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Xiong G, Tao L, Ma WJ, Gong MJ, Zhao L, Shen LJ, Long CL, Zhang DY, Zhang YY, Wei GH. Urine-derived stem cells for the therapy of diabetic nephropathy mouse model. Eur Rev Med Pharmacol Sci 2021; 24:1316-1324. [PMID: 32096161 DOI: 10.26355/eurrev_202002_20189] [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] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Diabetic nephropathy (DN) is one of the most representative diabetic microangiopathy complications. So far, there have been no satisfactory therapeutic strategies, and the injection of stem cells provides a target for DN therapy. PATIENTS AND METHODS Urine-derived stem cells (USCs) were obtained from 9 healthy men. 24 mice were randomly and equally divided into control group, DN model group, DN+hUSC group (treated with USCs for 3 times). Hematoxylin-eosin (HE) and Masson staining were used to detect histological changes of kidney injury. Creatinine and blood urea nitrogen (BUN) were measured to assess renal function. Besides, myofibroblast accumulation, macrophage infiltration, cell proliferation, and oxidative stress were detected by immunohistochemical analysis. RESULTS Compared with DN model group, DN+hUSC group showed lower function loss, cell infiltration, and oxidative stress, as well as less renal fibrosis, histological damage, and cell proliferation. CONCLUSIONS USC can alleviate inflammation and oxidative stress, reduce renal interstitial fibrosis, improve renal tissue structure and protect renal function through paracrine effect.
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Affiliation(s)
- G Xiong
- Department of Urology; Chongqing Key Laboratory of Children Urogenital Development and Tissue Engineering; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders; Chongqing Key Laboratory of Pediatrics; Children's Hospital of Chongqing Medical University, Chongqing, China.
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Kong M, Lu Z, Zhong C, Gao Q, Zhou X, Chen R, Xiong G, Hao L, Yang X, Yang N. A higher level of total bile acid in early mid-pregnancy is associated with an increased risk of gestational diabetes mellitus: a prospective cohort study in Wuhan, China. J Endocrinol Invest 2020; 43:1097-1103. [PMID: 32086784 DOI: 10.1007/s40618-020-01196-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [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: 11/15/2019] [Accepted: 02/06/2020] [Indexed: 12/12/2022]
Abstract
PURPOSE To assess the longitudinal associations between maternal total bile acid (TBA) levels during early mid-pregnancy and the subsequent risk of gestational diabetes mellitus (GDM). METHODS In a prospective cohort study, pregnant women who were enrolled prior to gestational week 16 were followed until delivery. TBA levels were tested during weeks 14-18 of gestation. Using logistic regression, we analyzed the associations between quartiles of TBA and GDM based on a 75-g oral glucose tolerance test (OGTT) at 24-28 gestational weeks. RESULTS The GDM rate was 7.9% (114/1441). The mean TBA level was higher in women with GDM than in those without GDM (2.1 ± 2.0 vs 1.5 ± 1.0 µmol/L, P = 0.000). The highest TBA level quartile (2.1-10.7 µmol/L) had a 1.78-fold (95% CI 1.01, 3.14) increased risk of GDM compared with that of the lowest quartile (0.0-0.8 µmol/L) after adjusting for pre-pregnancy body mass index (BMI), gestational, age at TBA test and other confounders. High TBA levels were involved in the fasting glucose level rather than that at 1 h and 2 h after OGTT in all participants. CONCLUSIONS Pregnant women with higher serum TBA levels during early mid-pregnancy have a higher risk of developing GDM. TBA may be a new risk factor for GDM.
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Affiliation(s)
- M Kong
- Department of Medical Laboratory, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430014, Hubei, China
| | - Z Lu
- Department of Medical Laboratory, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430014, Hubei, China
| | - C Zhong
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, MOE Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, 430030, Hubei, China
| | - Q Gao
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, MOE Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, 430030, Hubei, China
| | - X Zhou
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, MOE Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, 430030, Hubei, China
| | - R Chen
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, MOE Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, 430030, Hubei, China
| | - G Xiong
- Department of Obstetrics, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430014, Hubei, China
| | - L Hao
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, MOE Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, 430030, Hubei, China
| | - X Yang
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, MOE Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, 430030, Hubei, China
| | - N Yang
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, MOE Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, 430030, Hubei, China.
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Yang P, Xiong G, He YK, You LX, Ren BY, Sun YG. Novel Zn and Cd Coordination Polymers Assembled from Imidazole-based Zwitterionic Ligands: Synthesis, Crystal Structures, and Luminescence Properties. RUSS J COORD CHEM+ 2019. [DOI: 10.1134/s1070328419100087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Huang H, Xiong G, Shen P, Cao Z, Zheng L, Zhang T, Zhao Y. MicroRNA-1285 inhibits malignant biological behaviors of human pancreatic cancer cells by negative regulation of YAP1. Neoplasma 2019; 64:358-366. [PMID: 28253715 DOI: 10.4149/neo_2017_306] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Pancreatic ductal adenocarcinoma is a most deadly malignancy, with a 5-year survival rate of ~7%. Chemotherapy is the main treatment strategy of this disease. However, the high rate of resistance to chemotherapeutic agent contributes to poor prognosis. MicroRNAs are essential for the initiation, progression and chemoresistance of human malignancies. Previous studies have shown that miRNA-1285 participates in renal cell carcinoma and hepatocellular carcinoma. However, its roles in pancreatic ductal adenocarcinoma are poorly understood. In this study, we confirmed that miR-1285 was significantly down-regulated in gemcitabine-resistant pancreatic cancer cell lines by qRT-PCR. We found that miR-1285 suppressed cell proliferation as well as increased the sensitivity of PDAC cells to gemcitabine by CCK8 assays in vitro. Results from transwell assay indicated that miR-1285 inhibited pancreatic cancer cell migration and invasion. Experiments using different cell lines got identical results. All those results demonstrated that miR-1285 act as tumor suppressor of pancreatic cancer. To our knowledge, this study is the first to elucidate the function of miR-1285 in pancreatic cancer. Western blotting analysis verified that miR-1285 negatively regulated YAP1 protein level, together with EGFR and β-catenin. YAP1 is a known oncoprotein of pancreatic cancer. As silencing of YAP1 activity might be beneficial in cancer prevention and treatment, our results suggest that miR-1285 might serve as a novel therapeutic target for miRNA-based therapy in pancreatic cancer. Further research elucidating the exact mechanisms of miRNA-1285 function and the correlation between miR-1285 levels in tissues or serum and clinical characteristics of pancreatic cancer is needed later.
