Nonclassical action of Ku70 promotes Treg-suppressive function through a FOXP3-dependent mechanism in lung adenocarcinoma

Ku70, a DNA repair protein, binds to the damaged DNA ends and orchestrates the recruitment of other proteins to facilitate repair of DNA double-strand breaks. Besides its essential role in DNA repair, several studies have highlighted nonclassical functions of Ku70 in cellular processes. However, its...

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Veröffentlicht in:The Journal of clinical investigation 2024-12, Vol.134 (23), p.1-17
Hauptverfasser: Huang, Qianru, Tian, Na, Zhang, Jianfeng, Song, Shiyang, Cheng, Hao, Liu, Xinnan, Zhang, Wenle, Ye, Youqiong, Du, Yanhua, Dai, Xueyu, Liang, Rui, Li, Dan, Dai, Sheng-Ming, Wang, Chuan, Chen, Zhi, Zhou, Qianjun, Li, Bin
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container_issue 23
container_start_page 1
container_title The Journal of clinical investigation
container_volume 134
creator Huang, Qianru
Tian, Na
Zhang, Jianfeng
Song, Shiyang
Cheng, Hao
Liu, Xinnan
Zhang, Wenle
Ye, Youqiong
Du, Yanhua
Dai, Xueyu
Liang, Rui
Li, Dan
Dai, Sheng-Ming
Wang, Chuan
Chen, Zhi
Zhou, Qianjun
Li, Bin
description Ku70, a DNA repair protein, binds to the damaged DNA ends and orchestrates the recruitment of other proteins to facilitate repair of DNA double-strand breaks. Besides its essential role in DNA repair, several studies have highlighted nonclassical functions of Ku70 in cellular processes. However, its function in immune homeostasis and antitumor immunity remains unknown. Here, we discovered a marked association between elevated Ku70 expression and unfavorable prognosis in lung adenocarcinoma, focusing specifically on increased Ku70 levels in tumor-infiltrated Tregs. Using a lung-colonizing tumor model in mice with Treg-specific Ku70 deficiency, we demonstrated that deletion of Ku70 in Tregs led to a stronger antitumor response and slower tumor growth due to impaired immune-suppressive capacity of Tregs. Furthermore, we confirmed that Ku70 played a critical role in sustaining the suppressive function of human Tregs. We found that Ku70 bound to forkhead box protein P3 (FOXP3) and occupied FOXP3-bound genomic sites to support its transcriptional activities. These findings not only unveil a nonhomologous end joining-independent (NHEJ-independent) role of Ku70 crucial for Treg-suppressive function, but also underscore the potential of targeting Ku70 as an effective strategy in cancer therapy, aiming to both restrain cancer cells and enhance pulmonary antitumor immunity.
doi_str_mv 10.1172/JCI178079
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Besides its essential role in DNA repair, several studies have highlighted nonclassical functions of Ku70 in cellular processes. However, its function in immune homeostasis and antitumor immunity remains unknown. Here, we discovered a marked association between elevated Ku70 expression and unfavorable prognosis in lung adenocarcinoma, focusing specifically on increased Ku70 levels in tumor-infiltrated Tregs. Using a lung-colonizing tumor model in mice with Treg-specific Ku70 deficiency, we demonstrated that deletion of Ku70 in Tregs led to a stronger antitumor response and slower tumor growth due to impaired immune-suppressive capacity of Tregs. Furthermore, we confirmed that Ku70 played a critical role in sustaining the suppressive function of human Tregs. We found that Ku70 bound to forkhead box protein P3 (FOXP3) and occupied FOXP3-bound genomic sites to support its transcriptional activities. These findings not only unveil a nonhomologous end joining-independent (NHEJ-independent) role of Ku70 crucial for Treg-suppressive function, but also underscore the potential of targeting Ku70 as an effective strategy in cancer therapy, aiming to both restrain cancer cells and enhance pulmonary antitumor immunity.