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GENE:

SIRPA (Signal Regulatory Protein Alpha)

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Other names: SIRPA, Signal Regulatory Protein Alpha, SHPS1, SIRP, BIT, MFR, P84, Tyrosine-Protein Phosphatase Non-Receptor Type Substrate 1, CD172 Antigen-Like Family Member A, Inhibitory Receptor SHPS-1, Macrophage Fusion Receptor, PTPNS1, SHPS-1, MYD-1, Brain-Immunoglobulin-Like Molecule With Tyrosine-Based Activation Motifs, Brain Ig-Like Molecule With Tyrosine-Based Activation Motifs, Protein Tyrosine Phosphatase, Non-Receptor Type Substrate 1, Tyrosine Phosphatase SHP Substrate 1, Signal-Regulatory Protein Alpha-1, Signal-Regulatory Protein Alpha-2, Signal-Regulatory Protein Alpha-3, Signal-Regulatory Protein Alpha, SHP Substrate 1, CD172a Antigen, Myd-1 Antigen, MyD-1 Antigen, SIRP-ALPHA-1, Sirp-Alpha-1, Sirp-Alpha-2, Sirp-Alpha-3, SIRPalpha2, SIRPalpha, CD172A, CD172a, SIRPA, MYD1, Bit
Associations
8d
A CD47 antibody with minimized erythrocyte and thrombocyte toxicities. (PubMed, Front Oncol)
These findings suggest that 1B2-10 demonstrates a favorable efficacy and safety profile, indicating great therapeutic potential for cancer. Based on these studies, 1B2-10 has been renamed as DS003 and is currently advancing through Phase I clinical trials in China to further evaluate its safety profile and preliminary efficacy in human subjects.
Journal
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SIRPA (Signal Regulatory Protein Alpha)
8d
Harnessing the innate immune system: a novel bispecific antibody targeting CD47 and CD24 for selective tumor clearance. (PubMed, J Immunother Cancer)
Our study presents the discovery of an anti-CD47/CD24 bispecific antibody that offers a promising therapeutic strategy to address the challenges associated with both the efficacy and safety of CD47-targeting agents, offers insight into macrophage-driven cancer immunotherapy, and could potentially provide a therapeutic option for patients non-responsive to immunotherapy.
Journal • IO biomarker
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CD47 (CD47 Molecule) • CD24 (CD24 Molecule) • SIRPA (Signal Regulatory Protein Alpha)
9d
Engineered macrophages accumulate in solid tumors and locally deliver immune-activating proteins to inhibit tumor progression. (PubMed, Transl Cancer Res)
The GEMs also improved the efficacy of ICIs in the ICI-resistant gene engineering tumor models and demonstrated significant anti-tumor efficacy in the metastasis models. Our study showed the potential clinical application of GEMs in the treatment of tumors.
Journal
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CD8 (cluster of differentiation 8) • SIRPA (Signal Regulatory Protein Alpha)
9d
Single-Cell Sequencing Reveals Novel Tumor Populations and Their Interplay with the Immune Microenvironment in a Pleomorphic Rhabdomyosarcoma. (PubMed, Int J Mol Sci)
The cytotoxic T cells in pRMS bear markers of exhaustion (LAG3, HAVCR2, EOMES), and the macrophages express myeloid checkpoint-related genes (SIGLEC1, SIRPA, CSF1R, HAVCR2). This transcriptomic data suggests that targeting MIF and APP signaling in pRMS may have therapeutic potential; however, studies on multiple-patient cohorts, protein verification, and in vitro and in vivo validation are still needed for clinical actionability.
Journal • IO biomarker
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CD74 (CD74 Molecule) • LAG3 (Lymphocyte Activating 3) • HAVCR2 (Hepatitis A Virus Cellular Receptor 2) • CXCL12 (C-X-C Motif Chemokine Ligand 12) • CSF1R (Colony stimulating factor 1 receptor) • SIGLEC1 (Sialic Acid Binding Ig Like Lectin 1) • SIRPA (Signal Regulatory Protein Alpha)
11d
Targeting phagocytosis checkpoints for cancer immunotherapy. (PubMed, Nat Rev Cancer)
In this Review, we examine the evidence supporting phagocytic checkpoints as targets for cancer therapy, while highlighting current challenges associated with this therapeutic strategy. We also offer recommendations for enhancing the efficacy and safety of this approach in future work.
Review • Journal
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ITGAM (Integrin, alpha M) • ITGB2 (Integrin Subunit Beta 2) • SIRPA (Signal Regulatory Protein Alpha) • SLAMF7 (SLAM Family Member 7)
11d
Mapping TAM-tumor crosstalk in glioma via ligand-receptor multi-omics: mechanisms of immune evasion. (PubMed, Front Immunol)
Our synthesis provides an appraisal of reproducible communication architectures in glioma and outlines pragmatic reporting standards and trial-ready pharmacodynamic endpoints for myeloid-informed precision immuno-oncology. We hope these insights will assist researchers and clinicians as they design multi-omics pipelines and interventions to convert suppressive ecosystems into responsive ones.
