User Achievement | Nature Communications Study: Coherent Raman Supports Zhejiang University Research on the Mechanics of ACL-Bone Interfaces

Research Topic and Background

The article reviews a Nature Communications study from Zhejiang University-affiliated teams on the structural and mechanical relationships at the human anterior cruciate ligament enthesis, including both femoral and tibial insertion sites. These interfaces are mechanically demanding, structurally complex, and difficult to regenerate after injury, yet their mineral and organic gradients remain insufficiently understood.

Figure 1: Research outcome

Figure 2: UltraView-based SRS detection and visualization of ACP and HAps in femoral and tibial enthesis samples

Figure 3: Changes in mineral-particle composition across ACL enthesis interface regions

Key Contribution of Coherent Raman Imaging

The article explains that UltraView's stimulated Raman scattering analysis enabled precise detection and visualization of amorphous calcium phosphate (ACP) and hydroxyapatite particles (HAps) at the interface. ACP was observed in the early region of the tibial enthesis interface but not in the femoral interface, reinforcing the conclusion that the two insertion sites differ in both mineral composition and mechanical adaptation.

Key Finding: The femoral enthesis is better adapted to shear stress, while the tibial enthesis is stronger in tension.

Platform Capabilities: Up to 350 nm spatial resolution, up to 10 FPS imaging speed, multimodal imaging, and large-area spectral imaging workflows.

Figure 4: The paper acknowledges Vibronix for stimulated Raman imaging support

Authors and Sources:

Source 1: Fang, J., Wang, X., Lai, H., et al. (2024). Decoding the mechanical characteristics of the human anterior cruciate ligament entheses through graduated mineralization interfaces. Nature  Communications, 15, 9253.

Source 2: https://mp.weixin.qq.com/s/JU0nKrJaGlr5EsxpNv1E6w