</description><identifier>ISSN: 1558-8238</identifier><identifier>ISSN: 0021-9738</identifier><identifier>EISSN: 1558-8238</identifier><identifier>DOI: 10.1172/JCI178079</identifier><identifier>PMID: 39446493</identifier><language>eng</language><publisher>United States: American Society for Clinical Investigation</publisher><subject>Adenocarcinoma ; Adenocarcinoma - genetics ; Adenocarcinoma - immunology ; Adenocarcinoma - metabolism ; Adenocarcinoma - pathology ; Adenocarcinoma of Lung - genetics ; Adenocarcinoma of Lung - immunology ; Adenocarcinoma of Lung - metabolism ; Adenocarcinoma of Lung - pathology ; Animals ; Antitumor activity ; Cancer therapies ; Cell Line, Tumor ; Chemotherapy ; Cytokines ; Cytotoxicity ; DNA damage ; DNA End-Joining Repair ; DNA repair ; DNA-Binding Proteins - genetics ; DNA-Binding Proteins - immunology ; DNA-Binding Proteins - metabolism ; Female ; Forkhead protein ; Forkhead Transcription Factors - genetics ; Forkhead Transcription Factors - immunology ; Forkhead Transcription Factors - metabolism ; Foxp3 protein ; Gene Expression Regulation, Neoplastic ; Genetic aspects ; Health aspects ; Homeostasis ; Humans ; Immunity ; Ku Autoantigen - genetics ; Ku Autoantigen - immunology ; Ku Autoantigen - metabolism ; Lung cancer ; Lung Neoplasms - genetics ; Lung Neoplasms - immunology ; Lung Neoplasms - metabolism ; Lung Neoplasms - pathology ; Lymphocytes ; Lymphocytes T ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Non-homologous end joining ; Physiological aspects ; Proteins ; Radiation therapy ; Spleen ; T cell receptors ; T cells ; T-Lymphocytes, Regulatory - immunology ; T-Lymphocytes, Regulatory - pathology ; Thymus gland ; Tumors</subject><ispartof>The Journal of clinical investigation, 2024-12, Vol.134 (23), p.1-17</ispartof><rights>COPYRIGHT 2024 American Society for Clinical Investigation</rights><rights>Copyright American Society for Clinical Investigation Dec 2024</rights><rights>2024 Huang et al. 2024 Huang et al.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c3788-42f51c8bf388af1742d9ce25de8ad0d8af2db49581a589ec550cef31e738519c3</cites><orcidid>0000-0001-8332-4710 ; 0000-0002-7640-8884</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC11601948/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC11601948/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,723,776,780,881,27903,27904,53770,53772</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/39446493$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Huang, Qianru</creatorcontrib><creatorcontrib>Tian, Na</creatorcontrib><creatorcontrib>Zhang, Jianfeng</creatorcontrib><creatorcontrib>Song, Shiyang</creatorcontrib><creatorcontrib>Cheng, Hao</creatorcontrib><creatorcontrib>Liu, Xinnan</creatorcontrib><creatorcontrib>Zhang, Wenle</creatorcontrib><creatorcontrib>Ye, Youqiong</creatorcontrib><creatorcontrib>Du, Yanhua</creatorcontrib><creatorcontrib>Dai, Xueyu</creatorcontrib><creatorcontrib>Liang, Rui</creatorcontrib><creatorcontrib>Li, Dan</creatorcontrib><creatorcontrib>Dai, Sheng-Ming</creatorcontrib><creatorcontrib>Wang, Chuan</creatorcontrib><creatorcontrib>Chen, Zhi</creatorcontrib><creatorcontrib>Zhou, Qianjun</creatorcontrib><creatorcontrib>Li, Bin</creatorcontrib><title>Nonclassical action of Ku70 promotes Treg-suppressive function through a FOXP3-dependent mechanism in lung adenocarcinoma</title><title>The Journal of clinical investigation</title><addtitle>J Clin Invest</addtitle><description>Ku70, a DNA repair protein, binds to the damaged DNA ends and orchestrates the recruitment of other proteins to facilitate repair of DNA double-strand breaks. 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These findings not only unveil a nonhomologous end joining-independent (NHEJ-independent) role of Ku70 crucial for Treg-suppressive function, but also underscore the potential of targeting Ku70 as an effective strategy in cancer therapy, aiming to both restrain cancer cells and enhance pulmonary antitumor immunity.