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Wu Q, Lv J, Xie F, Li S. Quantification of oxaliplatin- and ioversol-related compounds in pharmaceutical formulations using novel HPLC-ICP-MS methods. J Pharm Biomed Anal 2024; 242:116026. [PMID: 38367519 DOI: 10.1016/j.jpba.2024.116026] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 02/04/2024] [Accepted: 02/08/2024] [Indexed: 02/19/2024]
Abstract
PURPOSE Accurate quantifying of drug-related compounds in medicines is vital for safety. Commonly used structure-dependent methods rely on analytical standards. High-performance liquid chromatography coupled with inductively coupled plasma-mass spectrometry (HPLC-ICP-MS) offers a promising solution, being structure-independent and not requiring standards. In this study, we aim to develop HPLC-ICP-MS methods for the determination of related compounds in oxaliplatin and ioversol injections. RESULTS The target analytes were eluted on an XSelect HSS T3 column (2.1 ×50 mm, 5 µm). Specifically, oxaliplatin injection was eluted isocracially for 3.5 min, and ioversol injection was eluted gradient with a total chromatographic run time of 12 min. The measurements to determine dihydroxy oxaliplatin-Pt(IV) and two related compounds of ioversol were performed by monitoring at m/z for 195Pt and 127I, respectively. The calibration curves were established over the range of 0.05-1 μM for Pt and 0.3-15 μM for I with the correlation coefficients greater than 0.999. The limits of quantification were 0.004 μM for dihydroxy oxaliplatin-Pt(IV), 0.022 μM for ioversol related compound A and 0.026 μM for ioversol related compound B. The accuracy (recovery between 93-105%) and precision (repeatability ≤ 6.1% RSD) were fit-for-purpose for dihydroxy oxaliplatin-Pt(IV), and the accuracy (recovery between 95-107%) and precision (repeatability ≤ 3.9% RSD) were also fit-for-purpose for both ioversol related compound A and ioversol related compound B. CONCLUSION The quantitation accuracy of HPLC-ICP-MS closely matched that of the standard HPLC-UV approach. HPLC-ICP-MS can be used as a complementary analytical technique for quantitative determination of drug-related compounds.
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Affiliation(s)
- Qiping Wu
- Division of Biopharmaceutics and Pharmacokinetics, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha 410013, China
| | - Jianmei Lv
- Division of Biopharmaceutics and Pharmacokinetics, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha 410013, China
| | - Feifan Xie
- Division of Biopharmaceutics and Pharmacokinetics, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha 410013, China
| | - Sanwang Li
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha 410011, China; Institute of Clinical Pharmacy, Central South University, Changsha 410011, China.
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Yang Z, Luo W, Yang Z, Zhang M, Dong M, Guo D, Gu J, Sun C, Xiao S. Diterpenoids from Torreya grandis and their cytotoxic activities. Phytochemistry 2024; 221:114036. [PMID: 38387724 DOI: 10.1016/j.phytochem.2024.114036] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Revised: 02/18/2024] [Accepted: 02/19/2024] [Indexed: 02/24/2024]
Abstract
Eight previously undescribed diterpenoids, along with eleven previously reported analogues, were obtained from the supercritical CO2 extracts of Torreya grandis aril. The structures of these compounds were elucidated based on HRESIMS, NMR, ECD, and single-crystal X-ray diffraction data. In the MTT assay, compound 18 exhibited significant inhibitory effects on two human colon cancer cell lines, HT-29 and HCT 116 cells, with IC50 values of 7.37 μM and 6.55 μM, respectively. It was found that compound 18 induced apoptosis and significantly inhibited the migration of HCT 116 colon cancer cells in a concentration-dependent manner.
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Affiliation(s)
- Zongyu Yang
- Key Laboratory of Basic Pharmacology of Guizhou Province and School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, 563000, China; SiChuan Vocational College of Health and Rehabilitation, Zigong, Sichuan, 643000, China
| | - Wanli Luo
- Key Laboratory of Basic Pharmacology of Guizhou Province and School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, 563000, China
| | - Zaiwen Yang
- Guizhou Huiteng Extraction Technology Application Research Institute Co., Ltd. Zunyi, Guizhou, 563000, China
| | - Maosheng Zhang
- Key Laboratory of Basic Pharmacology of Guizhou Province and School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, 563000, China; Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, 563000, China
| | - Minjian Dong
- Key Laboratory of Basic Pharmacology of Guizhou Province and School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, 563000, China; Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, 563000, China
| | - Dale Guo
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of, Traditional Chinese Medicine, Chengdu, Sichuan, 611137, China
| | - Juan Gu
- Department of Pharmacy, Affiliated Hospital of Zunyi Medical University, Guizhou, 563003, China
| | - Chengxin Sun
- Key Laboratory of Basic Pharmacology of Guizhou Province and School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, 563000, China; Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, 563000, China.
| | - Shiji Xiao
- Key Laboratory of Basic Pharmacology of Guizhou Province and School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, 563000, China; Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, 563000, China.
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Magnusson MMM, Gerk U, Schüpbach G, Rieger J, Plendl J, Marin I, Drews B, Kaessmeyer S. Microvascular changes following exposure to iodinated contrast media in vitro. A qualitative comparison to serum creatinine concentrations in post-cardiac catheterization patients. Microvasc Res 2024; 153:104659. [PMID: 38286222 DOI: 10.1016/j.mvr.2024.104659] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 01/23/2024] [Accepted: 01/23/2024] [Indexed: 01/31/2024]
Abstract
INTRODUCTION Contrast-associated acute kidney injury (CA-AKI) is characterized as a loss of renal function following radiological contrast media administration. While all contrast media induce variable changes in microvascular endothelial cells in vitro, only few studies report clinical significance of their findings. A comprehensive assessment of the effect of iodinated contrast media on the renal function in vitro and in vivo is essential. The aim of our study was to morphometrically quantify the effect of two different contrast media (Iobitridol and Iodixanol) on vascular endothelial capillaries in vitro and to analyze their effect on the renal function of patients who underwent cardiac catheterization including the intra-arterial administration of contrast media, by measuring serum creatinine concentration (SCr), a byproduct of muscle metabolism, primarily excreted by the kidneys. Our hypothesis suggests that conducting a qualitative comparison of both outcomes will enable identification of differences and similarities between in vitro and in vivo exposure. MATERIAL AND METHODS In vitro, co-cultures of human dermal fibroblasts and human dermal microvascular endothelial cells forming capillary beds were exposed to a mixture of phosphate buffered saline and either Iobitridol, Iodixanol, or one of their supplements EDTA or Trometamol for 1.5 or 5 min. Negative control co-cultures were exposed exclusively to phosphate buffered saline. Co-cultures were either directly fixed or underwent a regeneration time of 1, 3 or 7 days. An artificial intelligence software was trained for detection of labeled endothelial capillaries (CD31) on light microscope images and measurements of morphometric parameters. In vivo, we retrospectively analyzed data from patients who underwent intra-arterial administration of contrast media and for whom SCr values were available pre- and post-contrast exposition (1, 3, and 7 days following procedure). Temporal development of SCr and incidence of CA-AKI were assessed. Both exposure types were qualitatively compared. RESULTS In vitro, Iobitridol, Iodixanol and EDTA induced a strong decrease of two morphometric parameters after 3 days of regeneration. In vivo, a significant increase of SCr and incidence of CA-AKI was observed 3 days following procedure in the post-contrast media patients. No difference was observed between groups. DISCUSSION Two of the morphometric parameters were inversely proportional to the SCr of the patients. If the endothelial damages observed in vitro occur in vivo, it may result in renal hypoxia, inducing a loss of kidney function clinically translated into an increase of SCr. Further development of our in vitro model could allow closer replication of the internal structure of a kidney and bridge the gap between in vitro studies and their clinical findings.
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Affiliation(s)
- Marine M M Magnusson
- Division of Veterinary Anatomy, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Ulrich Gerk
- Städtisches Klinikum Dresden, Dresden, Germany
| | - Gertraud Schüpbach
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Juliane Rieger
- Institute of Translational Medicine for Health Care Systems, Department of Human Medicine, Faculty of Medicine, MSB Medical School Berlin, Berlin, Germany
| | - Johanna Plendl
- Institute of Veterinary Anatomy, Department of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - Ilka Marin
- Institute of Veterinary Anatomy, Department of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - Barbara Drews
- Division of Veterinary Anatomy, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Sabine Kaessmeyer
- Division of Veterinary Anatomy, Vetsuisse Faculty, University of Bern, Bern, Switzerland.
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Alsved J, Rezayati Charan M, Ohlsson P, Urbansky A, Augustsson P. Label-free separation of peripheral blood mononuclear cells from whole blood by gradient acoustic focusing. Sci Rep 2024; 14:8748. [PMID: 38627566 PMCID: PMC11021555 DOI: 10.1038/s41598-024-59156-7] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Accepted: 04/08/2024] [Indexed: 04/19/2024] Open
Abstract
Efficient techniques for separating target cells from undiluted blood are necessary for various diagnostic and research applications. This paper presents acoustic focusing in dense media containing iodixanol to purify peripheral blood mononuclear cells (PBMCs) from whole blood in a label-free and flow-through format. If the blood is laminated or mixed with iodixanol solutions while passing through the resonant microchannel, all the components (fluids and cells) rearrange according to their acoustic impedances. Red blood cells (RBCs) have higher effective acoustic impedance than PBMCs. Therefore, they relocate to the pressure node despite the dense medium, while PBMCs stay near the channel walls due to their negative contrast factor relative to their surrounding medium. By modifying the medium and thus tuning the contrast factor of the cells, we enriched PBMCs relative to RBCs by a factor of 3600 to 11,000 and with a separation efficiency of 85%. That level of RBC depletion is higher than most other microfluidic methods and similar to that of density gradient centrifugation. The current acoustophoretic chip runs up to 20 µl/min undiluted whole blood and can be integrated with downstream analysis.
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Affiliation(s)
- Julia Alsved
- AcouSort AB, Medicon Village, S-223 81, Lund, Sweden
| | - Mahdi Rezayati Charan
- Department of Biomedical Engineering, Lund University, Ole Römers väg 3, 22363, Lund, Sweden
| | - Pelle Ohlsson
- AcouSort AB, Medicon Village, S-223 81, Lund, Sweden
- Department of Biomedical Engineering, Lund University, Ole Römers väg 3, 22363, Lund, Sweden
| | - Anke Urbansky
- AcouSort AB, Medicon Village, S-223 81, Lund, Sweden
| | - Per Augustsson
- Department of Biomedical Engineering, Lund University, Ole Römers väg 3, 22363, Lund, Sweden.
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Kandhol N, Srivastava A, Rai P, Sharma S, Pandey S, Singh VP, Tripathi DK. Cytokinin and indole-3-acetic acid crosstalk is indispensable for silicon mediated chromium stress tolerance in roots of wheat seedlings. J Hazard Mater 2024; 468:133134. [PMID: 38387171 DOI: 10.1016/j.jhazmat.2023.133134] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 10/31/2023] [Accepted: 11/28/2023] [Indexed: 02/24/2024]
Abstract
The rising heavy metal contamination of soils imposes toxic impacts on plants as well as other life forms. One such highly toxic and carcinogenic heavy metal is hexavalent chromium [Cr(VI)] that has been reported to prominently retard the plant growth. The present study investigated the potential of silicon (Si, 10 µM) to alleviate the toxicity of Cr(VI) (25 µM) on roots of wheat (Triticum aestivum L.) seedlings. Application of Si to Cr(VI)-stressed wheat seedlings improved their overall growth parameters. This study also reveals the involvement of two phytohormones, namely auxin and cytokinin and their crosstalk in Si-mediated mitigation of the toxic impacts of Cr(VI) in wheat seedlings. The application of cytokinin alone to wheat seedlings under Cr(VI) stress reduced the intensity of toxic effects of Cr(VI). In combination with Si, cytokinin application to Cr(VI)-stressed wheat seedlings significantly minimized the decrease induced by Cr(VI) in different parameters such as root-shoot length (10.8% and 13%, respectively), root-shoot fresh mass (11.3% and 10.1%, respectively), and total chlorophyll and carotenoids content (13.4% and 6.8%, respectively) with respect to the control. This treatment also maintained the regulation of proline metabolism (proline content, and P5CS and PDH activities), ascorbate-glutathione (AsA-GSH) cycle and nutrient homeostasis. The protective effect of Si and cytokinin against Cr(VI) stress was minimized upon supplementation of an inhibitor of polar auxin transport- 2,3,5-triiodobenzoic acid (TIBA) which suggested a potential involvement of auxin in Si and cytokinin-mediated mitigation of Cr(VI) toxicity. The exogenous addition of a natural auxin - indole-3-acetic acid (IAA) confirmed auxin is an active member of a signaling cascade along with cytokinin that aids in Si-mediated Cr(VI) toxicity alleviation as IAA application reversed the negative impacts of TIBA on wheat roots treated with Cr(VI), cytokinin and Si. The results of this research are also confirmed by the gene expression analysis conducted for nutrient transporters (Lsi1, CCaMK, MHX, SULT1 and ZIP1) and enzymes involved in the AsA-GSH cycle (APX, GR, DHAR and MDHAR). The overall results of this research indicate towards possible induction of a crosstalk between cytokinin and IAA upon Si supplementation which in turn stimulates physiological, biochemical and molecular changes to exhibit protective effects against Cr(VI) stress. Further, the information obtained suggests probable employment of Si, cytokinin and IAA alone or combined in agriculture to maintain plant productivity under Cr(VI) stress and data regarding expression of key genes can be used to develop new crop varieties with enhanced resistance against Cr(VI) stress together with its reduced load in seedlings.
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Affiliation(s)
- Nidhi Kandhol
- Crop Nanobiology and Molecular Stress Physiology Lab, Amity Institute of Organic Agriculture, Amity University Uttar Pradesh, Sector-125, Noida 201313, India
| | - Aakriti Srivastava
- Crop Nanobiology and Molecular Stress Physiology Lab, Amity Institute of Organic Agriculture, Amity University Uttar Pradesh, Sector-125, Noida 201313, India
| | - Padmaja Rai
- Department of Biotechnology, Motilal Nehru National Institute of Technology, Allahabad, Prayagraj, India
| | - Shivesh Sharma
- Department of Biotechnology, Motilal Nehru National Institute of Technology, Allahabad, Prayagraj, India
| | - Sangeeta Pandey
- Plant Microbe Interaction Lab, Amity Institute of Organic Agriculture, Amity University Uttar Pradesh, Sector-125, Noida 201313, India
| | - Vijay Pratap Singh
- Plant Physiology Laboratory, Department of Botany, C.M.P. Degree College, University of Allahabad, Prayagraj 211002, India
| | - Durgesh Kumar Tripathi
- Crop Nanobiology and Molecular Stress Physiology Lab, Amity Institute of Organic Agriculture, Amity University Uttar Pradesh, Sector-125, Noida 201313, India.
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Zuo Z, Li Q, Zhou S, Yu R, Wu C, Chen J, Xiao Y, Chen H, Song J, Pan Y, Wang W. Berberine ameliorates contrast-induced acute kidney injury by regulating HDAC4-FoxO3a axis-induced autophagy: In vivo and in vitro. Phytother Res 2024; 38:1761-1780. [PMID: 37922559 DOI: 10.1002/ptr.8059] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Revised: 09/30/2023] [Accepted: 10/15/2023] [Indexed: 11/07/2023]
Abstract
In hospitals, contrast-induced acute kidney injury (CI-AKI) is a major cause of renal failure. This study evaluates berberine's (BBR) renal protection and its potential HDAC4 mechanism. CI-AKI in rats was induced with 10 mL kg-1 ioversol. Rats were divided into five groups: Ctrl, BBR, CI-AKI, CI-AKI + BBR, and CI-AKI + Tasq. The renal function of CI-AKI rats was determined by measuring serum creatinine and blood urea nitrogen. Histopathological changes and apoptosis of renal tubular epithelial cells were observed by HE and terminal deoxynucleotidyl transferase (TdTase)-mediated dUTP-biotin nick end labeling (TUNEL) staining. Transmission electron microscopy was used to observe autophagic structures. In vitro, a CI-AKI cell model was created with ioversol-treated HK-2 cells. Treatments included BBR, Rapa, HCQ, and Tasq. Analyses focused on proteins and genes associated with kidney injury, apoptosis, autophagy, and the HDAC4-FoxO3a axis. BBR showed significant protective effects against CI-AKI both in vivo and in vitro. It inhibited apoptosis by increasing Bcl-2 protein levels and decreasing Bax levels. BBR also activated autophagy, as indicated by changes in autophagy-related proteins and autophagic flux. The study further revealed that the contrast agent ioversol increased the expression of HDAC4, which led to elevated levels of phosphorylated FoxO3a (p-FoxO3a) and acetylated FoxO3a (Ac-FoxO3a). However, BBR inhibited HDAC4 expression, resulting in decreased levels of p-FoxO3a and Ac-FoxO3a. This activation of autophagy-related genes, regulated by the transcription factor FoxO3a, played a role in BBR's protective effects. BBR, a traditional Chinese medicine, shows promise against CI-AKI. It may counteract CI-AKI by modulating HDAC4 and FoxO3a, enhancing autophagy, and limiting apoptosis.
