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Hu XF, Xie JY. [Current status and prospects of genetic research on membranous nephropathy]. Zhonghua Yi Xue Za Zhi 2024; 104:1360-1362. [PMID: 38644284 DOI: 10.3760/cma.j.cn112137-20231108-01037] [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: 04/23/2024]
Abstract
Primary membranous nephropathy (PMN) is one of the most frequent pathological subtypes of nephrotic syndrome in adults. The use of genome-wide association study (GWAS) technology has propelled the transition from conventional medicine to precision medicine, offering a fresh perspective for comprehending the pathogenesis of PMN and individual variations in greater detail. Furthermore, GWAS will aid in clinical translation, laying a firm foundation for the precise diagnosis and treatment of PMN.
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Affiliation(s)
- X F Hu
- Department of Nephrology, Institute of Nephrology, Shanghai Ruijin Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai 200025, China
| | - J Y Xie
- Department of Nephrology, Institute of Nephrology, Shanghai Ruijin Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai 200025, China
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Lei YP, Song QZ, Liu S, Xie JY, Lv GQ. Predicting lymph node metastasis in colorectal cancer: An analysis of influencing factors to develop a risk model. World J Gastrointest Surg 2023; 15:2234-2246. [PMID: 37969707 PMCID: PMC10642478 DOI: 10.4240/wjgs.v15.i10.2234] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 09/07/2023] [Accepted: 09/14/2023] [Indexed: 10/27/2023] Open
Abstract
BACKGROUND Colorectal cancer (CRC) is a significant global health issue, and lymph node metastasis (LNM) is a crucial prognostic factor. Accurate prediction of LNM is essential for developing individualized treatment strategies for patients with CRC. However, the prediction of LNM is challenging and depends on various factors such as tumor histology, clinicopathological features, and molecular characteristics. The most reliable method to detect LNM is the histopathological examination of surgically resected specimens; however, this method is invasive, time-consuming, and subject to sampling errors and interobserver variability. AIM To analyze influencing factors and develop and validate a risk prediction model for LNM in CRC based on a large patient queue. METHODS This study retrospectively analyzed 300 patients who underwent CRC surgery at two Peking University Shenzhen hospitals between January and December 2021. A deep learning approach was used to extract features potentially associated with LNM from primary tumor histological images while a logistic regression model was employed to predict LNM in CRC using machine-learning-derived features and clinicopathological variables as predictors. RESULTS The prediction model constructed for LNM in CRC was based on a logistic regression framework that incorporated machine learning-extracted features and clinicopathological variables. The model achieved high accuracy (0.86), sensitivity (0.81), specificity (0.87), positive predictive value (0.66), negative predictive value (0.94), area under the curve for the receiver operating characteristic (0.91), and a low Brier score (0.10). The model showed good agreement between the observed and predicted probabilities of LNM across a range of risk thresholds, indicating good calibration and clinical utility. CONCLUSION The present study successfully developed and validated a potent and effective risk-prediction model for LNM in patients with CRC. This model utilizes machine-learning-derived features extracted from primary tumor histology and clinicopathological variables, demonstrating superior performance and clinical applicability compared to existing models. The study provides new insights into the potential of deep learning to extract valuable information from tumor histology, in turn, improving the prediction of LNM in CRC and facilitate risk stratification and decision-making in clinical practice.
