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Yu WH, Yuan X, Chen WY, Zhang T, Zhao G. [Analysis of 15 cases of trench foot in peacetime]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2023; 41:939-941. [PMID: 38195232 DOI: 10.3760/cma.j.cn121094-20221201-00567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 11/09/2023]
Abstract
Trench foot was first seen in World War Ⅰ and was one of the reasons for non combat attrition. We reviewed and analyzed 15 cases of trench foot admitted from 2010 to 2021, summarized clinical treatment methods and experiences, analyzed the causes, population characteristics, treatment methods, and treatment experiences of trench foot during peacetime, strengthened attention to high-risk groups, and improved the success rate of clinical treatment.
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Affiliation(s)
- W H Yu
- Peripheral Vascular Disease Department of the First Affiliated Hospital of Heilongjiang University of Traditional Chinese Medicine, Harbin 150040, China
| | - X Yuan
- Graduate School of Heilongjiang University of Traditional Chinese Medicine, Harbin 150040, China
| | - W Y Chen
- Graduate School of Heilongjiang University of Traditional Chinese Medicine, Harbin 150040, China
| | - T Zhang
- Graduate School of Heilongjiang University of Traditional Chinese Medicine, Harbin 150040, China
| | - G Zhao
- Peripheral Vascular Disease Department of the First Affiliated Hospital of Heilongjiang University of Traditional Chinese Medicine, Harbin 150040, China
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Chuang WY, Yu WH, Lee YC, Zhang QY, Chang H, Shih LY, Yeh CJ, Lin SMT, Chang SH, Ueng SH, Wang TH, Hsueh C, Kuo CF, Chuang SS, Yeh CY. Deep Learning-Based Nuclear Morphometry Reveals an Independent Prognostic Factor in Mantle Cell Lymphoma. Am J Pathol 2022; 192:1763-1778. [PMID: 36150505 DOI: 10.1016/j.ajpath.2022.08.006] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 07/18/2022] [Accepted: 08/15/2022] [Indexed: 06/16/2023]
Abstract
Blastoid/pleomorphic morphology is associated with short survival in mantle cell lymphoma (MCL), but its prognostic value is overridden by Ki-67 in multivariate analysis. Herein, a nuclear segmentation model was developed using deep learning, and nuclei of tumor cells in 103 MCL cases were automatically delineated. Eight nuclear morphometric attributes were extracted from each nucleus. The mean, variance, skewness, and kurtosis of each attribute were calculated for each case, resulting in 32 morphometric parameters. Compared with those in classic MCL, 17 morphometric parameters were significantly different in blastoid/pleomorphic MCL. Using univariate analysis, 16 morphometric parameters (including 14 significantly different between classic and blastoid/pleomorphic MCL) emerged as significant prognostic factors. Using multivariate analysis, Biologic MCL International Prognostic Index (bMIPI) risk group (P = 0.025), low skewness of nuclear irregularity (P = 0.020), and high mean of nuclear irregularity (P = 0.047) emerged as independent adverse prognostic factors. Additionally, a morphometric score calculated from the skewness and mean of nuclear irregularity (P = 0.0038) was an independent prognostic factor in addition to bMIPI risk group (P = 0.025), and a summed morphometric bMIPI score was useful for risk stratification of patients with MCL (P = 0.000001). These results demonstrate, for the first time, that a nuclear morphometric score is an independent prognostic factor in MCL. It is more robust than blastoid/pleomorphic morphology and can be objectively measured.
