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Chen AY, Deng CY, Calvachi-Prieto P, Armengol de la Hoz MÁ, Khazi-Syed A, Chen C, Scurlock C, Becker CD, Johnson AEW, Celi LA, Dagan A. A Large-Scale Multicenter Retrospective Study on Nephrotoxicity Associated With Empiric Broad-Spectrum Antibiotics in Critically Ill Patients. Chest 2023; 164:355-368. [PMID: 37040818 PMCID: PMC10475819 DOI: 10.1016/j.chest.2023.03.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 03/13/2023] [Accepted: 03/30/2023] [Indexed: 04/13/2023] Open
Abstract
BACKGROUND Evidence regarding acute kidney injury associated with concomitant administration of vancomycin and piperacillin-tazobactam is conflicting, particularly in patients in the ICU. RESEARCH QUESTION Does a difference exist in the association between commonly prescribed empiric antibiotics on ICU admission (vancomycin and piperacillin-tazobactam, vancomycin and cefepime, and vancomycin and meropenem) and acute kidney injury? STUDY DESIGN AND METHODS This was a retrospective cohort study using data from the eICU Research Institute, which contains records for ICU stays between 2010 and 2015 across 335 hospitals. Patients were enrolled if they received vancomycin and piperacillin-tazobactam, vancomycin and cefepime, or vancomycin and meropenem exclusively. Patients initially admitted to the ED were included. Patients with hospital stay duration of < 1 h, receiving dialysis, or with missing data were excluded. Acute kidney injury was defined as Kidney Disease: Improving Global Outcomes stage 2 or 3 based on serum creatinine component. Propensity score matching was used to match patients in the control (vancomycin and meropenem or vancomycin and cefepime) and treatment (vancomycin and piperacillin-tazobactam) groups, and ORs were calculated. Sensitivity analyses were performed to study the effect of longer courses of combination therapy and patients with renal insufficiency on admission. RESULTS Thirty-five thousand six hundred fifty-four patients met inclusion criteria (vancomycin and piperacillin-tazobactam, n = 27,459; vancomycin and cefepime, n = 6,371; vancomycin and meropenem, n = 1,824). Vancomycin and piperacillin-tazobactam was associated with a higher risk of acute kidney injury and initiation of dialysis when compared with that of both vancomycin and cefepime (Acute kidney injury: OR, 1.37 [95% CI, 1.25-1.49]; dialysis: OR, 1.28 [95% CI, 1.14-1.45]) and vancomycin and meropenem (Acute kidney injury: OR, 1.27 [95%, 1.06-1.52]; dialysis: OR, 1.56 [95% CI, 1.23-2.00]). The odds of acute kidney injury developing was especially pronounced in patients without renal insufficiency receiving a longer duration of vancomycin and piperacillin-tazobactam therapy compared with vancomycin and meropenem therapy. INTERPRETATION VPT is associated with a higher risk of acute kidney injury than both vancomycin and cefepime and vancomycin and meropenem in patients in the ICU, especially for patients with normal initial kidney function requiring longer durations of therapy. Clinicians should consider vancomycin and meropenem or vancomycin and cefepime to reduce the risk of nephrotoxicity for patients in the ICU.
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Affiliation(s)
- Alyssa Y Chen
- The University of Texas Southwestern Medical School, Dallas, TX; Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA; Laboratory for Computational Physiology, Massachusetts Institute of Technology, Cambridge, MA
| | - Chih-Ying Deng
- Laboratory for Computational Physiology, Massachusetts Institute of Technology, Cambridge, MA; Department of Bioinformatics, Harvard Medical School, Massachusetts General Hospital, Boston, MA
| | - Paola Calvachi-Prieto
- Laboratory for Computational Physiology, Massachusetts Institute of Technology, Cambridge, MA; Department of Bioinformatics, Harvard Medical School, Massachusetts General Hospital, Boston, MA
| | - Miguel Ángel Armengol de la Hoz
- Laboratory for Computational Physiology, Massachusetts Institute of Technology, Cambridge, MA; Cardiovascular Research Center, Harvard Medical School, Massachusetts General Hospital, Boston, MA; Biomedical Engineering and Telemedicine Group, Biomedical Technology Centre CTB, ETSI Telecomunicación, Universidad Politécnica de Madrid, Madrid, Spain
| | | | - Christina Chen
- Laboratory for Computational Physiology, Massachusetts Institute of Technology, Cambridge, MA; Department of Medicine, Beth Israel Deaconess Medical Center, Boston, MA; Department of Medicine, University of California, San Francisco and San Francisco VA Health Care System, San Francisco, CA
| | - Corey Scurlock
- Department of Medicine and eHealth Center, New York Medical College/Westchester Medical Center, Valhalla, NY
| | - Christian D Becker
- Department of Medicine and eHealth Center, New York Medical College/Westchester Medical Center, Valhalla, NY
| | - Alistair E W Johnson
- Laboratory for Computational Physiology, Massachusetts Institute of Technology, Cambridge, MA
| | - Leo Anthony Celi
- Laboratory for Computational Physiology, Massachusetts Institute of Technology, Cambridge, MA; Department of Pulmonary, Critical Care and Sleep Medicine, Beth Israel Deaconess Medical Center, Boston, MA; Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA
| | - Alon Dagan
- Laboratory for Computational Physiology, Massachusetts Institute of Technology, Cambridge, MA; Department of Emergency Medicine, Beth Israel Deaconess Medical Center, Boston, MA.
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Lindvall C, Deng CY, Agaronnik ND, Kwok A, Samineni S, Umeton R, Mackie-Jenkins W, Kehl KL, Tulsky JA, Enzinger AC. Deep Learning for Cancer Symptoms Monitoring on the Basis of Electronic Health Record Unstructured Clinical Notes. JCO Clin Cancer Inform 2022; 6:e2100136. [PMID: 35714301 PMCID: PMC9232368 DOI: 10.1200/cci.21.00136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
PURPOSE Symptoms are vital outcomes for cancer clinical trials, observational research, and population-level surveillance. Patient-reported outcomes (PROs) are valuable for monitoring symptoms, yet there are many challenges to collecting PROs at scale. We sought to develop, test, and externally validate a deep learning model to extract symptoms from unstructured clinical notes in the electronic health record. METHODS We randomly selected 1,225 outpatient progress notes from among patients treated at the Dana-Farber Cancer Institute between January 2016 and December 2019 and used 1,125 notes as our training/validation data set and 100 notes as our test data set. We evaluated the performance of 10 deep learning models for detecting 80 symptoms included in the National Cancer Institute's Patient-Reported Outcomes version of the Common Terminology Criteria for Adverse Events (PRO-CTCAE) framework. Model performance as compared with manual chart abstraction was assessed using standard metrics, and the highest performer was externally validated on a sample of 100 physician notes from a different clinical context. RESULTS In our training and test data sets, 75 of the 80 candidate symptoms were identified. The ELECTRA-small model had the highest performance for symptom identification at the token level (ie, at the individual symptom level), with an F1 of 0.87 and a processing time of 3.95 seconds per note. For the 10 most common symptoms in the test data set, the F1 score ranged from 0.98 for anxious to 0.86 for fatigue. For external validation of the same symptoms, the note-level performance ranged from F1 = 0.97 for diarrhea and dizziness to F1 = 0.73 for swelling. CONCLUSION Training a deep learning model to identify a wide range of electronic health record-documented symptoms relevant to cancer care is feasible. This approach could be used at the health system scale to complement to electronic PROs.
