PMID- 21984125 OWN - NLM STAT- MEDLINE DCOM- 20111128 LR - 20230612 IS - 1096-9896 (Electronic) IS - 0022-3417 (Print) IS - 0022-3417 (Linking) VI - 225 IP - 3 DP - 2011 Nov TI - Kaposi's sarcoma-associated herpesviral IL-6 and human IL-6 open reading frames contain miRNA binding sites and are subject to cellular miRNA regulation. PG - 378-89 LID - 10.1002/path.2962 [doi] AB - Kaposi's sarcoma-associated herpesvirus (KSHV) encodes a viral interleukin 6 (vIL-6) that mimics many activities of human IL-6 (hIL-6). Both vIL-6 and hIL-6 play important roles in stimulating the proliferation of tumours caused by KSHV. Here, we provide evidence that a miRNA pathway is involved in regulation of vIL-6 and hIL-6 expression through binding sites in their open reading frames (ORFs). We show a direct repression of vIL-6 by hsa-miR-1293 and hIL-6 by hsa-miR-608. The repression of vIL-6 by miR-1293 was reversed by disruption of the vIL-6 miR-1293 seed match through the introduction of point mutations. In addition, expression of vIL-6 or hIL-6 in KSHV-infected cells could be enhanced by transfection of the respective miRNA inhibitors. In situ hybridization of human lymph node sections revealed that miR-1293 is primarily expressed in the germinal centre but is deficient in the mantle zone of lymph nodes, where the expression of vIL-6 is often found in patients with KSHV-associated multicentric Castleman's disease, providing evidence of an anatomical correlation. Taking these factors together, our study indicates that IL-6 expression can be regulated by miRNA interactions in its ORF and provides evidence for the role of these interactions in the pathogenesis of KSHV-associated diseases. CI - Copyright (c) 2011 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd. FAU - Kang, Jeong-Gu AU - Kang JG AD - HIV and AIDS Malignancy Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892, USA. FAU - Majerciak, Vladimir AU - Majerciak V FAU - Uldrick, Thomas S AU - Uldrick TS FAU - Wang, Xiaohong AU - Wang X FAU - Kruhlak, Michael AU - Kruhlak M FAU - Yarchoan, Robert AU - Yarchoan R FAU - Zheng, Zhi-Ming AU - Zheng ZM LA - eng GR - ZIA SC010357/ImNIH/Intramural NIH HHS/United States GR - ZIA SC010357-11/ImNIH/Intramural NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, N.I.H., Intramural PT - Research Support, Non-U.S. Gov't DEP - 20110824 PL - England TA - J Pathol JT - The Journal of pathology JID - 0204634 RN - 0 (Interleukin-6) RN - 0 (MicroRNAs) RN - 0 (RNA, Viral) RN - 0 (Viral Proteins) SB - IM MH - Base Sequence MH - Binding Sites/genetics MH - Conserved Sequence MH - Gene Expression Regulation/*genetics MH - Gene Expression Regulation, Viral/genetics MH - Germinal Center/metabolism MH - HEK293 Cells MH - HeLa Cells MH - Herpesviridae Infections/genetics/metabolism MH - Herpesvirus 8, Human/genetics/*metabolism MH - Humans MH - Interleukin-6/*biosynthesis/genetics MH - Lymph Nodes/metabolism MH - MicroRNAs/genetics MH - Molecular Sequence Data MH - Open Reading Frames/genetics MH - RNA, Viral/genetics MH - Viral Proteins/biosynthesis/genetics PMC - PMC3528401 MID - NIHMS423648 COIS- Conflict-of-interest disclosure: Dr. Giovanna Tosato, the spouse of one of the authors, R.Y. is a co-inventor on a patent describing the measurement of KSHV vIL6. This invention was made when G.T. was an employee of the US Government under 45 Code of Federal Regulations Part 7. All rights, title, and interest to this patent have been assigned to the U.S. Department of Health and Human Services. The government conveys a portion of the royalties it receives to its employee inventors under the Federal Technology Transfer Act of 1986 (P.L. 99-502). EDAT- 2011/10/11 06:00 MHDA- 2011/12/13 00:00 PMCR- 2012/12/21 CRDT- 2011/10/11 06:00 PHST- 2010/11/17 00:00 [received] PHST- 2011/05/29 00:00 [revised] PHST- 2011/06/30 00:00 [accepted] PHST- 2011/10/11 06:00 [entrez] PHST- 2011/10/11 06:00 [pubmed] PHST- 2011/12/13 00:00 [medline] PHST- 2012/12/21 00:00 [pmc-release] AID - 10.1002/path.2962 [doi] PST - ppublish SO - J Pathol. 2011 Nov;225(3):378-89. doi: 10.1002/path.2962. Epub 2011 Aug 24.