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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">nefr</journal-id><journal-title-group><journal-title xml:lang="ru">Нефрология</journal-title><trans-title-group xml:lang="en"><trans-title>Nephrology (Saint-Petersburg)</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-6274</issn><issn pub-type="epub">2541-9439</issn><publisher><publisher-name>Pavlov First Saint-Petersburg State Medical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.24884/1561-6274-2006-10-2-77-80</article-id><article-id custom-type="elpub" pub-id-type="custom">nefr-568</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ СТАТЬИ. ЭКСПЕРИМЕНТАЛЬНЫЕ ИССЛЕДОВАНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL ARTICLES. EXPERIMENTAL INVESTIGATION</subject></subj-group></article-categories><title-group><article-title>ВЛИЯНИЕ ЦИРКАДНЫХ РИТМОВ НА ВЫРАЖЕННОСТЬ ДИУРЕТИЧЕСКОГО ЭФФЕКТА ФУРОСЕМИДА У КРЫС</article-title><trans-title-group xml:lang="en"><trans-title>THE INFLUENCE OF CIRCADIAN RHYTHMS ON THE DEGREE OF A DIURETIC EFFECT OF FUROSEMIDE IN RATS</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зверев</surname><given-names>Я. Ф.</given-names></name><name name-style="western" xml:lang="en"><surname>Zverev</surname><given-names>Ya. F.</given-names></name></name-alternatives><bio xml:lang="ru"><p>кафедра фармакологии</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Брюханов</surname><given-names>В. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Bryukhanov</surname><given-names>V. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>кафедра фармакологии</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>Алтайский государственный медицинский университет, г. Барнаул</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2006</year></pub-date><pub-date pub-type="epub"><day>10</day><month>02</month><year>2006</year></pub-date><volume>10</volume><issue>2</issue><fpage>77</fpage><lpage>80</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Зверев Я.Ф., Брюханов В.М., 2006</copyright-statement><copyright-year>2006</copyright-year><copyright-holder xml:lang="ru">Зверев Я.Ф., Брюханов В.М.</copyright-holder><copyright-holder xml:lang="en">Zverev Y.F., Bryukhanov V.M.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://journal.nephrolog.ru/jour/article/view/568">https://journal.nephrolog.ru/jour/article/view/568</self-uri><abstract><p>ЦЕЛЬ ИССЛЕДОВАНИЯ. Нас заинтересовал вопрос о возможной флюктуации эффекта диуретиков, препаратов, которые также широко применяются в кардиологической клинике в зависимости от суточных ритмов у крыс. МАТЕРИАЛ И МЕТОДЫ. Исследовали возможность флюктуации фармакологического эффекта фуросемида (20 мг/кг внутрибрюшинно) в зависимости от суточных биоритмов у крыс массой 200-250 г. Оценивали эффект препарата после введения в 12 часов дня и в 12 часов ночи. На протяжении суток каждые 6 часов измеряли диурез, экскрецию натрия, калия и креатинина. Затем действие фуросемида исследовали у крыс, половина из которых на протяжении 7 суток находилась в темном помещении, половина – в условиях воздействия дневного освещения. В третьей серии экспериментов в течение 7 суток извращали циркадную ритмичность, помещая животных днем на 12 часов в темное помещение, а ночью включая свет. Части животных вводили препарат в 12 часов дня, части – в 12 часов ночи. РЕЗУЛЬТАТЫ. У крыс, получавших диуретик в 12 часов дня, уровень суточного мочеотделения был примерно на 40%, а экскреции Na+ -  на 30% выше, чем у животных, которым фуросемид вводили в 12 часов ночи. Отмеченный прирост обеспечивался в ночное время, поскольку в первые 6 часов после введения различий в действии препарата не наблюдалось. Введение фуросемида крысам, длительно находившимся в темноте, приводило к развитию диуреза и натрийуреза, которые на те же 30-40% превосходили влияние препарата у крыс, пребывавших на свету. В условиях извращения циркадной ритмичности различий в диуретическом и натрийуретическом эффектах фуросемида не выявлялось, т.е. флюктуация действия в зависимости от суточного ритма исчезала. Попутно было выявлено резкое увеличение суточной экскреции Na+ у животных, длительное время пребывавших на свету и в условиях извращенных циркадных ритмов. Повидимому, это объясняется стрессовым воздействием длительной световой экспозиции и изменения циркадной ритмичности на экскрецию натрия у ночных животных крыс. ЗАКЛЮЧЕНИЕ. Зафиксированные эффекты, вероятно, обусловлены вовлечением регуляторных возможностей эпифиза и супрахиазматических ядер гипоталамуса посредством дофамина и мелатонина, а также изменением функционирования симпатической системы и оси гипоталамус-гипофиз-надпочечники.</p></abstract><trans-abstract xml:lang="en"><p>THE AIM of the investigation was to analyze the question of possible fluctuation of the effect of diuretics, drugs that are also widely used in cardiologic clinics, depending on the circadian biorhythms in rats. MATERIAL AND METHODS. Furosemide was injected intraperitoneally (20 mg/kg) to rats weighing 200-250 g. Effect of the drug following the injection was assessed at 12pm and at 12 am. Diuresis, excretion of Na+ , K+ and creatinine were measured every 6 hours during a day. Then effects of furosemide were investigated in rats, half of which were kept in the dark during 7 hours, and another half – in the light. In the third series of experiments the biorhythms were distorted: the animals were placed in the dark for 12 hours in the daytime, and at night the light was switched on. Part of the animals was given the drug at 12 a.m., the other part – at 12 p.m. RESULTS. The rats given the diuretic at noon had the level of diurnal urination about 40%, and excretion of Na+ about 30% higher, than in the animals given firosemide at midnight. The growth noted took place at night, since no difference in the action of the drug was observed during the first 6 hours after injection. Injection of furosemide to the rats long kept in the dark resulted in the development of diuresis and natriuresis, that were the same 30-40% higher than the action of the drug in the rats kept in the light. Under conditions of the distorted circadian rhythm no differences in the diuretic and natriuretic effects of furosemide were detected, since the fluctuation depending on the circadian rhythm disappeared. At the same time, sharply increased diurnal excretion of Na+ was noted in animals kept in the light over a long period of time and under conditions of distorted biorhythms. It might be explained by stress effects of a continuous exposure to light and of changed circadian rhythms on sodium excretion in nocturnal animals – rats. CONCLUSION. The effects observed appear to be due to the involvement of regulatory properties of epiphysis and suprachiasmic nuclei of the hypothalamus by means of dophamine and melatonin, as well as to changed formation of the sympathetic system and the hypothalamus-hypophysis-adrenals axis.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>функция почек</kwd><kwd>циркадные ритмы</kwd><kwd>эффекты фуросемида</kwd></kwd-group><kwd-group xml:lang="en"><kwd>kidney function</kwd><kwd>circadian rhythms</kwd><kwd>effects of furisemide</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Арушанян ЭБ. Хронофармакология. Изд. СГМА, Ставрополь, 2000; 357-362</mixed-citation><mixed-citation xml:lang="en">Арушанян ЭБ. Хронофармакология. Изд. 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