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Zhao D, Mou X, Li Y, Yao Y, Du L, Li Z, Wang P, Li X, Li X, Chen X, Li Y, Xia J, Fang Z. The application of impulse oscillometry system based on machine learning algorithm in the diagnosis of chronic obstructive pulmonary disease. Physiol Meas 2024. [PMID: 38599216 DOI: 10.1088/1361-6579/ad3d24] [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] [Indexed: 04/12/2024]
Abstract
OBJECTIVE Diagnosing chronic obstructive pulmonary disease (COPD) using Impulse Oscillometry (IOS) is challenging due to the high level of clinical expertise it demands from doctors , which limits the clinical application of IOS in screening. The primary aim of this study is to develop a COPD diagnostic model based on machine learning algorithms using IOS test results.
Approach:Feature selection was conducted to identify the optimal subset of features from the original feature set, which significantly enhanced the classifier's performance. Additionally, secondary features area of reactance (AX) were derived from the original features based on clinical theory, further enhancing the performance of the classifier. The performance of the model was analyzed and validated using various classifiers and hyperparameter settings to identify the optimal classifier. We collected 528 clinical data examples from the China-Japan Friendship Hospital for training and validating the model.
Main results:The proposed model achieved reasonably accurate diagnostic results in the clinical data (accuracy=0.920, specificity=0.941, precision=0.875, recall=0.875).
Significance:The results of this study demonstrate that the proposed classifier model, feature selection method, and derived secondary feature AX provide significant auxiliary support in reducing the requirement for clinical experience in COPD diagnosis using IOS.
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Affiliation(s)
- Dongfang Zhao
- Chinese Academy of Sciences Aerospace Information Research Institute, Beijing, Beijing, 100094, CHINA
| | - Xiuying Mou
- Chinese Academy of Sciences Aerospace Information Research Institute, Beijing, Beijing, 100089, CHINA
| | - Yueqi Li
- Chinese Academy of Sciences Aerospace Information Research Institute, Beijing, Beijing, Beijing, 100094, CHINA
| | - Yicheng Yao
- Chinese Academy of Sciences Aerospace Information Research Institute, Beijing, Beijing, Beijing, 100094, CHINA
| | - Lidong Du
- State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing, Beijing, 100094, CHINA
| | - ZhenFeng Li
- 1, Aerospace Information Research Institute, Chinese Academy of Sciences (AIRCAS), Beijing 100190, China;, Beijing, 100190, CHINA
| | - Peng Wang
- Chinese Academy of Sciences Aerospace Information Research Institute, Zhong Guan Cun Street, Hai Dian, Beijing, Beijing, 100094, CHINA
| | - Xiaopan Li
- China-Japan Friendship Hospital, Beijing, Beijing, Beijing, 100029, CHINA
| | - Xiaoran Li
- Beijing Friendship Hospital, Capital Medical University, Beijing, Beijing, 100029, CHINA
| | - Xianxiang Chen
- Chinese Academy of Sciences Aerospace Information Research Institute, 1, Beijing, Beijing, 100094, CHINA
| | - Yong Li
- China-Japan Friendship Hospital, Beijing, Beijing, Beijing, 100029, CHINA
| | - Jingen Xia
- China-Japan Friendship Hospital, Beijing, Beijing, Beijing, 100029, CHINA
| | - Zhen Fang
- Institute of Electronics Chinese Academy of Sciences, Beijing, Beijing, 100094, CHINA
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He YR, Li ZF, Zhong Q, Wang Y, Wang XY, Huang JW, Huang ZG, Fang JG. [Application of near-infrared autofluorescence imaging-based convolution neural network in recognition of parathyroid gland]. Zhonghua Yi Xue Za Zhi 2023; 103:3193-3198. [PMID: 37879873 DOI: 10.3760/cma.j.cn112137-20230726-01230] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 10/27/2023]
Abstract
Objective: To investigate the application value of near-infrared autofluorescence imaging-based convolution neural network (CNN) for automatic recognition of parathyroid gland. Methods: The data of 83 patients who underwent thyroid papillary cancer surgery in the Department of Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University from August 2020 to March 2022 were retrospectively analyzed, and a total of 725 autofluorescence images of parathyroid gland were collected during the surgery. Meanwhile, non-parathyroid fluorescence imaging videos in the operation area of 10 patients were also collected, and 928 non-parathyroid fluorescence images were captured from those videos. The fluorescence images of parathyroid and non-parathyroid glands were directly used as input features for deep learning to construct ResNet 34, VGGNet 16 and GoogleNet models for automatic parathyroid identification. The ability of different models to identify parathyroid glands was tested by indicators such as accuracy, specificity, sensitivity, precision, receiver operating characteristic curve and area under the curve (AUC). In addition, 30 fluorescence images of parathyroid and 35 fluorescence images of non-parathyroid glands in 13 patients with papillary thyroid cancer from March to May 2022 were collected to prospectively test the best performing CNN model. Results: Among the 83 patients, there were 25 males and 58 females, with the mean age of (46.7±12.4) years. In the binary classification (parathyroid gland and non-parathyroid gland), the ResNet 34 model performed the best in different CNN models, the accuracy, specificity, sensitivity and precision of the identification test set were 97.6%, 96.3%, 99.3% and 95.5%, and the AUC reached 0.978 (95%CI: 0.956-0.991). In the prospective test, the prediction accuracy of the ResNet 34 model reached 93.8%, and the AUC was 0.938 (95%CI: 0.853-0.984). Conclusion: The near-infrared autofluorescence imaging-based deep CNN has good application value in the automatic recognition of parathyroid gland, and can be used to assist the recognition and protection of parathyroid gland in thyroid cancer surgery.
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Affiliation(s)
- Y R He
- Department of Otolaryngology-Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Key Laboratory of Otolaryngology-Head and Neck Surgery (Capital Medical University), Ministry of Education, Beijing 100730, China
| | - Z F Li
- Department of Otolaryngology-Head and Neck Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
| | - Q Zhong
- Department of Otolaryngology-Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Key Laboratory of Otolaryngology-Head and Neck Surgery (Capital Medical University), Ministry of Education, Beijing 100730, China
| | - Y Wang
- Department of Otolaryngology-Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Key Laboratory of Otolaryngology-Head and Neck Surgery (Capital Medical University), Ministry of Education, Beijing 100730, China
| | - X Y Wang
- Department of Otolaryngology-Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Key Laboratory of Otolaryngology-Head and Neck Surgery (Capital Medical University), Ministry of Education, Beijing 100730, China
| | - J W Huang
- Department of Otolaryngology-Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Key Laboratory of Otolaryngology-Head and Neck Surgery (Capital Medical University), Ministry of Education, Beijing 100730, China
| | - Z G Huang
- Department of Otolaryngology-Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Key Laboratory of Otolaryngology-Head and Neck Surgery (Capital Medical University), Ministry of Education, Beijing 100730, China
| | - J G Fang
- Department of Otolaryngology-Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Key Laboratory of Otolaryngology-Head and Neck Surgery (Capital Medical University), Ministry of Education, Beijing 100730, China
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Yang J, Shen F, Huyan MH, Wang LJ, Shen HJ, Xing PF, Hua WL, Zhang L, Li ZF, Yang PF, Zhang YW, Liu JM. [Influencing factors of futile recanalization after endovascular therapy in acute ischemic stroke patients with large vessel occlusions]. Zhonghua Yi Xue Za Zhi 2023; 103:2218-2224. [PMID: 37544757 DOI: 10.3760/cma.j.cn112137-20230218-00231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 08/08/2023]
Abstract
Objective: To analyze the influencing factors of futile recanalization after endovascular therapy (EVT) in acute ischemic stroke patients with large vessel occlusions (AIS-LVO). Methods: AIS-LVO patients who underwent EVT with successful recanalization between January 2019 and December 2021 in Neurovascular Center of Changhai Hospital of Naval Medical University were retrospectively selected. Modified Rankin scale (mRS) score 3 months after EVT was used as the prognostic evaluation index, and patients with mRS scores≤2 were classified as the meaningful recanalization group and mRS scores 3-6 as the futile recanalization group. The risk factors, National Institutes of Health stroke scale (NIHSS) score, Glasgow coma scale (GCS) score, Alberta Stroke Program Early CT (ASPECT) score, core infarct volume, etc. in both groups were analyzed, and the influencing factors of futile recanalization after EVT were analyzed by multivariate logistic regression. Continuous variables that do not conform to the normal distribution are represented by [M(Q1,Q3)]. Results: A total of 368 patients meeting the inclusion criteria were collected, including 228 males and 140 females, and aged 68 (61, 77) years. There are 196 patients and 172 patients in the meaningful recanalization and futile recanalization groups, respectively, with the rate of futile recanalization 3 months after EVT of 46.74% (172/368). Comparing the general information and risk factors between the two groups found that the age of patients in the futile recanalization group [71 (65, 79) years] was higher than that in the meaningful recanalization group [65 (59, 72) years]. The baseline NIHSS score [18 (14, 22)] and the rate of not achieving modified Thrombolysis in Cerebral Ischemia grade 3 (mTICI 3) reperfusion (36.1%) were higher in the futile recanalization group than those in the meaningful recanalization group [12 (7, 17) and 19.9%]. The baseline GCS score [11 (9, 13)] was lower in the futile recanalization group than that in the meaningful recanalization group [14 (11, 15)]. The core infarct volume in the futile recanalization group [28 (7, 65) ml] was larger than that in the meaningful recanalization group [6 (0, 17) ml]. The ASPECT score [7 (5, 9)] was lower in the futile recanalization group than that in the meaningful recanalization group [9 (7, 10)]. In addition, the proportion of hypertension, atrial fibrillation, general anesthesia, and symptomatic intracranial hemorrhage was higher in the futile recanalization group (all P<0.05). The time from symptom onset to puncture and from symptom onset to reperfusion was longer in the futile recanalization group (both P<0.05). There were statistically significant differences in trial of Org 10172 in acute stroke treatment (TOAST) classification and the site of occluded blood vessels between the two groups (both P<0.05). Multivariate logistic regression indicated that age ≥80 years(OR=1.935,95%CI: 1.168-3.205), baseline NIHSS score (OR=1.999,95%CI: 1.202-3.325), GCS score (OR=2.299,95%CI: 1.386-3.814), previous stroke history (OR=1.977,95%CI: 1.085-3.604), general anesthesia (OR=1.981,95%CI: 1.143-3.435), not achieving grade 3 recanalization (OR=2.846, 95%CI: 1.575-5.143), ASPECT score<6 (OR=2.616, 95%CI: 1.168-5.857), and core infarct volume>70 ml (OR=2.712, 95%CI: 1.130-6.505) were risk factors for futile recanalization. Conclusion: Age≥80 years, previous stroke history, baseline NIHSS score≥20, GCS score≤8, general anesthesia, ASPECT score<6, core infarct volume>70 ml, and failure to achieve Grade 3 recanalization are independent influencing factors for futile recanalization after endovascular therapy in AIS-LVO patients.
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Affiliation(s)
- J Yang
- Neurovascular Center, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - F Shen
- Neurovascular Center, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - M H Huyan
- Neurovascular Center, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - L J Wang
- Neurovascular Center, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - H J Shen
- Neurovascular Center, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - P F Xing
- Neurovascular Center, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - W L Hua
- Neurovascular Center, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - L Zhang
- Neurovascular Center, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - Z F Li
- Neurovascular Center, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - P F Yang
- Neurovascular Center, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - Y W Zhang
- Neurovascular Center, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - J M Liu
- Neurovascular Center, Changhai Hospital, Naval Medical University, Shanghai 200433, China
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Zhang H, Xu WW, Chen CD, Ge CS, Zheng ZG, Duan CL, Xue GW, Cai YD, Zhang W, Wang L, Sun ZM, Li ZF, Du CL, Gao Y, Zhang JL. [A prospective study of position selection combined with autologous blood intrathoracic infusion in the treatment of postoperative persistent air leakage with an unexpanded lung]. Zhonghua Jie He He Hu Xi Za Zhi 2023; 46:404-407. [PMID: 36990705 DOI: 10.3760/cma.j.cn112147-20220705-00563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
Abstract
We prospectively studied 17 patients with spontaneous pneumothorax or giant emphysematous bulla at Rizhao Hospital of Traditional Chinese Medicine from October 2020 to March 2022. All patients underwent thoracoscopic interventional therapy, had experienced continued air leakage for 3 days with closed thoracic drainage postoperatively, had an unexpanded lung on CT, and/or failed to intervention with position selection combined with intra-pleural thrombin injection(referred to as "position plus1.0"). They were all treated with position selection combined with autologous blood (100 ml) and thrombin (5 000 U) intra-pleural injection(referred to as "position plus 2.0").The success rate of the "position plus 2.0" intervention was 16/17, and the recurrence rate was 3/17. There were four cases of fever, four cases of pleural effusion, one case of empyema, and no other adverse reactions. This study has shown that the "position plus 2.0" intervention is safe, effective, and simple for patient with persistent air leakage failed to intervention with"position plus 1.0" after thoracoscopic treatment of pulmonary and pleural diseases related to bulla.
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Affiliation(s)
- H Zhang
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - W W Xu
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - C D Chen
- Department of Respiratory Medicine, Rizhao People's Hospital, Rizhao 276800, China
| | - C S Ge
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - Z G Zheng
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - C L Duan
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - G W Xue
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - Y D Cai
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - W Zhang
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - L Wang
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - Z M Sun
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - Z F Li
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - C L Du
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - Y Gao
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - J L Zhang
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
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He J, Li ZF, Qi TF, Hou Z, Koh TS. Combined Estimation of B1 and T1 for Dynamic Contrast-Enhanced MRI by Accounting for Incomplete Spoiling of Transverse Magnetization. Biomed Phys Eng Express 2023; 9. [PMID: 36896591 DOI: 10.1088/2057-1976/acc318] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 03/06/2023] [Indexed: 03/11/2023]
Abstract
OBJECTIVE The variable flip angle (VFA) method for longitudinal relaxation time (T1) measurement is inherently sensitive to inaccuracies in the radiofrequency transmit field (B1) and incomplete spoiling of transverse magnetization. The objective of this study is to devise a computational method that addresses the problems of incomplete spoiling and B1 inhomogeneity in the estimation of T1 using VFA method. APPROACH Using an analytical expression of the gradient echo signal with account of incomplete spoiling, we first showed that ill-posedness in the simultaneous estimation of B1 and T1 can be lifted with the use of flip angles larger than the Ernst angle. We then devised a nonlinear optimization method based on this signal model of incomplete spoiling for simultaneous estimation of B1 and T1. MAIN RESULTS We evaluated the proposed method on a graded-concentration phantom to show that the derived T1 estimates offers an improvement over the regular VFA method and compares well with reference values measured by inversion recovery. Reduction of the number of flip angles from 17 to 5 yielded consistent results indicating that the proposed method is numerically stable. T1 estimates derived from in-vivo brain imaging were consistent with literature values for gray and white matter tissues. SIGNIFICANCE Contrary to the common notion that B1 correction in the VFA method for T1 mapping should be performed separately, we show that combined estimation of B1 and T1 is feasible by the proposed method simply with the acquisition of 5 flip angles, as demonstrated on both phantom and in-vivo imaging data.