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Lu D, Liu X, Feng S, Dong X, Shi X, Ji X, Fang T, Wang Z, Hong Z, Ye Y, Ren P, Diao D, Wu H, Xiong G, Wang H, Li M, Cai K. IDENTIFICATION OF THE RELATIVELY FIXED INTRATHORACIC ANATOMICAL LANDMARKS FOR ESOPHAGEAL SEGMENTATION: A CROSS-SECTIONAL SURVEY FROM SOUTHERN CHINA. Chest 2019. [DOI: 10.1016/j.chest.2019.02.139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Otton J, Li Z, Koh E, Adams D, Mok K, Harvey M, Ling S, Sungala N, Moylan E, Ng W, Xiong G, Juergens C, Delaney G. Establishment of a Cardio-Oncology Service for Assessment and Management of Acute and Late Cardiovascular Conditions. Heart Lung Circ 2019. [DOI: 10.1016/j.hlc.2019.06.379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Affiliation(s)
- G Xiong
- 1 Department of Hand Surgery, Beijing Jishuitan Hospital, Beijing, China
| | - Z R Xiao
- 1 Department of Hand Surgery, Beijing Jishuitan Hospital, Beijing, China.,2 Department of Orthopaedic Surgery, PLA 91st Central Hospital, Jiaozuo, China
| | - W G Zhang
- 3 Department of anatomy and histology, Peking University Health Science Center, Beijing, China
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Zwergal A, Günther L, Brendel M, Beck R, Lindner S, Xiong G, Eilles E, Unterrainer M, Albert N, Becker-Bense S, Ziegler S, la Fougere C, Bartenstein P, Brandt T, Dieterich M. P 61 Glial activation accelerates behavioural compensation of acute unilateral vestibulopathy. Clin Neurophysiol 2017. [DOI: 10.1016/j.clinph.2017.06.137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Xiong G, Sun P, Zhou H, Ha S, Hartaigh BO, Truong QA, Min JK. Comprehensive Modeling and Visualization of Cardiac Anatomy and Physiology from CT Imaging and Computer Simulations. IEEE Trans Vis Comput Graph 2017; 23:1014-1028. [PMID: 26863663 PMCID: PMC4975682 DOI: 10.1109/tvcg.2016.2520946] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
In clinical cardiology, both anatomy and physiology are needed to diagnose cardiac pathologies. CT imaging and computer simulations provide valuable and complementary data for this purpose. However, it remains challenging to gain useful information from the large amount of high-dimensional diverse data. The current tools are not adequately integrated to visualize anatomic and physiologic data from a complete yet focused perspective. We introduce a new computer-aided diagnosis framework, which allows for comprehensive modeling and visualization of cardiac anatomy and physiology from CT imaging data and computer simulations, with a primary focus on ischemic heart disease. The following visual information is presented: (1) Anatomy from CT imaging: geometric modeling and visualization of cardiac anatomy, including four heart chambers, left and right ventricular outflow tracts, and coronary arteries; (2) Function from CT imaging: motion modeling, strain calculation, and visualization of four heart chambers; (3) Physiology from CT imaging: quantification and visualization of myocardial perfusion and contextual integration with coronary artery anatomy; (4) Physiology from computer simulation: computation and visualization of hemodynamics (e.g., coronary blood velocity, pressure, shear stress, and fluid forces on the vessel wall). Substantially, feedback from cardiologists have confirmed the practical utility of integrating these features for the purpose of computer-aided diagnosis of ischemic heart disease.
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Abstract
Seventeen fresh lunates with stage III Kienböck's disease were scanned with micro-computed tomography. Four regions of interest were selected to measure trabecular parameters, which were compared with those from normal lunates. Within the three regions in the distal surface, there was more compact trabecular bone in the middle region when compared with the palmar and dorsal regions. In the central part, the trabeculae of the Kienböck's lunates were much thicker than those in normal lunates. The diameters of the palmar nutrient foramina of the Kienböck's lunates were significantly smaller than those in normal lunates. In affected lunates, the bony disruptions were mostly located in the palmar or dorsal areas, which were shown from trabecular bone structure analysis to be structurally weaker. This leads to separation of the distal part of the fractured bone, disruption of the blood supply, poor bone remodelling and proneness to secondary fracture and eventual collapse.
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Affiliation(s)
- G Xiong
- 1 Department of Hand Surgery, Beijing Jishuitan Hospital, Beijing, China
| | - Z Xiao
- 1 Department of Hand Surgery, Beijing Jishuitan Hospital, Beijing, China
| | - H Wang
- 1 Department of Hand Surgery, Beijing Jishuitan Hospital, Beijing, China
| | - S Guo
- 2 Department of Trauma & Orthopaedic Surgery, Lister Hospital, Stevenage, UK
| | - J Tao
- 1 Department of Hand Surgery, Beijing Jishuitan Hospital, Beijing, China
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Xiong G, Xiao Z. The magnetic resonance imaging appearances in Kienböck's disease. J Hand Surg Eur Vol 2017; 42:91-92. [PMID: 27561300 DOI: 10.1177/1753193416664491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- G Xiong
- Department of Hand Surgery, Beijing Jishuitan Hospital, Beijing, China
| | - Z Xiao
- Department of Hand Surgery, Beijing Jishuitan Hospital, Beijing, China
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King M, Xiong G, Maxim P, Diehn M, Loo B, Xing L. Vesselness-Based Deformable Registration Algorithms Can Reduce Landmark Errors in the Registration of Pulmonary Computed Tomography Images Before and After Radiation Therapy. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Zhou H, Sun P, Ha S, Lundine D, Xiong G. Watertight modeling and segmentation of bifurcated Coronary arteries for blood flow simulation using CT imaging. Comput Med Imaging Graph 2016; 53:43-53. [DOI: 10.1016/j.compmedimag.2016.06.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Revised: 04/27/2016] [Accepted: 06/07/2016] [Indexed: 12/13/2022]
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Becker-Bense S, Stephan T, Albert N, Brendel M, Unterrainer M, Xiong G, Mille E, Habs M, Herz M, Schwaiger M, Dieterich M, Bartenstein P. EP 30. Hybrid-H215O-PET-fMRI measures during galvanic vestibular stimulation. Clin Neurophysiol 2016. [DOI: 10.1016/j.clinph.2016.05.085] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Xiong G, Xiao Z, Wang H, Guo S, Tao J. Microstructural study of the lunate in stage III Kienböck's disease with micro-computed tomography imaging. J Hand Surg Eur Vol 2016. [PMID: 27561299 DOI: 10.1177/1753193416664502.] [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] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Seventeen fresh lunates with stage III Kienböck's disease were scanned with micro-computed tomography. Four regions of interest were selected to measure trabecular parameters, which were compared with those from normal lunates. Within the three regions in the distal surface, there was more compact trabecular bone in the middle region when compared with the palmar and dorsal regions. In the central part, the trabeculae of the Kienböck's lunates were much thicker than those in normal lunates. The diameters of the palmar nutrient foramina of the Kienböck's lunates were significantly smaller than those in normal lunates. In affected lunates, the bony disruptions were mostly located in the palmar or dorsal areas, which were shown from trabecular bone structure analysis to be structurally weaker. This leads to separation of the distal part of the fractured bone, disruption of the blood supply, poor bone remodelling and proneness to secondary fracture and eventual collapse.
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Affiliation(s)
- G Xiong
- 1 Department of Hand Surgery, Beijing Jishuitan Hospital, Beijing, China
| | - Z Xiao
- 1 Department of Hand Surgery, Beijing Jishuitan Hospital, Beijing, China
| | - H Wang
- 1 Department of Hand Surgery, Beijing Jishuitan Hospital, Beijing, China
| | - S Guo
- 2 Department of Trauma & Orthopaedic Surgery, Lister Hospital, Stevenage, UK
| | - J Tao
- 1 Department of Hand Surgery, Beijing Jishuitan Hospital, Beijing, China
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Fang D, Seisen T, Yang K, Liu P, Fan X, Singla N, Xiong G, Zhang L, Li X, Zhou L. A systematic review and meta-analysis of oncological and renal function outcomes obtained after segmental ureterectomy versus radical nephroureterectomy for upper tract urothelial carcinoma. Eur J Surg Oncol 2016; 42:1625-1635. [PMID: 27612412 DOI: 10.1016/j.ejso.2016.08.008] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 08/03/2016] [Accepted: 08/06/2016] [Indexed: 12/26/2022] Open
Abstract
OBJECTIVE To perform a systematic review and meta-analysis of the comparative studies reporting oncological and renal function outcomes of segmental ureterectomy (SU) versus radical nephroureterectomy (RNU) for upper tract urothelial carcinomas (UTUC). MATERIALS AND METHODS A literature search on Pubmed, Embase, and the Cochrane library was conducted according to the PRISMA guidelines, and a meta-analysis was performed to assess cancer-specific survival (CSS), overall survival (OS), recurrence-free survival (RFS), intravesical recurrence free survival (IVRFS) and surgery-related variations in estimated glomerular filtration rate (eGFR). RESULTS A total of 11 retrospective studies with 3963 patients who underwent either SU (n = 983; 24.8%) or RNU (n = 2980; 75.2%) were included. Although patients treated with SU were more likely to be diagnosed with favorable pathological features, the meta-analysis of unadjusted data revealed no significant difference between both groups in terms of CSS (HR 0.90, p = 0.33) and OS (HR 0.98, p = 0.93). Accordingly, the meta-analysis of adjusted data confirmed equivalent CSS (HR = 0.90, p = 0.47) between SU and RNU. Similarly, no significant difference was found in terms of RFS (HR 1.06, p = 0.72) and IVRFS (HR 1.35, p = 0.39). However, a significant decreased risk of impaired renal function was observed after SU when compared to RNU (mean eGFR difference = 9.32 ml/1.73 m2, p = 0.007). CONCLUSION Although adverse patient and tumor characteristics were not equally balanced between treatment arms, our systematic review and meta-analysis supports similar oncological outcomes between SU and RNU, with better preservation of renal function after SU. As such, SU should be preferably used as the first-line treatment for low-risk ureter tumors, while considered for selected cases of high-risk disease.
