Cited by 92Biomarkers in Disease MechanismsInflammation biomarkers and pathwaysCytokine Signaling Pathways and Interactions

The Development of Serum Amyloid P as a Possible Therapeutic

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Pilling, Darrell, Gomer, Richard H.·2018·Frontiers in Immunology

Abstract

Pentraxins such as serum amyloid P (SAP; also known as PTX2) regulate several aspects of the innate immune system. SAP inhibits the differentiation of monocyte-derived fibroblast-like cells called fibrocytes, promotes the formation of immuno-regulatory macrophages, and inhibits neutrophil adhesion to extracellular matrix proteins. In this minireview, we describe how these effects of SAP have led to its possible use as a therapeutic, and how modulating SAP effects might be used for other therapeutics. Fibrosing diseases such as pulmonary fibrosis, cardiac fibrosis, liver fibrosis, and renal fibrosis are associated with 30-45% of deaths in the US. Fibrosis involves both fibrocyte differentiation and profibrotic macrophage differentiation, and possibly because SAP inhibits both of these processes, in 9 different animal models, SAP inhibited fibrosis. In Phase 1B and Phase 2 clinical trials, SAP injections reduced the decline in lung function in pulmonary fibrosis patients, and in a small Phase 2 trial SAP injections reduced fibrosis in myelofibrosis patients. Acute respiratory distress syndrome/ acute lung injury (ARDS/ALI) involves the accumulation of neutrophils in the lungs, and possibly because SAP inhibits neutrophil adhesion, SAP injections reduced the severity of ARDS in an animal model. Conversely, depleting SAP is a potential therapeutic for amyloidosis, topically removing SAP from wound fluid speeds wound healing in animal models, and blocking SAP binding to one of its receptors makes cultured macrophages more aggressive toward tuberculosis bacteria. These results suggest that modulating pentraxin signaling might be useful for a variety of diseases.

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Crossref · 10.3389/fimmu.2018.02328

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  • CPHPC efficiently binds to SAP, leading to the dissociation of SAP from bound amyloids and subsequent depletion of SAP levels in the body.

    “This compound efficiently binds to SAP, leading to the dissociation of SAP from bound amyloids and subsequent depletion of SAP levels in the body24,62–68.”

    From Serum amyloid P secreted by bone marrow adipocytes drives skeletal amyloidosis (2025) · cites this paper as [24]

    In “Removing stuck SAP as a possible therapeutic for amyloidosis” (page unavailable), the paper says a small molecule causes two human SAP pentamers to bind together, after which the complex is quickly cleared from circulation; it also reports reduced serum SAP in mice. It does not identify the compound as CPHPC or say that it dissociates SAP already bound to amyloid deposits, so those parts of the claim are unsupported by our copy. (LLM, conf=0.84)

    Experimental — accuracy not yet measured

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Authors
Pilling, D., & Gomer, R. H.
Affiliations
Texas A&M University (US)
Corresponding author
  • Pilling, Darrell
  • Gomer, Richard H.
Venue
Frontiers in Immunology
Published
2018-10-16
Volume
9
Pages
2328-2328
ISSN
1664-3224 (ISSN-L)
OpenAlex
W2896540448
Cited by
92
References
176
Citations by year
2026: 8 · 2025: 8 · 2024: 16 · 2023: 13 · 2022: 15 · 2021: 19 · 2020: 9 · 2019: 4
FWCI
0.82
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Immunology (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Institutes of Health
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Biomarkers in Disease Mechanisms
  • Life Sciences › Immunology and Microbiology › Immunology › Inflammation biomarkers and pathways
  • Health Sciences › Medicine › Oncology › Cytokine Signaling Pathways and Interactions
Keywords
serum amyloid P component, pentraxins, innate immunity, fibrosis, pulmonary fibrosis, myocardial fibrosis, liver fibrosis, renal fibrosis, myelofibrosis, acute respiratory distress syndrome, acute lung injury, neutrophil adhesion, fibrocyte differentiation, macrophage differentiation, amyloidosis, wound healing, tuberculosis, therapeutic target
MeSH terms
Serum Amyloid P-Component, Amyloidosis, Animals, Clinical Trials as Topic, Fibroblasts, Fibrosis, Multigene Family, Humans, Macrophages, Neutrophils, Tuberculosis, Wound Healing, Signal Transduction, Immunomodulation

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