Quantitative morphological evaluation of structural reconstruction Of arteries of testis at arterial hypertension in small blood сirculation
DOI:
https://doi.org/10.11603/2414-4533.2019.3.10544Keywords:
arteries, testis, pulmonary arterial hypertensionAbstract
The aim of the work: to study the peculiarities of structural reconstruction arteries of the testis at postresection pulmonary arterial hypertension.
Materials and Methods. Structural reconstruction of arteries of the testis in 45 rats, which were divided into 3 groups, was investigated by morphological methods. The group 1 included 15 intact animals, group 2 – 20 rats with hypertension in the small circle of circulation and compensated cor pulmonale, group 3 – 10 experimental animals with pulmonary arterial hypertension and decompensated cor pulmonale. Postresection pulmonary arterial hypertension and cor pulmonale were modeled by performing right-sided pulmonectomy in rats. One month after the start of the experiment, euthanasia of rats was performed by bloodletting under conditions of thiopental anesthesia. Conducted a separate weighing of the chambers of the heart, their planimetry. Pieces were removed from the testes, which were fixed in 10 % formalin solution, passed through ethyl alcohols of increasing concentration and placed in paraffin. Microtomic sections were stained with different paints after deparaffinization. In the left and right testes, the outer and inner diameters of small-caliber arteries, media thickness, Kernaghan index, height of endothelial cells, diameter of their nuclei, nuclear-cytoplasmic ratios in endothelial cells, relative volume of damaged cells were measured. Quantitative indicators were processed statistically.
Results and Discussion. We morphometrically revealed that with decompensation of the postresection cor pulmonale, the lumen of the small-caliber arteries of the left testis decreased by 12.6 %, the Kernaghan index – by 11.7 % and the right – by 9.5 and 9.9 %, respectively. The relative volume of damaged endothelial cells of the investigated vessels in the left testis increased 11.6 times at right ventricular failure and 9.3 times in the right testis. It was established that the model pathology results in thickening of the arterial wall, narrowing spaces research arteries, damage endotheliocytes that led to their dysfunction, decreasing of organ blood supply, hypoxia, dystrophic and necrobiolic changes of tissues and cells, infiltration, sclerosis. Structural changes of arteries prevail in left testis of decompensated cor pulmonale.
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