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Affiliation(s)
- Jingyao He
- Department of Oncologic Imaging, National Cancer Centre Singapore, 11 HOSPITAL DRIVE, Singapore, SINGAPORE, 169610, SINGAPORE
| | - Z F Li
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, Kunming China 650032, Kunming, 650032, CHINA
| | - T F Qi
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, Kunming China 650032, Kunming, 650032, CHINA
| | - Zujun Hou
- Jiangsu Key Laboratory of Medical Optics, Suzhou Institute of Biomedical Engineering and Technology, Suzhou, China 215163, Suzhou, 215163, CHINA
| | - Tong San Koh
- Department of Oncologic Imaging, National Cancer Centre Singapore, 11 HOSPITAL DRIVE, Singapore, SINGAPORE, 169610, SINGAPORE
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Zhang H, Duan CL, Xue GW, Xu WW, Ge CS, Cai YD, Zheng ZG, Du CL, Gao Y, Zhang JL, Li ZF, Zhang W, Wang L. [Effectiveness and safety of medical glue assisted argon plasma coagulation union giant emphysematous bulla volume reduction via thoracoscope on the treatment of spontaneous pneumothorax with subpleural bullae]. Zhonghua Jie He He Hu Xi Za Zhi 2022; 45:1204-1208. [PMID: 36480851 DOI: 10.3760/cma.j.cn112147-20221014-00820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Objective: To evaluate the effectiveness and safety of a new treatment protocol that combined "medical glue assisted argon plasma coagulation"(hereinafter called "APC plus") and "giant emphysematous bulla volume reduction"(hereinafter called "one thoracoscope plus one needle") via medical thoracoscopy on the spontaneous pneumothorax patients whose chest high resolution CT (HRCT) showed multiple subpleural bullae (SPB) and at least one SPB≥4 cm in diameter. Methods: A retrospective analysis was performed on the clinical data of 46 cases of spontaneous pneumothorax with multiple SPB(at least one SPB≥4 cm in diameter), 42 males and 4 females, aged from 31 to 79 (68.5±10.3) years,from June 2018 to December 2021 in Rizhao Hospital of Traditional Chinese Medicine. The time of air leakage discontinuance, the disappearance rate and reduction degree of target subpleural blebs one week after operation, the degree of reduction and the incidence of postoperative complications were observed. Two-year follow-up after operation was carried out to assess the recurrence rate and its short- and long-term complications. Results: Among the 46 patients, SPB disappeared or nearly disappeared in 39 cases (84.78%), decreased in number or reduced in volume in 5 cases (10.87%), and remained unchanged in 2 cases (4.35%) after the intervention of "APC Plus"; 40 patients stopped leaking within 1 week and 6 cases stopped leaking over a week. Eleven patients finished the 3-year follow-up, 13 finished 2-year follow-up and 6 finished 1-year follow-up, with only 1 relapse. No serious complications occurred in all these 46 patients. Conclusion: "APC plus" combining with "one thoracoscope plus one needle" is safe and effective in the treatment of pneumothorax patients with multiple subpleural bullae of varying sizes.
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Affiliation(s)
- H Zhang
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - C L Duan
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - G W Xue
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - W W Xu
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - C S Ge
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - Y D Cai
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - Z G Zheng
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - C L Du
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - Y Gao
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - J L Zhang
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - Z F Li
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - W Zhang
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - L Wang
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
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Wang F, Yang YY, Wan DB, Li JD, Liang YF, Li ZF, Shen YD, Xu ZL, Yang JY, Wang H, Gettemans J, Hammock BD, Sun YM. Nanobodies for accurate recognition of iso-tenuazonic acid and development of sensitive immunoassay for contaminant detection in foods. Food Control 2022; 136. [DOI: 10.1016/j.foodcont.2022.108835] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Chen ZJ, Wu HL, Shen YD, Wang H, Zhang YF, Hammock B, Li ZF, Luo L, Lei HT, Xu ZL. Phosphate-triggered ratiometric fluoroimmunoassay based on nanobody-alkaline phosphatase fusion for sensitive detection of 1-naphthol for the exposure assessment of pesticide carbaryl. J Hazard Mater 2022; 424:127411. [PMID: 34629198 PMCID: PMC8877597 DOI: 10.1016/j.jhazmat.2021.127411] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [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: 06/10/2021] [Revised: 09/20/2021] [Accepted: 09/30/2021] [Indexed: 05/21/2023]
Abstract
The excessive use of carbaryl has resulted in the risk of its exposure. In this study, we isolated six nanobodies (Nbs) from a camelid phage display library against the biomarker of carbaryl, 1-naphthol (1-NAP). Owing to its characteristics of easy genetic modifications, we produced a nanobody-alkaline phosphatase (Nb-CC4-ALP) fusion protein with good stability. A dual-emission system based ratiometric fluoroimmunoassay (RFIA) for quick and highly sensitive determination of 1-NAP was developed. Silicon nanoparticles (SiNPs) was used as an internal reference and for aggregation-induced emission enhancement (AIEE) of gold nanoclusters (AuNCs), while AuNCs could be quenched by MnO2 via oxidation. In the presence of ALP, ascorbic acid phosphate (AAP) can be transformed into ascorbic acid (AA), the later can etch MnO2 to recover the fluorescence of the AuNCs. Based on optimal conditions, the proposed assay showed 220-fold sensitivity improvement in comparison with conventional monoclonal antibody-based ELISA. The recovery test of urine samples and the validation by standard HPLC-FLD demonstrated the proposed assay was an ideal tool for screening 1-NAP and provided technical support for the monitoring of carbaryl exposure.
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Affiliation(s)
- Zi-Jian Chen
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Hui-Ling Wu
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Yu-Dong Shen
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China.
| | - Hong Wang
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Yi-Feng Zhang
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Bruce Hammock
- Department of Entomology and UCD Comprehensive Cancer Center, University of California, Davis, CA 95616, United States
| | - Zhen-Feng Li
- Department of Entomology and UCD Comprehensive Cancer Center, University of California, Davis, CA 95616, United States; Guangdong Hengrui Pharmaceutical Co., Ltd., Guangzhou 510799, China
| | - Lin Luo
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Hong-Tao Lei
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Zhen-Lin Xu
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China.
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Zhang XF, Liu Y, Li JH, Lei P, Zhang XY, Wan Z, Lei T, Zhang N, Wu XN, Long ZD, Li ZF, Wang B, Liu XM, Wu Z, Chen X, Wang JX, Yuan P, Li Y, Zhou J, Pawlik M, Lyu Y. [Effect of splenectomy on the risk of hepatocellular carcinoma development among patients with liver cirrhosis and portal hypertension: a multi-institutional cohort study]. Zhonghua Wai Ke Za Zhi 2021; 59:821-828. [PMID: 34619907 DOI: 10.3760/cma.j.cn112139-20210713-00308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To identify whether splenectomy for treatment of hypersplenism has any impact on development of hepatocellular carcinoma(HCC) among patients with liver cirrhosis and hepatitis. Methods: Patients who underwent splenectomy for hypersplenism secondary to liver cirrhosis and portal hypertension between January 2008 and December 2012 were included from seven hospitals in China, whereas patients receiving medication treatments for liver cirrhosis and portal hypertension (non-splenectomy) at the same time period among the seven hospitals were included as control groups. In the splenectomy group, all the patients received open or laparoscopic splenectomy with or without pericardial devascularization. In contrast, patients in the control group were treated conservatively for liver cirrhosis and portal hypertension with medicines (non-splenectomy) with no invasive treatments, such as transjugular intrahepatic portosystemic shunt, splenectomy or liver transplantation before HCC development. All the patients were routinely screened for HCC development with abdominal ultrasound, liver function and alpha-fetoprotein every 3 to 6 months. To minimize the selection bias, propensity score matching (PSM) was used to match the baseline data of patients among splenectomy versus non-splenectomy groups. The Kaplan-Meier method was used to calculate the overall survival and cumulative incidence of HCC development, and the Log-rank test was used to compare the survival or disease rates between the two groups. Univariate and Cox proportional hazard regression models were used to analyze the potential risk factors associated with development of HCC. Results: A total of 871 patients with liver cirrhosis and hypertension were included synchronously from 7 tertiary hospitals. Among them, 407 patients had a history of splenectomy for hypersplenism (splenectomy group), whereas 464 patients who received medical treatment but not splenectomy (non-splenectomy group). After PSM,233 pairs of patients were matched in adjusted cohorts. The cumulative incidence of HCC diagnosis at 1,3,5 and 7 years were 1%,6%,7% and 15% in the splenectomy group, which was significantly lower than 1%,6%,15% and 23% in the non-splenectomy group (HR=0.53,95%CI:0.31 to 0.91,P=0.028). On multivariable analysis, splenectomy was independently associated with decreased risk of HCC development (HR=0.55,95%CI:0.32 to 0.95,P=0.031). The cumulative survival rates of all the patients at 1,3,5,and 7 years were 100%,97%,91%,86% in the splenectomy group,which was similar with that of 100%,97%,92%,84% in the non-splenectomy group (P=0.899). In total,49 patients (12.0%) among splenectomy group and 75 patients (16.2%) in non-splenectomy group developed HCC during the study period, respectively. Compared to patients in non-splenectomy group, patients who developed HCC after splenectomy were unlikely to receive curative resection for HCC (12.2% vs. 33.3%,χ²=7.029, P=0.008). Conclusion: Splenectomy for treatment of hypersplenism may decrease the risk of HCC development among patients with liver cirrhosis and portal hypertension.
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Affiliation(s)
- X F Zhang
- Department of Hepatobiliary Surgery,the First Affiliated Hospital of Xi'an Jiaotong University;Institute of Advanced Surgical Technology and Engineering,Xi'an Jiaotong University;National-Local Joint Engineering Research Center for Precision Surgery and Regenerative Medicine,Xi'an 710061,China
| | - Y Liu
- Department of General Surgery,the Second Affiliated Hospital of Xi'an Jiaotong University,Xi'an 710004,China
| | - J H Li
- Department of Surgical Oncology,Shaanxi Provincial People's Hospital;Institute of Advanced Surgical Technology and Engineering, Xi'an Jiaotong University;National-Local Joint Engineering Research Center for Precision Surgery and Regenerative Medicine,Xi'an 710068,China
| | - P Lei
- Department of Hepatobiliary Surgery,General Hospital of Ningxia Medical University,Yinchuan 750003,China
| | - X Y Zhang
- Department of Hepatobiliary Surgery,Binzhou Medical University Hospital,Binzhou 256603,Shandong Province,China
| | - Z Wan
- Department of General Surgery,the First Affiliated Hospital of Nanchang University,Nanchang 330006,China
| | - T Lei
- Department of Hepabobiliary Surgery,the Affiliated Hospital of Shanxi University of Chinese Medicine,Xianyang 710077,Shanxi Province,China
| | - N Zhang
- Department of Hepatobiliary Surgery,the First Affiliated Hospital of Xi'an Jiaotong University;Institute of Advanced Surgical Technology and Engineering,Xi'an Jiaotong University;National-Local Joint Engineering Research Center for Precision Surgery and Regenerative Medicine,Xi'an 710061,China
| | - X N Wu
- Department of Hepatobiliary Surgery,the First Affiliated Hospital of Xi'an Jiaotong University;Institute of Advanced Surgical Technology and Engineering,Xi'an Jiaotong University;National-Local Joint Engineering Research Center for Precision Surgery and Regenerative Medicine,Xi'an 710061,China
| | - Z D Long
- Department of General Surgery,Jingzhou Hospital of Tongji Medical College,Huazhong University of Science and Technology;Institute of Advanced Surgical Technology and Engineering, Xi'an Jiaotong University;National-Local Joint Engineering Research Center for Precision Surgery and Regenerative Medicine,Jingzhou 434022,Hubei Province,China
| | - Z F Li
- Department of General Surgery,the Second Affiliated Hospital of Xi'an Jiaotong University,Xi'an 710004,China
| | - B Wang
- Department of Hepatobiliary Surgery,the First Affiliated Hospital of Xi'an Jiaotong University;Institute of Advanced Surgical Technology and Engineering,Xi'an Jiaotong University;National-Local Joint Engineering Research Center for Precision Surgery and Regenerative Medicine,Xi'an 710061,China
| | - X M Liu
- Department of Hepatobiliary Surgery,the First Affiliated Hospital of Xi'an Jiaotong University;Institute of Advanced Surgical Technology and Engineering,Xi'an Jiaotong University;National-Local Joint Engineering Research Center for Precision Surgery and Regenerative Medicine,Xi'an 710061,China
| | - Z Wu
- Department of Hepatobiliary Surgery,the First Affiliated Hospital of Xi'an Jiaotong University;Institute of Advanced Surgical Technology and Engineering,Xi'an Jiaotong University;National-Local Joint Engineering Research Center for Precision Surgery and Regenerative Medicine,Xi'an 710061,China
| | - X Chen
- Department of General Surgery,the Second Affiliated Hospital of Xi'an Jiaotong University,Xi'an 710004,China
| | - J X Wang
- Department of Surgical Oncology,Shaanxi Provincial People's Hospital;Institute of Advanced Surgical Technology and Engineering, Xi'an Jiaotong University;National-Local Joint Engineering Research Center for Precision Surgery and Regenerative Medicine,Xi'an 710068,China
| | - P Yuan
- Department of Hepatobiliary Surgery,General Hospital of Ningxia Medical University,Yinchuan 750003,China
| | - Y Li
- Department of General Surgery,the First Affiliated Hospital of Nanchang University,Nanchang 330006,China
| | - J Zhou
- Department of Hepabobiliary Surgery,the Affiliated Hospital of Shanxi University of Chinese Medicine,Xianyang 710077,Shanxi Province,China
| | - M Pawlik
- Department of Surgery,the Ohio State University,Columbus 15213,Ohio,USA
| | - Y Lyu
- Department of Hepatobiliary Surgery,the First Affiliated Hospital of Xi'an Jiaotong University;Institute of Advanced Surgical Technology and Engineering,Xi'an Jiaotong University;National-Local Joint Engineering Research Center for Precision Surgery and Regenerative Medicine,Xi'an 710061,China
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10
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Zhao Y, Wang M, Zhang M, Yang X, Li Z, Vasylieva N, Tan G, Wang B, Hammock BD. Development of a direct competitive enzyme-linked immunosorbent assay for quantitation of sodium saccharin residue in food. J Food Sci 2021; 86:3720-3729. [PMID: 34309034 DOI: 10.1111/1750-3841.15767] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 04/08/2021] [Accepted: 04/14/2021] [Indexed: 11/29/2022]
Abstract
Sodium saccharin is a common artificial sweetener. However, due to its possible carcinogenic effects and causing metabolic disorders, many countries have strictly regulated its use in food. In the study, we prepared a specific monoclonal antibody (mAb 2H11) using the new hapten (6-carboxylsaccharin) and developed a direct competitive enzyme-linked immunosorbent assay (dcELISA) for the screening of sodium saccharin residue in food. The half-maximum inhibition concentration (IC50 ) and working range (IC20 -IC80 , the concentrations causing 20% and 80% inhibition by sodium saccharin) were 32.5 and 6.47 to 164 ng/mL, which was 6.5 times more sensitive than the previously reported immunoassay. The average recoveries of sodium saccharin in spiked food samples detected by dcELISA ranged from 82.1% to 117%. Among 70 food samples bought in the physical stores and online, sodium saccharin residues were only detected in four samples purchased online (one canned pineapple, two winter jujube, and one kimchi). The content measured by dcELISA agreed well with those determined by ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). The developed dcELISA was proved to be a sensitive and accurate method for determining sodium saccharin in food. PRACTICAL APPLICATION: Quantitation of sodium saccharin residue in food is very necessary and important for consumers and regulatory agencies.
