PMID- 29249192 OWN - NLM STAT- MEDLINE DCOM- 20190318 LR - 20190318 IS - 1029-2403 (Electronic) IS - 1026-8022 (Linking) VI - 59 IP - 9 DP - 2018 Sep TI - DNA damage response-initiated cytokine secretion in bone marrow stromal cells promotes chemoresistance of myeloma cells. PG - 2220-2226 LID - 10.1080/10428194.2017.1413188 [doi] AB - Acquisition of chemoresistance accounts for a major cause of chemotherapy failure for multiple myeloma (MM). Bone marrow stromal cells (BMSCs) are considered to play a pivotal role in modulating drug resistance of MM cells. However, the underlying mechanism whereby BMSCs, particularly damaged stromal cells, affects chemoresistance has not been identified yet. Here, we show exposure to doxorubicin doxorubicin (Dox) induced dramatic ATM (ataxia-telangiectasia-mutated)-dependent DNA damage response (DDR) and increased secretion of interleukin (IL)-6 in HS-5 cell line and primary BMSCs derived from healthy donors. Specifically, IL-6-containing conditioned media (CM) derived from Dox-pretreated stromal cells displayed significant protective effect on Dox-induced apoptosis of MM cells. Also, treatment of BMSCs with ATM kinase inhibitor markedly reduced IL-6 secretion and concurrently, partially reversed CM-mediated chemoresistance in myeloma cells. These data indicate that DNA-damaging drug triggers an ATM-dependent DDR in BMSCs, leading to increased cytokine secretion and resistance of myeloma cells to chemotherapy-induced apoptosis. FAU - Tang, Hailong AU - Tang H AD - a Department of Hematology , Xijing Hospital, Fourth Military Medical University , Xi'an , Shaanxi , China. FAU - Shu, Mimi AU - Shu M AD - a Department of Hematology , Xijing Hospital, Fourth Military Medical University , Xi'an , Shaanxi , China. FAU - Dai, Bo AU - Dai B AD - b Shaanxi Center for Stem Cell Application Engineering Research , Xi'an , Shaanxi , China. FAU - Xu, Li AU - Xu L AD - a Department of Hematology , Xijing Hospital, Fourth Military Medical University , Xi'an , Shaanxi , China. FAU - Dong, Baoxia AU - Dong B AD - a Department of Hematology , Xijing Hospital, Fourth Military Medical University , Xi'an , Shaanxi , China. FAU - Gao, Guangxun AU - Gao G AD - a Department of Hematology , Xijing Hospital, Fourth Military Medical University , Xi'an , Shaanxi , China. FAU - Chen, Xiequn AU - Chen X AD - a Department of Hematology , Xijing Hospital, Fourth Military Medical University , Xi'an , Shaanxi , China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20171218 PL - United States TA - Leuk Lymphoma JT - Leukemia & lymphoma JID - 9007422 RN - 0 (2-morpholin-4-yl-6-thianthren-1-yl-pyran-4-one) RN - 0 (Antibiotics, Antineoplastic) RN - 0 (Interleukin-6) RN - 0 (Morpholines) RN - 0 (Pyrones) RN - 80168379AG (Doxorubicin) RN - EC 2.7.11.1 (Ataxia Telangiectasia Mutated Proteins) SB - IM MH - Antibiotics, Antineoplastic/pharmacology MH - Apoptosis/drug effects MH - Ataxia Telangiectasia Mutated Proteins/antagonists & inhibitors/metabolism MH - Cell Line MH - Cell Line, Tumor MH - Cells, Cultured MH - *DNA Damage MH - Doxorubicin/*pharmacology MH - Drug Resistance, Neoplasm/*drug effects MH - Humans MH - Interleukin-6/*metabolism MH - Mesenchymal Stem Cells/*drug effects/metabolism MH - Morpholines/pharmacology MH - Multiple Myeloma/genetics/metabolism/pathology MH - Pyrones/pharmacology OTO - NOTNLM OT - DNA damage response OT - Myeloma OT - bone marrow stromal cell OT - cytokine OT - doxorubicin OT - drug resistance EDAT- 2017/12/19 06:00 MHDA- 2019/03/19 06:00 CRDT- 2017/12/19 06:00 PHST- 2017/12/19 06:00 [pubmed] PHST- 2019/03/19 06:00 [medline] PHST- 2017/12/19 06:00 [entrez] AID - 10.1080/10428194.2017.1413188 [doi] PST - ppublish SO - Leuk Lymphoma. 2018 Sep;59(9):2220-2226. doi: 10.1080/10428194.2017.1413188. Epub 2017 Dec 18.