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Hanouf Almukhlafi, Daoud Ali, Bader Almutairi, Khadijah N Yaseen, Nouf Alyami, Rafa Almeer, Saad Alkahtani, Saud Alarifi Department of Zoology, College of Science, King Saud University, Riyadh, Saudi ArabiaCorrespondence: Saud AlarifiDepartment of Zoology, College of Science, King Saud University, BOX 2455, Riyadh, 11451, Saudi ArabiaTel +966 11 4679816Fax +966 11 4678514Email salarifi@ksu.edu.saIntroduction: Nanoparticles are extensively applied in pharmaceutical, agriculture, food processing industries, and in many other fields. In the current experiment, we have determined the mechanism of toxicity of lanthanum oxide nanoparticles (La2O3 NPs) on human liver cell lines.Methods: Before the investigation, we have characterized the size and shape of La2O3 NPs using dynamic light scattering (DLS) and transmission electron microscope (TEM). The mean size of the La2O3 NPs was found 32 ± 1.6 nm with a sheet-like shape. The cytotoxicity effect of La2O3 NPs for 24 h on CHANG and HuH-7 cells was determined by using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and lactate dehydrogenase (LDH) assays.Results: The cytotoxicity was observed in a concentration-dependent manner in both cells but NPs were more toxic to HuH-7 than CHANG cells. Generation of reactive oxygen species (ROS) was determined using fluorescent dye 2′,7′-dichlorofluorescin diacetate (DCFDA) and high green fluorescence was observed in HuH-7 cells than CHANG cells. Oxidative stress biomarker such as glutathione (GSH) was decreased and antioxidant enzyme superoxide dismutase (SOD) was increased but SOD level was decreased in HuH-7 cells than CHANG cells. Apoptotic cells were determined by using fluorescence-activated cell sorting (FACS) analysis. Maximum percentage of the apoptotic cell was observed at 300 μg/mL in HuH-7 cells. DNA double-stranded breakage was observed by comet assay and maximum DNA damage was found in CHANG cells than HuH-7 cells at 300 μg/mL La2O3 NPs for 24 h.Conclusion: Thus, this study demonstrated that La2O3 NPs were toxic to human liver cells and induced more toxicity in HuH-7 cells than CHANG cells.Keywords: La2O3 NPs, apoptosis, oxidative stress, CHANG and HuH-7 cells

Ravinder Verma,1 Ajeet Kaushik,2 Rafa Almeer,3 Md Habibur Rahman,4 Mohamed M Abdel-Daim,3,5 Deepak Kaushik1 1Department of Pharmaceutical Sciences, M.D. University, Rohtak, Haryana, 124001, India; 2NanoBioTech Laboratory, Health Systems Engineering, Department of Natural Sciences, Division of Sciences, Arts, & Mathematics, Florida Polytechnic University, Lakeland, FL, 33805-8531, USA; 3Department of Zoology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia; 4Department of Pharmacy, Southeast University, Banani, Dhaka, 1213, Bangladesh; 5Pharmacology Department, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, 41522, EgyptCorrespondence: Deepak KaushikDepartment of Pharmaceutical Sciences, Maharshi Dayanand University, Rohtak, Haryana, 124001, IndiaTel +91-931580962Email deepkaushik1977@gmail.comMohamed M Abdel-DaimDepartment of Zoology, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi ArabiaEmail abdeldaim.m@vet.suez.edu.egPurpose: The purpose of this proposed research was to investigate a nano-formulation developed using self-nanoemulsifying drug delivery system (SNEDDS) to improve the pharmacodynamic potential of rosuvastatin by assisting its transportation through lymphatic circulation.Methods: The utilized lipids, surfactants, and co-surfactants for SNEDDS were selected on the basis of solubility studies. The SNEDDS formulation was optimized by implementing a D-optimal mixture design, wherein the effect of concentration of Capmul MCM EP (X1), Tween 20 (X2) and Transcutol P (X3) as independent variables was studied on droplet size (Y1), % cumulative drug release (Y2) and self-emulsification time (Y3) as dependent variables. The optimized formulation was evaluated via in vitro parameters and in vivo pharmacodynamic potential in Wistar rats.Results: The D-optimal mixture design and subsequent ANOVA application resulted in the assortment of the optimized SNEDDS formulation that exhibited a droplet size of nano range (14.91nm), in vitro drug release of > 90% within 30 minutes, and self-emulsification time of 16 seconds. The in vivo pharmacodynamic study carried out using Wistar rats confirmed the better antihyperlipidemic potential of developed formulation in normalizing the lipidic level of serum in contrast to pure drug and marketed tablets.Conclusion: This research reports the application of D-optimal mixture design for successful and systematic development of rosuvastatin-loaded SNEDDS with distinctly enhanced in vitro and in vivo performance in comparison to marketed formulation. Eventually, improved anti-hyperlipidemic efficacy was envisaged which might be attributed to increased drug solubility and absorption. Overall, this study shows the utility of SNEDDS for improving the dissolution rate and bioavailability of poor aqueous-soluble drugs. The present SNEDDS formulation could be a promising approach and alternative to conventional dosage form.Keywords: SNEDDS, rosuvastatin, in vitro lipolysis, nanotechnology, D-optimal mixture design, pharmacodynamic study

