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Ahmed H, Files M, Saarela K, Morray B, Shivaram G, Greene C, Choi C, Mauchley D, McMullan D, Bohuta L, Hong B, Albers E, Kemna M, Rubio A, Law Y, Reed R, Friedland-Little J, Pacheco M, Hsu E. Initial Experience with a Decision Tree to Assess the Need for Concurrent Liver Transplantat in Fontan Patients Undergoing Heart Transplant. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.1671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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Patel NA, Bonilla-Velez J, Rosenberg TL, Siegel D, Shivaram G, Chun RH, Waner M, O TM, Chen I, Moon R, Richter GT, Perkins JA. American society of pediatric otolaryngology vascular anomalies task force review of tongue venous malformations: Techniques, pearls, and pitfalls. Int J Pediatr Otorhinolaryngol 2023; 167:111497. [PMID: 36893584 DOI: 10.1016/j.ijporl.2023.111497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 02/20/2023] [Accepted: 02/25/2023] [Indexed: 03/11/2023]
Abstract
Management of tongue venous malformations can be challenging in the pediatric population due to their heterogeneity in presentation, extent of involvement and functional compromise. It is important to recognize the value of various treatment options in order to guide management of each patient in an individualized fashion. Here we describe a series of patients with tongue venous malformations that are managed using diverse modalities to illustrate the relative benefits and risks of each technique. The challenges of venous malformation treatment can be mitigated by tailoring the approach to each individual patient and malformation. This case series also emphasizes the need and importance of working in the setting of a multidisciplinary vascular anomalies team.
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Affiliation(s)
- Neha A Patel
- Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Department of Otolaryngology-Head and Neck Surgery, Hempstead, NY, USA; Cohen Children's Medical Center, Division of Pediatric Otolaryngology, New Hyde Park, NY, USA.
| | - Juliana Bonilla-Velez
- Seattle Children's Hospital, Division of Pediatric Otolaryngology-Head and Neck Surgery, Seattle, WA, USA; University of Washington, Department of Otolaryngology-Head and Neck Surgery, Seattle, WA, USA; Center for Clinical and Translational Research, Seattle Children's Research Institute, Seattle, WA, 98101, USA
| | - Tara L Rosenberg
- Baylor College of Medicine, Department of Otolaryngology-Head and Neck Surgery, Houston, TX, USA
| | - David Siegel
- Cohen Children's Medical Center, Division of Radiology, New Hyde Park, NY, USA
| | - Giri Shivaram
- Division of Interventional Radiology, Seattle Children's Hospital, Seattle, WA, USA
| | - Robert H Chun
- Medical College of Wisconsin, Department of Otolaryngology-Head and Neck Surgery, Milwaukee, WI, USA
| | - Milton Waner
- Vascular Birthmark Institute of New York, Department of Otolaryngology, Lenox Hill and Manhattan Eye, Ear, and Throat Hospitals, New York, NY, USA
| | - Teresa M O
- Vascular Birthmark Institute of New York, Department of Otolaryngology, Lenox Hill and Manhattan Eye, Ear, and Throat Hospitals, New York, NY, USA
| | - Itay Chen
- Vascular Birthmark Institute of New York, Department of Otolaryngology, Lenox Hill and Manhattan Eye, Ear, and Throat Hospitals, New York, NY, USA
| | - Rony Moon
- Vascular Birthmark Institute of New York, Department of Otolaryngology, Lenox Hill and Manhattan Eye, Ear, and Throat Hospitals, New York, NY, USA
| | - Gresham T Richter
- Department of Otolaryngology-Head and Neck Surgery, University of Arkansas for Medical Sciences, Arkansas Children's Hospital, Little Rock, AR, USA
