generation-liver-orthotopic-human-uveal-melanoma-xenograft-platform

Generation of a Liver Orthotopic Human Uveal Melanoma Xenograft Platform in Immunodeficient Mice

In recent decades, subcutaneously implanted patient-derived xenograft tumors or cultured human cell lines have been increasingly recognized as more ...

Osaka City University Graduate School of Medicine

Thomas Jefferson University

The aim of this study was to examine the actual temperature during lung radiofrequency ablation (RFA) and pathological changes due to thermal damage in the pleural tissue of the chest wall in a rabbit model.

Chest wall temperature during radiofrequency ablation in a normal rabbit lung model.

The purpose of this study was to characterize the imaging spectrum of benign notochordal cell tumors (BNCTs) and chondromas and to determine if this helped in differentiating BNCTs from chordomas.

Differentiating benign notochordal cell tumors from chordomas: radiographic features on MRI, CT, and tomography.

To evaluate whether the combination of radiofrequency (RF) ablation and local injection of the immunostimulant Mycobacterium bovis bacillus Calmette-Guérin (BCG) induces systemic antitumor immunity.

Combination radiofrequency ablation and local injection of the immunostimulant bacillus Calmette-Guérin induces antitumor immunity in the lung and at a distant VX2 tumor in a rabbit model.

The clinical success of cell-based therapeutic angiogenesis has been limited in diabetic patients with critical limb ischemia. We previously reported that an injectable cell scaffold (ICS), which is a nano-scaled hydroxyapatite (HAp)-coated polymer microsphere, enhances therapeutic angiogenesis. Subsequently, we developed a modified ICS for clinical use, measuring 50 μm in diameter using poly(l-lactide-co-ε-caprolactone) as a biodegradable polymer, which achieved appropriately accelerated absorption in vivo. The aim of the present study was to evaluate the effectiveness of this practical ICS in diabetic hindlimb ischemia. Bone-marrow mononuclear cells (BMNCs) were intramuscularly injected, without or with a practical ICS, into the ischemic hindlimbs of mice (BMNCs or ICS+BMNCs group, respectively). Kaplan-Meier analysis demonstrated that the beneficial effects of BMNC transplantation for limb salvage after ischemic surgery were almost entirely abrogated in streptozotocin-induced diabetic mice. In contrast, injection of ICS+BMNCs revealed significant limb salvage in diabetic mice to a similar extent as in non-diabetic mice. The number of apoptotic transplanted BMNCs was 1.8-fold higher in diabetic mice 10 days after transplantation compared to non-diabetic mice, while that in the ICS+BMNCs group was markedly lower (8.3% of that in the BMNCs group) even in diabetic mice. The proangiogenic factors VEGF and FGF2, also known as antiapoptotic factors, mostly co-localized with transplanted GFP-positive BMNCs that were closely aggregated around the ICS in ischemic tissue. In conclusion, the practical ICS significantly augmented cell-based therapeutic angiogenesis even in diabetic animals, through local accumulation of proangiogenic factors and antiapoptotic effects in transplanted cells.

Injectable cell scaffold restores impaired cell-based therapeutic angiogenesis in diabetic mice with hindlimb ischemia.

Spontaneous Regression of Untreated Tumors with Immuno-Radiofrequency Ablation, RF Ablation in Combination with Local Injection of OK-432, in a Patient with Lung Metastases of Colon Cancer.

Radiofrequency ablation (RFA) is less effective for large tumors > 3 cm in diameter. Various studies of combination therapy using RFA and other treatments have been conducted to improve the results of RFA treatment of lung tumors, survival was extended in a tumor model when RFA was followed by concomitant use of systemic chemotherapy. Bevacizumab (BCM) is a one of molecular target drugs. Numerous clinical trials and reports have shown BCM's effect when used in combination with cisplatin (CDDP) in lung tumor. Our objective is to evaluate the survival of concurrent, combined use of radiofrequency ablation and BCM, and platinum-doublet chemotherapy [CDDP/paclitaxel (PTX)] in a rabbit VX2 lung tumor.