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Affiliation(s)
- Charlotta Lindvall
- Dana-Farber Cancer Institute, Boston, MA.,Harvard Medical School, Boston, MA.,Brigham and Women's Hospital, Boston, MA
| | | | - Nicole D Agaronnik
- Dana-Farber Cancer Institute, Boston, MA.,Harvard Medical School, Boston, MA
| | - Anne Kwok
- Dana-Farber Cancer Institute, Boston, MA
| | | | | | | | - Kenneth L Kehl
- Dana-Farber Cancer Institute, Boston, MA.,Harvard Medical School, Boston, MA.,Brigham and Women's Hospital, Boston, MA
| | - James A Tulsky
- Dana-Farber Cancer Institute, Boston, MA.,Harvard Medical School, Boston, MA.,Brigham and Women's Hospital, Boston, MA
| | - Andrea C Enzinger
- Dana-Farber Cancer Institute, Boston, MA.,Harvard Medical School, Boston, MA.,Brigham and Women's Hospital, Boston, MA
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Lindvall C, Deng CY, Moseley E, Agaronnik N, El-Jawahri A, Paasche-Orlow MK, Lakin JR, Volandes A, Tulsky TAPIJA. Natural Language Processing to Identify Advance Care Planning Documentation in a Multisite Pragmatic Clinical Trial. J Pain Symptom Manage 2022; 63:e29-e36. [PMID: 34271146 PMCID: PMC9124370 DOI: 10.1016/j.jpainsymman.2021.06.025] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 06/26/2021] [Accepted: 06/28/2021] [Indexed: 01/03/2023]
Abstract
CONTEXT Large multisite clinical trials studying decision-making when facing serious illness require an efficient method for abstraction of advance care planning (ACP) documentation from clinical text documents. However, the current gold standard method of manual chart review is time-consuming and unreliable. OBJECTIVES To evaluate the ability to use natural language processing (NLP) to identify ACP documention in clinical notes from patients participating in a multisite trial. METHODS Patients with advanced cancer followed in three disease-focused oncology clinics at Duke Health, Mayo Clinic, and Northwell Health were identified using administrative data. All outpatient and inpatient notes from patients meeting inclusion criteria were extracted from electronic health records (EHRs) between March 2018 and March 2019. NLP text identification software with semi-automated chart review was applied to identify documentation of four ACP domains: (1) conversations about goals of care, (2) limitation of life-sustaining treatment, (3) involvement of palliative care, and (4) discussion of hospice. The performance of NLP was compared to gold standard manual chart review. RESULTS 435 unique patients with 79,797 notes were included in the study. In our validation data set, NLP achieved F1 scores ranging from 0.84 to 0.97 across domains compared to gold standard manual chart review. NLP identified ACP documentation in a fraction of the time required by manual chart review of EHRs (1-5 minutes per patient for NLP, vs. 30-120 minutes for manual abstraction). CONCLUSION NLP is more efficient and as accurate as manual chart review for identifying ACP documentation in studies with large patient cohorts.
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Affiliation(s)
- Charlotta Lindvall
- Department of Psychosocial Oncology and Palliative Care, Dana-Farber Cancer Institute (C.L., CY.D.,E.M., N.A., JR.L., JA.T.), Boston, Massachusetts; Department of Medicine, Brigham and Women's Hospital (C.L., JR.L., JA.T.), Boston, Massachusetts; Harvard Medical School, Boston (C.L., N.A., A.EJ., JR.L., A.V., JA.T.), Massachusetts.
| | - Chih-Ying Deng
- Department of Psychosocial Oncology and Palliative Care, Dana-Farber Cancer Institute (C.L., CY.D.,E.M., N.A., JR.L., JA.T.), Boston, Massachusetts
| | - Edward Moseley
- Department of Psychosocial Oncology and Palliative Care, Dana-Farber Cancer Institute (C.L., CY.D.,E.M., N.A., JR.L., JA.T.), Boston, Massachusetts
| | - Nicole Agaronnik
- Department of Psychosocial Oncology and Palliative Care, Dana-Farber Cancer Institute (C.L., CY.D.,E.M., N.A., JR.L., JA.T.), Boston, Massachusetts; Harvard Medical School, Boston (C.L., N.A., A.EJ., JR.L., A.V., JA.T.), Massachusetts
| | - Areej El-Jawahri
- Harvard Medical School, Boston (C.L., N.A., A.EJ., JR.L., A.V., JA.T.), Massachusetts; Department of Medicine, Massachusetts General Hospital (A.EJ., A.V.), Boston, Massachusetts
| | - Michael K Paasche-Orlow
- Department of Medicine, Boston University School of Medicine, Boston Medical Center (MK.PO.), Boston, Massachusetts; ACP Decisions (MK.PO., A.V.), Boston, Massachusetts
| | - Joshua R Lakin
- Department of Psychosocial Oncology and Palliative Care, Dana-Farber Cancer Institute (C.L., CY.D.,E.M., N.A., JR.L., JA.T.), Boston, Massachusetts; Department of Medicine, Brigham and Women's Hospital (C.L., JR.L., JA.T.), Boston, Massachusetts; Harvard Medical School, Boston (C.L., N.A., A.EJ., JR.L., A.V., JA.T.), Massachusetts
| | - Angelo Volandes
- Harvard Medical School, Boston (C.L., N.A., A.EJ., JR.L., A.V., JA.T.), Massachusetts; Department of Medicine, Massachusetts General Hospital (A.EJ., A.V.), Boston, Massachusetts; ACP Decisions (MK.PO., A.V.), Boston, Massachusetts
| | - The Acp-Peace Investigators James A Tulsky
- Department of Psychosocial Oncology and Palliative Care, Dana-Farber Cancer Institute (C.L., CY.D.,E.M., N.A., JR.L., JA.T.), Boston, Massachusetts; Department of Medicine, Brigham and Women's Hospital (C.L., JR.L., JA.T.), Boston, Massachusetts; Harvard Medical School, Boston (C.L., N.A., A.EJ., JR.L., A.V., JA.T.), Massachusetts
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Lai CP, Chen YY, Deng CY, Wu CK. The effect of pre-ESRD care program on potentially inappropriate medication in advanced CKD patients. Eur J Public Health 2021. [DOI: 10.1093/eurpub/ckab165.208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Due to the multiple comorbidities and the associated complications among advanced CKD population, assessing potentially inappropriate medications (PIM) in these patients is an important task for physicians and multidisciplinary care team members. This study aimed to investigate the impact of the national pre-ESRD pay-for-performance (P4P) program on prescribing quality in Taiwan.
Methods
We conducted a retrospective cohort study using data from National Health Insurance Research Database (NHIRD) maintained by the Health and Welfare Data Science Center, Ministry of Health and Welfare (HWDC, MOHW). The incidents of CKD in year 2010 were observed until the end of 2017. Adult patients who initiated maintenance dialysis therapy were enrolled. To identify the use of PIM that should be avoided in advanced CKD patients, the Beers 2019 criteria and latest Taiwan Manual of Renal Injury Prevention and Drug Safety were applied. We measured PIM use in one year before starting long-term dialysis.
Results
Among 7,828 participants underwent continuous dialysis treatment, 2,119 (27.1%) were P4P patients. Most (90.4%) participants were prescribed one or more PIMs before ESRD initiation. After adjusted age, sex, Charlson Comorbidity Index (CCI) and the number of nephrologist visits, the logistic regression showed lower probability of PIM use in the P4P enrollees (OR = 0.56, 95% CI = 0.47-0.66). The effect of P4P on PIM was more prominent in the subgroups of patients who were female and CCI≤3.
Conclusions
The implementation of the pre-ESRD P4P program might reduce PIM use among CKD patients. Our results underline the strategy of financial incentives in the payment design to improve prescribing patterns.
Key messages
Prescribing potentially inappropriate medications is common among patients who were approaching ESRD. The study highlights the importance of implementing the pre-ESRD P4P program to reduce PIM use in advanced CKD patients.