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Affiliation(s)
- Yun-Peng Lei
- Department of Gastrointestinal Surgery, Peking University Shenzhen Hospital, Shenzhen 518036, Guangdong Province, China
| | - Qing-Zhi Song
- Department of Gastrointestinal Surgery, Peking University Shenzhen Hospital, Shenzhen 518036, Guangdong Province, China
| | - Shuang Liu
- Department of Gastrointestinal Surgery, Peking University Shenzhen Hospital, Shenzhen 518036, Guangdong Province, China
| | - Ji-Yan Xie
- Department of Gastrointestinal Surgery, Peking University Shenzhen Hospital, Shenzhen 518036, Guangdong Province, China
| | - Guo-Qing Lv
- Department of Gastrointestinal Surgery, Shenzhen Peking University-The Hong Kong University of Science and Technology Medical Center, Peking University Shenzhen Hospital, Shenzhen 518036, Guangdong Province, China
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3
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Tong ZJ, Lan HT, Tan YM, Xie JY, Zhang W, Zhong M, Wang ZH. [Research update on the association between clonal hematopoiesis with indeterminant potential and cardiovascular diseases]. Zhonghua Xin Xue Guan Bing Za Zhi 2022; 50:85-90. [PMID: 35045622 DOI: 10.3760/cma.j.cn112148-20211202-01037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Affiliation(s)
- Z J Tong
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - H T Lan
- Department of Geriatric Medicine, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Shandong Key Laboratory of Cardiovascular Proteomics, Jinan 250012, China
| | - Y M Tan
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - J Y Xie
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - W Zhang
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - M Zhong
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Z H Wang
- Department of Geriatric Medicine, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Shandong Key Laboratory of Cardiovascular Proteomics, Jinan 250012, China
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Liu BL, Xie JY, Wang YF, Yi ZB, Guan XW, Li LX, Zhai JT, Li H, Li H, Ma F. [Exploration of the high-risk factors of catheter-related thrombosis in breast cancer]. Zhonghua Zhong Liu Za Zhi 2021; 43:838-842. [PMID: 34407588 DOI: 10.3760/cma.j.cn112152-20200226-00131] [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 explore the high risk factors of catheter-related thrombosis (CRT) in breast cancer patients, and provide the basis for the development of appropriate prevention and treatment strategies. Methods: A total of 1 432 breast cancer patients scheduled to receive central venous catheterization in National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College from January 1, 2015 to August 31, 2019 were selected. Baseline information and catheterization information of patients were collected. The occurrence of CRT was confirmed by vascular ultrasound examination, and the influencing factors of CRT were analyzed. Results: The total number of catheter days were 121, 980 days in 1 432 patients with breast cancer, and the average number of catheter days in each patient was 85.2 days. The incidence of CRT was 6.8% (97/1 432), which was 0.79 cases/1 000 catheter days. Among 815 patients with centrally inserted central venous catheters (CICC), 43 (5.3%) had CRT, which was 0.70 cases/1 000 catheter days. Among 617 patients with peripherally inserted central venous catheters (PICC), 54 (8.8%) developed CRT, which was 0.90 cases/1 000 catheter days. CRT was most common in subclavian vein (63.9%). Multivariate regression analysis showed that age ≥ 60 years old (OR=1.712, 95% CI: 1.056-2.775, P=0.029), PICC (OR=1.732, 95% CI: 1.130-2.656, P=0.012), the catheter position except subclavian vein (OR=10.420, 95% CI: 1.207-89.991), secondary adjustment of catheter position (OR=3.985, 95% CI: 1.510-10.521, P=0.005) and high D-Dimer level (OR=1.129, 95% CI: 1.026-1.241, P=0.012)were independent risk factors for CRT. Conclusions: The CRT problem can't be ignored in the clinical treatment of breast cancer patients with central venous catheterization. Screening the appropriate age of patients and the type of central venous catheters, reducing the secondary adjustment of catheter position, and timely monitoring the level of D-dimer are helpful to the prevention and treatment of CRT.
