Maryam Pourmaleki

All Publications

• Multiplexed Spatial Profiling of Hodgkin Reed-Sternberg Cell Neighborhoods in Classic Hodgkin Lymphoma. Clinical cancer research : an official journal of the American Association for Cancer Research Pourmaleki, M., Jones, C. J., Mellinghoff, S. D., Greenstein, B. D., Kumar, P., Foronda, M., Navarrete, D. A., Campos, C., Roshal, M., Schultz, N., Shah, S. P., Schietinger, A., Socci, N. D., Hollmann, T. J., Dogan, A., Mellinghoff, I. K. 2024; 30 (17): 3881-3893

  Abstract

  PURPOSE: Classic Hodgkin lymphoma (cHL) is a B-cell lymphoma that occurs primarily in young adults and, less frequently, in elderly individuals. A hallmark of cHL is the exceptional scarcity (1%-5%) of the malignant Hodgkin Reed-Sternberg (HRS) cells within a network of nonmalignant immune cells. Molecular determinants governing the relationship between HRS cells and their proximal microenvironment remain largely unknown.EXPERIMENTAL DESIGN: We performed spatially resolved multiplexed protein imaging and transcriptomic sequencing to characterize HRS cell states, cellular neighborhoods, and gene expression signatures of 23.6 million cells from 36 newly diagnosed Epstein-Barr virus (EBV)-positive and EBV-negative cHL tumors.RESULTS: We show that MHC-I expression on HRS cells is associated with immune-inflamed neighborhoods containing CD8+ T cells, MHC-II+ macrophages, and immune checkpoint expression (i.e., PD1 and VISTA). We identified spatial clustering of HRS cells, consistent with the syncytial variant of cHL, and its association with T-cell-excluded neighborhoods in a subset of EBV-negative tumors. Finally, a subset of both EBV-positive and EBV-negative tumors contained regulatory T-cell-high neighborhoods harboring HRS cells with augmented proliferative capacity.CONCLUSIONS: Our study links HRS cell properties with distinct immunophenotypes and potential immune escape mechanisms in cHL.

  View details for DOI 10.1158/1078-0432.CCR-24-0942

  View details for PubMedID 38949890