Combination therapy involving radiofrequency ablation and targeted chemotherapy with bevacizumab plus paclitaxel and cisplatin in a rabbit VX2 lung tumor model.

To identify the risk factors for local recurrence in hepatocellular carcinoma (HCC) patients treated with transcatheter arterial chemoembolization (TACE) with drug-eluting beads (DEB-TACE).

Risk factors for local recurrence of hepatocellular carcinoma after transcatheter arterial chemoembolization with drug-eluting beads (DEB-TACE).

Objective Balloon-occluded retrograde transvenous obliteration (B-RTO) for gastric varices (GV) is associated with drawbacks including a postoperative increase in portal pressure and the risk of subsequent worsening of esophageal varices (EV). Selective B-RTO that embolizes only the varices may have the potential to minimize such risks. The aim of this study is to retrospectively compare the postoperative course of patients after selective B-RTO (Group S) and conventional B-RTO (Group B). Methods One hundred four patients treated from January 2007 to April 2012 were classified into Groups S (n=5) and B (n=99). In the univariate analysis, the volume of 5% ethanolamine oleate iopamiodol (EOI) administered at baseline and the GV blood flow on endoscopic ultrasound after B-RTO were considered as covariates. The rates of GV recurrence and EV aggravation was also compared between Groups B and S. Results In Group S, the volume of 5% EOI was significantly lower (Group S vs. Group B: 14.6±5.5 vs. 28.5±16.4 mL; p=0.0012) and the rate of EV aggravation was lower in comparison to Group B (p=0.045). However, in Group S, the rate of complete eradication of GV blood flow was significantly lower (Group S vs. Group B: 0% vs. 89.9%; p<0.001) and the rate of re-treatment for GV was higher in comparison to Group B (Group S vs. Group B: 60% vs. 1.0%; p<0.001). Conclusion Selective B-RTO for GV could minimize the risk of a worsening of EV or reduce the amount of sclerosants; however, the rate of recurrence was high in comparison to conventional B-RTO.

Selective Balloon-occluded Retrograde Transvenous Obliteration for Gastric Varices.

Objective Therapeutic predictors derived from the venous pressure before therapy have not been identified for Budd-Chiari syndrome (BCS). The aim of this study was to determine whether or not measuring the distal pressure or pressure gradient was useful for predicting treatment efficacy in BCS. Methods We retrospectively analyzed seven consecutive patients diagnosed with symptomatic BCS at our hospital between 2008 and 2017. Distal and proximal venous pressures at occlusion sites of BCS were measured before treatment in all cases. The pressure gradient was defined as the difference between distal and proximal venous pressures. A receiver operating characteristics (ROC) analysis was performed for venous pressures. Results Percutaneous old balloon angioplasty (POBA) was performed in seven cases, with technical success achieved in all cases (100%). No complications were encountered. The median primary patency was 574 (interquartile range, 439.5-1,056.5) days. The 1-year primary patency rate was 71.73%. Six cases (85.7%) showed resolution of symptoms, representing clinical success. The ROC analysis revealed a high distal pressure (area under the ROC curve = 0.83, cut-off=12 mmHg) as a predictor of treatment efficacy of POBA for symptomatic BCS. In addition, the pressure gradient was considered significant from a clinical perspective, because the 6 successful cases with resolution of symptoms showed a large pressure gradient (range, 8-21 mmHg) before treatment, whereas the failed case showed a relatively small pressure gradient (7 mmHg). Conclusion High distal pressure and a large pressure gradient might predict the treatment efficacy of balloon angioplasty for symptomatic BCS.

Ken Kageyama

Department of Diagnostic and Interventional Radiology

Osaka City University Graduate School of Medicine

Generation of a Liver Orthotopic Human Uveal Melanoma Xenograft Platform in Immunodeficient Mice

Ken Kageyama

.css-o250i3{font-size:18px;font-family:Open Sans,sans-serif;line-height:21.6px;}Department of Diagnostic and Interventional Radiology

Osaka City University Graduate School of Medicine

Generation of a Liver Orthotopic Human Uveal Melanoma Xenograft Platform in Immunodeficient Mice

Department of Diagnostic and Interventional Radiology