| | - Jonathan A Perkins
- Seattle Children's Hospital, Division of Pediatric Otolaryngology-Head and Neck Surgery, Seattle, WA, USA; University of Washington, Department of Otolaryngology-Head and Neck Surgery, Seattle, WA, USA; Center for Clinical and Translational Research, Seattle Children's Research Institute, Seattle, WA, 98101, USA
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Kirk C, Tong M, Shivaram G, Law Y. Herding CATs? The Incidence and Prevention of Catheter-Associated Thromboses (CATs) in Pediatric Patients after Cardiac Transplant. J Heart Lung Transplant 2020. [DOI: 10.1016/j.healun.2020.01.311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Koo K, Gill A, McGuirk S, Monroe E, Reis J, Hawkins C, Shivaram G. 3:18 PM Abstract No. 158 Endovascular management of congenital arterioportal fistulas: a multicenter experience. J Vasc Interv Radiol 2020. [DOI: 10.1016/j.jvir.2019.12.193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Bertino F, Hawkins CM, Shivaram G, Gill AE, Lungren MP, Reposar A, Sze DY, Hwang GL, Koo K, Monroe E. Technical Feasibility and Clinical Effectiveness of Transjugular Intrahepatic Portosystemic Shunt Creation in Pediatric and Adolescent Patients. J Vasc Interv Radiol 2019; 30:178-186.e5. [PMID: 30717948 DOI: 10.1016/j.jvir.2018.10.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 09/28/2018] [Accepted: 10/06/2018] [Indexed: 12/24/2022] Open
Abstract
PURPOSE To examine the technical feasibility and clinical efficacy of transjugular intrahepatic portosystemic shunt (TIPS) creation in children and adolescents. MATERIALS AND METHODS Retrospective review was performed of 59 patients (mean age 12.6 y [range, 1.5-20 y], mean weight 47.5 kg [range, 11.4-112.2 kg], mean Model for End-stage Liver Disease/Pediatric End-stage Liver Disease score 12.5 [range, 6-33]) who underwent 61 TIPS attempts at 3 tertiary children's hospitals from 2001 to 2017 for acute esophageal or gastroesophageal variceal bleeding, primary and secondary prevention of variceal bleeding, and refractory ascites. Pediatric liver disease etiologies included biliary atresia, cystic fibrosis, and ductal plate anomalies. Technical, hemodynamic, and clinical success and patency rates were reported at 1, 6, 12, and 24 months. Statistical analysis evaluated reasons for clinical failure. Kaplan-Meier analysis measured clinical success, patency, and transplant-free survival. RESULTS Technical success was 93.4% (57/61) in 59 consecutive patients. Most common TIPS indications were treating and preventing esophageal and gastroesophageal variceal bleeding (57/59; 96.6%). Hemodynamic success was 94% (47/50). Clinical success was 80.7% (45/56). Two-year clinical success for acute variceal bleeding and ascites was 94.1% and 100%, respectively. Overall patency at 1, 6, 12, and 24 months was 98.0%, 97.8%, 94.3%, and 91.3%. Two-year transplant-free survival was 88.8%. Overall and major complication rates were 21.2% (13/61) and 8.2% (5/61), with 3 mortalities. Gradient reduction < 12 mm Hg correlated with clinical success (P < .01). CONCLUSIONS TIPS creation in pediatric patients is technically feasible and clinically efficacious for treatment and prevention of esophageal and gastroesophageal variceal hemorrhage. High 2-year clinical success, patency, and survival rates should encourage providers to consider portosystemic shunts as a bridge to liver transplantation.
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Affiliation(s)
- Frederic Bertino
- Divisions of Pediatric Radiology and Interventional Radiology and Image Guided Medicine, Department of Radiology and Imaging Sciences, Emory University School of Medicine, Atlanta, Georgia; Children's Healthcare of Atlanta, Atlanta, Georgia.
