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<p>Three-dimensional (3D) tumor–vessel models provide a physiologically relevant platform to study tumor-induced angiogenesis and evaluate therapeutic responses. However, imaging-based analysis of these models is often constrained by limited penetration depth and volumetric resolution. To overcome these challenges, we employed high-resolution photoacoustic microscopy (HR − PAM) to monitor and quantify angiogenesis within bioprinted tumor–vessel models under drug treatments. Compared to confocal microscopy, the PAM achieved a 1.6-fold increase in 1/e² penetration depth, enabling visualization of vascular structures up to ~1 mm in depth. Using our HR − PAM platform, we successfully monitored and quantified tumor-induced angiogenesis, and following treatment with antibiotics, observed significant suppression. This deep tissue and large-volume PAM platform provides enhanced 3D insights into the effects of antibiotics on angiogenesis, paving the way for more precise in vitro evaluations of therapeutic interventions and drug screening studies.</p><p></p>

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Photoacoustic microscopy reveals deep angiogenic responses in 3D bioprinted tumor–vessel models

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月13日

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  • Yongjae Jo,
  • Seokgyu Han,
  • Hyunjun Kye,
  • Jinhee Yoo,
  • Junhyung Kim,
  • Inki Kim,
  • Sungsu Park,
  • Byullee Park

摘要

Three-dimensional (3D) tumor–vessel models provide a physiologically relevant platform to study tumor-induced angiogenesis and evaluate therapeutic responses. However, imaging-based analysis of these models is often constrained by limited penetration depth and volumetric resolution. To overcome these challenges, we employed high-resolution photoacoustic microscopy (HR − PAM) to monitor and quantify angiogenesis within bioprinted tumor–vessel models under drug treatments. Compared to confocal microscopy, the PAM achieved a 1.6-fold increase in 1/e² penetration depth, enabling visualization of vascular structures up to ~1 mm in depth. Using our HR − PAM platform, we successfully monitored and quantified tumor-induced angiogenesis, and following treatment with antibiotics, observed significant suppression. This deep tissue and large-volume PAM platform provides enhanced 3D insights into the effects of antibiotics on angiogenesis, paving the way for more precise in vitro evaluations of therapeutic interventions and drug screening studies.