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Hu H, He A, Aasen D, Shukla S, Ivey DG. Dimple Grinding Coupled with Optical Microscopy for Porosity Analysis of Metallic Coatings. Micron 2024; 178:103593. [PMID: 38301295 DOI: 10.1016/j.micron.2024.103593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 01/18/2024] [Accepted: 01/22/2024] [Indexed: 02/03/2024]
Abstract
Dimple grinding is one of the steps used in a common method of preparing samples for transmission electron microscopy (TEM); the TEM sample preparation process also involves ion beam sputtering after the dimpling stage. During dimpling, a spherical depression is machined into the sample, leaving a thicker rim to support and facilitate sample handling. In this paper, an alternative application for dimple grinding is developed; dimple grinding combined with optical microscopy is utilized to quantify internal porosity present within coatings. This technique essentially permits three dimensional porosity quantification across the coating thickness using a simple polishing method which provides analysis of areas larger than those observed during standard cross sectional microscopy. The application of this technique to nine electroless nickel-phosphorus (Ni-P) coatings deposited on Mg substrates is demonstrated. An analysis linking medium P content in the Ni-P coatings and high coating thickness to lower porosity is also performed. The lowest porosity was observed for medium P content coatings (5.2 wt% P), while the largest porosity occurred for the high P content coatings (10.0 wt% P). Porosity levels decreased continuously with increasing coating thickness (from 28 µm to 57 µm).
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Affiliation(s)
- H Hu
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada
| | - A He
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada
| | - D Aasen
- Zinc8 Energy Solutions Inc., Vancouver, British Columbia, Canada
| | - S Shukla
- Zinc8 Energy Solutions Inc., Vancouver, British Columbia, Canada
| | - D G Ivey
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada.
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Amarell K, Carrasquilla M, McGunigal M, Pang D, He A, Unger KR. Hypofractionated Intensity Modulated Proton Therapy (IMPT) and Systemic Therapy for Unresectable Hepatobiliary Cancers. Int J Radiat Oncol Biol Phys 2023; 117:e282. [PMID: 37785054 DOI: 10.1016/j.ijrobp.2023.06.1265] [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: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Proton therapy offers significantly reduced normal liver dose compared to photon therapy for liver tumors, and therefore has the potential for dose escalation and hypofractionation. Employing IMPT, we have initiated a hypofractionated treatment regimen for unresectable liver cancer at a single academic institution. Here we report our initial results on dosimetry and clinical outcomes of hypofractionated IMPT for unresectable hepatocellular carcinoma (HCC) and cholangiocarcomas (CC). MATERIALS/METHODS We retrospectively reviewed records of consecutive patients treated with IMPT for CC and HCC from 2018 to 2021. Inverse treatment planning with robust optimization, daily image guidance, pencil beam scanning dose delivery were used for all patients. Motion management included 4D-CT and abdominal compression. Toxicity was graded using the Common Terminology Criteria for Adverse Events version 5.0 and survival was calculated using the Kaplan Meier method. RESULTS We identified 15 patients (3 HCC, 4 intrahepatic CC, 8 hilar CC) treated with IMPT to a median dose of 5805 cGy (range, 4500 - 6000 cGy) in 15 fractions. Two had metastatic and 13 had regional disease. Median tumor volume was 91.5 cc (range, 10.92 - 366.31 cc). Prior therapies included: 12 patients received upfront chemotherapy, (gemcitabine plus cisplatin most common), 4 received prior surgery on the liver, and 5 received prior liver directed treatment. With a median follow up of 10 months, the median overall survival (OS) and 1-year OS was 18.7 months and 76% respectively. One patient underwent resection and 1 patient received liver transplant; 7 (47%) patients had disease progression (3 local, 1 regional lymph node, 4 elsewhere liver, 5 distant metastatic). Five patients with CC developed grade 3 toxicity in the form of cholangitis (4) and hemobilia (1). Of these patients, 4 patients were of the hilar type. CONCLUSION Our early results using hypofractionated IMPT for unresectable HCC and CC resulted in encouraging local control rates with an acceptable toxicity profile. Further study is warranted to determine the optimal liver directed therapy for this challenging patient population.
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Affiliation(s)
- K Amarell
- University Hospitals Geauga Medical Center, Chardon, OH
| | - M Carrasquilla
- Department of Radiation Medicine, MedStar Georgetown University Hospital, Washington, DC
| | - M McGunigal
- Department of Radiation Medicine, Georgetown University Hospital, Washington, DC
| | - D Pang
- Medstar Georgetown University Hospital, Washington, DC
| | - A He
- Department of Hematology/Oncology Georgetown University Hospital, Washington, DC
| | - K R Unger
- Department of Radiation Medicine, Georgetown University Hospital, Washington, DC
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Lopez PG, Girard N, Cho B, Sabari J, Spira A, Sanborn R, Goto K, Yang JH, Curtin J, Lyu X, He A, Penton J, Edwards J, Massin GL, Xia K, Chioda M, Thayu M, Knoblauch R, Mahadevia P, Leighl N. 30 Long-term efficacy, safety, and predictors of response to amivantamab among patients with post-platinum EGFR Ex20ins-mutated advanced NSCLC. J Thorac Oncol 2023. [DOI: 10.1016/s1556-0864(23)00257-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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Sehly A, He A, Jaltotage B, Lan NSR, Joyner J, Flack J, Sokolov J, Chronos N, Ko B, Chow B, Dwivedi G, Ihdayhid AR. Coronary artery stenosis and vulnerable plaque quantification on CCTA by deep learning methods. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.196] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Coronary computed tomography angiography (CCTA) has emerged as a reliable non-invasive modality to assess coronary artery stenosis (CAS) severity and vulnerable plaque (VP). However, comprehensive CCTA assessment, especially VP, is time-consuming and dependent on reader expertise, limiting CCTA's true potential.
Purpose
In this study, we aim to develop and validate a deep learning (DL) based system capable of evaluating CAS severity and characterising VP on CCTA.
Methods
A DL system was trained to assess CAS severity on 3909 expert annotated vessels. A subset of 824 vessels was used to train the model to assess for the presence of VP. The model was based on a 2D U-Net and 3D convolutional neural network architecture. The system automatically performed vessel tracking and segmentation to quantify stenosis severity and characterise the presence of VP. CAS severity was categorised as 0%, 1–49% and ≥50%. VP was defined as: low attenuation plaque (LAP; ≤30 Hounsfield units), positive remodelling (PR; ≥10% diameter) and spotty calcification (SC; <3mm). The model was then tested on 1435 vessels for CAS (mean calcium score 197±502) and a subset of 365 vessels for VP (mean calcium score 419±551), and its diagnostic performance compared with expert readers.
Results
The CAS testing data had a prevalence of 75% (1080/1435), 18% (257/1435) and 6.8% (98/1435) for 0%, 1–49% and ≥50% stenosis, respectively. VP was present in 20% (72/365) in the respective dataset with 44% (32/72) LAP, 19% (14/72) PR and 36% (26/72) SC. Average analysis time for CAS severity and VP was 3.7±2.0s and 3.5±1.8s, respectively. Diagnostic performance of our system is summarised in Tables 1 (CAS severity) and 2 (VP characteristics).
Conclusions
We developed an DL based system capable of rapidly evaluating CAS severity and characterising VP on CCTA. Our system demonstrated high specificity and accuracy for both CAS severity and VP quantification when compared with expert readers.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- A Sehly
- Fiona Stanley Hospital , Perth , Australia
| | - A He
- Fiona Stanley Hospital , Perth , Australia
| | | | - N S R Lan
- Fiona Stanley Hospital , Perth , Australia
| | | | | | - J Sokolov
- University of Southern California, School of Medicine , Los Angeles , United States of America
| | - N Chronos
- School of Medicine , Stanford , United States of America
| | - B Ko
- Monash Heart , Melbourne , Australia
| | - B Chow
- Ottawa Heart Institute , Ottawa , Canada
| | - G Dwivedi
- Harry Perkins Institute of Medical Research , Perth , Australia
| | - A R Ihdayhid
- Harry Perkins Institute of Medical Research , Perth , Australia
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He A, Sehly A, Jaltotage B, Lan N, Joyner J, Flack J, Sokolov J, Chronos N, Ko B, Chow B, Dwivedi G, Ihdayhid A. 448 Comprehensive Assessment Of Coronary Artery Disease On CCTA Using Deep Learning Methods. J Cardiovasc Comput Tomogr 2022. [DOI: 10.1016/j.jcct.2022.06.053] [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: 11/29/2022]
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Sehly A, He A, Lan N, Jaltotage B, Joyner J, Flack J, Kwok S, Chow B, Ko B, Ridner M, Ihdayhid A, Dwivedi G. 402 Artificial Intelligence Based CT Quantification Of Left Ventricular Mass. J Cardiovasc Comput Tomogr 2022. [DOI: 10.1016/j.jcct.2022.06.007] [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: 10/17/2022]
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He A, Valle J, Lee C, Ikeda M, Potemski P, Morizane C, Cundom J, Tougeron D, Dayyani F, Rokutanda N, Xiong J, Cohen G, Oh D. O-1 Outcomes by primary tumour location in patients with advanced biliary tract cancer treated with durvalumab or placebo plus gemcitabine and cisplatin in the phase 3 TOPAZ-1 study. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.04.442] [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: 11/01/2022] Open
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Melero I, Yau T, Kang Y, Kim T, Santoro A, Sangro B, Kudo M, Hou M, Matilla A, Tovoli F, Knox J, He A, El-Rayes B, Acosta-Rivera M, Lim H, Soleymani S, Yao J, Neely J, Tschaika M, Hsu C, El-Khoueiry A. SO-12 Nivolumab (NIVO) plus ipilimumab (IPI) combination therapy in patients with advanced hepatocellular carcinoma (aHCC): 5-year results from CheckMate 040. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.04.411] [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: 11/01/2022] Open
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He A, Ding X, Huang J, Luo X, Meng J, Cao Y, Gao F, Zou M. [Clinical characteristics and risk factors of lower extremity arterial disease in patients with diabetic foot ulcer]. Nan Fang Yi Ke Da Xue Xue Bao 2022; 42:604-609. [PMID: 35527498 DOI: 10.12122/j.issn.1673-4254.2022.04.18] [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] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
OBJECTIVE To investigate the clinical characteristics of lower extremity arterial disease (LEAD) and its risk factors in patients with diabetic foot ulcer (DFU). METHODS We retrospectively collected the clinical and follow-up data of 650 patients with DFU treated in the Department of Endocrinology and Metabolism of Nanfang Hospital between January, 2017 and December, 2019. We compared the data between patients who had LEAD and those without LEAD and used a multivariate logistic regression model to analyze the risk factors of LEAD in DFU patients. RESULTS Among the 650 DFU patients, 470 (72.4%) had LEAD. The patients were followed up for a mean of 3.5 months, and the mean healing time of DFU was 2.55 months; healing of DFU occurred in 453 patients and 183 patients received amputation. The patients with LEAD and those without LEAD differed significantly in age, hospitalization costs, diastolic blood pressure (DBP), glycated hemoglobin, blood lipid levels, disease course, ankle brachial index, healing time, smoking history, clinical outcomes, Wagner grade and imaging results (P < 0.05). Multivariate logistic regression analysis identified age (OR=1.070, 95% CI: 1.049-1.091), smoking history (OR= 2.013, 95% CI: 1.268-3.195), and a decreased DBP (OR=0.980, 95% CI: 0.963-0.997) as independent risk factors for LEAD in DFU patients. A prolonged healing time was a prominent clinical feature of DFU complicated by LEAD. CONCLUSION DFU patients have a high incidence of LEAD, which leads to high rates of disability and mortality and is associated with an advanced age, high smoking rate and longer healing time. A decreased DBP is also a risk factor for LEAD in DFU patients.
