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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">Acta Naturae</journal-id><journal-title-group><journal-title xml:lang="en">Acta Naturae</journal-title><trans-title-group xml:lang="ru"><trans-title>Acta Naturae</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2075-8251</issn><publisher><publisher-name xml:lang="en">Acta Naturae Ltd</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">19426</article-id><article-id pub-id-type="doi">10.32607/actanaturae.19426</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Research Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Экспериментальные 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">Membrane Partitioning of TEMPO Discriminates Human Lung Cancer from Neighboring Normal Cells</article-title><trans-title-group xml:lang="ru"><trans-title/></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gasymov</surname><given-names>O. K.</given-names></name><name xml:lang="ru"><surname>Gasymov</surname><given-names>O.  К.</given-names></name></name-alternatives><address><country country="AZ">Azerbaijan</country></address><email>oktaygasimov@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name><surname>Bakhishova</surname><given-names>M. J.</given-names></name><address><country country="AZ">Azerbaijan</country></address><email>matanat.baxishova93@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name><surname>Aslanov</surname><given-names>R. B.</given-names></name><address><country country="AZ">Azerbaijan</country></address><email>rab_qaya@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name><surname>Melikova</surname><given-names>L. A.</given-names></name><address><country country="AZ">Azerbaijan</country></address><email>Lmelikova20027@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name><surname>Aliyev</surname><given-names>J. A.</given-names></name><address><country country="AZ">Azerbaijan</country></address><email>oncology.az@mail.com</email><xref ref-type="aff" rid="aff3"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Institute of Biophysics, Ministry of Science and Education Republic of Azerbaijan</institution></aff><aff><institution xml:lang="ru"></institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">National Center of Oncology, Azerbaijan Republic Ministry of Health</institution></aff><aff><institution xml:lang="ru"></institution></aff></aff-alternatives><aff id="aff3"><institution>National Center of Oncology, Azerbaijan Republic Ministry of Health</institution></aff><pub-date date-type="pub" iso-8601-date="2023-12-18" publication-format="electronic"><day>18</day><month>12</month><year>2023</year></pub-date><volume>15</volume><issue>4</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>111</fpage><lpage>120</lpage><history><date date-type="received" iso-8601-date="2023-05-05"><day>05</day><month>05</month><year>2023</year></date><date date-type="accepted" iso-8601-date="2023-10-12"><day>12</day><month>10</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Gasymov O.K., Bakhishova M.J., Aslanov R.B., Melikova L.A., Aliyev J.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Касумов O.К., Бахишова М.Д., Асланов Р.Б., Меликова Л.A., Алиев Д.А.</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Gasymov O.K., Bakhishova M.J., Aslanov R.B., Melikova L.A., Aliyev J.A.</copyright-holder><copyright-holder xml:lang="ru">Касумов O.К., Бахишова М.Д., Асланов Р.Б., Меликова Л.A., Алиев Д.А.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://actanaturae.ru/2075-8251/article/view/19426">https://actanaturae.ru/2075-8251/article/view/19426</self-uri><abstract xml:lang="en"><p>The plasma membranes of normal and cancer cells of the lung, breast, and colon tissues show considerably different lipid compositions that greatly influence their physicochemical properties. Partitioning of the spin probe 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) into the membranes of human lung normal and carcinoma cells was assessed by EPR spectroscopy to estimate the impact of the lipid compositions. The goal was to reveal potential strategies for cancer therapy attributable to the membrane properties. The study was conducted at pH values of 7.3 and 6.2, relevant to the microenvironments of normal and cancer cells, respectively. The TEMPO partitioning was examined in the temperature interval of 283–317K to reveal the efficacy of local hyperthermia used in chemotherapy. Results indicate that the TEMPO partitioning coefficient for the membranes of human lung carcinoma cells is significantly higher compared with that of neighboring normal cells. Increased partition coefficients were observed at relatively higher temperatures in both normal and cancer cells. However, compared to the normal cells, the cancer cells demonstrated higher partition coefficients in the studied temperature range. The data obtained with C12SL (spin-labeled analog of lauric acid) indicate that increased membrane dynamics of the cancer cells is a possible mechanism for enhanced partitioning of TEMPO. Free energy values for partitioning estimated for pH values of 6.2 and 7.3 show that TEMPO partitioning requires 30% less energy in the cancer cells at pH 7.3. TEMPO and its derivatives have previously been considered as theranostic agents in cancer research. Data suggest that TEMPO derivatives could be used to test if complementary alkalization therapy is effective for cancer patients receiving standard chemotherapy with local hyperthermia.</p></abstract><trans-abstract xml:lang="ru"><p/></trans-abstract><kwd-group xml:lang="en"><kwd>electron paramagnetic resonance</kwd><kwd>TEMPO partitioning</kwd><kwd>lung carcinoma</kwd><kwd>cell membrane lipid composition</kwd><kwd>cell membrane sensitivity</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="en">Azerbaijan Science Foundation</institution></institution-wrap><institution-wrap><institution xml:lang="ru">Azerbaijan Science Foundation</institution></institution-wrap></funding-source><award-id>EİF-MQM-ETS-2020-1(35)-08/07/3-M-07</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Meacham C.E., Morrison S.J. // Nature. 2013. V. 501. № 7467. 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