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Since we previously showed that DNA-damaging agents (including chemotherapy and irradiation) can induce EBV lytic reactivation and recently demonstrated that wild-type p53 contributes to lytic reactivation, we investigated the role of the ATM kinase during EBV reactivation. ATM phosphorylates and activates p53, as well as numerous other substrates involved in the cellular DNA damage response. Using an ATM inhibitor (KU55933), we found that ATM activity is required for efficient induction of EBV lytic gene expression by a variety of different stimuli, including a histone deacetylase (HDAC) inhibitor, the transforming growth factor \u03b2 (TGF-\u03b2) cytokine, a demethylating agent (5-azacytidine), B cell receptor engagement with anti-IgG antibody, hydrogen peroxide, and the proteosome inhibitor bortezomib. In EBV-infected AGS (gastric) cells, knockdown of ATM, or p53, expression inhibits EBV reactivation. Conversely, treatment of these cells with nutlin-3 (which activates p53 and ATM) robustly induces lytic reactivation in a p53- and ATM-dependent manner. The ability of the EBV R and Na proteins to induce lytic reactivation in EBV-infected AGS cells is ATM dependent. However, overexpression of Z induces lytic gene expression in the presence or absence of ATM activity. Our results suggest that ATM enhances Z promoter activity in the context of the intact EBV genome and that p53 contributes to the ATM effect. Nevertheless, since we found that ATM inhibitors also reduce lytic reactivation in Burkitt lymphoma cells that have no p53, additional ATM substrates must also contribute to the ATM effect.<\/jats:p>","DOI":"10.1128\/jvi.01850-12","type":"journal-article","created":{"date-parts":[[2012,9,27]],"date-time":"2012-09-27T16:07:40Z","timestamp":1348762060000},"page":"13360-13370","update-policy":"https:\/\/doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":79,"title":["The Cellular Ataxia Telangiectasia-Mutated Kinase Promotes Epstein-Barr Virus Lytic Reactivation in Response to Multiple Different Types of Lytic Reactivation-Inducing Stimuli"],"prefix":"10.1128","volume":"86","author":[{"given":"Stacy R.","family":"Hagemeier","sequence":"first","affiliation":[{"name":"McArdle Laboratory for Cancer Research, Department of Oncology"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Elizabeth A.","family":"Barlow","sequence":"additional","affiliation":[{"name":"McArdle Laboratory for Cancer Research, Department of Oncology"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qiao","family":"Meng","sequence":"additional","affiliation":[{"name":"McArdle Laboratory for Cancer Research, Department of Oncology"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shannon C.","family":"Kenney","sequence":"additional","affiliation":[{"name":"McArdle Laboratory for Cancer Research, Department of Oncology"},{"name":"Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"235","reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.1128\/JVI.75.5.2388-2399.2001"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1006\/viro.1998.9396"},{"key":"e_1_3_2_4_2","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.221439999"},{"key":"e_1_3_2_5_2","doi-asserted-by":"publisher","DOI":"10.1002\/ijc.2910280204"},{"key":"e_1_3_2_6_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00018-011-0683-9"},{"key":"e_1_3_2_7_2","doi-asserted-by":"publisher","DOI":"10.1128\/JVI.79.12.7338-7348.2005"},{"key":"e_1_3_2_8_2","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.0907994106"},{"key":"e_1_3_2_9_2","doi-asserted-by":"publisher","DOI":"10.1038\/nm0602-594"},{"key":"e_1_3_2_10_2","doi-asserted-by":"publisher","DOI":"10.1002\/path.2487"},{"key":"e_1_3_2_11_2","doi-asserted-by":"publisher","DOI":"10.1371\/journal.ppat.1002418"},{"key":"e_1_3_2_12_2","doi-asserted-by":"publisher","DOI":"10.1139\/O10-113"},{"key":"e_1_3_2_13_2","doi-asserted-by":"publisher","DOI":"10.1158\/0008-5472.CAN-08-4570"},{"key":"e_1_3_2_14_2","doi-asserted-by":"publisher","DOI":"10.1128\/JVI.02717-07"},{"key":"e_1_3_2_15_2","doi-asserted-by":"publisher","DOI":"10.1074\/jbc.M304423200"},{"key":"e_1_3_2_16_2","doi-asserted-by":"publisher","DOI":"10.1128\/JVI.74.7.3093-3104.2000"},{"key":"e_1_3_2_17_2","doi-asserted-by":"publisher","DOI":"10.1002\/j.1460-2075.1986.tb04635.x"},{"key":"e_1_3_2_18_2","doi-asserted-by":"publisher","DOI":"10.1002\/jmv.23316"},{"key":"e_1_3_2_19_2","doi-asserted-by":"publisher","DOI":"10.1128\/jvi.61.12.3672-3679.1987"},{"key":"e_1_3_2_20_2","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.82.12.4085"},{"key":"e_1_3_2_21_2","doi-asserted-by":"publisher","DOI":"10.1128\/JVI.75.13.6135-6142.2001"},{"key":"e_1_3_2_22_2","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.95.14.8245"},{"key":"e_1_3_2_23_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.febslet.2010.05.031"},{"key":"e_1_3_2_24_2","doi-asserted-by":"publisher","DOI":"10.1371\/journal.ppat.1000356"},{"key":"e_1_3_2_25_2","doi-asserted-by":"publisher","DOI":"10.1128\/JVI.02706-09"},{"key":"e_1_3_2_26_2","doi-asserted-by":"publisher","DOI":"10.1128\/JVI.74.13.5810-5818.2000"},{"key":"e_1_3_2_27_2","doi-asserted-by":"publisher","DOI":"10.1002\/j.1460-2075.1991.tb07837.x"},{"key":"e_1_3_2_28_2","doi-asserted-by":"publisher","DOI":"10.1093\/emboj\/19.12.3080"},{"key":"e_1_3_2_29_2","first-page":"1920","article-title":"Chemotherapy induces lytic EBV replication and confers ganciclovir susceptibility to EBV-positive epithelial cell tumors","volume":"62","author":"Feng WH","year":"2002","unstructured":"FengWH IsraelB Raab-TraubN BussonP KenneySC. 2002. 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