Cellular Interactions with Nanotopographical Substrates

Cells sense and respond to nanometre-scale features on underlying substrates via integrin-mediated adhesion and mechanotransductive pathways. These interactions modulate cell morphology, cytoskeletal organisation and nuclear mechanics, thereby influencing gene expression programmes. Nanotopographical substrates—engineered with controlled patterns such as pits, grooves or fibres—provide physical cues that guide cell adhesion strength, migration, proliferation and differentiation. At the implant interface, tailored micro- and nano-structures can reduce immune cell activation or promote osteointegration, while in vitro platforms exploit nanotopographical gradients to screen optimal feature dimensions for specific cell behaviours. Mechanistic studies reveal that the adsorbed protein layer stabilises focal adhesion assembly, linking extracellular architecture to intracellular force generation and nuclear deformation. Collectively, this body of work underpins the rational design of biomaterials for regenerative medicine, tissue engineering and cellular reprogramming, emphasising the global importance of interfacing cells with nanoscale surface features.

Research from Nature Portfolio

Recent studies have demonstrated that a symmetrical array of hexagonal pits on silicone and hydrogel substrates markedly reduces macrophage and fibroblast adhesion, thereby limiting pro-fibrotic activation and cell proliferation. Directional gradients of nanotopographical features fabricated on elastomeric substrates have enabled high-throughput screening of osteoblast contact guidance, revealing that specific amplitude and wavelength ranges optimise adhesion or alignment with minimal experimental effort. Investigations using aligned fibrous nanostructures show that adipose-derived stem cells adopt elongated morphologies on orientated substrates, directly coupling topographical alignment to myogenic versus osteogenic lineage commitment through dynamic shape analysis over extended culture periods.

Research from all publishers

Advanced investigations into neuronal reprogramming report that reducing intracellular tension and cell adhesion via micro- and nano-scale surface features promotes euchromatin formation and decreases DNA methylation at neuronal gene promoters, significantly boosting conversion efficiency. Studies of human bone marrow-derived mesenchymal stem cells on aligned topographies reveal that focal adhesion-mediated alterations in single-cell stiffness and subsequent nuclear localisation of YAP modulate downstream osteogenic differentiation. Fundamental work on protein adsorption at nanostructured interfaces highlights that the initial layer of extracellular matrix proteins directs focal adhesion patterning and mechanotransductive signalling, ultimately governing myogenic differentiation in muscle precursor cells.

Cellular Interactions with Nanotopographical Substrates publication trend

The graph below shows the total number of articles in cellular interactions with nanotopographical substrates across all publications each year (not limited to Nature Index journals).

Technical terms

Nanotopography: The arrangement of physical features on a surface at nanometre scale that influence cell-substrate interactions.

Focal adhesion: Multiprotein complexes that physically link integrins to the actin cytoskeleton, mediating cell adhesion and mechanotransduction.

Integrin: Transmembrane receptors that bind extracellular matrix proteins and initiate intracellular signalling cascades in response to mechanical cues.

Mechanotransduction: The process by which cells convert mechanical stimuli from their environment into biochemical signals affecting behaviour and fate.

Chromatin structure: The organisation of DNA and histone proteins in the cell nucleus, whose compaction state regulates gene accessibility and expression.

References

1. Reduction of Intracellular Tension and Cell Adhesion Promotes Open Chromatin Structure and Enhances Cell Reprogramming. Advanced Science (2023).
2. Directional nanotopographic gradients: a high-throughput screening platform for cell contact guidance. Scientific Reports (2015).
3. Protein Adsorption as a Key Mediator in the Nanotopographical Control of Cell Behavior. ACS Nano (2016).
4. A micron-scale surface topography design reducing cell adhesion to implanted materials. Scientific Reports (2018).
5. Relationship between nanotopographical alignment and stem cell fate with live imaging and shape analysis. Scientific Reports (2016).
6. Topography induced stiffness alteration of stem cells influences osteogenic differentiation. Biomaterials Science (2020).