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Affiliation(s)
- CP Lai
- Institute of Hospital and Health Care Administration, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - YY Chen
- Institute of Hospital and Health Care Administration, National Yang Ming Chiao Tung University, Taipei, Taiwan
- Department of Research, Shin-Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan
| | - CY Deng
- Institute of Hospital and Health Care Administration, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - CK Wu
- Division of Nephrology, Shin-Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan
- Precision Medicine Center, Shin-Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan
- School of Medicine, Fu-Jen Catholic University, New Taipei, Taiwan
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Yang CS, Huang YL, Chen CB, Deng CY, Liu YT, Huang PHP, Chang KC. Aging Process of Lateral Facial Fat Compartments: A Retrospective Study. Aesthet Surg J 2021; 41:NP247-NP254. [PMID: 33649752 DOI: 10.1093/asj/sjaa340] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Since 2007, when the anatomy of facial fat compartment was described, an increasing number of studies on the aging process of the compartment of cadavers has emerged. OBJECTIVES The authors evaluated the aging changes of lateral facial fat compartments on the same person. METHODS Sixty-three patients were included in this retrospective study. All patients had magnetic resonance imaging scans with at least 4 years apart. The authors targeted the fat compartments of the superficial temporal, subcutaneous temporal, and buccal fat pad, comparing the data on different time points. RESULTS The thickness of the subcutaneous temporal fat did not change significantly. The 3 diameters of the superficial temporal fat compartment all became thinner on the axial view (P < 0.05). On the sagittal view, the superficial temporal fat elongated from 38.89 mm to 43.74 mm (P < 0.05). The buccal fat compartment also lengthened from 68.73 mm to 74.39 mm (P < 0.05) and had a positive correlation with follow-up duration only. CONCLUSIONS The study revealed the fat compartment change on the same person with time. The temporal hollow mainly originates from the thinner part of the superficial temporal fat. The descending of the buccal fat pad aggravates the labiomandibular fold. By understanding the aging process more fully, we can rejuvenate our patients more naturally.
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Affiliation(s)
- Ching-Sheng Yang
- Department of Dermatology, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Yau-Li Huang
- Department of Dermatology, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Chun-Bing Chen
- Department of Dermatology, Chang Gung Memorial Hospital, Keelung, Taiwan
| | - Chih-Ying Deng
- Department of Dermatology, Chang Gung Memorial Hospital, Linkou, Taiwan
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Zhou HS, Wang ZY, Gao XY, Deng CY, Xue YM, Yang H, Li X, Kuang SJ, Peng DW, Rao F, Wu SL. [Involvement of Src kinase in the down-regulation of ultra-rapid delayed rectifier K(+)current induced by tumor necrosis factor-α in cardiomyocytes]. Zhonghua Xin Xue Guan Bing Za Zhi 2020; 48:323-328. [PMID: 32370484 DOI: 10.3760/cma.j.cn112148-20190517-00267] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate whether inflammatory factor tumor necrosis factor-α (TNF-α) is involved in the electrical remodeling of cardiomyocytes by regulating ultra-rapid delayed rectifier K(+) current (I(kur)) and the role of Src kinase. Methods: H9c2 cells, embryonic cardiomyocytes of rat, were cultured in Dulbecco's modified Eagle's medium (DMEM) and atrium-derived HL-1 cells were cultured in Claycomb medium. Both H9c2 and HL-1 cells were cultured at 37 ℃ with 5% CO(2). Cells cultured in normal conditions without additional treatment served as control group. Experimental groups were treated with different concentration of TNF-α (25 or 50 or 100 ng/ml) for 24 hours. To study whether Src specific inhibitor PP1 could abrogate the effect of TNF-α, cells were pre-treated with 10 μmol/L PP1 for 1 hour, followed by TNF-α (100 ng/ml) for 24 hours. Western blot and the whole cell patch clamp technique were used to detect the protein expression of Kv1.5 and Src and I(kur) in each group. Results: (1) In H9c2 cells, high concentration of TNF-α treatment (100 ng/ml) significantly reduced the Kv1.5 protein expression compared with control group and TNF-α 25 ng/ml group (both P<0.05). Compared with control group, the expression of p-Src protein was higher in 25 ng/ml, 50 ng/ml, 100 ng/ml TNF-α group (all P<0.05), but there was no statistical difference in the expression of Src protein among groups (P>0.05). In addition, the current density of I(kur) was decreased in 50 ng/ml, 100 ng/ml TNF-α group (both P<0.05). Furthermore, the expression of Kv1.5 protein and the current density of I(kur) were increased in PP1+TNF-α group compared with TNF-α 100 ng/ml group (both P<0.05). There was no statistical difference in the expression of Kv1.5 protein and the current density of I(kur) between the control group and PP1+TNF-α group (both P>0.05). (2) In atrium-derived HL-1 cells, the expression of Kv1.5 protein was reduced in 100 ng/ml TNF-α group compared with control group and TNF-α 25 ng/ml group (both P<0.01). In addition, the expression of p-Src protein was increased in TNF-α 100 ng/ml group compared with control group (P<0.05), but there was no statistical difference in the protein expression of Src among groups (P>0.05). The expression of Kv1.5 protein was increased in PP1+TNF-α group compared with TNF-α 100 ng/ml group (P<0.05). Conclusion: TNF-α is involved in the pathogenesis of atrial fibrillation, probably via decreasing I(kur) current density in atrium-derived myocytes through the activation of Src kinase.
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Affiliation(s)
- H S Zhou
- School of Medicine, South China University of Technology, Guangdong 510006, China; Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong 510080, China
| | - Z Y Wang
- Research Department of Medical Sciences, Guangdong Provincial People's Hospital, Guangdong 510080, China
| | - X Y Gao
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong 510080, China
| | - C Y Deng
- Research Department of Medical Sciences, Guangdong Provincial People's Hospital, Guangdong 510080, China
| | - Y M Xue
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong 510080, China
| | - H Yang
- Research Department of Medical Sciences, Guangdong Provincial People's Hospital, Guangdong 510080, China
| | - X Li
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong 510080, China
| | - S J Kuang
- Research Department of Medical Sciences, Guangdong Provincial People's Hospital, Guangdong 510080, China
| | - D W Peng
- Research Department of Medical Sciences, Guangdong Provincial People's Hospital, Guangdong 510080, China
| | - F Rao
- Research Department of Medical Sciences, Guangdong Provincial People's Hospital, Guangdong 510080, China
| | - S L Wu
- School of Medicine, South China University of Technology, Guangdong 510006, China
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Johnson AEW, Pollard TJ, Berkowitz SJ, Greenbaum NR, Lungren MP, Deng CY, Mark RG, Horng S. MIMIC-CXR, a de-identified publicly available database of chest radiographs with free-text reports. Sci Data 2019; 6:317. [PMID: 31831740 PMCID: PMC6908718 DOI: 10.1038/s41597-019-0322-0] [Citation(s) in RCA: 258] [Impact Index Per Article: 51.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 11/11/2019] [Indexed: 12/18/2022] Open
Abstract
Chest radiography is an extremely powerful imaging modality, allowing for a detailed inspection of a patient's chest, but requires specialized training for proper interpretation. With the advent of high performance general purpose computer vision algorithms, the accurate automated analysis of chest radiographs is becoming increasingly of interest to researchers. Here we describe MIMIC-CXR, a large dataset of 227,835 imaging studies for 65,379 patients presenting to the Beth Israel Deaconess Medical Center Emergency Department between 2011-2016. Each imaging study can contain one or more images, usually a frontal view and a lateral view. A total of 377,110 images are available in the dataset. Studies are made available with a semi-structured free-text radiology report that describes the radiological findings of the images, written by a practicing radiologist contemporaneously during routine clinical care. All images and reports have been de-identified to protect patient privacy. The dataset is made freely available to facilitate and encourage a wide range of research in computer vision, natural language processing, and clinical data mining.
