PMID- 38481730 OWN - NLM STAT- MEDLINE DCOM- 20240315 LR - 20240315 IS - 2162-402X (Electronic) IS - 2162-4011 (Print) IS - 2162-4011 (Linking) VI - 13 IP - 1 DP - 2024 TI - Prognostic impact of the bone marrow tumor microenvironment, HLA-I and HLA-Ib expression in MDS and CMML progression to sAML. PG - 2323212 LID - 10.1080/2162402X.2024.2323212 [doi] LID - 2323212 AB - Genetic aberrations and immune escape are fundamental in MDS and CMML initiation and progression to sAML. Therefore, quantitative and spatial immune cell organization, expression of immune checkpoints (ICP), classical human leukocyte antigen class I (HLA-I) and the non-classical HLA-Ib antigens were analyzed in 274 neoplastic and 50 non-neoplastic bone marrow (BM) biopsies using conventional and multiplex immunohistochemistry and correlated to publicly available dataset. Higher numbers of tissue infiltrating lymphocytes (TILs) were found in MDS/CMML (8.8%) compared to sAML (7.5%) and non-neoplastic BM (5.3%). Higher T cell abundance, including the CD8(+) T cell subset, inversely correlated with the number of pathogenic mutations and was associated with blast BM counts, ICP expression, spatial T cell distribution and improved patients' survival in MDS and CMML. In MDS/CMML, higher PD-1/PD-L1/PD-L2 and HLA-I, but lower HLA-G expression correlated with a significantly better patients' outcome. Moreover, a closer spatial proximity of T cell subpopulations and their proximity to myeloid blasts showed a stronger prognostic impact when compared to TIL numbers. In sAML - the continuum of MDS and CMML - the number of TILs had no impact on prognosis, but higher CD28 and HLA-I expression correlated with a better outcome of sAML patients. This study underlines the independent prognostic value of the tumor microenvironment in MDS/CMML progression to sAML, which shows the most pronounced immune escape. Moreover, new prognostic markers, like HLA-G expression and spatial T cell distribution, were described for the first time, which might also serve as therapeutic targets. CI - (c) 2024 The Author(s). Published with license by Taylor & Francis Group, LLC. FAU - Bauer, Marcus AU - Bauer M AD - Institute of Pathology, University Hospital Halle, Martin Luther University Halle-Wittenberg, Halle, Germany. FAU - Jakel, Nadja AU - Jakel N AD - Department of Hematology, University Hospital Halle, Martin Luther University Halle-Wittenberg, Halle, Germany. FAU - Wilfer, Andreas AU - Wilfer A AD - Institute of Pathology, University Hospital Halle, Martin Luther University Halle-Wittenberg, Halle, Germany. AD - Krukenberg Cancer Center Halle, University Hospital Halle, Martin Luther University Halle-Wittenberg, Halle, Germany. FAU - Haak, Anja AU - Haak A AD - Institute of Pathology, University Hospital Halle, Martin Luther University Halle-Wittenberg, Halle, Germany. FAU - Eszlinger, Markus AU - Eszlinger M AD - Institute of Pathology, University Hospital Halle, Martin Luther University Halle-Wittenberg, Halle, Germany. FAU - Kelemen, Katalin AU - Kelemen K AD - Institute of Pathology, University Hospital Halle, Martin Luther University Halle-Wittenberg, Halle, Germany. FAU - Haemmerle, Monika AU - Haemmerle M AD - Institute of Pathology, University Hospital Halle, Martin Luther University Halle-Wittenberg, Halle, Germany. FAU - Al-Ali, Haifa Kathrin AU - Al-Ali HK AD - Department of Hematology, University Hospital Halle, Martin Luther University Halle-Wittenberg, Halle, Germany. AD - Krukenberg Cancer Center Halle, University Hospital Halle, Martin Luther University Halle-Wittenberg, Halle, Germany. FAU - Seliger, Barbara AU - Seliger B AD - Medical Faculty, Martin Luther University Halle-Wittenberg, Halle, Germany. AD - Medical Faculty, Fraunhofer Institute for Cell Therapy and Immunology, Leipzig, Germany. AD - Institute of Translational Immunology, Medical School "Theodor Fontane", Brandenburg an der Havel, Germany. FAU - Wickenhauser, Claudia AU - Wickenhauser C AD - Institute of Pathology, University Hospital Halle, Martin Luther University Halle-Wittenberg, Halle, Germany. LA - eng PT - Journal Article DEP - 20240306 PL - United States TA - Oncoimmunology JT - Oncoimmunology JID - 101570526 RN - 0 (HLA-G Antigens) SB - IM MH - Humans MH - Prognosis MH - *HLA-G Antigens/metabolism MH - *Bone Marrow/metabolism MH - Tumor Microenvironment/genetics MH - CD8-Positive T-Lymphocytes PMC - PMC10936680 OTO - NOTNLM OT - HLA-G OT - HLA-I OT - TILs OT - immune escape OT - myeloid neoplasm OT - spatial immune cell organization OT - tumor microenvironment COIS- No potential conflict of interest was reported by the author(s). EDAT- 2024/03/14 06:46 MHDA- 2024/03/15 06:44 PMCR- 2024/03/06 CRDT- 2024/03/14 04:13 PHST- 2024/03/15 06:44 [medline] PHST- 2024/03/14 06:46 [pubmed] PHST- 2024/03/14 04:13 [entrez] PHST- 2024/03/06 00:00 [pmc-release] AID - 2323212 [pii] AID - 10.1080/2162402X.2024.2323212 [doi] PST - epublish SO - Oncoimmunology. 2024 Mar 6;13(1):2323212. doi: 10.1080/2162402X.2024.2323212. eCollection 2024.