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Affiliation(s)
- D Fang
- Department of Urology, Peking University First Hospital, Institute of Urology, Peking University, National Urological Cancer Centre, No. 8 Xishiku St, Xicheng District, Beijing 100034, China
| | - T Seisen
- Academic Department of Urology, Pitié Salpétrière Hospital, APHP, 47-83 Boulevard de l'Hôpital, Paris F-75013, France; UPMC University Paris 06, GRC5, ONCOTYPE-Uro, Institut Universitaire de Cancérologie, Paris F-75005, France
| | - K Yang
- Department of Urology, Peking University First Hospital, Institute of Urology, Peking University, National Urological Cancer Centre, No. 8 Xishiku St, Xicheng District, Beijing 100034, China
| | - P Liu
- Department of Urology, Peking University First Hospital, Institute of Urology, Peking University, National Urological Cancer Centre, No. 8 Xishiku St, Xicheng District, Beijing 100034, China
| | - X Fan
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, No.107 Yanjiang West Rd, Yuexiu District, Guangzhou 510120, China
| | - N Singla
- Department of Urology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390, USA
| | - G Xiong
- Department of Urology, Peking University First Hospital, Institute of Urology, Peking University, National Urological Cancer Centre, No. 8 Xishiku St, Xicheng District, Beijing 100034, China
| | - L Zhang
- Department of Urology, Peking University First Hospital, Institute of Urology, Peking University, National Urological Cancer Centre, No. 8 Xishiku St, Xicheng District, Beijing 100034, China
| | - X Li
- Department of Urology, Peking University First Hospital, Institute of Urology, Peking University, National Urological Cancer Centre, No. 8 Xishiku St, Xicheng District, Beijing 100034, China.
| | - L Zhou
- Department of Urology, Peking University First Hospital, Institute of Urology, Peking University, National Urological Cancer Centre, No. 8 Xishiku St, Xicheng District, Beijing 100034, China
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Abstract
Background The aim of this study was to investigate the impact of varying hemodynamic conditions on fractional flow reserve (ratio of pressure distal [Pd] and proximal [Pa] to stenosis under hyperemia) in an in vitro setting. Failure to achieve maximal hyperemia and the choice of hyperemic agents may have differential effects on coronary hemodynamics and, consequently, on the determination of fractional flow reserve. Methods and Results An in vitro flow system was developed to experimentally model the physiological coronary circulation as flow‐dependent stenosis resistance in series with variable downstream resistance. Five idealized models with 30% to 70% diameter stenosis severity were fabricated using VeroClear rigid material in an Objet260 Connex printer. Mean aortic pressure was maintained at 7 levels (60–140 mm Hg) from hypotension to hypertension using a needle valve that mimicked adjustable microcirculatory resistance. A range of physiological flow rates was applied by a steady flow pump and titrated by a flow sensor. The pressure drop and the pressure ratio (Pd/Pa) were assessed for the 7 levels of aortic pressure and differing flow rates. The in vitro experimental data were coupled with pressure–flow relationships from clinical data for populations with and without myocardial infarction, respectively, to evaluate fractional flow reserve. The curve for pressure ratio and flow rate demonstrated a quadratic relationship with a decreasing slope. The absolute decrease in fractional flow reserve in the group without myocardial infarction (with myocardial infarction) was on the order of 0.03 (0.02), 0.05 (0.02), 0.07 (0.05), 0.17 (0.13) and 0.20 (0.24), respectively, for 30%, 40%, 50%, 60%, and 70% diameter stenosis, for an increase in aortic pressure from 60 to 140 mm Hg. Conclusions The fractional flow reserve value, an index of physiological stenosis significance, was observed to decrease with increasing aortic pressure for a given stenosis in this idealized in vitro experiment for vascular groups with and without myocardial infarction.
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Affiliation(s)
- Kranthi K Kolli
- Dalio Institute of Cardiovascular Imaging, Weill Cornell Medical College, New York, NY
| | - James K Min
- Dalio Institute of Cardiovascular Imaging, Weill Cornell Medical College, New York, NY Departments of Radiology and Medicine, Weill Cornell Medical College, New York, NY
| | - Seongmin Ha
- Dalio Institute of Cardiovascular Imaging, Weill Cornell Medical College, New York, NY
| | - Hilary Soohoo
- Dalio Institute of Cardiovascular Imaging, Weill Cornell Medical College, New York, NY
| | - Guanglei Xiong
- Dalio Institute of Cardiovascular Imaging, Weill Cornell Medical College, New York, NY
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Zhao W, Xing L, Zhang Q, Xiong G, Min J. SU-F-I-41: Calibration-Free Material Decomposition for Dual-Energy CT. Med Phys 2016. [DOI: 10.1118/1.4955869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Han D, Lee JH, Rizvi A, Elmore K, Gransar H, Hartaigh BO, Lin F, Min J, Xiong G. INCREMENTAL ROLE OF RESTING MYOCARDIAL COMPUTED TOMOGRAPHY PERFUSION FOR PREDICTING PHYSIOLOGICALLY SIGNIFICANT CORONARY ARTERY DISEASE: A MACHINE LEARNING METHOD APPROACH. J Am Coll Cardiol 2016. [DOI: 10.1016/s0735-1097(16)31672-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Tan D, Tong XL, Hu H, Wu SY, Li CL, Xiong G, Xiang ZH, Dai FY, Lu C. Morphological characterization and molecular mapping of an irradiation-induced Speckled mutant in the silkworm, Bombyx mori. Insect Mol Biol 2016; 25:93-104. [PMID: 26661290 DOI: 10.1111/imb.12205] [Citation(s) in RCA: 6] [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] [Indexed: 06/05/2023]
Abstract
Speckled (Spc), an X-ray-induced lethal mutant of Bombyx mori, exhibits a mosaic dark-brown-spotted larval epidermis in both sexes and egg-laying problems only in females. Here, we report the morphological characterization and molecular mapping of the Spc mutant. Morphological investigations revealed that the epidermal ultrastructure of the small, dark-brown spots was more dense than that of the white regions in both Spc/+ mutants and wild type, and that the lethality of the Spc/Spc mutants occurred during early embryogenesis. Furthermore, the ovarioles and ovipositor were disconnected in approximately 85.5% of Spc/+ females, a further 2.5% had a connection between the ovarioles and ovipositor that was too narrow to lay eggs. The remaining females showed a normal connection similar to that of the wild type. We successfully narrowed down the location of the Spc mutation to a region on chromosome 4 that was ∼1041 kb long. Gene-prediction analysis identified 25 candidate genes in this region. Chromosome structure analysis indicated that a ∼305 kb deletion was included in the mapping region. Temporal and spatial reverse transcription PCR (RT-PCR) analysis showed that several genes in the mapped region are associated with the Spc mutant. Although the genes responsible for the Spc mutation were not definitively identified, our results further the current understanding of the complex mechanism underlying the multiple morphological defects in Spc mutants.