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Affiliation(s)
- Alistair E W Johnson
- Institute of Medical Engineering & Science, Massachusetts Institute of Technology, Cambridge, MA, USA.
| | - Tom J Pollard
- Institute of Medical Engineering & Science, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Seth J Berkowitz
- Department of Radiology, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Nathaniel R Greenbaum
- Department of Emergency Medicine, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | | | - Chih-Ying Deng
- Department of Biomedical Informatics, Harvard Medical School, Boston, MA, USA
| | - Roger G Mark
- Institute of Medical Engineering & Science, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Steven Horng
- Department of Emergency Medicine, Beth Israel Deaconess Medical Center, Boston, MA, USA
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Deng CY, Juan YH, Cheung YC, Lin YC, Lo YF, Lin G, Chen SC, Ng SH. Quantitative analysis of enhanced malignant and benign lesions on contrast-enhanced spectral mammography. Br J Radiol 2018; 91:20170605. [PMID: 29451413 DOI: 10.1259/bjr.20170605] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE To retrospectively analyze the quantitative measurement and kinetic enhancement among pathologically proven benign and malignant lesions using contrast-enhanced spectral mammography (CESM). METHODS We investigated the differences in enhancement between 44 benign and 108 malignant breast lesions in CESM, quantifying the extent of enhancements and the relative enhancements between early (between 2-3 min after contrast medium injection) and late (3-6 min) phases. RESULTS The enhancement was statistically stronger in malignancies compared to benign lesions, with good performance by the receiver operating characteristic curve [0.877, 95% confidence interval (0.813-0.941)]. Using optimal cut-off value at 220.94 according to Youden index, the sensitivity was 75.9%, specificity 88.6%, positive likelihood ratio 6.681, negative likelihood ratio 0.272 and accuracy 82.3%. The relative enhancement patterns of benign and malignant lesions, showing 29.92 vs 73.08% in the elevated pattern, 7.14 vs 92.86% in the steady pattern, 5.71 vs 94.29% in the depressed pattern, and 80.00 vs 20.00% in non-enhanced lesions (p < 0.0001), respectively. CONCLUSION Despite variations in the degree of tumour angiogenesis, quantitative analysis of the breast lesions on CESM documented the malignancies had distinctive stronger enhancement and depressed relative enhancement patterns than benign lesions. Advances in knowledge: To our knowledge, this is the first study evaluating the feasibility of quantifying lesion enhancement on CESM. The quantities of enhancement were informative for assessing breast lesions in which the malignancies had stronger enhancement and more relative depressed enhancement than the benign lesions.
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Affiliation(s)
- Chih-Ying Deng
- 1 Department of Medical Imaging and Intervention, Chang Gung Memorial Hospital , Linkuo and Taoyuan , Taiwan
| | - Yu-Hsiang Juan
- 1 Department of Medical Imaging and Intervention, Chang Gung Memorial Hospital , Linkuo and Taoyuan , Taiwan.,2 Department of Medical Imaging and Radiological Sciences, Medical College of Chang Gung University , Taoyuan , Taiwan
| | - Yun-Chung Cheung
- 1 Department of Medical Imaging and Intervention, Chang Gung Memorial Hospital , Linkuo and Taoyuan , Taiwan.,2 Department of Medical Imaging and Radiological Sciences, Medical College of Chang Gung University , Taoyuan , Taiwan
| | - Yu-Ching Lin
- 1 Department of Medical Imaging and Intervention, Chang Gung Memorial Hospital , Linkuo and Taoyuan , Taiwan.,2 Department of Medical Imaging and Radiological Sciences, Medical College of Chang Gung University , Taoyuan , Taiwan
| | - Yung-Feng Lo
- 3 Department of Surgery, Chang Gung Memorial Hospital at Linkou , Taoyuan , Taiwan
| | - GiGin Lin
- 1 Department of Medical Imaging and Intervention, Chang Gung Memorial Hospital , Linkuo and Taoyuan , Taiwan.,2 Department of Medical Imaging and Radiological Sciences, Medical College of Chang Gung University , Taoyuan , Taiwan
| | - Shin-Cheh Chen
- 2 Department of Medical Imaging and Radiological Sciences, Medical College of Chang Gung University , Taoyuan , Taiwan.,3 Department of Surgery, Chang Gung Memorial Hospital at Linkou , Taoyuan , Taiwan
| | - Shu-Hang Ng
- 1 Department of Medical Imaging and Intervention, Chang Gung Memorial Hospital , Linkuo and Taoyuan , Taiwan.,2 Department of Medical Imaging and Radiological Sciences, Medical College of Chang Gung University , Taoyuan , Taiwan
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Li YJ, Dai Q, Deng CY, Sun RX, Zheng J, Chen Z, Sun Y, Wang H, Yuan ZD, Fang C, Deng ZG. Field homogeneity improvement of maglev NdFeB magnetic rails from joints. Springerplus 2016; 5:372. [PMID: 27066380 PMCID: PMC4807185 DOI: 10.1186/s40064-016-1965-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Accepted: 03/02/2016] [Indexed: 11/10/2022]
Abstract
An ideal magnetic rail should provide a homogeneous magnetic field along the longitudinal direction to guarantee the reliable friction-free operation of high temperature superconducting (HTS) maglev vehicles. But in reality, magnetic field inhomogeneity may occur due to lots of reasons; the joint gap is the most direct one. Joint gaps inevitably exist between adjacent segments and influence the longitudinal magnetic field homogeneity above the rail since any magnetic rails are consisting of many permanent magnet segments. To improve the running performance of maglev systems, two new rail joints are proposed based on the normal rail joint, which are named as mitered rail joint and overlapped rail joint. It is found that the overlapped rail joint has a better effect to provide a competitive homogeneous magnetic field. And the further structure optimization has been done to ensure maglev vehicle operation as stable as possible when passing through those joint gaps. The results show that the overlapped rail joint with optimal parameters can significantly reduce the magnetic field inhomogeneity comparing with the other two rail joints. In addition, an appropriate gap was suggested when balancing the thermal expansion of magnets and homogenous magnetic field, which is considered valuable references for the future design of the magnetic rails.
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Affiliation(s)
- Y J Li
- Applied Superconductivity Laboratory, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, 610031 People's Republic of China ; School of Information Science and Technology, Southwest Jiaotong University, Chengdu, 610031 People's Republic of China
| | - Q Dai
- School of Information Science and Technology, Southwest Jiaotong University, Chengdu, 610031 People's Republic of China
| | - C Y Deng
- School of Information Science and Technology, Southwest Jiaotong University, Chengdu, 610031 People's Republic of China
| | - R X Sun
- Applied Superconductivity Laboratory, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, 610031 People's Republic of China
| | - J Zheng
- Applied Superconductivity Laboratory, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, 610031 People's Republic of China
| | - Z Chen
- School of Mechanical Engineering, Southwest Jiaotong University, Chengdu, 610031 People's Republic of China
| | - Y Sun
- School of Mechanical Engineering, Southwest Jiaotong University, Chengdu, 610031 People's Republic of China
| | - H Wang
- School of Mechanical Engineering, Southwest Jiaotong University, Chengdu, 610031 People's Republic of China
| | - Z D Yuan
- School of Mechanical Engineering, Southwest Jiaotong University, Chengdu, 610031 People's Republic of China
| | - C Fang
- School of Electrical Engineering, Southwest Jiaotong University, Chengdu, 610031 People's Republic of China
| | - Z G Deng
- Applied Superconductivity Laboratory, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, 610031 People's Republic of China
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10
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Liu LQ, Li FE, Deng CY. Short Communication: Molecular cloning and expression pattern of the porcine 5-aminolevulinate synthase 1 (ALAS1) gene and its association with reproductive traits. Genet Mol Res 2016; 15:gmr7544. [PMID: 26910002 DOI: 10.4238/gmr.15017544] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
5-Aminolevulinate synthase 1 (ALAS1) is the first enzyme in the heme biosynthetic pathway and is upregulated in follicular tissue during the early stages of ovulation. In this study, we isolated the complete coding sequence of the porcine ALAS1 gene and its 2-9 intron sequence, identified a single nucleotide polymorphism (SNP; T/C) in intron 9, and developed a PCR-MspI-restriction fragment length polymorphism genotyping assay. Association of the SNP with litter size was assessed in two populations [purebred Large White and the experimental synthetic (DIV) line]. Statistical analysis demonstrated that for total number of piglets born (TNB) in all parities, pigs with the CC genotype had an additional 0.68 and 0.74 piglets compared to the TC and TT animals (P < 0.05) in the DIV line, respectively. Purebred Large White sows inheriting the CC and TC genotypes gave birth to an additional 0.96 and 0.70 piglets compared to the TT animals (P < 0.05) in all parities, respectively. In addition, for TNB in all parities, a significant additive effect of 0.48 ± 0.23 and 0.37 ± 0.17 piglets/ litter was detected in sows of both populations (P < 0.05), respectively. The highest levels of ALAS1 gene expression were observed in isolated ovarian granulosa cells 2 and 12 h after stimulation with pregnant mare serum gonadotropin human chorionic gonadotropin, which represents the time of follicular development and ovulation, respectively. Therefore, the ALAS1 gene was significantly associated with litter size in two populations and could be a useful molecular marker for the selection of increasing litter size in pigs.