| | - C Matthew Hawkins
- Divisions of Pediatric Radiology and Interventional Radiology and Image Guided Medicine, Department of Radiology and Imaging Sciences, Emory University School of Medicine, Atlanta, Georgia; Children's Healthcare of Atlanta, Atlanta, Georgia
| | - Giri Shivaram
- Division of Interventional Radiology, Department of Radiology, University of Washington, Seattle, Washington; Seattle Children's Hospital, Seattle, Washington
| | - Anne E Gill
- Divisions of Pediatric Radiology and Interventional Radiology and Image Guided Medicine, Department of Radiology and Imaging Sciences, Emory University School of Medicine, Atlanta, Georgia; Children's Healthcare of Atlanta, Atlanta, Georgia
| | - Matthew P Lungren
- Department of Radiology, Stanford University School of Medicine, Stanford, California
| | - Aaron Reposar
- Department of Radiology, Stanford University School of Medicine, Stanford, California
| | - Daniel Y Sze
- Department of Radiology, Stanford University School of Medicine, Stanford, California
| | - Gloria L Hwang
- Department of Radiology, Stanford University School of Medicine, Stanford, California
| | - Kevin Koo
- Division of Interventional Radiology, Department of Radiology, University of Washington, Seattle, Washington; Seattle Children's Hospital, Seattle, Washington
| | - Eric Monroe
- Division of Interventional Radiology, Department of Radiology, University of Washington, Seattle, Washington; Seattle Children's Hospital, Seattle, Washington
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Monroe EJ, Jeyakumar A, Ingraham CR, Shivaram G, Koo KSH, Hsu EK, Dick AAS. Doppler ultrasound predictors of transplant hepatic venous outflow obstruction in pediatric patients. Pediatr Transplant 2018; 22:e13310. [PMID: 30338622 DOI: 10.1111/petr.13310] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 08/25/2018] [Accepted: 09/03/2018] [Indexed: 01/10/2023]
Abstract
OBJECTIVE To investigate Doppler US and catheter venogram correlates to improve detection of transplant HVOO and avoid unnecessary invasive imaging procedures. MATERIALS AND METHODS A retrospective review was performed in all pediatric OLT patients undergoing catheter venography of the hepatic veins between 2007 and 2017 at a single large tertiary pediatric liver transplant institution. RESULTS Forty-four transplant hepatic venograms in 32 OLT patients were included (mean 1.38, range 1-4 venograms per patient). All venograms were preceded by an independent Doppler US examination. Twenty-one (47.7%) venograms were performed for the investigation of suspected HVOO based on Doppler US alone, 19 (43.2%) were performed for TJLB without suspected HVOO, 4 (9.1%) were performed for both. Sixteen (36.3%) instances of >50% anastomotic stenosis were identified. Mean peak anastomotic velocities were 208 cm/s and 116 cm/s in the presence and absence of a >50% venographic stenosis, respectively (P < 0.004). In all cases where there was a monophasic waveform seen on Doppler US, there was a > 50% stenosis seen on hepatic vein venogram. In all cases where a triphasic waveform was seen on Doppler US, there was no stenosis seen on hepatic vein venogram. CONCLUSION While a Doppler US velocity threshold providing both high sensitivity and specificity has yet to be identified, increasing peak anastomotic velocity and decreasing intrahepatic venous velocity correlate strongly with venographic outflow stenosis. The presence of a triphasic intrahepatic waveform provides good NPV.
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Affiliation(s)
- Eric J Monroe
- Interventional Radiology, Seattle Children's Hospital and University of Washington, Seattle, Washington
| | - Arthie Jeyakumar
- Interventional Radiology, Seattle Children's Hospital and University of Washington, Seattle, Washington
| | - Christopher R Ingraham
- Interventional Radiology, Seattle Children's Hospital and University of Washington, Seattle, Washington
| | - Giri Shivaram
- Interventional Radiology, Seattle Children's Hospital and University of Washington, Seattle, Washington
| | - Kevin S H Koo
- Interventional Radiology, Seattle Children's Hospital and University of Washington, Seattle, Washington
| | - Evelyn K Hsu
- Gastroenterology and Hepatology, Seattle Children's Hospital and University of Washington, Seattle, Washington
| | - Andre A S Dick
- Pediatric Transplantation, Seattle Children's Hospital and University of Washington, Seattle, Washington
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Woerner A, Shivaram G, Koo KSH, Hsu EK, Dick AAS, Monroe EJ. Clinical and Imaging Predictors of Surgical Splenorenal Shunt Dysfunction in Pediatric Patients. J Pediatr Gastroenterol Nutr 2018; 66:e139-e145. [PMID: 29470285 DOI: 10.1097/mpg.0000000000001931] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
PURPOSE Few established criteria exist to prompt angiographic evaluation and intervention for surgically created splenorenal shunts (SRS). Clinical and Doppler ultrasound (DUS) imaging predictors of shunt dysfunction were evaluated in this retrospective study. MATERIALS AND METHODS Consecutive patients undergoing SRS angiography over a 10-year period were retrospectively identified. Preangiography platelet count and DUS measurements of spleen diameter, maximum splenic vein velocity, and maximum shunt velocity were assessed and compared to findings at subsequent catheter angiography. RESULTS Twenty-six SRS angiograms were performed in 16 patients. Two of the 26 procedures were excluded from analysis due to insufficient baseline preangiography clinical and DUS data. In the remaining 24 cases, significant stenosis/occlusion was confirmed at angiography in 20, whereas wide patency was seen in 4. For the 20 cases of angiographically confirmed significant stenosis/occlusion, when compared to baseline post-SRS creation to immediate preangiography evaluation there was a greater decrease in platelet count (-51.8% vs -19.4%), a greater increase in spleen diameter (+13.4% vs +3.7%), a greater increase in maximum shunt velocity (+74.7% vs +59.7%), and a greater decrease in splenic vein velocity (-25.0% vs -18.5%). CONCLUSION Clinical evidence of splenic sequestration and DUS finding of increased maximum shunt velocity correlate with angiographic findings of SRS dysfunction and could be used to help predict the need for shunt intervention.
