Volume-regulated chloride channel regulates cell proliferation and is involved in the possible interaction between TMEM16A and LRRC8A in human metastatic oral squamous cell carcinoma cells

Volume-regulated anion channels (VRACs), expressed in various cells, play an important role in cell volume regulation. Despite being physiologically defined almost half a century ago, only the molecular candidates of VRAC, TMEM16A, LRRC8A, and bestrophin-1 (BEST1), are known. Here, we aimed to explo...

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Veröffentlicht in:European journal of pharmacology 2021-03, Vol.895, p.173881-173881, Article 173881
Hauptverfasser: Yoshimoto, Shohei, Matsuda, Miho, Kato, Kenichi, Jimi, Eijiro, Takeuchi, Hiroshi, Nakano, Shuji, Kajioka, Shunichi, Matsuzaki, Etsuko, Hirofuji, Takao, Inoue, Ryuji, Hirata, Masato, Morita, Hiromitsu
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container_title European journal of pharmacology
container_volume 895
creator Yoshimoto, Shohei
Matsuda, Miho
Kato, Kenichi
Jimi, Eijiro
Takeuchi, Hiroshi
Nakano, Shuji
Kajioka, Shunichi
Matsuzaki, Etsuko
Hirofuji, Takao
Inoue, Ryuji
Hirata, Masato
Morita, Hiromitsu
description Volume-regulated anion channels (VRACs), expressed in various cells, play an important role in cell volume regulation. Despite being physiologically defined almost half a century ago, only the molecular candidates of VRAC, TMEM16A, LRRC8A, and bestrophin-1 (BEST1), are known. Here, we aimed to explore the functional significance of VRAC in, HST-1, an oral squamous cell carcinoma (OSCC) cell line. Cell proliferation assays, RT-PCR, Western blot, and flow cytometry were used to estimate changes in gene expression and cell proliferation. Ion channel activity was recorded using the patch-clamp technique. Specific genes were knocked-down by siRNA assays. VRAC, identified as a hypotonicity-induced current, was highly functional and associated with the proliferation of HST-1 cells but not of HaCaT (a normal keratinocyte) cells. The pharmacological profile of VRAC in HST-1 was similar to that reported previously. DCPIB, a specific VRAC inhibitor, completely inhibited VRAC and proliferation of HST-1 cells, eventually leading to apoptosis. VRAC in HST-1 was attenuated by the knockdown of TMEM16A and LRRC8A, while knockdown of BEST1 affected cell proliferation. In situ proximity ligation assay showed that TMEM16A and LRRC8A co-localized under isotonic conditions (300 mOsM) but were separated under hypotonic conditions (250 mOsM) on the plasma membrane. We have found that VRAC acts to regulate the proliferation of human metastatic OSCC cells and the composition of VRAC may involve in the interactions between TMEM16A and LRRC8A in HST-1 cells. •We aimed to identify the functional significance of volume-regulated anion channels (VRAC) in human OSCC cells.•VRAC in HST-1 likely involves the functional interaction of TMEM16A and LRRC8A, regulating the proliferative potential.•DCPIB, a specific VRAC inhibitor, suppressed both VRAC and the proliferation of HST-1 cells.
