberine (10 and 20 mg/kg) was observed to have antiallodynic effects against diabetes, which are presumed to be associated with antioxidative effects. It can be considered that the anti-inflammatory or antidepressant capacity of berberine could contribute to the antiallonynic effects shown in this study.

No abstract

The objective of this study was to investigate whether berberine could ameliorate allodynia induced by chronic constriction injury (CCI) of the sciatic nerve in rats. After inducement of CCI, significant increases in the number of paw lifts from a cold plate test (cold allodynia) and decreased paw withdrawal threshold in the von Frey hair stimulation test (mechanical allodynia) were observed. However, these cold and mechanical allodynia were markedly alleviated by berberine administration in a dose-dependent manner. Sciatic nerve myeloperoxidase and malondialdehyde activities were also attenuated by berberine administration. Continuous injection for 7 days induced no development of tolerance. The antiallodynic effect of 20 mg/kg berberine was comparable to that of amitriptyline 10 mg/kg. This study demonstrated that berberine could mitigate allodynia induced by CCI, a neuropathic pain model, and it suggested that the anti-inflammatory and antioxidative properties of berberine contributed to the antiallodynic effect in the CCI model.

This study was planned to evaluate the preventive effect of dexamethasone for sore throat after ambulatory laryngeal microsurgery. One hundred and ten patients scheduled for ambulatory laryngeal microsurgery under general anesthesia were randomly divided into two groups, group S1 and group D1. Patients in the group D1 were injected with 0.2 mg/kg of intravenous dexamethasone before the induction of anesthesia. The incidences and severities of sore throat were measured using verbal rating scale (VRS) at 1 h and through phone calls at 6 h after the operation. The patients who requested analgesics in the recovery room were measured VRS shortly before administration of medicine. The patients in group S1 and group D1 who did not receive rescue analgesics were enrolled in group S6 and group D6, respectively, and evaluated 6 h after the surgery. There were no significant differences in the incidence and severity scores of sore throat during 1 h after the end of operation between group S1 and group D1. But at 6 h, the patients in the group D6 had lower incidence of sore throat than those in group S6 significantly (P = 0.003). Furthermore, the patients in the group D6 had lower severity of sore throat than those in group S6 significantly at 6 h (P = 0.001). In conclusion, prophylactic administration of intravenous dexamethasone is appeared to have efficacy for the management of sore throat in the early post-discharge period following ambulatory laryngeal microsurgery.

Hydroxyethyl starch (HES) solutions are synthetic non-protein colloid solutions used to treat hypovolemia. However, their use is not free from the risk of allergic reactions. A 42-year-old male was scheduled to undergo aortic-iliac-femoral bypass surgery for the treatment of arteriosclerosis obliterans. He had no history of allergy. Two hours after the start of surgery, and within minutes after HES administration, facial erythema, hypotension and bronchospasm developed. HES infusion was discontinued under the estimation of anaphylaxis. The patient received phenylephrine, ephedrine, diphenhydramine and hydrocortisone with hydration. After restoration of vital signs, surgery was performed without complications.