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Affiliation(s)
| | | | | | | | - Andre A S Dick
- Department of Pediatric Transplantation, Seattle Children's Hospital and University of Washington, Seattle, WA
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Pierce DB, Shivaram G, Koo KSH, Shaw DWW, Meyer KF, Monroe EJ. Ultrasound-guided lumbar puncture in pediatric patients: technical success and safety. Pediatr Radiol 2018; 48:875-881. [PMID: 29397406 DOI: 10.1007/s00247-018-4091-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 12/31/2017] [Accepted: 01/19/2018] [Indexed: 12/11/2022]
Abstract
BACKGROUND Disadvantages of fluoroscopically guided lumbar puncture include delivery of ionizing radiation and limited resolution of incompletely ossified posterior elements. Ultrasound (US) allows visualization of critical soft tissues and the cerebrospinal fluid (CSF) space without ionizing radiation. OBJECTIVE To determine the technical success and safety of US-guided lumbar puncture in pediatric patients. MATERIALS AND METHODS A retrospective review identified all patients referred to interventional radiology for lumbar puncture between June 2010 and June 2017. Patients who underwent lumbar puncture with fluoroscopic guidance alone were excluded. For the remaining procedures, technical success and procedural complications were assessed. Two hundred and one image-guided lumbar punctures in 161 patients were included. Eighty patients (43%) had previously failed landmark-based attempts. RESULTS One hundred ninety-six (97.5%) patients underwent lumbar puncture. Five procedures (2.5%) were not attempted after US assessment, either due to a paucity of CSF or unsafe window for needle placement. Technical success was achieved in 187 (95.4%) of lumbar punctures attempted with US guidance. One hundred seventy-seven (90.3%) were technically successful with US alone (age range: 2 days-15 years, weight range: 1.9-53.1 kg) and an additional 10 (5.1%) were successful with US-guided thecal access and subsequent fluoroscopic confirmation. Three (1.5%) cases were unsuccessful with US guidance but were subsequently successful with fluoroscopic guidance. Of the 80 previously failed landmark-based lumbar punctures, 77 (96.3%) were successful with US guidance alone. There were no reported complications. CONCLUSION US guidance is safe and effective for lumbar punctures and has specific advantages over fluoroscopy in pediatric patients.
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Affiliation(s)
- David B Pierce
- Department of Radiology, Section of Interventional Radiology, Seattle Children's Hospital, University of Washington, 4800 Sand Point Way NE, M/S R-5417, Seattle, WA, 98105, USA
| | - Giri Shivaram
- Department of Radiology, Section of Interventional Radiology, Seattle Children's Hospital, University of Washington, 4800 Sand Point Way NE, M/S R-5417, Seattle, WA, 98105, USA
| | - Kevin S H Koo
- Department of Radiology, Section of Interventional Radiology, Seattle Children's Hospital, University of Washington, 4800 Sand Point Way NE, M/S R-5417, Seattle, WA, 98105, USA
| | - Dennis W W Shaw
- Department of Radiology, Section of Interventional Radiology, Seattle Children's Hospital, University of Washington, 4800 Sand Point Way NE, M/S R-5417, Seattle, WA, 98105, USA
| | - Kirby F Meyer
- Department of Radiology, Section of Interventional Radiology, Seattle Children's Hospital, University of Washington, 4800 Sand Point Way NE, M/S R-5417, Seattle, WA, 98105, USA
| | - Eric J Monroe
- Department of Radiology, Section of Interventional Radiology, Seattle Children's Hospital, University of Washington, 4800 Sand Point Way NE, M/S R-5417, Seattle, WA, 98105, USA.