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Affiliation(s)
- D Tan
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
- Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing, China
| | - X-L Tong
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
- Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing, China
| | - H Hu
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
- Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing, China
| | - S-Y Wu
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
- Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing, China
| | - C-L Li
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
- Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing, China
| | - G Xiong
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
- Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing, China
| | - Z-H Xiang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
- Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing, China
| | - F-Y Dai
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
- Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing, China
| | - C Lu
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
- Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry, Southwest University, Chongqing, China
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Zhao W, Niu T, Xing L, Xie Y, Xiong G, Elmore K, Zhu J, Wang L, Min JK. Using edge-preserving algorithm with non-local mean for significantly improved image-domain material decomposition in dual-energy CT. Phys Med Biol 2016; 61:1332-51. [DOI: 10.1088/0031-9155/61/3/1332] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Luo Y, Feng J, Xu M, Zhou J, Min JK, Xiong G. Registration of coronary arteries in computed tomography angiography images using Hidden Markov Model. Annu Int Conf IEEE Eng Med Biol Soc 2016; 2015:1993-6. [PMID: 26736676 DOI: 10.1109/embc.2015.7318776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Computed tomography angiography (CTA) allows for not only diagnosis of coronary artery disease (CAD) with high spatial resolution but also monitoring the remodeling of vessel walls in the progression of CAD. Alignment of coronary arteries in CTA images acquired at different times (with a 3-7 years interval) is required to visualize and analyze the geometric and structural changes quantitatively. Previous work in image registration primarily focused on large anatomical structures and leads to suboptimal results when applying to registration of coronary arteries. In this paper, we develop a novel method to directly align the straightened coronary arteries in the cylindrical coordinate system guided by the extracted centerlines. By using a Hidden Markov Model (HMM), image intensity information from CTA and geometric information of extracted coronary arteries are combined to align coronary arteries. After registration, the pathological features in two straightened coronary arteries can be directly visualized side by side by synchronizing the corresponding cross-sectional slices and circumferential rotation angles. By evaluating with manually labeled landmarks, the average distance error is 1.6 mm.
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Xiong G, Flynn TJ, Chen J, Trinkle C, Xu R. Development of an ex vivo breast cancer lung colonization model utilizing a decellularized lung matrix. Integr Biol (Camb) 2015; 7:1518-25. [PMID: 26563425 DOI: 10.1039/c5ib00157a] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The metastatic spread of cancer cells to distant sites represents the major cause of cancer-related deaths in breast cancer patients, and lungs are one of the most common sites for metastatic colonization. Developing a physiologically relevant tissue culture model to mimic lung colonization of breast cancer is crucial for the investigation of the biology of cancer metastasis and evaluation of drug treatment efficacy. Here, we describe an ex vivo lung colonization assay for breast cancer using the native three-dimensional (3D) lung extracellular matrix. The native matrix was isolated from murine lungs using a decellularization technique, and the preservation of extracellular matrix (ECM) composition, integrity and mechanical properties was confirmed. We showed that metastatic MDA-MB 231 and 4T1 cells invaded and colonized in the decellularized lung matrix, whereas only a small mass of non-metastatic MCF7 cells survived under the same condition. Furthermore, knockdown of ZEB1, an epithelial-mesenchymal transition (EMT) inducer, significantly reduced invasion and colonization of MDA-MB 231 cells in the decellularized lung, suggesting an important role of EMT in breast cancer metastasis. We conclude that the decellularized lung retains the biophysical and biochemical properties of the lung ECM and provides a powerful tool to investigate the lung colonization of breast cancer.
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Affiliation(s)
- G Xiong
- Markey Cancer Center, University of Kentucky, Lexington, KY 40536, USA
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Abstract
Introduction:
Recent advances in cardiac imaging permit detailed assessment of myocardial perfusion using Single Photon Emission Computed Tomography and integrated evaluation of coronary anatomy and myocardial perfusion using Computed Tomography [CT]. However, neither technique is adequate to evaluate coronary physiology on a per-vessel level, limiting diagnostic accuracy compared to invasive physiologic gold standards, e.g. fractional flow reserve (FFR). Recently, computational fluid dynamics (CFD) applied to CT imaging offers per-vessel hemodynamic analysis and has been shown to improve the diagnostic performance over CT alone compared to invasive FFR. In this study, we developed an alternative in-vitro method to quantify coronary hemodynamics in a 3D printed patient-specific geometry, replicating in-vivo physiologic conditions.
Hypothesis:
Our approach overcome inevitable numerical assumptions (rigid walls and unrealistic boundary conditions) made in CFD and can potentially lead to a more favorable diagnostic performance.
Methods:
In Figure 1, patient-specific replica was fabricated from segmented coronary arteries using high-resolution 3D printing. It was used to examine the hemodynamic variables (velocity, pressure and FFR) by a flow circulation system including a programmable flow pump, tunable flow impedances, pressure sensors, and particle image velocimetry.
Results:
Our initial experiments demonstrated the concordance of our in-vitro results to in in-vivo measurements. Instead of interrogating only one flow condition in CFD, our system allows for assessment of a given coronary lesion under a range of flow conditions from rest to maximal stress at no additional effort after initial setup.
Conclusions:
We expect our approach will provide a new competitive way to identify coronary lesion, and more importantly, the flow condition under which a given lesion becomes hemodynamically significant.
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Affiliation(s)
- Guanglei Xiong
- Radiology, Dalio Institute of Cardiovascular Imaging, NewYork-Presbyterian and the Weill Cornell Med College, New York, NY
| | - Kranthi Kolli
- Radiology, Dalio Institute of Cardiovascular Imaging, NewYork-Presbyterian and the Weill Cornell Med College, New York, NY
| | - Hilary A Soohoo
- Radiology, Dalio Institute of Cardiovascular Imaging, NewYork-Presbyterian and the Weill Cornell Med College, New York, NY
| | - James K Min
- Radiology, Dalio Institute of Cardiovascular Imaging, NewYork-Presbyterian and the Weill Cornell Med College, New York, NY
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25
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Lei Y, Chen M, Xiong G, Chen J. Influence of virtual intervention and blood rheology on mass transfer through thoracic aortic aneurysm. J Biomech 2015; 48:3312-22. [DOI: 10.1016/j.jbiomech.2015.06.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Revised: 05/13/2015] [Accepted: 06/15/2015] [Indexed: 10/23/2022]
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26
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Wang XQ, Zeng D, Ma X, Xiong G, Wang ZY, Sakamoto T. Isolation and characterization of novel polymorphic microsatellite loci in large yellow croaker (Larimichthys crocea). Genet Mol Res 2015; 14:9437-40. [PMID: 26345877 DOI: 10.4238/2015.august.14.7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The large yellow croaker (Larimichthys crocea) is one of the largest marine net-cage cultured species in the oceans around China. In the present study, we isolated and characterized 13 polymorphic microsatellite markers from genomic libraries of L. crocea. Loci were screened for 10 wild specimens from 2 sites in southeast of China. All loci were polymorphic. The number of alleles per locus ranged from 2 to 21. The expected heterozygosity ranged from 0.233 to 0.838 and observed heterozygosity ranged from 0.527 to 0.935. Eleven loci were highly informative (polymorphic information content >0.5). Significant deviation from Hardy-Weinberg equilibrium was observed at 3 loci after Bonferroni's correction. The microsatellite loci may be valuable tools for studying the genetic diversity and genetic structure for conservation planning of the fish.
