41 research outputs found
Harmonic Motion Imaging for Abdominal Tumor Detection and High-Intensity Focused Ultrasound Ablation Monitoring: An In Vivo Feasibility Study in a Transgenic Mouse Model of Pancreatic Cancer
Abstract-Harmonic motion imaging (HMI) is a radiationforce-based elasticity imaging technique that tracks oscillatory tissue displacements induced by sinusoidal ultrasonic radiation force to assess the resulting oscillatory displacement denoting the underlying tissue stiffness. The objective of this study was to evaluate the feasibility of HMI in pancreatic tumor detection and high-intensity focused ultrasound (HIFU) treatment monitoring. The HMI system consisted of a focused ultrasound transducer, which generated sinusoidal radiation force to induce oscillatory tissue motion at 50 Hz, and a diagnostic ultrasound transducer, which detected the axial tissue displacements based on acquired radio-frequency signals using a 1-D cross-correlation algorithm. For pancreatic tumor detection, HMI images were generated for pancreatic tumors in transgenic mice and normal pancreases in wild-type mice. The obtained HMI images showed a high contrast between normal and malignant pancreases with an average peak-to-peak HMI displacement ratio of 3.2. Histological analysis showed that no tissue damage was associated with HMI when it was used for the sole purpose of elasticity imaging. For pancreatic tumor ablation monitoring, the focused ultrasound transducer was operated at a higher acoustic power and longer pulse length than that used in tumor detection to simultaneously induce HIFU thermal ablation and oscillatory tissue displacements, allowing HMI monitoring without interrupting tumor ablation. HMI monitoring of HIFU ablation found significant decreases in the peak-to-peak HMI displacements before and after HIFU ablation with a reduction rate ranging from 15.8% to 57.0%. The formation of thermal lesions after HIFU exposure was confirmed by histological analysis. This study demonstrated the feasibility of HMI in abdominal tumor detection and HIFU ablation monitoring
Harmonic motion imaging for abdominal tumor detection and high-intensity focused ultrasound ablation monitoring: an in vivo feasibility study in a transgenic mouse model of pancreatic cancer
Effective Delivery of a Microtubule Polymerization Inhibitor Synergizes with Standard Regimens in Models of Pancreatic Ductal Adenocarcinoma
Supplementary Table 10 - 13 from Tumor Explants Elucidate a Cascade of Paracrine SHH, WNT, and VEGF Signals Driving Pancreatic Cancer Angiosuppression
Supplementary Table 10: Antibodies for IHC and IF.Overview of antibodies used for stainings in human PDAC or KPC-derived tissues.Supplementary Table 11: Primer sequences for qRT-PCR.Primers for qRT-PCR-based quantification of ChIP and mRNA samples.Supplementary Table 12: Freezer dryer settings for sponge production.Specific settings for optimal sponge production.Supplementary Table 13: Explant media composition.List of reagents used for human PDAC and murine explants.</p
Supplementary Table 8 from Tumor Explants Elucidate a Cascade of Paracrine SHH, WNT, and VEGF Signals Driving Pancreatic Cancer Angiosuppression
Lymphoid network.Regulatory network for PDAC-associated lymphoid cells, listing the inferred transcriptional targets (Target) for each regulatory protein (Regulator). Association weight (AW) and association mode (AM) are scores to quantify strength/direction of interaction. Sign indicates directionality of the interaction (1 = transactivating, -1 = transrepressing).</p
Supplementary Table 5 from Tumor Explants Elucidate a Cascade of Paracrine SHH, WNT, and VEGF Signals Driving Pancreatic Cancer Angiosuppression
Endothelial network.Regulatory network for PDAC-associated endothelial cells, listing the inferred transcriptional targets (Target) for each regulatory protein (Regulator). Association weight (AW) and association mode (AM) are scores to quantify strength/direction of interaction. Sign indicates directionality of the interaction (1 = transactivating, -1 = transrepressing).</p
Supplementary Table 5 from Tumor Explants Elucidate a Cascade of Paracrine SHH, WNT, and VEGF Signals Driving Pancreatic Cancer Angiosuppression
Endothelial network.Regulatory network for PDAC-associated endothelial cells, listing the inferred transcriptional targets (Target) for each regulatory protein (Regulator). Association weight (AW) and association mode (AM) are scores to quantify strength/direction of interaction. Sign indicates directionality of the interaction (1 = transactivating, -1 = transrepressing).</p
Supplementary Figure 7 from Tumor Explants Elucidate a Cascade of Paracrine SHH, WNT, and VEGF Signals Driving Pancreatic Cancer Angiosuppression
WNT Distribution and Expression of Downstream Targets.</p
Supplementary Figure 3 from Tumor Explants Elucidate a Cascade of Paracrine SHH, WNT, and VEGF Signals Driving Pancreatic Cancer Angiosuppression
Explant cellular populations.</p