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Affiliation(s)
- Yajie Zhao
- College of Agriculture and Biotechnology, China Agricultural University, Beijing, China.,Department of Entomology and UCD Comprehensive Cancer Center, University of California, Davis, California, USA
| | - Mian Wang
- College of Agriculture and Biotechnology, China Agricultural University, Beijing, China
| | - Man Zhang
- College of Agriculture and Biotechnology, China Agricultural University, Beijing, China
| | - Xiaolin Yang
- College of Agriculture and Biotechnology, China Agricultural University, Beijing, China
| | - ZhenFeng Li
- College of Agriculture and Biotechnology, China Agricultural University, Beijing, China
| | - Natalia Vasylieva
- Department of Entomology and UCD Comprehensive Cancer Center, University of California, Davis, California, USA
| | - Guiyu Tan
- College of Agriculture and Biotechnology, China Agricultural University, Beijing, China
| | - Baomin Wang
- College of Agriculture and Biotechnology, China Agricultural University, Beijing, China
| | - Bruce D Hammock
- Department of Entomology and UCD Comprehensive Cancer Center, University of California, Davis, California, USA
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11
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Wang F, Li ZF, Wan DB, Vasylieva N, Shen YD, Xu ZL, Yang JY, Gettemans J, Wang H, Hammock BD, Sun YM. Enhanced Non-Toxic Immunodetection of Alternaria Mycotoxin Tenuazonic Acid Based on Ferritin-Displayed Anti-Idiotypic Nanobody-Nanoluciferase Multimers. J Agric Food Chem 2021; 69:4911-4917. [PMID: 33870684 DOI: 10.1021/acs.jafc.1c01128] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The non-toxic immunoassay for mycotoxins is being paid more attention due to its advantages of higher safety and cost savings by using anti-idiotype antibodies to substitute toxins. In this study, with tenuazonic acid (TeA), a kind of highly toxic Alternaria mycotoxin as the target, an enhanced non-toxic immunoassay was developed based on the ferritin-displayed anti-idiotypic nanobody-nanoluciferase multimers. First, three specific β-type anti-idiotype nanobodies (AId-Nbs) bearing the internal image of TeA mycotoxin were selected from an immune phage display library. Then, the AId-Nb 2D with the best performance was exploited to generate a nanoluciferase (Nluc)-functionalized fusion monomer, by which a one-step non-toxic immunodetection format for TeA was established and proven to be effective. To further improve the affinity of the monomer, a ferritin display strategy was used to prepare 2D-Nluc fusion multimers. Finally, an enhanced bioluminescent enzyme immunoassay (BLEIA) was established in which the half maximal inhibitory concentration (IC50) for TeA was 6.5 ng/mL with a 10.5-fold improvement of the 2D-based enzyme-linked immunosorbent assay (ELISA). The proposed assay exhibited high selectivities and good recoveries of 80.0-95.2%. The generated AId-Nb and ferritin-displayed AId-Nb-Nluc multimers were successfully extended to the application of TeA in food samples. This study brings a new strategy for production of multivalent AId-Nbs and non-toxic immunoassays for trace toxic contaminants.
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Affiliation(s)
- Feng Wang
- College of Food Science, Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, P. R. China
| | - Zhen-Feng Li
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
- Guangzhou Nabo Antibody Technology Co. Ltd., Guangzhou 510530, P. R. China
| | - De-Bin Wan
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
| | - Natalia Vasylieva
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
| | - Yu-Dong Shen
- College of Food Science, Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, P. R. China
| | - Zhen-Lin Xu
- College of Food Science, Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, P. R. China
| | - Jin-Yi Yang
- College of Food Science, Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, P. R. China
| | - Jan Gettemans
- Department of Biomolecular Medicine, Faculty of Medicine and Health Sciences, Ghent University, Ghent B-9000, Belgium
| | - Hong Wang
- College of Food Science, Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, P. R. China
| | - Bruce D Hammock
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
| | - Yuan-Ming Sun
- College of Food Science, Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, P. R. China
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12
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Han Y, Xia J, Jin L, Qiao A, Su T, Li Z, Xiong J, Wang H, Zhang Z. Computational fluid dynamics study of the effect of transverse sinus stenosis on the blood flow pattern in the ipsilateral superior curve of the sigmoid sinus. Eur Radiol 2021; 31:6286-6294. [PMID: 33492472 DOI: 10.1007/s00330-020-07630-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 11/18/2020] [Accepted: 12/11/2020] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To investigate the effect of different types of transverse sinus stenosis on blood flow patterns in the ipsilateral superior curve of the sigmoid sinus. METHODS According to the morphology of transverse and sigmoid sinus sections in pulsatile tinnitus patients, ten idealized models with different degrees and positions of transverse sinus stenosis were constructed. Computational fluid dynamics simulations were performed to compare the hemodynamic characteristics among these models. Follow-up images of previous cases were included, which preliminarily confirmed the hypothesis that bone plate erosion of the sigmoid sinus sulcus is related to blood flow impingement. RESULTS Blood flow impingement on the superior curve of the sigmoid sinus wall intensified with increasing degree of stenosis and decreased with increasing distance between the stenosis and the sigmoid sinus. The impact zone was generally confined to the anterior and lateral walls of the superior curve of the sigmoid sinus. When the stenosis was located far from the middle of the transverse sinus, the blood flow impingement on the sigmoid sinus wall was very weak. CONCLUSIONS When stenosis is located far from the sigmoid sinus, the causes of tinnitus should be comprehensively considered instead of assuming that stenosis is the main cause. Bone plate erosion of the sigmoid sinus sulcus was promoted by blood flow impingement. KEY POINTS • Ten idealized models with different degrees and positions of stenosis were constructed. • The causes of pulsatile tinnitus should be comprehensively considered. • Sigmoid sinus plate dehiscence was promoted by blood flow impingement.
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Affiliation(s)
- Yanjing Han
- Department of Interventional Radiography, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China
| | - Jun Xia
- College of Life Science and Bioengineering, Beijing University of Technology, Beijing, 100124, China
| | - Long Jin
- Department of Interventional Radiography, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China.
| | - Aike Qiao
- College of Life Science and Bioengineering, Beijing University of Technology, Beijing, 100124, China.
| | - Tianhao Su
- Department of Interventional Radiography, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China
| | - ZhenFeng Li
- Department of Interventional Radiography, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China
| | - Jianping Xiong
- Department of Interventional Radiography, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China
| | - Haochen Wang
- Department of Interventional Radiography, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China
| | - Zhiyuan Zhang
- Department of Interventional Radiography, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China
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13
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Li ZF, Dong JX, Vasylieva N, Cui YL, Wan DB, Hua XD, Huo JQ, Yang DC, Gee SJ, Hammock BD. Highly specific nanobody against herbicide 2,4-dichlorophenoxyacetic acid for monitoring of its contamination in environmental water. Sci Total Environ 2021; 753:141950. [PMID: 32906044 PMCID: PMC7674261 DOI: 10.1016/j.scitotenv.2020.141950] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [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: 07/15/2020] [Revised: 08/22/2020] [Accepted: 08/22/2020] [Indexed: 05/27/2023]
Abstract
2,4-dichlorophenoxyacetic acid (2,4-D), a widely used herbicide, is a small organic chemical pollutant in the environment. To develop a nanobody-based immunoassay for monitoring trace levels of 2,4-D, a step-wise strategy for the generation of nanobodies highly specific against this small chemical was employed. Firstly, we synthesized three novel haptens mimicking 2,4-D and assessed their influence on the sensitivity and specificity of the existing antibody-based assay. Polyclonal antibodies (pAb) from rabbits showed good sensitivity and moderate specificity for 2,4-D, pAb from llama based on selected haptens showed similar performance when compared to those from rabbits. Secondly, nanobodies derived from llama were generated for 2,4-D by an effective procedure, including serum monitoring and one-step library construction. One nanobody, NB3-9, exhibited good sensitivity against 2,4-D (IC50 = 29.2 ng/mL) had better specificity than the rabbit pAb#1518, with no cross-reactivities against the 2,4-D analogs tested. Thirdly, one-step fluorescent enzyme immunoassay (FLEIA) for 2,4-D based on a nanobody-alkaline phosphatase (AP) fusion was developed with IC50 of 1.9 ng/mL and a linear range of 0.4-8.6 ng/mL. Environmental water samples were analyzed by FLEIA and LC-MS/MS for comparison, and the results were consistent between both methods. Therefore, the proposed step-wise strategy from hapten design to nanobody-AP fusion production was successfully conducted, and the resulting nanobody based FLEIA was demonstrated as a convenient tool to monitor 2,4-D residuals in the environment.
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Affiliation(s)
- Zhen-Feng Li
- Department of Entomology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States; Guangzhou Nabo Antibody Technology Co. Ltd, Guangzhou 510530, PR China
| | - Jie-Xian Dong
- Department of Entomology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States; Guangzhou Nabo Antibody Technology Co. Ltd, Guangzhou 510530, PR China
| | - Natalia Vasylieva
- Department of Entomology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
| | - Yong-Liang Cui
- Ministry of Agriculture, Citrus Research Institute, Southwest University, Chongqing 400712, PR China
| | - De-Bin Wan
- Department of Entomology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
| | - Xiu-De Hua
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Jing-Qian Huo
- College of Plant Protection, Agricultural University of Hebei, Baoding 071001, PR China
| | - Dong-Chen Yang
- College of Plant Protection, Agricultural University of Hebei, Baoding 071001, PR China
| | - Shirley J Gee
- Department of Entomology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
| | - Bruce D Hammock
- Department of Entomology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States.
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Li ZF, Xu MY, Zhang DH, Gao TT, Gao Z, Li H. Effects of ulinastatin combined with octreotide on blood coagulation function, inflammatory factors and amylase in patients with severe acute pancreatitis. J BIOL REG HOMEOS AG 2020; 34:2147-2151. [PMID: 33415938 DOI: 10.23812/20-362-l] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Z F Li
- Emergency Department, Weifang People's Hospital, Weifang, China
| | - M Y Xu
- Clinical Laboratory, People's Hospital of Rizhao, Rizhao, China
| | - D H Zhang
- Chemotherapy Department, the People's Hospital of Zhangqiu Area, Jinan, China
| | - T T Gao
- Department of Nephrology, The People's Hospital of Zhangqiu Area, Jinan, China
| | - Z Gao
- Department of Rehabilitation, the People's Hospital of Zhangqiu Area, Jinan, China
| | - H Li
- No 2 Department of Gynaecology, Weifang People's Hospital, Weifang, China
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15
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Zhang SW, Sun YY, Sun YM, Wang H, Li ZF, Xu ZL. Visual upconversion nanoparticle-based immunochromatographic assay for the semi-quantitative detection of sibutramine. Anal Bioanal Chem 2020; 412:8135-8144. [PMID: 32914397 DOI: 10.1007/s00216-020-02944-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 07/06/2020] [Revised: 08/17/2020] [Accepted: 09/04/2020] [Indexed: 12/26/2022]
Abstract
Immunochromatographic assay (ICA) has been used widely for the onsite monitoring of illegal additives due to its simplicity, speed, and low cost. However, a scanner is commonly required for ICA to achieve quantitative results. In this work, we developed a visual semi-quantitative ICA for sibutramine, a banned additive in diet foods, without the need for a scanner for measurement. Monoclonal antibodies specific for sibutramine were raised and conjugated with upconversion nanoparticles (UCNPs) as the luminescent tracer. ICA was developed by employing multiple test lines to achieve the semi-quantitative detection of sibutramine. Based on the optimal conditions, the cutoff levels (limit of quantitation, LOQ) of T1 line, T2 line, T3 line, and T4 line were 0.02 μg/mL, 0.15 μg/mL, 1.0 μg/mL, and 7.5 μg/mL, respectively, in buffer system. The ICA demonstrated a LOQ at 0.2 mg/kg for sibutramine in diet food samples. The assay (including pretreatment) can be finished within 30 min without the aid of other instruments, except a laser pen. No false positive or false negative results were observed. The results indicated that the proposed method was reliable, simple, and rapid for the screening of sibutramine abuse in diet food samples.
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Affiliation(s)
- Shi-Wei Zhang
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, 510642, Guangdong, China.,National Nutrition Food Testing Center, Shenzhen Academy of Metrology and Quality Inspection, Shenzhen, 518055, Guangdong, China
| | - Yan-Yan Sun
- Department of Anaesthesiology, Shenzhen University General Hospital, Shenzhen, 518055, Guangdong, China.
| | - Yuan-Ming Sun
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, 510642, Guangdong, China
| | - Hong Wang
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, 510642, Guangdong, China
| | - Zhen-Feng Li
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California Davis, Davis, CA, 95616, USA
| | - Zhen-Lin Xu
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, 510642, Guangdong, China.
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16
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Wang F, Li ZF, Yang YY, Wan DB, Vasylieva N, Zhang YQ, Cai J, Wang H, Shen YD, Xu ZL, Hammock BD. Chemiluminescent Enzyme Immunoassay and Bioluminescent Enzyme Immunoassay for Tenuazonic Acid Mycotoxin by Exploitation of Nanobody and Nanobody-Nanoluciferase Fusion. Anal Chem 2020; 92:11935-11942. [PMID: 32702970 PMCID: PMC7743996 DOI: 10.1021/acs.analchem.0c02338] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The isolation of nanobodies (Nbs) from phage display libraries is an increasingly effective approach for the generation of new biorecognition elements, which can be used to develop immunoassays. In this study, highly specific Nbs against the Alternaria mycotoxin tenuazonic acid (TeA) were isolated from an immune nanobody phage display library using a stringent biopanning strategy. The obtained Nbs were characterized by classical enzyme-linked immunosorbent assay (ELISA), and the best one Nb-3F9 was fused with nanoluciferase to prepare an advanced bifunctional fusion named nanobody-nanoluciferase (Nb-Nluc). In order to improve the sensitivity and reduce the assay time, two different kinds of luminescent strategies including chemiluminescent enzyme immunoassay (CLEIA) and bioluminescent enzyme immunoassay (BLEIA) were established, respectively, on the basis of the single Nb and the fusion protein Nb-Nluc for TeA detection. The two-step CLEIA was developed on the basis of the same nanobody as ELISA, only with simple substrate replacement from 3,3',5,5'-tetramethylbenzidine (TMB) to luminol. In contrast with CLEIA, the novel BLEIA was conducted in one-step new strategy on the basis of Nb-Nluc and bioluminescent substrate coelenterazine-h (CTZ-h). Their half maximal inhibitory concentration (IC50) values were similar to 8.6 ng/mL for CLEIA and 9.3 ng/mL for BLEIA, which was a 6-fold improvement in sensitivity compared with that of ELISA (IC50 of 54.8 ng/mL). Both of the two assays provided satisfactory recoveries ranging from 80.1%-113.5% in real samples, which showed better selectivity for TeA analogues and other common mycotoxins. These results suggested that Nbs and Nb-Nluc could be used as useful reagents for immunodetection and that the developed CLEIA/BLEIA have great potential for TeA analysis.