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Affiliation(s)
- A He
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - X Ding
- Department of Occupational Health and Medicine, School of Public Health, Southern Medical University, Guangzhou 510515, China
| | - J Huang
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - X Luo
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - J Meng
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Y Cao
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - F Gao
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - M Zou
- Department of Endocrinology and Metabolism, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
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Sehly A, He A, Lan N, Jaltotage B, Kwok S, Flack J, Joyner J, Sokolov J, Chow B, Ko B, Figtree G, Ihdayhid A, Dwivedi G. Fully Automated Characterisation of Vulnerable Plaque Features on Cardiac CT Using Deep Learning Techniques. Heart Lung Circ 2022. [DOI: 10.1016/j.hlc.2022.06.014] [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: 10/16/2022]
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11
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Ghodsian M, Lee T, Nguyen H, Walters C, He A, McCarthy M, Ihdayhid A, Dwivedi G. Prevalence and Clinical Significance of Incidental Cardiac Uptake of Technetium99m Hydroxydiphosphate (Tc99m-HDP) on Bone Scintigraphy. Heart Lung Circ 2022. [DOI: 10.1016/j.hlc.2022.06.274] [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: 10/16/2022]
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12
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Sehly A, He A, Ihdayhid A, Grey C, O'Connor S, Rankin J, Fegan P, Yeap B, Dwivedi G, Lan N. SGLT2 Inhibitor use Pre-Discharge Improves Left Atrial Reservoir and Contractile Function Following Acute Coronary Syndrome in Patients With Siabetes. Heart Lung Circ 2022. [DOI: 10.1016/j.hlc.2022.06.287] [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: 11/28/2022]
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13
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He A, Sehly A, Lan N, Jaltotage B, Kwok S, Flack J, Joyner J, Chronos N, Chow B, Ko B, Figtree G, Dwivedi G, Ihdayhid A. Automated Assessment of CT Coronary Artery Stenosis Using a Deep Learning Approach. Heart Lung Circ 2022. [DOI: 10.1016/j.hlc.2022.06.225] [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: 10/16/2022]
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Cui L, He A, Wang X, Wang Y, Huang X, Ni Z. Development and validation of a competency evaluation model for hospital infection prevention and control practitioners in the post-pandemic era: a mixed methods study. J Hosp Infect 2021; 119:132-140. [PMID: 34666118 PMCID: PMC8520173 DOI: 10.1016/j.jhin.2021.08.028] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 08/25/2021] [Accepted: 08/25/2021] [Indexed: 12/15/2022]
Abstract
Background During the coronavirus disease 2019 pandemic, the management of nosocomial infections became even more crucial. There is an urgent need to develop a competency model for healthcare practitioners to combat public health emergencies. Aim To determine practitioners' competency in hospital infection prevention and control measures. Methods A theoretical framework was developed based on a literature review, key informant interviews, the Delphi method and a questionnaire survey. These items were evaluated based on response rate, maximum score, minimum score and mean score. Factor analyses, both exploratory and confirmatory, were used to determine the structure of the competency model. Results The effective response rate for the questionnaire was 88.29%, and Cronbach's α-coefficient was 0.964. Factor analysis revealed a Kaiser–Meyer–Olkin score of 0.945. Bartlett's test gave a χ2-value of 10523.439 (df=435; P<0.001). After exploratory factor analysis, the five-factor model was retained, four items were deleted and a five-dimensional, 26-item scale was obtained. The new structure's confirmatory factor analysis revealed high goodness of fit (comparative fit index=0.921; Tucker–Lewis index=0.911; standardized root mean square residual=0.053; root mean square error of approximation=0.044). Conclusion The proposed scale is a useful tool to assess the competency of hospital infection prevention and control practitioners, which can help hospitals to improve infection prevention and control.
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Affiliation(s)
- L Cui
- Department of Health Management, School of Medicine and Health Management, Hangzhou Normal University, Yuhang District, Hangzhou, Zhejiang, PR China
| | - A He
- Department of Health Management, School of Medicine and Health Management, Hangzhou Normal University, Yuhang District, Hangzhou, Zhejiang, PR China
| | - X Wang
- Department of Health Management, School of Medicine and Health Management, Hangzhou Normal University, Yuhang District, Hangzhou, Zhejiang, PR China
| | - Y Wang
- Department of Nosocomial Infection Prevention and Control, Zhongnan Hospital of Wuhan University and Department of Nosocomial Infection Prevention and Control, Leishenshan Hospital, Wuhan, Hubei, PR China
| | - X Huang
- Department of Health Management, School of Medicine and Health Management, Hangzhou Normal University, Yuhang District, Hangzhou, Zhejiang, PR China
| | - Z Ni
- Department of Health Management, School of Medicine and Health Management, Hangzhou Normal University, Yuhang District, Hangzhou, Zhejiang, PR China.
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Wang E, Song X, Burke A, Boca S, Prins P, He A, Unger K. DNA Damage Response Protein Mutations Associated with Response to Radiotherapy in Gastrointestinal Malignancies. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.1774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Zhou Y, He A, Zhang L, Yi G. MiR-744 mediates the Oxaliplatin chemoresistance in colorectal cancer through inhibiting BIN1. Neoplasma 2019; 67:296-303. [PMID: 31884801 DOI: 10.4149/neo_2019_190508n411] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 07/11/2019] [Indexed: 01/04/2023]
Abstract
Colorectal cancer (CRC) is one of the most common malignant cancers worldwide. However, lacking of novel and sensitive chemotherapy revealed the major challenge to improve the survival of CRC patients. The aim of this study was to explore the effect and mechanism of miR-744 on the oxaliplatin chemoresistance in CRC. Firstly, the levels of miR-744 were elevated significantly in CRC tissues from patients with oxaliplatin administration before surgery and in oxaliplatin-resistant HCT116 cells. Then, the oxaliplatin chemoresistance was enhanced by miR-744 overexpression, while was attenuated by miR-744 inhibition in HCT116 and T84 cells. Additionally, the level of BIN1 protein was found to be regulated negatively by miR-744, and BIN1 overexpression blocked the oxaliplatin chemoresistance induced by miR-744. Furthermore, BIN1 was proved to be a direct target of miR-744 by luciferase reporter assay. Taken together, these findings demonstrated that miR-744 might positively mediate the oxaliplatin chemoresistance through suppressing BIN1 expression in CRC cells, thus suggested a rationale target for the developing more effective strategies to reverse oxaliplatin resistance in CRC treatment.
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Affiliation(s)
- Y Zhou
- Xi'an No.1 Hospital, Northwest University, Xi'an, China
| | - A He
- Xi'an No.1 Hospital, Northwest University, Xi'an, China
| | - L Zhang
- Xi'an No.1 Hospital, Northwest University, Xi'an, China
| | - G Yi
- Xi'an No.1 Hospital, Northwest University, Xi'an, China
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Xiong Y, He A, Quan C. Cryptoanalysis on optical image encryption systems based on the vector decomposition technique in the Fourier domain. Appl Opt 2019; 58:3301-3309. [PMID: 31044810 DOI: 10.1364/ao.58.003301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 03/27/2019] [Indexed: 06/09/2023]
Abstract
In this paper, the security of optical cryptosystems based on the vector decomposition technique in the Fourier domain is analyzed. Compared to the conventional cryptosystem based on the equal modulus decomposition (EMD) technique, an additional EMD structure is introduced in the cascaded EMD-based cryptosystem; hence, the mask including the phase information of the Fourier spectrum is further encoded in the second EMD structure to enhance the security level. However, it is shown that the number of the private keys has not been increased in the cascaded EMD-based cryptosystem, which makes it possible to crack the cascaded EMD-based cryptosystem. Therefore, a chosen-plaintext attack (CPA) and a special attack with an arbitrarily given private key are proposed to retrieve information from encoded images obtained by the cascaded EMD-based cryptosystem. In addition, the security of the cryptosystem based on the random modulus decomposition (RMD) technique is also analyzed. Compared to the EMD-based cryptosystem in which the Fourier spectrum is decomposed into two vectors with equal moduli, the security level of the cryptosystem has been improved by using the RMD technique to decompose the spectrum into vectors with unequal moduli to decrease the number of the amplitude constraints. However, it is found that the arbitrarily given ciphertext provides the attackers enough information to retrieve the precise information of the plaintext without any knowledge of the private keys. A special attack is proposed to crack the RMD-based cryptosystem. This is the first time to report that these two cryptosystems based on the vector decomposition technique are attacked successfully. Numerical simulation is conducted to validate the feasibility and effectiveness of the proposed attacks.
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Xiong Y, He A, Quan C. Security analysis and enhancement of a cryptosystem based on phase truncation and a designed amplitude modulator. Appl Opt 2019; 58:695-703. [PMID: 30694257 DOI: 10.1364/ao.58.000695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 12/11/2018] [Indexed: 06/09/2023]
Abstract
In this paper, the security of a cryptosystem based on phase truncation and a designed amplitude modulator (AM) is evaluated. In the cryptosystem, an undercover AM used as an additional key is added to modulate the amplitude information of the spectrum in the Fourier plane. Compared to the conventional phase-truncated Fourier transform (PTFT)-based cryptosystem, the security of the cryptosystem is improved by increasing the number of unknown keys. However, it is found that the designed AM is irrelative to the plaintext, and one of the parameters in the designed AM contributes less to the security enhancement of the cryptosystem due to low key sensitivity. Based on the analysis, a special attack containing two iterative processes is proposed to crack the cryptosystem, in which the known-plaintext-attack-based iterative process I with a specific normalization operator is used to retrieve the designed AM and the amplitude-phase-retrieval-technique-based iterative process II is used to retrieve the corresponding plaintext from the arbitrarily given ciphertext with the help of the retrieved AM. In addition, an inherent drawback widely existing in PTFT-based cryptosystems is reported for the first time: most information of the original image could be retrieved using two correct phase keys (or only the first phase key) generated in the encryption process, even without the corresponding ciphertext in PTFT-based cryptosystems. To address this issue, a security-enhanced cryptosystem is proposed in this paper. Numerical simulation is carried out to demonstrate the effectiveness and feasibility of the proposed attack and cryptosystem.