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Affiliation(s)
- L Q Liu
- Institute of Animal Sciences and Veterinary Medicine, Anhui Academy of Agricultural Sciences, Hefei, Anhui, China
| | - F E Li
- Key Laboratory of Pig Genetics and Breeding of Ministry of Agriculture and Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, Hubei, China
| | - C Y Deng
- Key Laboratory of Pig Genetics and Breeding of Ministry of Agriculture and Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, Hubei, China
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11
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Qi XS, Ding Q, Zhong W, Deng CY, Du YW. Large-Scale and Selective Synthesis of Carbon Nanofiber Bundles, Curved Carbon Nanofibers and Helical Carbon Nanofibers. J Nanosci Nanotechnol 2015; 15:2384-2388. [PMID: 26413672 DOI: 10.1166/jnn.2015.9520] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Through the pyrolysis of acetylene at 250 °C, large quantities of carbon nanofiber bundles (CNFBs), curved carbon nanofibers (CCNFs) and helical carbon nanofibers (HCNFs) can be synthesized selectively by controlling the Fe:Cu molar ratio of Fe-Cu nanoparticles. In this study, the systematic experimental results indicated that the Cu content in the Fe-Cu nanoparticles and pyrolysis temperature had great impact on the yield and structure of the final samples. Moreover, the transmission electron microscopic observation indicated that the catalyst nanoparticles were enwrapped tightly by graphite layers, and the obtained HCNFs show good magnetic property. Compared to the methods reported in the literature, the approach described herein has the advantages of being simple, low-cost, and environment-friendly. It is suitable for the controllable and mass production of CNFBs, CCNFs and HCNFs.
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12
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Rao F, Deng CY, Zhang QH, Xue YM, Xiao DZ, Kuang SJ, Lin QX, Shan ZX, Liu XY, Zhu JN, Yu XY, Wu SL. Involvement of Src tyrosine kinase and protein kinase C in the expression of macrophage migration inhibitory factor induced by H2O2 in HL-1 mouse cardiac muscle cells. Braz J Med Biol Res 2013; 46:746-51. [PMID: 24036910 PMCID: PMC3854426 DOI: 10.1590/1414-431x20132936] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2013] [Accepted: 06/06/2013] [Indexed: 11/22/2022] Open
Abstract
Macrophage migration inhibitory factor (MIF), a pleiotropic cytokine, plays an
important role in the pathogenesis of atrial fibrillation; however, the upstream
regulation of MIF in atrial myocytes remains unclear. In the present study, we
investigated whether and how MIF is regulated in response to the
renin-angiotensin system and oxidative stress in atrium myocytes (HL-1 cells).
MIF protein and mRNA levels in HL-1 cells were assayed using immunofluorescence,
real-time PCR, and Western blot. The result indicated that MIF was expressed in
the cytoplasm of HL-1 cells. Hydrogen peroxide (H2O2), but
not angiotensin II, stimulated MIF expression in HL-1 cells.
H2O2-induced MIF protein and gene levels increased in
a dose-dependent manner and were completely abolished in the presence of
catalase. H2O2-induced MIF production was completely
inhibited by tyrosine kinase inhibitors genistein and PP1, as well as by protein
kinase C (PKC) inhibitor GF109203X, suggesting that redox-sensitive MIF
production is mediated through tyrosine kinase and PKC-dependent mechanisms in
HL-1 cells. These results suggest that MIF is upregulated by HL-1 cells in
response to redox stress, probably by the activation of Src and PKC.
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Affiliation(s)
- F Rao
- Guangdong Academy of Medical Sciences, Guangdong Cardiovascular Institute, Guangdong General Hospital, Department of Cardiology, Guangzhou, China
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13
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Jiang CD, Li S, Deng CY. Assessment of genomic imprinting of PPP1R9A, NAP1L5 and PEG3 in pigs. Genetika 2011; 47:537-542. [PMID: 21675243] [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: 05/30/2023]
Abstract
Imprinted genes play significant roles in the regulation of fetal growth and development, function of the placenta, and maternal nurturing behaviour in mammals. At present, few imprinted genes have been reported in pigs compared to human and mouse. In order to increase understanding of imprinted genes in swine, a polymorphism-based approach was used to assess the imprinting status of three porcine genes in 12 tissue types, obtained from F1 pigs of reciprocal crosses between Rongchang and Landrace pure breeds. In contrast to human and mouse homologues, porcine PPP1R9A was not imprinted, and was found to be expressed in all tissues examined. The expression of porcine NAP1L5 was detected in pituitary, liver, spleen, lung, kidney, stomach, small intestine, skeletal muscle, fat, ovary, and uterus, but undetectable in heart. Furthermore, porcine NAP1L5 was paternally expressed in the tissues where it's expression was observed. For PEG3, pigs expressed the paternal allele in skeletal muscle, liver, spleen, kidney, and uterus, but biallele in heart, lung, fat, stomach, small intestine, and ovary. Our data indicate that tissue distribution of the three gene differs among mammals, and the imprinting of NAP1L5 and PEG3 is well conserved.
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Affiliation(s)
- C D Jiang
- School of Life Science, Southwest University, Chongqing 400715, China.
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14
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Li FR, Wang XG, Deng CY, Qi H, Ren LL, Zhou HX. Immune modulation of co-transplantation mesenchymal stem cells with islet on T and dendritic cells. Clin Exp Immunol 2010; 161:357-63. [PMID: 20456412 PMCID: PMC2909419 DOI: 10.1111/j.1365-2249.2010.04178.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/23/2010] [Indexed: 12/13/2022] Open
Abstract
Allogeneic pancreatic islet transplantation theoretically represents a cure for type 1 diabetes. However, current immune suppressive therapies are often associated with undesired side effects. Given this problem, and the shortage of human islet donors, the majority of type 1 diabetes patients cannot currently be offered an islet transplant. However, it has been found that mesenchymal stem cells (MSCs) could exert unique immunosuppressive effects both in vitro and in vivo. Herein we transplanted allogeneic 200 islets alone or in combination with MSCs (3 x 10(6) cells) under the kidney capsules of diabetic C57LB/6 mouse. We found that the ratios of T helper type 1 (Th1) to Th2 and Tc1 to Tc2 were reduced, and the numbers of naive and memory T cells were down-regulated in peripheral blood after transplantation. In addition, the maturation, endocytosis and interleukin-12 secretion of dendritic cell (DCs)-derived bone marrow cells (BMCs) from receptor mice were suppressed. Rejection reaction was alleviated by MSCs which exerted suppressive effects through T lymphocyte subsets and DCs.
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MESH Headings
- Animals
- Antibodies, Monoclonal/immunology
- Antibodies, Monoclonal/therapeutic use
- Antigens, CD/metabolism
- B7-2 Antigen/metabolism
- Blood Glucose/metabolism
- Bone Marrow Cells/cytology
- CD11c Antigen/metabolism
- Cell Differentiation/immunology
- Dendritic Cells/cytology
- Dendritic Cells/immunology
- Dendritic Cells/metabolism
- Dextrans/immunology
- Diabetes Mellitus, Experimental/blood
- Diabetes Mellitus, Experimental/pathology
- Diabetes Mellitus, Experimental/therapy
- Immunoglobulins/metabolism
- Immunomodulation/immunology
- Interleukin-12/metabolism
- Islets of Langerhans Transplantation/methods
- Kidney/pathology
- Leukocyte Common Antigens/immunology
- Lymphocyte Count
- Male
- Membrane Glycoproteins/metabolism
- Mesenchymal Stem Cell Transplantation/methods
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Phagocytosis/immunology
- T-Lymphocytes/cytology
- T-Lymphocytes/immunology
- T-Lymphocytes, Cytotoxic/cytology
- T-Lymphocytes, Cytotoxic/immunology
- Th1 Cells/cytology
- Th1 Cells/immunology
- Th2 Cells/cytology
- Th2 Cells/immunology
- CD83 Antigen
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Affiliation(s)
- F R Li
- Clinical Medical Research Center, the Second Clinical Medical College (Shenzhen People's Hospital) Ji'nan University, Shenzhen, China.