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Abstract
AbstractPercutaneous sclerotherapy and standalone surgical excision have historically been the mainstay of treatment for pediatric venous malformations (VMs). However, both approaches have significant limitations. Sclerotherapy often requires multiple treatment sessions, with each round adding additional procedural and anesthetic risks as well as radiation exposure. Standalone surgical excision of VMs can be complicated by high-volume blood loss, and indistinct lesion margins can lead to incomplete resection, resulting in recurrence. An alternative to these approaches is percutaneous cyanoacrylate glue embolization followed by immediate surgical excision, a single-stage procedure that allows for better surgical margin definition and reduced intraoperative blood loss, potentially leading to more definitive treatment. The authors describe the interventional radiology aspects of this combined procedure, emphasizing materials preparation and embolization technique.
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Affiliation(s)
- Eric Monroe
- Section of Interventional Radiology, Department of Radiology, Seattle Children's Hospital and University of Washington, Seattle, Washington, United States
| | - Rush Chewning
- Division of Vascular and Interventional Radiology, Boston Children's Hospital, Boston, Massachusetts, United States
| | - Kevin Koo
- Section of Interventional Radiology, Department of Radiology, Seattle Children's Hospital and University of Washington, Seattle, Washington, United States
| | - Giri Shivaram
- Section of Interventional Radiology, Department of Radiology, Seattle Children's Hospital and University of Washington, Seattle, Washington, United States
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Pierce D, Shivaram G, Koo K, Shaw D, Meyer K, Monroe E. Abstract No. 596 Ultrasound-guided lumbar puncture in pediatric patients: technical success and safety. J Vasc Interv Radiol 2018. [DOI: 10.1016/j.jvir.2018.01.641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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Smith J, Monroe E, Shivaram G, Shaw D, Koo K. 3:45 PM Abstract No. 116 An update of one institution’s experience with the use of arterial closure devices following femoral arterial puncture in children. J Vasc Interv Radiol 2018. [DOI: 10.1016/j.jvir.2018.01.132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Shivaram G, Monroe E, Koo K, Gill A, Hawkins C. 3:09 PM Abstract No. 112 C-arm cone-beam computed tomography navigational overlay pediatric lung nodule biopsy: safety and technical success. J Vasc Interv Radiol 2018. [DOI: 10.1016/j.jvir.2018.01.128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Jin Y, Gao J, Weng Q, Xiong F, Gu S, Shivaram G, Zhang F, Yang X. Cholangiocarcinoma: molecular imaging-guided radiofrequency hyperthermia-enhanced intratumoral herpes simplex virus thymidine kinase gene therapy. Am J Cancer Res 2018; 8:502-513. [PMID: 29637004 PMCID: PMC5883099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Accepted: 10/19/2017] [Indexed: 06/08/2023] Open
Abstract
We investigated the feasibility of using radiofrequency hyperthermia (RFH) to enhance green fluorescent protein (GFP)/herpes simplex virus thymidine kinase (HSV-TK)/ganciclovir (GCV) gene therapy of cholangiocarcinoma. Cholangiocarcinoma cells and mice with cholangiocarcinoma were treated by (i) GFP/HSV-TK/plasmid combined with RFH at 42°C, followed by ganciclovir administration; (ii) HSV-TK alone; (iii) RFH alone; and (iv) saline. The therapeutic effects among different treatments were evaluated by bioluminescent optical imaging and ultrasound imaging. For the technical validation, GFP/HSV-TK/plasmid was intrabiliarily injected into pig common bile duct (CBD) walls using a needle-integrated balloon catheter with or without RFH enhancement. GFP gene expression was evaluated by optical imaging, which was correlated with histology. The results show that combination therapy of HSV-TK plus RFH significantly induced lower cell viabilities and decreased bioluminescence signals compared the other three groups, which were further confirmed by the tumor volume decrease with combination therapy, as measured by ultrasound imaging. Optical imaging of CBD tissues demonstrated an increased GFP expression in the group with RFH enhancement, compared that with non-RFH treatment. We concluded that intratumoral RFH can enhance the therapeutic effect of GFP/HSV-TK/plasmid on cholangiocarcinoma, which may open new avenues for effective treatment of this deadly disease.