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McLean K, Glasbey J, Borakati A, Brooks T, Chang H, Choi S, Goodson R, Nielsen M, Pronin S, Salloum N, Sewart E, Vanniasegaram D, Drake T, Gillies M, Harrison E, Chapman S, Khatri C, Kong C, Claireaux H, Bath M, Mohan M, McNamee L, Kelly M, Mitchell H, Fitzgerald J, Bhangu A, Nepogodiev D, Antoniou I, Dean R, Davies N, Trecarten S, Henderson I, Holmes C, Wylie J, Shuttleworth R, Jindal A, Hughes F, Gouda P, Fleck R, Hanrahan M, Karunakaran P, Chen J, Sykes M, Sethi R, Suresh S, Patel P, Patel M, Varma R, Mushtaq J, Gundogan B, Bolton W, Khan T, Burke J, Morley R, Favero N, Adams R, Thirumal V, Kennedy E, Ong K, Tan Y, Gabriel J, Bakhsh A, Low J, Yener A, Paraoan V, Preece R, Tilston T, Cumber E, Dean S, Ross T, McCance E, Amin H, Satterthwaite L, Clement K, Gratton R, Mills E, Chiu S, Hung G, Rafiq N, Hayes J, Robertson K, Dynes K, Huang H, Assadullah S, Duncumb J, Moon R, Poo S, Mehta J, Joshi K, Callan R, Norris J, Chilvers N, Keevil H, Jull P, Mallick S, Elf D, Carr L, Player C, Barton E, Martin A, Ratu S, Roberts E, Phan P, Dyal A, Rogers J, Henson A, Reid N, Burke D, Culleton G, Lynne S, Mansoor S, Brennan C, Blessed R, Holloway C, Hill A, Goldsmith T, Mackin S, Kim S, Woin E, Brent G, Coffin J, Ziff O, Momoh Z, Debenham R, Ahmed M, Yong C, Wan J, Copley H, Raut P, Chaudhry F, Nixon G, Dorman C, Tan R, Kanabar S, Canning N, Dolaghan M, Bell N, McMenamin M, Chhabra A, Duke K, Turner L, Patel T, Chew L, Mirza M, Lunawat S, Oremule B, Ward N, Khan M, Tan E, Maclennan D, McGregor R, Chisholm E, Griffin E, Bell L, Hughes B, Davies J, Haq H, Ahmed H, Ungcharoen N, Whacha C, Thethi R, Markham R, Lee A, Batt E, Bullock N, Francescon C, Davies J, Shafiq N, Zhao J, Vivekanantham S, Barai I, Allen J, Marshall D, McIntyre C, Wilson H, Ashton A, Lek C, Behar N, Davis-Hall M, Seneviratne N, Esteve L, Sirakaya M, Ali S, Pope S, Ahn J, Craig-McQuaide A, Gatfield W, Leong S, Demetri A, Kerr A, Rees C, Loveday J, Liu S, Wijesekera M, Maru D, Attalla M, Smith N, Brown D, Sritharan P, Shah A, Charavanamuttu V, Heppenstall-Harris G, Ng K, Raghvani T, Rajan N, Hulley K, Moody N, Williams M, Cotton A, Sharifpour M, Lwin K, Bright M, Chitnis A, Abdelhadi M, Semana A, Morgan F, Reid R, Dickson J, Anderson L, McMullan R, Ahern N, Asmadi A, Anderson L, Boon Xuan JL, Crozier L, McAleer S, Lees D, Adebayo A, Das M, Amphlett A, Al-Robeye A, Valli A, Khangura J, Winarski A, Ali A, Woodward H, Gouldthrope C, Turner M, Sasapu K, Tonkins M, Wild J, Robinson M, Hardie J, Heminway R, Narramore R, Ramjeeawon N, Hibberd A, Winslow F, Ho W, Chong B, Lim K, Ho S, Crewdson J, Singagireson S, Kalra N, Koumpa F, Jhala H, Soon W, Karia M, Rasiah M, Xylas D, Gilbert H, Sundar-Singh M, Wills J, Akhtar S, Patel S, Hu L, Brathwaite-Shirley C, Nayee H, Amin O, Rangan T, Turner E, McCrann C, Shepherd R, Patel N, Prest-Smith J, Auyoung E, Murtaza A, Coates A, Prys-Jones O, King M, Gaffney S, Dewdney C, Nehikhare I, Lavery J, Bassett J, Davies K, Ahmad K, Collins A, Acres M, Egerton C, Cheng K, Chen X, Chan N, Sheldon A, Khan S, Empey J, Ingram E, Malik A, Johnstone M, Goodier R, Shah J, Giles J, Sanders J, McLure S, Pal S, Rangedara A, Baker A, Asbjoernsen C, Girling C, Gray L, Gauntlett L, Joyner C, Qureshi S, Mogan Y, Ng J, Kumar A, Park J, Tan D, Choo K, Raman K, Buakuma P, Xiao C, Govinden S, Thompson O, Charalambos M, Brown E, Karsan R, Dogra T, Bullman L, Dawson P, Frank A, Abid H, Tung L, Qureshi U, Tahmina A, Matthews B, Harris R, O'Connor A, Mazan K, Iqbal S, Stanger S, Thompson J, Sullivan J, Uppal E, MacAskill A, Bamgbose F, Neophytou C, Carroll A, Rookes C, Datta U, Dhutia A, Rashid S, Ahmed N, Lo T, Bhanderi S, Blore C, Ahmed S, Shaheen H, Abburu S, Majid S, Abbas Z, Talukdar S, Burney L, Patel J, Al-Obaedi O, Roberts A, Mahboob S, Singh B, Sheth S, Karia P, Prabhudesai A, Kow K, Koysombat K, Wang S, Morrison P, Maheswaran Y, Keane P, Copley P, Brewster O, Xu G, Harries P, Wall C, Al-Mousawi A, Bonsu S, Cunha P, Ward T, Paul J, Nadanakumaran K, Tayeh S, Holyoak H, Remedios J, Theodoropoulou K, Luhishi A, Jacob L, Long F, Atayi A, Sarwar S, Parker O, Harvey J, Ross H, Rampal R, Thomas G, Vanmali P, McGowan C, Stein J, Robertson V, Carthew L, Teng V, Fong J, Street A, Thakker C, O'Reilly D, Bravo M, Pizzolato A, Khokhar H, Ryan M, Cheskes L, Carr R, Salih A, Bassiony S, Yuen R, Chrastek D, Rosen O'Sullivan H, Amajuoyi A, Wang A, Sitta O, Wye J, Qamar M, Major C, Kaushal A, Morgan C, Petrarca M, Allot R, Verma K, Dutt S, Chilima C, Peroos S, Kosasih S, Chin H, Ashken L, Pearse R, O'Loughlin R, Menon A, Singh K, Norton J, Sagar R, Jathanna N, Rothwell L, Watson N, Harding F, Dube P, Khalid H, Punjabi N, Sagmeister M, Gill P, Shahid S, Hudson-Phillips S, George D, Ashwood J, Lewis T, Dhar M, Sangal P, Rhema I, Kotecha D, Afzal Z, Syeed J, Prakash E, Jalota P, Herron J, Kimani L, Delport A, Shukla A, Agarwal V, Parthiban S, Thakur H, Cymes W, Rinkoff S, Turnbull J, Hayat M, Darr S, Khan U, Lim J, Higgins A, Lakshmipathy G, Forte B, Canning E, Jaitley A, Lamont J, Toner E, Ghaffar A, McDowell M, Salmon D, O'Carroll O, Khan A, Kelly M, Clesham K, Palmer C, Lyons R, Bell A, Chin R, Waldron R, Trimble A, Cox S, Ashfaq U, Campbell J, Holliday R, McCabe G, Morris F, Priestland R, Vernon O, Ledsam A, Vaughan R, Lim D, Bakewell Z, Hughes R, Koshy R, Jackson H, Narayan P, Cardwell A, Jubainville C, Arif T, Elliott L, Gupta V, Bhaskaran G, Odeleye A, Ahmed F, Shah R, Pickard J, Suleman Y, North A, McClymont L, Hussain N, Ibrahim I, Ng G, Wong V, Lim A, Harris L, Tharmachandirar T, Mittapalli D, Patel V, Lakhani M, Bazeer H, Narwani V, Sandhu K, Wingfield L, Gentry S, Adjei H, Bhatti M, Braganza L, Barnes J, Mistry S, Chillarge G, Stokes S, Cleere J, Wadanamby S, Bucko A, Meek J, Boxall N, Heywood E, Wiltshire J, Toh C, Ward A, Shurovi B, Horth D, Patel B, Ali B, Spencer T, Axelson T, Kretzmer L, Chhina C, Anandarajah C, Fautz T, Horst C, Thevathasan A, Ng J, Hirst F, Brewer C, Logan A, Lockey J, Forrest P, Keelty N, Wood A, Springford L, Avery P, Schulz T, Bemand T, Howells L, Collier H, Khajuria A, Tharakan R, Parsons S, Buchan A, McGalliard R, Mason J, Cundy O, Li N, Redgrave N, Watson R, Pezas T, Dennis Y, Segall E, Hameed M, Lynch A, Chamberlain M, Peck F, Neo Y, Russell G, Elseedawy M, Lee S, Foster N, Soo Y, Puan L, Dennis R, Goradia H, Qureshi A, Osman S, Reeves T, Dinsmore L, Marsden M, Lu Q, Pitts-Tucker T, Dunn C, Walford R, Heathcote E, Martin R, Pericleous A, Brzyska K, Reid K, Williams M, Wetherall N, McAleer E, Thomas D, Kiff R, Milne S, Holmes M, Bartlett J, Lucas de Carvalho J, Bloomfield T, Tongo F, Bremner R, Yong N, Atraszkiewicz B, Mehdi A, Tahir M, Sherliker G, Tear A, Pandey A, Broyd A, Omer H, Raphael M, Chaudhry W, Shahidi S, Jawad A, Gill C, Fisher IH, Adeleja I, Clark I, Aidoo-Micah G, Stather P, Salam G, Glover T, Deas G, Sim N, Obute R, Wynell-Mayow W, Sait M, Mitha N, de Bernier G, Siddiqui M, Shaunak R, Wali A, Cuthbert G, Bhudia R, Webb E, Shah S, Ansari N, Perera M, Kelly N, McAllister R, Stanley G, Keane C, Shatkar V, Maxwell-Armstrong C, Henderson L, Maple N, Manson R, Adams R, Semple E, Mills M, Daoub A, Marsh A, Ramnarine A, Hartley J, Malaj M, Jewell P, Whatling E, Hitchen N, Chen M, Goh B, Fern J, Rogers S, Derbyshire L, Robertson D, Abuhussein N, Deekonda P, Abid A, Harrison P, Aildasani L, Turley H, Sherif M, Pandey G, Filby J, Johnston A, Burke E, Mohamud M, Gohil K, Tsui A, Singh R, Lim S, O'Sullivan K, McKelvey L, O'Neill S, Roberts H, Brown F, Cao Y, Buckle R, Liew Y, Sii S, Ventre C, Graham C, Filipescu T, Yousif A, Dawar R, Wright A, Peters M, Varley R, Owczarek S, Hartley S, Khattak M, Iqbal A, Ali M, Durrani B, Narang Y, Bethell G, Horne L, Pinto R, Nicholls K, Kisyov I, Torrance H, English W, Lakhani S, Ashraf S, Venn M, Elangovan V, Kazmi Z, Brecher J, Sukumar S, Mastan A, Mortimer A, Parker J, Boyle J, Elkawafi M, Beckett J, Mohite A, Narain A, Mazumdar E, Sreh A, Hague A, Weinberg D, Fletcher L, Steel M, Shufflebotham H, Masood M, Sinha Y, Jenvey C, Kitt H, Slade R, Craig A, Deall C, Reakes T, Chervenkoff J, Strange E, O'Bryan M, Murkin C, Joshi D, Bergara T, Naqib