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Affiliation(s)
- X Q Wang
- College of Animal Science and Technology, Collaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan Province, Hunan Agriculture University, Changsha, Hunan, China
| | - D Zeng
- College of Animal Science and Technology, Collaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan Province, Hunan Agriculture University, Changsha, Hunan, China
| | - X Ma
- College of Animal Science and Technology, Collaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan Province, Hunan Agriculture University, Changsha, Hunan, China
| | - G Xiong
- College of Animal Science and Technology, Collaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan Province, Hunan Agriculture University, Changsha, Hunan, China
| | - Z Y Wang
- College of Animal Science and Technology, Collaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan Province, Hunan Agriculture University, Changsha, Hunan, China
| | - T Sakamoto
- Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
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Becker-Bense S, Feuerecker R, Xiong G, Feil K, Bartenstein P, Strupp M, Dieterich M. P37. Effects of acetyl-dl-leucine on the cerebral activation pattern in cerebellar ataxia (FDG-PET study). Clin Neurophysiol 2015. [DOI: 10.1016/j.clinph.2015.04.175] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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28
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Schöberl F, Xiong G, Feil K, Bartenstein P, Fougere CL, Brandt T, Jahn K, Strupp M, Dieterich M, Zwergal A. V12. [18F]-FDG-PET imaging of the cerebral orthostatic tremor network during stance. Clin Neurophysiol 2015. [DOI: 10.1016/j.clinph.2015.04.090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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29
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Zwergal A, Günther L, Beck R, Xiong G, Eilles E, Lindner S, Bartenstein P, Fougere CL, Brandt T, Dieterich M. V30. In vivo imaging of cerebral glial activation after unilateral labyrinthectomy. Clin Neurophysiol 2015. [DOI: 10.1016/j.clinph.2015.04.108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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30
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Xu Q, Xing L, Xiong G, Elmore K, Min J. SU-E-I-41: Dictionary Learning Based Quantitative Reconstruction for Low-Dose Dual-Energy CT (DECT). Med Phys 2015. [DOI: 10.1118/1.4924038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Xu Q, Xing L, Xiong G, Elmore K, Min J. SU-E-I-39: Combining Conventional Tomographic Imaging Strategy and Interior Tomography for Low Dose Dual-Energy CT (DECT). Med Phys 2015. [DOI: 10.1118/1.4924036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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32
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Li C, Zuo W, Tong X, Hu H, Qiao L, Song J, Xiong G, Gao R, Dai F, Lu C. A composite method for mapping quantitative trait loci without interference of female achiasmatic and gender effects in silkworm,Bombyx mori. Anim Genet 2015; 46:426-32. [DOI: 10.1111/age.12311] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/15/2015] [Indexed: 11/27/2022]
Affiliation(s)
- C. Li
- State Key Laboratory of Silkworm Genome Biology; Southwest University; Chongqi-ng 400716 China
- Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry; Southwest University; Chongqing 400716 China
| | - W. Zuo
- State Key Laboratory of Silkworm Genome Biology; Southwest University; Chongqi-ng 400716 China
- Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry; Southwest University; Chongqing 400716 China
| | - X. Tong
- State Key Laboratory of Silkworm Genome Biology; Southwest University; Chongqi-ng 400716 China
- Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry; Southwest University; Chongqing 400716 China
| | - H. Hu
- State Key Laboratory of Silkworm Genome Biology; Southwest University; Chongqi-ng 400716 China
- Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry; Southwest University; Chongqing 400716 China
| | - L. Qiao
- Institute of Entomology and Molecular Biology; College of Life Sciences; Chongqing Normal University; Chongqing 401331 China
| | - J. Song
- State Key Laboratory of Silkworm Genome Biology; Southwest University; Chongqi-ng 400716 China
- Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry; Southwest University; Chongqing 400716 China
| | - G. Xiong
- State Key Laboratory of Silkworm Genome Biology; Southwest University; Chongqi-ng 400716 China
- Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry; Southwest University; Chongqing 400716 China
| | - R. Gao
- State Key Laboratory of Silkworm Genome Biology; Southwest University; Chongqi-ng 400716 China
- Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry; Southwest University; Chongqing 400716 China
| | - F. Dai
- State Key Laboratory of Silkworm Genome Biology; Southwest University; Chongqi-ng 400716 China
- Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry; Southwest University; Chongqing 400716 China
| | - C. Lu
- State Key Laboratory of Silkworm Genome Biology; Southwest University; Chongqi-ng 400716 China
- Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry; Southwest University; Chongqing 400716 China
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Rominger A, Cumming P, Brendel M, Xiong G, Zach C, Karch S, Tatsch K, Bartenstein P, la Fougère C, Koch W, Pogarell O. Altered serotonin and dopamine transporter availabilities in brain of depressed patients upon treatment with escitalopram: A [123 I]β-CIT SPECT study. Eur Neuropsychopharmacol 2015; 25:873-81. [PMID: 25819144 DOI: 10.1016/j.euroneuro.2014.12.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 11/25/2014] [Accepted: 12/24/2014] [Indexed: 01/13/2023]
Abstract
Altered SERT and DAT availabilities during treatment with escitalopram were investigated with [(123)I]2β-carbomethoxy-3β-(4-iodophenyl)tropane (β-CIT) SPECT in a series of patients fulfilling the criteria for unipolar major depressive disorder (MDD). 27 patients (10m, 42±16y) with diagnosis of MDD were recruited for the study. All patients underwent neuropsychiatric testing for assessment of Hamilton Depression (HAM-D) and Beck Depression Inventory (BDI) scores. At baseline, [(123)I]β-CIT SPECT recordings were acquired 4h (SERT-weighted) and 20-24h p.i (DAT-weighted). Follow-up scans and neuropsychiatric testing were performed after six weeks of stable escitalopram medication. Voxel-wise parametric maps of specific/ non-specific ratios-1 (~BPND) were calculated. At baseline, DAT-weighted BPND was 5.06±0.81 in striatum and SERT-weighted BPND was 0.94±0.18 in thalamus. There were significant negative correlations with age for DAT in striatum (R=-0.60; p<0.01) and SERT in thalamus (R=-0.45; p<0.05). Under SSRI treatment there was an apparent 42% occupancy of SERT in thalamus (p<0.0001), whereas DAT availability increased significantly by 20% in striatum (p<0.001); higher apparent SERT occupancy in thalamus was associated with lesser DAT increase in striatum (R=-0.62; p<0.005). The low apparent SERT occupancy may be confounded by alterations in SERT expression during treatment. Thus, [(123)I]β-CIT SPECT revealed age-dependent declines in DAT and SERT availabilities in un-medicated MDD patients, comparable to that seen previously in healthy controls. At follow-up, the SSRI-evoked increase in DAT was less pronounced in the older patients, even though apparent SERT occupancy and clinical improvement were not age-dependent. Present findings may have implications for escitalopram dosage and side effect profile in younger MDD patients.
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Affiliation(s)
- A Rominger
- Department of Nuclear Medicine, Ludwig-Maximilians-University of Munich, Munich, Germany.
