PMID- 22745469 OWN - NLM STAT- MEDLINE DCOM- 20120917 LR - 20181201 IS - 1460-2105 (Electronic) IS - 0027-8874 (Linking) VI - 104 IP - 13 DP - 2012 Jul 3 TI - Role of interleukin 16 in multiple myeloma. PG - 1005-20 LID - 10.1093/jnci/djs257 [doi] AB - BACKGROUND: Multiple myeloma is a malignancy characterized by the expansion of a plasma cell clone that localizes to the human bone marrow. Myeloma cells and bone marrow stromal cells produce soluble factors that promote the survival and progression of multiple myeloma. Interleukin 16 (IL-16) is involved in regulating the migration and proliferation of normal leukocytes. However, the role of IL-16 in human cancers, including multiple myeloma, is unclear. METHODS: We investigated IL-16 expression in cell lines (n = 10) and in the bone marrow of myeloma patients (n = 62) and healthy bone marrow donors (n = 12) by quantitative reverse transcription-polymerase chain reaction, immunoblot analysis, enzyme-linked immunosorbent assay, flow cytometry, and immunohistochemistry. Transfection of two human multiple myeloma cell lines with small interfering RNAs was used to examine the effect of IL-16 gene silencing on apoptosis by flow cytometry, on proliferation by bromodeoxyuridine incorporation, and on colony formation. Protein neutralization assays were performed by treating multiple myeloma cells with a monoclonal antibody against the carboxyl-terminal fragment of IL-16. All statistical tests were two-sided. RESULTS: IL-16 was strongly overexpressed in the bone marrow of myeloma patients compared with healthy donors. Myeloma cell lines as well as primary tumor cells from myeloma patients constitutively expressed IL-16 and its receptors CD4 and/or CD9 and spontaneously secreted soluble IL-16. Silencing of IL-16 reduced the proliferative activity of myeloma cells by approximately 80% compared with untreated cells (mean relative proliferative activity IL-16 siRNA vs untransfected cells, EJM cells: 20.1%, 95% confidence interval [CI] = 14.3% to 26.0%, P = .03; KMS-12-BM cells: 22.8%, 95% CI = 5.5% to 40.0%, P = .04), and addition of a recombinant carboxyl-terminal IL-16 peptide reversed that effect. A monoclonal antibody directed against IL-16 or its receptors had a comparably strong growth-inhibiting effect on the tumor cells. CONCLUSIONS: IL-16 is an important growth-promoting factor in multiple myeloma and a candidate for novel diagnostic, prognostic, and therapeutic applications for this incurable human malignancy. FAU - Atanackovic, Djordje AU - Atanackovic D AD - Department of Medicine II, Oncology/Hematology/Stem Cell Transplantation, University Cancer Center Hamburg (Hubertus Wald Tumorzentrum), University Medical Center Hamburg-Eppendorf, Martinistrasse 52, Hamburg, Germany. d.atanackovic@uke.uni-hamburg.de FAU - Hildebrandt, York AU - Hildebrandt Y FAU - Templin, Julia AU - Templin J FAU - Cao, Yanran AU - Cao Y FAU - Keller, Christiane AU - Keller C FAU - Panse, Jens AU - Panse J FAU - Meyer, Sabrina AU - Meyer S FAU - Reinhard, Henrike AU - Reinhard H FAU - Bartels, Katrin AU - Bartels K FAU - Lajmi, Nesrine AU - Lajmi N FAU - Sezer, Orhan AU - Sezer O FAU - Zander, Axel R AU - Zander AR FAU - Marx, Andreas H AU - Marx AH FAU - Uhlig, Ria AU - Uhlig R FAU - Zustin, Jozef AU - Zustin J FAU - Bokemeyer, Carsten AU - Bokemeyer C FAU - Kroger, Nicolaus AU - Kroger N LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20120628 PL - United States TA - J Natl Cancer Inst JT - Journal of the National Cancer Institute JID - 7503089 RN - 0 (CD4 Antigens) RN - 0 (CD9 protein, human) RN - 0 (Interleukin-6) RN - 0 (RNA, Small Interfering) RN - 0 (Tetraspanin 29) SB - IM CIN - J Natl Cancer Inst. 2012 Jul 3;104(13):964-5. PMID: 22745468 MH - Adult MH - Aged MH - Apoptosis MH - Bone Marrow Cells/*metabolism MH - CD4 Antigens/metabolism MH - Cell Line, Tumor MH - Cell Proliferation MH - Enzyme-Linked Immunosorbent Assay MH - Female MH - Flow Cytometry MH - Gene Expression Regulation, Neoplastic MH - Gene Silencing MH - Humans MH - Immunohistochemistry MH - Interleukin-6/*genetics/*metabolism MH - Male MH - Middle Aged MH - Multiple Myeloma/*metabolism MH - Neoplastic Stem Cells/metabolism MH - Plasma Cells/*metabolism MH - RNA, Small Interfering/metabolism MH - Reverse Transcriptase Polymerase Chain Reaction MH - Tetraspanin 29/metabolism MH - Up-Regulation EDAT- 2012/06/30 06:00 MHDA- 2012/09/18 06:00 CRDT- 2012/06/30 06:00 PHST- 2012/06/30 06:00 [entrez] PHST- 2012/06/30 06:00 [pubmed] PHST- 2012/09/18 06:00 [medline] AID - djs257 [pii] AID - 10.1093/jnci/djs257 [doi] PST - ppublish SO - J Natl Cancer Inst. 2012 Jul 3;104(13):1005-20. doi: 10.1093/jnci/djs257. Epub 2012 Jun 28.