Saratov JOURNAL of Medical and Scientific Research

experimental animals

The modified assessment technique of the condition of lungs at the experimental animals at extreme exposures

Summary:

Purpose: to develop a modified method of measuring a set of biophysical indices of the lungs elaborated, which allows to assess the extent of their lesions from mild, moderate to severe. This technique allows for a short time to conduct a rapid assessment of the lungs of a large number of experimental animals of different species under varying extreme influences for the subsequent extrapolation of these data to humans. Material and Methods. The study was conducted using Chinchilla rabbits weighing 2.5-3.0 kg, and sheep weighing 25-35 kg. Lung mass and volume were defined, and values of biophysical indices were calculated: specific density of air-filled and collapsed lungs; their ratio — ALPHA index; residual volume. Results. The values of main lung biophysical indices of experimental animals in norm were received. The scale of lung condition estimate and degree of injury of experimental animals as compared with the control group was developed. Conclusion. The given technique of rapid estimate of the lung condition according to biophysical indices allows to give a rapid and objective assessment of significant lung injuries in experimental animals. Easy realization and availability of necessary equipment enable to use this technique in the studies of experimental lung pathology.

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Immuno-morphological features of the rat's thymus at the experimental administration of cytostatics

Year: 2016, volume 12 Issue: №1 Pages: 12-14
Heading: Macro- and Micromorphology Article type: Original article
Authors: Lebedinskaya Е.А., Lebedinskaya O.V., Godovalov А.Р., Prokudin V.S.
Organization: Perm State University of Medicine n.a. academician E.A. Vagner
Summary:

The aim is to identify the changes in the rat's thymus structure under immunosuppression induced injection of cyclophosphamide with the use of morpho-histochemical and morphometric methods. Material and methods. For immunosuppression of animals cyclophosphamide at 100mg/kg body weight 4-fold with a 24-hour interval was injected intraperitoneally. Thymus serial paraffin sections were stained with hematoxylin and eosin, azure ll-eosin, methyl green pyronin according to Brachet, and periodic acid-Schiff before and after treatment with amylase. Results. Significant morphological changes in the thymus at rats with injection of cyclophosphamide were established. Morpho-histochemical changes in the rat's thymus characterize the immunosuppressive state of the experimental animals' organisms. Conclusion. It was shown the necessity of complex morphological studies including macrophage activity and characteristics of the subpopulation of mononuclear leukocytes spleen, changes in the structure of hematopoietic and lymphoid organs under immunosuppression induced by cyclophosphamide.

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