| | - P Cumming
- Department of Psychiatry, University of Oslo, Oslo, Norway
| | - M Brendel
- Department of Nuclear Medicine, Ludwig-Maximilians-University of Munich, Munich, Germany
| | - G Xiong
- Department of Nuclear Medicine, Ludwig-Maximilians-University of Munich, Munich, Germany
| | - C Zach
- Department of Nuclear Medicine, Ludwig-Maximilians-University of Munich, Munich, Germany
| | - S Karch
- Department of Psychiatry, Ludwig-Maximilians-University of Munich, Munich, Germany
| | - K Tatsch
- Department of Nuclear Medicine, Municipal Hospital Karlsruhe Inc., Karlsruhe, Germany
| | - P Bartenstein
- Department of Nuclear Medicine, Ludwig-Maximilians-University of Munich, Munich, Germany
| | - C la Fougère
- Department of Nuclear Medicine, University of Tubingen, Tubingen, Germany
| | - W Koch
- Department of Nuclear Medicine, Ludwig-Maximilians-University of Munich, Munich, Germany
| | - O Pogarell
- Department of Psychiatry, Ludwig-Maximilians-University of Munich, Munich, Germany
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Zhao W, Niu T, Xing L, Xiong G, Elmore K, Zhu J, Wang L, Min J. MO-FG-204-03: Using Edge-Preserving Algorithm for Significantly Improved Image-Domain Material Decomposition in Dual Energy CT. Med Phys 2015. [DOI: 10.1118/1.4925424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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35
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Xiong G, Kola D, Heo R, Elmore K, Cho I, Min JK. Myocardial perfusion analysis in cardiac computed tomography angiographic images at rest. Med Image Anal 2015; 24:77-89. [PMID: 26073787 DOI: 10.1016/j.media.2015.05.010] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Revised: 05/14/2015] [Accepted: 05/18/2015] [Indexed: 01/25/2023]
Abstract
Cardiac computed tomography angiography (CTA) is a non-invasive method for anatomic evaluation of coronary artery stenoses. However, CTA is prone to artifacts that reduce the diagnostic accuracy to identify stenoses. Further, CTA does not allow for determination of the physiologic significance of the visualized stenoses. In this paper, we propose a new system to determine the physiologic manifestation of coronary stenoses by assessment of myocardial perfusion from typically acquired CTA images at rest. As a first step, we develop an automated segmentation method to delineate the left ventricle. Both endocardium and epicardium are compactly modeled with subdivision surfaces and coupled by explicit thickness representation. After initialization with five anatomical landmarks, the model is adapted to a target image by deformation increments including control vertex displacements and thickness variations guided by trained AdaBoost classifiers, and regularized by a prior of deformation increments from principal component analysis (PCA). The evaluation using a 5-fold cross-validation demonstrates the overall segmentation error to be 1.00 ± 0.39 mm for endocardium and 1.06 ± 0.43 mm for epicardium, with a boundary contour alignment error of 2.79 ± 0.52. Based on our LV model, two types of myocardial perfusion analyzes have been performed. One is a perfusion network analysis, which explores the correlation (as network edges) pattern of perfusion between all pairs of myocardial segments (as network nodes) defined in AHA 17-segment model. We find perfusion network display different patterns in the normal and disease groups, as divided by whether significant coronary stenosis is present in quantitative coronary angiography (QCA). The other analysis is a clinical validation assessment of the ability of the developed algorithm to predict whether a patient has significant coronary stenosis when referenced to an invasive QCA ground truth standard. By training three machine learning techniques using three features of normalized perfusion intensity, transmural perfusion ratio, and myocardial wall thickness, we demonstrate AdaBoost to be slightly better than Naive Bayes and Random Forest by the area under receiver operating characteristics (ROC) curve. For the AdaBoost algorithm, an optimal cut-point reveals an accuracy of 0.70, with sensitivity and specificity of 0.79 and 0.64, respectively. Our study shows perfusion analysis from CTA images acquired at rest is useful for providing physiologic information in diagnosis of obstructive coronary artery stenoses.
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Affiliation(s)
- Guanglei Xiong
- Department of Radiology and Dalio Institute of Cardiovascular Imaging, Weill Cornell Medical College, 10021 NY, USA.
| | - Deeksha Kola
- Dalio Institute of Cardiovascular Imaging NewYork-Presbyterian Hospital and Weill Cornell Medical College, 10021 NY, USA.
| | - Ran Heo
- Division of Cardiology, Severance Cardiovascular Hospital, Seoul, Korea.
| | - Kimberly Elmore
- Dalio Institute of Cardiovascular Imaging NewYork-Presbyterian Hospital and Weill Cornell Medical College, 10021 NY, USA.
| | - Iksung Cho
- Dalio Institute of Cardiovascular Imaging NewYork-Presbyterian Hospital and Weill Cornell Medical College, 10021 NY, USA.
| | - James K Min
- Dalio Institute of Cardiovascular Imaging NewYork-Presbyterian Hospital and Weill Cornell Medical College, 10021 NY, USA.
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Lutz F, Xiong G, Jungblut R, Orlik-Eisel G, Göbel-Reifert A, Leidolf R. Pore-forming cytotoxin of Pseudomonas aeruginosa: the molecular effects and aspects of pathogenicity. Antibiot Chemother (1971) 2015; 44:54-8. [PMID: 1724893 DOI: 10.1159/000420297] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- F Lutz
- Institut für Pharmakologie und Toxikologie der Universität, Giessen, FRG
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37
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Truong QA, Thai WE, Wai B, Cordaro K, Cheng T, Beaudoin J, Xiong G, Cheung JW, Altman R, Min JK, Singh JP, Barrett CD, Danik S. Myocardial scar imaging by standard single-energy and dual-energy late enhancement CT: Comparison with pathology and electroanatomic map in an experimental chronic infarct porcine model. J Cardiovasc Comput Tomogr 2015; 9:313-20. [PMID: 25977115 DOI: 10.1016/j.jcct.2015.03.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Revised: 02/27/2015] [Accepted: 03/16/2015] [Indexed: 11/26/2022]
Abstract
BACKGROUND Myocardial scar is a substrate for ventricular tachycardia and sudden cardiac death. Late enhancement CT imaging can detect scar, but it remains unclear whether newer late enhancement dual-energy (LE-DECT) acquisition has benefit over standard single-energy late enhancement (LE-CT). OBJECTIVE We aim to compare late enhancement CT using newer LE-DECT acquisition and single-energy LE-CT acquisitions with pathology and electroanatomic map (EAM) in an experimental chronic myocardial infarction (MI) porcine study. METHODS In 8 pigs with chronic myocardial infarction (59 ± 5 kg), we performed dual-source CT, EAM, and pathology. For CT imaging, we performed 3 acquisitions at 10 minutes after contrast administration: LE-CT 80 kV, LE-CT 100 kV, and LE-DECT with 2 postprocessing software settings. RESULTS Of the sequences, LE-CT 100 kV provided the best contrast-to-noise ratio (all P ≤ .03) and correlation to pathology for scar (ρ = 0.88). LE-DECT overestimated scar (both P = .02), whereas LE-CT images did not (both P = .08). On a segment basis (n = 136), all CT sequences had high specificity (87%-93%) and modest sensitivity (50%-67%), with LE-CT 100 kV having the highest specificity of 93% for scar detection compared to pathology and agreement with EAM (κ = 0.69). CONCLUSIONS Standard single-energy LE-CT, particularly 100 kV, matched better to pathology and EAM than dual-energy LE-DECT for scar detection. Larger human trials as well as more technical studies that optimize varying different energies with newer hardware and software are warranted.
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Affiliation(s)
- Quynh A Truong
- Dalio Institute of Cardiovascular Imaging, Weill Cornell Medical College and the New York-Presbyterian Hospital, 413 E. 69th Street, Suite 108, New York, NY 10021, USA; Division of Cardiology, Weill Cornell Medical College and the New York-Presbyterian Hospital, New York, NY, USA.
