Ultramicroscopic Features of the Mandibular Glands of Rats in Norm and Chronic Ethanol Intoxication

Шевченко, К. В.

doi:10.29254/2077-4214-2020-3-157-264-268

Cited by 1 publication

(2 citation statements)

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“…The first group consisted of intact rats, which were under normal conditions without the influence of additional factors. The second group of animals was simulated alcohol intoxication by administering 40% ethanol solution at a rate of 12 mg/kg body weight intragastrically 4 times a day [19,25,26]. On day 30 after the start of the experiment, rats were euthanized with thiopental anesthesia at a rate of 25 mg/kg body weight.…”

Section: Methodsmentioning

confidence: 99%

“…The greatest impact as a result of ongoing chemical reactions aimed at the excretion of ethanol and detoxification of the body are the liver and kidneys. Changes in the morphology of various organs of visceral systems are described in detail in the literature [1,16,17,18,19,22]. At the same time, the effect of ethanol on the morphofunctional state of various parts of the brain has not been studied enough.…”

Section: Introductionmentioning

confidence: 99%

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Morphometric features of rat pinealocytes in conditions of chronic ethanol intoxication

Pshychenko

Черно

2021

Rep. of Morph.

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Ethanol has chronobiological effects, which are associated with inhibition of melatonin synthesis and secretion and disruption of the sleep-wake cycle. Ethanol is known to cause sleep fragmentation due to frequent awakenings, prolong wakefulness, and reduce the duration of the slow sleep phase. At the same time, changes in the morphology of the pineal gland under chronic exposure to ethanol remain poorly studied. Of particular interest are changes in the basic morphometric parameters of pinealocytes, because they are a marker of the functional state of the pineal gland. The aim of the study was to morphometrically study the features of morphological changes in rat pinealocytes in the physiological norm and in chronic ethanol intoxication. To achieve this goal, we used 20 laboratory male rats: a control group and an experimental group. The control group was under standard vivarium conditions. For the experimental group, alcohol intoxication was modeled by injecting a 40% ethanol solution at the rate of 12 mg/kg of body weight intragastric 4 times a day. The morphometric parameters of pinealocytes were studied on day 30 from the start of the study. According to the results of morphometric measurements, a significant increase in the parameters of light pinealocytes and a decrease in the parameters of dark cells were established. It was determined that the average values of the cytoplasm area of light pinealocytes increase by 54.55% (p<0.05), the area of the nucleus increases by 61.32% (p<0.05), and the area of the nucleolus by 32.84% (p<0.05) compared with the control group. The area of the cytoplasm of dark pinealocytes decreases by 27.2% (p<0.05), and the area of the nucleus by 37.33% (p<0.05). Changes in the ratio of light and dark pinealocytes were also noted. An increase in the number of active light cells by 8.17% was found. The detected morphometric changes indicate high functional activity of cells, which has a compensatory nature in response to apoptosis of pinealocytes.

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Section: Methodsmentioning

confidence: 99%