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<article xml:lang="en" article-type="expression-of-concern" xmlns:xlink="http://www.w3.org/1999/xlink">
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<front>
<journal-meta>
<journal-id journal-id-type="publisher-id">IJMM</journal-id>
<journal-title-group>
<journal-title>International Journal of Molecular Medicine</journal-title></journal-title-group>
<issn pub-type="ppub">1107-3756</issn>
<issn pub-type="epub">1791-244X</issn>
<publisher>
<publisher-name>D.A. Spandidos</publisher-name></publisher></journal-meta>
<article-meta>
<article-id pub-id-type="doi">10.3892/ijmm.2026.5880</article-id>
<article-id pub-id-type="publisher-id">ijmm-58-02-05880</article-id>
<article-categories>
<subj-group>
<subject>Expression of Concern</subject></subj-group></article-categories>
<title-group>
<article-title>[Expression of Concern] Novel insights into the role of HSP90 in cytoprotection of H<sub>2</sub>S against chemical hypoxia-induced injury in H9c2 cardiac myocytes</article-title></title-group>
<contrib-group>
<contrib contrib-type="author">
<name><surname>Yang</surname><given-names>Zhanli</given-names></name></contrib>
<contrib contrib-type="author">
<name><surname>Yang</surname><given-names>Chuntao</given-names></name></contrib>
<contrib contrib-type="author">
<name><surname>Xiao</surname><given-names>Liangcan</given-names></name></contrib>
<contrib contrib-type="author">
<name><surname>Liao</surname><given-names>Xinxue</given-names></name></contrib>
<contrib contrib-type="author">
<name><surname>Lan</surname><given-names>Aiping</given-names></name></contrib>
<contrib contrib-type="author">
<name><surname>Wang</surname><given-names>Xiuyu</given-names></name></contrib>
<contrib contrib-type="author">
<name><surname>Guo</surname><given-names>Ruixian</given-names></name></contrib>
<contrib contrib-type="author">
<name><surname>Chen</surname><given-names>Peixi</given-names></name></contrib>
<contrib contrib-type="author">
<name><surname>Hu</surname><given-names>Chengheng</given-names></name></contrib>
<contrib contrib-type="author">
<name><surname>Feng</surname><given-names>Jianqiang</given-names></name></contrib></contrib-group>
<pub-date pub-type="collection">
<month>08</month>
<year>2026</year></pub-date>
<pub-date pub-type="epub">
<day>03</day>
<month>06</month>
<year>2026</year></pub-date>
<volume>58</volume>
<issue>2</issue>
<elocation-id>209</elocation-id>
<permissions>
<copyright-statement>Copyright: &#x000A9; 2026 Yang et al.</copyright-statement>
<copyright-year>2026</copyright-year>
<license license-type="open-access">
<license-p>This is an open access article distributed under the terms of the <ext-link ext-link-type="uri" xlink:href="https://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution License</ext-link>, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.</license-p></license></permissions></article-meta></front>
<body>
<p>Int J Mol Med 28: <related-article id="RA1" related-article-type="object-of-concern" vol="28" page="397" ext-link-type="doi" xlink:href="10.3892/ijmm.2011.682">397-403</related-article>, 2011; DOI: 10.3892/ijmm.2011.682</p>
<p>Following the publication of this paper, and an Expression of Concern statement that was published to draw attention to the fact that the Editorial Office are in the process of consulting the authors regarding the fact that the photos shown in Fig. 5B and D were apparently matching images (doi: 10.3892/ijmm.2025.5618), we have been contacted again by another reader who has highlighted that Fig. 5C and F also contain an overlapping section, albeit that the image has been rotated through 90&#x000B0; and flipped vertically in panel (F).</p>
<p>We have contacted the authors again, asking them to provide an explanation for the apparent anomalies in the presentation of Fig. 5 in this paper, although up to this time, no response from them has been forthcoming. Owing to the fact that the Editorial Office has been made aware of these potential issues surrounding the scientific integrity of this paper, we are issuing a second Expression of Concern statement to notify readers of this potential problem while the Editorial Office continues to investigate this matter further.</p></body></article>
