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 <front>
  <journal-meta>
   <journal-id journal-id-type="publisher-id">Medical Radiology and radiation safety</journal-id>
   <journal-title-group>
    <journal-title xml:lang="en">Medical Radiology and radiation safety</journal-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Медицинская радиология и радиационная безопасность</trans-title>
    </trans-title-group>
   </journal-title-group>
   <issn publication-format="print">1024-6177</issn>
   <issn publication-format="online">2618-9615</issn>
  </journal-meta>
  <article-meta>
   <article-id pub-id-type="publisher-id">44219</article-id>
   <article-id pub-id-type="doi">10.12737/1024-6177-2021-66-1-5-12</article-id>
   <article-categories>
    <subj-group subj-group-type="toc-heading" xml:lang="ru">
     <subject>Радиационная биология</subject>
    </subj-group>
    <subj-group subj-group-type="toc-heading" xml:lang="en">
     <subject>Radiation biology</subject>
    </subj-group>
    <subj-group>
     <subject>Радиационная биология</subject>
    </subj-group>
   </article-categories>
   <title-group>
    <article-title xml:lang="en">Radiation-Induced Changes in Nucleic Acids of Brain Neurons</article-title>
    <trans-title-group xml:lang="ru">
     <trans-title>РАДИАЦИОННО-ИНДУЦИРОВАННЫЕ ИЗМЕНЕНИЯ СОДЕРЖАНИЯ ДНК И РНК В НЕЙРОНАХ ГОЛОВНОГО МОЗГА</trans-title>
    </trans-title-group>
   </title-group>
   <contrib-group content-type="authors">
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Ушаков</surname>
       <given-names>И. Б.</given-names>
      </name>
      <name xml:lang="en">
       <surname>Ushakov</surname>
       <given-names>I. B.</given-names>
      </name>
     </name-alternatives>
     <bio xml:lang="ru">
      <p>доктор медицинских наук;</p>
     </bio>
     <bio xml:lang="en">
      <p>doctor of medical sciences;</p>
     </bio>
     <xref ref-type="aff" rid="aff-1"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Федоров</surname>
       <given-names>Владимир Петрович</given-names>
      </name>
      <name xml:lang="en">
       <surname>Fyodorov</surname>
       <given-names>Vladimir Petrovich</given-names>
      </name>
     </name-alternatives>
     <xref ref-type="aff" rid="aff-2"/>
    </contrib>
   </contrib-group>
   <aff-alternatives id="aff-1">
    <aff>
     <institution xml:lang="ru">Федеральный медицинский биофизический центр им. А.И. Бурназяна ФМБА России</institution>
     <city>Москва</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">A.I. Burnasyan Federal Medical Biophysical Center of FMBA</institution>
     <city>Moscow</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-2">
    <aff>
     <institution xml:lang="ru">Федеральный медицинско-биофизический центр им. А.И. Бурназяна ФМБА России, Москва</institution>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">A.I. Burnasyan Federal Medical Biophysical Center, Moscow, Russia</institution>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <volume>66</volume>
   <issue>1</issue>
   <fpage>5</fpage>
   <lpage>12</lpage>
   <self-uri xlink:href="https://naukaru.ru/en/nauka/article/44219/view">https://naukaru.ru/en/nauka/article/44219/view</self-uri>
   <abstract xml:lang="ru">
    <p>Цель: Исследование радиационно-индуцированных изменений содержания нуклеиновых кислот в нейронах головного мозга после воздействия ионизирующего излучения в дозах 0,1 – 1,0 Гр.&#13;
Материал и методы. Исследование с соблюдением правил биоэтики выполнено на 240 белых беспородных крысах-самцах в возрасте 4 мес к началу эксперимента, подвергшихся однократному воздействию γ-квантами 60Со в дозах 0,1–1,0 Гр. Нейроморфологическими методиками оценивали морфометрические и тинкториальные показатели нервных клеток, а также динамику изменения содержания нуклеиновых кислот в нейронах в течение всей продолжительности жизни животных. Статистическую обработку результатов проводили с помощью пакетов программ Statistica 6.1 и с использованием параметрических критериев.&#13;