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Affiliation(s)
- Wen-Yu Chuang
- Department of Pathology, Chang Gung Memorial Hospital and Chang Gung University, Taoyuan, Taiwan; School of Medicine, Chang Gung University, Taoyuan, Taiwan; Chang Gung Molecular Medicine Research Center, Chang Gung University, Taoyuan, Taiwan; Center for Vascularized Composite Allotransplantation, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | | | - Yen-Chen Lee
- School of Medicine, Chang Gung University, Taoyuan, Taiwan
| | | | - Hung Chang
- School of Medicine, Chang Gung University, Taoyuan, Taiwan; Division of Hematology and Oncology, Department of Internal Medicine, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Lee-Yung Shih
- School of Medicine, Chang Gung University, Taoyuan, Taiwan; Division of Hematology and Oncology, Department of Internal Medicine, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Chi-Ju Yeh
- Department of Pathology, Chang Gung Memorial Hospital and Chang Gung University, Taoyuan, Taiwan; School of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Samuel Mu-Tse Lin
- aetherAI, Co, Ltd, Taipei, Taiwan; Taipei American School, Taipei, Taiwan
| | - Shang-Hung Chang
- School of Medicine, Chang Gung University, Taoyuan, Taiwan; Center for Big Data Analytics and Statistics, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Shir-Hwa Ueng
- Department of Pathology, Chang Gung Memorial Hospital and Chang Gung University, Taoyuan, Taiwan; School of Medicine, Chang Gung University, Taoyuan, Taiwan; Chang Gung Molecular Medicine Research Center, Chang Gung University, Taoyuan, Taiwan
| | - Tong-Hong Wang
- Tissue Bank, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Chuen Hsueh
- Department of Pathology, Chang Gung Memorial Hospital and Chang Gung University, Taoyuan, Taiwan; School of Medicine, Chang Gung University, Taoyuan, Taiwan; Chang Gung Molecular Medicine Research Center, Chang Gung University, Taoyuan, Taiwan
| | - Chang-Fu Kuo
- School of Medicine, Chang Gung University, Taoyuan, Taiwan; Center for Artificial Intelligence in Medicine, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Shih-Sung Chuang
- Department of Pathology, Chi-Mei Medical Center, Tainan, Taiwan.
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Wang RC, Chen BJ, Yuan CT, Ho CH, Chuang WY, Chen SW, Chang JH, Yu WH, Chuang SS. The spectrum of intestinal mature T- and NK-cell neoplasms in a tertiary center in Taiwan with a high frequency of perforation. Pathol Res Pract 2022; 240:154184. [PMID: 36327820 DOI: 10.1016/j.prp.2022.154184] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 09/30/2022] [Accepted: 10/17/2022] [Indexed: 11/06/2022]
Abstract
Primary intestinal T-cell lymphomas (PITLs) comprise enteropathy-associated T-cell lymphoma (EATL), monomorphic epitheliotropic intestinal T-cell lymphoma (MEITL), extranodal NK/T-cell lymphoma (ENKTL), anaplastic large cell lymphoma (ALCL), and intestinal T cell lymphoma, NOS (ITCL-NOS). MEITL is composed of monomorphic medium cells expressing CD8 and CD56, with a cytotoxic phenotype. We retrospectively analyzed 77 cases of intestinal T-cell lymphomas, 71 primary and six secondary, at a tertiary center in Taiwan from 2001 to 2021. Perforation occurred in 57 (74%) patients, including 56 (73%) at presentation and one after chemotherapy. The primary cases included MEITL (68%), ENKTL (14%), ITCL-NOS (13%), ALCL (4%), and EATL (1%). The perforation rate was 90%, 70%, and 22% in MEITL, ENKTL, and ITCL-NOS cases, respectively (p < 0.0001, Fisher's exact test). Most (75%; n = 36) MEITL cases were typical; while seven (15%) had atypical morphology and five (10%) exhibited atypical immunophenotype. The tumor cells of ITCL-NOS were pleomorphic, with various expression of CD8 or CD56. All METIL, ITCL-NOS and ALCL cases were negative for EBER; while all ENKTL cases, either primary or secondary, were positive for cytotoxic granules and EBER. The prognosis of PITL was poor, with a medium survival of 7.0, 3.3, and 3.7 months among patients with MEITL, ENKTL, and ITCL-NOS, respectively. Of the six secondary cases, the primary tumors orginated from nasal ENKTL (n = 5) and cutaneous PTCL-NOS (n = 1). We showed a wide spectrum of intestinal T-cell lymphomas in Taiwan, with MEITL as the most common PITL, a high rate of perforation, and a wider morphological and immunophenotypic spectrum.