S, Wylam D, Scotcher S, Hewitt C, Stoddart M, Kerai A, Trist A, Cole S, Knight C, Stevens S, Cooper G, Ingham R, Dobson J, O'Kane A, Moradzadeh J, Duffy A, Henderson C, Ashraf S, McLaughin C, Hoskins T, Reehal R, Bookless L, McLean R, Stone E, Wright E, Abdikadir H, Roberts C, Spence O, Srikantharajah M, Ruiz E, Matthews J, Gardner E, Hester E, Naran P, Simpson R, Minhas M, Cornish E, Semnani S, Rojoa D, Radotra A, Eraifej J, Eparh K, Smith D, Mistry B, Hickling S, Din W, Liu C, Mithrakumar P, Mirdavoudi V, Rashid M, Mcgenity C, Hussain O, Kadicheeni M, Gardner H, Anim-Addo N, Pearce J, Aslanyan A, Ntala C, Sorah T, Parkin J, Alizadeh M, White A, Edozie F, Johnston J, Kahar A, Navayogaarajah V, Patel B, Carter D, Khonsari P, Burgess A, Kong C, Ponweera A, Cody A, Tan Y, Ng A, Croall A, Allan C, Ng S, Raghuvir V, Telfer R, Greenhalgh A, McKerr C, Edison M, Patel B, Dear K, Hardy M, Williams P, Hassan S, Sajjad U, O'Neill E, Lopes S, Healy L, Jamal N, Tan S, Lazenby D, Husnoo S, Beecroft S, Sarvanandan T, Weston C, Bassam N, Rabinthiran S, Hayat U, Ng L, Varma D, Sukkari M, Mian A, Omar A, Kim J, Sellathurai J, Mahmood J, O'Connell C, Bose R, Heneghan H, Lalor P, Matheson J, Doherty C, Cullen C, Cooper D, Angelov S, Drislane C, Smith A, Kreibich A, Palkhi E, Durr A, Lotfallah A, Gold D, Mckean E, Dhanji A, Anilkumar A, Thacoor A, Siddiqui Z, Lim S, Piquet A, Anderson S, McCormack D, Gulati J, Ibrahim A, Murray S, Walsh S, McGrath A, Ziprin P, Chua E, Lou C, Bloomer J, Paine H, Osei-Kuffour D, White C, Szczap A, Gokani S, Patel K, Malys M, Reed A, Torlot G, Cumber E, Charania A, Ahmad S, Varma N, Cheema H, Austreng L, Petra H, Chaudhary M, Zegeye M, Cheung F, Coffey D, Heer R, Singh S, Seager E, Cumming S, Suresh R, Verma S, Ptacek I, Gwozdz A, Yang T, Khetarpal A, Shumon S, Fung T, Leung W, Kwang P, Chew L, Loke W, Curran A, Chan C, McGarrigle C, Mohan K, Cullen S, Wong E, Toale C, Collins D, Keane N, Traynor B, Shanahan D, Yan A, Jafree D, Topham C, Mitrasinovic S, Omara S, Bingham G, Lykoudis P, Miranda B, Whitehurst K, Kumaran G, Devabalan Y, Aziz H, Shoa M, Dindyal S, Yates J, Bernstein I, Rattan G, Coulson R, Stezaker S, Isaac A, Salem M, McBride A, McFarlane H, Yow L, MacDonald J, Bartlett R, Turaga S, White U, Liew W, Yim N, Ang A, Simpson A, McAuley D, Craig E, Murphy L, Shepherd P, Kee J, Abdulmajid A, Chung A, Warwick H, Livesey A, Holton P, Theodoreson M, Jenkin S, Turner J, Entwisle J, Marchal S, O'Connor S, Blege H, Aithie J, Sabine L, Stewart G, Jackson S, Kishore A, Lankage C, Acquaah F, Joyce H, McKevitt K, Coffey C, Fawaz A, Dolbec K, O'Sullivan D, Geraghty J, Lim E, Bolton L, FitzPatrick D, Robinson C, Ramtoola T, Collinson S, Grundy L, McEnhill P, Harbhajan Singh G, Loughran D, Golding D, Keeling R, Williams R, Whitham R, Yoganathan S, Nachiappan R, Egan R, Owasil R, Kwan M, He A, Goh R, Bhome R, Wilson H, Teoh P, Raji K, Jayakody N, Matthams J, Chong J, Luk C, Greig R, Trail M, Charalambous G, Rocke A, Gardiner N, Bulley F, Warren N, Brennan E, Fergurson P, Wilson R, Whittingham H, Brown E, Khanijau R, Gandhi K, Morris S, Boulton A, Chandan N, Barthorpe A, Maamari R, Sandhu S, McCann M, Higgs L, Balian V, Reeder C, Diaper C, Sale T, Ali H, Archer C, Clarke A, Heskin J, Hurst P, Farmer J, O'Flynn L, Doan L, Shuker B, Stott G, Vithanage N, Hoban K, Nesargikar P, Kennedy H, Grossart C, Tan E, Roy C, Sim P, Leslie K, Sim D, Abul M, Cody N, Tay A, Woon E, Sng S, Mah J, Robson J, Shakweh E, Wing V, Mills H, Li M, Barrow T, Balaji S, Jordan H, Phillips C, Naveed H, Hirani S, Tai A, Ratnakumaran R, Sahathevan A, Shafi A, Seedat M, Weaver R, Batho A, Punj R, Selvachandran H, Bhatt N, Botchey S, Khonat Z, Brennan K, Morrison C, Devlin E, Linton A, Galloway E, McGarvie S, Ramsay N, McRobbie H, Whewell H, Dean W, Nelaj S, Eragat M, Mishra A, Kane T, Zuhair M, Wells M, Wilkinson D, Woodcock N, Sun E, Aziz N, Ghaffar MKA. Critical care usage after major gastrointestinal and liver surgery: a prospective, multicentre observational study. Br J Anaesth 2019; 122:42-50. [PMID: 30579405 DOI: 10.1016/j.bja.2018.07.029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 07/19/2018] [Accepted: 07/23/2018] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Patient selection for critical care admission must balance patient safety with optimal resource allocation. This study aimed to determine the relationship between critical care admission, and postoperative mortality after abdominal surgery. METHODS This prespecified secondary analysis of a multicentre, prospective, observational study included consecutive patients enrolled in the DISCOVER study from UK and Republic of Ireland undergoing major gastrointestinal and liver surgery between October and December 2014. The primary outcome was 30-day mortality. Multivariate logistic regression was used to explore associations between critical care admission (planned and unplanned) and mortality, and inter-centre variation in critical care admission after emergency laparotomy. RESULTS Of 4529 patients included, 37.8% (n=1713) underwent planned critical care admissions from theatre. Some 3.1% (n=86/2816) admitted to ward-level care subsequently underwent unplanned critical care admission. Overall 30-day mortality was 2.9% (n=133/4519), and the risk-adjusted association between 30-day mortality and critical care admission was higher in unplanned [odds ratio (OR): 8.65, 95% confidence interval (CI): 3.51-19.97) than planned admissions (OR: 2.32, 95% CI: 1.43-3.85). Some 26.7% of patients (n=1210/4529) underwent emergency laparotomies. After adjustment, 49.3% (95% CI: 46.8-51.9%, P<0.001) were predicted to have planned critical care admissions, with 7% (n=10/145) of centres outside the 95% CI. CONCLUSIONS After risk adjustment, no 30-day survival benefit was identified for either planned or unplanned postoperative admissions to critical care within this cohort. This likely represents appropriate admission of the highest-risk patients. Planned admissions in selected, intermediate-risk patients may present a strategy to mitigate the risk of unplanned admission. Substantial inter-centre variation exists in planned critical care admissions after emergency laparotomies.
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Xiong Y, He A, Quan C. Hybrid attack on an optical cryptosystem based on phase-truncated Fourier transforms and a random amplitude mask. Appl Opt 2018; 57:6010-6016. [PMID: 30118027 DOI: 10.1364/ao.57.006010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 06/18/2018] [Indexed: 06/08/2023]
Abstract
In this paper, the security of a cryptosystem based on phase-truncated Fourier transforms (PTFTs) and a random amplitude mask (RAM) is evaluated. In the cryptosystem, fake keys used as encryption keys in the second PTFT-based structure are generated by the first PTFT-based structure in which the RAM is encoded by random phase masks (RPMs) used as public keys. Compared to the classical PTFT-based encryption scheme, the security level of the cryptosystem is improved by using cascaded PTFTs to encode the encryption keys and the plaintext simultaneously. However, it is found that a known plaintext-ciphertext pair can provide enough constraints in the iterative process to retrieve the fake keys, which then can be used to retrieve unknown arbitrary plaintext from the corresponding ciphertext. Based on the analysis, we propose a specific attack based on hybrid iterative processes to break the cryptosystem. Two iterative processes with different constraints are involved in the proposed attack. The first known-plaintext-attack (KPA)-based iterative process is used to retrieve two fake keys with the help of two public keys and a known plaintext-ciphertext pair, while the second amplitude-phase retrieval algorithm-based iterative process with a median filter is employed to retrieve the plaintext from the corresponding ciphertext using two retrieval fake keys. To the best of our knowledge, it is the first time that the cryptosystem is attacked by the KPA-based iterative algorithm successfully. Numerical simulation results validate the feasibility and effectiveness of the proposed attack.
