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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Russian Journal of Biotherapy</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Biotherapy</journal-title><trans-title-group xml:lang="ru"><trans-title>Российский биотерапевтический журнал</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1726-9784</issn><issn publication-format="electronic">1726-9792</issn><publisher><publisher-name xml:lang="en">Publishing House ABV Press</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">1346</article-id><article-id pub-id-type="doi">10.17650/1726-9784-2022-21-3-34-39</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ORIGINAL REPORTS</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">CD437 increases the iron uptake by metastatic melanoma cells</article-title><trans-title-group xml:lang="ru"><trans-title>CD437 повышает захват железа клетками метастатической меланомы</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9342-5523</contrib-id><name-alternatives><name xml:lang="en"><surname>Vartanian</surname><given-names>A. A.</given-names></name><name xml:lang="ru"><surname>Вартанян</surname><given-names>А. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Amalia Artashevna Vartanian</p><p>24 Kashirskoe Shosse, Moscow 115522</p></bio><bio xml:lang="ru"><p>Амалия Арташевна Вартанян </p><p>115522 Москва, Каширское шоссе, 24</p></bio><email>zhivotov57@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8392-5495</contrib-id><name-alternatives><name xml:lang="en"><surname>Khochenkova</surname><given-names>Yu. A.</given-names></name><name xml:lang="ru"><surname>Хоченкова</surname><given-names>Ю. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>24 Kashirskoe Shosse, Moscow 115522</p></bio><bio xml:lang="ru"><p>115522 Москва, Каширское шоссе, 24</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8462-2178</contrib-id><name-alternatives><name xml:lang="en"><surname>Kosorukov</surname><given-names>V. S.</given-names></name><name xml:lang="ru"><surname>Косоруков</surname><given-names>В. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>24 Kashirskoe Shosse, Moscow 115522</p></bio><bio xml:lang="ru"><p>115522 Москва, Каширское шоссе, 24</p></bio><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">N.N. Blokhin National Medical Research Center of Oncology, Ministry of Health of Russia</institution></aff><aff><institution xml:lang="ru">ФГБУ «Национальный медицинский исследовательский центр онкологии им. Н.Н. Блохина» Минздрава России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-10-31" publication-format="electronic"><day>31</day><month>10</month><year>2022</year></pub-date><volume>21</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>34</fpage><lpage>39</lpage><history><date date-type="received" iso-8601-date="2022-10-30"><day>30</day><month>10</month><year>2022</year></date><date date-type="accepted" iso-8601-date="2022-10-30"><day>30</day><month>10</month><year>2022</year></date></history><permissions><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/></permissions><self-uri xlink:href="https://bioterapevt.abvpress.ru/jour/article/view/1346">https://bioterapevt.abvpress.ru/jour/article/view/1346</self-uri><abstract xml:lang="en"><p><bold>Background.</bold> CD437, an analog of vitamin A, is an agonist of the retinoic acid γ-receptor (RARγ). CD437 is also known to cause p53-independent DNA damage by a mechanism independent of the RAR-mediated pathway. In cancer patients, iron deficiency is constantly detect, the delivery of iron to tissues is also destroyed.<bold>Aim. </bold>To study the effect of CD437 on iron metabolism in metastatic melanoma cells, Mel Z.<bold>Materials and methods.</bold> In this study 2D cultivation of metastatic Mel Z melanoma cells, phase-contrast and fluorescence microscopy, flow cytofluorimetry were used.<bold>Results.</bold> In control cells without the addition of CD437 CD71, transferrin receptor, expressed 40 ± 4 % (p &lt;0.05) of Mel Z cells, in the presence of CD437 CD71 expression increased to 80 ± 6 %. Next, we have studied the expression of ferritin. Iron, which is not involved in cell metabolism, is bound by ferritin. In control experiments, ferritin was expressed by 84 ± 6 % (p &lt;0.05) of cells. When the cells grew in the presence of CD437, ferritin was expressed by all the cells (100 %, p &lt;0.05). Such a scenario indicates that CD437 may contribute to the accumulation of free, unbound iron in the cell, which can induce ferroptosis. In control experiments without the addition of CD437, the level of membranes lipid peroxidation, an indicator of ferroptosis, was insignificant. Lipid peroxidation induced by CD437 was 55 ± 5 % (p &lt;0.05) of the fluorescence intensity induced by erastin, positive control.<bold>Conclusion.</bold> CD437 increases the iron uptake by metastatic melanoma cells. The low level of membranes lipid peroxidation induced by CD437 does not allow it to be considered as an inducer of ferroptosis. Additional investigations are needed to find iron-binding targets alternative to ferritin.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Введение.</bold> CD437, аналог витамина А, является агонистом γ-рецептора ретиноевой кислоты (RARγ). Известно также, что CD437 вызывает р53-независимое повреждение ДНК с помощью механизма, независимого от пути, опосредованного RARγ. У онкологических больных очень часто обнаруживается дефицит железа, а также нарушена доставка железа к тканям.<bold>Цель исследования</bold> – изучение влияния CD437 на метаболизм железа в клетках метастатической меланомы.<bold>Материалы и методы</bold>. В  экспериментах были использованы: 2D-культивирование клеток метастатической меланомы Mel Z, фазово-контрастная и флуоресцентная микроскопия, проточная цитофлуориметрия.<bold>Результаты.</bold> В экспериментах с клетками меланомы линии Mel Z, не обработанными СD437 (контроль), рецептор трансферрина CD71 экспрессировали 40 ± 4 % клеток (p &lt;0,05), а при инкубации с СD437 количество клеток, экспрессирующих CD71, возрастало до 80 ± 6 % (p &lt;0,05). Далее мы исследовали экспрессию ферритина, связывающего железо, не участвующее в метаболизме клетки. В контрольных экспериментах ферритин экспрессировали 84 ± 6 % клеток (p &lt;0,05). При росте клеток в присутствии СD437 ферритин стали экспрессировать все клетки (100 %, p &lt;0,05). Подобный сценарий указывает на то, что СD437, по всей видимости, способствует накоплению в клетке свободного, несвязанного железа, которое может индуцировать ферроптоз. В контрольных экспериментах, без добавления CD437, уровень перекисного окисления липидов мембран, индикатора ферроптоза, был незначительным. Перекисное окисление липидов, индуцированное CD437, составляло 55 ± 5 % (p &lt;0,05) от интенсивности флуоресценции, индуцированной эрастином, положительным контролем.<bold>Заключение.</bold> CD437 повышает захват железа клетками метастатической меланомы. Низкий уровень перекисного окисления липидов мембран, индуцированного CD437, не  позволяет рассматривать его как  индуктор ферроптоза. Нужны дополнительные исследования для поиска мишеней, связывающих железо, альтернативных ферритину.</p></trans-abstract><kwd-group xml:lang="en"><kwd>melanoma</kwd><kwd>iron</kwd><kwd>CD437</kwd><kwd>CD71</kwd><kwd>ferritin</kwd><kwd>ferroptosis</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>меланома</kwd><kwd>железо</kwd><kwd>CD437</kwd><kwd>CD71</kwd><kwd>ферритин</kwd><kwd>ферроптоз</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The authors thank M. Baryshnikova and D. Khochenkov for valuable comments and critical reading the manuscript. This work was carried out with the financial support of experimental scientific development program № АААА-А20-120031190017-7 “Development and preclinical study of the drug BEL400 for tumor therapy”.</funding-statement><funding-statement xml:lang="ru">Авторы благодарят М.А. Барышникову и Д.А. Хоченкова за помощь в обсуждении результатов. 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