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Affiliation(s)
- Feng Wang
- College of Food Science, South China Agricultural University, Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, Guangzhou 510642, P. R. China
| | - Zhen-Feng Li
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
- Guangzhou Nabo Antibody Technology Co. Ltd, Guangzhou 510530, P. R. China
| | - Yuan-Yuan Yang
- College of Food Science, South China Agricultural University, Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, Guangzhou 510642, P. R. China
| | - De-Bin Wan
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
| | - Natalia Vasylieva
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
| | - Yu-Qi Zhang
- College of Food Science, South China Agricultural University, Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, Guangzhou 510642, P. R. China
| | - Jun Cai
- College of Food Science, South China Agricultural University, Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, Guangzhou 510642, P. R. China
| | - Hong Wang
- College of Food Science, South China Agricultural University, Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, Guangzhou 510642, P. R. China
| | - Yu-Dong Shen
- College of Food Science, South China Agricultural University, Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, Guangzhou 510642, P. R. China
| | - Zhen-Lin Xu
- College of Food Science, South China Agricultural University, Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, Guangzhou 510642, P. R. China
| | - Bruce D. Hammock
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
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Xing PF, Yang PF, Li ZF, Zhang L, Shen HJ, Zhang YX, Zhang YW, Liu JM. Comparison of Aspiration versus Stent Retriever Thrombectomy as the Preferred Strategy for Patients with Acute Terminal Internal Carotid Artery Occlusion: A Propensity Score Matching Analysis. AJNR Am J Neuroradiol 2020; 41:469-476. [PMID: 32054612 DOI: 10.3174/ajnr.a6414] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [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: 10/29/2019] [Accepted: 12/23/2019] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE There is no consensus on endovascular treatment for terminal ICA. The purpose of this study was to evaluate the comparative safety and efficacy of preferred aspiration thrombectomy and stent retriever thrombectomy for revascularization in patients with isolated terminal ICA occlusion. MATERIALS AND METHODS We conducted a retrospective analysis of patients with terminal ICA occlusion treated with aspiration thrombectomy or stent retriever thrombectomy in our center, from September 2013 to November 2018. To minimize the case bias, propensity score matching was performed. The primary outcomes were successful reperfusion defined by expanded TICI grades 2b-3 at the end of all endovascular procedures and puncture-to-reperfusion time. RESULTS A total of 109 consecutive patients with terminal ICA occlusion were divided into the aspiration thrombectomy group (40 patients) and the stent retriever thrombectomy group (69 patients), and 30 patients were included in each group after propensity score matching. The proportion of complete reperfusion was significantly higher in the aspiration thrombectomy group (OR 4.75 [95% CI, 1.10-1.38]; P = .002). The median puncture-to-reperfusion time in the aspiration thrombectomy group was shorter than that in the stent retriever thrombectomy group (38 versus 69 minutes; P = .001). Fewer intracerebral hemorrhage events were recorded in the aspiration thrombectomy group (OR 0.29 [95% CI, 0.09-0.90]; P = .028). No significant differences were observed for good outcomes (OR 1.92 [95% CI, 0.86-4.25]) and mortality (OR 0.84 [95% CI, 0.29-2.44]) at 90 days. CONCLUSIONS For the treatment of terminal ICA occlusion, aspiration thrombectomy was technically superior to stent retriever thrombectomy in the absence of a balloon guide catheter in achieving successful reperfusion with shorter puncture-to-reperfusion time and procedure-related adverse events.
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Affiliation(s)
- P F Xing
- From the Department of Stroke Center, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - P F Yang
- From the Department of Stroke Center, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Z F Li
- From the Department of Stroke Center, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - L Zhang
- From the Department of Stroke Center, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - H J Shen
- From the Department of Stroke Center, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Y X Zhang
- From the Department of Stroke Center, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Y W Zhang
- From the Department of Stroke Center, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - J M Liu
- From the Department of Stroke Center, Changhai Hospital, Second Military Medical University, Shanghai, China.
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18
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Fu HJ, Wang Y, Xiao ZL, Wang H, Li ZF, Shen YD, Lei HT, Sun YM, Xu ZL, Hammock B. A rapid and simple fluorescence enzyme-linked immunosorbent assay for tetrabromobisphenol A in soil samples based on a bifunctional fusion protein. Ecotoxicol Environ Saf 2020; 188:109904. [PMID: 31704326 PMCID: PMC7198468 DOI: 10.1016/j.ecoenv.2019.109904] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 09/01/2019] [Revised: 10/29/2019] [Accepted: 10/31/2019] [Indexed: 05/20/2023]
Abstract
Tetrabromobisphenol A (TBBPA) is the largest brominated flame retardant which can be released to environment and cause long-term hazard. In this work, we developed a rapid and highly sensitive fluorescence enzyme-linked immunosorbent assay (FELISA) for monitoring of TBBPA in soil samples. TBBPA specific nanobody derived from camelid was fused with alkaline phosphatase to obtain the bi-functional fusion protein, which enable the specific binding of TBBPA and the generation of detection signal simultaneously. The assay showed an IC50 of 0.23 ng g-1, limit detection of 0.05 ng g-1 and linear range from 0.1 to 0.55 ng g-1 for TBBPA in soil samples. Due to the high resistance to organic solvents of the fusion protein, a simple pre-treatment by using 40% dimethyl sulfoxide (DMSO) as extract solvent can eliminate matrix effect and obtain good recoveries (ranging from 93.4% to 112.4%) for spiked soil samples. Good relationship between the results of the proposed FELISA and that of liquid chromatography tandem mass spectrometry (LC-MS/MS) was obtained, which indicated it could be a powerful analytical tool for determination of TBBPA to monitor human and environmental exposure.
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Affiliation(s)
- Hui-Jun Fu
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou, 510642, China.
| | - Yu Wang
- Guangzhou Institute for Food Control, Guangzhou, 510410, China.
| | - Zhi-Li Xiao
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou, 510642, China.
| | - Hong Wang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou, 510642, China.
| | - Zhen-Feng Li
- Guangzhou Institute for Food Control, Guangzhou, 510410, China.
| | - Yu-Dong Shen
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou, 510642, China.
| | - Hong-Tao Lei
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou, 510642, China.
| | - Yuan-Ming Sun
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou, 510642, China.
| | - Zhen-Lin Xu
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou, 510642, China.
| | - Bruce Hammock
- Department of Entomology and UCD Comprehensive Cancer Center, University of California, Davis, CA, 95616, United States.
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19
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Li ZF, Qian MX, Zhai XW. [Research advance in correlation of Zinc-finger protein 384-related fusion genes with childhood acute lymphoblastic leukemia]. Zhonghua Er Ke Za Zhi 2020; 58:69-72. [PMID: 31905484 DOI: 10.3760/cma.j.issn.0578-1310.2020.01.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Z F Li
- Department of Hematology and Oncology, Children's Hospital of Fudan University, Shanghai 201102, China
| | - M X Qian
- Children's Hospital and Institutes of Biomedical Sciences, Fudan University, Shanghai 201102, China
| | - X W Zhai
- Department of Hematology and Oncology, Children's Hospital of Fudan University, Shanghai 201102, China
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20
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Lv ZR, Li ZF, Yang ZP, Li X, Yang Q, Li K, Li J. One-Step Reconstruction with a Novel Suspended, Modular, and 3D-Printed Total Sacral Implant Resection of Sacral Giant Cell Tumor with Preservation of Bilateral S 1-3 Nerve Roots via a Posterior-Only Approach. Orthop Surg 2019; 12:58-66. [PMID: 31854115 PMCID: PMC7031587 DOI: 10.1111/os.12582] [Citation(s) in RCA: 3] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 10/22/2019] [Accepted: 10/23/2019] [Indexed: 12/22/2022] Open
Abstract
Objective To investigate the efficacy and safety of spinopelvic reconstruction based on a novel suspended, modular, and 3D‐printed total sacral implant after total piecemeal resection of a sacral giant cell tumor (SGCT) with the preservation of bilateral S1–3 nerve roots via a posterior‐only approach. Methods Five patients who had undergone total piecemeal resection of SGCT involving upper sacral segments (S1 and S2) and the midline with the preservation of bilateral S1–3 nerve roots via a posterior‐only approach between September 2017 and July 2018 were retrospectively reviewed. A novel suspended, modular, and 3D‐printed total sacral implant had been used for reconstruction. This series included two female and three male patients, with a mean age of 42.2 years (range, 31–53 years). Surgical time, blood loss, complications, preoperative and postoperative neurological function, instrumentation failure, and local control were presented and analyzed. Results All patients underwent the operation without death or serious complications. The implant was installed on the defect, connecting the ilium and lumbar vertebrae, and fixed with a screw–rod system up to the level of L3–4 or L4–5. The mean operative time was 502 min (range, 360–640 min) and the mean operative blood loss 4400 mL (range, 3000–7000 mL). The mean follow‐up was 15 months. After the operation, pain was significantly relieved, and the patients resumed walking as early as 2 weeks later. The patients showed no neurogenic bladder dysfunction and no fecal incontinence or gait disturbance. Wound healing was poor in one patient. Patients recovered well without evidence of local recurrence. No implant failures or related clinical symptoms were detected during follow up. Satisfactory bone ingrowth and osseointegration at the bone‐implant junctions was found in follow‐up CT. Conclusion Although technically challenging, it is feasible and safe to use a suspended, modular, and 3D‐printed implant for reconstruction after total piecemeal resection with the preservation of bilateral S1–3 nerve roots in patients with SGCT. We believe that this implant can be applied to sacral reconstruction in a wide variety of diseases.
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Affiliation(s)
- Zhao-Rui Lv
- Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, China.,Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Zhen-Feng Li
- Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, China
| | - Zhi-Ping Yang
- Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, China
| | - Xin Li
- Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, China
| | - Qiang Yang
- Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, China
| | - Ka Li
- Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, China
| | - Jianmin Li
- Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, China
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Huang JX, Yao CY, Yang JY, Li ZF, He F, Tian YX, Wang H, Xu ZL, Shen YD. Design of Novel Haptens and Development of Monoclonal Antibody-Based Immunoassays for the Simultaneous Detection of Tylosin and Tilmicosin in Milk and Water Samples. Biomolecules 2019; 9:biom9120770. [PMID: 31771142 PMCID: PMC6995535 DOI: 10.3390/biom9120770] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 11/17/2019] [Accepted: 11/19/2019] [Indexed: 01/31/2023] Open
Abstract
In this work, a monoclonal antibody-based indirect competitive enzyme-linked immunosorbent assay (icELISA) was established to detect tylosin and tilmicosin in milk and water samples. A sensitive and specific monoclonal antibody was prepared by rational designed hapten, which was achieved by directly oxidizing the aldehyde group on the side chain of tylosin to the carboxyl group. Under the optimized conditions, the linear range of icELISA for tylosin and tilmicosin were 1.3 to 17.7 ng/mL and 2.0 to 47.4 ng/mL, with half-maximal inhibition concentration (IC50) values of 4.7 and 9.6 ng/mL, respectively. The cross-reactivity with other analogues of icELISA was less than 0.1%. The average recoveries of icELISA for tylosin and tilmicosin ranged from 76.4% to 109.5% in milk and water samples. Besides, the detection results of icELISA showed good correlations with HPLC-MS/MS. The proposed icELISA was satisfied for rapid and specific screening of tylosin and tilmicosin residues in milk and water samples.
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Affiliation(s)
- Jian-Xin Huang
- College of Food Science, Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, China; (J.-X.H.); (C.-Y.Y.); (J.-Y.Y.); (F.H.); (H.W.); (Z.-L.X.)
| | - Chan-Yuan Yao
- College of Food Science, Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, China; (J.-X.H.); (C.-Y.Y.); (J.-Y.Y.); (F.H.); (H.W.); (Z.-L.X.)
| | - Jin-Yi Yang
- College of Food Science, Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, China; (J.-X.H.); (C.-Y.Y.); (J.-Y.Y.); (F.H.); (H.W.); (Z.-L.X.)
| | - Zhen-Feng Li
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California Davis, Davis, CA 95616, USA;
| | - Fan He
- College of Food Science, Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, China; (J.-X.H.); (C.-Y.Y.); (J.-Y.Y.); (F.H.); (H.W.); (Z.-L.X.)
| | - Yuan-Xin Tian
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
- Correspondence: (Y.-X.T.); (Y.-D.S.); Tel.: +86-20-627-894-16 (Y.-X.T.); +86-20-852-834-48 (Y.-D.S.)
| | - Hong Wang
- College of Food Science, Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, China; (J.-X.H.); (C.-Y.Y.); (J.-Y.Y.); (F.H.); (H.W.); (Z.-L.X.)
| | - Zhen-Lin Xu
- College of Food Science, Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, China; (J.-X.H.); (C.-Y.Y.); (J.-Y.Y.); (F.H.); (H.W.); (Z.-L.X.)
| | - Yu-Dong Shen
- College of Food Science, Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, China; (J.-X.H.); (C.-Y.Y.); (J.-Y.Y.); (F.H.); (H.W.); (Z.-L.X.)
- Correspondence: (Y.-X.T.); (Y.-D.S.); Tel.: +86-20-627-894-16 (Y.-X.T.); +86-20-852-834-48 (Y.-D.S.)
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Weng CY, Li ZF, Hu SD, Luo YS, Feng XT, Zhong Q, Zhang Q, Shen J. [Evaluation of quality of life in patients with Graves orbitopathy and its influencing factors]. Zhonghua Nei Ke Za Zhi 2019; 58:577-583. [PMID: 31365979 DOI: 10.3760/cma.j.issn.0578-1426.2019.08.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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 evaluate life quality of Graves orbitopathy (GO) patients using Graves orbitopathy quality-of-life questionnaire (GO-QOL) and explore the influence factors of the quality of life of GO patients. Methods: This was a cross-sectional study conducted at The Third Affiliated Hospital of Southern Medical University including 145 newly diagnosed GO patients. All the patient answered the GO-QOL and underwent ophthalmic and endocrine assessments. The main outcome measures were the scores on GO-QOL 2 subscales: visual functioning and appearance. Based on the classification in the guideline of European Group on Graves Orbitopathy (EUGOGO), the patients were divided into two groups: mild and moderate to severe groups. Then the scales between these two groups were compared and influencing factors were analyzed. Finally, the floor and ceiling effects were assessed. Results: The GO-QOL scores for the subscales of visual functioning and appearance were 70.91±27.83 and 61.29±26.37 respectively in 145 GO patients. Visual functioning and appearance were lower in moderate to severe group (62.71±28.77 and 57.52±26.49, respectively) than in mild group (85.58±18.77 and 68.02±24.99, respectively).The GO-QOL scores for the visual functioning subscale were significantly correlated with age (P=0.002), clinical active score (P=0.011) and the degree of diplopia (P=0.00, R(2)=0.373). The GO-QOL scores for the appearance were significantly correlated with sex (P=0.05) and thyroid-stimulating hormone levels (P=0.001, R(2)=0.231). No significant ceiling or floor effects were observed for either subscale of the GO-QOL. Conclusions: With the aggravation of the disease, the quality of life of GO patients is getting worse and worse. The main influencing factors of the quality of life of GO patients include age, gender, diplopia, clinical active score and thyroid-stimulating hormone levels. Close attention needs to be paid to the quality of life of GO patients.