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Affiliation(s)
- Zhi Zuo
- Department of Cardiology, The First Affiliated Hospital with Nanjing Medical University/Jiangsu Province Hospital, Nanjing, China
| | - Qingju Li
- Lianshui People's Hospital, Affiliated Kangda College of Nanjing Medical University, Huai'an, China
- School of Clinical Medicine, Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Medical College of Yangzhou University, Yangzhou, China
- Jiangsu College of Nursing, Huai'an, China
| | - Suqin Zhou
- Lianshui People's Hospital, Affiliated Kangda College of Nanjing Medical University, Huai'an, China
| | - Ran Yu
- Lianshui People's Hospital, Affiliated Kangda College of Nanjing Medical University, Huai'an, China
- School of Clinical Medicine, Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Medical College of Yangzhou University, Yangzhou, China
- Jiangsu College of Nursing, Huai'an, China
| | - Caixia Wu
- Lianshui People's Hospital, Affiliated Kangda College of Nanjing Medical University, Huai'an, China
| | - Jiajia Chen
- Lianshui People's Hospital, Affiliated Kangda College of Nanjing Medical University, Huai'an, China
| | - Yao Xiao
- Lianshui People's Hospital, Affiliated Kangda College of Nanjing Medical University, Huai'an, China
- Jiangsu College of Nursing, Huai'an, China
| | - Haoyu Chen
- Lianshui People's Hospital, Affiliated Kangda College of Nanjing Medical University, Huai'an, China
| | - Jian Song
- Lianshui People's Hospital, Affiliated Kangda College of Nanjing Medical University, Huai'an, China
| | - Yan Pan
- Lianshui People's Hospital, Affiliated Kangda College of Nanjing Medical University, Huai'an, China
| | - Wanpeng Wang
- Lianshui People's Hospital, Affiliated Kangda College of Nanjing Medical University, Huai'an, China
- School of Clinical Medicine, Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Medical College of Yangzhou University, Yangzhou, China
- Jiangsu College of Nursing, Huai'an, China
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Esposito C, Tzan K, Machado P, Forsberg F, Dave JK. The Effect of Mixing Iodinated Contrast Media and Ultrasound Contrast Agents on Subharmonic Signals. Ultrason Imaging 2024; 46:130-134. [PMID: 38318708 DOI: 10.1177/01617346241227971] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
Subharmonic aided pressure estimation (SHAPE) is a technique that utilizes subharmonic signals from microbubble contrast agents for pressure estimation. Validation of the SHAPE technique relies on synchronous measurements of in vivo pressures using contrast microbubbles and a pressure catheter (reference standard). For the guidance and placement of pressure catheter in vivo, iodinated contrast is used with fluoroscopy. Therefore, during data acquisition for validation studies of the SHAPE technique, both contrast microbubbles and iodinated contrast are present simultaneously within the vasculature. This study aims to elucidate the effects of iodinated contrast (Visipaque, GE HealthCare) on subharmonic signal amplitude from contrast microbubbles (Definity, Lantheus Medical Imaging, Inc.). In an acrylic water tank, 0.06 mL of Definity and varied amounts of Visipaque (0.14, 0.43, 0.85, and 1.70 mL) were added to 425 mL of deionized water. Ultrasound scanning was performed with a SonixTablet scanner (BK Medical Systems) using optimized parameters for SHAPE with Definity (ftransmit/receive = 3.0/1.5 MHz; chirp down pulse). Subharmonic data was acquired and analyzed at 9 different incident acoustic outputs (n = 3). Results showed an increase in subharmonic signal amplitude from Definity microbubbles in the presence of 0.14 mL Visipaque by 2.8 ± 1.3 dB (p < .001), no change with 0.85 mL Visipaque (0.7 ± 1.2 dB; p = .09) and a decrease in subharmonic amplitude in the presence of 1.70 mL Visipaque by 1.9 ± 0.7 dB (p < .001). While statistically significant effect on subharmonic signal amplitude of Definity microbubbles was noted due to the mixture, the magnitude of the effect was minimal (~2.8 dB) and unlikely to impact in vivo SHAPE measurements.
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Affiliation(s)
- Cara Esposito
- Department of Radiology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Kenneth Tzan
- Department of Radiology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Priscilla Machado
- Department of Radiology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Flemming Forsberg
- Department of Radiology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Jaydev K Dave
- Department of Radiology, Thomas Jefferson University, Philadelphia, PA, USA
- Department of Radiology, Mayo Clinic, Rochester, MN, USA
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Singh P, Jaiswal S, Tripathi DK, Singh VP. Nitric oxide acts upstream of indole-3-acetic acid in ameliorating arsenate stress in tomato seedlings. Plant Physiol Biochem 2024; 208:108461. [PMID: 38461754 DOI: 10.1016/j.plaphy.2024.108461] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 01/24/2024] [Accepted: 02/21/2024] [Indexed: 03/12/2024]
Abstract
After their discovery, nitric oxide (NO) and indole-3-acetic acid (IAA) have been reported as game-changing cellular messengers for reducing abiotic stresses in plants. But, information regarding their shared signaling in regulating metal stress is still unclear. Herein, we have investigated about the joint role of NO and IAA in mitigation of arsenate [As(V)] toxicity in tomato seedlings. Arsenate being a toxic metalloid increases the NPQ level and cell death while decreasing the biomass accumulation, photosynthetic pigments, chlorophyll a fluorescence, endogenous NO content in tomato seedlings. However, application of IAA or SNP to the As(V) stressed seedlings improved growth together with less accumulation of arsenic and thus, preventing cell death. Interestingly, addition of c-PTIO, {2-(4-carboxyphenyl)-4, 4, 5, 5-tetramethylimidazoline-1-oxyl-3-oxide, a scavenger of NO} and 2, 3, 5-triidobenzoic acid (TIBA, an inhibitor of polar auxin transport) further increased cell death and inhibited activity of GST, leading to As(V) toxicity. However, addition of IAA to SNP and TIBA treated seedlings reversed the effect of TIBA resulting into decreased As(V) toxicity. These findings demonstrate that IAA plays a crucial and advantageous function in NO-mediated reduction of As(V) toxicity in seedlings of tomato. Overall, this study concluded that IAA might be acting as a downstream signal for NO-mediated reduction of As(V) toxicity in tomato seedlings.
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Affiliation(s)
- Pooja Singh
- Plant Physiology Laboratory, Department of Botany, C.M.P. Degree College, A Constituent Post Graduate College of University of Allahabad, Prayagraj, 211002, India
| | - Saumya Jaiswal
- Plant Physiology Laboratory, Department of Botany, C.M.P. Degree College, A Constituent Post Graduate College of University of Allahabad, Prayagraj, 211002, India
| | - Durgesh Kumar Tripathi
- Crop Nanobiology and Molecular Stress Physiology Lab Amity Institute of Organic Agriculture, Amity University Uttar Pradesh, Sector-125, Noida, 201313, India
| | - Vijay Pratap Singh
- Plant Physiology Laboratory, Department of Botany, C.M.P. Degree College, A Constituent Post Graduate College of University of Allahabad, Prayagraj, 211002, India.
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Harris KK, Kondratov O, Zolotukhin S. Suspension Culture Production and Purification of Adeno-Associated Virus by Iodixanol Density Gradient Centrifugation for In Vivo Applications. J Vis Exp 2024. [PMID: 38407338 DOI: 10.3791/66460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2024] Open
Abstract
This protocol describes recombinant adeno-associated virus (rAAV) production and purification by iodixanol density gradient centrifugation, a serotype-agnostic method of purifying AAV first described in 1999. rAAV vectors are widely used in gene therapy applications to deliver transgenes to various human cell types. In this work, the recombinant virus is produced by transfection of Expi293 cells in suspension culture with plasmids encoding the transgene, vector capsid, and adenoviral helper genes. Iodixanol density gradient centrifugation purifies full AAV particles based on particle density. Additionally, three steps are included in this now-ubiquitous methodology in order to increase total virus yield, decrease the risk of precipitation due to contaminating proteins, and further concentrate the final virus product, respectively: precipitation of viral particles from cell media using a solution of polyethylene glycol (PEG) and sodium chloride, the introduction of a second round of iodixanol density gradient centrifugation, and buffer exchange via a centrifugal filter. Using this method, it is possible to consistently achieve titers in the range of 1012 viral particles/mL of exceptional purity for in vivo use.
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Ali AM, Khalaf MA, Bhongade BA, Selim KB, Mostafa AS. Exploration of antiproliferative potential of modified triazole-benzohydrazone scaffold: Multitarget approach. Arch Pharm (Weinheim) 2024; 357:e2300383. [PMID: 37946599 DOI: 10.1002/ardp.202300383] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 10/17/2023] [Accepted: 10/19/2023] [Indexed: 11/12/2023]
Abstract
A novel series of triazole-benzohydrazone hybrids was efficiently designed and synthesized as antiproliferative agents, targeting different kinases. All compounds were screened via the National Cancer Institute (NCI) against 60 cancer cell lines, where compounds 16, 17, and 18 exhibited growth inhibition percent (GI%) of various leukemia subpanels with values of 70.33%, 64.13%, and 76.03%, respectively. Compound 18 showed broad-spectrum antiproliferative efficacy toward most cancer cells, with outstanding potency regarding melanoma (MALME-3M GI% = 101.82%) and breast cancer cell lines (MCF7 GI% = 85.87%), while proving safe toward the WI-38 normal cell line, compared to doxorubicin. Multikinase investigation including vascular endothelial growth factor receptor 2 (VEGFR-2), mesenchymal epithelial transition factor (c-Met), proto-oncogene B-Raf, mitogen-activated protein kinase kinase, extracellular signal-regulated kinase, and phosphoinositide 3-kinase was accomplished to reveal its plausible mechanism of action, giving the ultimate potency against both VEGFR-2 and c-Met with IC50 values of 0.055 and 0.042 μM, respectively, while displaying moderate to good inhibition concerning the remaining kinases. DNA binding capability was excluded using the methyl green colorimetric assay. Further, it exhibited both early and late apoptotic induction by about 16- and 9.4-fold over the control, respectively, triggering cell cycle arrest in the G2/M phase. Physicochemical properties and bioavailability radar plot inferred drug-likeness characteristics for compound 18. The molecular docking study assessed the binding pattern with the active sites of c-Met and VEGFR-2.
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Affiliation(s)
- Alaa M Ali
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Mohamed A Khalaf
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
- Chemistry Department, College of Science, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Bhoomendra A Bhongade
- Department of Pharmaceutical Chemistry, RAK College of Pharmacy, RAK Medical & Health Sciences University, Ras Al Khaimah, United Arab Emirates
| | - Khalid B Selim
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Amany S Mostafa
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
- Pharmacy Center of Scientific Excellence, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
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11
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Xie D, Rong J, Cai Z, Guo P, Nan Y, Zhou J. Acute localised exanthematous pustulosis (ALEP)-induced by ioversol. Contact Dermatitis 2024; 90:197-198. [PMID: 37994163 DOI: 10.1111/cod.14465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 11/12/2023] [Accepted: 11/13/2023] [Indexed: 11/24/2023]
Affiliation(s)
- Dong Xie
- Department of First Clinical College of Medicine, Gansu University of Traditional Chinese Medicine, Lanzhou, China
- Department of Neurosurgery, The 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Army, Lanzhou, China
| | - Jian Rong
- Department of First Clinical College of Medicine, Gansu University of Traditional Chinese Medicine, Lanzhou, China
- Department of Neurosurgery, The 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Army, Lanzhou, China
| | - Zhibiao Cai
- Department of Neurosurgery, The 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Army, Lanzhou, China
| | - Penghang Guo
- Department of First Clinical College of Medicine, Gansu University of Traditional Chinese Medicine, Lanzhou, China
- Department of Neurosurgery, The 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Army, Lanzhou, China
| | - Yaqiang Nan
- Department of Neurosurgery, The 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Army, Lanzhou, China
| | - Jie Zhou
- Department of Neurosurgery, The 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Army, Lanzhou, China
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12
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Wang W, Yu R, Wu C, Li Q, Chen J, Xiao Y, Chen H, Song J, Ji M, Zuo Z. Berberine alleviates contrast-induced nephropathy by activating Akt/Foxo3a/Nrf2 signalling pathway. J Cell Mol Med 2024; 28:e18016. [PMID: 37909687 PMCID: PMC10805492 DOI: 10.1111/jcmm.18016] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 10/05/2023] [Accepted: 10/18/2023] [Indexed: 11/03/2023] Open
Abstract
Contrast-induced nephropathy (CIN) is a condition that causes kidney damage in patients receiving angiography with iodine-based contrast agents. This study investigated the potential protective effects of berberine (BBR) against CIN and its underlying mechanisms. The researchers conducted both in vivo and in vitro experiments to explore BBR's renal protective effects. In the in vivo experiments, SD rats were used to create a CIN model, and different groups were established. The results showed that CIN model group exhibited impaired renal function, severe damage to renal tubular cells and increased apoptosis and ferroptosis. However, BBR treatment group demonstrated improved renal function, decreased apoptosis and ferroptosis. Similar results were observed in the in vitro experiments using HK-2 cells. BBR reduced ioversol-induced apoptosis and ferroptosis, and exerted its protective effects through Akt/Foxo3a/Nrf2 signalling pathway. BBR administration increased the expression of Foxo3a and Nrf2 while decreasing the levels of p-Akt and p-Foxo3a. In conclusion, this study revealed that BBR effectively inhibited ioversol-induced apoptosis and ferroptosis in vivo and in vitro. The protective effects of BBR were mediated through the modulation of Akt/Foxo3a/Nrf2 signalling pathway, leading to the alleviation of CIN. These findings suggest that BBR may have therapeutic potential for protecting against CIN in patients undergoing angiography with iodine-based contrast agents.