</description><subject>Adenocarcinoma</subject><subject>Adenocarcinoma - genetics</subject><subject>Adenocarcinoma - immunology</subject><subject>Adenocarcinoma - metabolism</subject><subject>Adenocarcinoma - pathology</subject><subject>Adenocarcinoma of Lung - genetics</subject><subject>Adenocarcinoma of Lung - immunology</subject><subject>Adenocarcinoma of Lung - metabolism</subject><subject>Adenocarcinoma of Lung - pathology</subject><subject>Animals</subject><subject>Antitumor activity</subject><subject>Cancer therapies</subject><subject>Cell Line, Tumor</subject><subject>Chemotherapy</subject><subject>Cytokines</subject><subject>Cytotoxicity</subject><subject>DNA damage</subject><subject>DNA End-Joining Repair</subject><subject>DNA repair</subject><subject>DNA-Binding Proteins - genetics</subject><subject>DNA-Binding Proteins - immunology</subject><subject>DNA-Binding Proteins - metabolism</subject><subject>Female</subject><subject>Forkhead protein</subject><subject>Forkhead Transcription Factors - genetics</subject><subject>Forkhead Transcription Factors - immunology</subject><subject>Forkhead Transcription Factors - metabolism</subject><subject>Foxp3 protein</subject><subject>Gene Expression Regulation, Neoplastic</subject><subject>Genetic aspects</subject><subject>Health aspects</subject><subject>Homeostasis</subject><subject>Humans</subject><subject>Immunity</subject><subject>Ku Autoantigen - genetics</subject><subject>Ku Autoantigen - immunology</subject><subject>Ku Autoantigen - metabolism</subject><subject>Lung cancer</subject><subject>Lung Neoplasms - genetics</subject><subject>Lung Neoplasms - immunology</subject><subject>Lung Neoplasms - metabolism</subject><subject>Lung Neoplasms - pathology</subject><subject>Lymphocytes</subject><subject>Lymphocytes T</subject><subject>Mice</subject><subject>Mice, Inbred C57BL</subject><subject>Mice, Knockout</subject><subject>Non-homologous end joining</subject><subject>Physiological aspects</subject><subject>Proteins</subject><subject>Radiation therapy</subject><subject>Spleen</subject><subject>T cell receptors</subject><subject>T cells</subject><subject>T-Lymphocytes, Regulatory - immunology</subject><subject>T-Lymphocytes, Regulatory - pathology</subject><subject>Thymus gland</subject><subject>Tumors</subject><issn>1558-8238</issn><issn>0021-9738</issn><issn>1558-8238</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNqN0kFv0zAUB_AIgdgYHPgCyBISgkOGHduNfUJTxaAwUQQDcbNc5yX1lNjBjif27XG1UVrUA8oh0cvPfz_LryieEnxKSF29_jBfkFrgWt4rjgnnohQVFfd3vo-KRzFeYUwY4-xhcUQlYzMm6XFx88k70-sYrdE90may3iHfoo-pxmgMfvATRHQZoCtjGscAWV4DapO7pdM6-NStkUbnyx-fadnACK4BN6EBzFo7GwdkHeqT65DOdW90MNb5QT8uHrS6j_Dk7n1SfDt_ezl_X14s3y3mZxelobUQJataToxYtVQI3ZKaVY00UPEGhG5wk2tVs2KSC6K5kGA4xwZaSqCmghNp6Enx5jZ3TKsBGpN7C7pXY7CDDjfKa6v2_zi7Vp2_VoTMMJFM5ISXdwnB_0wQJzXYaKDvtQOfoqKkwlxSWdWZPv-HXvkUXD5fVoxlM6Pkr-p0D8q61ueNzSZUnYmcJSTBMqvygOrAQe7SO2htLu_50wM-Pw0M1hxc8GpvQTYT_Jo6nWJUi69f_t8uv-_bFzt2Dbqf1tH3aTMw8WCoCT7GAO32VghWm8lW28nO9tnuNW7ln1GmvwFy2_Bl</recordid><startdate>20241201</startdate><enddate>20241201</enddate><creator>Huang, Qianru</creator><creator>Tian, Na</creator><creator>Zhang, Jianfeng</creator><creator>Song, Shiyang</creator><creator>Cheng, Hao</creator><creator>Liu, Xinnan</creator><creator>Zhang, Wenle</creator><creator>Ye, Youqiong</creator><creator>Du, Yanhua</creator><creator>Dai, Xueyu</creator><creator>Liang, Rui</creator><creator>Li, Dan</creator><creator>Dai, Sheng-Ming</creator><creator>Wang, Chuan</creator><creator>Chen, Zhi</creator><creator>Zhou, Qianjun</creator><creator>Li, Bin</creator><general>American Society for Clinical Investigation</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>IOV</scope><scope>ISR</scope><scope>3V.</scope><scope>7RV</scope><scope>7X7</scope><scope>7XB</scope><scope>88A</scope><scope>88E</scope><scope>8AO</scope><scope>8FE</scope><scope>8FH</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BEC</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>K9.