Aim

1. Effect of materials based on gold and silver nanoparticles and natural compounds on carrageenan-induced rat paw edema Adriana Filipa, Doina Daicoviciua, Pompei Bolfab, Simona Clichicia, Adriana Muresana, Luminita Davidc, Liliana Olenicd aDepartment of Physiology, „Iuliu Hatieganu” University of Medicine and Pharmacy, Cluj-Napoca, Romania; bDepartment of Morphopathology, University of Agricultural Sciences and Veterinary Medicine, Cluj-Napoca, Romania; cFaculty of Chemistry and Chemical Engineering, Babes-Bolyai –University, Cluj-Napoca, Romania; dNational Institute for Research and Development of Isotopic and Molecular Technologies, Cluj-Napoca, Romania • Aim • to investigate the biological activity of materials based on gold (Au-VO) and silver (Ag-VO) nanoparticles and natural compounds extracted from European cranberry bush - Viburnum opulusL. (VO) on acute inflammation model in Wistar rats. Acknowledgement This work was elaborated in the frame project no 147/2012, through the program “Partnerships in priority areas-PN II” *p<0.05 VO-ctrl, 2h Background The biological synthesis of silver (Ag-VO) and gold (Au—VO) nanoparticles using plants or fruits extracts plays an important role in the field of nanotechnology and nanomedicine as it offers alternative therapeutic options which are safe, free of side effects and effective for a variety of diseases. Inflammation is a complex biological response involved in pathogenesis of a variety of diseases. Although steroids and NSAIDs are the main therapeutic agents in inflammation they cause serious side effects. Therefore, the development of new materials with comparable results and no side effects is needed. Viburnum opulus possesses promising antinociceptive activity (1), exerts a potent gastroduodenoprotective activity (2) and inhibited inflammation of HaKaT cells exposed to UVB and skin thickness in psoriasis (3) . Figure 1. Viburnum opulus L., berries Materials and Methods • the inflammation was induced by intraplantar injection of 100 μl 1% carrageenan • VO extract (15 mg/kg b.w.) and the materials based on gold (Au-VO) and silver (Ag-VO) nanoparticles functionalized with VO extract (0.3 mg/kg b.w.) were administrated orally during 4 days before injection of carageenan. • the response was compared to indomethacin (5 mg/b.w.) as positive control and saline solution as negative control. • at 2h, 24h and 48h after carageenan injection were evaluated: • the paw edema • the immunohistochemical expression of iNOS and • COX-2 in the paw tissue • the malondialdehyde (MDA), glutathione reduced/glutathione oxidized ratio (GSH/GSSG), CAT and GPx activities, IL-1β and IL-6 levelsin soft plantar tissue • Statistical analysis–GraphPad Prism 5.0 one-way ANOVA, Tukey posttest, p<0.05 Parameters of oxidative stress in paw tissue HE iNOS COX-2 2h • Conclusions • VO significantly inhibited edema formation and MDA generation in carrageenan-induced paw edema model, particularly at 2h, and increased CAT activity in parallel with the decrease of MDA level . • Both VO extract and silver nanopartciles based on VO diminished Il-1β and IL-6 levels and reduced iNOS and COX-2 expressions at 2h after carrageean injection. • Ag-VO decreased lipid peroxidation and increased the antioxidant activity in the plantar tissue, both at 2h as well as 24h. • These findings suggested that the silver nanoparticles functionalized with VO extract and VO extract may be useful in the treatment of inflammatory conditions. 24h Bibliography 1. Altun ML, Saltan Citoglu G, Yilmaz BS, Ozbek H, 2009, Antinociceptive and anti-inflammatory activities of Viburnum opulus, Pharmaceutical Biology, 2009; 47(7): 653–658 2. Zavachkivska OS, Gzhegotsky MR, Terletska OI, Lutsvk DA, Yaschenko AM, Szhura OR. Influence of Viburnum opulus proanthocyanidins on stress-induced gastrointestinal mucosal damage, J. Physiol. Pharmacol. 2006, 57, 5: 155-67. 3. Crisan M, Davis L, Moldovan B, Vulcu A, Dreve S, Schrepler-Perde M, Tatomir C, Filip AG, Bolfa P, Achim M, Chiorean I, Kacso I, Grosa Berghian C, Olenic L. New nanomaterials for the improvement of psoriatic lesions, J. Mater. Chem. B, 2013, 1, 3152–3158. 48 h