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15
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Yang H, Xu ZY, Lei MG, Li FE, Deng CY, Xiong YZ, Zuo B. Real-time reverse transcription-PCR expression profiling of porcine troponin I family in three different types of muscles during development. Mol Biol Rep 2010; 38:827-32. [PMID: 20376701 DOI: 10.1007/s11033-010-0172-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2009] [Accepted: 03/31/2010] [Indexed: 11/27/2022]
Abstract
In this study, the expression profiling of three troponin I isoforms (TNNI1, TNNI2 and TNNI3) was investigated in two pig breeds differing in muscularity (Yorkshire and Meishan) at six stages (fetal 60 days and postnatal 3, 35, 60, 120, and 180 days) and three types of muscles (longissimus dorsi muscle, LD; semitendinosus, ST; cardiac muscle, CM) using relative real-time quantitative PCR. Significant differences of troponin I expression in three muscles were found between Yorkshire and Meishan breeds at some stages. The expression peak of TNNI1 and TNNI2 in LD and ST was at postnatal 35 or 60 days in Yorkshire and at postnatal 120 or 180 days in Meishan pigs, while it occurred in CM at postnatal 3 days in two pig breeds. The relative expression values of TNNI1 and TNNI2 were significantly higher in LD than ST at most of stages after birth. The expression ratio of TNNI2 versus TNNI1 favoured TNNI2 expression in ST and LD, but on the contrary in CM. The expression peak of TNNI3 occurred at postnatal 60 and 120 days in Yorkshire and Meishan pigs, respectively. TNNI1 and TNNI3 were co-expressed in CM during the fetal and earlier stages after birth.
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Affiliation(s)
- H Yang
- Key Laboratory of Swine Genetics and Breeding, Ministry of Agriculture, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
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16
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Shan ZX, Lin QX, Deng CY, Zhou ZL, Tan HH, Fu YH, Li XH, Zhu JN, Mai LP, Kuang SJ, Lin SG, Yu XY. Comparison of approaches for efficient gene silencing induced by microRNA-based short hairpin RNA and indicator gene expression. Mol Biol Rep 2010; 37:1831-9. [PMID: 19603286 DOI: 10.1007/s11033-009-9618-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2008] [Accepted: 07/02/2009] [Indexed: 10/20/2022]
Abstract
MicroRNA-based short hairpin RNAs (shRNAs) are natural inducers of RNA interference and have been increasingly used in shRNA expression strategies. In the present study, we compared the efficiencies of exogenous green fluorescence protein (GFP) and endogenous glyceraldehyde-3-phosphate dehydrogenase (GAPDH) knockdown and red fluorescent protein (RFP) indicator expression mediated by three differently designed plasmids. RFP was introduced either at the 5' end, at the 3' end of the human mir155-based target gene (TG) (e.g., GFP or GAPDH) shRNA expression cassette (EC), or at the 3' end of the chimeric intron-containing TG shRNA EC. Comparisons with the control vector showed an obvious reduction of GFP or GAPDH expression with the various shRNA expression plasmids (P < 0.05). When RFP was located at the 5' end or at the 3' end of the TG shRNA EC, RFP expression was low; whereas when RFP was connected with the chimeric intron-containing TG shRNA EC, RFP expression was high. Taken together, this study demonstrated an efficient plasmid design for both TG silencing induced by microRNA-based shRNA and indicator gene expression in vitro.
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Affiliation(s)
- Z X Shan
- Research Center of Medical Sciences, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China
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17
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Xiong Q, Chai J, Zhang PP, Wu J, Jiang SW, Zheng R, Deng CY. MyoD control of SKIP expression during pig skeletal muscle development. Mol Biol Rep 2010; 38:267-74. [PMID: 20336382 DOI: 10.1007/s11033-010-0104-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2009] [Accepted: 03/16/2010] [Indexed: 11/25/2022]
Abstract
Skeletal muscle and kidney enriched inositol phosphatase (SKIP) was identified as a 5'-inositol phosphatase that hydrolyzes PI(3,4,5)P3 to PI(3,4)P2 that negatively regulates insulin-induced phosphatidylinositol 3-kinase signaling in skeletal muscle. In this study, we obtained a 1575-bp mRNA sequence of porcine SKIP that included the full coding region encoding a protein of 450 amino acids. With the use of comparative mapping, we mapped this gene to SSC12 q1.3, where many QTLs affect Backfat thickness at 10th rib, carcass yield, the number of muscle fibers, and ham weight traits. As a candidate gene for growth and carcass traits, a novel single nucleotide polymorphism in exon 12 (G>A) was detected by PCR-RFLP. The results showed that the GG genotype had higher skin percentage (SP), carcass length to first spondyle (CL1), carcass length to first rib (CL2), but lower intramuscular fat (IMF) as compared with genotype AG (P<0.05), and allele G seemed to be associated with an increase in the growth trait. Porcine SKIP was expressed abundantly in skeletal muscle tissue and was transcriptionally upregulated during skeletal muscle differentiation. Analysis of the porcine SKIP promoter sequence demonstrated that MyoD was involved in regulating SKIP mRNA expression in myotubes, partly via the cis-acting elements in SKIP promoter. In summary, we suggested that SKIP might play a role in the regulation of skeletal muscle development in pigs.
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Affiliation(s)
- Q Xiong
- Agricultural Ministry Key Laboratory of Swine Breeding and Genetics & Key Laboratory of Agricultural Animal Genetics, Breeding, and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
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18
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Xu ZY, Yang H, Xiong YZ, Deng CY, Li FE, Lei MG, Zuo B. Identification of three novel SNPs and association with carcass traits in porcine TNNI1 and TNNI2. Mol Biol Rep 2010; 37:3609-13. [PMID: 20182806 DOI: 10.1007/s11033-010-0010-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2009] [Accepted: 02/16/2010] [Indexed: 10/19/2022]
Abstract
In this study, two novel SNPs (EU743939:g.5174T>C in intron 4 and EU743939:g.8350C>A in intron 7) in TNNI1 and one SNP (EU696779:g.1167C>T in intron 3) in TNNI2 were identified by PCR-RFLP (PCR restriction fragment length polymorphism) using XbaI, MspI and SmaI restriction enzyme, respectively. The allele frequencies of three novel SNPs were determined in the genetically diverse pig breeds including ten Chinese indigenous pigs and three Western commercial pig breeds. Association analysis of the SNPs with the carcass traits were conducted in a Large White × Meishan F(2) pig population. The linkage of two SNPs (g.5174T>C and g.8350C>A) in TNNI1 gene had significant effect on fat percentage. Besides these, the g.5174T>C polymorphism was also significantly associated with skin percentage (P < 0.05), shoulder fat thickness (P < 0.05) and backfat thickness between sixth and seventh ribs (P < 0.05). The significant effects of g.1167C>T polymorphism in TNNI2 gene on fat percentage (P < 0.01), lean meat percentage (P < 0.05), lion eye area (P < 0.05), thorax-waist backfat thickness (P < 0.01) and average backfat thickness (P < 0.05) were also found.
