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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="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Russian Journal of Bioorganic Chemistry</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Bioorganic Chemistry</journal-title><trans-title-group xml:lang="ru"><trans-title>Биоорганическая химия</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0132-3423</issn><issn publication-format="electronic">1998-2860</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">683100</article-id><article-id pub-id-type="doi">10.31857/S0132342325010093</article-id><article-id pub-id-type="edn">LZBHYJ</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Analysis of the content of membrane lipids of bivalve mytilid mollusks and strongylocentrotid sea urchins with different life spans</article-title><trans-title-group xml:lang="ru"><trans-title>Анализ содержания мембранных липидов двустворчатых моллюсков – митилид – и шарообразных морских ежей с разной продолжительностью жизни</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Drozdov</surname><given-names>A. L.</given-names></name><name xml:lang="ru"><surname>Дроздов</surname><given-names>А. Л.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>anatoliyld@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Sikorskaya</surname><given-names>T. V.</given-names></name><name xml:lang="ru"><surname>Сикорская</surname><given-names>Т. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>anatoliyld@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Grigorchuk</surname><given-names>V. P.</given-names></name><name xml:lang="ru"><surname>Григорчук</surname><given-names>В. П.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>anatoliyld@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Zhirmunskii National Science Center of Marine Biology, Far East Branch, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Национальный научный центр морской биологии им. А.В. Жирмунского Дальневосточного отделения РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-02-15" publication-format="electronic"><day>15</day><month>02</month><year>2025</year></pub-date><volume>51</volume><issue>1</issue><issue-title xml:lang="ru"/><fpage>94</fpage><lpage>104</lpage><history><date date-type="received" iso-8601-date="2025-06-05"><day>05</day><month>06</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Российская академия наук</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/0132-3423/article/view/683100">https://journals.eco-vector.com/0132-3423/article/view/683100</self-uri><abstract xml:lang="en"><p>In order to understand whether the lipid composition of the plasma membrane is related to life expectancy, in this work we conducted a comparative study of the profiles of molecular species of four main classes of plasma membrane phospholipids (phosphatidylcholines (PC), phosphatidylethanolamines (PE), phosphatidylserines (PS) and phosphatidylinositols (PI)) for the long-lived mussel <italic>Crenomytilus grayanus</italic> and the long-lived sea urchin <italic>Mesocentrotus nudus</italic> and the short-lived mussel <italic>Mytilus trossulus</italic> and the sea urchin <italic>Strongylocentrotus intermedius</italic>. Molecular profiles of these membrane lipids were determined using high-performance liquid chromatography in combination with high-resolution mass spectrometry. In this work it was shown that the profile of PI molecular species is not related to the lifespan of mussels and hedgehogs, in contrast to the profile of PC, PE, and PS molecular species. Sea urchins <italic>M. nudus</italic> and mussel <italic>C. grayanus</italic> with a longer lifespan were characterized by an increased content of PC, PE and PS with odd numbered alkyl/acyl chains and molecular species with arachidonic acid (20:4<italic>n</italic>-6), a higher content of which can contribute to a better adaptation of the mussel of <italic>C. grayanus</italic> and the sea urchin <italic>M. nudus</italic> and thus contribute to a longer lifespan. The lipidomic approach to studying the gerontological problem using sea urchin and bivalves as an example has shown a clear relationship between the profile of molecular types of membrane lipids and lifespan. The exact mechanisms of this need to be clarified further.</p></abstract><trans-abstract xml:lang="ru"><p>Для того чтобы понять, связан ли липидный состав плазматической мембраны с продолжительностью жизни, в настоящей работе с помощью высокоэффективной жидкостной хроматографии в сочетании с масс-спектрометрией высокого разрешения мы провели сравнительное исследование профилей молекулярных видов четырех основных классов фосфолипидов плазматической мембраны: фосфатидилхолинов (ФХ), фосфатидилэтаноламинов (ФЭ), фосфатидилсеринов (ФС) и фосфатидилинозитолов (ФИ) – для долгоживущих мидии <italic>Crenomytilus grayanus</italic> и морского ежа <italic>Mesocentrotus nudus</italic>, короткоживущих мидии <italic>Mytilus trossulus</italic> и морского ежа<italic> Strongylocentrotus intermedius</italic>.<italic> </italic>Показано, что<italic> </italic>профиль молекулярных видов ФИ не связан с продолжительностью жизни мидий и ежей, в отличие от профиля молекулярных видов ФХ, ФЭ и ФС. Еж <italic>M. nudus </italic>и мидия <italic>C. grayanus </italic>с большей продолжительностью жизни отличались повышенным содержанием ФХ, ФЭ и ФС с алкильными/ацильными цепями с нечетным числом атомов углерода и молекулярных видов с арахидоновой кислотой (20:4<italic>n</italic>-6), большее содержание которой может способствовать лучшей адаптации мидии <italic>C. grayanus </italic>и ежа<italic> M. nudus</italic> и, таким образом, может быть связано с большей продолжительности жизни данных видов.</p></trans-abstract><kwd-group xml:lang="en"><kwd>plasma membrane lipids</kwd><kwd>high-performance liquid chromatography</kwd><kwd>high-resolution mass spectrometry</kwd><kwd>sea urchin</kwd><kwd>bivalvia-mytilids</kwd><kwd>Crenomytilus grayanus</kwd><kwd>Mytilus trossulus</kwd><kwd>Mesocentrotus nudus</kwd><kwd>Strongylocentrotus intermedius</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>липиды плазматических мембран</kwd><kwd>высокоэффективная жидкостная хроматография</kwd><kwd>масс-спектрометрия высокого разрешения</kwd><kwd>Crenomytilus grayanus</kwd><kwd>Mytilus trossulus</kwd><kwd>Mesocentrotus nudus</kwd><kwd>Strongylocentrotus intermedius</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Анисимов В.Н. // Молекулярные и физиологические механизмы старения. 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