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Affiliation(s)
- B L Liu
- Department of Medical Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - J Y Xie
- Department of Medical Oncology, Cancer Hospital of Huanxing, Beijing 100065, China
| | - Y F Wang
- Department of Comprehensive Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Z B Yi
- Department of Medical Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - X W Guan
- Department of Medical Oncology, 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 X Li
- Department of Medical Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - J T Zhai
- Department of Medical Oncology, 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 Li
- Department of Medical Oncology, 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 Li
- Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - F Ma
- Department of Medical Oncology, 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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Xie JY, Wei JX, Lv LH, Han QF, Yang WB, Li GL, Wang PX, Wu SB, Duan JX, Zhuo WF, Liu PQ, Min J. Angiopoietin-2 induces angiogenesis via exosomes in human hepatocellular carcinoma. Cell Commun Signal 2020; 18:46. [PMID: 32183816 PMCID: PMC7077328 DOI: 10.1186/s12964-020-00535-8] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 02/13/2020] [Indexed: 12/12/2022] Open
Abstract
Background Hepatocellular carcinoma (HCC) is the most common primary liver cancer and is a highly vascularized solid tumor. Angiopoietin-2 (ANGPT2) has been described as an attractive target for antiangiogenic therapy. Exosomes are small extracellular vesicles secreted by most cell types and contribute to cell-to-cell communication by delivering functional cargo to recipient cells. The expression of ANGPT2 in tumor-derived exosomes remains unknown. Methods We detected the ANGPT2 expression in HCC-derived exosomes by immunoblotting, enzyme-linked immunosorbent assay and immunogold labeling, then observed exosomal ANGPT2 internalization and recycling by confocal laser scanning microscopy, co-immunoprecipitation and immunoblotting. We used two HCC cell lines (Hep3B and MHCC97H) to overexpress ANGPT2 by lentivirus infection or knockdown ANGPT2 by the CRISPR/Cas system, then isolated exosomes to coculture with human umbilical vein endothelial cells (HUVECs) and observed the angiogenesis by Matrigel microtubule formation assay, transwell migration assay, wound healing assay, cell counting kit-8 assay, immunoblotting and in vivo tumorigenesis assay. Results We found that HCC-derived exosomes carried ANGPT2 and delivered it into HUVECs by exosome endocytosis, this delivery led to a notable increase in angiogenesis by a Tie2-independent pathway. Concomitantly, we observed that HCC cell-secreted exosomal ANGPT2 was recycled by recipient HUVECs and might be reused. In addition, the CRISPR-Cas systems to knock down ANGPT2 significantly inhibited the angiogenesis induced by HCC cell-secreted exosomal ANGPT2, and obviously suppressed the epithelial-mesenchymal transition activation in HCC. Conclusions Taken together, these results reveal a novel pathway of tumor angiogenesis induced by HCC cell-secreted exosomal ANGPT2 that is different from the classic ANGPT2/Tie2 pathway. This way may be a potential therapeutic target for antiangiogenic therapy. Video Abstract
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Affiliation(s)
- Ji-Yan Xie
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China.,Department of Hepatobiliary Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China
| | - Jin-Xing Wei
- Department of Hepatobiliary Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China
| | - Li-Hong Lv
- Clinical Trial Institution of Pharmaceuticals, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China
| | - Qing-Fang Han
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital of Zhengzhou University, No.1, Jianshedong Road, Zhengzhou, 450052, Henan Province, China
| | - Wei-Bang Yang
- Department of Hepatobiliary Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China
| | - Guo-Lin Li
- Department of Hepatobiliary Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China
| | - Pan-Xia Wang
- Laboratory of Pharmacology and Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Shao-Bin Wu
- Department of Hepatobiliary Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China
| | - Jin-Xin Duan
- Department of Hepatobiliary Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China
| | - Wen-Feng Zhuo
- Department of Hepatobiliary Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China
| | - Pei-Qing Liu
- Laboratory of Pharmacology and Toxicology, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China.
| | - Jun Min
- Department of Hepatobiliary Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China.
