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<front>
<journal-meta>
<journal-id journal-id-type="publisher-id">Front. Cell Dev. Biol.</journal-id>
<journal-title>Frontiers in Cell and Developmental Biology</journal-title>
<abbrev-journal-title abbrev-type="pubmed">Front. Cell Dev. Biol.</abbrev-journal-title>
<issn pub-type="epub">2296-634X</issn>
<publisher>
<publisher-name>Frontiers Media S.A.</publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="doi">10.3389/fcell.2021.677595</article-id>
<article-categories>
<subj-group subj-group-type="heading">
<subject>Cell and Developmental Biology</subject>
<subj-group>
<subject>General Commentary</subject>
</subj-group>
</subj-group>
</article-categories>
<title-group>
<article-title>Commentary: Anti-tumor Effect of Oleic Acid in Hepatocellular Carcinoma Cell Lines <italic>via</italic> Autophagy Reduction</article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author" corresp="yes">
<name><surname>Lin</surname> <given-names>Jiong</given-names></name>
<xref ref-type="corresp" rid="c001"><sup>&#x0002A;</sup></xref>
<uri xlink:href="http://loop.frontiersin.org/people/1259097/overview"/>
</contrib>
</contrib-group>
<aff><institution>Department of Oncology, Affiliated Hospital of Guangdong Medical University</institution>, <addr-line>Zhanjiang</addr-line>, <country>China</country></aff>
<author-notes>
<fn fn-type="edited-by"><p>Edited by: Claudia Tanja Mierke, Leipzig University, Germany</p></fn>
<fn fn-type="edited-by"><p>Reviewed by: Wei Chen, Stanford University, United States</p></fn>
<corresp id="c001">&#x0002A;Correspondence: Jiong Lin <email>1150692210&#x00040;qq.com</email></corresp>
<fn fn-type="other" id="fn001"><p>This article was submitted to Cell Adhesion and Migration, a section of the journal Frontiers in Cell and Developmental Biology</p></fn></author-notes>
<pub-date pub-type="epub">
<day>13</day>
<month>04</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="collection">
<year>2021</year>
</pub-date>
<volume>9</volume>
<elocation-id>677595</elocation-id>
<history>
<date date-type="received">
<day>08</day>
<month>03</month>
<year>2021</year>
</date>
<date date-type="accepted">
<day>23</day>
<month>03</month>
<year>2021</year>
</date>
</history>
<permissions>
<copyright-statement>Copyright &#x000A9; 2021 Lin.</copyright-statement>
<copyright-year>2021</copyright-year>
<copyright-holder>Lin</copyright-holder>
<license xlink:href="http://creativecommons.org/licenses/by/4.0/"><p>This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.</p></license>
</permissions>
<related-article id="RA1" related-article-type="commentary-article" journal-id="Front. Cell Dev. Biol." journal-id-type="nlm-ta" vol="9" page="629182" xlink:href="33614661" ext-link-type="pubmed">A Commentary on <article-title>Anti-tumor Effect of Oleic Acid in Hepatocellular Carcinoma Cell Lines <italic>via</italic> Autophagy Reduction</article-title> by Giulitti, F., Petrungaro, S., Mandatori, S., Tomaipitinca, L., de Franchis, V., D&#x00027;Amore, A., et al. (2021). Front. Cell Dev. Biol. 9:629182. doi: <object-id>10.3389/fcell.2021.629182</object-id></related-article>
<kwd-group>
<kwd>oleic acid</kwd>
<kwd>hepatocellular carcinoma</kwd>
<kwd>invasion</kwd>
<kwd>cell death</kwd>
<kwd>migration</kwd>
</kwd-group>
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<ref-count count="2"/>
<page-count count="2"/>
<word-count count="637"/>
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</front>
<body>
<p>Recently, we read a paper in Frontiers in Cell and Developmental Biology &#x0201C;Anti-tumor Effect of Oleic Acid in Hepatocellular Carcinoma Cell Lines via Autophagy Reduction.&#x0201D; Oleic Acid (OA) may be a promising drug candidate for the treatment of hepatocellular carcinoma (HCC). However, some problems existing in this paper need to be commented.</p>
<p>With great interest we read a paper &#x0201C;Anti-tumor Effect of Oleic Acid in Hepatocellular Carcinoma Cell Lines via Autophagy Reduction&#x0201D; published in Frontiers in Cell and Developmental Biology (Giulitti et al., <xref ref-type="bibr" rid="B1">2021</xref>). Blocking autophagy suppresses the growth of HCC cells (Zai et al., <xref ref-type="bibr" rid="B2">2020</xref>). Authors indicated that OA induced cell death and reduced migration and invasion of the HCC cells, suggesting OA could be a promising drug candidate for the treatment of disease. However, some issues existing in this paper need to be commented.</p>
<p>In the paper, OA inhibited the invasion and migration of HCC cells after treatment with OA (300 &#x003BC;M) for 48 h (Figure 6). However, authors demonstrated that OA significantly suppressed cell proliferation and induced cell death of HCC cells after incubation with the same concentrations (300 &#x003BC;M) of OA for the same time (48 h) (Figures 3&#x02013;5). These results strongly suggested that the cause responsible for inhibition of migration and invasion of cells could be due to apoptosis induction of OA. Authors could treat the cells with OA at a lower concentration or for a short time when studying the inherent effects of drugs on the migration and invasion ability of cells without apoptosis induction. This made the results more convincing.</p>
<sec id="s1">
<title>Author Contributions</title>
<p>JL: study concept and design, data analysis, methodology, drafting manuscript, review and editing, and supervision.</p>
</sec>
<sec sec-type="COI-statement" id="conf1">
<title>Conflict of Interest</title>
<p>The author declares that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.</p>
</sec>
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<ref-list>
<title>References</title>
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<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Giulitti</surname> <given-names>F.</given-names></name> <name><surname>Petrungaro</surname> <given-names>S.</given-names></name> <name><surname>Mandatori</surname> <given-names>S.</given-names></name> <name><surname>Tomaipitinca</surname> <given-names>L.</given-names></name> <name><surname>de Franchis</surname> <given-names>V.</given-names></name> <name><surname>D&#x00027;Amore</surname> <given-names>A.</given-names></name> <etal/></person-group>. (<year>2021</year>). <article-title>Anti-tumor effect of oleic acid in hepatocellular carcinoma cell lines via autophagy reduction</article-title>. <source>Front. Cell Dev. Biol.</source> <volume>9</volume>:<fpage>629182</fpage>. <pub-id pub-id-type="doi">10.3389/fcell.2021.629182</pub-id><pub-id pub-id-type="pmid">33614661</pub-id></citation></ref>
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<citation citation-type="journal"><person-group person-group-type="author"><name><surname>Zai</surname> <given-names>W.</given-names></name> <name><surname>Chen</surname> <given-names>W.</given-names></name> <name><surname>Han</surname> <given-names>Y.</given-names></name> <name><surname>Wu</surname> <given-names>Z.</given-names></name> <name><surname>Fan</surname> <given-names>J.</given-names></name> <name><surname>Zhang</surname> <given-names>X.</given-names></name> <etal/></person-group>. (<year>2020</year>). <article-title>Targeting PARP and autophagy evoked synergistic lethality in hepatocellular carcinoma</article-title>. <source>Carcinogenesis</source> <volume>41</volume>, <fpage>345</fpage>&#x02013;<lpage>357</lpage>. <pub-id pub-id-type="doi">10.1093/carcin/bgz104</pub-id><pub-id pub-id-type="pmid">31175354</pub-id></citation></ref>
</ref-list>
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