Cited by 33Tissue Engineering and Regenerative MedicineWound Healing and TreatmentsImmune cells in cancer

Effect of source animal age upon macrophage response to extracellular matrix biomaterials

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LoPresti, Samuel T., Brown, Bryan N.·2018·Journal of Immunology and Regenerative Medicine

Abstract

Extracellular matrix biomaterials have been shown to promote constructive remodeling in many preclinical and clinical applications. This response has been associated with the promotion of a timely switch from pro-inflammatory (M1) to anti-inflammatory (M2) macrophages. A previous study has shown that this beneficial response is lost when these biomaterials are derived from aged animals. This study examined the impact of small intestine submucosa (SIS) derived from 12, 26 and 52 week old pigs on the phenotype and function of bone marrow macrophages derived either from 2 or 18 month old mice. Results showed that 52 week old SIS promoted less iNOS in 2 month macrophages and Fizz1 expression in 2 and 18 month compared to 12 week SIS. Pro-inflammatory cytokine exposure to 52 week SIS-treated macrophages resulted in higher iNOS in 18 month macrophages and reduced MHC-II expression in 2 month macrophages, as well as reduced nitric oxide production in comparison to 12 week SIS. These results indicate that ECM derived from aged animals promotes an altered macrophage phenotype compared to young controls. This suggests that sourcing of ECM from young donors is important to preserve constructive remodeling outcomes of ECM biomaterials. Alteration of macrophage phenotype by aged ECM also raises the hypothesis that alterations in aged ECM may play a role in immune dysfunction in aged individuals.

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Crossref · 10.1016/j.regen.2018.03.004

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  • SIS obtained from 52-week-old pigs elicited diminished iNOS production in 2-month macrophages and suppressed Fizz 1 expression in both 2 and 18-month macrophages compared to 12-week SIS, suggesting that ECM derived from aged animals results in a distinct macrophage phenotype compared to younger controls.

    “According to the findings, SIS obtained from 52-week-old pigs elicited diminished iNOS production in 2-month macrophages and suppressed Fizz 1 expression in both 2 and 18-month macrophages in comparison to 12-week SIS. The study suggested that ECM derived from aged animals results in a distinct macrophage phenotype compared to younger controls, emphasizing the importance of sourcing ECM from young”

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Authors
LoPresti, S. T., & Brown, B. N.
Affiliations
University of Pittsburgh (US)
Corresponding author
Brown, Bryan N.
Venue
Journal of Immunology and Regenerative Medicine
Publisher
Elsevier BV
Published
2018-03
Volume
1
Pages
57-66
ISSN
2468-4988 (ISSN-L)
OpenAlex
W2799621257
Cited by
33
References
85
Citations by year
2025: 6 · 2024: 4 · 2023: 2 · 2022: 5 · 2021: 2 · 2020: 7 · 2019: 7
FWCI
4.16
Type
journal article
Language
en
Open access
Locations
  • Journal of Immunology and Regenerative Medicine (acceptedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institutes of Health (K12HD043441, R03AG043606, R01AG055564, T32EB001026)
Topics
  • Health Sciences › Medicine › Surgery › Tissue Engineering and Regenerative Medicine
  • Health Sciences › Medicine › Rehabilitation › Wound Healing and Treatments
  • Life Sciences › Immunology and Microbiology › Immunology › Immune cells in cancer
Keywords
extracellular matrix biomaterials, donor age, macrophage phenotype, macrophage polarization, small intestinal submucosa, bone marrow-derived macrophages, inducible nitric oxide synthase, Fizz1, nitric oxide, MHC class II, tissue remodeling, aging

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