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Hu YJ, Yu WC, Lai KT, Sun D, Balakirev FF, Zhang W, Xie JY, Yip KY, Aulestia EIP, Jha R, Higashinaka R, Matsuda TD, Yanase Y, Aoki Y, Goh SK. Detection of Hole Pockets in the Candidate Type-II Weyl Semimetal MoTe_{2} from Shubnikov-de Haas Quantum Oscillations. Phys Rev Lett 2020; 124:076402. [PMID: 32142308 DOI: 10.1103/physrevlett.124.076402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 11/08/2019] [Accepted: 01/24/2020] [Indexed: 06/10/2023]
Abstract
The bulk electronic structure of T_{d}-MoTe_{2} features large hole Fermi pockets at the Brillouin zone center (Γ) and two electron Fermi surfaces along the Γ-X direction. However, the large hole pockets, whose existence has important implications for the Weyl physics of T_{d}-MoTe_{2}, has never been conclusively detected in quantum oscillations. This raises doubt about the realizability of Majorana states in T_{d}-MoTe_{2}, because these exotic states rely on the existence of Weyl points, which originated from the same band structure predicted by density functional theory (DFT). Here, we report an unambiguous detection of these elusive hole pockets via Shubnikov-de Haas (SdH) quantum oscillations. At ambient pressure, the quantum oscillation frequencies for these pockets are 988 and 1513 T, when the magnetic field is applied along the c axis. The quasiparticle effective masses m^{*} associated with these frequencies are 1.50 and 2.77 m_{e}, respectively, indicating the importance of Coulomb interactions in this system. We further measure the SdH oscillations under pressure. At 13 kbar, we detected a peak at 1798 T with m^{*}=2.86m_{e}. Relative to the oscillation data at a lower pressure, the amplitude of this peak experienced an enhancement, which can be attributed to the reduced curvature of the hole pockets under pressure. Combining our experimental data with DFT+U calculations, where U is the Hubbard parameter, our results shed light on why these important hole pockets have not been detected until now.
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Affiliation(s)
- Y J Hu
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - W C Yu
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong
- Department of Physics, City University of Hong Kong, Kowloon, Hong Kong
| | - Kwing To Lai
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - D Sun
- National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - F F Balakirev
- National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - W Zhang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - J Y Xie
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - K Y Yip
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong
| | | | - Rajveer Jha
- Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - Ryuji Higashinaka
- Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - Tatsuma D Matsuda
- Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - Y Yanase
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - Yuji Aoki
- Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - Swee K Goh
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong
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Liu YZ, Xie JY. [Precision medicine in FSGS: gene diagnosis strategy and its clinical significance]. Zhonghua Yi Xue Za Zhi 2018; 98:1057-1059. [PMID: 29690720 DOI: 10.3760/cma.j.issn.0376-2491.2018.14.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
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8
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Liu YZ, Xie JY, Chen N. [Genetic diagnosis strategy of focal segmental glomerulosclerosis]. Zhonghua Nei Ke Za Zhi 2017; 56:624-627. [PMID: 28789499 DOI: 10.3760/cma.j.issn.0578-1426.2017.08.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
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9
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Liu X, Li JX, Hu JZ, Shen Y, Wan R, Xiong QM, Zhou QQ, Xie JY, Jin JJ, Yan X, Yu JH, Hong K. [Recurrent syncope related to catecholaminergic polymorphic ventricular tachycardia due to de novo RyR2-R2401H mutation]. Zhonghua Xin Xue Guan Bing Za Zhi 2017; 45:39-43. [PMID: 28100344 DOI: 10.3760/cma.j.issn.0253-3758.2017.01.008] [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] [Indexed: 11/05/2022]
Abstract
Objective: To explore the clinical and molecular genetic features of a Chinese patient with catecholaminergic polymorphic ventricular tachycardia (CPVT). Methods: Clinical data including resting electrocardiography, echocardiography and treadmill exercise testing of a patient with CPVT admitted to our department in March 2013 were analyzed, and the peripheral venous blood samples of the patient and his family members and 400 ethnicity-matched healthy controls were obtained. All exons and exon-intron boundaries of the six CPVT-related genes including RYR2, CASQ2, TRDN, CALM1, KCNJ2 and ANKB were sequenced to detect the variants related to CPVT. The relationship between the genotypes and phenotypes was analyzed to direct the target therapy. Results: Recurrent syncope induced either by exercise or extreme frightened fear was observed in this patient. There was no positive family history of syncope or sudden death. The resting electrocardiography and echocardiography of the patient were normal, while the exercise testing revealed bidirectional and polymorphic ventricular tachycardia. A cardiac ryanodine receptor gene mutation (R2401H) was identified in this patient, while this mutation was absent in his parents and sister and 400 controls. No variant was detected in the remaining five candidate genes. Treatment with high dose of metoprolol succinate (118.75 mg/d) was effective and patient was free of syncopal attack during the 2 years follow-up. Conclusion: This is the first report on RyR2-R2401H mutation in Chinese patient with CPVT, and high dose of metoptolol is the effective therapy option for CPVT related to RyR2 mutation.