</scope><scope>KB0</scope><scope>LK8</scope><scope>M0S</scope><scope>M1P</scope><scope>M7P</scope><scope>NAPCQ</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>S0X</scope><scope>7X8</scope><scope>5PM</scope><orcidid>https://orcid.org/0000-0001-8332-4710</orcidid><orcidid>https://orcid.org/0000-0002-7640-8884</orcidid></search><sort><creationdate>20241201</creationdate><title>Nonclassical action of Ku70 promotes Treg-suppressive function through a FOXP3-dependent mechanism in lung adenocarcinoma</title><author>Huang, Qianru ; Tian, Na ; Zhang, Jianfeng ; Song, Shiyang ; Cheng, Hao ; Liu, Xinnan ; Zhang, Wenle ; Ye, Youqiong ; Du, Yanhua ; Dai, Xueyu ; Liang, Rui ; Li, Dan ; Dai, Sheng-Ming ; Wang, Chuan ; Chen, Zhi ; Zhou, Qianjun ; Li, Bin</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3788-42f51c8bf388af1742d9ce25de8ad0d8af2db49581a589ec550cef31e738519c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2024</creationdate><topic>Adenocarcinoma</topic><topic>Adenocarcinoma - genetics</topic><topic>Adenocarcinoma - immunology</topic><topic>Adenocarcinoma - metabolism</topic><topic>Adenocarcinoma - pathology</topic><topic>Adenocarcinoma of Lung - genetics</topic><topic>Adenocarcinoma of Lung - immunology</topic><topic>Adenocarcinoma of Lung - metabolism</topic><topic>Adenocarcinoma of Lung - pathology</topic><topic>Animals</topic><topic>Antitumor activity</topic><topic>Cancer therapies</topic><topic>Cell Line, Tumor</topic><topic>Chemotherapy</topic><topic>Cytokines</topic><topic>Cytotoxicity</topic><topic>DNA damage</topic><topic>DNA End-Joining Repair</topic><topic>DNA repair</topic><topic>DNA-Binding Proteins - genetics</topic><topic>DNA-Binding Proteins - immunology</topic><topic>DNA-Binding Proteins - metabolism</topic><topic>Female</topic><topic>Forkhead protein</topic><topic>Forkhead Transcription Factors - genetics</topic><topic>Forkhead Transcription Factors - immunology</topic><topic>Forkhead Transcription Factors - metabolism</topic><topic>Foxp3 protein</topic><topic>Gene Expression Regulation, Neoplastic</topic><topic>Genetic aspects</topic><topic>Health aspects</topic><topic>Homeostasis</topic><topic>Humans</topic><topic>Immunity</topic><topic>Ku Autoantigen - 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These findings not only unveil a nonhomologous end joining-independent (NHEJ-independent) role of Ku70 crucial for Treg-suppressive function, but also underscore the potential of targeting Ku70 as an effective strategy in cancer therapy, aiming to both restrain cancer cells and enhance pulmonary antitumor immunity.</abstract><cop>United States</cop><pub>American Society for Clinical Investigation</pub><pmid>39446493</pmid><doi>10.1172/JCI178079</doi><tpages>17</tpages><orcidid>https://orcid.org/0000-0001-8332-4710</orcidid><orcidid>https://orcid.org/0000-0002-7640-8884</orcidid><oa>free_for_read</oa></addata></record>
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subjects Adenocarcinoma
Adenocarcinoma - genetics
Adenocarcinoma - immunology
Adenocarcinoma - metabolism
Adenocarcinoma - pathology
Adenocarcinoma of Lung - genetics
Adenocarcinoma of Lung - immunology
Adenocarcinoma of Lung - metabolism
Adenocarcinoma of Lung - pathology
Animals
Antitumor activity
Cancer therapies
Cell Line, Tumor
Chemotherapy
Cytokines
Cytotoxicity
DNA damage
DNA End-Joining Repair
DNA repair
DNA-Binding Proteins - genetics
DNA-Binding Proteins - immunology
DNA-Binding Proteins - metabolism
Female
Forkhead protein
Forkhead Transcription Factors - genetics
Forkhead Transcription Factors - immunology
Forkhead Transcription Factors - metabolism
Foxp3 protein
Gene Expression Regulation, Neoplastic
Genetic aspects
Health aspects
Homeostasis
Humans
Immunity
Ku Autoantigen - genetics
Ku Autoantigen - immunology
Ku Autoantigen - metabolism
Lung cancer
Lung Neoplasms - genetics
Lung Neoplasms - immunology
Lung Neoplasms - metabolism
Lung Neoplasms - pathology
Lymphocytes
Lymphocytes T
Mice
Mice, Inbred C57BL
Mice, Knockout
Non-homologous end joining
Physiological aspects
Proteins
Radiation therapy
Spleen
T cell receptors
T cells
T-Lymphocytes, Regulatory - immunology
T-Lymphocytes, Regulatory - pathology
Thymus gland
Tumors
title Nonclassical action of Ku70 promotes Treg-suppressive function through a FOXP3-dependent mechanism in lung adenocarcinoma
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