It is envisaged that the creation of cellular environments at multiple length scales, that recapitulate in vivo bioactive and structural roles, may hold the key to creating functional, complex tissues in the laboratory. This review considers recent advances in biofabrication and bioprinting techniques across different length scales. Particular focus is placed on 3D printing of hydrogels and fabrication of biomaterial fibres that could extend the feature resolution and material functionality of soft tissue constructs. The outlook from this review discusses how one might create and simulate microenvironmental cues in vitro. A fabrication platform that integrates the competencies of different biofabrication technologies is proposed. Such a multi-process, multiscale fabrication strategy may ultimately translate engineering capability into an accessible life sciences toolkit, fulfilling its potential to deliver in vitro disease models and engineered tissue implants.
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http://dx.doi.org/10.1007/s42242-018-0014-1 | DOI Listing |
Am J Physiol Cell Physiol
March 2025
CIC bioGUNE, Basque Research and Technology Alliance, BRTA, Technological Park of Bizkaia, Derio, Spain.
The onset, development and progression of cancer are greatly influenced by the microenvironmental cues originating from diverse elements within the tumor niche. Extracellular matrix (ECM), the complex and dynamic macromolecular 3D network, governs cell functionality and play key roles in tumor growth and spreading. This article highlights the significance of ECM-based bioscaffolds in providing a relevant microenvironment not only for studying tumor behavior and drug efficacy but also for narrowing the gap between translational cancer research and targeted cancer treatment.
View Article and Find Full Text PDFNature
February 2025
Department of Cancer Biology, Dana Farber Cancer Institute, Boston, MA, USA.
Gliomas are incurable malignancies notable for having an immunosuppressive microenvironment with abundant myeloid cells, the immunomodulatory phenotypes of which remain poorly defined. Here we systematically investigate these phenotypes by integrating single-cell RNA sequencing, chromatin accessibility, spatial transcriptomics and glioma organoid explant systems. We discovered four immunomodulatory expression programs: microglial inflammatory and scavenger immunosuppressive programs, which are both unique to primary brain tumours, and systemic inflammatory and complement immunosuppressive programs, which are also expressed by non-brain tumours.
View Article and Find Full Text PDFResearch (Wash D C)
February 2025
State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, Center of Advanced Pharmaceuticals and Biomaterials, China Pharmaceutical University, Nanjing 211198, P.R. China.
Macrophages are ubiquitous within the human body and serve pivotal roles in immune surveillance, inflammation, and tissue homeostasis. Phenotypic plasticity is a hallmark of macrophages, allowing their polarization into distinct phenotypes M1 (pro-inflammatory, anti-tumor) and M2 (anti-inflammatory, pro-tumor) in response to local microenvironmental cues. In tumor tissues, the polarization of tumor-associated macrophages profoundly shapes the tumor microenvironment, influencing tumor progression, immune evasion, and metastasis.
View Article and Find Full Text PDFAdv Drug Deliv Rev
April 2025
Wellman Center for Photomedicine, Massachusetts General Hospital (MGH), Department of Dermatology, Harvard Medical School (HMS), Boston, MA 02114, USA. Electronic address:
Light, a non-invasive tool integrated with cutting-edge nanotechnologies, has driven transformative advancements in imaging-based diagnosis and drug delivery for cancer and bacterial treatments. This review discusses recent progress in these areas, beginning with emerging imaging technologies. Unlike traditional photosensors activated by visible light, alternative energy sources such as near-infrared (NIR) light, X-rays, and ultrasound have been extensively investigated to activate various photosensors, achieving high sensitivity, wavelength versatility, and spatial resolution for deep-tissue imaging.
View Article and Find Full Text PDFPLoS Genet
February 2025
Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, United Kingdom.
Tissue maintenance is underpinned by resident stem cells whose activity is modulated by microenvironmental cues. Using Drosophila as a simple model to identify regulators of stem cell behaviour and survival in vivo, we have identified novel connections between the conserved transmembrane proteoglycan Syndecan, nuclear properties and stem cell function. In the Drosophila midgut, Syndecan depletion in intestinal stem cells results in their loss from the tissue, impairing tissue renewal.
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