Daoud Ali, Saud Alarifi, Saad Alkahtani, Rafa S Almeer Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia Introduction: Graphene oxide nanoparticles have been widely used in industry and biomedical fields due to their unique physicochemical properties. However, comparative cytotoxicity of silver-doped reduced graphene oxide (rGO–Ag) nanoparticles on normal and cancerous liver cells has not been well studied yet. Materials and methods: This study aimed at determining the toxic potential of rGO–Ag nanocomposite on human liver normal (CHANG) and cancer (HepG2) cells. The rGO–Ag nanocomposite was characterized by using different advanced instruments, namely, dynamic light scattering, scanning electron microscope, and transmission electron microscope. Results: The rGO–Ag nanocomposite reduced cell viability and impaired cell membrane integrity of CHANG and HepG2 cells in a dose-dependent manner. Additionally, it induced reactive oxygen species generation and reduced mitochondrial membrane potential in both cells in a dose-dependent manner. Moreover, the activity of oxidative enzymes such as lipid peroxide, superoxide dismutase, and catalase were increased and glutathione was reduced in both cells exposed to rGO–Ag nanocomposite. Pretreatment with N-acetylcysteine inhibited cytotoxicity and reactive oxygen species generation in CHANG and HepG2 cells exposed to rGO–Ag nanocomposite (50 µg/mL). DNA damage was determined by Comet assay and maximum DNA damage occurred at rGO–Ag nanocomposite (25 µg/mL) for 24 h. It is also valuable to inform that HepG2 cells appear to be slightly more susceptible to rGO–Ag nanocomposite exposure than CHANG cells. Conclusion: This result provides a basic comparative toxic effect of rGO–Ag nanocomposite on hepatic normal and cancerous liver cells. Keywords: oxidative stress, CHANG and HepG2 cells, cytotoxicity, DNA fragmentation, apoptosis

Introduction: Nanoparticles are extensively applied in pharmaceutical, agriculture, food processing industries, and in many other fields. In the current experiment, we have determined the mechanism of toxicity of lanthanum oxide nanoparticles (La 2 O 3 NPs) on human liver cell lines., Methods: Before the investigation, we have characterized the size and shape of La 2 O 3 NPs using dynamic light scattering (DLS) and transmission electron microscope (TEM). The mean size of the La 2 O 3 NPs was found 32 ±1.6 nm with a sheet-like shape. The cytotoxicity effect of La 2 O 3 NPs for 24 h on CHANG and HuH-7 cells was determined by using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and lactate dehydrogenase (LDH) assays., Results: The cytotoxicity was observed in a concentration-dependent manner in both cells but NPs were more toxic to HuH-7 than CHANG cells. Generation of reactive oxygen species (ROS) was determined using fluorescent dye 2',7'-dichlorofluorescin diacetate (DCFDA) and high green fluorescence was observed in HuH-7 cells than CHANG cells. Oxidative stress biomarker such as glutathione (GSH) was decreased and antioxidant enzyme superoxide dismutase (SOD) was increased but SOD level was decreased in HuH-7 cells than CHANG cells. Apoptotic cells were determined by using fluorescence-activated cell sorting (FACS) analysis. Maximum percentage of the apoptotic cell was observed at 300 µg/mL in HuH-7 cells. DNA double-stranded breakage was observed by comet assay and maximum DNA damage was found in CHANG cells than HuH-7 cells at 300 µg/mL La2O3 NPs for 24 h., Conclusion: Thus, this study demonstrated that La2O3 NPs were toxic to human liver cells and induced more toxicity in HuH-7 cells than CHANG cells., Competing Interests: The authors report no conflicts of interest in this work., (© 2021 Almukhlafi et al.)