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Showing 5 results for Subject: Nanobiotecnology

, , ,
Volume 0, Issue 0 (7-2022)
Abstract


M Salehi, S Fatahian, K Shahanipour,
Volume 19, Issue 1 (3-2017)
Abstract

Background and Objective: Iron oxide nanoparticles have wide applications such as MRI contrast agent and drug delivery. Nevertheless, their effects on human health have not been fully investigated yet. After cellulose, chitin is one of the most abundant organic materials in nature which is widely used in food industry, cosmetics, agriculture, medicine and the environment. This study was done to evaluate the effect of iron oxide nanoparticles coated with chitosan on renal functional indeces in rat.

Methods: In this experimental study, 60 adult female Wistar rats were allocated into 10 equal groups. Concentrations of 50, 100 and 150 mg/kg/bw from chitosan, iron oxide nanoparticles and chitosan coated nanoparticles were intraperitoneally injected into 9 groups and animals in control group were received normal saline. Blood samples were collected directly from the rat heart in the days 15 and 30 post after injection and renal functional indeces including urea, creatinine, uric acid, sodium, potassium and total protein were measured.

Results: There were no significant differences in the level of urea, creatinine, uric acid, sodium, potassium and total protein in the groups whom received chitosan-coated iron oxide nanoparticles compared to control. There was no mortality during the study time.

Conclusion: Short-term using of iron oxide nanoparticles coated with chitosan does not create any toxicity in the rat kidney.


N Azadeh, Z Hoshmandi, M Setorki,
Volume 19, Issue 1 (3-2017)
Abstract

Background and Objective: Iron oxide nanoparticles, including nanoparticles is important in industry and medicine. Nanoparticles affect on detoxification of environmental pollutants such as Pesticides and chlorinated organic solvents.This study was done to evaluate the short term effect of Fe2NiO4 composite nanoparticle on kidney function indeces in wistar rats.

Methods: In this experimental study, Twenty four Wistar rat were randomly allocated into three groups, including: control, treated groups 1 and 2. Animales in control, treated groups 1 and 2 were received 0.5cc of saline, 0.5cc of solution containing 100, 200 ppm Fe2NiO4 for 7 days, respectively. Uric acid, ceratinine and urea (BUN) were measured at day 2, 7 and 14.

Results: BUN level in treated groups 1 and 2 significantly reduced in comparison with control group at day 7, 14 after intervention (P<0.05). Uric acid level in treated groups 1 and 2 significantly increased at day 7 and 14. 2 week after intervention, the mean creatinine levels in treated group 2 group significantly reduced in compare  to the in treated group 1 and controls (P<0.05).

Conclusion: It seems that the application of Fe2NiO4 nanoparticles in biological system has no toxic effect on the kidney function indeces.


Sajjad Rajabi, Ali Noori , Fatemeh Shahbazi ,
Volume 21, Issue 3 (10-2019)
Abstract

Background and Objective: Copper oxide nanoparticles with unique properties have numerous biological applications with probably toxicity. This study was conducted to determine the toxicity of copper oxide nanoparticles on the pituitary-gonadal axis and spermatogenesis in male rats.
Methods: In this experimental study, 40 male Wistar rats were randomly allocated into 4 groups including control group and three intervention  groups which receiving the cancentration of 10, 20 and 30 mg/kg of copper oxide nanoparticles 5 times intra-peritoneally, respectively. Blood sampling was collected first day and 15 days after the last injection. Level of testosterone, FSH and LH were measured by ELISA method. After anesthesia and dissection of mice in each group, tissue sections of testis were prepared and stained with hematoxylin-eosin. Morphological status of spermatogenesis process and counting of types of cells (spermatogonium, spermatocyte and spermatid) were studied by optical microscope.
Results: In the first day of blood collection, a significant increase in LH and FSH level was observed at concentrations of 10 and 30 mg/kg, respectively. Also, Testosterone and FSH level decreased significantly reduced at 10 mg/kg/bw concentration compared to control (P<0.05). In 15 days after of the last injection, level of testosterone (P<0.05) and LH (P<0. 05) significantly increased in concentrations of 10 and 30 mg/kg/bw respectively. Also, there was a significant reduction in level of FSH in the concentration of 10 mg/kg/bw (P<0.05). The examination of testis tissue sections showed a significant decrease (P<0.05) in density and number of cell types (spermatogonium, spermatocyte and spermatid) and anomalies in the spermatogenesis process, in a dose-dependent manner. The most disturbances was seen at a concentration of 30 mg/kg/bw of copper oxide nanoparticles.
Conclusion: Copper oxide nanoparticles may interfere with the secretion of gonadotropins and testosterone and ultimately lead to a disruption of the spermatogenesis process.

Minoo Akbari , Ali Hossein Rezayan , Hossein Rastegar, Mahmoud Alebouyeh ,
Volume 23, Issue 4 (1-2022)
Abstract

Background and Objective: Binding of antibiotics to nanoparticles increases the antibacterial potential of nanoparticles and antibiotics. This study was performed to determine the antibacterial and hemolytic effect of zinc / ferrite / cellulose nanocomposite (ZnFe2O4 @ Cell) (single nanoparticle), zinc / ferrite / cellulose nanocomposite was aminated with 3-aminopropyltriethoxysilane (APTES) with the name of ZnFe2O4@Cell@APTES (Coated nanocomposite) and ZnFe2O4@Cell@APTES@Van nanocomposite (coated nanocomposite bound to vancomycin) against gram-negative bacteria Escherichia coli (E. coli) and Pseudomonas aeruginosa (P. aeruginosa) and gram-positive bacterium Staphylococcus aureus (S. aureus).
Methods: In this descriptive study, antibacterial-activity was evaluated by broth macro dilution method. Minimum inhibitory concentration (MIC) and minimum lethal concentration (MBC) were determined for E. coli, S. aurous and P. aeruginosa. The hemolytic activity of nanoparticles was investigated by colorimetric method.
Results: Nanoparticles did not have hemolytic activity. ZnFe2O4@Cell and ZnFe2O4@Cell@APTES@Van did not have a significant antibacterial effect against gram-positive and gram-negative bacteria, and vancomycin binding resulted in antibacterial-activity. ZnFe2O4@Cell@APTES@Van inhibited the growth of Gram-negative bacteria Escherichia coli and Pseudomonas aeruginosa. The growth of E. coli was reduced to 85% at a concentration of 0.4 mg/ml and a concentration of 0.1 mg nanoparticles completely prevented the growth of P. aeruginosa. The growth of gram-positive S. aureus bacteria at a concentration of 0.3 mg/ml nanoparticles was completely stopped.
Conclusion: Vancomycin-modified nanocomposite has antibacterial-activity against both gram-positive and gram-negative bacteria and has the potential to overcome the antibiotic resistance of bacteria.


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مجله علمی دانشگاه علوم پزشکی گرگان Journal of Gorgan University of Medical Sciences
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