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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">Current Protein &amp; Peptide Science</journal-id><journal-title-group><journal-title xml:lang="en">Current Protein &amp; Peptide Science</journal-title><trans-title-group xml:lang="ru"><trans-title>Current Protein &amp; Peptide Science</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1389-2037</issn><issn publication-format="electronic">1875-5550</issn><publisher><publisher-name xml:lang="en">Bentham Science</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">645554</article-id><article-id pub-id-type="doi">10.2174/0113892037269116231115065458</article-id><article-categories><subj-group subj-group-type="toc-heading"><subject>Life Sciences</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">Markers of Oxidative Stress and Tyrosinase Activity in Melasma Patients: A Biochemical Investigation</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Katiyar</surname><given-names>Shweta</given-names></name><email>info@benthamscience.net</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name><surname>Yadav</surname><given-names>Dhananjay</given-names></name><email>info@benthamscience.net</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name><surname>Singh</surname><given-names>Sanjeev K.</given-names></name><email>info@benthamscience.net</email><xref ref-type="aff" rid="aff3"/></contrib></contrib-group><aff id="aff1"><institution>Department of Biochemistry, SBN Govt PG College</institution></aff><aff id="aff2"><institution>Department of Medical Biotechnology, Yeungnam University</institution></aff><aff id="aff3"><institution>Department of Biochemistry, GR Medical College,</institution></aff><pub-date date-type="pub" iso-8601-date="2024-02-01" publication-format="electronic"><day>01</day><month>02</month><year>2024</year></pub-date><volume>25</volume><issue>2</issue><issue-title xml:lang="ru"/><fpage>183</fpage><lpage>188</lpage><history><date date-type="received" iso-8601-date="2025-01-11"><day>11</day><month>01</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Bentham Science Publishers</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Bentham Science Publishers</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/></permissions><self-uri xlink:href="https://journals.eco-vector.com/1389-2037/article/view/645554">https://journals.eco-vector.com/1389-2037/article/view/645554</self-uri><abstract xml:lang="en"><p id="idm46466589684608">Background:Melasma, oxidative stress, tyrosinase, antioxidants, Homogenized skin tissues, hyperpigmentation disease.</p><p id="idm46466589690352">Aims:To compare the levels of oxidative stress and tyrosinase activity in melasma patients with healthy volunteers.</p><p id="idm46466589696496">Methods:After written consent, 130 patients were enrolled in a casecontrol study. 65 cases were of melasma disorder, and 65 were served as control. Homogenized skin tissues were taken and used to estimate superoxide dismutase (SOD), catalase (CAT), reduced glutathione (GSH), glutathione peroxidase (GPx) (antioxidants), malondialdehyde (MDA) and tyrosine hydroxylase (TH).</p><p id="idm46466589705904">Results:Melasma patients had lower basal levels of systemic antioxidants than healthy subjects. Tyrosinase activity was shown to be greater in lesional skin than in non-lesional skin. In controls, there was a good positive relationship between TH and MDA and an excellent negative relationship between GPx and GSH. In melasma patients, there were significant associations between CAT, GPx, SOD and MDA.</p><p id="idm46466589713536">Conclusions:Increased oxidative stress may affect tyrosinase activity and eumelanin synthesis via the anabolic pathway of melanin synthesis, according to our findings. In conclusion, we discovered a negative relationship between antioxidants and tyrosinase activity.</p></abstract><kwd-group xml:lang="en"><kwd>Melasma</kwd><kwd>oxidative stress</kwd><kwd>tyrosinase</kwd><kwd>antioxidants</kwd><kwd>Homogenized skin tissues</kwd><kwd>hyperpigmentation disease.</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Ogbechie-Godec, O.A.; Elbuluk, N. Melasma: An up-to-date comprehensive review. Dermatol. Ther. (Heidelb.), 2017, 7(3), 305-318. doi: 10.1007/s13555-017-0194-1 PMID: 28726212</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Basit, H.; Godse, K.V.; Al Aboud, A.M. Melasma; StatPearls Publications: Treasure Island (FL), 2022.</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Tomar, A.; Purohit, S.; Gaur, K.; Kaur, M.; Kashyap, A. A case series of 500 melasma cases: A descriptive study. 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