Review • Journal
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PD-1 (Programmed cell death 1) • CXCL8 (Chemokine (C-X-C motif) ligand 8) • CD73 (5'-Nucleotidase Ecto) • SPP1 (Secreted Phosphoprotein 1) • HMOX1 (Heme Oxygenase 1) • IL10 (Interleukin 10) • CSF1R (Colony stimulating factor 1 receptor) • ENTPD1 (Ectonucleoside Triphosphate Diphosphohydrolase 1) • SIRPA (Signal Regulatory Protein Alpha)
15d
Signal regulating proteins (SIRPs) participate in sarcoidosis granuloma formation by promoting immune cell aggregation. (PubMed, Respir Res)
SIRPα is robustly expressed in monocyte/macrophage lineages within human sarcoidosis tissues, and inhibition of SIRPs (ELA026) suppresses sarcoidosis granuloma formation by preventing macrophage adhesion/aggregation.
Journal
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TNFA (Tumor Necrosis Factor-Alpha) • IL1B (Interleukin 1, beta) • SIRPA (Signal Regulatory Protein Alpha)
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prednisone
18d
Oncolytic Newcastle-disease-virus-mediated CD47 blockade in preclinical melanoma and pancreatic cancer models. (PubMed, Mol Ther Oncol)
Although NDV-mediated CD47 blockade resulted in increased numbers of PD-1+ CD8 T cells, synergy between NDV, CD47, and PD-L1 blockade was limited. Together these data highlight the importance of considering tumor-intrinsic factors when combining cancer immunotherapies for improved outcomes.
Preclinical • Journal • PD(L)-1 Biomarker • IO biomarker
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CD8 (cluster of differentiation 8) • CD47 (CD47 Molecule) • SIRPA (Signal Regulatory Protein Alpha)
19d
Nanovescicles integrating PD-1-mediated targeting and CRISPR/Cas9-based CD47 editing for dual immune checkpoint blockade. (PubMed, J Control Release)
Our results establish a proof-of-concept for this dual-function nanovesicle approach, highlighting its potential to engage both adaptive and innate immunity synergistically. The BITE platform offers a versatile and targeted strategy to overcome immune resistance in cancer, representing a promising therapeutic avenue in biomedical engineering and nanomedicine.
Journal • Checkpoint inhibition
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PD-L1 (Programmed death ligand 1) • CD8 (cluster of differentiation 8) • CD47 (CD47 Molecule) • SIRPA (Signal Regulatory Protein Alpha)
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PD-L1 expression
23d
Ir(III) Complexes Convert Cold to Hot Tumors via Ferroptosis/Necroptosis-Driven Immunogenic Cell Death and Photosensitized CD47 Downregulation. (PubMed, Adv Sci (Weinh))
In 4T1 murine breast cancer models, Ir1-PDT achieves potent tumor suppression and transforms immunologically "cold" tumors into "hot" lesions through the synergistic interplay of ICD and CD47 pathway disruption. Collectively, this work establishes a photodynamic CD47-signaling platform for precise immune modulation, offering a clinically translatable alternative to conventional CD47-targeting therapies.
Journal
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SIRPA (Signal Regulatory Protein Alpha)
23d
Immunogenic cell death unlocks the potential for combined radiation and immunotherapy. (PubMed, Proc Natl Acad Sci U S A)
Our model predicts an optimal RT dose (6 to 8 Gy) for maximizing ICD, a dose-dependent abscopal effect, and a hierarchy of treatment efficacy, with SIRP[Formula: see text]-knockout macrophages exhibiting the strongest tumoricidal activity. These findings provide a quantitative framework for designing more effective combination therapies, leveraging ICD to enhance immune checkpoint inhibition and radiotherapy synergy.
Journal
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SIRPA (Signal Regulatory Protein Alpha)
1m
Recent progress in immune evasion mechanisms of triple-negative breast cancer. (PubMed, J Transl Med)
These novel combination strategies aim to overcome resistance to single-agent checkpoint inhibitors, while research explores monoclonal antibodies, bispecific antibodies, and antibody-drug conjugates (ADCs) within biomarker-driven personalized treatment frameworks. The ultimate goal is to improve survival and quality of life for TNBC patients through tailored immunotherapies.
Review • Journal • PD(L)-1 Biomarker • IO biomarker
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LAG3 (Lymphocyte Activating 3) • SIRPA (Signal Regulatory Protein Alpha)