02515naa a2200385 a 450000100080000000500110000800800410001902200140006002400560007410000180013024501220014826000090027030000120027952014040029165300230169565300090171865300220172770000170174970000180176670000210178470000210180570000160182670000190184270000220186170000240188370000210190770000210192870000200194970000150196970000150198470000180199970000210201770000210203877300700205921441812022-06-20       2022    bl uuuu     u00u1 u    #d  a0141-81307 ahttps://doi.org/10.1016/j.ijbiomac.2022.05.0252DOI1 aBORGES, F. A.  aMetronidazole-loaded gold nanoparticles in natural rubber latex as a potential wound dressing.h[electronic resource]  c2022  a568?579  aGold nanoparticles (AuNPs) have shown interesting properties and specific biofunctions, providing benefits and new opportunities for controlled release systems. In this research, we demonstrated the use of natural rubber latex (NRL) from Hevea brasiliensis as a carrier of AuNPs and the antibiotic metronidazole (MET). We prepared AuNP-MET-NRL and characterized by physicochemical, biological and in vitro release assays. The effect of AuNPs on MET release was evaluated using UV?Vis and Laser-Induced Breakdown Spectroscopy (LIBS) techniques. AuNPs synthesized by Turkevich and Frens method resulted in a spherical shape with diameters of 34.8 ± 5.5 nm. We verified that there was no emergence or disappearance of new vibrational bands. Qualitatively and quantitatively, we showed that the MET crystals dispersed throughout the NRL. The Young's modulus and elongation values at dressing rupture were in the range appropriate for human skin application. 64.70% of the AuNP-MET complex was released within 100 h, exhibiting a second-order exponential release profile. The LIBS technique allowed monitoring of the AuNP release, indicating the Au emission peak reduction at 267.57 nm over time. Moreover, the dressing displayed an excellent hemocompatibility and fibroblast cell viability. These results demonstrated that the AuNP-MET-NRL wound dressing is a promising approach for dermal applications  aGold nanoparticles  aLIBS  aSustained release1 aDRAGO, B. C.1 aBAGGIO, L. O.1 aBARROS, N. R. de1 aBRASIL, G. S. P.1 aSCONTRI, M.1 aMUSSAGY, C. U.1 aRIBEIRO, M. C. S.1 aMILORI, D. M. B. P.1 aMORAIS, C. P. de1 aMARANGONI, B. S.1 aNICOLODELLI, G.1 aMECWAN, M.1 aMANDAL, K.1 aGUERRA, N. B.1 aMENEGATTI, C. R.1 aHERCULANO, R. D.  tInternational Journal of Biological Macromoleculesgv. 211, 2022.