The Purpose: to determine the acute toxicity of new metal complexes of iron derived vinylimidazole and to reveal their antihypoxic activity in comparison with Acyzol and other known antihypoxic etomersol and hypoxen. Material and methods. Antihypoxic activity was studied in experiments on nonlinear white mice-males 4 models of acute hypoxia (hypobaric, hypoxia with hypercapnia, hemic, histotoxic). Rates of acute toxicity (LD16, LD LD ) were calculated graphically by the method of Miller and Tainter. Changes in oxidative metabolism in mice under the influence of the most active compounds were assessed by the values of oxygen consumption and rectal temperature. Results. The studied metal complexes of iron are small and moderately toxic. The connection under the code of Tetravim on the severity of antihypoxic effect (the increase in life expectancy male mice compared to control groups on 20-127%) in the range of doses studied (5-250 mg/kg, i/p) is superior to other derivatives of vinylimidazole known and antihypoxic: etomersol (25-100mg/kg, i/p) and hypoxen (50-150 mg/kg, i/p). Conclusion. The obtained data on the pharmacological activity of Tetravim require further clarification of the mechanism of antihypoxic effect and clinical trials with the aim of putting it on the drugs market as a promising antihypoxic agent.
Shakhmardanova S.A. The study of acute toxicity and antihypoxic activity of new metal complexes of iron // Saratov Journal of Medical Scientific Research, Vol. 11, Issue 1, 2015, pp. 146-150

Objective: Morphological changes of internal organs and brain of laboratory animals have been studied at prolonged oral administration of iron nanoparticles in experiments. Materials and methods: Iron nanoparticles 70±10 nm, 28 male white rats, and morphological methods of evaluation have been used in the experiment. Results: Studies have shown that the changes depend on nanoparticle concentration and signs of circulatory disorders and degenerative changes of parenchymatous elements
Navolokin N.A., Kun S.M. Morphological changes of internal organs and brain at prolonged oral administration of iron nanoparticles // Saratov Journal of Medical Scientific Research, Vol. 7, Issue 4, 2011, pp. 760-762

We determined the cytotoxic effect of iron nanoparticles of 70 nm, with a single per oral administration in an experiment on white outbred mice. Morphological changes were evaluated in the internal organs. Thus, changes depend on the concentration of nanoparticles at long-term per oral exposure: identified violations of the structure of the liver, kidneys and spleen as venous plethora and degeneration of cells at 250 and 500 mkg / kg dose of nanoparticles are reversible, changes in the organs were pronounced with a dosage of 1000 mkg / kg.
N A Navolokin et al 2012 J. Phys.: Conf. Ser. 345 012043 doi:10.1088/1742-6596/345/1/012043

The research objective was to study the dynamics of the bacterial contamination and the healing rate of the experimental purulent wound when applying the suspension of copper, iron, zinc nanoparticles locally. Iron, copper and zinc nanoparticles received by a plasmochemical method were used under the influence of a plasmic stream with the temperature 5000-6000°K. 40 white rats — males with purulent wounds were used in the investigation. Planimetric and bacteriological methods of study helped evaluate the traumatic process. They were carried out on the 3rd, 5th, 7th, 10th and 14th days. Application of the suspension of copper nanoparticles ensured the elimination of the causative agent which had contaminated the wound in a short period of time in comparison with the groups in which iron and zinc nanoparticles had been applied and the control group. The shortest term of wound healing was detected when using the suspension of copper nanoparticles; a rather less healing rate was observed when using the suspension of zinc nanoparticles. Regenerating action of iron nanoparticles was less evident considerably, but significantly differed from the control group. In conclusion it was stated that the use of the suspensions of metal nanoparticles in the isotonic solution was proved to be effective in the local treatment of purulent wounds. Suppression of microbial flora and regenerative action were detected to various degrees. The most evident antiseptic and regenerative action was determined in copper nanoparticles
Babushkina I. V. Metal nanoparticles in treatment of experimental purulent wounds // Saratov Journal of Medical Scientific Research, Vol. 7, Issue 2, 2011, pp. 530-533

Research objective is to study antibacterial action of nanoparticles of iron and copper on polyantibiotically resistant clinical Staphylococcus aureus strains. Materials and methods include antibacterial action of nanoparticles of copper and iron on 10 Staphylococcus au¬reus strains, isolated from patients with purulent complications stayed in the in-patient department of traumatology and orthopedics. Solutions of powders of iron and copper have been prepared directly before the experiment in concentra¬tion from 0,001 to 1 mg/ml. it has been revealed that the influence of nanoparticles on growth of clinical strains and the intensity of antibacterial effect depends on the form of nanoparticles, their concentration and action time. concentration of 0,1 mg/ml and 1 mg/ ml of iron nanoparticles has provoked the decrease in quantity of microbe cells from 3 to 34 % (p <0,01). in smaller concentrations the reliable antibacterial effect has not been observed. Antibacterial activity of copper nanoparticles has been expressed in a wide range of concentrations from 0,001 mg/ml to 1 mg/ml, even during short-term action (30 minutes) it has provoked reduction of quantity of the microbe cells grown on the firm nutrient medium, 97-100 % in comparison with the control (p <0,001). in conclusion it is to point out that copper nanoparticles have more expressed inhibitory effect on growth of clini¬cal strains of golden staphylococcus than iron nanoparticle suspension. inhibition degree depends on superdispersed powder dosage and incubation period
I.V. Babushkina, V.B. Borodulin, G.V. Korshunov, D.M. Puchinjan Comparative study of antibacterial action of iron and copper nanoparticles on clinical Staphylococcus aureus strains // Saratov Journal of Medical Scientific Research, Vol. 6, Issue 1, 2010, pp. 11-14