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Currently, you can access the following clinical trials being conducted worldwide:

370533 studies
219 countries
Clinical trial information and results are updated daily from ClinicalTrials.gov. The latest data update was conducted on 04/15/2021.
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Clinical trial information and results are updated daily from ClinicalTrials.gov. The latest data update was conducted on 04/15/2021.
  • Macrophage Activation (CD47)

    The safety and efficacy of the agents and/or uses under investigation have not been established. There is no guarantee that the agents will receive health authority approval or become commercially available in any country for the uses being investigated.


    The expression of the cell-surface molecule CD47 inhibits the phagocytosis of cells by macrophages and plays a pivotal role in the ability of the immune system to distinguish between self and nonself.1-4 Loss of CD47 expression results in the cell being “marked” for phagocytosis.2

    CD47 regulates immune self-recognition through direct interaction with SIRPα.2 SIRPα is a cell-surface marker that is expressed primarily in the immune compartment, specifically macrophages, neutrophils, dendritic cells, and monocytes.2 Signaling through the CD47/SIRPα axis at cytotoxic synapses, including those formed between macrophages and cancer cells, may prevent tumor cell phagocytosis.2,5

    CD47 has been shown to be upregulated in numerous malignancies, including non-Hodgkin lymphoma (NHL).1-3 The upregulation of CD47 by tumor cells has been implicated in the ability of tumors to evade immune system surveillance. It has also been linked to metastasis and spread of tumor cells.2

    Preclinical data suggest that blocking CD47/SIRPα signaling with anti-CD47 antibodies reduces tumor burden in both in vitro and mouse models of NHL.3,4 Evidence suggests that this occurs primarily by removal of tumor cells through phagocytosis by macrophages.1-4 However, it may also occur via induction of tumor cell apoptosis,1,3 activation of antibody-dependent cellular cytotoxicity,1,3 and activation of adaptive immune responses via presentation of tumor antigens to T cells following phagocytic uptake.1,6

    View Related Molecules


    1. Chao MP, et al. Curr Opin Immunol. 2012;24:225-232. PMID: 22310103
    2. Barclay AN, et al. Annu Rev Immunol. 2014;32:25-50. PMID: 24215318
    3. Chao MP, et al. Cell. 2010;142:699-713. PMID: 20813259
    4. Chao MP, et al. Blood. 2011;118:4890-4901. PMID: 21828138
    5. Majeti R, et al. Cell. 2009;138:286-299. PMID: 19632179
    6. Tseng D, et al. Proc Natl Acad Sci U S A. 2013;110:11103-11108. PMID: 23690610
    7. Oldenborg PA, et al. Science. 2000;288:1-4. PMID: 10856220
    8. Jaiswal S, et al. Cell. 2009;138:271-285. PMID: 19632178
    9. Rendtlew Danielsen JM, et al. Br J Haematol. 2007;138:756-760. PMID: 17760807
    10. Willingham SB, et al. Proc Natl Acad Sci U S A. 2012;109:6662-6667. PMID: 22451913
    11. Jaiswal S, et al. Trends Immunol. 2010;31:212-219. PMID: 20452821