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Affiliation(s)
- Wanpeng Wang
- Department of Nephrology, Lianshui People's Hospital, Affiliated Kangda College of Nanjing Medical University, Huai'an, Jiangsu, China
- School of Clinical Medicine, Medical College of Yangzhou University, Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Yangzhou, Jiangsu, China
- Jiangsu College of Nursing, Huai'an, Jiangsu, China
| | - Ran Yu
- School of Clinical Medicine, Medical College of Yangzhou University, Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Yangzhou, Jiangsu, China
- Jiangsu College of Nursing, Huai'an, Jiangsu, China
- Department of Cardiology, Lianshui People's Hospital, Affiliated Kangda college of Nanjing Medical University, Huai'an, Jiangsu, China
| | - Caixia Wu
- Department of Nephrology, Lianshui People's Hospital, Affiliated Kangda College of Nanjing Medical University, Huai'an, Jiangsu, China
| | - Qingju Li
- Department of Nephrology, Lianshui People's Hospital, Affiliated Kangda College of Nanjing Medical University, Huai'an, Jiangsu, China
- School of Clinical Medicine, Medical College of Yangzhou University, Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Yangzhou, Jiangsu, China
- Jiangsu College of Nursing, Huai'an, Jiangsu, China
| | - Jiajia Chen
- Department of Nephrology, Lianshui People's Hospital, Affiliated Kangda College of Nanjing Medical University, Huai'an, Jiangsu, China
- Jiangsu College of Nursing, Huai'an, Jiangsu, China
| | - Yao Xiao
- Department of Nephrology, Lianshui People's Hospital, Affiliated Kangda College of Nanjing Medical University, Huai'an, Jiangsu, China
- Jiangsu College of Nursing, Huai'an, Jiangsu, China
| | - Haoyu Chen
- Department of Nephrology, Lianshui People's Hospital, Affiliated Kangda College of Nanjing Medical University, Huai'an, Jiangsu, China
| | - Jian Song
- Department of Nephrology, Lianshui People's Hospital, Affiliated Kangda College of Nanjing Medical University, Huai'an, Jiangsu, China
| | - Mingyue Ji
- Department of Cardiology, Lianshui People's Hospital, Affiliated Kangda college of Nanjing Medical University, Huai'an, Jiangsu, China
| | - Zhi Zuo
- Department of Cardiology, The First Affiliated Hospital with Nanjing Medical University/Jiangsu Province Hospital, Nanjing, Jiangsu, China
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13
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Tan Y, Cai X. Contrast Media Ioversol Interferes with Urinalysis. Clin Lab 2023; 69. [PMID: 37948499 DOI: 10.7754/clin.lab.2023.230661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
BACKGROUND Ioversol is a commonly used non-ionic radiological contrast media in medical imaging to enhance the visualization of blood vessels, tissues, or organs. However, if it is not completely excreted, ioversol can interfere with urinalysis and lead to abnormal test results. METHODS This study reported a case where the contrast media ioversol interfered with Sysmex UN automated urine analyzer. RESULTS UC-3500 displayed no test results except the error code "0401". UF-4000 indicated "abnormally high RBCs" and no parameter results. CONCLUSIONS Urine specimens containing contrast media are considered unqualified samples. Urinalysis should be performed only after the patient has completely excreted the contrast media.
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Hudwekar AD, Kotwal P, Dar MI, Balgotra S, Dogra A, Kour J, Chobe SS, Nandi U, Hussain Syed S, Sawant SD. Pyrazolopyrimidinone Based Selective Inhibitors of PDE5 for the Treatment of Erectile Dysfunction. Chem Biodivers 2023; 20:e202200707. [PMID: 36915218 DOI: 10.1002/cbdv.202200707] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 03/12/2023] [Accepted: 03/13/2023] [Indexed: 03/16/2023]
Abstract
Continuing research with our earlier finding of sildenafil based analogs in the search of new inhibitors of PDE5 for erectile dysfunction suggested that there is a scope of modifications at N-methylpiperazine ring with hydrophobic region followed by hydrogen bond donor or acceptor region. However, the leads identified earlier had some limitations like poor pharmacokinetic (PK) profile, low aqueous solubility and poor bioavailability. In this direction, a new series of sildenafil based analogs were designed, synthesized and screened for their PDE5 inhibitory activity. In this series compound 18 was found to have excellent in vitro activity with selectivity towards PDE5 isozyme, also the in vivo activity and pharmacokinetic profile was excellent. The cyp inhibition and CaCO2 permeability was also excellent for compound 18.
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Affiliation(s)
- Abhinandan D Hudwekar
- Natural Products and Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine, Canal Road, Jammu, 180001, UT of J&K, India
- Academy of Scientific and Innovative Research, Ghaziabad, 201002, Uttar Pradesh, India
- Department of Biochemistry, Vanderbilt University, School of Medicine, Nashville, Tennessee, 37232-0146, United States
| | - Pankul Kotwal
- PK-PD Tox Division, CSIR-Indian Institute of Integrative Medicine, Canal Road, Jammu, 180001, UT of J&K, India
- Academy of Scientific and Innovative Research, Ghaziabad, 201002, Uttar Pradesh, India
| | - Mohd Ishaq Dar
- Pharmacology Division, CSIR-Indian Institute of Integrative Medicine, Sanat Nagar, Srinagar- 190005, UT of J&K, India
- Academy of Scientific and Innovative Research, Ghaziabad, 201002, Uttar Pradesh, India
| | - Shilpi Balgotra
- Natural Products and Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine, Canal Road, Jammu, 180001, UT of J&K, India
- Academy of Scientific and Innovative Research, Ghaziabad, 201002, Uttar Pradesh, India
- Department of Chemistry, Central University of Jammu, Bagla Suchani, 181143, UT of J&K, India
| | - Ashish Dogra
- PK-PD Tox Division, CSIR-Indian Institute of Integrative Medicine, Canal Road, Jammu, 180001, UT of J&K, India
- Academy of Scientific and Innovative Research, Ghaziabad, 201002, Uttar Pradesh, India
| | - Jaspreet Kour
- Natural Products and Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine, Canal Road, Jammu, 180001, UT of J&K, India
- Academy of Scientific and Innovative Research, Ghaziabad, 201002, Uttar Pradesh, India
| | - Santosh S Chobe
- Department of Chemistry, Loknete Vyankatrao Hiray Arts, Science and Commerce College, Nashik, 422003, Maharashtra, India
| | - Utpal Nandi
- PK-PD Tox Division, CSIR-Indian Institute of Integrative Medicine, Canal Road, Jammu, 180001, UT of J&K, India
- Academy of Scientific and Innovative Research, Ghaziabad, 201002, Uttar Pradesh, India
| | - Sajad Hussain Syed
- Pharmacology Division, CSIR-Indian Institute of Integrative Medicine, Sanat Nagar, Srinagar- 190005, UT of J&K, India
- Academy of Scientific and Innovative Research, Ghaziabad, 201002, Uttar Pradesh, India
| | - Sanghapal D Sawant
- Natural Products and Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine, Canal Road, Jammu, 180001, UT of J&K, India
- Academy of Scientific and Innovative Research, Ghaziabad, 201002, Uttar Pradesh, India
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15
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Gómez Gratacos AR, Joyanes Romo JB, Meneses Sotomayor JV, Martin Iglesias MA, Palacios Cañas A, Gómez Torrijos E. Maculopapular rash due to delayed-type hypersensitivity from ioversol with positive patch tests. Contact Dermatitis 2022; 87:379-381. [PMID: 35687812 DOI: 10.1111/cod.14171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 05/27/2022] [Accepted: 06/06/2022] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | | | - Alberto Palacios Cañas
- Allergy Section, Hospital General Universitario. C/ Obispo R. Torija s/n, Ciudad Real, Spain
| | - Elisa Gómez Torrijos
- Allergy Section, Hospital General Universitario. C/ Obispo R. Torija s/n, Ciudad Real, Spain
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16
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Fujii K, Hara Y, Arai MA, Sadhu SK, Ahmed F, Ishibashi M. Natural Compounds with BMI1 Promoter Inhibitory Activity from Mammea siamensis and Andrographis paniculata. Chem Pharm Bull (Tokyo) 2022; 70:885-891. [PMID: 36450587 DOI: 10.1248/cpb.c22-00556] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
A new coumarin derivative (1) and 30 known compounds were isolated from Mammea siamensis and Andrographis paniculata, guided by B cell-specific Moloney murine leukemia virus insertion region 1 (BMI1) promoter inhibitory activity. Among the isolated compounds, 15 compounds showed BMI1 promoter inhibitory activity, and five compounds were found to be cytotoxic. 14-Deoxy-11,12-dehydroandrographolide (18) was highly cytotoxic to DU145 cells with an IC50 value of 25.4 µM. Western blotting analysis of compound 18 in DU145 cells suggested that compound 18 suppresses BMI1 expression.
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Affiliation(s)
- Kazuki Fujii
- Graduate School of Pharmaceutical Sciences, Chiba University
| | - Yasumasa Hara
- Graduate School of Pharmaceutical Sciences, Chiba University
- Plant Molecular Science Center, Chiba University
| | | | | | - Firoj Ahmed
- Department of Pharmaceutical Chemistry, University of Dhaka
| | - Masami Ishibashi
- Graduate School of Pharmaceutical Sciences, Chiba University
- Plant Molecular Science Center, Chiba University
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17
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Pu Y, Katz R, Chen Y, Kostrubsky V, Clarner P, Lo SC, Sosic Z, Yeung B. Development and application of a liquid chromatography-mass spectrometry method for residual iodixanol quantification in AAV-based gene therapy product development. Hum Gene Ther 2021; 33:103-108. [PMID: 34376063 PMCID: PMC10112872 DOI: 10.1089/hum.2021.136] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Adeno-associated viruses (AAVs) are non-enveloped viruses which have become popular gene transfer vectors to deliver DNA to target cells in clinical gene therapy. Iodixanol-based density gradient is one of the widely used purification methods for serotype-independent AAV. However, residual iodixanol in AAV could be a safety concern, and further purification to remove this process-related impurity is typically needed. An analytical assay with high sensitivity is essential for the detection of residual iodixanol to ensure the safety of AAV products. We developed a liquid chromatography-mass spectrometry (LC-MS) method with the limit of quantification (LOQ) of 0.01 μg/mL for residual iodixanol measurement in AAV. The method also demonstrated linearity over four orders of magnitude which allows quantifying a high iodixanol concentration in in-process samples with excellent recovery and accuracy. In addition, we further explored a highly efficient purification method for removal of the residual iodixanol, to minimize the safety concern from iodixanol as a process impurity.
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Affiliation(s)
- Yi Pu
- Analytical Development, Cambridge, Massachusetts, USA
- Correspondence: Dr. Yi Pu, Analytical Development, Biogen, Inc., 225 Binney Street, Cambridge, MA 02142, USA.
| | - Russell Katz
- Gene Therapy-Process Development, Cambridge, Massachusetts, USA
| | - Yunqiu Chen
- Analytical Development, Cambridge, Massachusetts, USA
| | | | - Pete Clarner
- Gene Therapy Accelerator Unit, Cambridge, Massachusetts, USA
| | - Shih-Ching Lo
- Research, Biogen, Inc., Cambridge, Massachusetts, USA
| | - Zoran Sosic
- Analytical Development, Cambridge, Massachusetts, USA
| | - Bernice Yeung
- Analytical Development, Cambridge, Massachusetts, USA
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18
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Veerman RE, Teeuwen L, Czarnewski P, Güclüler Akpinar G, Sandberg A, Cao X, Pernemalm M, Orre LM, Gabrielsson S, Eldh M. Molecular evaluation of five different isolation methods for extracellular vesicles reveals different clinical applicability and subcellular origin. J Extracell Vesicles 2021; 10:e12128. [PMID: 34322205 PMCID: PMC8298890 DOI: 10.1002/jev2.12128] [Citation(s) in RCA: 103] [Impact Index Per Article: 34.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 06/21/2021] [Accepted: 07/13/2021] [Indexed: 12/14/2022] Open
Abstract
Extracellular vesicles (EVs) are increasingly tested as therapeutic vehicles and biomarkers, but still EV subtypes are not fully characterised. To isolate EVs with few co-isolated entities, a combination of methods is needed. However, this is time-consuming and requires large sample volumes, often not feasible in most clinical studies or in studies where small sample volumes are available. Therefore, we compared EVs rendered by five commonly used methods based on different principles from conditioned cell medium and 250 μl or 3 ml plasma, that is, precipitation (ExoQuick ULTRA), membrane affinity (exoEasy Maxi Kit), size-exclusion chromatography (qEVoriginal), iodixanol gradient (OptiPrep), and phosphatidylserine affinity (MagCapture). EVs were characterised by electron microscopy, Nanoparticle Tracking Analysis, Bioanalyzer, flow cytometry, and LC-MS/MS. The different methods yielded samples of different morphology, particle size, and proteomic profile. For the conditioned medium, Izon 35 isolated the highest number of EV proteins followed by exoEasy, which also isolated fewer non-EV proteins. For the plasma samples, exoEasy isolated a high number of EV proteins and few non-EV proteins, while Izon 70 isolated the most EV proteins. We conclude that no method is perfect for all studies, rather, different methods are suited depending on sample type and interest in EV subtype, in addition to sample volume and budget.
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Affiliation(s)
- Rosanne E. Veerman
- Department of Clinical Immunology and Transfusion Medicine and Division of Immunology and Allergy, Department of Medicine SolnaKarolinska University Hospital and Karolinska InstitutetStockholmSweden
| | - Loes Teeuwen
- Department of Clinical Immunology and Transfusion Medicine and Division of Immunology and Allergy, Department of Medicine SolnaKarolinska University Hospital and Karolinska InstitutetStockholmSweden
| | - Paulo Czarnewski
- Science for Life LaboratoryDepartment of Biochemistry and BiophysicsNational Bioinformatics Infrastructure SwedenStockholm UniversitySolnaSweden
| | - Gözde Güclüler Akpinar
- Department of Clinical Immunology and Transfusion Medicine and Division of Immunology and Allergy, Department of Medicine SolnaKarolinska University Hospital and Karolinska InstitutetStockholmSweden
| | - AnnSofi Sandberg
- Department of Oncology and PathologyKarolinska InstitutetScience for Life LaboratorySolnaSweden
| | - Xiaofang Cao
- Department of Oncology and PathologyKarolinska InstitutetScience for Life LaboratorySolnaSweden
| | - Maria Pernemalm
- Department of Oncology and PathologyKarolinska InstitutetScience for Life LaboratorySolnaSweden
| | - Lukas M. Orre
- Department of Oncology and PathologyKarolinska InstitutetScience for Life LaboratorySolnaSweden
| | - Susanne Gabrielsson
- Department of Clinical Immunology and Transfusion Medicine and Division of Immunology and Allergy, Department of Medicine SolnaKarolinska University Hospital and Karolinska InstitutetStockholmSweden
| | - Maria Eldh
- Department of Clinical Immunology and Transfusion Medicine and Division of Immunology and Allergy, Department of Medicine SolnaKarolinska University Hospital and Karolinska InstitutetStockholmSweden
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19
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Ghaghada KB, Ren P, Devkota L, Starosolski Z, Zhang C, Vela D, Stupin IV, Tanifum EA, Annapragada AV, Shen YH, LeMaire SA. Early Detection of Aortic Degeneration in a Mouse Model of Sporadic Aortic Aneurysm and Dissection Using Nanoparticle Contrast-Enhanced Computed Tomography. Arterioscler Thromb Vasc Biol 2021; 41:1534-1548. [PMID: 33535789 PMCID: PMC7990703 DOI: 10.1161/atvbaha.120.315210] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
[Figure: see text].
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Affiliation(s)
- Ketan B Ghaghada
- Edward B. Singleton Department of Radiology, Texas Children's Hospital, Houston (K.B.G., L.D., Z.S., I.V.S., E.A.T., A.V.A.)
- Department of Radiology (K.B.G., Z.S., E.A.T., A.V.A.), Baylor College of Medicine, Houston, TX
- Cardiovascular Research Institute (K.B.G., A.V.A., Y.H.S., S.A.L.), Baylor College of Medicine, Houston, TX
| | - Pingping Ren
- Division of Cardiothoracic Surgery, Michael E. DeBakey Department of Surgery (P.R., C.Z., Y.H.S., S.A.L.), Baylor College of Medicine, Houston, TX
| | - Laxman Devkota
- Edward B. Singleton Department of Radiology, Texas Children's Hospital, Houston (K.B.G., L.D., Z.S., I.V.S., E.A.T., A.V.A.)
- Department of Pediatrics, Section of Hematology-Oncology (L.D.), Baylor College of Medicine, Houston, TX
| | - Zbigniew Starosolski
- Edward B. Singleton Department of Radiology, Texas Children's Hospital, Houston (K.B.G., L.D., Z.S., I.V.S., E.A.T., A.V.A.)
- Department of Radiology (K.B.G., Z.S., E.A.T., A.V.A.), Baylor College of Medicine, Houston, TX
| | - Chen Zhang
- Division of Cardiothoracic Surgery, Michael E. DeBakey Department of Surgery (P.R., C.Z., Y.H.S., S.A.L.), Baylor College of Medicine, Houston, TX
| | - Deborah Vela
- Department of Cardiovascular Pathology Research (D.V.), Texas Heart Institute, Houston
| | - Igor V Stupin
- Edward B. Singleton Department of Radiology, Texas Children's Hospital, Houston (K.B.G., L.D., Z.S., I.V.S., E.A.T., A.V.A.)
| | - Eric A Tanifum
- Edward B. Singleton Department of Radiology, Texas Children's Hospital, Houston (K.B.G., L.D., Z.S., I.V.S., E.A.T., A.V.A.)