Результаты: У контрольных и облученных животных на протяжении всей жизни происходят волнообразные изменения содержания нуклеиновых кислот в нейронах головного мозга с постепенным снижением показателей к окончанию эксперимента. При этом изменения уровня ДНК в ядрах и РНК в ядрышках, как правило, связаны с изменениями размеров структур их локализации, а содержание РНК в цитоплазме, видимо, связано с изменениями физиологического состояния нейронов (покой, возбуждение, торможение) и соответствующей структурно-функциональной перестройкой нервных клеток. Изменения нуклеиновых кислот не имеют линейной дозовой и временной зависимости от исследованных факторов. В конце эксперимента, когда наблюдается гибель как облученных, так и контрольных животных, содержание нуклеиновых кислот в нейронах статистически значимо снижается во всех группах причем в большей степени у облученных животных.&#13;
Заключение: Не выявлено функционально-значимых радиационно-индуцированных изменений содержания и топохимии продуктов гистохимических реакций с нуклеиновыми кислотами в структурах нейронов головного мозга. Однако в отдельные сроки наблюдения содержание нуклеиновых кислот в нейронах у облученных животных изменяется в большей степени, чем у животных возрастного контроля.</p>
   </abstract>
   <trans-abstract xml:lang="en">
    <p>Purpose: Study of radiation-induced changes in the content of nucleic acids in neurons of the brain after exposure to ionizing radiation in doses of 0.1 – 1.0 Gy.&#13;
Material and methods. The study was carried out in compliance with the rules of bioethics on 240 white outbred male rats at the age of 4 months. by the beginning of the experiment, exposed to a single exposure to γ-radiation of 60Co in doses of  0.1–1.0 Gy. Neuromorphological methods were used to assess morphometric and tinctorial parameters of nerve cells, as well as the dynamics of changes in the content of nucleic acids in neurons during the entire life span of animals. Statistical processing of the results was carried out using the Statistica 6.1 software packages, using parametric criteria.&#13;
Results: In control and irradiated animals throughout their life, there are undulating changes in the content of nucleic acids in the neurons of the brain with a gradual decrease in indicators by the end of the experiment. At the same time, changes in the level of DNA in the nuclei and RNA in the nucleoli are usually associated with changes in the size of the structures of their localization, and the RNA content in the cytoplasm is apparently associated with changes in the physiological state of neurons (rest, excitation, inhibition) and the corresponding structural and functional rearrangement of nerve cells. Nucleic acid changes do not have a linear dose and time dependence on the factors investigated. At the end of the experiment, when death of both irradiated and control animals is observed, the content of nucleic acids in neurons is statistically significantly reduced in all groups, and to a greater extent in irradiated animals.&#13;
Conclusion: No functionally significant radiation-induced changes in the content and topochemistry of the products of histochemical reactions were revealed in the detection of nucleic acids in the structures of brain neurons. However, in some periods of observation, the content of nucleic acids in neurons in irradiated animal’s changes to a greater extent than in animals of age control.</p>
   </trans-abstract>
   <kwd-group xml:lang="ru">
    <kwd>радиация</kwd>
    <kwd>малые и средние дозы</kwd>
    <kwd>головной мозг</kwd>
    <kwd>нейроны</kwd>
    <kwd>морфометрические показатели РНК</kwd>
    <kwd>ДНК</kwd>
   </kwd-group>
   <kwd-group xml:lang="en">
    <kwd>radiation</kwd>
    <kwd>low and moderate doses</kwd>
    <kwd>brain</kwd>
    <kwd>neurons</kwd>
    <kwd>morphometric parameters</kwd>
    <kwd>RNA</kwd>
    <kwd>DNA</kwd>
   </kwd-group>
  </article-meta>
 </front>
 <body>
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