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Affiliation(s)
- Z Y Xu
- Key Laboratory of Swine Genetics and Breeding, Ministry of Agriculture, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, 430070, Wuhan, People's Republic of China
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19
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Liu LQ, Li FE, Deng CY, Zuo B, Zheng R, Xiong YZ. Polymorphism of the pig 17beta-hydroxysteroid dehydrogenase type1 (HSD17B1) gene and its association with reproductive traits. Anim Reprod Sci 2008; 114:318-23. [PMID: 18945563 DOI: 10.1016/j.anireprosci.2008.09.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2008] [Revised: 08/31/2008] [Accepted: 09/05/2008] [Indexed: 11/16/2022]
Abstract
17beta-Hydroxysteroid dehydrogenase type 1 (HSD17B1) is a key enzyme of 17beta-estradiol biosynthesis, which might play an important role in follicular development of the ovary. In this study, we isolated the complete coding sequence of porcine HSD17B1 gene and its unique intron sequences of porcine HSD17B1 gene, identified a single nucleotide polymorphism (SNP: A/C) in intron 4, and developed a PCR-MvaI-RFLP genotyping assay. Association of the SNP and litter size was assessed in two populations (purebred Large White and a experimental synthetic Line (DIV) sows). Statistical analysis demonstrated that, in the first parity, AC animals in experimental synthetic Line (DIV) sows had 0.52 more piglets born compared to the CC animals (P<0.05). In the all parities, pigs with the AA genotype had an additional 1.11 and 0.96 piglets born alive compared to the CC animals (P<0.05) in both experimental synthetic Line (DIV) and purebred Large White, respectively. Experimental synthetic Line (DIV) sows inheriting the AC genotype had additional 0.84 piglets born alive compared to the CC animals (P<0.01) in all parities. In addition, significant additive effect of -0.55+/-0.24 piglets/litter and -0.48+/-0.22 piglets/litter on piglet born alive was detected in both experimental synthetic Line (DIV) sows and purebred Large White lines (P<0.05), respectively. Therefore, HSD17B1 gene was significantly associated with litter size in two populations and could be a useful molecular marker in selection for increasing litter size in pigs.
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Affiliation(s)
- L Q Liu
- Key Laboratory of Pig Genetics and Breeding of Ministry of Agriculture & Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, PR China.
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20
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Zhang YH, Mei SQ, Peng XW, Niu BY, Ren ZQ, Zuo B, Xu DQ, Lei MG, Zheng R, Jiang SW, Deng CY, Xiong YZ, Li FE. Molecular characterization and SNPs analysis of the porcine Deleted in AZoospermia Like (pDAZL) gene. Anim Reprod Sci 2008; 112:415-22. [PMID: 18620821 DOI: 10.1016/j.anireprosci.2008.05.069] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2008] [Revised: 05/05/2008] [Accepted: 05/21/2008] [Indexed: 10/22/2022]
Abstract
The Deleted in AZoospermia Like (DAZL) gene is expressed in prenatal and postnatal germ cells. In this study, we cloned and characterized the porcine Deleted in AZoospermia Like (pDAZL) gene. We found the full-length coding sequence of the pDAZL encoded a protein of 295 amino acids with a RNA recognition motif (amino acids 41-111) and a DAZ repeat (amino acids 167-120). The deduced protein sequence of pDAZL is 92.5% and 91.5% similar to those of human and bovine, respectively. PCR-MspI-RFLP and PCR-TaqI-RFLP were established to detect an A/G mutation in intron 7 and a C/A mutation in intron 9, respectively. Associations of two SNPs with litter size traits were assessed in Large White (n=275) and DIV (n=128) pig populations, and the statistical analysis demonstrated that CC produced 0.716 more (P<0.05) piglets born alive than CD genotypes in Large White pigs at TaqI locus (C/A mutation in intron 9), and the dominance effect was 0.304 pig per litter (P<0.05). This result suggests that the pDAZL gene might be a good candidate gene of litter size trait and provides some marker information for marker-assisted selection (MAS).
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Affiliation(s)
- Y H Zhang
- Key Laboratory of Pig Genetics and Breeding of Ministry of Agriculture, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan 430070, PR China
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21
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Cheng HC, Zhang FW, Jiang CD, Li FE, Xiong YZ, Deng CY. Isolation and imprinting analysis of the porcine DLX5 gene and its association with carcass traits. Anim Genet 2008; 39:395-9. [PMID: 18498429 DOI: 10.1111/j.1365-2052.2008.01740.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Imprinted genes play important roles in mammalian growth and development. However, reports on imprinted genes are limited in livestock. In this study, the complete ORF containing 289 amino acids of the porcine DLX5 gene was obtained. A C-to-T SNP mutation in exon 1 of the DLX5 gene was used to detect imprinting status with an RT-PCR/RFLP test (using HhaI) in eight heterozygous pigs from a population of Large White x Meishan F(1) hybrids. Imprinting analysis showed that the porcine DLX5 gene was maternally expressed in skeletal muscle, fat, lung, spleen, stomach and small intestine, but not imprinted in heart, liver, kidney, uterus, ovary, testicle or pituitary. A PCR-RFLP test was also used to detect the polymorphism in 310 pigs of a Large White x Meishan F(2) resource population. The statistical results showed significant association (P < 0.01) of the genotypes and fat meat percentage, carcass length, bone percentage, 6-7 rib fat thickness, average backfat thickness, thorax-waist fat thickness and buttock fat thickness.
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Affiliation(s)
- H C Cheng
- Key Laboratory of Swine Genetics and Breeding of Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China
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22
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Abstract
Esmolol is a unique cardioselective, intravenous, ultra-short acting, beta1-adrenergic blocking agent. It has been widely applied in treating ventricular and supraventricular arrhythmias, especially in emergency situations. In this study the effects of esmolol on sodium current (I(Na)) were investigated by the whole cell patch-clamp recording technique in isolated adult rat ventricular myocytes. The results indicated that esmolol reversibly inhibited I(Na) in a concentration-dependent manner, with an IC50 of 74.2 +/- 0.60 micromol l(-1) with a Hill coefficient of 1.02 +/- 0.04. This inhibition was voltage- and frequency-dependent. Esmolol decreased the peak of the I-V relationship curve at -35 mV from 16.97 +/- 1.68 pA/pF to 6.96 +/- 0.51 pA/pF. The steady-state inactivation curve of I(Na) was shifted to more negative potentials, the voltage at half-inactivation changing from -78.75 +/- 2.3 mV in control to -85.94 +/- 3.2 mV in the presence of esmolol. The development of resting inactivation from closed states was accelerated by esmolol, the time constant was shortened from 62.75 +/- 3.21 ms to 24.93 +/- 2.43 ms, whereas the activation curve was not altered. I(Na) from inactivation could not be recovered completely in the presence of esmolol. These results suggest that esmolol inhibits I(Na) through sodium channel in rat ventricular myocytes by mechanisms involving preferential interaction with the inactivated state and acceleration of the development of inactivation directly from resting state. Therefore, the effect of inhibitory sodium of esmolol may play a vital role in its antiarrhythmic efficacy.
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Affiliation(s)
- C Y Deng
- Research Center of Medical Sciences, Guangdong Provincial People's Hospital, Guangzhou, People's Republic of China.
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Zhang FW, Cheng HC, Jiang CD, Deng CY, Xiong YZ, Li FE, Lei MG. Imprinted status of pleomorphic adenoma gene-like I and paternal expression gene 10 genes in pigs1. J Anim Sci 2007; 85:886-90. [PMID: 17178803 DOI: 10.2527/jas.2006-278] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Genomic imprinting is theorized to exist in all placental mammals and some marsupials. Imprinted genes play important roles in the regulation of fetal growth, development, and postnatal behavior, but the study of imprinted genes has been limited in livestock. In this study, the polymorphism-based approach was used to detect the expression patterns of the porcine pleomorphic adenoma gene-like I (PLAGL1) and paternal expression gene 10 (PEG10) genes. Single nucleotide polymorphisms in the exons were detected between the Meishan and Large White breeds in the PLAGL1 and PEG10 genes. The polymorphisms were used to determine the monoallelic or biallelic expression with reverse transcription-PCR-RFLP in 44 tissues from 4 heterozygous pigs (based on SNP). Imprinting analysis indicated that the PLAGL1 and PEG10 genes were both paternally expressed in all tissues tested (heart, liver, spleen, lung, kidney, stomach, small intestine, skeletal muscle, fat, uterus, and ovary). Our study showed that the method of identifying polymorphic transcripts with reverse transcription-PCR-RFLP may be beneficial for detecting the imprinting status of some candidate imprinted genes.