- Department of Radiology (K.B.G., Z.S., E.A.T., A.V.A.), Baylor College of Medicine, Houston, TX
| | - Ananth V Annapragada
- Edward B. Singleton Department of Radiology, Texas Children's Hospital, Houston (K.B.G., L.D., Z.S., I.V.S., E.A.T., A.V.A.)
- Department of Radiology (K.B.G., Z.S., E.A.T., A.V.A.), Baylor College of Medicine, Houston, TX
- Cardiovascular Research Institute (K.B.G., A.V.A., Y.H.S., S.A.L.), Baylor College of Medicine, Houston, TX
| | - Ying H Shen
- Cardiovascular Research Institute (K.B.G., A.V.A., Y.H.S., S.A.L.), Baylor College of Medicine, Houston, TX
- Division of Cardiothoracic Surgery, Michael E. DeBakey Department of Surgery (P.R., C.Z., Y.H.S., S.A.L.), Baylor College of Medicine, Houston, TX
- Department of Cardiovascular Surgery (Y.H.S., S.A.L.), Texas Heart Institute, Houston
| | - Scott A LeMaire
- Cardiovascular Research Institute (K.B.G., A.V.A., Y.H.S., S.A.L.), Baylor College of Medicine, Houston, TX
- Division of Cardiothoracic Surgery, Michael E. DeBakey Department of Surgery (P.R., C.Z., Y.H.S., S.A.L.), Baylor College of Medicine, Houston, TX
- Department of Cardiovascular Surgery (Y.H.S., S.A.L.), Texas Heart Institute, Houston
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20
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Zhao P, Zhu Y, Sun L, Zhu W, Lu Y, Zhang J, Mao Y, Chen Q, Zhang F. Circulating Exosomal miR-1-3p from Rats with Myocardial Infarction Plays a Protective Effect on Contrast-Induced Nephropathy via Targeting ATG13 and activating the AKT Signaling Pathway. Int J Biol Sci 2021; 17:972-985. [PMID: 33867822 PMCID: PMC8040303 DOI: 10.7150/ijbs.55887] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Accepted: 02/05/2021] [Indexed: 12/19/2022] Open
Abstract
Rationale: With the widespread development of the interventional technique for cardiovascular diseases and the widespread use of contrast medium (CM), the incidence of contrast-induced nephropathy (CIN) has been increasing, which is associated with poor prognosis for cardiovascular diseases. This study aims to explore the effect of circulating exosomal microRNA from patients with myocardial infarction (MI) on CIN and related molecular mechanism. Methods: A rat MI model was established by ligating the left anterior descending coronary artery. Circulating exosomes were isolated from control (Exo-NC) and MI rats (Exo-MI) using a commercial kit. The in vivo and in vitro models of CIN were created using iodixanol. Reverse transcription quantitative PCR (RT-qPCR) was utilized to detect the expression of miR-1-3p. Western blot (WB) was used to detect the expression of exosomal surface markers, and apoptosis-related and autophagy-related proteins. The apoptosis rate was examined by terminal deoxynucleotidyl transferase (TdT)-mediated dUTP nick end labeling (TUNEL) staining and flow cytometry (FC). Transmission electron microscopy (TEM) was utilized to observe the exosomes and autophagosomes. Rat kidney injury was assessed by hematoxylin and eosin (H&E) staining and kidney injury molecule-1 (KIM-1) immunohistochemical staining. Renal function of rats was assessed by detecting the levels of blood urea nitrogen (BUN) and serum creatinine (Cr). The dual luciferase reporter assay was performed to identify the target gene of miR-1-3p. Results: The treatment of CM induced NRK-52E cell damage, which manifested as enhanced cell autophagy and enhanced apoptosis. The Exo-MI treatment significantly inhibited the CM-induced autophagy and apoptosis of NRK-52E cells. Furthermore, the Exo-MI treatment increased the Bcl-2 expression, but decreased the Bax expression and the ratio of LC3II/LC3I. Furthermore, the results of the TUNEL staining and FC showed that Exo-MI can reduce apoptotic rate. Through TEM, it was found that Exo-MI reduced the number of autophagosomes in NRK-52E cells. The rescue experiments revealed that the function of Exo-MI is to inhibit the CM-induced autophagy and apoptosis of NRK-52E cells, which can be inhibited by the miR-1-3p inhibitor. Furthermore, it was found that the overexpression of miR-1-3p can also inhibit the CM-induced autophagy and apoptosis of NRK-52E cells. Through dual luciferase reporter assay, ATG13 was found to be the target of miR-1-3p. In addition, the overexpression of miR-1-3p significantly reversed the CM-induced decrease in phosphorylation level of AKT. Furthermore, ATG13 silencing can also inhibit the CM-induced autophagy and apoptosis of NRK-52E cells. In vivo, Exo-MI significantly alleviated the renal injury, reduced the renal fibrosis, and improved the renal function of CIN rats. Conclusion: The circulating exosomal miR-1-3p after MI inhibited the CM-induced apoptosis and autophagy of renal tubular epithelial cells, and improved the renal function of rats by targeting ATG13 and activating the AKT signaling pathway.
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Affiliation(s)
- Pengcheng Zhao
- Section of Pacing and Electrophysiology, Division of Cardiology, the First Affiliated Hospital with Nanjing Medical University, Nanjing, China
| | - Yeqian Zhu
- Section of Pacing and Electrophysiology, Division of Cardiology, the First Affiliated Hospital with Nanjing Medical University, Nanjing, China
| | - Ling Sun
- Section of Pacing and Electrophysiology, Division of Cardiology, the First Affiliated Hospital with Nanjing Medical University, Nanjing, China
- Department of Cardiology, the Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, Changzhou, China
| | - Wenwu Zhu
- Section of Pacing and Electrophysiology, Division of Cardiology, the First Affiliated Hospital with Nanjing Medical University, Nanjing, China
| | - Yao Lu
- Section of Pacing and Electrophysiology, Division of Cardiology, the First Affiliated Hospital with Nanjing Medical University, Nanjing, China
| | - Jian Zhang
- Section of Pacing and Electrophysiology, Division of Cardiology, the First Affiliated Hospital with Nanjing Medical University, Nanjing, China
| | - Yangming Mao
- Section of Pacing and Electrophysiology, Division of Cardiology, the First Affiliated Hospital with Nanjing Medical University, Nanjing, China
| | - Qiushi Chen
- Section of Pacing and Electrophysiology, Division of Cardiology, the First Affiliated Hospital with Nanjing Medical University, Nanjing, China
| | - Fengxiang Zhang
- Section of Pacing and Electrophysiology, Division of Cardiology, the First Affiliated Hospital with Nanjing Medical University, Nanjing, China
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Nasukawa T, Sugimoto R, Uchiyama J, Takemura-Uchiyama I, Murakami H, Fukuda K, Matsuzaki S, Sakaguchi M. Purification of membrane vesicles from Gram-positive bacteria using flow cytometry, after iodixanol density-gradient ultracentrifugation. Res Microbiol 2020; 172:103792. [PMID: 33220407 DOI: 10.1016/j.resmic.2020.11.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 11/06/2020] [Accepted: 11/06/2020] [Indexed: 11/20/2022]
Abstract
Membrane vesicles (MVs) play biologically important roles in Gram-positive bacteria, and purification is essential for their study. Although high-performance flow cytometry has the capability to quantify and isolate specific small particles, it has not been examined for MV isolation. In this study, we used high-performance flow cytometry to analyze MV from Gram-positive bacteria, Staphylococcus aureus and Bacillus subtilis, prepared by iodixanol density-gradient ultracentrifugation. Analysis of the quality of MV samples before and after sorting showed that the flow cytometric sorting provided higher purity and uniformity compared to gradient isolation alone. The MV purification method using flow cytometry should prove useful for applications requiring a very high purity of MV samples such as proteomic, metagenomic or lipidomic studies.
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Affiliation(s)
| | - Ryosuke Sugimoto
- School of Veterinary Medicine, Azabu University, Kanagawa, Japan
| | - Jumpei Uchiyama
- School of Veterinary Medicine, Azabu University, Kanagawa, Japan.
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Abstract
To determine which factor is associated with presence of fat stranding sign for acute appendicitis on computed tomography (CT).This study reviewed the CT imaging of adults with proven acute appendicitis at a single center from January 1, 2015 to December 31, 2019. Logistic regression models were used to investigate the association between clinical characteristics and fat stranding sign. Receiver operating characteristic (ROC) curve analysis was used to determine the cutoff value that helped predict the presence of fat stranding on CT.In total, 413 patients were included. Age of ≥40 years (OR: 3.10; 95% CI, 2.02-4.74; P < .0001), body mass index of ≥23 kg/m (OR: 2.86; 1.89-4.34; P < .0001), white blood cell count of ≥10,000/μl (OR: 1.77; 1.05-2.99; P = .0316), and C-reactive protein level of ≥2.4 mg/dl (OR: 3.17; 1.97-5.08; P < .0001) were significant factors predicting fat stranding on CT. The ROC analysis with above 4 factors showed an area under the curve of 0.76 (0.71-0.80).Body habitus, advanced age, and elevated inflammatory marker levels were independent in predicting fat stranding for patients with acute appendicitis.
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Affiliation(s)
- Hui-An Lin
- Department of Emergency Medicine, Taipei Medical University Hospital
| | - Sheng-Feng Lin
- Division of Physician Hospitalist, Department of Internal Medicine
- Department of Neurology, Far Eastern Memorial Hospital, New Taipei
- School of Public Health, College of Public Health, Taipei Medical University, Taipei, Taiwan
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Rogers S, Lowe C, Carreira J, McCollum C, Ghosh J. Comparison of Contrast-Enhanced Tomographic 3-D Ultrasound Against Rotational Angiography Imaging Immediately After Endovascular Aneurysm Repair. Ultrasound Med Biol 2019; 45:2356-2362. [PMID: 31253465 DOI: 10.1016/j.ultrasmedbio.2019.05.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 05/09/2019] [Accepted: 05/28/2019] [Indexed: 06/09/2023]
Abstract
This proof of principle study assesses the utility of contrast-enhance ultrasound (CEUS) and contrast-enhanced tomographic 3-D ultrasound (CEtUS), as an intra-procedural imaging tool after endovascular-aneurysm repair (EVAR), compared with rotational angiography. A total of 20 consecutive patients undergoing infra-renal EVAR underwent immediate post-deployment rotational angiography, followed by CEUS and CEtUS scans. Outcomes were presence of endoleak, renal artery patency and endograft deformity. CEUS and CEtUS detected 12 endoleaks, 8 of which were not detected by rotational angiography. CEUS and CEtUS classify 7 or 8 type IIb endoleaks not detected by rotational angiography. CEUS/CEtUS could not identify 12 and 13 renal arteries, respectively, detected by rotational angiography. Rotational angiography and CEtUS both identified 1 endograft limb deformity, corrected immediately. CEUS and CEtUS are more sensitive to type II endoleak than rotational angiography, although there is a lower detection of renal arteries. CEUS or CEtUS has the utility for immediate post-EVAR endoleak detection where reduction of contrast agent is indicated.
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Affiliation(s)
- Steven Rogers
- Academic Surgery Unit, Division of Cardiovascular Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Wythenshawe Hospital, Wythenshawe, Manchester, UK; Department of Vascular and Endovascular Surgery, Wythenshawe Hospital, Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK; Independent Vascular Services Ltd, Wythenshawe Hospital, Manchester University NHS Foundation Trust, Wythenshawe, Manchester, UK.
| | - Christopher Lowe
- Academic Surgery Unit, Division of Cardiovascular Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Wythenshawe Hospital, Wythenshawe, Manchester, UK
| | - Joao Carreira
- Independent Vascular Services Ltd, Wythenshawe Hospital, Manchester University NHS Foundation Trust, Wythenshawe, Manchester, UK
| | - Charles McCollum
- Academic Surgery Unit, Division of Cardiovascular Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Wythenshawe Hospital, Wythenshawe, Manchester, UK; Department of Vascular and Endovascular Surgery, Wythenshawe Hospital, Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | - Jonathan Ghosh
- Department of Vascular and Endovascular Surgery, Wythenshawe Hospital, Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
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Shakeri S, Afshari Mirak S, Mohammadian Bajgiran A, Pantuck A, Sisk A, Ahuja P, Lu DS, Raman SS. The effect of tumor size and location on efficacy and safety of US- and CT- guided percutaneous microwave ablation in renal cell carcinomas. Abdom Radiol (NY) 2019; 44:2308-2315. [PMID: 30847565 DOI: 10.1007/s00261-019-01967-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
PURPOSE To evaluate the effect of size and central location of the tumor on safety and efficacy of percutaneous CEUS- and CT-guided MWA in biopsy-proven renal cell carcinomas (RCCs). MATERIALS AND METHODS In this IRB-approved retrospective study, 69 biopsy-proven renal tumors in 56 patients, who underwent MWA in our institution from January 2013 to March 2017, were evaluated. Data collection included demographics, tumor characteristics, procedural protocols, and follow-up visits within 6 months post procedure. Primary outcomes were assessed by technical success (TS), local tumor progression (LTP), and complications. The Kaplan-Meier analysis was used for survival rate. RESULTS Overall technical success was achieved for all 69 lesions (92.8% primary TS, 100% overall). Median nephrometry score was 8 (4-11) and median tumor size was 2.5 cm (0.8-7). Five lesions which required second ablation had significantly higher median tumor size 4 cm (P = 0.039) with the same nephrometry score. Renal function remained stable with no significant change in eGFR before or after ablation. The LTP rate was 5.8%. The most recurrent tumors were clear cell (50%) followed by papillary tumors (25%). The complication rate was 5.8% with minor complications (hematoma and pain) and no major issues. There was no significant association between nephrometry score and technical success, recurrence, or complication rates. Overall and tumor-specific survival rates were 96.7% and 100% at 11.9 months. CONCLUSIONS Image-guided MWA appears to be a safe and effective treatment regardless of nephrometry score and tumor location with high technical success, low recurrence, and complication rates.
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Affiliation(s)
- Sepideh Shakeri
- Department of Radiological Sciences, David Geffen School of Medicine at UCLA, 757 Westwood Plaza, Los Angeles, CA, 90095, USA.
| | - Sohrab Afshari Mirak
- Department of Radiological Sciences, David Geffen School of Medicine at UCLA, 757 Westwood Plaza, Los Angeles, CA, 90095, USA
| | | | - Allan Pantuck
- Department of Urology, David Geffen School of Medicine at UCLA, 757 Westwood Plaza, Los Angeles, CA, 90095, USA
| | - Anthony Sisk
- Department of Pathology, David Geffen School of Medicine at UCLA, 757 Westwood Plaza, Los Angeles, CA, 90095, USA
| | - Preeti Ahuja
- Department of Radiological Sciences, David Geffen School of Medicine at UCLA, 757 Westwood Plaza, Los Angeles, CA, 90095, USA
| | - David S Lu
- Department of Radiological Sciences, David Geffen School of Medicine at UCLA, 757 Westwood Plaza, Los Angeles, CA, 90095, USA
| | - Steven S Raman
- Department of Radiological Sciences, David Geffen School of Medicine at UCLA, 757 Westwood Plaza, Los Angeles, CA, 90095, USA
- Department of Urology, David Geffen School of Medicine at UCLA, 757 Westwood Plaza, Los Angeles, CA, 90095, USA
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Abstract
PURPOSE Establish normal attenuation ratios for vein to artery on CT IVC venogram and determine a vascular attenuation ratio diagnostic of thrombus. METHODS This retrospective, HIPAA-compliant study included 56 CT IVC venograms. Images were reviewed for the presence of femoral vein or IVC thrombus. Attenuation ratios for each vein and its corresponding artery were calculated by two observers and averaged in four venous stations (right and left femoral veins, and IVC at the confluence of the iliac veins and at the left renal vein). The reference standard for the absence of thrombus was clinical follow-up and for the presence of thrombus it was thrombectomy or catheter venogram. Receiver operating characteristic (ROC) analysis was performed using ratios from one venous station and threshold for thrombus was determined using the Youden's index. RESULTS 36 of 56 CTs demonstrated no thrombus. 20 CTs demonstrated thrombus, confirmed in eight patients. For CTs with no thrombus, median ratios among the venous stations ranged from 0.89 (IQR 0.83-0.93) to 0.91 (IQR 0.86-0.94). ROC analysis of ratios from a single representative station (left femoral vein, n = 4 confirmed clots) demonstrated an area under the curve (AUC) of 0.994 (p = 0.001) and a threshold of 0.67 for diagnosing thrombus [sensitivity 100% (95% CI 39.76-100%), specificity 97.5% (86.84-99.94%)]. CONCLUSION The normal attenuation ratio of vein to artery in the absence of venous thrombus on a 3-min delay CT IVC venogram is approximately 0.91. A ratio less than 0.67 is highly suggestive of thrombus.