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Affiliation(s)
- X Liu
- Department of Cardiology, Second Affiliated Hospital of Nanchang University, Nanchang 330006, China
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Witharana WKL, Cardiff J, Chawla MK, Xie JY, Alme CB, Eckert M, Lapointe V, Demchuk A, Maurer AP, Trivedi V, Sutherland RJ, Guzowski JF, Barnes CA, McNaughton BL. Nonuniform allocation of hippocampal neurons to place fields across all hippocampal subfields. Hippocampus 2016; 26:1328-44. [PMID: 27273259 DOI: 10.1002/hipo.22609] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/01/2016] [Indexed: 11/09/2022]
Abstract
The mechanisms governing how the hippocampus selects neurons to exhibit place fields are not well understood. A default assumption in some previous studies was the uniform random draw with replacement (URDWR) model, which, theoretically, maximizes spatial "pattern separation", and predicts a Poisson distribution of the numbers of place fields expressed by a given cell per unit area. The actual distribution of mean firing rates exhibited by a population of hippocampal neurons, however, is approximately exponential or log-normal in a given environment and these rates are somewhat correlated across multiple places, at least under some conditions. The advantage of neural activity-dependent immediate-early gene (IEG) analysis, as a proxy for electrophysiological recording, is the ability to obtain much larger samples of cells, even those whose activity is so sparse that they are overlooked in recording studies. Thus, a more accurate representation of the activation statistics can potentially be achieved. Some previous IEG studies that examined behavior-driven IEG expression in CA1 appear to support URDWR. There was, however, in some of the same studies, an under-recruitment of dentate gyrus granule cells, indicating a highly skewed excitability distribution, which is inconsistent with URDWR. Although it was suggested that this skewness might be related to increased excitability of recently generated granule cells, we show here that CA1, CA3, and subiculum also exhibit cumulative under-recruitment of neurons. Thus, a highly skewed excitability distribution is a general principle common to all major hippocampal subfields. Finally, a more detailed analysis of the frequency distributions of IEG intranuclear transcription foci suggests that a large fraction of hippocampal neurons is virtually silent, even during sleep. Whether the skewing of the excitability distribution is cell-intrinsic or a network phenomenon, and the degree to which this excitability is fixed or possibly time-varying are open questions for future studies. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- W K L Witharana
- Canadian Centre for Behavioural Neuroscience, University of Lethbridge, T1K 3M4
| | - J Cardiff
- Canadian Centre for Behavioural Neuroscience, University of Lethbridge, T1K 3M4
| | - M K Chawla
- Evelyn F. McKnight Brain Institute, University of Arizona, Tucson, Arizona
| | - J Y Xie
- Canadian Centre for Behavioural Neuroscience, University of Lethbridge, T1K 3M4
| | - C B Alme
- Canadian Centre for Behavioural Neuroscience, University of Lethbridge, T1K 3M4.,Kavli Institute for System Neuroscience and Centre for Neural Computation, Norwegian University of Science and Technology, Trondheim, Norway
| | - M Eckert
- Canadian Centre for Behavioural Neuroscience, University of Lethbridge, T1K 3M4
| | - V Lapointe
- Canadian Centre for Behavioural Neuroscience, University of Lethbridge, T1K 3M4
| | - A Demchuk
- Canadian Centre for Behavioural Neuroscience, University of Lethbridge, T1K 3M4
| | - A P Maurer
- Department of Neuroscience, College of Medicine, University of Florida, Gainesville, Florida
| | - V Trivedi
- Canadian Centre for Behavioural Neuroscience, University of Lethbridge, T1K 3M4
| | - R J Sutherland
- Canadian Centre for Behavioural Neuroscience, University of Lethbridge, T1K 3M4
| | - J F Guzowski
- Center for Neurobiology of Learning and Memory, Department of Neurobiology and Behavior, University of California, Irvine
| | - C A Barnes
- Evelyn F. McKnight Brain Institute, University of Arizona, Tucson, Arizona
| | - B L McNaughton
- Canadian Centre for Behavioural Neuroscience, University of Lethbridge, T1K 3M4. .,Center for Neurobiology of Learning and Memory, Department of Neurobiology and Behavior, University of California, Irvine.
