Immune responses are complex, often defying rigid classifications. Instead of interpreting results according to reductionist categories, researchers should rely on comprehensive single-cell data to guide analysis and should remain open to unexpected immunological complexity.
This is a preview of subscription content, access via your institution
Relevant articles
Open Access articles citing this article.
-
Immunomodulatory biomaterials for treating chronic inflammation at mucosal sites
npj Biomedical Innovations Open Access 12 December 2025
Access options
Subscribe to this journal
Receive 12 digital issues and online access to articles
$119.00 per year
only $9.92 per issue
Buy this article
- Purchase on SpringerLink
- Instant access to the full article PDF.
USD 39.95
Prices may be subject to local taxes which are calculated during checkout

References
Sadtler, K. et al. The scaffold immune microenvironment: biomaterial-mediated immune polarization in traumatic and nontraumatic applications. Tissue Eng. Part A 23, 144–1053 (2017).
Hu, C. et al. Dissecting the microenvironment around biosynthetic scaffolds in murine skin wound healing. Sci. Adv. 7, eabf0787 (2021).
Chen, S. et al. Integrated -omics profiling unveils the disparities of host defense to ECM scaffolds during wound healing in aged individuals. Biomaterials 311, 122685 (2024).
Doloff, J. C. et al. Colony stimulating factor-1 receptor is a central component of the foreign body response to biomaterial implants in rodents and non-human primates. Nat. Mater. 16, 671–680 (2017).
Wang, H. & Mooney, D. J. Biomaterial-assisted targeted modulation of immune cells in cancer treatment. Nat. Mater. 17, 761–772 (2018).
Adusei, K. M., Ngo, T. B. & Sadtler, K. T lymphocytes as critical mediators in tissue regeneration, fibrosis, and the foreign body response. Acta Biomater. 133, 17–33 (2021).
Zielinski, C. E. T helper cell subsets: diversification of the field. Eur. J. Immunol. 53, e2250218 (2023).
Rogozynski, N. P. & Dixon, B. The Th1/Th2 paradigm: a misrepresentation of helper T cell plasticity. Immunol. Lett. 268, 106870 (2024).
Doloff, J. C. & Waxman, D. J. VEGF receptor inhibitors block the ability of metronomically dosed cyclophosphamide to activate innate immunity–induced tumor regression. Cancer Res. 72, 1103–1115 (2012).
Kerr, M. D. et al. Immune-responsive biodegradable scaffolds for enhancing neutrophil regeneration. Bioeng. Transl. Meds 8, e10309 (2023).
Elisia, I. et al. Comparison of RAW264.7, human whole blood and PBMC assays to screen for immunomodulators. J. Immunol. Meth. 452, 26–31 (2018).
Doloff, J. C. et al. Identification of a humanized mouse model for functional testing of immune-mediated biomaterial foreign body response. Sci. Adv. 9, eade9488 (2023).
King, A., Sandler, S. & Andersson, A. The effect of host factors and capsule composition on the cellular overgrowth on implanted alginate capsules. J. Biomed. Mater. Res. 57, 374–383 (2001).
Neshat, S. Y. et al. Improvement of islet engrafts via treg induction using immunomodulating polymeric tolerogenic microparticles. ACS Biomater. Sci. Eng. 9, 3522–3534 (2023).
Márquez, E. J. et al. Sexual-dimorphism in human immune system aging. Nat. Commun. 11, 751 (2020).
Acknowledgements
This work was supported by the US National Institutes of Health (NIH) through grant R01 DE031488 (H.-Q.M. and J.C.D.), NIH National Institute of Biomedical Imaging and Bioengineering grant P41EB028239 (J.P.S. and H.-Q.M.), NIH National Cancer Institute grant R33CA278429 (J.P.S.), and NIH National Institute of Dental and Craniofacial Research grant F31DE032900 (J.L.S.), as well as by the Biomedical Engineering Department at Johns Hopkins University (J.C.D.). J.L.S. was also supported by an ARCS Foundation Metropolitan Washington Chapter scholar award.
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Competing interests
The authors declare no competing interests.
Peer review
Peer review information
Nature Reviews Bioengineering thanks Alessandra Cambi, Diana Boraschi and Eric Appel for their contribution to the peer review of this work.
Rights and permissions
About this article
Cite this article
Stelzel, J.L., Schneck, J.P., Mao, HQ. et al. Oversimplified immunology is holding biomaterials back. Nat Rev Bioeng 3, 523–525 (2025). https://doi.org/10.1038/s44222-025-00320-7
Published:
Version of record:
Issue date:
DOI: https://doi.org/10.1038/s44222-025-00320-7
This article is cited by
-
Immunomodulatory biomaterials for treating chronic inflammation at mucosal sites
npj Biomedical Innovations (2025)