ArticleImmunity2020
CD47 Ligation Repositions the Inhibitory Receptor SIRPA to Suppress Integrin Activation and Phagocytosis.
Article in Immunity, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 139 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
139 citing papers in PubMed, 228 citations in OpenAlex.
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- Phagocytosis of necroptotic cells optimizes type 1 conventional dendritic cells for induction of a cytotoxic T-cell response.Cell death and differentiation · 2026Article
- SIRPα Cleavage Is Associated with Inflammatory Response, Corticosteroid Nonresponse, and Worse Prognosis in Clinical and Preclinical Models of Alcohol-Associated Hepatitis.The American journal of pathology · 2026Article
- Laser microdissection-based multi-omics integration unveils the pathological atlas and tumor differentiation network of adamantinomatous craniopharyngioma.Acta neuropathologica communications · 2026Article
- SIRPα ablated iPSC-derived macrophages resist hypophagia and enhance mAb-dependent and CAR-mediated cytotoxicity of solid tumors.Molecular therapy. Oncology · 2026Article
- Unveiling anti-atherosclerotic targets of Perilla frutescens through a multi-scale computational framework integrating network pharmacology, single-cell analysis, machine learning, and molecular dynamics.Bioresources and bioprocessing · 2026Article
- mRNA-laden LNP-enabled in situ CAR-macrophage alleviates liver fibrosis via inhibiting activated HSCs and modulating the immune microenvironment.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- New Analogs of the Compstatin Family of Clinical Complement Inhibitors with Low Picomolar Target Affinity.Journal of medicinal chemistry · 2026Article
- Targeting glutamine metabolism to modulate macrophage functions in the tumor microenvironment.Discover oncology · 2026Review
- ID1 in TAMs promoted the progression of non-small-cell carcinoma via increasing NF-κB/NPM1/SHP1/SHP2 signaling induced M2 polarization.Scientific reports · 2026Article
- MERTK coordinates efferocytosis by regulating integrin localization and activation.Journal of cell science · 2026Article
- Targeting phagocytosis checkpoints for cancer immunotherapy.Nature reviews. Cancer · 2026Review
- Inflammation-responsive biomimetic hybrid nanovesicles reverse stem cell senescence by up-regulating SIRT1 to treat periodontitis.Journal of nanobiotechnology · 2026Article
- Post-translational modifications of immune checkpoints: molecular mechanisms, tumor microenvironment remodeling, and therapeutic implications.Journal of biomedical science · 2026Review
79 more citing papers are in PubMed but not listed here.
Corrections and comments
- Erratum issued
Authors and funding
3 authors at 1 institution in 1 country.
Funding
Abstract
CD47 acts as a "don't eat me" signal that protects cells from phagocytosis by binding and activating its receptor SIPRA on macrophages. CD47 suppresses multiple different pro-engulfment "eat me" signals, including immunoglobulin G (IgG), complement, and calreticulin, on distinct target cells. This complexity has limited understanding of how the "don't eat me" signal is transduced biochemically. Here, we utilized a reconstituted system with a defined set of signals to interrogate the mechanism of SIRPA activation and its downstream targets. CD47 ligation altered SIRPA localization, positioning SIRPA for activation at the phagocytic synapse. At the phagocytic synapse, SIRPA inhibited integrin activation to limit macrophage spreading across the surface of the engulfment target. Chemical reactivation of integrin bypassed CD47-mediated inhibition and rescued engulfment, similar to the effect of a CD47 function-blocking antibody. Thus, the CD47-SIRPA axis suppresses phagocytosis by inhibiting inside-out activation of integrin signaling in the macrophage, with implications to cancer immunotherapy applications.
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What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.