doi_str_mv 10.1016/j.ejphar.2021.173881
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Despite being physiologically defined almost half a century ago, only the molecular candidates of VRAC, TMEM16A, LRRC8A, and bestrophin-1 (BEST1), are known. Here, we aimed to explore the functional significance of VRAC in, HST-1, an oral squamous cell carcinoma (OSCC) cell line. Cell proliferation assays, RT-PCR, Western blot, and flow cytometry were used to estimate changes in gene expression and cell proliferation. Ion channel activity was recorded using the patch-clamp technique. Specific genes were knocked-down by siRNA assays. VRAC, identified as a hypotonicity-induced current, was highly functional and associated with the proliferation of HST-1 cells but not of HaCaT (a normal keratinocyte) cells. The pharmacological profile of VRAC in HST-1 was similar to that reported previously. DCPIB, a specific VRAC inhibitor, completely inhibited VRAC and proliferation of HST-1 cells, eventually leading to apoptosis. VRAC in HST-1 was attenuated by the knockdown of TMEM16A and LRRC8A, while knockdown of BEST1 affected cell proliferation. In situ proximity ligation assay showed that TMEM16A and LRRC8A co-localized under isotonic conditions (300 mOsM) but were separated under hypotonic conditions (250 mOsM) on the plasma membrane. 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VRAC in HST-1 was attenuated by the knockdown of TMEM16A and LRRC8A, while knockdown of BEST1 affected cell proliferation. In situ proximity ligation assay showed that TMEM16A and LRRC8A co-localized under isotonic conditions (300 mOsM) but were separated under hypotonic conditions (250 mOsM) on the plasma membrane. 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Matsuda, Miho ; Kato, Kenichi ; Jimi, Eijiro ; Takeuchi, Hiroshi ; Nakano, Shuji ; Kajioka, Shunichi ; Matsuzaki, Etsuko ; Hirofuji, Takao ; Inoue, Ryuji ; Hirata, Masato ; Morita, Hiromitsu</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c428t-c008d23884918eec4cceb6c5e0cb968ea6806ae25e59869e3d2ac2b151797d2f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Anoctamin-1 - antagonists &amp; inhibitors</topic><topic>Anoctamin-1 - genetics</topic><topic>Anoctamin-1 - metabolism</topic><topic>Antineoplastic Agents - pharmacology</topic><topic>Apoptosis</topic><topic>Bestrophins - genetics</topic><topic>Bestrophins - metabolism</topic><topic>Cell Line, Tumor</topic><topic>Cell proliferation</topic><topic>Cell Proliferation - drug effects</topic><topic>Chloride Channels - antagonists &amp; inhibitors</topic><topic>Chloride Channels - genetics</topic><topic>Chloride Channels - metabolism</topic><topic>Cyclopentanes - pharmacology</topic><topic>DCPIB</topic><topic>Gene Expression Regulation, Neoplastic</topic><topic>Humans</topic><topic>Indans - pharmacology</topic><topic>Ion Channel Gating</topic><topic>LRRC8A</topic><topic>Membrane Proteins - antagonists &amp; inhibitors</topic><topic>Membrane Proteins - genetics</topic><topic>Membrane Proteins - metabolism</topic><topic>Neoplasm Proteins - antagonists &amp; inhibitors</topic><topic>Neoplasm Proteins - genetics</topic><topic>Neoplasm Proteins - metabolism</topic><topic>Oral cancer</topic><topic>Protein Binding</topic><topic>Signal Transduction</topic><topic>Squamous Cell Carcinoma of Head and Neck - drug therapy</topic><topic>Squamous Cell Carcinoma of Head and Neck - genetics</topic><topic>Squamous Cell Carcinoma of Head and Neck - metabolism</topic><topic>Squamous Cell Carcinoma of Head and Neck - secondary</topic><topic>TMEM16A</topic><topic>Tongue Neoplasms - drug therapy</topic><topic>Tongue Neoplasms - genetics</topic><topic>Tongue Neoplasms - metabolism</topic><topic>Tongue Neoplasms - pathology</topic><topic>Volume-regulated chloride channel</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Yoshimoto, Shohei</creatorcontrib><creatorcontrib>Matsuda, Miho</creatorcontrib><creatorcontrib>Kato, Kenichi</creatorcontrib><creatorcontrib>Jimi, Eijiro</creatorcontrib><creatorcontrib>Takeuchi, Hiroshi</creatorcontrib><creatorcontrib>Nakano, Shuji</creatorcontrib><creatorcontrib>Kajioka, Shunichi</creatorcontrib><creatorcontrib>Matsuzaki, Etsuko</creatorcontrib><creatorcontrib>Hirofuji, Takao</creatorcontrib><creatorcontrib>Inoue, Ryuji</creatorcontrib><creatorcontrib>Hirata, Masato</creatorcontrib><creatorcontrib>Morita, Hiromitsu</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>European