A new study by Folkert et al. (https://doi.org/10.1084/jem.20230420) defines an "iron-rich" subset of tumor-associated macrophages (iTAMs). The metabolism of heme leads to the degradation of the transcriptional repressor Bach1 and shapes the transcriptional profile of iTAMs. The endothelin receptor B in iTAMs signals tumor-supportive functions.
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http://dx.doi.org/10.1084/jem.20240951 | DOI Listing |
Small
November 2024
Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu, 300044, Taiwan.
The infiltration of cytotoxic T lymphocytes holds promise for suppressing even the most resilient metastatic tumors in immunotherapy. Polarizing tumor-associated macrophages (TAMs) and remodeling the immune-deficient tumor microenvironment (TME) can enhance T lymphocyte recruitment and infiltration. However, the immune privilege and low immunogenic responses of these aggressive tumor clusters often limit lymphocyte recruitment.
View Article and Find Full Text PDFJ Drug Target
October 2024
Department of Oncology, The Second Affiliated Hospital of Soochow University, Suzhou, P.R. China.
Eliciting tumour microenvironment (TME) activation in triple-negative breast cancer (TNBC) is crucial for effective anti-tumour therapies. The aim of this study is to employ pharmaceutical approaches to precisely deliver Ganoderma polysaccharide (GPS) to tumour sites, thereby enhancing TME activation. We first established a direct link between the accumulation of GPS within tumours and its efficacy in the TME activation.
View Article and Find Full Text PDFJ Exp Med
October 2024
Department of Cell Biology, School of Medicine, Johns Hopkins University, Baltimore, MD, USA.
A new study by Folkert et al. (https://doi.org/10.
View Article and Find Full Text PDFTheranostics
September 2024
Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, 210028, China.
Iron-based nanocarriers have demonstrated potential in redirecting tumor associated macrophages (TAMs) polarization towards the M1 phenotype, critical for activating the tumor microenvironment (TME) in triple negative breast cancer (TNBC). However, their real-world effectiveness is curtailed by insufficient Fe exposure and the absence of suitable synergists in tumors. We introduce an air bag-embedded iron-based MIL-101 metal-organic frameworks (MOF) for igniting the TME in TNBC through bubble-driven tumoral codelivery of Fe and lentinan.
View Article and Find Full Text PDFInt J Nanomedicine
September 2024
School of Clinical and Basic Medical Sciences, Medical Science and Technology Innovation Center, Shandong Provincial Hospital, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, 250000, People's Republic of China.
Introduction: Immunotherapy has led to a paradigm shift in reinvigorating treatment of cancer. Nevertheless, tumor associated macrophages (TAMs) experience functional polarization on account of the generation of suppressive metabolites, contributing to impaired antitumor immune responses.
Methods: Hence, metabolic reprogramming of tumor microenvironment (TME) can synergistically improve the efficacy of anti-tumor immunotherapy.
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