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Affiliation(s)
- C Y Weng
- Department of Endocrinology, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, China
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Huang HY, Zhu SL, Zhou TH, Li ZF, Liu CC, Wang H, Yan SP, Song SM, Zou SM, Zhang YM, Li N, Zhu L, Liao XZ, Shi JF, Dai M. [Natural history of colorectal cancer: a Meta-analysis on global prospective cohort studies]. Zhonghua Liu Xing Bing Xue Za Zhi 2019; 40:821-831. [PMID: 31357806 DOI: 10.3760/cma.j.issn.0254-6450.2019.07.017] [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 acknowledge the availability and rates of annual transition of outcomes during the progression and regression stages of colorectal cancer (CRC) and related diseases, by pooling global follow-up studies on the natural history of CRC. Methods: Till March, 2017, data was collected through systematic literature review over multiple databases, including PubMed, Embase, Cochrane and Chinese Biology Medicine (CBM) disc. Information regarding the characteristics, classification system of health states, related outcomes and incidence rates on CRC or high-risk adenoma for the surveillance cohorts of the studies, were extracted and summarized. Both Meta and sensitivity analyses were performed on those outcomes if they appeared in more than 3 studies, using the random effects model. Annual transition rate with 95%CI was used to estimate each of the outcomes, Quality of the studies was assessed, using the Newcastle-Ottawa Scale. Results: A total of 29 cohort studies were included, with the mean follow-up period as 5.7 years. All studies except one, focused on adenoma-carcinoma pathway and reported the outcome parameters of adenomas by different risk, and some reported the findings on different sizes (n=6) of adenomas. These cohorts were divided into three groups (normal status, with low-risk or high-risk adenoma) according to the status of baseline endoscopic pathologic findings. Their available outcome parameters, corresponding number of involved articles, aggregated sample size and pooled annual transition rates were presented. Six parameters were obtained in the normal cohorts, including those from normal to low-risk adenoma (16 articles, 58 235, 0.030: 0.024-0.037), to high-risk adenoma (17 articles, 62 089, 0.003: 0.002-0.004), to diminutive adenoma (<5 mm, 4 articles, 1 277, 0.021: 0.013-0.029), to small adenoma (6-9 mm, 4 articles, 1 277, 0.006: 0.001-0.010), to large adenoma (≥10 mm, 7 articles, 3 531, 0.002: 0.000-0.003) and to CRC (19 articles, 104 836, 0.000 3: 0.000 2-0.000 5). Three parameters were obtained in low-risk adenoma in cohorts with polypectomy findings, including recurrence (9 articles, 4 788, 0.109: 0.062-0.157) from low-risk adenoma after polypectomy to high-risk adenoma (10 articles, 5 736, 0.009: 0.004-0.013) and to CRC (12 articles, 11 347, 0.000 6: 0.000 4-0.000 8). Three parameters were obtained on high-risk adenoma from cohorts with polypectomy findings, including recurrence (12 articles, 7 030, 0.038: 0.028-0.048) from high-risk adenoma after polypectomy to low-risk adenoma (8 articles, 2 489, 0.133: 0.081-0.185) and CRC (14 articles, 14 899, 0.002: 0.001-0.003). Except for normal to low-risk adenomas, results from the sensitivity analysis for the other parameters showed stable. Of the included studies, two presented incidence rates of CRC in different clinical stages and the another two were focusing on the parameters related to serrated pathway. Conclusions: Globally, follow-up studies reported data on natural history of colorectal cancer is of paucity. Compared to the "adenoma-carcinoma" pathway, transition parameters of the serrated lesion pathway are more limited. This Meta-analysis provided convincing evidence for optimizing the strategies regarding follow-up program on the disease, using the baseline endoscopic findings from global CRC Screening Program. These results also offered strong data-related support for Chinese population- specific interventional model on colorectal cancer.
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Affiliation(s)
- H Y Huang
- Clinical Trials Center, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - S L Zhu
- Office for Cancer Control and Research, Hunan Cancer Hospital, Changsha 410006, China
| | - T H Zhou
- Teaching and Research Department, Affiliated Cancer Hospital of Xinjiang Medical University, Urumqi 830011, China
| | - Z F Li
- Medical Oncology, Health Center for Staff in Kailuan Hospital, Tangshan 063000, China
| | - C C Liu
- Office of Cancer Screening, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - H Wang
- Office of Cancer Screening, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - S P Yan
- Office for Cancer Control and Research, Hunan Cancer Hospital, Changsha 410006, China
| | - S M Song
- Teaching and Research Department, Affiliated Cancer Hospital of Xinjiang Medical University, Urumqi 830011, China
| | - S M Zou
- Department of Pathology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Y M Zhang
- Department of Endoscopy, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - N Li
- Clinical Trials Center, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - L Zhu
- Teaching and Research Department, Affiliated Cancer Hospital of Xinjiang Medical University, Urumqi 830011, China
| | - X Z Liao
- Office for Cancer Control and Research, Hunan Cancer Hospital, Changsha 410006, China
| | - J F Shi
- Office of Cancer Screening, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - M Dai
- Office of Cancer Screening, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
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Li ZF, Zhao W, Qi TF, Gao C, Gu Q, Zhao JS, Koh TS. A simple B 1 correction method for dynamic contrast-enhanced MRI. ACTA ACUST UNITED AC 2018; 63:16NT01. [DOI: 10.1088/1361-6560/aad519] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [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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Li ZF, Yi SJ, Wang WH, He XS, Liu QH. [The efficacy comparation of adenoidectomy with acupuncture and tympanonstomy in children secretory otitis media]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 32:383-385. [PMID: 29798300 DOI: 10.13201/j.issn.1001-1781.2018.05.016] [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] [Received: 11/06/2017] [Indexed: 11/12/2022]
Abstract
Objective:This study aims to the comparative study of AT+A (adenoidectomy with acupuncture) and AT+T (adenoidectomy with tympanonstomy tube) to monitor and compare the therapeutic effect and prognosis of secretory otitis media in children. The study make a summary and give the clinical suggestions as well.Method:We collected and analyzed 280 outpatients of children secretory otitis media from March 2015 to March 2016.Among them,172 cases took the adenoidectomy with acupuncture and 108 cases took the adenoidectomy with tympanonstomy tube. This research used the therapeutic effect indicators,middle ear effusion time and one year follow-up to evaluate the pros and cons of two surgery methods in different areas.Result:The patients of both groups had relatively good therapeutic effect which promoted with time. There were no significant difference between AT+A and AT+T in tympanic membrane. While AT+T group acted better than AT+A group in pure tone average and tympanum figure. The middle ear effusion time of AT+T group was significantly shorter than AT+A group. In one year follow-up, there were no difference in hearing loss between two groups.But AT+T group performed better in recurrence rate, infection rate and total rate.Conclusion:Since the adenoidectomy with tympanonstomy tube method has a lot of advantages over adenoidectomy with acupuncture,it's better to use AT+T in severechildren secretory otitis media when situation is available.
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Affiliation(s)
- Z F Li
- Department of Otolaryngology Head and Neck Surgery, the Affiliated Hospital of Guilin Medical College, Guilin, 541001, China
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Wang G, Xu WG, Li F, Su K, Li N, Lü ZY, Feng XS, Wei LP, Chen HD, Chen YH, Guo LW, Cui H, Yang WJ, Li ZF, Ren JS, Wu SL, Shi JF, Dai M, He J. [Relationship between inflammatory markers and the risk of colorectal cancer in Kailuan male cohort]. Zhonghua Yi Xue Za Zhi 2017; 97:3158-3161. [PMID: 29081162 DOI: 10.3760/cma.j.issn.0376-2491.2017.40.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Objective: To investigate whether elevated levels of high sensitivity C-Reactive Protein (hsCRP) and neutrophil (NE) at baseline are associated with an increased risk of colorectal cancer in Kailuan male cohort. Methods: Since May 2006, males from Kailuan cohort were included in this study. Information on demographics, medical history, anthropometry, hsCRP and NE were collectedat baseline for all subjects. Multivariable Cox proportional hazards regression models were used to calculate hazard ratios (HR) of association between baseline hsCRP and NE and colorectal cancer risk. Results: By December 31, 2015, a total of 73 869 participants were enrolled in this study. During the follow-up, 336 incident colorectal cancer cases were identified. All participants were divided into three groups according to the level of hsCRP (<1 mg/L, 1-3 mg/L and >3 mg/L). The cumulative incidence of colorectal cancer were 456/10(5,) 510/10(5) and 746/10(5) in these 3 groups, respectively (χ(2)=10.79, P=0.005). Compared with participants with lower hsCRP levels (<1 mg/L), individuals with the highest hsCRP (>3 mg/L) levels had significant increased risks of colorectal cancer (HR=1.38, 95%CI: 1.05-1.81, P=0.020)after adjusting for age, gender, smoking, drinking, BMI, diabetes and income. Furthermore, subjects were divided into two groups according to the level of NE (≤ 4.08×10(9)/L and > 4.08×10(9)/L). Multivariable Cox proportional hazards regression models indicated that there is no statistical significance of association between NE and colorectal cancer. Conclusions: Elevated levels of hsCRP at baseline might increase the risk of colorectal cancer in males.
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Affiliation(s)
- G Wang
- Department of Oncology, Kailuan General Hospital, Tangshan 063000, China
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He ZX, Wang S, Li ZF, Zhu L, Leng JH, Lang JH. [Risk factors of endometriosis associated ovarian carcinoma in women aged 45 years and older]. Zhonghua Fu Chan Ke Za Zhi 2017; 52:314-319. [PMID: 28545269 DOI: 10.3760/cma.j.issn.0529-567x.2017.05.005] [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
Obiective: To explore the risk factors of endometriosis-associated ovarian cancer (EAOC) in women with ovarian endometriosis aged 45 years and older in China. Methods: The medical records of total 1 038 women aged 45 years and older with a surgicopathological diagnosis of ovarian endometriosis treated at Peking Union Medical College Hospital from December 1994 to December 2014 were reviewed. Histology evaluation determined ovarian endometriosis with (n=30) or without (n=1 008) ovarian cancer. Results: (1) There were 30 (2.9%, 30/1 018) cases confirmed as having EAOC. Clear cell carcinoma (63.3%, 17/30) and endometrioid adenocarcinoma (23.3%, 7/30) were commonly observed subtypes and 70.0% of EAOC patients were at stage Ⅰ. (2) Compared women with ovarian endometriosis in the same age group, patients with EAOC were older (50.8 vs 48.5 years, P=0.002). There were more in postmenopausal status at diagnosis of EAOC (P<0.01). There were more found with a mass ≥8 cm (P<0.01). Women with EAOC had higher prevalence of coexisting endometrial disorders (P=0.003). No differences were found in preoperative CA(125) value and infertile or nulliparous women (P>0.05). Conclusions: For women with ovarian endometriosis aged 45 years and older, the subgroup of patients characterized by postmenopausal status and ovarian endometrioma (≥8 cm) have a higher risk of EAOC. Active intervention or intensive follow-up should be considered for this population group, especially for those concurrent with endometrial disorders.
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Affiliation(s)
- Z X He
- Department of Obstetrics and Gynecology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
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Li ZF, Shao XH, Zhang LQ, Yang ZP, Li X, Yang Q, Li JM. Transnasal Endoscopic Biopsy Approach to Atlas Tumor with X-ray Assisted and Related Radiographic Measure. Orthop Surg 2017; 8:179-85. [PMID: 27384726 DOI: 10.1111/os.12232] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2015] [Accepted: 02/16/2016] [Indexed: 12/01/2022] Open
Abstract
OBJECTIVE To develop an endoscopic transnasal approach to atlas tumors and study its practicability. METHODS This article comprises two components: an illustrative case report and observational data on 50 volunteers. As to the case report, a 34 year old man presented with occipital pain for more than 3 months and underwent systematic investigation in Qilu Hospital of Shandong University. CT and MRI scans showed bony destruction in the craniovertebral junction (CVJ) suggestive of tumor. Via an endoscopic transnasal approach to the suspected atlas tumor through the inferior nasal meatus, a Gallini biopsy needle was used to obtain tissue for examination. The procedure was performed endoscopically with double orientation X-ray guidance and coaxial technology after establishing the shortest distance for the biopsy track and range of target tissue and was assisted by manual palpation. As to the observational data, 50 volunteers underwent atlas-related morphometric image measurement using gemstone CT equipment. Biopsy track angles, range for biopsy of the atlas and biopsy track distances were measured by a blinded operator on CT images. RESULTS CASE REPORT pathological examination of the biopsy resulted in diagnosis of a chordoma. There were no complications such as bleeding, infection or spinal cord injury. One month later, the patient underwent tumor resection and reconstruction in other hospital and the diagnosis of chordoma was confirmed by pathological examination of the resected specimen. Observational data: measurements obtained from CT scans of the 50 volunteers were as follows. Biopsy track angles: mean leaning inside angle 3.53° ± 0.39° and mean posterior slope angle 13.05° ± 1.39°. Range for atlas biopsy: transverse diameter 11.84 ± 1.24 mm and longitudinal diameter 9.67 ± 0.90 mm. Biopsy track distances: from atlas to nostril, and to anterior and posterior edges of the inferior turbinate mucosa were 94.52 ± 5.03 mm, 78.21 ± 4.63 mm, and 33.51 ± 3.13 mm, respectively. CONCLUSIONS An endoscopic transnasal approach enables biopsy and diagnosis of tumors in the anterior arch of the atlas. Relevant measurements were obtained by assessing CT scans of 50 volunteers to assist operators to determine the effective and safe range for transnasal atlas biopsy.
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Affiliation(s)
- Zhen-Feng Li
- Department of Orthopaedics, Qilu Hospital, Shandong University, Jinan, China
| | - Xian-Hao Shao
- Department of Orthopaedics, Qilu Hospital, Shandong University, Jinan, China
| | - Li-Qiang Zhang
- Department of Orthopaedics, Qilu Hospital, Shandong University, Jinan, China
| | - Zhi-Ping Yang
- Department of Orthopaedics, Qilu Hospital, Shandong University, Jinan, China
| | - Xin Li
- Department of Orthopaedics, Qilu Hospital, Shandong University, Jinan, China
| | - Qiang Yang
- Department of Orthopaedics, Qilu Hospital, Shandong University, Jinan, China
| | - Jian-Min Li
- Department of Orthopaedics, Qilu Hospital, Shandong University, Jinan, China
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Tian YS, Guan J, Li ZF. [Experimental study of autologous fibroblast cell transplantation in the treatment of vocal fold scar]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2016; 30:1778-1781. [PMID: 29798481 DOI: 10.13201/j.issn.1001-1781.2016.22.008] [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] [Received: 06/14/2016] [Indexed: 11/12/2022]
Abstract
Objective:To study the change characteristics of vocal cords scar after the implantation of autologous fibroblast cells into the vocal cords. Method:Forty New Zealand rabbits were used for the production of vocal fold scar model by creating a unilateral vocal fold wounds, we take the skin tissues of each rabbits and cultured them via enzyme digestion method to obtain autologous fibroblast cells. The models were separated into the experimental group and the control group, the third generation fibroblast cells with CM DIL labeled were then injected into the surrounding area of the vocal fold scar in the experimental group, the survival situation of the injected cells were observed by fluorescence microscopy after 1 week, histological examination was performed after 1 months to observe the morphological changes of vocal fold scar tissues, RT-PCR method was used to measure the expression variation of typeⅠcollagen and type Ⅲ collagen in the vocal cords and the normal vocal cords, respectively. Result:After 1 week of autologous fibroblast transplantation into the vocal folds, the fluorescence labeled cells were observed.1 month after transplantation, the collagen protein in the vocal fold scar tissues was similar to that in the normal vocal folds,the expression of typeⅠcollagen and type Ⅲ collagen in vocal fold scars is similar to those in the normal vocal folds. Conclusion:Autologous fibroblast migration into the vocal cords can survive well inside the vocal cords, and the vocal scar can be recovered to normal vocal cord structure after transplantation of autologous fibroblast cells.