| | - Wai-Ee Thai
- Cardiac MR PET CT Program, Division of Cardiology, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Bryan Wai
- Cardiac MR PET CT Program, Division of Cardiology, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Kevin Cordaro
- Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Teresa Cheng
- Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Jonathan Beaudoin
- Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Guanglei Xiong
- Dalio Institute of Cardiovascular Imaging, Weill Cornell Medical College and the New York-Presbyterian Hospital, 413 E. 69th Street, Suite 108, New York, NY 10021, USA
| | - Jim W Cheung
- Division of Cardiology, Weill Cornell Medical College and the New York-Presbyterian Hospital, New York, NY, USA
| | - Robert Altman
- Al-Sabah Arrhythmia Institute, Mount Sinai St. Luke's-Roosevelt Hospital Center, New York, NY, USA
| | - James K Min
- Dalio Institute of Cardiovascular Imaging, Weill Cornell Medical College and the New York-Presbyterian Hospital, 413 E. 69th Street, Suite 108, New York, NY 10021, USA; Division of Cardiology, Weill Cornell Medical College and the New York-Presbyterian Hospital, New York, NY, USA
| | - Jagmeet P Singh
- Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Conor D Barrett
- Al-Sabah Arrhythmia Institute, Mount Sinai St. Luke's-Roosevelt Hospital Center, New York, NY, USA
| | - Stephan Danik
- Al-Sabah Arrhythmia Institute, Mount Sinai St. Luke's-Roosevelt Hospital Center, New York, NY, USA
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Elmore K, Cho I, Hartaigh BO, Schulman-Marcus J, Szymonifka J, Earls J, Yahagi K, Xiong G, Starikov A, Joner M, Virmani R, Min J. DIAGNOSIS OF NECROTIC INTRAPLAQUE CORES BY DUAL ENERGY CORONARY COMPUTED TOMOGRAPHIC ANGIOGRAPHY IN VICTIMS OF SUDDEN CORONARY DEATH: VALIDATION TO A PATHOLOGIC GOLD STANDARD. J Am Coll Cardiol 2015. [DOI: 10.1016/s0735-1097(15)61258-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Xiong G, Kola D, Elmore K, Heo R, Truong Q, Gomez M, Min J. MYOCARDIAL PERFUSION NETWORK ANALYSIS BY CARDIAC COMPUTED TOMOGRAPHY AS A NOVEL METRIC FOR IDENTIFICATION OF HIGH-GRADE ANATOMIC CORONARY STENOSIS. J Am Coll Cardiol 2015. [DOI: 10.1016/s0735-1097(15)61131-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Starikov A, Xiong G, Min J. WALL SHEAR STRESS CALCULATED BY COMPUTATIONAL FLUID DYNAMICS FROM CORONARY CT ANGIOGRAPHY IMAGES FOR IDENTIFICATION AND EXCLUSION OF LESION-SPECIFIC ISCHEMIA. J Am Coll Cardiol 2015. [DOI: 10.1016/s0735-1097(15)61107-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Abstract
The assessment of ventricular function, cardiac chamber dimensions, and ventricular mass is fundamental for clinical diagnosis, risk assessment, therapeutic decisions, and prognosis in patients with cardiac disease. Although cardiac CT is a noninvasive imaging technique often used for the assessment of coronary artery disease, it can also be used to obtain important data about left and right ventricular function and morphology. In this review, we will discuss the clinical indications for the use of cardiac CT for ventricular analysis, review the evidence on the assessment of ventricular function compared with existing imaging modalities such cardiac magnetic resonance imaging and echocardiography, provide a typical cardiac CT protocol for image acquisition and postprocessing for ventricular analysis, and provide step-by-step instructions to acquire multiplanar cardiac views for ventricular assessment from the standard axial, coronal, and sagittal planes. Furthermore, both qualitative and quantitative assessments of ventricular function as well as sample reporting are detailed.
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Affiliation(s)
- Asim Rizvi
- Department of Radiology, Dalio Institute of Cardiovascular Imaging, New York-Presbyterian Hospital and Weill Cornell Medical College, Suite 108, 413 East 69th Street, New York, NY 10021, USA
| | - Roderick C Deaño
- Division of Cardiovascular Disease, New York-Presbyterian Hospital and Weill Cornell Medical College, New York, NY, USA
| | - Daniel P Bachman
- Department of Radiology, Dalio Institute of Cardiovascular Imaging, New York-Presbyterian Hospital and Weill Cornell Medical College, Suite 108, 413 East 69th Street, New York, NY 10021, USA
| | - Guanglei Xiong
- Department of Radiology, Dalio Institute of Cardiovascular Imaging, New York-Presbyterian Hospital and Weill Cornell Medical College, Suite 108, 413 East 69th Street, New York, NY 10021, USA
| | - James K Min
- Department of Radiology, Dalio Institute of Cardiovascular Imaging, New York-Presbyterian Hospital and Weill Cornell Medical College, Suite 108, 413 East 69th Street, New York, NY 10021, USA; Division of Cardiovascular Disease, New York-Presbyterian Hospital and Weill Cornell Medical College, New York, NY, USA
| | - Quynh A Truong
- Department of Radiology, Dalio Institute of Cardiovascular Imaging, New York-Presbyterian Hospital and Weill Cornell Medical College, Suite 108, 413 East 69th Street, New York, NY 10021, USA; Division of Cardiovascular Disease, New York-Presbyterian Hospital and Weill Cornell Medical College, New York, NY, USA.
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Cai KC, Liu DG, Wang YY, Wu H, Huang ZY, Cai RJ, Wang HF, Xiong G, Zhang ZL. Gefitinib maintenance therapy in Chinese advanced-stage lung adenocarcinoma patients with EGFR mutations treated with prior chemotherapy. Neoplasma 2015; 62:302-7. [PMID: 25591596 DOI: 10.4149/neo_2015_036] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
UNLABELLED The aim of this study was to determine the response of advanced-stage non-small cell lung cancer (NSCLC) patients with or without EGFR mutations to platinum-based chemotherapy with or without gefitinib maintenance. Patients were treated with four cycles of platinum-based chemotherapy. Patients with wild-type EGFR were observed (group 1; n=15). EGFR mutation-positive patients were randomly assigned to observation (group 2; n=7) or gefitinib maintenance (group 3; n=7). The median patient age was 59 years. The 1-year progression-free survival rates in groups 1, 2, and 3 were 6.7%, 28.6%, and 57.1%, respectively (p = 0.049); the 1-year overall survival rates were 53.3%, 57.1 %, and 100%, respectively (p = 0.111). The results indicate that patients with advanced-stage NSCLC with EGFR mutations have a better response to chemotherapy followed by gefitinib than chemotherapy alone and a better response to chemotherapy than wild-type patients. KEYWORDS chemotherapy, gefitinib, NSCLC, tyrosine kinase inhibitors.
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Abstract
Ten patients with metacarpophalangeal joint locking of the thumb were studied. Three of them underwent surgical release. During surgery, it was found that the radial sesamoid was seated in a cartilage defect on the volar aspect of the metacarpal head. It appeared that the defect was created by the proximal edge of sesamoid. When the abductor pollicis brevis and flexor pollicis brevis muscles were partially detached from their insertion at the base of the proximal phalanx, the locking could be successfully released. We hypothesize the mechanism of the metacarpophalangeal joint locking of the thumb in our cases was a hyperextension injury that displaced the radial sesamoid distally and radially. In turn, the sesamoid's pointed proximal edge wore a groove in the cartilage on the metacarpal head, and under abductor pollicis brevis and flexor pollicis brevis tension, the radial sesamoid was locked into the cartilage defect; thereby causing locking of the joint.
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Affiliation(s)
- G Xiong
- Department of Hand Surgery, Beijing Jishuitan Hospital, Beijing, China
| | - Y Gao
- Department of Hand Surgery, Beijing Jishuitan Hospital, Beijing, China
| | - S Guo
- Department of Trauma & Orthopaedic Surgery, Charing Cross Hospital, London, UK
| | - L Dai
- Department of Hand Surgery, Beijing Jishuitan Hospital, Beijing, China
| | - K Liu
- Department of Hand Surgery, Beijing Jishuitan Hospital, Beijing, China
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Taylor-Teeples M, Lin L, de Lucas M, Turco G, Toal TW, Gaudinier A, Young NF, Trabucco GM, Veling MT, Lamothe R, Handakumbura PP, Xiong G, Wang C, Corwin J, Tsoukalas A, Zhang L, Ware D, Pauly M, Kliebenstein DJ, Dehesh K, Tagkopoulos I, Breton G, Pruneda-Paz JL, Ahnert SE, Kay SA, Hazen SP, Brady SM. An Arabidopsis gene regulatory network for secondary cell wall synthesis. Nature 2014; 517:571-5. [PMID: 25533953 PMCID: PMC4333722 DOI: 10.1038/nature14099] [Citation(s) in RCA: 447] [Impact Index Per Article: 44.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Accepted: 11/20/2014] [Indexed: 12/15/2022]
Abstract
The plant cell wall is an important factor for determining cell shape, function and response to the environment. Secondary cell walls, such as those found in xylem, are composed of cellulose, hemicelluloses and lignin and account for the bulk of plant biomass. The coordination between transcriptional regulation of synthesis for each polymer is complex and vital to cell function. A regulatory hierarchy of developmental switches has been proposed, although the full complement of regulators remains unknown. Here, we present a protein-DNA network between Arabidopsis transcription factors and secondary cell wall metabolic genes with gene expression regulated by a series of feed-forward loops. This model allowed us to develop and validate new hypotheses about secondary wall gene regulation under abiotic stress. Distinct stresses are able to perturb targeted genes to potentially promote functional adaptation. These interactions will serve as a foundation for understanding the regulation of a complex, integral plant component.
