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The effects of epithalon on the expression of the c-fos gene of «early response» in the subnuclei of the paraventricular nucleus of the hypothalamus under the conditions of permanent lighting

Authors: Bulyk, R. Ye.;

The effects of epithalon on the expression of the c-fos gene of «early response» in the subnuclei of the paraventricular nucleus of the hypothalamus under the conditions of permanent lighting

Abstract

The effect of epithalon on the state of the gene of an early immediate functional activity – c-fos in the subnuclei of the paraventricular nuclei (PVN) of the rat hypothalamus has been studied during different intervals of the circadian period (in the day-time and at night). The expression of the product of this gene – c-Fos protein – in the animals kept under normal conditions of alternating lighting and darkness demonstrated a rather clear – cut circadian pattern. A light stress results in marked desynchronosis. Against a background of permanent lighting synthetic tetrapeptide epithalon (0,5 µg/kg) caused a significant decrease (by 10,0 %) of the concentration of the immunospecific protein c-Fos at 14.00 hours, and at 02.00 a.m. – an increase (by 10,6 %) in relation to the animals subjected to the action of the light stressor without performing an epithalon correction.

Исследовано влияние эпиталона на состояние гена ранней функциональной активности c-fos в медиальных мелкоклеточных субъдрах паравентрикулярного ядра (ммПВЯ) гипоталамуса крыс в различные промежутки суток (днем и ночью). Экспрессия продукта этого гена – белка c-Fos – у животных, которых содержали в нормальных условиях чередования освещения и темноты демонстрировала довольно четкий циркадианный характер. Световой стресс приводит к выраженному десинхронозу. На фоне постоянного освещения синтетический тетрапептид эпиталон (0,5 мкг/кг), в 14.00 ч вызывал снижение (на 10,0 %) концентрации иммуноспецифического белка c-Fos, а в 02.00 ч повышение (на 10,6 %) показателя относительно крыс, содержавшихся в условиях светового стрессора без введения эпиталона.

Досліджено вплив епіталону на стан гена ранньої функціональної активності c-fos у суб’ядрах паравентрикулярного ядра (ПВЯ) гіпоталамуса щурів у різні проміжки доби (вдень і вночі). Експресія продукту цього гена – білка c-Fos – у тварин, котрі утримувалися в нормальних умовах чергування освітлення та темряви, демонструвала досить чіткий циркадіанний характер. Світловий стрес призводить до вираженого десинхронозу. На фоні постійного освітлення синтетичний тетрапептид епіталон (0,5 мкг/кг) о 14.00 год спричинив вірогідне зниження (на 10,0 %) концентрації імуноспецифічного білка c-Fos, а о 02.00 год підвищення (на 10,6 %) щодо тварин, яких піддали дії світлового стресора і корекцію епітанолом не проводили.

Keywords

ген с-fos; иммуноспецифический белок c-Fos; паравентрикулярное ядро гипоталамуса; постоянное освещение; эпиталон, ген с-fos; імуноспецифічний білок c-Fos; паравентрикулярне ядро гіпоталамуса; постійне освітлення; епіталон, c-fos gene; immunospecific c-Fos protein; hypothalamic paraventricular nucleus; permanent lighting; epithalon

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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