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Affiliation(s)
- Y S Tian
- Department of Otolaryngology,Aerospace Center Hospital,Beijing,100049,China
| | - J Guan
- Department of Otorhinolaryngology Head and Neck Surgery,General Hospital of Chinese People's Liberation Army
| | - Z F Li
- Department of Otolaryngology,Aerospace Center Hospital,Beijing,100049,China
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Li X, Wang XK, Chen B, Pu YS, Li ZF, Nie P, Su K. Computational hemodynamics of portal vein hypertension in hepatic cirrhosis patients. Biomed Mater Eng 2016; 26 Suppl 1:S233-43. [PMID: 26406008 DOI: 10.3233/bme-151310] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Portal vein hypertension generally occurs in liver diseases like hepatic cirrhosis. It causes hemodynamic changes that are closely related to liver disease. At advanced stages of hepatic cirrhosis, portal vein hypertension leads to the atrophy of the right lobe of the liver and the hypertrophy of the left lobe through a process that has not yet been fully explained. Based on the hemodynamic changes that are known to occur, we hypothesize that liver volume is related to the distribution of blood flowing from the splenic vein (SV) that carries hepatotrophic factors from the spleen and pancreas. We studied blood flow in the portal vein system to validate this hypothesis through in vitro experimentation and a computational fluid dynamics (CFD) analysis involving both simplified and patient-specific models based on four healthy subjects and two patients with liver cirrhosis. The results confirmed the hypothesis that right-lobe atrophy is significantly influenced by the distribution of blood from the SV. Moreover, the patients with liver cirrhosis had a significantly larger mass fraction of spleen-derived blood in the left portal vein branch (LPV) than healthy subjects, a result consistent with right-lobe atrophy and left-lobe hypertrophy.
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Affiliation(s)
- X Li
- State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an City, Shaanxi Province, P.R. China
| | - X K Wang
- State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an City, Shaanxi Province, P.R. China
| | - B Chen
- State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an City, Shaanxi Province, P.R. China
| | - Y S Pu
- Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an City, Shaanxi Province, P.R. China
| | - Z F Li
- Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an City, Shaanxi Province, P.R. China
| | - P Nie
- Department of Radiology, Huaihe Hospital Affiliated to Henan University, Kaifeng City, Henan Province, P.R. China
| | - K Su
- Department of Radiology, Huaihe Hospital Affiliated to Henan University, Kaifeng City, Henan Province, P.R. China
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Liu J, Huang YL, Song L, Li CH, Zhao HL, Wang YM, An SS, Li ZF, Chen SH, Wang AX, Wu SL. [Association between long term systolic blood pressure variability index and cognitive function in middle-aged and elderly people]. Zhonghua Xin Xue Guan Bing Za Zhi 2016; 44:548-54. [PMID: 27346271 DOI: 10.3760/cma.j.issn.0253-3758.2016.06.017] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To investigate the association between different long term systolic blood pressure variability (SBPV) and cognitive function in middle-aged and elderly people. METHODS A total of 101 510 employees from the Tangshan Kailuan Group participated in the 2006-2007 annual physical examination, 5 440 cases were selected by simple randomly sampling method. After excluding participants who did not underwent 2012-2013 examination and without complete blood pressure and mini-mental state examination (MMSE) score, 3 002 participants (1 627 males, (50.86±9.93) years old) with integrated data were included into the study. The long term SBPV was calculated by standard deviation(SD), maximum-minimum difference(MMD), average real variability (ARV) of mean systolic blood pressure measured in 2006-2007, 2008-2009, 2010-2011 and 2012-2013. Participants were grouped by the quartile of the different SBPV index. Multiple linear regressions analysis was used to analyze the correlation between the long term SBPV and cognitive function status. RESULTS (1) The score of MMSE was 28.03±2.65. (2) The observation population was divided into four groups according to quartiles of different SBPV, respectively. The MMSE scores of SD<5.53 mmHg (1 mmHg=0.133 kPa)group, SD 5.53-8.90 mmHg group, SD 8.91-12.79 mmHg group and SD>12.79 mmHg group were 28.21±2.18, 28.26±3.09, 28.10±2.40 and 27.56±2.79, respectively(P<0.05). The MMSE scores of MMD<12.00 mmHg group, MMD 12.00-20.00 mmHg group, MMD 20.01-30.00 mmHg group and MMD>30.00 mmHg were 28.27±2.17, 28.25±3.09, 27.99±2.42 and 27.49±2.81, respectively(P<0.05). The MMSE scores of ARV<6.67 mmHg group, ARV 6.67-10.22 mmHg group, ARV 10.23-15.56 mmHg group and ARV>15.56 mmHg group were 28.27±2.20、28.28±3.20、28.00±2.42、27.57±2.65, respectively(P<0.05). (3) Adjusted for age, gender, baseline systolic blood pressure, body weight index, total cholesterol, fasting blood glucose, triglyceride, C reactive protein, smoke, drink, physical activity , the step-wise regressions analysis showed that SD(B=-0.129, P<0.05), MMD(B=-0.131, P<0.05), ARV(B=-0.125, P<0.05) had significant negative linear relationship with the MMSE score in the objects not taking the anti-hypertension drugs, and SD(B=-0.329, P<0.05), MMD(B=-0.314, P<0.05), but not ARV(B=-0.233, P>0.05), had significant negative linear relationship with the MMSE score in the objects taking the anti-hypertension drugs. CONCLUSION The long term SBPV indexes (SD, MMD, ARV ) are negatively correlated with the MMSE score in middle-aged and elderly people not taking the anti-hypertension drugs, and SD, MMD are negatively correlated with the MMSE score in people taking the anti-hypertension drugs. Clinical Trail Registry: Chinese Clinical Trail Registry, ChiCTRTNC-11001489.
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Affiliation(s)
- J Liu
- Department of Cardiology, Hospital Affiliated to North China University of Science and Technology, Tangshan 063000, China
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Zheng XM, Li ZF, Wu YT, Zhao XH, Zhao HY, Jin C, Liu HM, Chen SH, An SS, Wang Y, Wu SL. [Influencing factors of orthostatism brachial-ankle pulse wave velocity and ankle brachial index in the elderly]. Zhonghua Xin Xue Guan Bing Za Zhi 2016; 44:161-9. [PMID: 26926511 DOI: 10.3760/cma.j.issn.0253-3758.2016.02.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To investigate the distribution and influencing factors of orthostatism brachial-ankle pulse wave velocity(baPWV) and ankle brachial index(ABI) in the elderly. METHODS Participants were selected with random sampling from ≥60 years old retired workers, who underwent 2010 to 2011 health check-up in the Tangshan Kailuan Hospital, Kailuan Linxi Hospital, Kailuan Zhaogezhuang Hospital. Multivariate linear regression analysis was used to analyze the influencing factors of orthostatism and supine baPWV and ABI in the elderly. RESULTS (1) A total of 2 464 participants were included, and 1 601 participants (1 065 males(66.5%) and (67.5±6.1) years old) with integral data were analyzed. Orthostatism baPWV was (3 885.4±1 503.5)cm/s and Supine baPWV was (1 761.2±371.4)cm/s.Orthostatism ABI was 1.54±0.21 and supine ABI was 1.10±0.12. Orthostatism baPWV increased with increasing age, while orthostatism ABI decreased with aging(trend test, both P<0.01)in <65, 65-69, 70-74, and ≥75 years old participants.(2) Multiple linear regression analysis showed that the age(β=0.19, P<0.01), lower limbs orthostatism systolic blood pressure(β=0.18, P<0.01), lower limbs supine systolic blood pressure (β=0.14, P<0.01), orthostatism heart rate (β=0.30, P<0.01), supine heart rate (β=0.23, P<0.01), body mass index (β=-0.18, P<0.01) were associated with orthostatism baPWV, and female(β=-0.055, P=0.01), upper limb orthostatism systolic blood pressure (β=-0.834, P<0.01), lower limbs orthostatism systolic blood pressure (β=0.708, P<0.01), lower limbs supine systolic blood pressure (β=0.099, P<0.01) and fasting blood glucose(β=-0.085, P<0.01) were associated with orthostatism ABI. CONCLUSIONS Orthostatism baPWV and ABI were significantly higher than those of supine's. Age, lower limbs orthostatism and supine systolic blood pressure, orthostatism and supine heart rate, body mass index were associated with orthostatism baPWV. Female, upper limb orthostatism systolic blood pressure, lower limbs orthostatism, supine systolic blood pressure and fasting blood glucose were associated with orthostatism ABI in the elderly.
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Affiliation(s)
- X M Zheng
- Department of Cardiology, Kailuan Hospital, North China University of Science and Technology, Tangshan 063000, China
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Xie DW, Wang XN, Fu LS, Sun J, Zheng W, Li ZF. Identification of the trehalose-6-phosphate synthase gene family in winter wheat and expression analysis under conditions of freezing stress. J Genet 2015; 94:55-65. [PMID: 25846877 DOI: 10.1007/s12041-015-0495-z] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [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: 10/23/2022]
Abstract
Trehalose plays an important role in metabolic regulation and abiotic stress tolerance in plants. Trehalose contents are potentially modulated by trehalose-6-phosphate synthase (TPS), which is a key enzyme in the trehalose biosynthetic pathway. Using available wheat expressed sequence tag sequence information from NCBI and two wheat genome databases, we identified 12 wheat TPS genes and performed a comprehensive study on their structural, evolutionary and functional properties. The estimated divergence time of wheat TPS gene pairs and wheat-rice orthologues suggested that wheat and rice have a common ancestor. The number of TPS genes in the wheat genome was estimated to be at least 12, which is close to the number found in rice, Arabidopsis and soybean. Moreover, it has been reported earlier in other plants that TPS genes respond to abiotic stress, however, our study mainly analysed the TPS gene family under freezing conditions in winter wheat, and determined that most of the TPS gene expression in winter wheat was induced by freezing conditions, which further suggested that wheat TPS genes were involved in winter wheat freeze-resistance signal transduction pathways. Taken together, the current study represents the first comprehensive study of TPS genes in winter wheat and provides a foundation for future functional studies of this important gene family in Triticeae.
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Affiliation(s)
- D W Xie
- Agricultural College, Northeast Agricultural University, Harbin 150030, Heilongjiang Province, People's Republic of China.
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Dong JX, Xu C, Wang H, Xiao ZL, Gee S, Li ZF, Wang F, Wu WJ, Shen YD, Yang JY, Sun YM, Hammock BD. Enhanced sensitive immunoassay: noncompetitive phage anti-immune complex assay for the determination of malachite green and leucomalachite green. J Agric Food Chem 2014; 62:8752-8. [PMID: 25077381 PMCID: PMC4150606 DOI: 10.1021/jf5019824] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
To develop a more sensitive immunoassay for malachite green (MG) and leucomalachite green (LMG), we identified the immunocomplex binding phage-borne peptides for use in the noncompetitive phage anti-immunocomplex assay (PHAIA). An anti-LMG monoclonal antibody (mAb) was used to select immunocomplex binding peptides from a circular random eight-amino-acid phage-displayed library. After three rounds of panning-elution, five peptides that bound the LMG-mAb immunocomplex were obtained. One of the phage-borne peptide clones that resulted in an assay with the highest sensitivity was chosen for further research. The concentration of LMG producing 50% of the saturated signal and the limit of detection of the assay were 7.02 and 0.55 ng/mL, respectively, with a linear range of 1.35 to 21.56 ng/mL. The PHAIA based on the same antibody was 16 times more sensitive compared to the competitive immunoassay. PHAIA was used to analyze LMG, MG, and two mixtures of spiked fish samples, with validation by high-performance liquid chromatography (HPLC) with fluorescence detector. Results showed a good correlation (R(2)LMG = 0.9841; R(2)MG = 0.993; R(2)Mixture = 0.9903) between the data of PHAIA and HPLC, thus the assay was an efficient method for monitoring food safety.
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Affiliation(s)
- Jie-Xian Dong
- Guangdong
Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, China
- Department
of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
| | - Chao Xu
- Guangdong
Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, China
| | - Hong Wang
- Guangdong
Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, China
- E-mail: (H.W.). Tel.: (+86)-020-8528-3448
| | - Zhi-Li Xiao
- Guangdong
Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, China
| | - Shirley
J. Gee
- Department
of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
| | - Zhen-Feng Li
- Guangdong
Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, China
| | - Feng Wang
- Guangdong
Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, China
| | - Wei-Jian Wu
- Guangdong
Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, China
| | - Yu-Dong Shen
- Guangdong
Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, China
| | - Jin-Yi Yang
- Guangdong
Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, China
| | - Yuan-Ming Sun
- Guangdong
Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, China
- E-mail: (Y.-M.S.)
| | - Bruce D. Hammock
- Department
of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
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Zhao LY, Zhang J, Guo B, Yang J, Han J, Zhao XG, Wang XF, Liu LY, Li ZF, Song TS, Huang C. MECP2 promotes cell proliferation by activating ERK1/2 and inhibiting p38 activity in human hepatocellular carcinoma HEPG2 cells. Cell Mol Biol (Noisy-le-grand) 2013; Suppl 59:OL1876-OL1881. [PMID: 24199952] [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] [Received: 09/25/2013] [Accepted: 10/16/2013] [Indexed: 06/02/2023]
Abstract
Hepatocellular carcinoma (HCC) is the third leading cause of cancer-related death worldwide and currently represents the leading cause of death amongst cirrhotic patients, but the mechanisms remain unknown. In this experiment, we investigated the expression of Methyl CpG-binding protein 2 (MeCP2) in HCC, the effect of MeCP2 on the proliferation of human HCC HepG2 cells, and the activation of mitogen-activated protein kinases (MAPKs) signaling pathways. The results showed that MeCP2 expression levels was higher in human HCC tissue than normal hepatocellular tissue, and MeCP2 siRNA reduced the proliferation of HCC HepG2 cells by decreasing cell activity and cell division in vitro. After MeCP2 siRNA treatment, the proportion of G1/G0 phase cells increased, but the proportion of S and G2/M phase cells decreased, indicative of G1/G0 cell cycle arrest. Furthermore, the proportions of early and late apoptosis in HCC HepG2 cells were enhanced after MeCP2 siRNA treatment. It was also found that activation of extracellular signal-regulated protein kinase (ERK) and p38 signaling pathways were involved in the proliferation of HepG2 cells. After MeCP2 siRNA treatment, p-ERK1/2 levels decreased, but p-p38 levels increased. Our findings demonstrated that MeCP2 promoted the proliferation of human HCC HepG2 cells with activation of ERK1/2 signaling pathways, suggesting a novel mechanism for pharmacological study of treatment for human HCC.