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He A, Ning Y, Wen Y, Cai Y, Xu K, Cai Y, Han J, Liu L, Du Y, Liang X, Li P, Fan Q, Hao J, Wang X, Guo X, Ma T, Zhang F. Use of integrative epigenetic and mRNA expression analyses to identify significantly changed genes and functional pathways in osteoarthritic cartilage. Bone Joint Res 2018; 7:343-350. [PMID: 29922454 PMCID: PMC5987683 DOI: 10.1302/2046-3758.75.bjr-2017-0284.r1] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Aim Osteoarthritis (OA) is caused by complex interactions between genetic and environmental factors. Epigenetic mechanisms control the expression of genes and are likely to regulate the OA transcriptome. We performed integrative genomic analyses to define methylation-gene expression relationships in osteoarthritic cartilage. Patients and Methods Genome-wide DNA methylation profiling of articular cartilage from five patients with OA of the knee and five healthy controls was conducted using the Illumina Infinium HumanMethylation450 BeadChip (Illumina, San Diego, California). Other independent genome-wide mRNA expression profiles of articular cartilage from three patients with OA and three healthy controls were obtained from the Gene Expression Omnibus (GEO) database. Integrative pathway enrichment analysis of DNA methylation and mRNA expression profiles was performed using integrated analysis of cross-platform microarray and pathway software. Gene ontology (GO) analysis was conducted using the Database for Annotation, Visualization and Integrated Discovery (DAVID). Results We identified 1265 differentially methylated genes, of which 145 are associated with significant changes in gene expression, such as DLX5, NCOR2 and AXIN2 (all p-values of both DNA methylation and mRNA expression < 0.05). Pathway enrichment analysis identified 26 OA-associated pathways, such as mitogen-activated protein kinase (MAPK) signalling pathway (p = 6.25 × 10-4), phosphatidylinositol (PI) signalling system (p = 4.38 × 10-3), hypoxia-inducible factor 1 (HIF-1) signalling pathway (p = 8.63 × 10-3 pantothenate and coenzyme A (CoA) biosynthesis (p = 0.017), ErbB signalling pathway (p = 0.024), inositol phosphate (IP) metabolism (p = 0.025), and calcium signalling pathway (p = 0.032). Conclusion We identified a group of genes and biological pathwayswhich were significantly different in both DNA methylation and mRNA expression profiles between patients with OA and controls. These results may provide new clues for clarifying the mechanisms involved in the development of OA. Cite this article: A. He, Y. Ning, Y. Wen, Y. Cai, K. Xu, Y. Cai, J. Han, L. Liu, Y. Du, X. Liang, P. Li, Q. Fan, J. Hao, X. Wang, X. Guo, T. Ma, F. Zhang. Use of integrative epigenetic and mRNA expression analyses to identify significantly changed genes and functional pathways in osteoarthritic cartilage. Bone Joint Res 2018;7:343–350. DOI: 10.1302/2046-3758.75.BJR-2017-0284.R1.
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Affiliation(s)
- A He
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Y Ning
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Y Wen
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Y Cai
- Department of Orthopaedics, The First Affiliated Hospital, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - K Xu
- Department of Joint Surgery, Xi'an Hong-Hui Hospital, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Y Cai
- Department of Joint Surgery, Xi'an Hong-Hui Hospital, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - J Han
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - L Liu
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Y Du
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - X Liang
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - P Li
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Q Fan
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - J Hao
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - X Wang
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - X Guo
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - T Ma
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - F Zhang
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, China
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Xiong Y, He A, Quan C. Security analysis of a double-image encryption technique based on an asymmetric algorithm. J Opt Soc Am A Opt Image Sci Vis 2018; 35:320-326. [PMID: 29400881 DOI: 10.1364/josaa.35.000320] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Accepted: 12/26/2017] [Indexed: 06/07/2023]
Abstract
In this paper, we evaluate the security of a double-image encryption technique based on an asymmetric algorithm. Compared with traditional cryptosystems based on a phase-truncated Fourier transform, the technique is able to improve the security of the encryption by combining a joint transform correlator; consequently, the encryption scheme is immune to some common attacks. We propose a special attack based on a phase retrieval algorithm with median filtering and normalization operation to break the cryptosystem. Low key sensitivity of a position parameter set has been found and an additional constraint is utilized to improve the attack to simplify the process and further decrease the computational time. Numerical simulation results show that the cryptosystem is vulnerable to the proposed special attack.
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Wang W, Yu Y, Hao J, Wen Y, Han J, Hou W, Liu R, Zhao B, He A, Li P, Fan Q, Wu C, Wang S, Wang X, Ning Y, Guo X, Zhang F. Genome-wide DNA methylation profiling of articular cartilage reveals significant epigenetic alterations in Kashin-Beck disease and osteoarthritis. Osteoarthritis Cartilage 2017; 25:2127-2133. [PMID: 28818737 DOI: 10.1016/j.joca.2017.08.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [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: 02/23/2017] [Revised: 06/26/2017] [Accepted: 08/04/2017] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To determine genome-wide DNA methylation profiles of knee cartilage from patients with Kashin-Beck disease (KBD) and osteoarthritis (OA). METHOD Knee cartilage was collected from 14 grade III KBD patients, 5 primary OA patients and 13 healthy subjects. The genome-wide methylation profiles of 5 KBD cartilage, 5 OA cartilage and 5 normal cartilage were determined by Illumina HumanMethylation450 array. Illumina Methylation Analyzer package was employed for identifying differentially methylated CpG sites. Functional annotation and enrichment analysis of differentially methylated genes (DMG) were conducted using GeneRIF database, Ingenuity Pathway Analysis (IPA) and The Database for Annotation, Visualization and Integrated Discovery (DAVID). Mass spectrometry (MS) and immunohistochemistry (IHC) were conducted to validate the functional relevance of identified KBD associated gene. RESULTS We identified a total of 1212 differentially methylated CpG sites in KBD vs Normal, annotated to 264 hypermethylated and 368 hypomethylated genes. Comparing the DNA methylation profiles of KBD vs Normal and OA vs Normal detected overlap of 367 differentially methylated CpG sites (annotated to 182 genes) as well as 845 KBD-specific differentially methylated CpG sites (annotated to 471 unique genes). MS and IHC confirmed the hypermethylation status and decreased protein expression of HAPLN1 gene in KBD cartilage. CONCLUSION Our data implicate epigenetic dysregulation of a host of genes in KBD and OA. Furthermore, we observed common causal epigenetic changes shared by KBD and OA.
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Affiliation(s)
- W Wang
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University, PR China
| | - Y Yu
- School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China.
| | - J Hao
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University, PR China
| | - Y Wen
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University, PR China
| | - J Han
- School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China
| | - W Hou
- Osteonecrosis and Joint Reconstruction Ward, Department of Joint Surgery, HongHui Hospital, Health Science Center, Xi'an Jiaotong University, PR China
| | - R Liu
- Department of Orthopedics, Second Affiliated Hospital of Health Science Center of Xi'an Jiaotong University, Xi'an, Shaanxi, PR China
| | - B Zhao
- Department of Orthopedics, Second Affiliated Hospital of Health Science Center of Xi'an Jiaotong University, Xi'an, Shaanxi, PR China
| | - A He
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University, PR China
| | - P Li
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University, PR China
| | - Q Fan
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University, PR China
| | - C Wu
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University, PR China
| | - S Wang
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University, PR China
| | - X Wang
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University, PR China
| | - Y Ning
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University, PR China
| | - X Guo
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University, PR China
| | - F Zhang
- School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, PR China.
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Wang W, Huang S, Hou W, Liu Y, Fan Q, He A, Wen Y, Hao J, Guo X, Zhang F. Integrative analysis of GWAS, eQTLs and meQTLs data suggests that multiple gene sets are associated with bone mineral density. Bone Joint Res 2017; 6:572-576. [PMID: 28978616 PMCID: PMC5670365 DOI: 10.1302/2046-3758.610.bjr-2017-0113.r1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2017] [Accepted: 07/05/2017] [Indexed: 11/15/2022] Open
Abstract
Objectives Several genome-wide association studies (GWAS) of bone mineral density (BMD) have successfully identified multiple susceptibility genes, yet isolated susceptibility genes are often difficult to interpret biologically. The aim of this study was to unravel the genetic background of BMD at pathway level, by integrating BMD GWAS data with genome-wide expression quantitative trait loci (eQTLs) and methylation quantitative trait loci (meQTLs) data Method We employed the GWAS datasets of BMD from the Genetic Factors for Osteoporosis Consortium (GEFOS), analysing patients’ BMD. The areas studied included 32 735 femoral necks, 28 498 lumbar spines, and 8143 forearms. Genome-wide eQTLs (containing 923 021 eQTLs) and meQTLs (containing 683 152 unique methylation sites with local meQTLs) data sets were collected from recently published studies. Gene scores were first calculated by summary data-based Mendelian randomisation (SMR) software and meQTL-aligned GWAS results. Gene set enrichment analysis (GSEA) was then applied to identify BMD-associated gene sets with a predefined significance level of 0.05. Results We identified multiple gene sets associated with BMD in one or more regions, including relevant known biological gene sets such as the Reactome Circadian Clock (GSEA p-value = 1.0 × 10-4 for LS and 2.7 × 10-2 for femoral necks BMD in eQTLs-based GSEA) and insulin-like growth factor receptor binding (GSEA p-value = 5.0 × 10-4 for femoral necks and 2.6 × 10-2 for lumbar spines BMD in meQTLs-based GSEA). Conclusion Our results provided novel clues for subsequent functional analysis of bone metabolism, and illustrated the benefit of integrating eQTLs and meQTLs data into pathway association analysis for genetic studies of complex human diseases. Cite this article: W. Wang, S. Huang, W. Hou, Y. Liu, Q. Fan, A. He, Y. Wen, J. Hao, X. Guo, F. Zhang. Integrative analysis of GWAS, eQTLs and meQTLs data suggests that multiple gene sets are associated with bone mineral density. Bone Joint Res 2017;6:572–576.