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Affiliation(s)
- Marina Mityul
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, Campus Box 8131, 510 S. Kingshighway Blvd, St Louis, MO, 63110, USA
| | - David J Kim
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, Campus Box 8131, 510 S. Kingshighway Blvd, St Louis, MO, 63110, USA
| | - Amber Salter
- Division of Biostatistics, Washington University School of Medicine, Campus Box 8067, 660 Euclid Ave., St Louis, MO, 63110-1093, USA
| | - Motoyo Yano
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, Campus Box 8131, 510 S. Kingshighway Blvd, St Louis, MO, 63110, USA.
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Duong P, Chung A, Bouchareychas L, Raffai RL. Cushioned-Density Gradient Ultracentrifugation (C-DGUC) improves the isolation efficiency of extracellular vesicles. PLoS One 2019; 14:e0215324. [PMID: 30973950 PMCID: PMC6459479 DOI: 10.1371/journal.pone.0215324] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 03/31/2019] [Indexed: 12/16/2022] Open
Abstract
Ultracentrifugation (UC) is recognized as a robust approach for the isolation of extracellular vesicles (EVs). However, recent studies have highlighted limitations of UC including low recovery efficiencies and aggregation of EVs that could impact downstream functional analyses. We tested the benefit of using a liquid cushion of iodixanol during UC to address such shortcomings. In this study, we compared the yield and purity of EVs isolated from J774A.1 macrophage conditioned media by conventional UC and cushioned-UC (C-UC). We extended our study to include two other common EV isolation approaches: ultrafiltration (UF) and polyethylene glycol (PEG) sedimentation. After concentrating EVs using these four methods, the concentrates underwent further purification by using OptiPrep density gradient ultracentrifugation (DGUC). Our data show that C-DGUC provides a two-fold improvement in EV recovery over conventional UC-DGUC. We also found that UF-DGUC retained ten-fold more protein while PEG-DGUC achieved similar performance in nanoparticle and protein recovery compared to C-DGUC. Regarding purity as assessed by nanoparticle to protein ratio, our data show that EVs isolated by UC-DGUC achieved the highest purity while C-DGUC and PEG-DGUC led to similarly pure preparations. Collectively, we demonstrate that the use of a high-density iodixanol cushion during the initial concentration step improves the yield of EVs derived from cell culture media compared to conventional UC. This enhanced yield without substantial retention of protein contaminants and without exposure to forces causing aggregation offers new opportunities for the isolation of EVs that can subsequently be used for functional studies.
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Affiliation(s)
- Phat Duong
- Surgical Service San Francisco VA Medical Center, San Francisco, California, United States of America
| | - Allen Chung
- Surgical Service San Francisco VA Medical Center, San Francisco, California, United States of America
| | - Laura Bouchareychas
- Surgical Service San Francisco VA Medical Center, San Francisco, California, United States of America
- Division of Vascular and Endovascular Surgery, Department of Surgery, University of California, San Francisco, California, United States of America
| | - Robert L. Raffai
- Surgical Service San Francisco VA Medical Center, San Francisco, California, United States of America
- Division of Vascular and Endovascular Surgery, Department of Surgery, University of California, San Francisco, California, United States of America
- * E-mail:
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27
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Yan WQ, Xin YK, Jing Y, Li GF, Wang SM, Rong WC, Xiao G, Lei XB, Li B, Hu YC, Cui GB. Iodine Quantification Using Dual-Energy Computed Tomography for Differentiating Thymic Tumors. J Comput Assist Tomogr 2018; 42:873-880. [PMID: 30339550 PMCID: PMC6250292 DOI: 10.1097/rct.0000000000000800] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Accepted: 08/17/2018] [Indexed: 12/27/2022]
Abstract
The aim of the study was to explore the efficacy of iodine quantification with dual-energy computed tomography (DECT) in differentiating thymoma, thymic carcinoma, and thymic lymphoma. MATERIALS AND METHODS Fifty-seven patients with pathologically confirmed low-risk thymoma (n = 16), high-risk thymoma (n = 15), thymic carcinoma (n = 14), and thymic lymphoma (n = 12) underwent chest contrast-enhanced DECT scan were enrolled in this study. Tumor DECT parameters including iodine-related Hounsfield unit (IHU), iodine concentration (IC), mixed HU (MHU), and iodine ratio in dual phase, slope of energy spectral HU curve (λ), and virtual noncontrast (VNC) were compared for differences among 4 groups by one-way analysis of variance. Receiver operating characteristic curve was used to determine the efficacy for differentiating the low-risk thymoma from other thymic tumor by defined parameters. RESULTS According to quantitative analysis, dual-phase IHU, IC, and MHU values in patients with low-risk thymoma were significantly increased compared with patients with high-risk thymoma, thymic carcinoma, and thymic lymphoma (P < 0.05/4).The venous phase IHU value yielded the highest performance with area under the curve of 0.893, 75.0% sensitivity, and 89.7% specificity for differentiating the low-risk thymomas from high-risk thymomas or thymic carcinoma at the cutoff value of 34.3 HU. When differentiating low-risk thymomas from thymic lymphoma, the venous phase IC value obtained the highest diagnostic efficacy with the area under the curve of 0.969, and sensitivity, specificity, and cutoff value were 87.5%, 100.0%, and 1.25 mg/mL, respectively. CONCLUSIONS Iodine quantification with DECT may be useful for differentiating the low-risk thymomas from other thymic tumors.
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Affiliation(s)
- Wei-Qiang Yan
- From the Department of Radiology & Functional and Molecular Imaging Key Lab of Shaanxi Province, and
| | - Yong-Kang Xin
- From the Department of Radiology & Functional and Molecular Imaging Key Lab of Shaanxi Province, and
| | - Yong Jing
- From the Department of Radiology & Functional and Molecular Imaging Key Lab of Shaanxi Province, and
| | - Gang-Feng Li
- From the Department of Radiology & Functional and Molecular Imaging Key Lab of Shaanxi Province, and
| | - Shu-Mei Wang
- Department of Pathology, Tangdu Hospital, the Military Medical University of PLA Airforce (Fourth Military Medical University), Shaanxi, PR China
| | - Wei-Cheng Rong
- From the Department of Radiology & Functional and Molecular Imaging Key Lab of Shaanxi Province, and
| | - Gang Xiao
- From the Department of Radiology & Functional and Molecular Imaging Key Lab of Shaanxi Province, and
| | - Xue-Bin Lei
- From the Department of Radiology & Functional and Molecular Imaging Key Lab of Shaanxi Province, and
| | - Bo Li
- From the Department of Radiology & Functional and Molecular Imaging Key Lab of Shaanxi Province, and
| | - Yu-Chuan Hu
- From the Department of Radiology & Functional and Molecular Imaging Key Lab of Shaanxi Province, and
| | - Guang-Bin Cui
- From the Department of Radiology & Functional and Molecular Imaging Key Lab of Shaanxi Province, and
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Precht H, Gerke O, Thygesen J, Egstrup K, Auscher S, Waaler D, Lambrechtsen J. Image quality in coronary computed tomography angiography: influence of adaptive statistical iterative reconstruction at various radiation dose levels. Acta Radiol 2018; 59:1194-1202. [PMID: 29359950 DOI: 10.1177/0284185117753657] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Background Computed tomography (CT) technology is rapidly evolving and software solution developed to optimize image quality and/or lower radiation dose. Purpose To investigate the influence of adaptive statistical iterative reconstruction (ASIR) at different radiation doses in coronary CT angiography (CCTA) in detailed image quality. Material and Methods A total of 160 CCTA were reconstructed as follows: 55 scans with filtered back projection (FBP) (650 mA), 51 scans (455 mA) with 30% ASIR (ASIR30), and 54 scans (295 mA) with 60% ASIR (ASIR60). For each reconstruction, subjective image quality was assessed by five independent certified cardiologists using a visual grading analysis (VGA) with five predefined image quality criteria consisting of a 5-point scale. Objective measures were contrast, noise, and contrast-to-noise ratio (CNR). Results The CTDIvol resulted in 10.3 mGy, 7.4 mGy, and 4.6 mGy for FBP, ASIR30, and ASIR60, respectively. Homogeneity of the left ventricular lumen was the sole aspect in which reconstruction algorithms differed with a decreasing effect for ASIR60 compared to FBP (estimated odds ratio [OR] = 0.49 [95% confidence interval (CI) = 0.32-0.76; P = 0.001]). Decreased sharpness and spatial- and low-contrast resolutions were observed when using ASIR instead of FBP, but differences were not statistically significant. Concerning objective measurements, noise increased significantly for ASIR30 (OR = 1.08; 95% CI = 1.02-1.14; P = 0.006) and ASIR60 (OR = 1.06; 95% CI = 1.01-1.12; P = 0.034) compared to FBP. Conclusion ASIR significantly decreased the subjectively assessed homogeneity of the left ventricular lumen and increased the objectively measured noise compared to FBP. Considering these results, ASIR at a reduced radiation dose should be implemented with caution.
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Affiliation(s)
- Helle Precht
- 1 Department of Medical Research, Odense University Hospital Svendborg, Svendborg, Denmark
- 2 Conrad Research Center, University College Lillebelt, Odense, Denmark
| | - Oke Gerke
- 3 Department of Nuclear Medicine, Odense University Hospital, Odense, Denmark
- 4 Centre of Health Economics Research, University of Southern Denmark, Odense, Denmark
| | - Jesper Thygesen
- 5 Department of Clinical Engineering, Central Denmark Region, Århus, Denmark
| | - Kenneth Egstrup
- 1 Department of Medical Research, Odense University Hospital Svendborg, Svendborg, Denmark
| | - Søren Auscher
- 1 Department of Medical Research, Odense University Hospital Svendborg, Svendborg, Denmark
| | - Dag Waaler
- 6 Norwegian University of Science and Technology, Gjøvik, Norway
| | - Jess Lambrechtsen
- 1 Department of Medical Research, Odense University Hospital Svendborg, Svendborg, Denmark
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Mulder HW, van Stralen M, Ren B, Haak A, van Burken G, Viergever MA, Bosch JG, Pluim JPW. Selection Strategies for Atlas-Based Mosaicing of Left Atrial 3-D Transesophageal Echocardiography Data. Ultrasound Med Biol 2018; 44:1533-1543. [PMID: 29673702 DOI: 10.1016/j.ultrasmedbio.2018.02.004] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 01/14/2018] [Accepted: 02/08/2018] [Indexed: 06/08/2023]
Abstract
Three-dimensional transesophageal echocardiography (TEE) provides real-time soft tissue information, but its use is hampered by its limited field of view. The mosaicing of multiple TEE views makes it possible to visualize a large structure, like the left atrium, in a single volume. To this end, an automatic registration method is required. Similarly to atlas-based segmentation approaches, atlas-based mosaicing (ABM) uses a full volume atlas set to moderate the onerous registration of the individual TEE views. The performance of ABM depends both on the quality of the involved registrations and on the selection of the optimal transformation from the candidate transformations that result from the various atlases. The study described here explored the performance of different selection strategies on multiview TEE data of the left atrium. We found that by incorporating two stages of transformation selection, using the image similarity and the conformity between the candidate transformations as selection criteria, the average registration error dropped below 3 mm with respect to manual registration of these data. Finally, we used this method for the automatic construction of a wide-view TEE volume of the left atrium.
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Affiliation(s)
- Harriët W Mulder
- Center for Image Sciences, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Marijn van Stralen
- Center for Image Sciences, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Ben Ren
- Department of Cardiology, Thoraxcenter, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Alexander Haak
- Department of Biomedical Engineering, Thoraxcenter, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Gerard van Burken
- Department of Biomedical Engineering, Thoraxcenter, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Max A Viergever
- Center for Image Sciences, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Johan G Bosch
- Department of Biomedical Engineering, Thoraxcenter, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Josien P W Pluim
- Center for Image Sciences, University Medical Center Utrecht, Utrecht, The Netherlands; Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands.
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Feng C, Zhu D, Zou X, Li A, Hu X, Li Z, Hu D. The combination of a reduction in contrast agent dose with low tube voltage and an adaptive statistical iterative reconstruction algorithm in CT enterography: Effects on image quality and radiation dose. Medicine (Baltimore) 2018; 97:e0151. [PMID: 29561422 PMCID: PMC5895339 DOI: 10.1097/md.0000000000010151] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
To investigate the subjective and quantitative image quality and radiation exposure of CT enterography (CTE) examination performed at low tube voltage and low concentration of contrast agent with adaptive statistical iterative reconstruction (ASIR) algorithm, compared with conventional CTE.One hundred thirty-seven patients with suspected or proved gastrointestinal diseases underwent contrast enhanced CTE in a multidetector computed tomography (MDCT) scanner. All cases were assigned to 2 groups. Group A (n = 79) underwent CT with low tube voltage based on patient body mass index (BMI) (BMI < 23 kg/m, 80 kVp; BMI ≥ 23 kg/m, 100 kVp) and low concentration of contrast agent (270 mg I/mL), the images were reconstructed with standard filtered back projection (FBP) algorithm and 50% ASIR algorithm. Group B (n = 58) underwent conventional CTE with 120 kVp and 350 mg I/mL contrast agent, the images were reconstructed with FBP algorithm. The computed tomography dose index volume (CTDIvol), dose length product (DLP), effective dose (ED), and total iodine dosage were calculated and compared. The CT values, contrast-to-noise ratio (CNR), and signal-to-noise ratio (SNR) of the normal bowel wall, gastrointestinal lesions, and mesenteric vessels were assessed and compared. The subjective image quality was assessed independently and blindly by 2 radiologists using a 5-point Likert scale.The differences of values for CTDIvol (8.64 ± 2.72 vs 11.55 ± 3.95, P < .001), ED (6.34 ± 2.24 vs 8.52 ± 3.02, P < .001), and DLP (422.6 ± 149.40 vs 568.30 ± 213.90, P < .001) were significant between group A and group B, with a reduction of 25.2%, 25.7%, and 25.7% in group A, respectively. The total iodine dosage in group A was reduced by 26.1%. The subjective image quality did not differ between the 2 groups (P > .05) and all image quality scores were greater than or equal to 3 (moderate). Fifty percent ASIR-A group images provided lower image noise, but similar or higher quantitative image quality in comparison with FBP-B group images.Compared with the conventional protocol, CTE performed at low tube voltage, low concentration of contrast agent with 50% ASIR algorithm produce a diagnostically acceptable image quality with a mean ED of 6.34 mSv and a total iodine dose reduction of 26.1%.
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Arena F, Irrera P, Consolino L, Colombo Serra S, Zaiss M, Longo DL. Flip-angle based ratiometric approach for pulsed CEST-MRI pH imaging. J Magn Reson 2018; 287:1-9. [PMID: 29272735 DOI: 10.1016/j.jmr.2017.12.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 11/14/2017] [Accepted: 12/09/2017] [Indexed: 06/07/2023]
Abstract
Several molecules have been exploited for developing MRI pH sensors based on the chemical exchange saturation transfer (CEST) technique. A ratiometric approach, based on the saturation of two exchanging pools at the same saturation power, or by varying the saturation power levels on the same pool, is usually needed to rule out the concentration term from the pH measurement. However, all these methods have been demonstrated by using a continuous wave saturation scheme that limits its translation to clinical scanners. This study shows a new ratiometric CEST-MRI pH-mapping approach based on a pulsed CEST saturation scheme for a radiographic contrast agent (iodixanol) possessing a single chemical exchange site. This approach is based on the ratio of the CEST contrast effects at two different flip angles combinations (180°/360° and 180°/720°), keeping constant the mean irradiation RF power (Bavg power). The proposed ratiometric approach index is concentration independent and it showed good pH sensitivity and accuracy in the physiological range between 6.0 and 7.4.