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Xie JY. Genetic and morphological variation of three freshwater lake populations of Coilia ectenes (Engraulidae). Genetika 2012; 48:1200-1206. [PMID: 23270269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Population structure of the important commercial fish, Coilia ectenes, was investigated in samples from three freshwater lakes in the Eastern China using a multivariate approach of morphometrics and mitochondrial DNA control region sequencing. A total of eighteen morphological distances of truss method and eight morphometric variables were taken from each fish. Multivariate analyses of the morphometric data revealed significant morphological differences among the three lake populations, especially for those samples from Taihu Lake. Discriminant functions were used to compare sites, and these permitted an 83% success rate in distinguishing fish from the three sites. However, no obviously geographical differentiation was found among those populations of C. ectenes based on the genetic data. In the AMOVA analysis, only 2.2% genetic variability came from different populations, and most of them were present within the sub-populations. Experience a recent population expansion and some movement of fish among those areas, quite possibly enough to bring about relative genetic homogeneity, but there is insufficient to prevent the three populations from differing phenotypically. The diversified environmental factors may be playing an important role in shaping morphological variations among those populations.
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Affiliation(s)
- J Y Xie
- School of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Changqing Garden, Wuhan 430023, China.
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12
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Tang SC, Xie JY, Huang ZH, Xu FJ, Yang W. UV-induced grafting processes with in situ formed photomask for micropatterning of two-component biomolecules. Langmuir 2010; 26:9905-9910. [PMID: 20486681 DOI: 10.1021/la100344f] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We report a photolithographic process for micropatterning of two-component biomolecules on a transparent organic film via lateral functional polymer brushes of poly(sodium acrylate) (P(AA)) and poly(glycidyl methacrylate) (P(GMA)). The pattern of binary polymer brushes were prepared via consecutive UV-initiated grafting processes, under the assistance of the in situ formed poly (4,4'-bi[N-(4-vinylbenzyl) pyridinium]) (P(BVV)) photomask. The epoxy groups of the P(GMA) microdomains can be aminated for covalently coupling biotin, while the P(AA) microdomains were used for immobilizing immunoglobulin (IgG). The resulting biotin- and IgG-coupled microdomains interact specifically with their corresponding target proteins, avidin and anti-IgG, respectively.
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Affiliation(s)
- S C Tang
- State Key Laboratory of Chemical Resource Engineering, Beijing, 100029, China
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Zhao Z, Chen Y, Ma CM, Tang CZ, Xie JY, Hu DY. [The role of European system for cardiac operative risk evaluation in the prediction of quality of life in patients after coronary artery bypass graft surgery]. Zhonghua Xin Xue Guan Bing Za Zhi 2010; 38:103-107. [PMID: 20398552] [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: 05/29/2023]
Abstract
OBJECTIVE To assess the value of European system for cardiac operative risk evaluation (EuroSCORE) in predicting quality of life in patients post coronary artery bypass graft surgery (CABG). METHODS A total of 387 patients underwent CABG in our institute from December of 2002 to December of 2007 were assessed by EuroSCORE before operation. Health-related quality of life (QoL) was estimated postoperatively with Seattle angina questionnaire (SAQ), Nottingham healthy profile (NHP) and Duke activity status index (DASI) in order to evaluate the value of EuroSCORE for predicting quality of life in patients post CABG. RESULTS There were statistically significant but weak correlations between postoperative QoL score and preoperative EuroSCORE score (r: 0.010 - 0.276). Emotional and psychological experience subgroup analysis showed better predictive value of EuroSCORE score on postoperative QoL score in improved physical functioning subgroups (r > 0.2). Linear regression analysis showed that EuroSCORE score was significant but weakly (r(2) < 0.1) correlated with postoperative QoL score (P < 0.05). CONCLUSION Preoperative EuroSCORE score is weakly correlated with postoperative QoL score in patients post CABG.