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Affiliation(s)
- Yin Jin
- Department of Radiology, Sir Run Run Shaw Hospital, Zhejiang University School of MedicineHangzhou, Zhejiang, China
- Image-Guided Bio-Molecular Intervention Research, Department of Radiology, University of Washington School of MedicineSeattle, Washington, USA
| | - Jun Gao
- Image-Guided Bio-Molecular Intervention Research, Department of Radiology, University of Washington School of MedicineSeattle, Washington, USA
| | - Qiaoyou Weng
- Image-Guided Bio-Molecular Intervention Research, Department of Radiology, University of Washington School of MedicineSeattle, Washington, USA
| | - Fu Xiong
- Image-Guided Bio-Molecular Intervention Research, Department of Radiology, University of Washington School of MedicineSeattle, Washington, USA
| | - Shannon Gu
- Image-Guided Bio-Molecular Intervention Research, Department of Radiology, University of Washington School of MedicineSeattle, Washington, USA
| | - Giri Shivaram
- Image-Guided Bio-Molecular Intervention Research, Department of Radiology, University of Washington School of MedicineSeattle, Washington, USA
| | - Feng Zhang
- Image-Guided Bio-Molecular Intervention Research, Department of Radiology, University of Washington School of MedicineSeattle, Washington, USA
| | - Xiaoming Yang
- Department of Radiology, Sir Run Run Shaw Hospital, Zhejiang University School of MedicineHangzhou, Zhejiang, China
- Image-Guided Bio-Molecular Intervention Research, Department of Radiology, University of Washington School of MedicineSeattle, Washington, USA
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Chewning R, Lindberg A, Monroe E, Vaidya S, Shivaram G. Glue embolization of pediatric non-head and neck venous malformations. J Vasc Interv Radiol 2016. [DOI: 10.1016/j.jvir.2015.12.490] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Verraich J, Shivaram G, Ghodke B, Vaidya S, Zopf D, Perkins J. Pre-operative n-butyl-2-cyanoacrylate glue embolization of pediatric head and neck venous malformations: technique and clinical outcomes. J Vasc Interv Radiol 2015. [DOI: 10.1016/j.jvir.2014.12.120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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16
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Padia SA, Shivaram G, Bastawrous S, Bhargava P, Vo NJ, Vaidya S, Valji K, Harris WP, Hippe DS, Kogut MJ. Safety and Efficacy of Drug-eluting Bead Chemoembolization for Hepatocellular Carcinoma: Comparison of Small-versus Medium-size Particles. J Vasc Interv Radiol 2013; 24:301-6. [DOI: 10.1016/j.jvir.2012.11.023] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2012] [Revised: 11/22/2012] [Accepted: 11/26/2012] [Indexed: 12/13/2022] Open
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Pugliese M, Shivaram G, Rogers J, Haseley D, Buchanan C. PET-CT Imaging in the Initial Management of High-Risk Breast Cancer Patients: Who Did it Help? Breast J 2009; 15:554-6. [DOI: 10.1111/j.1524-4741.2009.00784.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Malone AMD, Batra NN, Shivaram G, Kwon RY, You L, Kim CH, Rodriguez J, Jair K, Jacobs CR. The role of actin cytoskeleton in oscillatory fluid flow-induced signaling in MC3T3-E1 osteoblasts. Am J Physiol Cell Physiol 2007; 292:C1830-6. [PMID: 17251324 PMCID: PMC3057612 DOI: 10.1152/ajpcell.00352.2005] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Fluid flow due to loading in bone is a potent mechanical signal that may play an important role in bone adaptation to its mechanical environment. Previous in vitro studies of osteoblastic cells revealed that the upregulation of cyclooxygenase-2 (COX-2) and c-fos induced by steady fluid flow depends on a change in actin polymerization dynamics and the formation of actin stress fibers. Exposing cells to dynamic oscillatory fluid flow, the temporal flow pattern that results from normal physical activity, is also known to result in increased COX-2 expression and PGE(2) release. The purpose of this study was to determine whether dynamic fluid flow results in changes in actin dynamics similar to steady flow and to determine whether alterations in actin dynamics are required for PGE(2) release. We found that exposure to oscillatory fluid flow did not result in the development of F-actin stress fibers in MC3T3-E1 osteoblastic cells and that inhibition of actin polymerization with cytochalasin D did not inhibit intracellular calcium mobilization or PGE(2) release. In fact, PGE(2) release was increased threefold in the polymerization inhibited cells and this PGE(2) release was dependent on calcium release from the endoplasmic reticulum. This was in contrast to the PGE(2) release that occurs in normal cells, which is independent of calcium flux from endoplasmic reticulum stores. We suggest that this increased PGE(2) release involves a different molecular mechanism perhaps involving increased deformation due to the compromised cytoskeleton.
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Affiliation(s)
- Amanda M D Malone
- Bone and Joint Rehabilitation R and D Center, Veterans Affairs Medical Center, Palo Alto, CA, USA
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