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Affiliation(s)
- Francesca Arena
- Dipartimento di Biotecnologie Molecolari e Scienze per la Salute, Università degli Studi di Torino, Torino, Italy
| | - Pietro Irrera
- Dipartimento di Biotecnologie Molecolari e Scienze per la Salute, Università degli Studi di Torino, Torino, Italy
| | - Lorena Consolino
- Dipartimento di Biotecnologie Molecolari e Scienze per la Salute, Università degli Studi di Torino, Torino, Italy
| | | | - Moritz Zaiss
- Department of High-field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Tübingen, Germany
| | - Dario Livio Longo
- Dipartimento di Biotecnologie Molecolari e Scienze per la Salute, Università degli Studi di Torino, Torino, Italy; Consiglio Nazionale delle Ricerche (CNR), Istituto di Biostrutture e Bioimmagini, Torino, Italy.
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Rayamajhi S, Balachandran A, Katz M, Reddy A, Rohren E, Bhosale P. Utility of (18) F-FDG PET/CT and CECT in conjunction with serum CA 19-9 for detecting recurrent pancreatic adenocarcinoma. Abdom Radiol (NY) 2018; 43:505-513. [PMID: 28900703 DOI: 10.1007/s00261-017-1316-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
PURPOSE The roles of different cross-sectional imaging in evaluating the recurrence of pancreatic adenocarcinoma are not well established. We evaluated the utility of 18F-fluorodeoxyglucose (FDG) positron emission tomography (PET)/computed tomography (CT) and contrast-enhanced computed tomography (CECT) in the diagnosis of recurrent pancreatic adenocarcinoma in conjunction with the tumor marker CA 19-9. METHODS We retrospectively reviewed the records of patients who underwent CECT and FDG PET/CT along with serum CA 19-9 measurement as a follow-up or on a clinical suspicion of recurrent disease after initial surgery for pancreatic adenocarcinoma. Two observers blinded to the other imaging modality results retrospectively reviewed and interpreted the images in consensus using a three-point scale (negative, equivocal, or positive). Pathologic analysis by biopsy or further clinical and radiologic follow-up determined the true status of the suspected recurrences. The imaging results were compared with CA 19-9 levels and true disease status. RESULTS Thirty-nine patients were included in the study. Thirty-three patients (85%) had proven recurrent cancer and six patients (15%) had no evidence of disease. Twenty-four patients had elevated CA 19-9 and 15 patients had normal CA 19-9. Sensitivity, specificity, and accuracy for recurrence were 90.9%, 100.0%, and 92.3% for PET/CT and 72.2%, 66.6%, and 71.7% for CECT, respectively. Sensitivity for locoregional recurrence was 94.4% for PET/CT but only 61.1% for CECT. PET/CT detected recurrence in 12 patients who had normal levels of CA 19-9. PET/CT showed lesions not visible on CECT in five (15%) patients. Although the sensitivity and specificity of PET/CT were higher than those of CECT, they were not statistically significant (p = 0.489 and p = 0.1489, respectively). CONCLUSION FDG PET/CT has a high sensitivity for pancreatic cancer recurrence. Normal CA 19-9 does not necessarily exclude these recurrences. FDG PET/CT is useful when CECT is equivocal and can detect recurrence in patients with normal CA 19-9.
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Affiliation(s)
| | - Aparna Balachandran
- Department of Diagnostic Radiology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Unit 38, Houston, TX, 77030, USA
| | - Mathew Katz
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Arun Reddy
- Department of Diagnostic Radiology, Baylor College of Medicine, Houston, TX, USA
| | - Eric Rohren
- Department of Nuclear Medicine, Medanta Hospital, Irba, Ranchi, India
| | - Priya Bhosale
- Department of Diagnostic Radiology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Unit 38, Houston, TX, 77030, USA.
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Kraus SJ, Levitt MA, Peña A. Augmented-pressure distal colostogram: the most important diagnostic tool for planning definitive surgical repair of anorectal malformations in boys. Pediatr Radiol 2018; 48:258-269. [PMID: 28840291 DOI: 10.1007/s00247-017-3962-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Revised: 07/11/2017] [Accepted: 08/09/2017] [Indexed: 11/25/2022]
Abstract
There is little current literature on the augmented-pressure distal colostogram, the single most important diagnostic study performed in boys with imperforate anus prior to definitive repair. Accurate understanding of the anatomy of the anorectal malformation including an associated fistulous communication between the rectum and the urogenital tract is essential for optimal surgical management. Specifically, the position of the rectal pouch and recto-urinary fistula relative to posterior sagittal structures of the perineum, especially the sacral spine, dictates the operative approach. This pictorial essay is a guide for those who encounter such children with relative infrequency to become more comfortable with the technique. We report how to perform this radiologic exam and the potential pitfalls from our experience of performing the technique in our large pediatric colorectal practice.
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Affiliation(s)
- Steven J Kraus
- Department of Radiology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave., Cincinnati, OH, 45229, USA.
- Departments of Radiology and Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA.
| | - Marc A Levitt
- Center for Colorectal and Pelvic Reconstruction, Nationwide Children's Hospital, Columbus, OH, USA
- Departments of Surgery and Pediatrics, College of Medicine, The Ohio State University, Columbus, OH, USA
| | - Alberto Peña
- International Center for Colorectal Care, Children's Hospital Colorado, Aurora, CO, USA
- Department of Surgery, University of Colorado, Anschutz Medical Campus, Aurora, CO, USA
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Abstract
This case report presents three cases of Meigs' syndrome: a benign ovarian tumor with ascites and a hydrothorax. After removal of the ovarian tumor, the symptoms resolved and the patients became asymptomatic. In daily practice, Meigs' syndrome is at first sight often mistaken for ovarian cancer. With this case report we would like to emphasize that the clinical presentation of an ovarian tumor might be ovarian cancer, but can masquerade as something uncommon like Meigs' syndrome. In a time span of two years we encountered three cases.
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Affiliation(s)
- Kim E Kortekaas
- Department of Obstetrics and Gynecology, Haaglanden Medical Center, The Hague, The Netherlands
| | - Harold Mp Pelikan
- Department of Obstetrics and Gynecology, Haaglanden Medical Center, The Hague, The Netherlands
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Budoff MJ, Li D, Kazerooni EA, Thomas GS, Mieres JH, Shaw LJ. Diagnostic Accuracy of Noninvasive 64-row Computed Tomographic Coronary Angiography (CCTA) Compared with Myocardial Perfusion Imaging (MPI): The PICTURE Study, A Prospective Multicenter Trial. Acad Radiol 2017; 24:22-29. [PMID: 27771227 DOI: 10.1016/j.acra.2016.09.008] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Revised: 09/05/2016] [Accepted: 09/14/2016] [Indexed: 11/15/2022]
Abstract
RATIONALE AND OBJECTIVES Although multiple studies have shown excellent accuracy statistics for noninvasive angiography by coronary computed tomographic angiography (CCTA), most studies comparing nuclear imaging to CCTA were performed on patients already referred for cardiac catheterization, introducing referral and selection bias. This prospective trial evaluated the diagnostic accuracy of 64-row CCTA to detect obstructive coronary stenosis compared to myocardial perfusion imaging (MPI), using quantitative coronary angiography (QCA) as a reference standard. MATERIALS AND METHODS Twelve sites prospectively enrolled 230 patients (49% male, 57.8 years) with chest pain. All patients underwent MPI and CCTA (Lightspeed VCT/Visipaque 320, GE Healthcare, Milwaukee, WI, USA) prior to invasive coronary angiography (ICA). All patients were evaluated, and those found to have either an abnormal MPI or CCTA were clinically referred for ICA. CCTAs were graded on a 15-segment American Heart Association model by three blinded readers for presence of obstructive stenosis (>50% or >70%); MPI was graded by two blinded readers using a 17-segment model for estimation of the % myocardium ischemic or with stress defects. ICAs were independently graded for % stenosis by QCA. The efficacies of MPI and CCTA were assessed including all vessel segments for per-patient and per-vessel analyses. RESULTS The prevalence of stenosis ≥50% by ICA was 52.1% (25 of 48). The sensitivity of CCTA was significantly higher than nuclear imaging (92.0% vs 54.5%, P < 0.001), with similar specificity (87.0% vs 78.3%) when obstructive disease was defined as ≥50%. CCTA provided superior sensitivity (92.6% vs 59.3%, P < 0.001) and similar specificity (88.9% vs 81.5%) using QCA stenosis ≥70%. For ≥50% stenosis, the computed tomographic angiography odds ratio for ICA disease was 51.75 (95% CI = 8.50-314.94, P < 0.001). For summed stress score ≥5%, the odds ratio for ICA CAD was 12.73 (95% CI = 2.43-66.55, P < 0.001). Using receiver operating characteristic curve analysis, CCTA was better at classifying obstructive coronary artery disease when compared to MPI (area = 0.85 vs 0.71, P < 0.0001). CONCLUSIONS This study represents one of the first prospective multicenter, controlled clinical trials comparing 64-row CCTA to MPI in the same patients, demonstrating superior diagnostic accuracy of CCTA over myocardial perfusion single photon emission computed tomography (MPS) to reliably detect >50% and >70% stenosis in stable chest pain patients.
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Affiliation(s)
- Matthew J Budoff
- Los Angeles Biomedical Research Institute, 1124 W Carson Street, Torrance 90502, California.
| | - Dong Li
- Los Angeles Biomedical Research Institute, 1124 W Carson Street, Torrance 90502, California
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Lee JK, Towbin AJ. Currarino Syndrome and the Effect of a Large Anterior Sacral Meningocele on Distal Colostogram in an Anorectal Malformation. J Radiol Case Rep 2016; 10:16-21. [PMID: 27761181 DOI: 10.3941/jrcr.v10i6.2068] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Currarino syndrome is a congenital disorder, consisting of a triad of anomalies including an anorectal malformation, sacral anomaly, and a presacral mass. Anterior sacral meningoceles are the most common presacral mass. A young child presented to our institution with an unrepaired anorectal malformation and a large anterior sacral meningocele. We describe how the anterior meningocele affected the imaging work-up.
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Affiliation(s)
- Jason K Lee
- Department of Radiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Alexander J Towbin
- Department of Radiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
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López-Coria M, Sánchez-Nieto S. Trichoderma asperellum Induces Maize Seedling Growth by Activating the Plasma Membrane H +-ATPase. Mol Plant Microbe Interact 2016; 29:797-806. [PMID: 27643387 DOI: 10.1094/mpmi-07-16-0138-r] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Although Trichoderma spp. have beneficial effects on numerous plants, there is not enough knowledge about the mechanism by which they improves plant growth. In this study, we evaluated the participation of plasma membrane (PM) H+-ATPase, a key enzyme involved in promoting cell growth, in the elongation induced by T. asperellum and compared it with the effect of 10 μM indol acetic acid (IAA) because IAA promotes elongation and PM H+-ATPase activation. Two seed treatments were tested: biopriming and noncontact. In neither were the tissues colonized by T. asperellum; however, the seedlings were longer than the control seedlings, which also accumulated IAA and increased root acidification. An auxin transport inhibitor (2,3,5 triiodobenzoic acid) reduced the plant elongation induced by Trichoderma spp. T. asperellum seed treatment increased the PM H+-ATPase activity in plant roots and shoots. Additionally, the T. asperellum extracellular extract (TE) activated the PM H+-ATPase activity of microsomal fractions of control plants, although it contained 0.3 μM IAA. Furthermore, the mechanism of activation of PM H+-ATPase was different for IAA and TE; in the latter, the activation depends on the phosphorylation state of the enzyme, suggesting that, in addition to IAA, T. asperellum excretes other molecules that stimulate PM H+-ATPase to induce plant growth.
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Affiliation(s)
- M López-Coria
- 1 Departamento de Bioquímica, Facultad de Química, Conjunto E. Universidad Nacional Autónoma de México, Cd. Universitaria, Coyoacán. México 04510, D.F., México; and
| | - S Sánchez-Nieto
- 1 Departamento de Bioquímica, Facultad de Química, Conjunto E. Universidad Nacional Autónoma de México, Cd. Universitaria, Coyoacán. México 04510, D.F., México; and
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van den Hoven AF, Prince JF, de Keizer B, Vonken EJPA, Bruijnen RCG, Verkooijen HM, Lam MGEH, van den Bosch MAAJ. Use of C-Arm Cone Beam CT During Hepatic Radioembolization: Protocol Optimization for Extrahepatic Shunting and Parenchymal Enhancement. Cardiovasc Intervent Radiol 2016; 39:64-73. [PMID: 26067803 PMCID: PMC4689758 DOI: 10.1007/s00270-015-1146-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2015] [Accepted: 05/02/2015] [Indexed: 12/17/2022]
Abstract
PURPOSE To optimize a C-arm computed tomography (CT) protocol for radioembolization (RE), specifically for extrahepatic shunting and parenchymal enhancement. MATERIALS AND METHODS A prospective development study was performed per IDEAL recommendations. A literature-based protocol was applied in patients with unresectable and chemorefractory liver malignancies undergoing an angiography before radioembolization. Contrast and scan settings were adjusted stepwise and repeatedly reviewed in a consensus meeting. Afterwards, two independent raters analyzed all scans. A third rater evaluated the SPECT/CT scans as a reference standard for extrahepatic shunting and lack of target segment perfusion. RESULTS Fifty scans were obtained in 29 procedures. The first protocol, using a 6 s delay and 10 s scan, showed insufficient parenchymal enhancement. In the second protocol, the delay was determined by timing parenchymal enhancement on DSA power injection (median 8 s, range 4-10 s): enhancement improved, but breathing artifacts increased (from 0 to 27 %). Since the third protocol with a 5 s scan decremented subjective image quality, the second protocol was deemed optimal. Median CNR (range) was 1.7 (0.6-3.2), 2.2 (-1.4-4.0), and 2.1 (-0.3-3.0) for protocol 1, 2, and 3 (p = 0.80). Delineation of perfused segments was possible in 57, 73, and 44 % of scans (p = 0.13). In all C-arm CTs combined, the negative predictive value was 95 % for extrahepatic shunting and 83 % for lack of target segment perfusion. CONCLUSION An optimized C-arm CT protocol was developed that can be used to detect extrahepatic shunts and non-perfusion of target segments during RE.
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Affiliation(s)
- Andor F van den Hoven
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, Room E.01.132, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands.
| | - Jip F Prince
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, Room E.01.132, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
| | - Bart de Keizer
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, Room E.01.132, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
| | - Evert-Jan P A Vonken
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, Room E.01.132, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
| | - Rutger C G Bruijnen
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, Room E.01.132, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
| | - Helena M Verkooijen
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, Room E.01.132, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
| | - Marnix G E H Lam
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, Room E.01.132, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
| | - Maurice A A J van den Bosch
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, Room E.01.132, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
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Kang H, Chung YS, Kim SW, Choi GJ, Kim BG, Park SW, Seok JW, Hong J. Effect of Temperature-Sensitive Poloxamer Solution/Gel Material on Pericardial Adhesion Prevention: Supine Rabbit Model Study Mimicking Cardiac Surgery. PLoS One 2015; 10:e0143359. [PMID: 26580394 PMCID: PMC4651345 DOI: 10.1371/journal.pone.0143359] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Accepted: 11/03/2015] [Indexed: 11/19/2022] Open
Abstract
Objective We investigated the mobility of a temperature-sensitive poloxamer/Alginate/CaCl2 mixture (PACM) in relation to gravity and cardiac motion and the efficacy of PACM on the prevention of pericardial adhesion in a supine rabbit model. Methods A total of 50 rabbits were randomly divided into two groups according to materials applied after epicardial abrasion: PACM and dye mixture (group PD; n = 25) and saline as the control group (group CO; n = 25). In group PD, rabbits were maintained in a supine position with appropriate sedation, and location of mixture of PACM and dye was assessed by CT scan at the immediate postoperative period and 12 hours after surgery. The grade of adhesions was evaluated macroscopically and microscopically two weeks after surgery. Results In group PD, enhancement was localized in the anterior pericardial space, where PACM and dye mixture was applied, on immediate post-surgical CT scans. However, the volume of the enhancement was significantly decreased at the anterior pericardial space 12 hours later (P < .001). Two weeks after surgery, group PD had significantly lower macroscopic adhesion score (P = .002) and fibrosis score (P = .018) than did group CO. Inflammation score and expression of anti-macrophage antibody in group PD were lower than those in group CO, although the differences were not significant. Conclusions In a supine rabbit model study, the anti-adhesion effect was maintained at the area of PACM application, although PACM shifted with gravity and heart motion. For more potent pericardial adhesion prevention, further research and development on the maintenance of anti-adhesion material position are required.
