PMID- 37263073 OWN - NLM STAT- MEDLINE DCOM- 20230801 LR - 20230801 IS - 1873-5835 (Electronic) IS - 0145-2126 (Linking) VI - 131 DP - 2023 Aug TI - Elevated expression of interleukin 16 in chronic lymphocytic leukemia is associated with disease burden and abnormal immune microenvironment. PG - 107315 LID - S0145-2126(23)00580-5 [pii] LID - 10.1016/j.leukres.2023.107315 [doi] AB - Interleukin-16 (IL-16) is a novel biomarker that has been implicated in many cancers as well as inflammatory diseases. In this study, we examined plasma levels of 30 cytokines and chemokines in chronic lymphocytic leukemia (CLL) and monoclonal B cell lymphocytosis (MBL) patients, and examined their association with disease stage, CLL biomarkers and T cell subsets. Interleukin 16 (IL-16) was identified as a relatively uncharacterized cytokine significantly elevated in CLL patients compared to healthy controls and MBL patients. Plasma levels of IL-16 were significantly elevated by Rai stage 0, increased by Rai stage 3-4, correlated strongly with lymphocyte count and were decreased after Ibrutinib treatment. CLL cells expressed IL-16 mRNA and spontaneously secreted IL-16 in vitro. CLL cells express IL-16 mRNA at significantly higher levels in lymphoid tissues than blood, and we observed that IL-16 release was increased in co-cultures of CLL and autologous CD4 + T cells. Elevated plasma IL-16 levels were associated with abnormalities in the immune microenvironment including multiple inflammatory cytokines and chemokines and expansion of type 1 follicular helper T cells. Taken together, our results identify IL-16 as a novel biomarker in CLL with potential functional roles in cellular interactions between CLL cells and T cells. CI - Copyright (c) 2023 Elsevier Ltd. All rights reserved. FAU - Wu, Xun AU - Wu X AD - Department of Immunology, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada. FAU - Thisdelle, Jordan AU - Thisdelle J AD - Department of Immunology, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada. FAU - Hou, Sen AU - Hou S AD - Department of Immunology, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada. FAU - Fajardo-Despaigne, J Ernesto AU - Fajardo-Despaigne JE AD - Department of Immunology, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada. FAU - Gibson, Spencer B AU - Gibson SB AD - Department of Immunology, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada; Department of Biochemistry and Medical Genetics, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada; CancerCare Manitoba Research Institute, Winnipeg, MB, Canada. FAU - Johnston, James B AU - Johnston JB AD - Department of Internal Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada; CancerCare Manitoba Research Institute, Winnipeg, MB, Canada. FAU - Dawe, David E AU - Dawe DE AD - Department of Internal Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada; CancerCare Manitoba Research Institute, Winnipeg, MB, Canada. FAU - Banerji, Versha AU - Banerji V AD - Department of Internal Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada; CancerCare Manitoba Research Institute, Winnipeg, MB, Canada. FAU - Marshall, Aaron J AU - Marshall AJ AD - Department of Immunology, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada; Department of Internal Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada; Department of Biochemistry and Medical Genetics, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada; CancerCare Manitoba Research Institute, Winnipeg, MB, Canada. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20230518 PL - England TA - Leuk Res JT - Leukemia research JID - 7706787 RN - 0 (Interleukin-16) SB - IM MH - Humans MH - *Leukemia, Lymphocytic, Chronic, B-Cell/therapy MH - Interleukin-16 MH - Lymphocyte Count MH - *Lymphocytosis MH - Cost of Illness MH - Tumor Microenvironment OTO - NOTNLM OT - Chemokine OT - Chronic lymphocytic leukemia OT - Cytokine OT - Follicular helper T cells OT - Interleukin-16 OT - Monoclonal B cell lymphocytosis COIS- Declaration of Competing Interest The authors have no conflicts of interest to disclose. EDAT- 2023/06/02 01:07 MHDA- 2023/08/01 06:45 CRDT- 2023/06/01 18:06 PHST- 2023/01/18 00:00 [received] PHST- 2023/05/10 00:00 [revised] PHST- 2023/05/16 00:00 [accepted] PHST- 2023/08/01 06:45 [medline] PHST- 2023/06/02 01:07 [pubmed] PHST- 2023/06/01 18:06 [entrez] AID - S0145-2126(23)00580-5 [pii] AID - 10.1016/j.leukres.2023.107315 [doi] PST - ppublish SO - Leuk Res. 2023 Aug;131:107315. doi: 10.1016/j.leukres.2023.107315. Epub 2023 May 18.