PMID- 37732622 OWN - NLM STAT- MEDLINE DCOM- 20231219 LR - 20231219 IS - 1532-4311 (Electronic) IS - 0882-0139 (Linking) VI - 52 IP - 8 DP - 2023 Nov TI - A Crosstalk Between Castration-Resistant Prostate Cancer Cells, M2 Macrophages, and NK Cells: Role of the ATM-PI3K/AKT-PD-L1 Pathway. PG - 941-965 LID - 10.1080/08820139.2023.2258930 [doi] AB - Castration-resistant prostate cancer (CRPC) in males is associated with a poor prognosis and a higher risk of treatment-related adverse effects, with high mortality among cancers globally. It is thus imperative to explore novel potential molecules with dual therapeutic and biomarker functions. Based on the recent research findings, the expression levels of ataxia telangiectasia mutant kinase (ATM) in prostate cancer (PC) tissues collected from CRPC patients were higher than hormone-dependent PC patients. Using CRPC cell lines (C4-2 and CWR22Rv1), the transwell chamber experiments revealed ATM promoted macrophage recruitment in CRPC cells in vitro via C-X-C motif chemokine ligand 12 (CXCL12). Further in vitro investigations demonstrated that polarized macrophages prevented NK cell recruitment and reduced the immunocidal activity of NK cells against CRPC cell lines. Moreover, ATM boosted programmed death receptor ligand 1 (PD-L1) expression while inhibiting NK group 2D (NKG2D) ligand expression in selected cell lines via PI3K/AKT signaling pathway. The in vivo investigations revealed ATM induced proliferation of CRPC and macrophage recruitment, while the NK cell recruitment was found to suppress ATM expression and CRPC proliferation. In conclusion, it could be demonstrated that inhibiting ATM increased the susceptibility of CRPC to NK cell inhibitors by dampening the CXCL12 and PI3K/AKT-PD-L1 pathways, thereby offering a novel and individualized treatment protocol for treating CRPC. FAU - Jin, Hongliang AU - Jin H AD - Department of Urology, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China. FAU - Zhu, Jin AU - Zhu J AD - Department of Urology, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China. FAU - Xuan, Rui AU - Xuan R AD - Department of Urology, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China. FAU - Zhou, Yibin AU - Zhou Y AD - Department of Urology, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China. FAU - Xue, Boxin AU - Xue B AD - Department of Urology, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China. FAU - Yang, Dongrong AU - Yang D AD - Department of Urology, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China. FAU - Gao, Jie AU - Gao J AD - Department of Urology, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China. FAU - Zang, Yachen AU - Zang Y AD - Department of Urology, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China. FAU - Xu, Lijun AU - Xu L AD - Department of Urology, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China. LA - eng PT - Journal Article DEP - 20231124 PL - England TA - Immunol Invest JT - Immunological investigations JID - 8504629 RN - EC 2.7.11.1 (Ataxia Telangiectasia Mutated Proteins) RN - EC 2.7.11.1 (ATM protein, human) RN - 0 (B7-H1 Antigen) RN - 0 (Ligands) RN - EC 2.7.1.- (Phosphatidylinositol 3-Kinases) RN - EC 2.7.11.1 (Proto-Oncogene Proteins c-akt) SB - IM MH - Humans MH - Male MH - Ataxia Telangiectasia Mutated Proteins/metabolism MH - B7-H1 Antigen/metabolism MH - Cell Line, Tumor MH - Killer Cells, Natural MH - Ligands MH - Macrophages/metabolism MH - Phosphatidylinositol 3-Kinases/metabolism MH - *Prostatic Neoplasms, Castration-Resistant/drug therapy/metabolism MH - Proto-Oncogene Proteins c-akt/metabolism OTO - NOTNLM OT - Ataxia telangiectasia mutated kinase (ATM) OT - PI3K/AKT pathway OT - castration-resistant prostate cancer (CRPC) OT - macrophage recruitment OT - natural killer cells OT - programmed death receptor ligand 1 (PD-L1) EDAT- 2023/09/21 12:42 MHDA- 2023/11/27 12:43 CRDT- 2023/09/21 08:07 PHST- 2023/11/27 12:43 [medline] PHST- 2023/09/21 12:42 [pubmed] PHST- 2023/09/21 08:07 [entrez] AID - 10.1080/08820139.2023.2258930 [doi] PST - ppublish SO - Immunol Invest. 2023 Nov;52(8):941-965. doi: 10.1080/08820139.2023.2258930. Epub 2023 Nov 24.