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Affiliation(s)
- Zhou Zhao
- Heart Center, People's Hospital of Peking University, Beijing 100044, China
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Vera-Portocarrero LP, Zhang ET, Ossipov MH, Xie JY, King T, Lai J, Porreca F. Descending facilitation from the rostral ventromedial medulla maintains nerve injury-induced central sensitization. Neuroscience 2006; 140:1311-20. [PMID: 16650614 DOI: 10.1016/j.neuroscience.2006.03.016] [Citation(s) in RCA: 112] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2005] [Revised: 03/06/2006] [Accepted: 03/12/2006] [Indexed: 11/20/2022]
Abstract
Nerve injury can produce hypersensitivity to noxious and normally innocuous stimulation. Injury-induced central (i.e. spinal) sensitization is thought to arise from enhanced afferent input to the spinal cord and to be critical for expression of behavioral hypersensitivity. Descending facilitatory influences from the rostral ventromedial medulla have been suggested to also be critical for the maintenance, though not the initiation, of experimental neuropathic pain. The possibility that descending facilitation from the rostral ventromedial medulla is required for the maintenance of central sensitization was examined by determining whether ablation of mu-opioid receptor-expressing cells within the rostral ventromedial medulla prevented the enhanced expression of repetitive touch-evoked FOS within the spinal cord of animals with spinal nerve ligation injury as well as nerve injury-induced behavioral hypersensitivity. Rats received a single microinjection of vehicle, saporin, dermorphin or dermorphin-saporin into the rostral ventromedial medulla and 28 days later, underwent either sham or spinal nerve ligation procedures. Animals receiving rostral ventromedial medulla pretreatment with vehicle, dermorphin or saporin that were subjected to spinal nerve ligation demonstrated both thermal and tactile hypersensitivity, and showed significantly increased expression of touch-evoked FOS in the dorsal horn ipsilateral to nerve injury compared with sham-operated controls at days 3, 5 or 10 post-spinal nerve ligation. In contrast, nerve-injured animals pretreated with dermorphin-saporin showed enhanced behaviors and touch-evoked FOS expression in the spinal dorsal horn at day 3, but not days 5 and 10, post-spinal nerve ligation when compared with sham-operated controls. These results indicate the presence of nerve injury-induced behavioral hypersensitivity associated with nerve injury-induced central sensitization. Further, the results demonstrate the novel concept that once initiated, maintenance of nerve injury-induced central sensitization in the spinal dorsal horn requires descending pain facilitation mechanisms arising from the rostral ventromedial medulla.
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Affiliation(s)
- L P Vera-Portocarrero
- Department of Pharmacology, University of Arizona, Health Sciences Center, 1501 North Campbell Avenue, Tucson, AZ 85724, USA
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Xie JY, Liu MF, Hu QH. [Experimental study on effect of kang ai-bao II to cancer cells with cell CT analysis in mice]. Zhongguo Zhong Xi Yi Jie He Za Zhi 1995; 15:293-5. [PMID: 7640505] [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: 01/26/2023]
Abstract
The result of the experiment indicated that Kang Ai-bao II ([symbol: see text] II) had a destructive effect on DNA and RNA of cancer cells. Our study provided the basis for the clinical practice. The effect of Kang Ai-bao II on U14 cancer cell in C57 BL mice was investigated with confocal laser scanning microscopy.
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MESH Headings
- Animals
- Antineoplastic Agents, Phytogenic/pharmacology
- DNA Damage
- DNA, Neoplasm/drug effects
- Drugs, Chinese Herbal/pharmacology
- Garlic
- Male
- Mice
- Mice, Inbred C57BL
- Microscopy, Confocal
- Neoplasms, Experimental/genetics
- Neoplasms, Experimental/pathology
- Plants, Medicinal
- RNA, Neoplasm/drug effects
- Tumor Cells, Cultured
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Affiliation(s)
- J Y Xie
- Inst. of Basic Theory of TCM, China Academy of TCM, Beijing
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16
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Gao YM, Xie JY, Piao YJ. [Ultrastructural observation of intratumoral neutrophils and macrophages induced by garlic oil]. Zhongguo Zhong Xi Yi Jie He Za Zhi 1993; 13:546-8, 518. [PMID: 8111215] [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: 01/28/2023]
Abstract
After injection of garlic oil in tumor focus a large amount of neutrophils, macrophages and lymphocytes appeared. Some neutrophils and macrophages located adjacent to the tumor cells, some processes of neutrophils and macrophages penetrated into intracellular body of tumor cells. This result showed that garlic oil could induce neutrophils and macrophages against tumor.