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Affiliation(s)
- W Wang
- School of Public Health, Department of Breast Surgery, First Affiliated Hospital, Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - S Huang
- Department of Radiotherapy, Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - W Hou
- Department of Joint Surgery, Osteonecrosis and Joint Reconstruction Ward, HongHui Hospital, Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Y Liu
- Department of Breast Surgery, First Affiliated Hospital, Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Q Fan
- School of Public Health, Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - A He
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Y Wen
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - J Hao
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - X Guo
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - F Zhang
- Key Laboratory of Trace Elements and Endemic Diseases of National Health and Family Planning Commission, School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi, China
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Peng L, He A, Tang J, Li Y. ISQUA17-2743APPLICATION OF QUALITY CONTROL CIRCLE TO DEVELOP AND APPLY A NEW POSTOPERATIVE FLAP OBSERVATION STANDARD. Int J Qual Health Care 2017. [DOI: 10.1093/intqhc/mzx125.76] [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: 11/12/2022] Open
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He A, Deepan B, Quan C. Simplified paraboloid phase model-based phase tracker for demodulation of a single complex fringe. Appl Opt 2017; 56:7217-7224. [PMID: 29047983 DOI: 10.1364/ao.56.007217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Accepted: 08/07/2017] [Indexed: 06/07/2023]
Abstract
A regularized phase tracker (RPT) is an effective method for demodulation of single closed-fringe patterns. However, lengthy calculation time, specially designed scanning strategy, and sign-ambiguity problems caused by noise and saddle points reduce its effectiveness, especially for demodulating large and complex fringe patterns. In this paper, a simplified paraboloid phase model-based regularized phase tracker (SPRPT) is proposed. In SPRPT, first and second phase derivatives are pre-determined by the density-direction-combined method and discrete higher-order demodulation algorithm, respectively. Hence, cost function is effectively simplified to reduce the computation time significantly. Moreover, pre-determined phase derivatives improve the robustness of the demodulation of closed, complex fringe patterns. Thus, no specifically designed scanning strategy is needed; nevertheless, it is robust against the sign-ambiguity problem. The paraboloid phase model also assures better accuracy and robustness against noise. Both the simulated and experimental fringe patterns (obtained using electronic speckle pattern interferometry) are used to validate the proposed method, and a comparison of the proposed method with existing RPT methods is carried out. The simulation results show that the proposed method has achieved the highest accuracy with less computational time. The experimental result proves the robustness and the accuracy of the proposed method for demodulation of noisy fringe patterns and its feasibility for static and dynamic applications.
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He A, Yohannes A, Feng XT, Yao S. Processing of waste material of radix physochlainae for preparation of fine chemicals after extraction. ACTA ACUST UNITED AC 2017. [DOI: 10.1088/1757-899x/170/1/012034] [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: 11/11/2022]
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Affiliation(s)
- A. He
- Department of Dermatology; Johns Hopkins University School of Medicine; Baltimore MD U.S.A
| | - J.G. Zampella
- Department of Dermatology; Johns Hopkins University School of Medicine; Baltimore MD U.S.A
| | - S.G. Kwatra
- Department of Dermatology; Johns Hopkins University School of Medicine; Baltimore MD U.S.A
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Meng F, Zhang Z, Chen W, Huang G, He A, Hou C, Long Y, Yang Z, Zhang Z, Liao W. MicroRNA-320 regulates matrix metalloproteinase-13 expression in chondrogenesis and interleukin-1β-induced chondrocyte responses. Osteoarthritis Cartilage 2016; 24:932-41. [PMID: 26774733 DOI: 10.1016/j.joca.2015.12.012] [Citation(s) in RCA: 97] [Impact Index Per Article: 12.1] [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: 08/04/2015] [Revised: 12/11/2015] [Accepted: 12/20/2015] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Metalloproteinases (MMPs) are key regulators of osteoarthritis (OA) and collagen degradation and have been shown to participate in endochondral ossification. The aim of this study was to determine whether microRNA-320 (miR-320) regulates the expression of MMP-13 in chondrogenesis and inflammation. EXPERIMENTAL DESIGN miR-320 expression was assessed in vitro, in the ATDC5 cell model of chondrogenesis and in interleukin-1β (IL-1β)-treated primary mouse chondrocytes (PMCs), and in vivo, in normal and OA human cartilage by in situ hybridization. ATDC5 and PMCs were transfected with miR-320 or its antisense inhibitor (anti-miR-320), respectively. The roles of activated MAP kinases (MAPK) and NF-κB were evaluated by using specific inhibitors. Direct interaction between miR-320 and its putative binding site in the 3'-untranslated region (3'-UTR) of Mmp-13 mRNA was confirmed by the luciferase reporter assay. RESULTS miR-320 expression was elevated in chondrogenic and hypertrophic ATDC5, while significantly reduced in OA cartilage compared with normal cartilage. Stimulation with IL-1β led to a significant reduction in miR-320 expression in PMCs. Upregulation of MMP-13 expression was correlated with downregulation of miR-320 expression in both PMCs and ATDC5. Overexpression of miR-320 suppressed the activity of a reporter construct containing the 3'-UTR and inhibited MMP-13 expression in both ATDC5 and IL-1β-treated PMCs, while treatment with anti-miR-320 enhanced MMP-13 expression. NF-κB and MAPK activation downregulated miR-320 expression. CONCLUSION Cartilage development and homeostasis are influenced by miR-320, which directly targets MMP-13 and regulates chondrogenesis and the IL-1β-stimulated catabolic effect in mouse chondrocytes.
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Affiliation(s)
- F Meng
- Department of Joint Surgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Z Zhang
- Department of Joint Surgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - W Chen
- Department of Joint Surgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - G Huang
- Department of Joint Surgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - A He
- Department of Joint Surgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - C Hou
- Department of Joint Surgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Y Long
- Department of Joint Surgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Z Yang
- Department of Joint Surgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Z Zhang
- Department of Joint Surgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China.
| | - W Liao
- Department of Joint Surgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China.
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Aronson BE, Rabello Aronson S, Berkhout RP, Chavoushi SF, He A, Pu WT, Verzi MP, Krasinski SD. GATA4 represses an ileal program of gene expression in the proximal small intestine by inhibiting the acetylation of histone H3, lysine 27. Biochim Biophys Acta 2014; 1839:1273-82. [PMID: 24878542 DOI: 10.1016/j.bbagrm.2014.05.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Revised: 04/29/2014] [Accepted: 05/19/2014] [Indexed: 11/17/2022]
Abstract
GATA4 is expressed in the proximal 85% of small intestine where it promotes a proximal intestinal ('jejunal') identity while repressing a distal intestinal ('ileal') identity, but its molecular mechanisms are unclear. Here, we tested the hypothesis that GATA4 promotes a jejunal versus ileal identity in mouse intestine by directly activating and repressing specific subsets of absorptive enterocyte genes by modulating the acetylation of histone H3, lysine 27 (H3K27), a mark of active chromatin, at sites of GATA4 occupancy. Global analysis of mouse jejunal epithelium showed a statistically significant association of GATA4 occupancy with GATA4-regulated genes. Occupancy was equally distributed between down- and up-regulated targets, and occupancy sites showed a dichotomy of unique motif over-representation at down- versus up-regulated genes. H3K27ac enrichment at GATA4-binding loci that mapped to down-regulated genes (activation targets) was elevated, changed little upon conditional Gata4 deletion, and was similar to control ileum, whereas H3K27ac enrichment at GATA4-binding loci that mapped to up-regulated genes (repression targets) was depleted, increased upon conditional Gata4 deletion, and approached H3K27ac enrichment in wild-type control ileum. These data support the hypothesis that GATA4 both activates and represses intestinal genes, and show that GATA4 represses an ileal program of gene expression in the proximal small intestine by inhibiting the acetylation of H3K27.
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Affiliation(s)
- B E Aronson
- Children's Hospital Boston, and Harvard Medical School, Boston, MA, USA; Academic Medical Center Amsterdam, Emma Children's Hospital, Amsterdam, the Netherlands
| | - S Rabello Aronson
- Center for Complex Network Research (CCNR), Northeastern University, Boston, MA, USA
| | - R P Berkhout
- Erasmus Medical Center, Rotterdam, the Netherlands
| | - S F Chavoushi
- Utrecht University and University Medical Center Utrecht, Utrecht, the Netherlands; Department of Pharmacy, Meander Medical Center, Amersfoort, the Netherlands
| | - A He
- Children's Hospital Boston, and Harvard Medical School, Boston, MA, USA
| | - W T Pu
- Children's Hospital Boston, and Harvard Medical School, Boston, MA, USA
| | - M P Verzi
- Division of the Life Sciences, Department of Genetics, Rutgers University, Piscataway, NJ, USA
| | - S D Krasinski
- Children's Hospital Boston, and Harvard Medical School, Boston, MA, USA; Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, USA.