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Affiliation(s)
- Hyun Kang
- Department of Anesthesiology and Pain Medicine, Chung-Ang University College of Medicine, Seoul, Korea
- Department of Thoracic and Cardiovascular Surgery, Chung-Ang University College of Medicine, Seoul, Korea
| | - Yoon Sang Chung
- Heart Research Institute, Chung-Ang University College of Medicine, Seoul, Korea
- Department of Thoracic and Cardiovascular Surgery, Chung-Ang University College of Medicine, Seoul, Korea
| | - Sang Wook Kim
- Heart Research Institute, Chung-Ang University College of Medicine, Seoul, Korea
- Department of Internal Medicine, Chung-Ang University College of Medicine, Seoul, Korea
| | - Geun Joo Choi
- Department of Anesthesiology and Pain Medicine, Chung-Ang University College of Medicine, Seoul, Korea
| | - Beom Gyu Kim
- Department of Surgery, Chung-Ang University College of Medicine, Seoul, Korea
| | - Suk Won Park
- Department of Radiation Oncology, Chung-Ang University College of Medicine, Seoul, Korea
| | - Ju Won Seok
- Department of Nuclear Medicine, Chung-Ang University College of Medicine, Seoul, Korea
| | - Joonhwa Hong
- Heart Research Institute, Chung-Ang University College of Medicine, Seoul, Korea
- Department of Thoracic and Cardiovascular Surgery, Chung-Ang University College of Medicine, Seoul, Korea
- * E-mail:
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Abstract
OBJECTIVE The mechanisms of contrast-induced nephropathy are not fully understood and sensitive biomarkers of contrast-induced nephropathy are yet to be found. We investigated whether urinary fibrinogen could be a potential biomarker for contrast-induced nephropathy. METHODS To create a contrast-induced nephropathy model, mice received a prostaglandin synthesis inhibitor (indomethacin) and a nitric oxide synthase inhibitor (Nω-Nitro-L-arginine methyl ester) intraperitoneally followed by a different dose of iodixanol. In the control group, normal saline was administered. Urinary fibrinogen and serum creatinine were analyzed using enzyme-linked immunosorbent assay. Kidneys were used to quantify fibrinogen using qRT-PCR and Western blot and for histopathological examination. RESULTS Histopathological examination demonstrated mild renal injury in the low-dose group, and moderate renal injury in the high-dose group. Urinary fibrinogen levels were significantly increased in an iodixanol dose-dependent manner (control vs. low-dose group, P < 0.05; control vs. high-dose group P < 0.01). Serum creatinine levels were only increased in the high-dose group (P < 0.01 compared to control), but not in the low-dose group. For fibrinogen-gene expression, in the low-dose group, Fgγ increased (qRT-PCR, Western blot, P < 0.05) in the high-dose group, Fgβ and Fgγ decreased (qRT-PCR, P < 0.01; Western blot, P < 0.05), and Fgα increased (qRT-PCR, P < 0.05; Western blot, P < 0.05). CONCLUSIONS We propose that urinary fibrinogen could be used as a potential biomarker for early contrast-induced nephropathy diagnosis.
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Affiliation(s)
- Luyu Yao
- Department of Surgery, Louisiana State University Health Sciences Center, Shreveport, Louisiana, USA
| | - Honglin Dong
- Departments of Vascular Surgery, Second Hospital, Shanxi Medical University, Taiyuan, China
| | - Cynthia X Zhao
- Department of Pathology, Louisiana State University Health Sciences Center, Shreveport, Louisiana, USA
| | - Xin Gu
- Department of Pathology, Louisiana State University Health Sciences Center, Shreveport, Louisiana, USA
| | - Tze-W Tan
- Department of Surgery, Louisiana State University Health Sciences Center, Shreveport, Louisiana, USA
| | - Alireza Hamidian Jahromi
- Department of Surgery, Louisiana State University Health Sciences Center, Shreveport, Louisiana, USA
| | - Wayne W Zhang
- Department of Surgery, Louisiana State University Health Sciences Center, Shreveport, Louisiana, USA
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Han L, Yin W, Lyu B, Li N, Hou Z, Jiang S. [Application feasibility of low tube voltage and lower iodine concentration contrast medium as well as iterative reconstruction in coronary computed tomography angiography]. Zhonghua Xin Xue Guan Bing Za Zhi 2015; 43:234-238. [PMID: 26269342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE To investigate the feasibility of using lower iodine concentration (270 mgI/ml) contrast medium, lower X-ray tube voltage (100 kVp) and iterative reconstruction (IR) to reduce both iodine load and radiation dose but keep the image quality of coronary CT angiography (CCTA). METHODS A total of 80 consecutive patients with suspected coronary artery disease were prospectively assigned to one of two groups via computer central system from January to May 2013. The control group (n = 40) was scanned using dual-source CCTA protocols of 120 kV, 370 mgI/ml Iopromide and filtered back projection reconstruction with a vascular algorithm (B26f). The study group (n = 40) was scanned using 100 kV, 270 mgI/ml Iodixanol and sinogram affirmed iterative reconstruction with a vascular algorithm (I26f). Other scan parameters and contrast injection protocol were similar between the two groups. Attenuation in the ascending aorta and coronary arteries along with image noise were measured. Images were reconstructed, measured and graded, and iodine load and effective radiation dose were calculated. RESULTS The body mass index ((25.3 ± 3.0) kg/m² vs. (25.4 ± 3.0)kg/m², P = 0.852), image quality scores (4.70 ± 0.52 vs. 4.63 ± 0.59, P = 0.545), mean signal-to-noise ratios (22.2 ± 5.5 vs. 23.6 ± 5.8, P = 0.277), and contrast-to-noise ratios (35.6 ± 17.6 vs. 41.1 ± 17.6, P = 0.163) were similar between the control group and study group. Mean iodine loads were significantly reduced in the study group ((18.49 ± 0.75)g) compared to control group ((25.27 ± 0.94)g), P< 0.001). Mean effective radiation doses were also significantly reduced in the study group ((2.31 ± 0.73) mSv) compared to that in control group ((3.52 ± 1.16) mSv), P< 0.001). CONCLUSION Use of low X-ray tube voltage and iterative reconstruction allows lower iodine load and effective radiation dose application at CCTA without image quality reduction.
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Affiliation(s)
- Lei Han
- Department of Radiology, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - Weihua Yin
- Department of Radiology, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - Bin Lyu
- Department of Radiology, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China;
| | - Nan Li
- Department of Radiology, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - Zhihui Hou
- Department of Radiology, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - Shiliang Jiang
- Department of Radiology, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
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Ahn YH, Koh YI, Kim JH, Ban GY, Lee YK, Hong GN, Jin UR, Choi BJ, Shin YS, Park HS, Ye YM. The potential utility of iodinated contrast media (ICM) skin testing in patients with ICM hypersensitivity. J Korean Med Sci 2015; 30:245-51. [PMID: 25729245 PMCID: PMC4330477 DOI: 10.3346/jkms.2015.30.3.245] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Accepted: 10/16/2014] [Indexed: 11/20/2022] Open
Abstract
Both immediate and delayed hypersensitivity reactions to iodinated contrast media (ICM) are relatively common. However, there are few data to determine the clinical utility of immunologic evaluation of ICM. To evaluate the utility of ICM skin testing in patients with ICM hypersensitivity, 23 patients (17 immediate and 6 delayed reactions) were enrolled from 3 university hospitals in Korea. With 6 commonly used ICM including iopromide, iohexol, ioversol, iomeprol, iopamidol and iodixanol, skin prick (SPT), intradermal (IDT) and patch tests were performed. Of 10 patients with anaphylaxis, 3 (30.0%) and 6 (60.0%) were positive respectively on SPTs and IDTs with the culprit ICM. Three of 6 patients with urticaria showed positive IDTs. In total, 11 (64.7%) had positive on either SPT or IDT. Three of 6 patients with delayed rashes had positive response to patch test and/or delayed IDT. Among 5 patients (3 anaphylaxis, 1 urticaria and 1 delayed rash) taken subsequent radiological examinations, 3 patients administered safe alternatives according to the results of skin testing had no adverse reaction. However, anaphylaxis developed in the other 2 patients administered the culprit ICM again. With 64.7% (11/17) and 50% (3/6) of the sensitivities of corresponding allergic skin tests with culprit ICM for immediate and delayed hypersensitivity reactions, the present study suggests that skin tests is useful for the diagnosis of ICM hypersensitivity and for selecting safe ICM and preventing a recurrence of anaphylaxis caused by the same ICM.
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Affiliation(s)
- Young-Hwan Ahn
- Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Korea
| | - Young-Il Koh
- Department of Allergy, Asthma and Clinical Immunology, Chonnam National University Medical School, Gwangju, Korea
| | - Joo-Hee Kim
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - Ga-Young Ban
- Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Korea
| | - Yeon-Kyung Lee
- Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Korea
| | - Ga-Na Hong
- Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Korea
| | - U-Ram Jin
- Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Korea
| | - Byung-Joo Choi
- Department of Cardiology, Ajou University School of Medicine, Suwon, Korea
| | - Yoo-Seob Shin
- Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Korea
| | - Hae-Sim Park
- Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Korea
| | - Young-Min Ye
- Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Korea
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Pieri S, Di Felice M, Moreschi E, Damiani P, Marasca E, Agresti P, Sessa B, Trinci M, Menichini G, Di Giampietro I, Miele V. Transbrachial approach to the treatment of uterine leiomyomas with embolization of the uterine arteries: a preliminary technical experience. Radiol Med 2015; 120:759-66. [PMID: 25656038 DOI: 10.1007/s11547-015-0498-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Accepted: 01/05/2015] [Indexed: 11/25/2022]
Abstract
INTRODUCTION Uterine leiomyomas are benign tumours; recently they have been managed with embolization of the uterine arteries. We analysed the technical feasibility, safety and efficacy of this treatment performed via an innovative transbrachial approach, rather than the traditional transfemoral approach. MATERIALS AND METHODS Between 2009 and 2013, 115 patients were treated with embolization of the uterine arteries for one or more symptomatic leiomyomas. In 20 of these 115 patients, a transbrachial approach was used. Under ultrasound guidance, the left brachial artery was punctured. After having placed the tip of the angiography catheter at the level of L4 to check the aortic bifurcation, the uterine arteries were catheterised and embolized with calibrated particles. Data concerning exposure to radiation and the duration of the intervention were recorded for comparison between the two groups of subjects. Clinical controls and magnetic resonance imaging were complemented with echo-colour Doppler of the brachial artery to confirm the integrity and function of the vessel. RESULTS The uterine arteries were catheterised easily in a mean time of 25″, compared to 72″ using the femoral approach. As far as exposure to radiation was concerned, the mean fluoroscopy time for the femoral approach was 21.7' [range 14.4-42.7'] compared to 17.6' [range 7.7-25.5'] for the transbrachial approach. The time of occupation of the angiography suite was 118' (range 95-155') with the femoral approach, compared to 92' (range 65-123') with the transbrachial approach. No immediate complications involving the brachial artery were recorded. DISCUSSION In the treatment of symptomatic uterine fibromas, embolization of the uterine arteries performed via a transbrachial approach was shown to be safe and technically valid with regard to reducing the overall time of the intervention, ease of selective catheterisation, and shorter times spent in hospital, as well as being better accepted by patients.
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Affiliation(s)
- Stefano Pieri
- , c/o MAZZONE, V.F.Algarotti, n° 8, 00137, Rome, Italy,
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Raman SP, Chen Y, Schroeder JL, Huang P, Fishman EK. CT texture analysis of renal masses: pilot study using random forest classification for prediction of pathology. Acad Radiol 2014; 21:1587-96. [PMID: 25239842 DOI: 10.1016/j.acra.2014.07.023] [Citation(s) in RCA: 118] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 07/16/2014] [Accepted: 07/26/2014] [Indexed: 02/06/2023]
Abstract
RATIONALE AND OBJECTIVES Computed tomography texture analysis (CTTA) allows quantification of heterogeneity within a region of interest. This study investigates the possibility of distinguishing between several common renal masses using CTTA-derived parameters by developing and validating a predictive model. MATERIALS AND METHODS CTTA software was used to analyze 20 clear cell renal cell carcinomas (RCCs), 20 papillary RCCs, 20 oncocytomas, and 20 renal cysts. Regions of interest were drawn around each mass on multiple slices in the arterial, venous, and delayed phases on renal mass protocol CT scans. Unfiltered images and spatial band-pass filtered images were analyzed to quantify heterogeneity. Random forest method was used to construct a predictive model to classify lesions using quantitative parameters. The model was externally validated on a separate set of 19 unknown cases. RESULTS The random forest model correctly categorized oncocytomas in 89% of cases (sensitivity = 89%, specificity = 99%), clear cell RCCs in 91% of cases (sensitivity = 91%, specificity = 97%), cysts in 100% of cases (sensitivity = 100%, specificity = 100%), and papillary RCCs in 100% of cases (sensitivity = 100%, specificity = 98%). CONCLUSIONS CTTA, in conjunction with random forest modeling, demonstrates promise as a tool to characterize lesions. Various renal masses were accurately classified using quantitative information derived from routine scans.
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Affiliation(s)
- Siva P Raman
- Department of Radiology, JHOC 3251, Johns Hopkins University, 601 N. Caroline Street, Baltimore, MD 21287.
| | - Yifei Chen
- Department of Radiology, JHOC 3251, Johns Hopkins University, 601 N. Caroline Street, Baltimore, MD 21287
| | - James L Schroeder
- Department of Radiology, JHOC 3251, Johns Hopkins University, 601 N. Caroline Street, Baltimore, MD 21287
| | - Peng Huang
- Biostatistics and Bioinformatics Division, Department of Oncology, Johns Hopkins University, Baltimore, Maryland
| | - Elliot K Fishman
- Department of Radiology, JHOC 3251, Johns Hopkins University, 601 N. Caroline Street, Baltimore, MD 21287
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Wang T, Tao H, Han C, Wang P, Bai F, Zhang J. [Preliminary study on CT retrograde intubation dacryosystography (CT-RIDC) and its impact factors]. Zhonghua Yan Ke Za Zhi 2014; 50:766-771. [PMID: 25547580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE To observe practicality and safety of CT-RIDC for the patients with presaccular lacrimal obstruction and study the related factors. To provide guidance for the diagnosis and treatment of the patients with presaccular lacrimal obstruction. METHODS Fifty-four patients (75 eyes) with presaccular lacrimal obstruction, including 3 cases (5 eyes) of upper and lower lacrimal punctum atresia, 15 cases (24 eyes) of superior and inferior canalicular obstruction, 18 cases (28 eyes) of common canaliculus obstruction, 18 cases (18 eyes) of old laceration of superior and inferior canalicular, were recruited. All patients underwent the examination by using 0° and 30° ear endoscope and the imaging characteristics of the inferior orifice of nasolacrimal duct were obtained. Fifty-three cases (65 eyes) with the opening inferior orifice were randomly divided into four groups (15 eyes, 17 eyes, 17 eyes, 16 eyes) according to different angle of head hypsokinesis in the supine position. The OM lines back along the sagittal plane of the head back 10°, 20°, 30°, 40° were measured. The angles of head hypsokinesis were set in accordance with the OM line measurement results.Intubation was successful when the intubation guided needle within the set of epidural anesthetic catheter aided with endoscopy was inserted into the inferior orifice of nasolacrimal duct and then the epidural anesthetic catheter was inserted into the lacrimal duct 6 mm. The angle (θ) between the long axis of the curved part of the intubation guided needle and the long axis of the guided needle was measured. The numbers of intubation success cases in each group were recorded.χ² test was used to compare intubation success rate under the different angle of head hypsokinesis.Scheffe method was used to compare intubation success rate between each group. Contrast medium was then injected into lacrimal duct through the epidural anesthetic catheter for patients with successful intubation and CT scan was carried out. 3D model of lacrimal passage was reconstructed with CT axial scanning. RESULTS The intubation guided needle was successfully inserted into the inferior orifice of nasolacrimal duct in 44 eyes among 65 eyes with the opening orifice. The number of successful intubation cases were 4 eyes, 15 eyes, 13 eyes, 12 eyes and the intubation success rate was 26.67%, 88.24%, 76.74%, 75.00% according the angle of head hypsokinesis 10° group (15 eyes), 20° group (17 eyes), 30° group (17 eyes), 40° group (16 eyes). The intubation success rate of head hypsokinesis 10° group was significantly lower than that of the other groups. Multiple Comparison by Scheffe Test demonstrated that there was a remarkable difference (P < 0.05) in the intubation success rate between head hypsokinesis 10° group and the other three groups. There were no significant differences in the intubation success rate among head hypsokinesis 20° group, head hypsokinesis 30° group and head hypsokinesis 40° group. The mean of θ was 108° with a range of 93.2°-120.5° by measuring the angle θ of the successful intubation cases. According to the frequency distribution plot, most θ was in 104°-115°. The successful intubation cases (44 eyes) underwent CT scan in the same position immediately after injected contrast medium (Optiray) through the epidural anesthetic catheter. CT images of 28 eyes showed retained contrast medium in the nasolacrimal duct and lacrimal sac. The findings from CT-DCG images were basically agreed with the operation. CONCLUSIONS CD-RIDC may apply to pre-operative examination for the patients with the opening orifice and presaccular lacrimal obstruction.It provideed imaging evidence for diagnosis and therapy and it was safe and practical. Many factors could affect CD-RIDC. The main verified facors were the shape of the inferior orifice of nasolacrimal duct, head position of the patient and the bending angle of the tip of intubation guided needle.