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Affiliation(s)
- M Taylor-Teeples
- 1] Department of Plant Biology, University of California Davis, One Shields Avenue, Davis, California 95616, USA [2] Genome Center, University of California Davis, One Shields Avenue, Davis, California 95616, USA
| | - L Lin
- Biology Department, University of Massachusetts, Amherst, Massachusetts 01003, USA
| | - M de Lucas
- 1] Department of Plant Biology, University of California Davis, One Shields Avenue, Davis, California 95616, USA [2] Genome Center, University of California Davis, One Shields Avenue, Davis, California 95616, USA
| | - G Turco
- 1] Department of Plant Biology, University of California Davis, One Shields Avenue, Davis, California 95616, USA [2] Genome Center, University of California Davis, One Shields Avenue, Davis, California 95616, USA
| | - T W Toal
- 1] Department of Plant Biology, University of California Davis, One Shields Avenue, Davis, California 95616, USA [2] Genome Center, University of California Davis, One Shields Avenue, Davis, California 95616, USA
| | - A Gaudinier
- 1] Department of Plant Biology, University of California Davis, One Shields Avenue, Davis, California 95616, USA [2] Genome Center, University of California Davis, One Shields Avenue, Davis, California 95616, USA
| | - N F Young
- Biology Department, University of Massachusetts, Amherst, Massachusetts 01003, USA
| | - G M Trabucco
- Biology Department, University of Massachusetts, Amherst, Massachusetts 01003, USA
| | - M T Veling
- Biology Department, University of Massachusetts, Amherst, Massachusetts 01003, USA
| | - R Lamothe
- Biology Department, University of Massachusetts, Amherst, Massachusetts 01003, USA
| | - P P Handakumbura
- Biology Department, University of Massachusetts, Amherst, Massachusetts 01003, USA
| | - G Xiong
- Department of Plant and Microbial Biology, University of California Berkeley, Berkeley, California 94720, USA
| | - C Wang
- Department of Plant Biology, University of California Davis, One Shields Avenue, Davis, California 95616, USA
| | - J Corwin
- Department of Plant Sciences, University of California Davis, One Shields Avenue, Davis, California 95616, USA
| | - A Tsoukalas
- 1] Genome Center, University of California Davis, One Shields Avenue, Davis, California 95616, USA [2] Department of Computer Science, University of California Davis, One Shields Avenue, Davis, California 95616, USA
| | - L Zhang
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA
| | - D Ware
- 1] Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA [2] US Department of Agriculture, Agricultural Research Service, Ithaca, New York 14853, USA
| | - M Pauly
- Department of Plant and Microbial Biology, University of California Berkeley, Berkeley, California 94720, USA
| | - D J Kliebenstein
- Department of Plant Sciences, University of California Davis, One Shields Avenue, Davis, California 95616, USA
| | - K Dehesh
- Department of Plant Biology, University of California Davis, One Shields Avenue, Davis, California 95616, USA
| | - I Tagkopoulos
- 1] Genome Center, University of California Davis, One Shields Avenue, Davis, California 95616, USA [2] Department of Computer Science, University of California Davis, One Shields Avenue, Davis, California 95616, USA
| | - G Breton
- Section of Cell and Developmental Biology, Division of Biological Sciences, University of California San Diego, La Jolla, California 92093, USA
| | - J L Pruneda-Paz
- Section of Cell and Developmental Biology, Division of Biological Sciences, University of California San Diego, La Jolla, California 92093, USA
| | - S E Ahnert
- Theory of Condensed Matter Group, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, UK
| | - S A Kay
- Section of Cell and Developmental Biology, Division of Biological Sciences, University of California San Diego, La Jolla, California 92093, USA
| | - S P Hazen
- Biology Department, University of Massachusetts, Amherst, Massachusetts 01003, USA
| | - S M Brady
- 1] Department of Plant Biology, University of California Davis, One Shields Avenue, Davis, California 95616, USA [2] Genome Center, University of California Davis, One Shields Avenue, Davis, California 95616, USA
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Cho I, Elmore K, Ó Hartaigh B, Schulman-Marcus J, Granser H, Valenti V, Xiong G, Carrascosa PM, Min JK. Heart-rate dependent improvement in image quality and diagnostic accuracy of coronary computed tomographic angiography by novel intracycle motion correction algorithm. Clin Imaging 2014; 39:421-6. [PMID: 25649255 DOI: 10.1016/j.clinimag.2014.11.020] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 11/18/2014] [Accepted: 11/20/2014] [Indexed: 11/30/2022]
Abstract
BACKGROUND To determine the effect of a novel intracycle motion correction algorithm (MCA) on diagnostic accuracy of coronary computed tomographic angiography. METHODS Coronary artery phantom models were scanned at static and heart rate (HR) simulation of 60-100 beat/min and reconstructed with a conventional algorithm and MCA. RESULTS Among 144 coronary segments, improvements in image interpretability, quality, and diagnostic accuracy by MCA were observed for HRs of 80 and 100 (P<.05 for all), but not for HR of 60. CONCLUSION Novel intracycle MCA demonstrates improved HR-dependent image interpretability, and quality and accuracy, particularly at higher HRs.
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Affiliation(s)
- Iksung Cho
- Department of Radiology, NewYork-Presbyterian Hospital and the Weill Cornell Medical College, New York, NY, USA; Division of Cardiology, Severance Cardiovascular Hospital and Severance Biomedical Science Institute, Yonsei University College of Medicine, Yonsei University Health System, Seoul, South Korea
| | - Kimberly Elmore
- Department of Radiology, NewYork-Presbyterian Hospital and the Weill Cornell Medical College, New York, NY, USA
| | - Bríain Ó Hartaigh
- Department of Radiology, NewYork-Presbyterian Hospital and the Weill Cornell Medical College, New York, NY, USA
| | - Josh Schulman-Marcus
- Department of Radiology, NewYork-Presbyterian Hospital and the Weill Cornell Medical College, New York, NY, USA
| | - Heidi Granser
- Departments of Imaging and Medicine, Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Valentina Valenti
- Department of Radiology, NewYork-Presbyterian Hospital and the Weill Cornell Medical College, New York, NY, USA
| | - Guanglei Xiong
- Department of Radiology, NewYork-Presbyterian Hospital and the Weill Cornell Medical College, New York, NY, USA
| | | | - James K Min
- Department of Radiology, NewYork-Presbyterian Hospital and the Weill Cornell Medical College, New York, NY, USA.
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Choi G, Xiong G, Cheng CP, Taylor CA. Methods for Characterizing Human Coronary Artery Deformation From Cardiac-Gated Computed Tomography Data. IEEE Trans Biomed Eng 2014; 61:2582-92. [DOI: 10.1109/tbme.2014.2323333] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Zwergal A, Beck R, Günther L, Xiong G, Brandt T, Jahn K, Strupp M, Dieterich M, la Fougere C. Beeinflusst eine symptomlindernde Akuttherapie bei einseitigem Labyrinthausfall die zentrale vestibuläre Kompensation? KLIN NEUROPHYSIOL 2014. [DOI: 10.1055/s-0034-1371230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Schöberl F, Kugler G, Kohlbecher S, Werner P, Xiong G, la Fougere C, Schneider E, Brandt T, Dieterich M, Jahn K, Zwergal A. Hirnaktivierung während realer 3D-Navigation. KLIN NEUROPHYSIOL 2014. [DOI: 10.1055/s-0034-1371204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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50
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Zwergal A, Günther L, Beck R, Xiong G, Brandt T, Jahn K, Strupp M, Dieterich M, la Fougere C. N-Acetyl-L-leucine beschleunigt die vestibuläre Kompensation durch Modulation cerebellärer und thalamischer Plastizität. KLIN NEUROPHYSIOL 2014. [DOI: 10.1055/s-0034-1371190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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