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Wei G, Arya R, He A, Eisenstein R, Ritz Z, Ohman Strickland P, McCoy J. How Does Emergency Department Crowding, as Measured by National Emergency Department Overcrowding Scale, Affect Medical Student Test Score and Clerkship Evaluation? Ann Emerg Med 2013. [DOI: 10.1016/j.annemergmed.2013.07.205] [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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Qi W, Yao Y, Shen Z, He A, Lin F. Doublet versus SINGLE Cytotoxic Agent as First-Line Treatment for Elderly Patients with Advanced Non-Small-Cell Lung Cancer: A Systematic Review and Meta-Analysis. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)33774-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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He A, Xu S, Foroughi-Abari A, Karpuzov D. Depth profiling of NbxO/W multilayers: effect of primary ion beam species (O2+, Ar+ and Cs+). SURF INTERFACE ANAL 2012. [DOI: 10.1002/sia.4849] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- A. He
- Alberta Centre for Surface Engineering and Science; University of Alberta; Edmonton; T6G 2 V4; Canada
| | - S. Xu
- Alberta Centre for Surface Engineering and Science; University of Alberta; Edmonton; T6G 2 V4; Canada
| | - A. Foroughi-Abari
- Department of Chemical and Materials Engineering; University of Alberta; Edmonton; T6G 2 V4; Canada
| | - D. Karpuzov
- Alberta Centre for Surface Engineering and Science; University of Alberta; Edmonton; T6G 2 V4; Canada
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Luo X, Fang F, Sun J, Xie J, Lee A, Zhang Q, Yu C, Breithardt O, Schiessl S, Schmid M, Seltmann M, Klinghammer L, Zeissler C, Kuechle M, Daniel W, Ege M, Guray U, Guray Y, Demirkan B, Kisacik H, Kim SE, Hong JY, Lee JH, Park DG, Han KR, Oh DJ, Ege M, Demirkan B, Guray U, Guray Y, Tufekcioglu O, Kisacik H, Cozma DC, Mornos C, Ionac A, Petrescu L, Tutuianu C, Dragulescu SI, Guimaraes L, Tavares G, Rodrigues A, Nagamatsu C, Fischer C, Vieira M, Oliveira W, Wilberg T, Cordovil A, Morhy S, Muraru D, Peluso M, Dal Bianco L, Beraldo M, Solda' E, Tuveri M, Cucchini U, Al Mamary A, Badano L, Iliceto S, Pizzuti A, Mabritto B, Derosa C, Tomasello A, Rovere M, Parrini I, Conte M, Lareva N, Govorin A, Cooper R, Sharif J, Somauroo JD, Hung JD, Porcelli V, Skevington R, Shahzad A, Scott S, Lindqvist P, Soderberg S, Gonzalez M, Tossavainen E, Henein M, Nciri N, Saad H, Nawas S, Ali A, Youssufzay A, Safi A, Faruk S, Yurdakul S, Erdemir V, Tayyareci Y, Yildirimturk O, Memic K, Aytekin V, Gurel M, Aytekin S, Przewlocka-Kosmala M, Cielecka-Prynda M, Mysiak A, Kosmala W, Mornos C, Ionac A, Pescariu S, Cozma D, Mornos A, Dragulescu S, Maurea N, Tocchetti CG, Coppola C, Quintavalle C, Rea D, Barbieri A, Piscopo G, Arra C, Condorelli G, Iaffaioli R, Dalen H, Thorstensen A, Moelmen H, Torp H, Stoylen A, Augustine D, Basagiannis C, Suttie J, Cox P, Aitzaz R, Lewandowski A, Lazdam M, Holloway C, Becher H, Leeson P, Radovanovic S, Djokovic A, Todic B, Zdravkovic M, Zaja-Simic M, Banicevic S, Lisulov-Popovic D, Krotin M, Grapsa J, O'regan D, Dawson D, Durighel G, Howard L, Gibbs J, Nihoyannopoulos P, Tulunay Kaya C, Kilickap M, Kurklu H, Ozbek N, Koca C, Kozluca V, Esenboga K, Erol C, Kusmierczyk-Droszcz B, Kowalik E, Niewiadomska J, Hoffman P, Satendra M, Sargento L, Lopes S, Longo S, Lousada N, Palma Reis R, Chillo P, Rieck A, Lwakatare J, Lutale J, Gerdts E, Bonapace S, Molon G, Targher G, Rossi A, Lanzoni L, Canali G, Campopiano E, Zenari L, Bertolini L, Barbieri E, Hristova K, Vladiomirova-Kitova L, Katova T, Nikolov F, Nikolov P, Georgieva S, Simova I, Kostova V, Kuznetsov VA, Krinochkin DV, Chandraratna PA, Pak YA, Zakharova EH, Plusnin AV, Semukhin MV, Gorbatenko EA, Yaroslavskaya EI, Bedetti G, Gargani L, Scalese M, Pizzi C, Sicari R, Picano E, Reali M, Canali E, Cimino S, Francone M, Mancone M, Scardala R, Boccalini F, Hiramoto Y, Frustaci A, Agati L, Savino K, Lilli A, Bordoni E, Riccini C, Ambrosio G, Silva D, Cortez-Dias N, Carrilho-Ferreira P, Jorge C, Silva-Marques J, Magalhaes A, Santos L, Ribeiro S, Pinto F, Nunes Diogo A, Kinova E, Zlatareva N, Goudev A, Bonanad C, Lopez-Lereu M, Monmeneu J, Bodi V, Sanchis J, Nunez J, Chaustre F, Llacer A, Muraru D, Beraldo M, Solda' E, Ermacora D, Cucchini U, Dal Bianco L, Peluso D, Di Lazzari M, Badano L, Iliceto S, Meimoun P, Elmkies F, Benali T, Boulanger J, Zemir H, Clerc J, Luycx-Bore A, Velasco Del Castillo MS, Cacicedo Fernandez De Bobadilla A, Onaindia Gandarias J, Telleria Arrieta M, Zugazabeitia Irazabal G, Quintana Raczka O, Rodriguez Sanchez I, Romero Pereiro A, Laraudogoitia Zaldumbide E, Lekuona Goya I, Bonello B, El Louali E, Fouilloux V, Kammache I, Ovaert C, Kreitmann B, Fraisse A, Migliore R, Adaniya M, Barranco M, Miramont G, Tamagusuku H, Alassar A, Sharma R, Marciniak A, Valencia O, Abdulkareem N, Jahangiri M, Jander N, Kienzle R, Gohlke-Baerwolf C, Gohlke H, Neumann FJ, Minners J, Valbuena S, De Torres F, Lopez T, Gomez JJ, Guzman G, Dominguez F, Refoyo E, Moreno M, Lopez-Sendon JL, Ancona R, Comenale Pinto S, Caso P, Di Salvo G, Severino S, Cavallaro M, Calabro R, Enache R, Muraru D, Piazza R, Roman-Pognuz A, Popescu B, Calin A, Beladan C, Purcarea F, Nicolosi G, Ginghina C, Savu O, Enache R, Popescu B, Calin A, Beladan C, Rosca M, Jurcut R, Serban M, Dorobantu L, Ginghina C, Donal E, Mascle S, Thebault C, Veillard D, Hamonic H, Leguerrier A, Corbineau H, Popa BA, Diena M, Bogdan A, Benea D, Lanzillo G, Casati V, Novelli E, Popa A, Cerin G, Gual Capllonch F, Teis A, Lopez Ayerbe J, Ferrer E, Vallejo N, Gomez Denia E, Bayes Genis A, Spethmann S, Schattke S, Baldenhofer G, Stangl V, Laule M, Baumann G, Stangl K, Knebel F, Labata C, Vallejo N, Gomez Denia E, Garcia Alonso C, Ferrer E, Gual F, Lopez Ayerbe J, Teis A, Nunez Aragon R, Bayes Genis A, Satendra M, Sargento L, Sousa C, Lousada N, Palma Reis R, Vasile AI, Dorobantu M, Iorgulescu C, Bogdan S, Constantinescu D, Caldararu C, Tautu O, Vatasescu R, Badran H, Elnoamany MF, Ayad M, Elshereef A, Farhan A, Nassar Y, Yacoub M, Costabel J, Avegliano G, Elissamburu P, Thierer J, Castro F, Huguet M, Frangi A, Ronderos R, Prinz C, Van Buuren F, Faber L, Bitter T, Bogunovic N, Burchert W, Horstkotte D, Kasprzak JD, Smialowski A, Rudzinski T, Lipiec P, Krzeminska-Pakula M, Wierzbowska-Drabik K, Trzos E, Kurpesa M, Motoki H, Hana M, Marwick T, Allan K, Vazquez-Alvarez M, Medrano Lopez C, Granja Da Silva S, Marcos C, Rodriguez-Ogando A, Alvarez M, Camino M, Centeno M, Maroto E, Feltes Guzman G, Serra Tomas V, Acevedo O, Calli A, Barba M, Pintos G, Valverde V, Zamorano Gomez J, Marchel M, Kochanowski J, Piatkowski R, Madej A, Filipiak K, Hausmanowa-Petrusewicz I, Opolski G, Malev E, Zemtsovsky E, Reeva S, Timofeev E, Pshepiy A, Mihaila S, Rimbas R, Mincu R, Dulgheru R, Mihaila R, Badiu C, Cinteza M, Vinereanu D, Rodrigues A, Guimaraes L, Lira E, Lebihan D, Monaco C, Cordovil A, Oliveira W, Vieira M, Fischer C, Morhy S, Ruiz Ortiz M, Mesa D, Delgado M, Romo E, Pena M, Puentes M, Santisteban M, Lopez Granados A, Arizon Del Prado J, Suarez De Lezo J, Tsai WC, Shih JY, Huang TS, Liu YW, Huang YY, Tsai LM, Cho E, Choi K, Kwon B, Kim D, Jang S, Park C, Jung H, Jeon H, Youn H, Kim J, Rieck AE, Cramariuc D, Lonnebakken M, Lund B, Gerdts E, Moceri P, Doyen D, Cerboni P, Ferrari E, Li W, Silva D, Goncalves S, Ribeiro S, Santos L, Sargento L, Vinhais De Sousa G, Almeida AG, Nunes Diogo A, Hernandez Garcia C, De La Rosa Hernandez A, Arroyo Ucar E, Jorge Perez P, Barragan Acea A, Lacalzada Almeida J, Jimenez Rivera J, Duque Garcia A, Laynez Cerdena I, Arhipov O, Sumin AN, Campens L, Renard M, Trachet B, Segers P, De Paepe A, De Backer J, Purvis JA, Sharma D, Hughes SM, Marek D, Vindis D, Kocianova E, Taborsky M, Yoon H, Kim K, Ahn Y, Chung M, Cho J, Kang J, Rha W, Ozcan O, Sezgin Ozcan D, Candemir B, Aras M, Dincer I, Atak R, Gianturco L, Turiel M, Atzeni F, Tomasoni L, Bruschi E, Epis O, Sarzi-Puttini P, Aggeli C, Poulidakis E, Felekos I, Sideris S, Dilaveris P, Gatzoulis K, Stefanadis C, Wierzbowska-Drabik K, Roszczyk N, Sobczak M, Lipiec P, Peruga J, Krecki R, Kasprzak J, Ishii K, Suyama T, Kataoka K, Furukawa A, Nagai T, Maenaka M, Seino Y, Musca F, De Chiara B, Moreo A, Epis O, Bruschi E, Cataldo S, Parolini M, Parodi O, Bombardini T, Faita F, Picano E, Park SJ, Kil JH, Kim SJ, Jang SY, Chang SA, Choi JO, Lee SC, Park S, Park P, Oh J, Cikes M, Velagic V, Biocina B, Gasparovic H, Djuric Z, Bijnens B, Milicic D, Huqi A, Klas B, He A, Paterson I, Irween M, Ezekovitz J, Choy J, Becher H, Chen Y, Cheng L, Yao R, Yao H, Chen H, Pan C, Shu X, Sobkowicz B, Kaminska M, Musial W, Kaminska M, Sobkowicz B, Musial W, Buechel R, Sommer G, Leibundgut G, Rohner A, Bremerich J, Kaufmann B, Kessel-Schaefer A, Handke M, Kiotsekoglou A, Saha S, Toole R, Sharma S, Gopal A, Adhya S, Tsang W, Kenny C, Kapetanakis S, Lang R, Monaghan M, Smith B, Grapsa J, Dawson D, Coulter T, Rendon A, Cheung WS, Gorissen W, Nihoyannopoulos P, Ejlersen JA, May O, Van Slochteren FJ, Van Der Spoel T, Hanssen H, Doevendans P, Chamuleau S, De Korte C, Tarr A, Stoebe S, Trache T, Kluge JG, Varga A, Hagendorff A, Nagy A, Kovacs A, Apor A, Sax B, Becker D, Merkely B, Lindquist R, Miller A, Reece C, Eidem BW, Choi WG, Kim S, Oh S, Kim Y, Iacobelli R, Chinali M, D' Asaro M, Toscano A, Del Pasqua A, Esposito C, Seghetti G, Parisi F, Pongiglione G, Rinelli G, Omaygenc O, Bakal R, Dogan C, Teber K, Akpinar S, Sahin G, Ozdemir N, Penhall A, Joseph M, Chong F, De Pasquale C, Selvanayagam J, Leong D, Nyktari EG, Patrianakos AP, Goudis C, Solidakis G, Parthenakis F, Vardas P, Nestaas E, Stoylen A, Fugelseth D, Vitarelli A, Capotosto L, Bernardi M, Conde Y, Caranci F, Placanica G, Dettori O, Vitarelli M, De Chiara S, De Cicco V, Ancona R, Comenale Pinto S, Caso P, Severino S, Cavallaro M, Ferro' M, Calabro' R, Apostolakis S, Chalikias G, Tziakas D, Stakos D, Thomaidi A, Konstantinides S, Vitarelli A, Caranci F, Capotosto L, Iorio G, Rucos R, Continanza G, De Cicco V, D Ascanio M, Alessandroni L, Saponara M, Berry M, Nahum J, Zaghden O, Monin J, Couetil J, Lairez O, Macron L, Dubois Rande J, Gueret P, Lim P, Cameli M, Giacomin E, Lisi M, Benincasa S, Righini F, Menci D, Focardi M, Mondillo S, Bonello B, Fouilloux V, Philip E, Gorincour G, Fraisse A, Bellsham-Revell H, Bell AJ, Miller OI, Beerbaum P, Razavi R, Greil G, Simpson JM, Ann S, Youn H, Jung H, Kim T, Lee J, Chin J, Kim T, Cabeza Lainez P, Escolar Camas V, Gheorghe L, Fernandez Garcia P, Vazquez Garcia R, Gargani L, Caiulo V, Caiulo S, Fisicaro A, Moramarco F, Latini G, Sicari R, Picano E, Seale A, Carvalho J, Gardiner H, Roughton M, Simpson J, Tometzki A, Uzun O, Webber S, Daubeney P, Elnoamany MF, Dawood A, Dwivedi G, Mahadevan G, Jiminez D, Steeds R, Frenneaux M, Attenhofer Jost CH, Knechtle B, Bernheim A, Pfyffer M, Linka A, Faeh-Gunz A, Seifert B, De Pasquale G, Zuber M, Simova I, Hristova K, Georgieva S, Kostova V, Katova T, Tomaszewski A, Kutarski A, Tomaszewski M. Poster Session 2: Thursday 8 December 2011, 14:00-18:00 * Location: Poster Area. European Journal of Echocardiography 2011. [DOI: 10.1093/ejechocard/jer208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Wang J, Zhang W, He A, Yang Y, Gu L. 193 Clinical observation of HA-G regimen chemotherapy in remission induction for elderly patients with acute leukemia and myelodysplastic syndrome. Leuk Res 2011. [DOI: 10.1016/s0145-2126(11)70195-3] [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: 10/18/2022]
