Biosynthesis of Copper Oxide Nanoparticles by Marine Streptomyces MHM38 and their Preventive Efficacy Against Paracetamol-Inducing Hepatic Damage of Albino Rats

Abstract

<jats:title>Abstract</jats:title> <jats:p>Biosynthesis methods, employing microorganisms, have emerged as an eco-friendly, clean and viable alternative to chemical and physical methods. The present study reports the biosynthesis of copper oxide nanoparticles (CuONPs) using cell-free culture supernatant of marine <jats:italic>Streptomyces</jats:italic> sp. MHM38. For the optimized production of copper oxide nanoparticles, the influence of some parameters such as concentration of copper sulphate, reaction time, filtrate to substrate ratio and pH were studied. 5mM CuSO<jats:sub>4</jats:sub> was optimal for NP production. Well-defined CuONP formation occurred after 60 min incubation when equal volume of filtrate (cell-free supernatant) to substrate (CuSO<jats:sub>4</jats:sub> solution) was added. NPs remained stable in aqueous solution with increasing time at pH 8. CuONPs were characterized by UV-vis spectroscopy, X-ray diffraction (XRD) and finally the nature of the nanoparticles was identified by elemental analysis (EDX). Uv-vis spectroscopy of CuONPs exhibited peak at 550 nm which corresponds to the Surface Plasmon Resonance of CuONPs. Most of the particles are spherical in shape and size ranges from 1.06 – 6.5 nm analyzed using Transmission Electron Microscope (TEM). Antimicrobial activity of CuONPs was performed by well diffusion method against <jats:italic>Enterococcus faecalis</jats:italic> ATCC 29212, <jats:italic>Salmonella typhimurium</jats:italic> ATCC 14028, <jats:italic>Pseudomonas aeruginosa</jats:italic> ATCC 9027, <jats:italic>Escherichia coli</jats:italic> ATCC 8939), fungi (<jats:italic>Rhizoctonia solani</jats:italic>, <jats:italic>Fusarium solani</jats:italic>, <jats:italic>Aspergillus niger</jats:italic>) and yeast (<jats:italic>Candida albicans</jats:italic> ATCC 10237) .The highest antimicrobial activities recorded were against <jats:italic>Candida albicans</jats:italic> ATCC 10237, were as <jats:italic>Salmonella typhimurium</jats:italic> ATCC 14028 and <jats:italic>Escherichia coli</jats:italic> ATCC 8939 showed the lesser activity. The preventive efficacy of CuONPs was evaluated against the oxidative stress induced by paracetamol (PAC) in albino rats. The biochemical findings of CuONPs groups appeared a significant (p˂0.05) diminish in the levels of ALT, AST, ALP, LDH, total and direct bilirubin, Urea, and Creatinine as compared to paracetamol group. Non-enzymatic and enzymatic antioxidants of CuONPs groups were significantly elevated (p˂0.05) in SOD and GSH levels and significantly low NO and MAD levels compared to the paracetamol group. Also, the histopathological examination of the CuONPs groups assured that the impact of improving CuONPs against paracetamol-induced liver damage.</jats:p>

Novel Synthesis of CuO/GO Nanocomposites and Their Photocatalytic Potential in the Degradation of Hazardous Industrial Effluents

“…The atomic composition of copper and oxygen was then calculated as 56.17 and 42.21%, respectively. CuO has a uniform distribution of copper and oxygen with an atomic ratio of 1:1 . The EDX of GO (Figure S2) shows the C and O signals at 0.5 and 0.8 keV, with a ratio of 1.315 to 2.161, indicating the purity of GO …”

“…CuO has a uniform distribution of copper and oxygen with an atomic ratio of 1:1. 43 The EDX of GO (Figure S2) shows the C and O signals at 0.5 and 0.8 keV, with a ratio of 1.315 to 2.161, indicating the purity of GO. 44 The EDX analysis confirmed the formation of CuO and GO nanocomposites with a 5:1 ratio, Figure S2.…”