PMID- 30316805 OWN - NLM STAT- MEDLINE DCOM- 20190326 LR - 20200309 IS - 1873-2399 (Electronic) IS - 0301-472X (Print) IS - 0301-472X (Linking) VI - 69 DP - 2019 Jan TI - Interleukin-18 plays a dispensable role in murine and likely also human bone marrow failure. PG - 54-64.e2 LID - S0301-472X(18)30861-0 [pii] LID - 10.1016/j.exphem.2018.10.003 [doi] AB - Interleukin-18 (IL-18), also known as interferon-gamma (IFN-gamma)-inducing factor, is involved in Th1 responses and regulation of immunity. Accumulating evidence implicates IL-18 in autoimmune diseases, but little is known of its role in acquired aplastic anemia (AA), the immune-mediated destruction of bone marrow (BM) hematopoietic stem and progenitor cells (HSPCs). IL-18 protein levels were significantly elevated in sera of severe AA (SAA) patients, including both responders and nonresponders assayed before treatment, and decreased after treatment. IL-18 receptor (IL-18R) was expressed on HSPCs. Co-culture of human BM CD34(+) cells from healthy donors with IL-18 upregulated genes in the helper T-cell and Notch signaling pathways and downregulated genes in the cell cycle regulation, telomerase, and IL-6 signaling pathways. Plasma IL-18 levels were also elevated in murine models of immune-mediated BM failure. However, deletion of IL-18 in donor lymph node cells or deletions of either IL-18 or IL-18R in recipients did not attenuate elevations of circulating IFN-gamma, tumor necrosis factor-alpha, or IL-6, nor did they alleviate BM failure. In summary, our findings suggest that, although increased circulating IL-18 is a feature of SAA, it may reflect an aberrant immune response but be dispensable to the pathogenesis of AA. CI - Published by Elsevier Inc. FAU - Wu, Zhijie AU - Wu Z AD - Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA. FAU - Giudice, Valentina AU - Giudice V AD - Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA. FAU - Chen, Jichun AU - Chen J AD - Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA. FAU - Sun, Wanling AU - Sun W AD - Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA. FAU - Lin, Zenghua AU - Lin Z AD - Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA. FAU - Keyvanfar, Keyvan AU - Keyvanfar K AD - Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA. FAU - Talasani, Nidhi AU - Talasani N AD - Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA. FAU - Kajigaya, Sachiko AU - Kajigaya S AD - Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA. FAU - Feng, Xingmin AU - Feng X AD - Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA. Electronic address: fengx2@nhlbi.nih.gov. FAU - Young, Neal S AU - Young NS AD - Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA. LA - eng GR - Z01 HL002315-21/Intramural NIH HHS/United States GR - Z01 HL002315-22/Intramural NIH HHS/United States GR - Z01 HL002315-23/Intramural NIH HHS/United States PT - Clinical Trial PT - Journal Article PT - Research Support, N.I.H., Intramural DEP - 20181012 PL - Netherlands TA - Exp Hematol JT - Experimental hematology JID - 0402313 RN - 0 (IFNG protein, human) RN - 0 (IFNG protein, mouse) RN - 0 (IL18R1 protein, human) RN - 0 (IL6 protein, human) RN - 0 (Il18r1 protein, mouse) RN - 0 (Interleukin-18) RN - 0 (Interleukin-18 Receptor alpha Subunit) RN - 0 (Interleukin-6) RN - 0 (Tumor Necrosis Factor-alpha) RN - 0 (interleukin-6, mouse) RN - 82115-62-6 (Interferon-gamma) SB - IM MH - Adolescent MH - Adult MH - Aged MH - Aged, 80 and over MH - Anemia, Aplastic/genetics/*immunology/pathology MH - Animals MH - Child MH - Child, Preschool MH - Disease Models, Animal MH - Female MH - Hematopoietic Stem Cells/*metabolism/pathology MH - Humans MH - Interferon-gamma/genetics/immunology MH - Interleukin-18/genetics/*immunology MH - Interleukin-18 Receptor alpha Subunit/genetics/immunology MH - Interleukin-6/genetics/immunology MH - Male MH - Mice MH - Middle Aged MH - T-Lymphocytes, Helper-Inducer/immunology/pathology MH - Tumor Necrosis Factor-alpha/genetics/immunology PMC - PMC6309608 MID - NIHMS1509494 COIS- Conflicts of Interest Disclosures The authors declare no competing financial interests. EDAT- 2018/10/15 06:00 MHDA- 2019/03/27 06:00 PMCR- 2020/01/01 CRDT- 2018/10/15 06:00 PHST- 2018/07/13 00:00 [received] PHST- 2018/10/06 00:00 [revised] PHST- 2018/10/08 00:00 [accepted] PHST- 2018/10/15 06:00 [pubmed] PHST- 2019/03/27 06:00 [medline] PHST- 2018/10/15 06:00 [entrez] PHST- 2020/01/01 00:00 [pmc-release] AID - S0301-472X(18)30861-0 [pii] AID - 10.1016/j.exphem.2018.10.003 [doi] PST - ppublish SO - Exp Hematol. 2019 Jan;69:54-64.e2. doi: 10.1016/j.exphem.2018.10.003. Epub 2018 Oct 12.