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Affiliation(s)
- L Y Zhao
- Xi'an Jiaotong University College of Medicine Department of Genetics and Molecular Biology, Environment and Genes Related to Diseases Key Laboratory of Education Ministry Shaanxi China
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Li ZF, Li JM, Yan J, Yang ZP, Li X, Yang Q. Prevention of contamination by biopsy needle track contamination using a novel adriamycin-loaded gelatin sponge. World J Surg Oncol 2013; 11:169. [PMID: 23889905 PMCID: PMC3733771 DOI: 10.1186/1477-7819-11-169] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2012] [Accepted: 07/07/2013] [Indexed: 01/19/2023] Open
Abstract
Background The gold standard of tumor diagnosis is histological examination of a biopsy; however, there is concern that tumor cell dissemination along the needle track during percutaneous biopsy can cause local tumor relapse. We aimed to evaluate the value of an adriamycin (ADM)-loaded gelatin sponge in preventing tumor cell contamination along the biopsy needle track. Methods Data were obtained from 40 patients who were diagnosed by core needle biopsy as having osteosarcoma and who were followed up at our hospital between 2008 and 2011. Of the 40 patients, 20 had the needle biopsy tracks filled with ADM-loaded absorbable gelatin sponge immediately after the biopsy specimen was obtained, while the other 20 did not. All 40 patients underwent limb-salvage surgery, and specimens were obtained from the biopsy track for histopathologic examination of multiple sections. Results On histological examination, there was less tumor cell contamination along the biopsy tracks in the ADM group. Conclusion Use of ADM-loaded absorbable gelatin sponge may prevent tumor cell contamination of a biopsy track, and reduce the possibility of consequent tumor relapse.
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Affiliation(s)
- Zhen-Feng Li
- Department of Orthopaedics, Qilu Hospital of Shandong University, 107 Wenhuaxilu, Jinan, Shandong Province 250012, China
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Abstract
This study was designed to observe the clinical outcome of anterior versus posterior instrumentation in the treatment of Pyogenic vertebral osteomyelitis of the lumbar spine. Twenty-three patients underwent either anterior (anterior fixation group) or posterior fixation (posterior fixation group) combined with a single-stage anterior radical debridement and had an average follow-up of 38 months. Clinical evaluation was performed using the Oswestry Disability Index and visual analog scale. Serial tests of the erythrocyte sedimentation rate and C-reactive protein levels were used to monitor for infection recurrence. Radiography was performed pre- and postoperatively to assess the deformity correction and for bony fusion. Serial erythrocyte sedimentation rate and C-reactive protein levels reflect the active state of infection and can guide postoperative treatment. Patients in the anterior fixation group showed significantly better results on the Oswestry Disability Index than those in the posterior fixation group 2 years postoperatively. The visual analog scale values demonstrated a significant difference between the 2 groups at 1 and 2 years postoperatively, with pain significantly improved in the anterior fixation group. Radiological results showed no significant difference in fusion time, deformity correction, and cage subsidence. Both anterior and posterior fixation had satisfactory outcomes and were reliable and safe for the treatment of Pyogenic vertebral osteomyelitis of the lumbar spine. Patients with anterior fixation may achieve better postoperative results, such as better well being and less pain.
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Affiliation(s)
- Meng Si
- Department of Orthopaedics, Qilu Hospital of Shandong University, Jinan, China
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Zhao YR, Zhao ZG, Ma J, Huang H, Liu C, Zhong YL, Cui J, Li ZF, Ren JL, Wu HF, Hu GM. Differential expression of Ki67 and CDX2 proteins in intestinal metaplasia among gastric mucosa appearing as type C, D, or E pit pattern. Shijie Huaren Xiaohua Zazhi 2012; 20:3310-3316. [DOI: 10.11569/wcjd.v20.i34.3310] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To detect the expression of Ki67 and CDX2 in intestinal metaplasia (IM) among gastric mucosa appearing as type C, D or E pit pattern, and to assess the correlation between the degree of IM and the morphology of gastric pits.
METHODS: Immunohistochemistry was used to examine the expression of Ki67 and CDX2 proteins in 452 cases of gastric mucosal lesions with different pit patterns. The degree of IM was evaluated by hematoxylin and eosin staining.
RESULTS: The positive rates of Ki67 in non-atrophic gastritis (NAG) appearing as type B pit pattern (BG), atrophic gastritis (AG) with IM appearing as type C pit pattern (CIM), AG with IM appearing as type D pit pattern (DIM), AG with IM appearing as type E pit pattern (EIM), low intraepithelial neoplasia (LIN), and gastric antrum adenocarcinoma (GAAC) were 16.2%, 40.5%, 44.0%, 64.3%, 71.4%, and 87.1%, respectively. The positive rate of Ki67 protein in EIM was significantly different from those in CIM and DIM (P = 0.002, 0.008), but there was no difference between CIM and DIM. The positive rates of CDX2 protein were 21.6%, 75.0%, 78.6%, 81.0%, 80.4%, and 84.3% in the above groups, respectively. The positive rate of CDX2 protein in EIM was significantly different from that in BG (P = 0.000), but not different from those in CIM and DIM. The degree of IM was significantly higher in EIM than in DIM and CIM (P = 0.000).
CONCLUSION: CDX2 may have no relationship with micromorphology of IM in gastric mucosa. The expression of Ki67 protein and the degree of IM in EIM were higher than those in CIM and DIM.
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Chen LP, Li ZF, Ping M, Li R, Liu J, Xie XH, Song XJ, Guo L. Regulation of Olig2 during astroglial differentiation in the subventricular zone of a cuprizone-induced demyelination mouse model. Neuroscience 2012; 221:96-107. [PMID: 22771621 DOI: 10.1016/j.neuroscience.2012.06.063] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2012] [Revised: 05/18/2012] [Accepted: 06/23/2012] [Indexed: 10/28/2022]
Abstract
The mammalian subventricular zone (SVZ) is the largest germinative zone of the adult brain. Progenitor cells generated from the SVZ play important roles during the remyelination process. To determine the functional role of Olig2 in regulating astroglial differentiation in the mouse SVZ, we used the cuprizone mouse model to investigate demyelination. We found that cuprizone administration significantly enhanced the expression of Olig2 and increased astroglial differentiation in the SVZ, as compared with control. Moreover, cytoplasmic translocation of Olig2 occurred after demyelination. In vitro studies further revealed that supplementation of culture media with growth factors enhanced the oligodendroglial differentiation of oligodendrocyte progenitor cells (OPCs), whereas serum alone promoted astroglial differentiation and cytoplasmic translocation of Olig2. Additionally, the expression levels of bone morphogenetic proteins 2 and 4 (BMP2 and BMP4) and inhibitor of DNA binding 2 and 4 (Id2 and Id4) were greatly elevated during astroglial differentiation. BMP inhibition by noggin suppressed the astroglial differentiation of OPCs. Our results indicate that Olig2 may serve as a key regulator during the directional differentiation of progenitor cells after demyelination. The BMP signaling pathway may contribute to the cytoplasmic translocation and altered expression of Olig2 during the remyelination process. These findings provide a better understanding of the mechanisms involved in remyelination.
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Affiliation(s)
- L P Chen
- Department of Neurology, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, People's Republic of China
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Xu ZL, Dong JX, Wang H, Li ZF, Beier RC, Jiang YM, Lei HT, Shen YD, Yang JY, Sun YM. Production and characterization of a single-chain variable fragment linked alkaline phosphatase fusion protein for detection of O,O-diethyl organophosphorus pesticides in a one-step enzyme-linked immunosorbent assay. J Agric Food Chem 2012; 60:5076-83. [PMID: 22533788 DOI: 10.1021/jf300570q] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
A single-chain variable fragment (scFv) linked alkaline phosphatase (AP) fusion protein for detection of O,O-diethyl organophosphorus pesticides (O,O-diethyl OPs) was produced and characterized. The scFv gene was prepared by cloning V(L) and V(H) genes from hybridoma cells secreting monoclonal antibody with broad specificity for O,O-diethyl OPs. The amplified V(L) and V(H) regions were assembled using a linker (Gly(4)Ser)(3) by means of splicing overlap extension polymerase chain reaction to obtain the scFv gene, which was cloned into the expression vector pLIP6/GN containing an AP gene to produce the scFv-AP fusion protein in Escherichia coli strain BL21. The protein was purified by antigen-conjugated immunoaffinity chromatography and characterized by sodium dodecyl sulfate-polyacrylamide gel electrophoresis, Western blotting, and competitive direct enzyme-linked immunosorbent assay (cdELISA). The fusion protein is bifunctional, retaining both antigen binding specificity and AP enzymatic activity. Analysis of spiked and blind river water and Chinese cabbage samples demonstrated that the fusion protein based cdELISA(FP) exhibited good sensitivity and reproducibility.
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Affiliation(s)
- Zhen-Lin Xu
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University , Guangzhou 510642, China
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Xie YR, Liu SL, Liu X, Luo ZB, Zhu B, Li ZF, Li LJ, He Y, Jiang L, Li H, Ruan B. Intestinal microbiota and innate immunity-related gene alteration in cirrhotic rats with liver transplantation. Transplant Proc 2012; 43:3973-9. [PMID: 22172882 DOI: 10.1016/j.transproceed.2011.08.113] [Citation(s) in RCA: 20] [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] [Received: 03/01/2011] [Revised: 06/17/2011] [Accepted: 08/29/2011] [Indexed: 02/07/2023]
Abstract
BACKGROUND The present study investigated the alteration of intestinal microbiota, innate immunity-related genes, and bacterial translocation in rats with cirrhosis and liver transplantation. METHODS Specific pathogen-free Sprague-Dawley rats were randomized into 4 groups: (1) normal controls (N); (2) liver cirrhosis (LC); (3) normal control groups with liver transplantation (LTN); and (4) liver cirrhosis with liver transplantation (LTC). We examined plasma endotoxin, bacterial tacslocation, denaturing gradient gel electrophoresis (DGGE) profile of intestinal mucosa-associated bacteria, abundance of key bacterial populations, and expression of innate immunity-related gene. RESULTS The LTC and LC group, showed higher endotoxin levels (1.08±0.73 EU/mL and 0.74±0.70 EU/mL, respectively) than the N group (0.27±0.13 EU/mL; P<.05). the incidence of bacterial translocation (BT) to liver and mesenteric lymph nodes (MLN), and the number of total bacteria were increased significantly in the LTC and LC groups compared with the N group (P<.05). The counts of Lactobacilli and Bacteroides were lower, whereas Enterobacteria were higher in the LC than the N group (P<.05). Mucins (MUC2, MUC3) and Toll-like receptors (TLR2, TLR4) messenger RNA (mRNA) expression were significantly higher in the LC and LTC groups than the N group (P<.05). The marked difference between the groups in the overall structure of the bacterial community was also generated by DGGE profiles. CONCLUSION Liver cirrhosis disturbs intestinal microbiota and innate immunity-related genes, which contributes to endotoxemia and bacterial translocation. These had not completely recovered in cirrhotic rats until 1 month after orthotopic liver transplantation.
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Affiliation(s)
- Y R Xie
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Infectious Disease Center, the First Affiliated Hospital of Medical School, Zhejiang University, Hangzhou, China
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Qi ZH, Li CF, Ma XX, Li ZF, Zhang K, Yu DX. [Application value of 3T 1H-magnetic resonance spectroscopy in diagnosing tumors of bone and soft tissue]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 2011; 33:504-510. [PMID: 22338133] [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: 05/31/2023]
Abstract
OBJECTIVE To study benign and malignant bone and soft tissue tumors with 1H-magnetic resonance spectroscopy (1H-MRS) at 3 Tesla MR scanner and assess the value of 1H-MRS in diagnosing bone and soft tissue tumors and distinguishing benign from malignant tumors. METHODS; Totally 49 patients with clinically and pathologically confirmed bone and soft tissue tumors were enrolled in this study. 1H-MRS was performed before treatment with point-resolved spectroscopy sequence. The imaging characteristics of 1H-MRS for bone and soft tissue tumors were observed and the possible differences between benign and malignant tumors was compared. Since spectra were directly found under single-voxel proton MRS brain examination, the peak height of choline containing compounds (Cho) opposite to the creatine (Cr) and the Cho peak were observed, and then the malignancies of the tumors were judged. Cho/Cr value was calculated and used to distinguishing benign tumors from malignancies. RESULTS 1H-MRS spectra of bone and soft tissue tumors were different from those of the normal muscles, and such difference also existed between benign and malignant tumors. The Cho peak disappeared or was extremely low among benign tumors. The Cho/Cr values of malignant tumors and benign tumors were 3.13 +/- 0.9 and 1.34 +/- 1.02, respectively (P = 0.02). Using 1.79 as the threshold value, the Cho/Cr value had sensitivity, specificity, and accuracy of 94%, 80%, and 90%, respectively, in diagnosing malignancies. CONCLUSIONS The increased Cho level, as measured by 1H-MRS, is related with the bone and soft tissue malignant tumor. Cho/Cr value is useful in distinguishing benign tumors from malignancies. 1H-MRS can be an important supplement to the conventional magnetic resonance imaging.
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Affiliation(s)
- Zi-Hua Qi
- Department of Radiology, Computed Tomography Section, Qilu Hospital of Shandong University, Jinan 250012, China.
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Li ZF, Xia XC, He ZH, Li X, Zhang LJ, Wang HY, Meng QF, Yang WX, Li GQ, Liu DQ. Seedling and Slow Rusting Resistance to Leaf Rust in Chinese Wheat Cultivars. Plant Dis 2010; 94:45-53. [PMID: 30754399 DOI: 10.1094/pdis-94-1-0045] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Identification of resistance genes is important for developing leaf rust resistant wheat (Triticum aestivum) cultivars. A total of 102 Chinese winter wheat cultivars and advanced lines were inoculated with 24 pathotypes of Puccinia triticina for postulation of leaf rust resistance genes effective at the seedling stage. These genotypes were also planted in the field for characterization of slow rusting responses to leaf rust in the 2006-07 and 2007-08 cropping seasons. Fourteen leaf rust resistance genes-Lr1, Lr2a, Lr3bg, Lr3ka, Lr14a, Lr16, Lr17a, Lr18, Lr20, Lr23, Lr24, Lr26, Lr34, and LrZH84-either singly or in combinations, were postulated in 65 genotypes, whereas known resistance genes were not identified in the other 37 accessions. Resistance gene Lr26 was present in 44 accessions. Genes Lr14a and Lr34 were each detected in seven entries. Lr1 and Lr3ka were each found in six cultivars, and five lines possessed Lr16. Lr17a and Lr18 were each identified in four lines. Three cultivars were postulated to possess Lr3bg. Genes Lr20, Lr24, and LrZH84 were each present in two cultivars. Each of the genes Lr2a and Lr23 may exist in one line. Fourteen genotypes showed slow leaf rusting resistance in two cropping seasons.
