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Background: Despite the tremendous progress in human medicine, viral infections can cause death in them. Due to the high prevalence of viruses, it is required to develop novel treatment strategies and provide the site-specific delivery of antiviral agents at the viral reservoirs. Objectives: Particle size is a vital physical characteristic that can affect the bioavailability and circulation time of nanoparticles. The ratio of large surface area and volume of nanoparticle could enhance the solubility of poorly soluble drug compounds. Methods: Therefore, the optimum surface charge of the nanoparticle with the possibility of encapsulation and large drug cargo, are some of the nanoformulation advantages of these agents. Results: This study reviewed various nanocarriers and modern smart delivery technologies, such as liposomes and immunoliposomes, polymeric nanoparticles, nanoemulsions, nanosuspensions, dendrimers, solid lipid nanoparticles, and so on. Conclusion: We aimed to overcome the problems of traditional formulations and resistance to currently available therapies in various infections. Moreover, the concerns about the potential toxicities of nanoparticles to humans have been raised; therefore, the present study has reviewed the toxicity effects of nanoparticles used in controlling viral infections.

Background In spite of the cardiotoxic effect of selective cyclooxygenase-2 inhibitors, they are most widely used as anti-inflammatory and analgesic drugs. Today, valdecoxib and rofecoxib have been withdrawn on the market but celecoxib remains. In this study, we focused on an analysis of celecoxib toxic effects on isolated mitochondrial. Methods isolated rat heart mitochondria were obtained using differential centrifugation. Using flowcytometry and biochemical assays we searched succinate dehydrogenases (SDH), mitochondrial membrane potential (MMP), reactive oxygen species (ROS) formation, mitochondrial swelling, lipid peroxidation and mitochondrial complexes activity in rat heart isolated mitochondria. Results In here our results indicated a significant decrease in activity of complexes IV after exposure with celecoxib (16 µg/ml). This decrease in activity of complexes IV is paralleled by the MMP collapse, ROS formation, mitochondrial swelling and lipid peroxidation. Conclusion For the first time, this introductory study has showed a significant decrease in activity of complexes IV and mitochondrial dysfunction after exposure with celecoxib in rat heart isolated mitochondria.