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Affiliation(s)
- Tingting Wang
- Lacrimal Center of Ophthalmology, Armed Police General Hospital of China, Beijing 100039, China
| | - Hai Tao
- Lacrimal Center of Ophthalmology, Armed Police General Hospital of China, Beijing 100039, China.
| | - Cui Han
- Lacrimal Center of Ophthalmology, Armed Police General Hospital of China, Beijing 100039, China
| | - Peng Wang
- Lacrimal Center of Ophthalmology, Armed Police General Hospital of China, Beijing 100039, China
| | - Fang Bai
- Lacrimal Center of Ophthalmology, Armed Police General Hospital of China, Beijing 100039, China
| | - Jian Zhang
- Lacrimal Center of Ophthalmology, Armed Police General Hospital of China, Beijing 100039, China
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Stojanovska J, Cronin P, Gross BH, Kazerooni EA, Tsodikov A, Frank L, Oral H. Left atrial function and maximum volume as determined by MDCT are independently associated with atrial fibrillation. Acad Radiol 2014; 21:1162-71. [PMID: 25022763 DOI: 10.1016/j.acra.2014.02.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Revised: 01/18/2014] [Accepted: 02/12/2014] [Indexed: 01/13/2023]
Abstract
RATIONALE AND OBJECTIVES To assess whether left atrial (LA) volume, function, and diameter as determined by multidetector computed tomography (MDCT) are associated with the presence and chronicity of atrial fibrillation (AF). MATERIALS AND METHODS A total of 232 subjects, 156 with AF (43 with chronic and 113 with paroxysmal) and 76 normal subjects, formed the study population. AF subjects underwent MDCT of the pulmonary veins and LA, and normal subjects underwent coronary computed tomography (CT), on which LA volume, function, and diameter were measured. Associations between each MDCT LA parameter and presence and chronicity of AF were assessed using logistic regression analysis. RESULTS The indexed LA maximum volume (odds ratio [OR]=2.42; 95% confidence interval [CI], 1.43-4.08; P=.0009) was significantly associated with chronicity and presence of AF (OR=1.06; 95% CI, 1.03-1.10; P=.0003) after adjustment for traditional risk factors. The LA function was associated with presence of AF (OR=0.93; 95% CI, 0.89-0.97; P=.0005), but not with AF chronicity (OR=1.12; 95% CI, 0.93-1.33; P=.21). CONCLUSIONS Decreased LA function is associated with presence of AF, and increased LA maximum volume is associated with presence and chronicity of AF, independent of traditional risk factors.
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Affiliation(s)
- Jadranka Stojanovska
- Department of Radiology, University of Michigan Hospitals, B1 132H Taubman, Center/5302, 1500 E. Medical Center Drive, Ann Arbor, MI, 48109-5302.
| | - Paul Cronin
- Division of Cardiothoracic Radiology, Department of Radiology, University of Michigan Health System, Ann Arbor, Michigan
| | - Barry H Gross
- Division of Cardiothoracic Radiology, Department of Radiology, University of Michigan Health System, Ann Arbor, Michigan
| | - Ella A Kazerooni
- Division of Cardiothoracic Radiology, Department of Radiology, University of Michigan Health System, Ann Arbor, Michigan
| | - Alex Tsodikov
- Department of Biostatistics, School of Public Health, University of Michigan, Ann Arbor, Michigan
| | - Luba Frank
- Division of Cardiothoracic Radiology, Department of Radiology, University of Michigan Health System, Ann Arbor, Michigan
| | - Hakan Oral
- Division of Cardiovascular Medicine, Department of Internal Medicine, Cardiovascular Center, University of Michigan Health System, Ann Arbor, Michigan
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Yao L, Dai Z, Ding F, Zhu J, Yan L, Chen F. [Low concentration of iodixanol used in CT angiography of lower extremity arteriosclerosis obliterans]. Zhonghua Yi Xue Za Zhi 2014; 94:2256-2259. [PMID: 25391866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE To evaluate the clinical diagnostic value of low concentration of iodixanol used in CT angiography (CTA) of lower extremity arteriosclerosis obliterans (LEASO). METHODS 42 patients which were suspect diagnosed with LEASO were divided to A group (270 mgI/ml iodixanol, tube voltage 100 kV) and B group (350 mgI/ml iohexol, tube voltage 120 kV), 21 patients in each group. Measure the body mass index (BMI) before the CTA of lower extremity. CTA results were analyzed with the digital subtraction angiography (DSA) as the "gold standard". RESULTS There were no statistical difference of age, gender, BMI and CT value of the bifurcation of profunda femoral artery and superficial femoral artery, upper segment of anterior tibial artery and posterior tibial artery between A and B group. The diagnostic sensitivity and specificity of A and B groups of CTA were 97.0%, 99.1% and 98.3%, 99.5% for occlusion. Regard artery more than moderate stenosis (include moderate stenosis) as the overall statistics, the diagnostic sensitivity and specificity of A and B groups of CTA were 99.2%, 99.3% and 99.1%, 99.3%, the accuracy were 92.9% and 93.0%, the positive predictive and negative predictive value were 96.9%, 99.3% and 96.6%, 99.3%, respectively. The kappa value of A and B groups of CTA and DSA consistency test were 0.930 and 0.927, respectively. CONCLUSION The CTA with low concentration of iodixanol combine with low tube voltage can achieve superior conventional scanning imaging features, and has great clinical value in the diagnosis of LEASO, also is an effective method for the inspection, evaluation and follow-up.
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Affiliation(s)
- Lizheng Yao
- Department of Radiology, the Affiliated Yancheng Hospital of Southeast University Medical College, Yancheng 224001, China
| | - Zhenyu Dai
- Department of Radiology, the Affiliated Yancheng Hospital of Southeast University Medical College, Yancheng 224001, China.
| | - Fuwan Ding
- Department of Radiology, the Affiliated Yancheng Hospital of Southeast University Medical College, Yancheng 224001, China
| | - Jun Zhu
- Department of Radiology, the Affiliated Yancheng Hospital of Southeast University Medical College, Yancheng 224001, China
| | - Lihui Yan
- Department of Radiology, the Affiliated Yancheng Hospital of Southeast University Medical College, Yancheng 224001, China
| | - Fei Chen
- Department of Radiology, the Affiliated Yancheng Hospital of Southeast University Medical College, Yancheng 224001, China
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Wu Y, Zheng M, Zhao H, Li J, Wei M, Liu Y, Shi M, Huan Y. [Low-concentration contrast material for dual-source computed tomography coronary angiography by a combination of iterative reconstruction and low-tube-voltage technique: feasibility study]. Zhonghua Yi Xue Za Zhi 2014; 94:2260-2263. [PMID: 25391867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE To assess the impact of low concentration contrast media on the degree of vascular enhancement, image quality and radiation dose in coronary CT angiography (cCTA) studies when using a combination of iterative reconstruction and low tube voltage. METHODS 120 patients who underwent cCTA were randomly divided into two groups. The patients in group A received iopromide 370 were scanned using the conventional tube output, and images were reconstructed using filtered back projection (FBP). The patients in group B received iodixanol 270 were scanned using the low tube output, and images were reconstructed using iterative reconstruction technique (SAFIRE, Siemens Healthcare). CT attenuation was measured in the coronary arteries, great arteries, interventricular septum and left ventricular cavity. Noise, subjective image quality scores and effective radiation dose were compared between the two groups. RESULTS There was no significant difference in the mean CT attenuation achieved, image noise and mean image quality score at each anatomic site between iomeprol 270 group and iopromide 370 group. The effective radiation dose were 0.44 ± 0.25 mSv and 0.94 ± 0.42 mSv for iomeprol 270 and iopromide 370 in low weight subgroups, and 1.17 ± 0.30 mSv and 2.37 ± 0.66 mSv in high weight subgroups, respectively, reflecting dose savings of 53.2% (P < 0.01) and 50.6% (P < 0.01), respectively. CONCLUSION The results demonstrate that with a combination of iterative reconstruction and a low tube voltage , a low iodine concentration of 270 mgI/ml still improves the contrast enhancement without impairing image quality, as well as significantly lowers effective radiation dose.
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Affiliation(s)
- Yongjie Wu
- Department of Radiology, Xijing Hospital, Affiliated to the Fourth Military Medical University, Xi'an 710032, China
| | - Minwen Zheng
- Department of Radiology, Xijing Hospital, Affiliated to the Fourth Military Medical University, Xi'an 710032, China.
| | - Hongliang Zhao
- Department of Radiology, Xijing Hospital, Affiliated to the Fourth Military Medical University, Xi'an 710032, China
| | - Jian Li
- Department of Radiology, Xijing Hospital, Affiliated to the Fourth Military Medical University, Xi'an 710032, China
| | - Menggqi Wei
- Department of Radiology, Xijing Hospital, Affiliated to the Fourth Military Medical University, Xi'an 710032, China
| | - Ying Liu
- Department of Radiology, Xijing Hospital, Affiliated to the Fourth Military Medical University, Xi'an 710032, China
| | - Mingguo Shi
- Department of Radiology, Xijing Hospital, Affiliated to the Fourth Military Medical University, Xi'an 710032, China
| | - Yi Huan
- Department of Radiology, Xijing Hospital, Affiliated to the Fourth Military Medical University, Xi'an 710032, China
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Zaheer A, Haider M, Kawamoto S, Hruban RH, Fishman EK. Dual-phase CT findings of groove pancreatitis. Eur J Radiol 2014; 83:1337-43. [PMID: 24935140 PMCID: PMC4316673 DOI: 10.1016/j.ejrad.2014.05.019] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 05/09/2014] [Accepted: 05/11/2014] [Indexed: 01/23/2023]
Abstract
PURPOSE Groove pancreatitis is a rare focal form of chronic pancreatitis that occurs in the pancreaticoduodenal groove between the major and minor papillae, duodenum and pancreatic head. Radiologic appearance and clinical presentation can result in suspicion of malignancy rendering pancreaticoduodenectomy inevitable. This study reports dual phase CT findings in a series of 12 patients with pathology proven groove pancreatitis. MATERIALS AND METHODS Retrospective review of preoperative CT findings in 12 patients with histologically proven groove pancreatitis after pancreaticoduodenectomy. Size, location, attenuation, presence of mass or cystic components in the pancreas, groove and duodenum, calcifications, duodenal stenosis and ductal changes were recorded. Clinical data, laboratory values, endoscopic ultrasonographic and histopathological findings were collected. RESULTS Soft tissue thickening in the groove was seen in all patients. Pancreatic head, groove and duodenum were all involved in 75% patients. A discrete lesion in the pancreatic head was seen in half of the patients, most of which appeared hypodense on both arterial and venous phases. Cystic changes in pancreatic head were seen in 75% patients. Duodenal involvement was seen in 92% patients including wall thickening and cyst formation. The main pancreatic duct was dilated in 7 patients, with an abrupt cut off in 3 and a smooth tapering stricture in 4. Five patients had evidence of chronic pancreatitis with parenchymal calcifications. CONCLUSION Presence of mass or soft tissue thickening in the groove with cystic duodenal thickening is highly suggestive of groove pancreatitis. Recognizing common radiological features may help in diagnosis and reduce suspicion of malignancy.
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Affiliation(s)
- Atif Zaheer
- The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins Medical Institutions, Baltimore, MD 21231, United States; Pancreatitis Center, Division of Gastroenterology, Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, MD 21231, United States.
| | - Maera Haider
- The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins Medical Institutions, Baltimore, MD 21231, United States.
| | - Satomi Kawamoto
- The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins Medical Institutions, Baltimore, MD 21231, United States.
| | - Ralph H Hruban
- Department of Pathology, The Sol Goldman Pancreatic Cancer Research Center, the Johns Hopkins University School of Medicine, Baltimore, MD 21231, United States.
| | - Elliot K Fishman
- The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins Medical Institutions, Baltimore, MD 21231, United States.
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Mogabgab O, Patel VG, Michael TT, Kotsia A, Christopoulos G, Banerjee S, Brilakis ES. Impact of contrast agent viscosity on coronary balloon deflation times: bench testing results. J Interv Cardiol 2014; 27:177-81. [PMID: 24450393 PMCID: PMC3976709 DOI: 10.1111/joic.12097] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
OBJECTIVES To assess the impact of viscosity on angioplasty balloon deflation times. BACKGROUND Lower contrast viscosity could result in more rapid coronary balloon deflation times. METHODS We performed a bench comparison of coronary balloon deflation times using 2 contrast agents with different viscosity (ioxaglate and iodixanol), 3 contrast dilutions, and 2 inflation syringe filling volumes. Ten identical pairs of coronary angioplasty balloons were used to conduct each comparison after balloon inflation to 12 atmospheres. Simultaneous deflations were performed under cineangiography. The time to full contrast extraction and the area of contrast remaining after 5 seconds of deflation (quantified by opaque pixel count) were compared between groups. RESULTS The mean time to full contrast extraction during balloon deflation was 8.3 ± 2.5 seconds for ioxaglate (lower viscosity) versus 10.1 ± 2.9 seconds for iodixanol (higher viscosity) (17.4% decrease, P = 0.005), with a 35.6% (P = 0.004) reduction in contrast area at 5 seconds. Compared to 1:1 ioxaglate-saline mixture, 1:2 and 1:3 ioxaglate/saline mixes resulted in 26.7% (P < 0.001) and 39.0% (P < 0.001) reduction in mean balloon deflation time, respectively, but at the expense of decreased balloon opacity. Filling the inflation syringe with 5 versus 15 ml of contrast/saline solution was associated with 7.5% decrease in balloon deflation time (P = 0.005), but no difference in contrast area at 5 seconds (P = 0.749). CONCLUSIONS Use of a lower viscosity contrast agent and higher contrast dilution significantly reduced coronary balloon deflation times, whereas use of lower syringe filling volume had a modest effect. Rapid coronary balloon deflation could improve the safety of interventional procedures.
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Affiliation(s)
- Owen Mogabgab
- VA North Texas Healthcare System and University of Texas Southwestern Medical Center, Dallas, Texas
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