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Affiliation(s)
- Y M Gao
- General Hospital of Air Force, PLA, Beijing
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17
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Xie JY, Gao YM, Shen LC. [Flow cytometric analysis of the garlic oil effect on DNA content of cancer cell cycle]. Zhongguo Zhong Xi Yi Jie He Za Zhi 1992; 12:92-4, 69-70. [PMID: 1498535] [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: 12/27/2022]
Abstract
Flow cytometry (FCM) is a new technique developed in the recent decade. This technique may measure DNA content of 5000 cells per second and trace the dynamic changes in cell proliferation cycle and offer a hint for designing clinical treatment protocol, monitor prognosis and elucidate the mechanisms of antitumor drugs. The authors previous studies showed significant effect of garlic oil on prolongation of life expectancy and inhibition of tumor growth in mice. Using FCM the authors analysed the effect of garlic oil on cell cycle in S180 tumor cells, 2-6 hrs after single administration or multiple administration the cell number in S phase rapidly decreased, in G1 phase increased. This suggests garlic oil may blockade cells to progress from G1 phase to S phase and result in accumulation of cells in G1 phase and directly inhibit the synthesis of DNA and the cell cycle. Theoretical basis for clinical application was offered and some aspects of antitumor mechanism of garlic oil were elucidated.
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Affiliation(s)
- J Y Xie
- Institute of Basic Theory of TCM, China Academy of TCM, Beijing
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18
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Wang C, Zhou JA, Xie JY, Zhou JL, Guan HP. Circulatory effects of anisodamine on cardiopulmonary bypass. Thorac Cardiovasc Surg 1988; 36:141-5. [PMID: 3212770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Anisodamine, a new M-cholinergic blocker discovered in China, was employed in experimental dogs on cardiopulmonary bypass (CPB) with a view to observing its hypotensive activities. Before bypass an intravenous bolus injection of anisodamine 5 mg/kg caused a transient fall of about 20 mmHg in arterial blood pressure for 10 to 15 minutes, with an increase of about 10 mmHg in pulse pressure, indicating lowering afterload. During bypass, a continuous intravenous drip of anisodamine brought about 27 to 37 mmHg fall in perfusion pressure (compared with the control group) while the perfusion flow rate was kept constant. Beneficial effects of anisodamine were manifested, post-bypass, by enhancement of cardiac output, lack of elevation of pulmonary arterial pressure, a speedy recovery of the ST segment to normal, and a decrease of the rate-pressure product, as results of circulatory improvement and myocardial protection.
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Affiliation(s)
- C Wang
- Department of Cardiac Surgery, Union Hospital, Tongji Medical University, Wuhan, Hubei, China
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19
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Xie JY. [Tween 80 egg medium for isolation of mycobacteria]. Zhonghua Jie He He Hu Xi Za Zhi 1987; 10:281-2, 309. [PMID: 3329978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Yang SH, Xie JY. [Treatment of acute hemorrhagic necrotizing pancreatitis with necrosectomy and peritoneal irrigation]. Zhonghua Wai Ke Za Zhi 1985; 23:719-20, 781. [PMID: 3830662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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21
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Xie JY, Tu GR. [Effect of radix Codonopsis pilosulae on cytochemical changes in macrophages]. Zhong Xi Yi Jie He Za Zhi 1985; 5:487-8, 453. [PMID: 2932254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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22
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Xie JY. [Diagnosis of myocardial injuries following open heart surgery]. Zhonghua Wai Ke Za Zhi 1983; 21:225-8. [PMID: 6617380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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