journal of pharmacology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Yoshimoto, Shohei</au><au>Matsuda, Miho</au><au>Kato, Kenichi</au><au>Jimi, Eijiro</au><au>Takeuchi, Hiroshi</au><au>Nakano, Shuji</au><au>Kajioka, Shunichi</au><au>Matsuzaki, Etsuko</au><au>Hirofuji, Takao</au><au>Inoue, Ryuji</au><au>Hirata, Masato</au><au>Morita, Hiromitsu</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Volume-regulated chloride channel regulates cell proliferation and is involved in the possible interaction between TMEM16A and LRRC8A in human metastatic oral squamous cell carcinoma cells</atitle><jtitle>European journal of pharmacology</jtitle><addtitle>Eur J Pharmacol</addtitle><date>2021-03-15</date><risdate>2021</risdate><volume>895</volume><spage>173881</spage><epage>173881</epage><pages>173881-173881</pages><artnum>173881</artnum><issn>0014-2999</issn><eissn>1879-0712</eissn><abstract>Volume-regulated anion channels (VRACs), expressed in various cells, play an important role in cell volume regulation. Despite being physiologically defined almost half a century ago, only the molecular candidates of VRAC, TMEM16A, LRRC8A, and bestrophin-1 (BEST1), are known. Here, we aimed to explore the functional significance of VRAC in, HST-1, an oral squamous cell carcinoma (OSCC) cell line. Cell proliferation assays, RT-PCR, Western blot, and flow cytometry were used to estimate changes in gene expression and cell proliferation. Ion channel activity was recorded using the patch-clamp technique. Specific genes were knocked-down by siRNA assays. VRAC, identified as a hypotonicity-induced current, was highly functional and associated with the proliferation of HST-1 cells but not of HaCaT (a normal keratinocyte) cells. The pharmacological profile of VRAC in HST-1 was similar to that reported previously. DCPIB, a specific VRAC inhibitor, completely inhibited VRAC and proliferation of HST-1 cells, eventually leading to apoptosis. VRAC in HST-1 was attenuated by the knockdown of TMEM16A and LRRC8A, while knockdown of BEST1 affected cell proliferation. In situ proximity ligation assay showed that TMEM16A and LRRC8A co-localized under isotonic conditions (300 mOsM) but were separated under hypotonic conditions (250 mOsM) on the plasma membrane. We have found that VRAC acts to regulate the proliferation of human metastatic OSCC cells and the composition of VRAC may involve in the interactions between TMEM16A and LRRC8A in HST-1 cells. •We aimed to identify the functional significance of volume-regulated anion channels (VRAC) in human OSCC cells.•VRAC in HST-1 likely involves the functional interaction of TMEM16A and LRRC8A, regulating the proliferative potential.•DCPIB, a specific VRAC inhibitor, suppressed both VRAC and the proliferation of HST-1 cells.</abstract><cop>Netherlands</cop><pub>Elsevier B.V</pub><pmid>33476655</pmid><doi>10.1016/j.ejphar.2021.173881</doi><tpages>1</tpages><orcidid>https://orcid.org/0000-0003-0033-2913</orcidid></addata></record>
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subjects Anoctamin-1 - antagonists & inhibitors
Anoctamin-1 - genetics
Anoctamin-1 - metabolism
Antineoplastic Agents - pharmacology
Apoptosis
Bestrophins - genetics
Bestrophins - metabolism
Cell Line, Tumor
Cell proliferation
Cell Proliferation - drug effects
Chloride Channels - antagonists & inhibitors
Chloride Channels - genetics
Chloride Channels - metabolism
Cyclopentanes - pharmacology
DCPIB
Gene Expression Regulation, Neoplastic
Humans
Indans - pharmacology
Ion Channel Gating
LRRC8A
Membrane Proteins - antagonists & inhibitors
Membrane Proteins - genetics
Membrane Proteins - metabolism
Neoplasm Proteins - antagonists & inhibitors
Neoplasm Proteins - genetics
Neoplasm Proteins - metabolism
Oral cancer
Protein Binding
Signal Transduction
Squamous Cell Carcinoma of Head and Neck - drug therapy
Squamous Cell Carcinoma of Head and Neck - genetics
Squamous Cell Carcinoma of Head and Neck - metabolism
Squamous Cell Carcinoma of Head and Neck - secondary
TMEM16A
Tongue Neoplasms - drug therapy
Tongue Neoplasms - genetics
Tongue Neoplasms - metabolism
Tongue Neoplasms - pathology
Volume-regulated chloride channel
title Volume-regulated chloride channel regulates cell proliferation and is involved in the possible interaction between TMEM16A and LRRC8A in human metastatic oral squamous cell carcinoma cells
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