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Affiliation(s)
- Z F Li
- Department of Plant Pathology, College of Plant Protection, Agricultural University of Hebei, Biological Control Center for Plant Diseases and Plant Pests of Hebei, 289 Lingyusi Street, Baoding 071001, Hebei, China
| | - X C Xia
- Institute of Crop Science, National Wheat Improvement Center, Chinese Academy of Agricultural Sciences, 12 Zhongguancun South Street, Beijing 100081, China
| | - Z H He
- Institute of Crop Science, National Wheat Improvement Center, Chinese Academy of Agricultural Sciences and CIMMYT China Office, 12 Zhongguancun South Street, Beijing 100081, China
| | - X Li
- Department of Plant Pathology, College of Plant Protection, Agricultural University of Hebei, Biological Control Center for Plant Diseases and Plant Pests of Hebei, 289 Lingyusi Street, Baoding 071001, Hebei, China
| | - L J Zhang
- Department of Plant Pathology, College of Plant Protection, Agricultural University of Hebei, Biological Control Center for Plant Diseases and Plant Pests of Hebei, 289 Lingyusi Street, Baoding 071001, Hebei, China
| | - H Y Wang
- Department of Plant Pathology, College of Plant Protection, Agricultural University of Hebei, Biological Control Center for Plant Diseases and Plant Pests of Hebei, 289 Lingyusi Street, Baoding 071001, Hebei, China
| | - Q F Meng
- Department of Plant Pathology, College of Plant Protection, Agricultural University of Hebei, Biological Control Center for Plant Diseases and Plant Pests of Hebei, 289 Lingyusi Street, Baoding 071001, Hebei, China
| | - W X Yang
- Department of Plant Pathology, College of Plant Protection, Agricultural University of Hebei, Biological Control Center for Plant Diseases and Plant Pests of Hebei, 289 Lingyusi Street, Baoding 071001, Hebei, China
| | - G Q Li
- Plant Protection Institute, Chinese Academy of Agricultural Sciences, 2 Yuanmingyuan West Road, Beijing 100091, China
| | - D Q Liu
- Department of Plant Pathology, College of Plant Protection, Agricultural University of Hebei, Biological Control Center for Plant Diseases and Plant Pests of Hebei, 289 Lingyusi Street, Baoding 071001, Hebei, China
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Zhao LY, Huang C, Li ZF, Liu L, Ni L, Song TS. STAT1/2 is involved in the inhibition of cell growth induced by U0126 in HeLa cells. Cell Mol Biol (Noisy-le-grand) 2009; 55 Suppl:OL1168-OL1174. [PMID: 20003811] [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] [Received: 04/26/2009] [Accepted: 10/01/2009] [Indexed: 05/28/2023]
Abstract
The mitogen-activated protein kinase (MAPK) signaling cascade plays an important role in cell life. Herein we show that small interfering RNAs targeting MAPK1 can inhibit HeLa cell growth and induce apoptosis along with up-regulation of signal transducers and activator 1 and 2 (STAT1/2). However, across-talk between the ras-raf-ERK1/2 signalling cascade and the JAK-STAT pathway remain largely unknown. Using MEK inhibitor U0126 and JAK-2 inhibitor AG490, we analyzed the relationship between ERK1/2 and STAT1/2 in HeLa cells. U0126 inhibited HeLa cell growth, arrested the cell cycle at G1/G0, and induced cell apoptosis, and AG490 partially reversed the effects of U0126. U0126 induced up-regulation of ERK1/2 and down-regulation of phosphorylated ERK1/2, increased STAT1 and STAT2 expression in a dose-dependent manner, and activated STAT1/2 via their phosphorylation. AG490 markedly inhibited the phosphorylation of STAT1 and STAT2 and slightly increased that of ERK1/2 inhibited by U0126. We suggest that STAT1/2 is involved in the inhibition of cell growth induced by U0126 in HeLa cells.
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Affiliation(s)
- L Y Zhao
- Department of Genetics and Molecular Biology, Medical School, Xi'an Jiaotong University/Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Shaanxi, PR China
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Qi ZH, Li CF, Ma XX, Li ZF, Zhang K, Yu DX. [Changes of 3-tesla 31P-MR spectroscopy of bone and soft tissue tumors]. Zhonghua Zhong Liu Za Zhi 2009; 31:442-446. [PMID: 19950555] [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: 05/28/2023]
Abstract
OBJECTIVE To study the characteristic changes of 31P-MR spectroscopy of bone and soft tissue tumors. METHODS 41 patients were examined by phosphorus surface coil of 3 tesla MR machine, including 18 benign tumor foci and 28 malignant foci, and adjacent normal muscles. The areas under the peaks of various metabolites in the spectra were measured, including phosphomonoester (PME), inorganic phosphours (Pi), phosphodiester (PDE), phosphocreatine (Pcr), adenosine triphosphate (ATP) gamma, alpha, beta. The ratios of the metabolites to beta-ATP, NTP and Pcr were calculated. Intracellular pH was calculated according to the chemical shift change of Pi relative to Pcr. RESULTS The ratios of Pcr/PME and PME/NTP in benign and malignant tumor groups were significantly different from those of the normal group (P<0.05). Between benign and malignant tumor groups, the ratios of PME/beta-ATP and PME/NTP were significantly different (P<0.05). CONCLUSION Pcr/PME and PME/NTP are potential diagnostic indexes of bone and soft tissue tumors. PME/beta-ATP and PME/NTP are potential indexes of differential diagnosis of bone and soft tissue tumors.
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Affiliation(s)
- Zi-Hua Qi
- Department of Radiology, Qilu Hospital of Shandong University, Jinan 250012, China.
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Jiang L, Wei XF, Yi DH, Xu P, Liu H, Chang Q, Yang SM, Li ZF, Gao HB, Hao GJ. Synergistic effects of cyclic strain and Th1-like cytokines on tenascin-C production by rheumatic aortic valve interstitial cells. Clin Exp Immunol 2009; 155:216-23. [PMID: 19040616 PMCID: PMC2675252 DOI: 10.1111/j.1365-2249.2008.03747.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [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: 07/08/2008] [Indexed: 12/19/2022] Open
Abstract
Tenascin-C (TN-C) is a key component of extracellular matrix (ECM) and its expression process is poorly understood during rheumatic heart valvular disease (RHVD). In this study, we found that interferon (IFN)-gamma, tumour necrosis factor (TNF)-alpha and TN-C concentrations in patients with RHVD were significantly higher than in normal controls. More IFN-gamma receptors and TNF receptors were found being expressed on rheumatic aortic valves interstitial cells than on non-rheumatic ones and their expression was patients' sera dependent. Antibodies neutralizing IFN-gamma or TNF-alpha could attenuate patients' sera-induced TN-C transcription by isolated rheumatic aortic valves interstitial cells. By application with different protein kinase inhibitors, we found that combined with cyclic strain, TNF-alpha and IFN-gamma induced TN-C transcription through the RhoA/ROCK signalling pathway. At the same time, p38 mitogen-activated protein kinase was involved in TNF-alpha and IFN-gamma induced TN-C transcription. TNF-alpha also increased TN-C mRNA level by additional PKC and ERK 1/2 activation. Our finding revealed a new insight into ECM remodelling during RHVD pathogenesis and new mechanisms involved in the clinical anti-IFN-gamma and anti-TNF-alpha therapy.
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Affiliation(s)
- L Jiang
- Department of Cardiac Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, China
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Zhao XL, Zheng TC, Xia XC, He ZH, Liu DQ, Yang WX, Yin GH, Li ZF. Molecular mapping of leaf rust resistance gene LrZH84 in Chinese wheat line Zhou 8425B. Theor Appl Genet 2008; 117:1069-75. [PMID: 18651124 DOI: 10.1007/s00122-008-0845-9] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2008] [Accepted: 07/05/2008] [Indexed: 05/08/2023]
Abstract
Leaf rust, caused by Puccinia triticina, is one of the most widespread diseases in common wheat (Triticum aestivum L.) worldwide. With the objective of identifying and mapping new genes for resistance to leaf rust, F(1), F(2) plants and F(3) lines from a cross between resistant line Zhou 8425B and susceptible line Chinese Spring were inoculated with Chinese P. triticina races THTT and MBHP in the greenhouse. A total of 793 pairs of SSR primers were used to test the parents and resistant and susceptible bulks. Seven polymorphic chromosome 1B markers were used for genotyping the F(2) and F(3) populations. Zhou 8425B carried a single dominant resistance gene, temporarily designated LrZH84, linked to SSR markers gwm582 and barc8 with genetic distances of 3.9 and 5.2 cM, respectively. The Xbarc8 allele co-segregated with Lr26 in the F(3) population. The Xgwm582 allele associated with LrZH84 was identified as a leaf rust resistance gene and shown to be present in the Predgornaia 2 parent of Zhou 8425B. The seedling reaction pattern of LrZH84 was different from those of lines with Lr26, Lr33, Lr44 and Lr46, all of which are located in chromosome 1B. It was concluded that LrZH84 is likely to be a new leaf rust resistance gene.
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Affiliation(s)
- X L Zhao
- Department of Plant Pathology, College of Plant Protection, Agricultural University of Hebei, Biological Control Center for Plant Diseases and Plant Pests of Hebei, 289 Lingyusi Street, 071001 Baoding, Hebei, China
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Li ZF, Xia XC, Zhou XC, Niu YC, He ZH, Zhang Y, Li GQ, Wan AM, Wang DS, Chen XM, Lu QL, Singh RP. Seedling and Slow Rusting Resistance to Stripe Rust in Chinese Common Wheats. Plant Dis 2006; 90:1302-1312. [PMID: 30780937 DOI: 10.1094/pd-90-1302] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Identification of seedling and slow stripe rust resistance genes is important for gene pyramiding, gene deployment, and developing slow-rusting wheat cultivars to control the disease. A total of 98 Chinese lines were inoculated with 26 pathotypes of Puccinia striiformis f. sp. tritici for postulation of stripe rust resistance genes effective at the seedling stage. A total of 135 wheat lines were planted at two locations to characterize their slow rusting responses to stripe rust in the 2003-2004 and 2004-2005 cropping seasons. Genes Yr2, Yr3a, Yr4a, Yr6, Yr7, Yr9, Yr26, Yr27, and YrSD, either singly or in combinations, were postulated in 72 lines, whereas known resistance genes were not identified in the other 26 accessions. The resistance genes Yr9 and Yr26 were found in 42 and 19 accessions, respectively. Yr3a and Yr4a were detected in two lines, and four lines may contain Yr6. Three lines were postulated to possess YrSD, one carried Yr27, and one may possess Yr7. Thirty-three lines showed slow stripe rusting resistance at two locations in both seasons.
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Affiliation(s)
- Z F Li
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences, Zhongguancun South Street 12, 100081, Beijing, China
| | - X C Xia
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences, Zhongguancun South Street 12, 100081, Beijing, China
| | - X C Zhou
- Gansu Winter Wheat Research Institute, Duan Jia Tan 418, 730020, Lanzhou, China
| | - Y C Niu
- Plant Protection Institute, Chinese Academy of Agricultural Science, Yuanmingyuan West Road 2, 100094, Beijing, China
| | - Z H He
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences, and International Maize and Wheat Improvement Center (CIMMYT) China Office, C/O CAAS, Zhongguancun South Street 12, 100081, Beijing, China
| | - Y Zhang
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences
| | - G Q Li
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences
| | - A M Wan
- Plant Protection Institute, Chinese Academy of Agricultural Science
| | - D S Wang
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences
| | - X M Chen
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences
| | - Q L Lu
- Gansu Winter Wheat Research Institute
| | - R P Singh
- CIMMYT, Apdo. Postal 6-641, 06600, Mexico D.F., Mexico
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Li GQ, Li ZF, Yang WY, Zhang Y, He ZH, Xu SC, Singh RP, Qu YY, Xia XC. Molecular mapping of stripe rust resistance gene YrCH42 in Chinese wheat cultivar Chuanmai 42 and its allelism with Yr24 and Yr26. Theor Appl Genet 2006; 112:1434-40. [PMID: 16525837 DOI: 10.1007/s00122-006-0245-y] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2005] [Accepted: 02/13/2006] [Indexed: 05/07/2023]
Abstract
Stripe rust, caused by Puccinia striiformis f. sp. tritici (PST), is one of the most devastating diseases in common wheat (Triticum aestivum L.) worldwide. The objectives of this study were to map a stripe rust resistance gene in Chinese wheat cultivar Chuanmai 42 using molecular markers and to investigate its allelism with Yr24 and Yr26. A total of 787 F2 plants and 186 F3 lines derived from a cross between resistant cultivar Chuanmai 42 and susceptible line Taichung 29 were used for resistance gene tagging. Also 197 F2 plants from the cross Chuanmai 42xYr24/3*Avocet S and 726 F2 plants from Chuanmai 42xYr26/3*Avocet S were employed for allelic test of the resistance genes. In all, 819 pairs of wheat SSR primers were used to test the two parents, as well as resistant and susceptible bulks. Subsequently, nine polymorphic markers were employed for genotyping the F2 and F3 populations. Results indicated that the stripe rust resistance in Chuanmai 42 was conferred by a single dominant gene, temporarily designated YrCH42, located close to the centromere of chromosome 1B and flanked by nine SSR markers Xwmc626, Xgwm273, Xgwm11, Xgwm18, Xbarc137, Xbarc187, Xgwm498, Xbarc240 and Xwmc216. The resistance gene was closely linked to Xgwm498 and Xbarc187 with genetic distances of 1.6 and 2.3 cM, respectively. The seedling tests with 26 PST isolates and allelic tests indicated that YrCH42, Yr24 and Yr26 are likely to be the same gene.
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Affiliation(s)
- G Q Li
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences (CAAS), Zhongguancun South Street 12, 100081 Beijing, China
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Li ZF, Zheng TC, He ZH, Li GQ, Xu SC, Li XP, Yang GY, Singh RP, Xia XC. Molecular tagging of stripe rust resistance gene YrZH84 in Chinese wheat line Zhou 8425B. Theor Appl Genet 2006; 112:1098-103. [PMID: 16450183 DOI: 10.1007/s00122-006-0211-8] [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] [Subscribe] [Scholar Register] [Received: 10/04/2005] [Accepted: 12/28/2005] [Indexed: 05/06/2023]
Abstract
Stripe rust, caused by Puccinia striiformis f. sp. tritici (PST), is one of the most damaging diseases in common wheat (Triticum aestivum L.). With the objective of identifying and tagging new genes for resistance to stripe rust, F1, F2 and F3 populations from the cross Zhou 8425B/Chinese Spring were inoculated with Chinese PST isolate CYR32 in the greenhouse. A total of 790 SSR primers were used to test the parents and resistant and susceptible bulks. The resulting seven polymorphic markers on chromosome 7BL were used for genotyping F2 and F3 populations. Results indicated that Zhou 8425B carries a single dominant resistance gene, temporarily designated YrZH84, closely linked to SSR markers Xcfa2040-7B and Xbarc32-7B with genetic distances of 1.4 and 4.8 cM, respectively. In a seedling test with 25 PST isolates, the reaction patterns of YrZH84 were different from those of lines carrying Yr2 and Yr6. It was concluded that YrZH84 is probably a new stripe rust resistance gene.
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Affiliation(s)
- Z F Li
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences (CAAS), Zhongguancun South Street 12, 100081 Beijing, China
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