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Affiliation(s)
- F W Zhang
- Key Laboratory of Agricultural Animal Genetics, Breeding, and Reproduction, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
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Zuo B, Xiong YZ, Su YH, Deng CY, Lei MG, Li FE, Zheng R, Jiang SW. QTL analysis of production traits on SSC3 in a Large White×Meishan pig resource family. S AFR J ANIM SCI 2006. [DOI: 10.4314/sajas.v36i2.3994] [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: 11/17/2022]
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25
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Xu DQ, Xiong YZ, Ling XF, Lan J, Liu M, Deng CY, Jiang SW, Lei MG. Identification of a differential gene HUMMLC2B between F1 hybrids Landrace x Yorkshire and their female parents Yorkshire. Gene 2005; 352:118-26. [PMID: 15927424 DOI: 10.1016/j.gene.2005.04.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2005] [Revised: 03/16/2005] [Accepted: 04/07/2005] [Indexed: 10/25/2022]
Abstract
In order to investigate heterosis on a molecular basis, suppression subtractive hybridization was used to analyze the differences in gene expression between porcine F1 hybrids Landrace x Yorkshire and their female parents Yorkshire. From two specific subtractive cDNA libraries, the clones screened out by reverse Northern high-density blots screening were chosen to clone full-length cDNA by RACE. An expression-upregulated gene for Yorkshire skeletal muscle, designated as HUMMLC2B, was identified. Porcine HUMMLC2B contains an open reading frame (ORF) encoding 169 amino acids residues with 59 and 115 nucleotides in the 5' and 3' untranslated regions (UTRs), respectively. In the porcine genome, it contains seven exons separated by six introns. High allelic variations and four SINEs were detected in it. Comparison of derived amino acid sequence of HUMMLC2B with database sequences revealed highly conserved 12 amino acid residues in a putative calcium-binding region. RT-PCR analysis showed a tissue-specific pattern of expression in skeletal muscle and a similar level of expression during skeletal muscle development. The possible role of HUMMLC2B and its relation to porcine heterosis are discussed.
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Affiliation(s)
- D Q Xu
- Agriculture Ministry Key Laboratory of Swine Genetics and Breeding, College of Animal Science, Huazhong Agricultural University, Wuhan 430070, China.
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26
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Zuo B, Xiong YZ, Deng CY, Su YH, Wang J, Lei MG, Li FE, Jiang SW, Zheng R. Polymorphism, linkage mapping and expression pattern of the porcine skeletal muscle glycogen synthase (GYS1) gene. Anim Genet 2005; 36:254-7. [PMID: 15932409 DOI: 10.1111/j.1365-2052.2005.01286.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
The glycogen synthase gene (GYS1), which encodes the rate-limiting enzyme for glycogen synthesis of skeletal muscle, is a promising candidate gene for traits related to skeletal muscle in pigs. In this study, a G/A single nucleotide polymorphism in GYS1 intron 7 detected as a FokI PCR-restriction fragment length polymorphism (PCR-RFLP) showed allele frequency differences among five Chinese indigenous pig breeds and three western commercial pig breeds. Linkage analysis assigned the gene GYS1 to marker interval SW1302-SW1473 on SSC6 in a three-generation Meishan X Large White reference family. The results of association analysis and interval mapping suggested that the FokI PCR-RFLP polymorphism might be linked with the quantitative trait loci affecting carcass traits detected on SSC6 in the F2 intercross pedigree. The reverse transcriptase-polymerase chain reaction revealed that the porcine GYS1 gene was expressed in spleen, lung, liver, kidney, small intestine, skeletal muscle, heart and stomach, with the highest expression in skeletal muscle.
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Affiliation(s)
- B Zuo
- Key Laboratory of Swine Genetics and Breeding, Ministry of Agriculture, College of Animal Science and Veterinary Medicine, Huazhong Agriculture University, Wuhan 430070, China
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27
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Affiliation(s)
- M G Lei
- Key Laboratory of Swine Genetics and Breeding, Ministry of Agriculture, College of Animal Sciences, Huazhong Agricultural University, Wuhan 430070, China
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28
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Abstract
LIM domain proteins are important regulators of the growth, determination and differentiation of cells. Four-and-a-half LIM-only protein 3 (FHL3) is a type of LIM-only protein that contains four tandemly repeated LIM motifs with an N-terminal single zinc finger (half LIM motif). In this study, we have determined the complete coding sequence of pig FHL3 which encodes a 280 amino acid protein. The coding region of the pig FHL3 gene is organized in five exons and spans an approximately 2.1-kb genomic region. Comparative sequencing of six pig breeds revealed three single nucleotide polymorphisms (SNPs) within exon 2 of which an A-->G substitution at position 313 changes a codon for arginine into a codon for glycine. The substitution was situated within a PstI recognition site and developed as a PCR-RFLP marker for further use in population variation investigations and association analysis. The A/G polymorphism was segregating only in Landrace pigs. Association studies of the FHL3 polymorphism with carcass traits provided preliminary evidence that the PstI PCR-restriction fragment length polymorphism (RFLP) genotype may be associated with variation in several carcass traits of interest for pig breeding. Further investigations in more Landrace pigs are needed to confirm this.
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Affiliation(s)
- B Zuo
- Key Laboratory of Swine Genetics and Breeding, Ministry of Agriculture, College of Animal Science and Veterinary Medicine, Huazhong Agriculture University, Wuhan, 430070, China
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29
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Wu ZF, Xiong YZ, I H, Deng CY, Jiang SW. [Polymorphism of porcine hormone sensitive lipase gene and sequencing the partial DNA fragments]. Yi Chuan Xue Bao 2001; 27:686-90. [PMID: 11055120] [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: 02/18/2023]
Abstract
Hormone sensitive lipase (HSL) is a key enzyme in fat metabolism. The polymorphism of the pig HSL gene is studied in this paper. The SSCP (Single Strand Conformational Polymorphism) is found in the HSL gene Exon 8. It shows three genotypes (MM, MN, NN). Fat-type pig breeds of Meishan and Tongcheng pigs have more allele M, with frequencies of 0.690 M and 0.740 M, respectively; however, lean-type pig breeds of Landrace and the Large White pigs have more allele N, with frequencies of 0.847 N and 0.845 N, respectively. PCR fragments representing HSL genotypes MM and NN are sequenced. Two A-->G transitions are detected, and it resulted in corresponding changes of amino acid (Asn-->Asp and Glu-->Gly) in the HSL protein, respectively. The HSL gene can be considered as a candidate gene for fatness in pigs.
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Affiliation(s)
- Z F Wu
- College of Animal Science, Huazhong Agricultural University, Wuhan, China
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30
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He J, Deng CY, Chen RZ, Zhu XN, Yu JP. Long-term potentiation induced by nicotine in CA1 region of hippocampal slice is Ca(2+)-dependent. Acta Pharmacol Sin 2000; 21:429-32. [PMID: 11324441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
Abstract
AIM To observe the effects of Ca2+ on hippocampal long-term potentiation (LTP) induced by nicotine in CA1 region of rat hippocampal slice. METHODS Extracellularly recorded population spikes (PS) of the pyramidal cell layer in the hippocampal CA1 region in vitro. RESULTS Nicotine 1 mumol.L-1 induced LTP in the hippocampal CA1 region. It did not induce LTP in CA1 region when CA2+ was removed from artificial cerebrospinal fluid (ACSF). Nifedipine 1 and 10 mumol.L-1 partly inhibited LTP induced by nicotine, and thapsigargin 1 and 10 mumol.L-1 completely inhibited LTP induced by nicotine. CONCLUSION LTP induced by nicotine in hippocampal CA1 region is Ca(2+)-dependent. Both Ca2+ influx and Ca2+ release participate in the induction of LTP.
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Affiliation(s)
- J He
- Department of Pharmacology, Sun Yat-sen University of Medical Sciences, Guangzhou, 510089, China
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