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Robertson G, Bilenky M, Lin K, He A, Yuen W, Dagpinar M, Varhol R, Teague K, Griffith OL, Zhang X, Pan Y, Hassel M, Sleumer MC, Pan W, Pleasance ED, Chuang M, Hao H, Li YY, Robertson N, Fjell C, Li B, Montgomery SB, Astakhova T, Zhou J, Sander J, Siddiqui AS, Jones SJM. cisRED: a database system for genome-scale computational discovery of regulatory elements. Nucleic Acids Res 2006; 34:D68-73. [PMID: 16381958 PMCID: PMC1347438 DOI: 10.1093/nar/gkj075] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.9] [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: 08/15/2005] [Revised: 10/08/2005] [Accepted: 10/08/2005] [Indexed: 11/30/2022] Open
Abstract
We describe cisRED, a database for conserved regulatory elements that are identified and ranked by a genome-scale computational system (www.cisred.org). The database and high-throughput predictive pipeline are designed to address diverse target genomes in the context of rapidly evolving data resources and tools. Motifs are predicted in promoter regions using multiple discovery methods applied to sequence sets that include corresponding sequence regions from vertebrates. We estimate motif significance by applying discovery and post-processing methods to randomized sequence sets that are adaptively derived from target sequence sets, retain motifs with p-values below a threshold and identify groups of similar motifs and co-occurring motif patterns. The database offers information on atomic motifs, motif groups and patterns. It is web-accessible, and can be queried directly, downloaded or installed locally.
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Affiliation(s)
- G Robertson
- Canada's Michael Smith Genome Sciences Centre, British Columbia Cancer Agency, Vancouver, BC, Canada.
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Li DN, He A, Wang Y, Liang Y, Li ZY, Men JX, Zhan XM. [Three lethal cases of Angiostrongylus cantonensis infected children]. Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi 2003; 19:310-1. [PMID: 12572053] [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: 02/28/2023]
Abstract
OBJECTIVE To offer approaches to diagnosis and treatment of Angiostrongylus cantonensis infection on the basis of analyzing three lethal cases of the disease. METHODS Clinical manifestations, pathological changes and species identification were pursued. RESULTS Angiostrongyliasis is usually neglected in medical departments. The three cases here reported were all misdiagnosed and had not receiced anthelmintic treatment hence fatality ensued. CONCLUSION Early examination of CSF, bronchial lavage fluid and feces is urged so as to secure accurate diagnosis and conduct efficacious anthelmintic therapy to cure the patients.
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Affiliation(s)
- D N Li
- Department of Parasitology, Sun Yat-Sen University of Medical Sciences, Guangzhou 510089
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Abstract
Aspergillus niger ATCC 9142 was used to catalyze the biotransformation of S(-)-naproxen (1) to three major metabolites that were isolated by solvent extraction, purified chromatographically, and characterized by mass spectrometry and NMR spectroscopy. Metabolites were identified as O-desmethylnaproxen (2), 7-hydroxynaproxen (3) and 7-hydroxy-O-desmethyinaproxen (4). The kinetics of naproxen biotransformation to 2 and 4 was established over an 84 h period to show that naproxen was completely metabolized at 36 h, the major metabolite was O-desmethylnaproxen at 24 h, and the 7-hydroxy-O-desmethylnaproxen that was formed after 24 h.
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Affiliation(s)
- A He
- Division of Medicinal and Natural Products Chemistry, College of Pharmacy, University of Iowa, Iowa City 52242-5000, USA
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He A, Li H. [Two cases of clavicular tumor]. Hunan Yi Ke Da Xue Xue Bao 2002; 24:91. [PMID: 11938756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
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He A, Fu Y. [Tubulation of peripheral nerve defects of upper limb using silastic tube]. Hunan Yi Ke Da Xue Xue Bao 2002; 24:494, 496. [PMID: 12080700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
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He A, Lagerlöf KPD, Castaing J, Heuer AH. Considerations of the double-cross-slip mechanism for basal and rhombohedral twinning in sapphire (α-Al2O3). ACTA ACUST UNITED AC 2002. [DOI: 10.1080/01418610208240070] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Abstract
The hippocampus consists of distinct anatomic regions that have been demonstrated to have different biological functions. To explore the molecular differences between hippocampal subregions, we performed transcriptional profiling analysis by using DNA microarray technology. The cRNA derived from the CA1, CA3, and dentate gyrus regions of the hippocampus and from spinal cord was hybridized to Affymetrix high-density oligo arrays. This systematic approach revealed sets of genes that were expressed specifically in subregions of the hippocampus corresponding to predefined cytoarchitectural boundaries, which could be confirmed by in situ hybridization and Real Time quantitative polymerase chain reaction. The relative enrichment and absence of genes in the hippocampal subregions support the conclusion that there is a molecular basis for the previously defined anatomic subregions of the hippocampus and also reveal genes that could be important in defining the unique functions of the hippocampal subfields.
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Affiliation(s)
- X Zhao
- Laboratory of Genetics, Vision Center Laboratory, the Salk Institute for Biological Studies, La Jolla, CA 92037, USA
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Huang YF, Zhang YM, He A, Cao XH. [Determination of puerarin in xinmaitong oral liquid by HPLC]. Zhongguo Zhong Yao Za Zhi 2001; 26:760-1. [PMID: 12776346] [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: 03/02/2023]
Abstract
OBJECTIVE To develop a method to determine the content of puerarin in Xinmaitong oral liquid. METHODS HPLC method was used. The separation was performed on Suntek kromasil C18 column with methanol-water containing 0.5% acetic acid (25:75) as a mobile phase and the wavelength of UV detector was 250 nm. RESULTS The linearity of puerarin was good and average recovery was 97.8%. CONCLUSION The method is simple, reliable and sensitive. It also shows good resolation. It can be used in quality control of Xinmaitong oral liquid.
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Affiliation(s)
- Y F Huang
- Third Affiliated Hospital, Sun Yat-sen University of Medical Sciences, Guangzhou 510630, Guangdong, China
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He A. [Is Wang Qingren a scholar belonging to the sect of Amalgamating traditional Chinese with Western medicine?] (Chi). Zhonghua Yi Shi Za Zhi 2001; 17:196-8. [PMID: 11612446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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He A. [Exploration on the date of birth and death of Chunyu Yi] (Chi). Zhonghua Yi Shi Za Zhi 2001; 14:80-4. [PMID: 11611532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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Jia X, He A, Zhang D, Wang E, Song J. [Comparison and analysis of clinicopathology of lung cancer between 1980s and 1990s in the Shenyang area (1,224 cases)]. Zhonghua Bing Li Xue Za Zhi 2001; 30:332-5. [PMID: 11769727] [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: 02/23/2023]
Abstract
OBJECTIVE To compare the changes in pathogenetis and histopathology of lung cancer between 1980s and 1990s in the Shenyang area. METHODS The HE stained sections of 572 cases of lung cancer from 1981-1990 and 652 cases from 1991-2000 were reviewed. Parts of these samples were also studied with immunohistochemistry and in situ hybridization. RESULTS AND CONCLUSIONS By comparing the finding in the 1980s and those of the 1990s, it was found that (1) the incidence of lung cancer in women increased. (2) the highest incidence occurred in the 61 to 70 year of old group in 1990s, in 1980s it was 51-60 years. (3) there was an increased incidence of adenocarcinoma, especially papillary adenocarcinoma and acinar adenocarcinoma and bronchioloalveolar carcinoma in the 1990s.
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Affiliation(s)
- X Jia
- Department of Pathology, China Medical University, Shenyang 110001, China
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Yin L, Li L, Pan Y, Tan Y, He A. [IL-1 beta mRNA and TNF-alpha mRNA expression in gingival tissues of patients with adult periodontitis]. Hua Xi Kou Qiang Yi Xue Za Zhi 2001; 19:318-21. [PMID: 12539491] [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: 02/28/2023]
Abstract
OBJECTIVE The aim of this study was to examine interleukin-1 beta (IL-1 beta) mRNA and tumor necrosis factor alpha (TNF-alpha) mRNA expression in gingival tissues of patients with adult periodontitis. METHODS A total of 19 patients, including 10 patients with adult periodontitis and 9 healthy individuals as the control, were evaluated for were selected for evaluating IL-1 beta mRNA and TNF-alpha mRNA expression, using reverse transcription polymerase chain reaction (RT-PCR) technique. RESULTS The relative amount of IL-1 beta mRNA expression of gingival samples from patients with adult periodontitis (0.819 +/- 0.045) (P < 0.01) was much higher than that from the normal control (0.306 +/- 0.087) (P < 0.01). The relative amount of TNF-alpha mRNA expression, gingival samples from AP patients (0.696 +/- 0.098) was also much higher than that from the normal control (0) (P < 0.01). CONCLUSION As the inflammatory and bone absorption mediators, IL-1 beta and TNF-alpha might play important roles in the pathogenesis and development of adult periodontitis.
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Affiliation(s)
- L Yin
- College of Stomatology, China Medical University
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