Barbosa R.A.,Tiradentes University |
Nunes T.L.G.M.,Tiradentes University |
Paixao A.O.D.,Tiradentes University |
Neto R.B.,Tiradentes University |
And 12 more authors.
Pharmaceutical Biology | Year: 2015
Context: Peripheral axon injury and degeneration are often mediated by oxidative stress and inflammation. The hydroalcoholic extract of the red propolis (HERP) has attracted great attention because of its antioxidant and anti-inflammatory activities. Objective: The objective of this work is to study the effect of HERP on nerve repair and functional recovery after sciatic nerve injury (SNI) in rats. Materials and methods: The chemical markers in HERP were identified using high-resolution mass spectroscopy. After axonotmesis of sciatic nerve, ibuprofen (IBP) and HERP treatments were orally administered for 28 d. Behavioural tests were performed weekly after SNI. The myelinated axon number was counted using morphometric analysis. Results: The compounds found in HERP were pinocembrin, formononetin, vestitol, and biochanin A. The animals that underwent SNI showed a significant decrease in motor function based on the Basso, Beattie and Bresnahan scale and sciatic functional index compared with sham animals until 7 d after the surgery (p < 0.05). After 14 and 21 d, the SNI groups treated with either HERP or IBP showed significant improvement (p < 0.01), and the SNI group treated with HERP 10 mg/kg showed accelerated motor recovery compared with the other groups (p < 0.01). SNI caused also a reduction in the myelinated axon counts, and treatment with HERP 10 mg/kg induced a significant increase in the number of myelinated fibres compared with all other groups. Conclusion: HERP promoted regenerative responses and accelerated functional recovery after sciatic nerve crush. Thus, it can be considered to be a new strategy or complementary therapy for treating nerve injuries. © 2015 Taylor & Francis
Da Silva R.O.,Tiradentes University |
Andrade V.M.,Tiradentes University |
Bulle Rego E.S.,Tiradentes University |
Bulle Rego E.S.,Federal University of Sergipe |
And 14 more authors.
Journal of Ethnopharmacology | Year: 2015
Ethnopharmacological relevance Propolis is a bee product widely used in folk medicine due to its numerous pharmacological properties. However, samples from different regions can differ in chemical composition, effectiveness, and side effects. Despite the widespread use of Brazilian red propolis, which is an isoflavone-rich variety, its toxicity has not been carefully studied. Aims of the study To assess the acute and sub-acute toxicity of the hydroethanolic extract of red propolis (HERP) administered orally to rats. Materials and methods HERP for the acute (300 mg/kg) and sub-acute (10, 100 and 200 mg/kg) toxicity studies was administered orally to rats according to OECD Guidelines 420 and 407, respectively. Clinical signs were identified, and hematological and biochemical analyses were performed. Water and food uptake as well as body and organ weights of animals were recorded. Results and conclusions The acute study revealed no lethal effects at 300 mg/kg of HERP, but toxic signs were observed, as HERP had an LD50 of more than 300 mg/kg, indicating a warning. The most toxic signals in sub-acute studies were observed in males at a dose of 200 mg/kg HERP. These results suggest estrogen-like activity, possibly from the isoflavones in HERP. © 2015 Elsevier Ireland Ltd. All rights reserved.