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Affiliation(s)
- Ren Ching Wang
- Department of Pathology, China Medical University Hospital and Department of Nursing, College of Nursing, HungKuang University, Taichung, Taiwan
| | - Bo-Jung Chen
- Department of Pathology, Shuang Ho Hospital, Taipei Medical University, New Taipei City and Department of Pathology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Chang-Tsu Yuan
- Department of Pathology, National Taiwan University Cancer Center, Taipei, Graduate Institute of Clinical Medicine, National Taiwan University, Taipei, and Departments of Pathology, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Chung-Han Ho
- Department of Medical Research, Chi-Mei Medical Center, Tainan, and Department of Information Management, Southern Taiwan University of Science and Technology, Tainan, Taiwan
| | - Wen-Yu Chuang
- Department of Pathology, Chang Gung Memorial Hospital and Chang Gung University; School of Medicine and Chang Gung Molecular Medicine Research Center, Chang Gung University, Taoyuan, Taiwan
| | - Shang-Wen Chen
- Division of Hemato-Oncology, Department of Internal Medicine, Chi-Mei Medical Center, Lioying, Tainan, Taiwan
| | | | | | - Shih-Sung Chuang
- Department of Pathology, Chi-Mei Medical Center, Tainan, Taiwan.
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Zhao H, Luo D, Yang JJ, Yuan MJ, Liu L, Yu WH. [Clinical effect and analysis of exercise treatment for temporomandibular joint osteoarthritis]. Zhonghua Kou Qiang Yi Xue Za Zhi 2022; 57:701-707. [PMID: 35790509 DOI: 10.3760/cma.j.cn112144-20220314-00109] [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: 06/15/2023]
Abstract
Objective: To explore the clinical efficacy of (stomatognathic system functional exercise(SSFE) in the treatment of temporomandibular joint osteoarthritis (TMJOA), and to provide reference for the clinical treatment of TMJOA. Methods: Choose between January 2020 and June 2020 in the Affiliated Hospital of Qingdao University of Temporomandibular Disorder (TMD) Clinics, pain in the temporomandibular joint (TMJ), limited openings for complained of symptoms of TMD patients, diagnosed by clinical examination and cone beam CT (CBCT) examination of TMJOA patients 60 patients (64 joints), including 20 males and 45 females, the age was (42.6±2.5) years (33-47 years old). The patients were randomly divided into the experimental group (30 cases, 34 joints) and the control group (30 cases, 30 joints) according to the odd and even numbers of their treatment numbers. The experimental group was treated with SSFE method. The control group was treated with maxillary full dentition occlusal splint. Visual analogue score (VAS), natural mouth opening and maximal mouth opening (MMO) of each patient in each group were recorded at initial diagnosis, 2 weeks, 3 and 6 months after treatment, and CBCT imaging was compared for the changes of condylar bone at initial diagnosis, 3 and 6 months after treatment. Results: VAS values of the experimental groups were (2.90±1.42), (0.90±0.37), (0.87±0.23) at 2 weeks, 3 and 6 months after treatment, respectively. The VAS values of the control group were (4.57±1.94), (4.17±2.09), (3.73±2.21), respectively. The VAS score of the experimental group was significantly lower than that of the control group (F=42.93, P<0.001). Before SSFE treatment, all the patients in the experimental group had different degrees of restricted opening and characteristic abnormal opening and closing pattern. Two weeks after SSFE treatment, the opening degree of the patients was (37.69±2.4)mm, the opening shape "↓" and the closing shape "↑" were normal. At 3 and 6 months after treatment, the oral opening was (38.98±1.08) mm and (39.73±1.76) mm, respectively. The opening degree of control group was (36.85±2.33) mm 2 weeks after treatment, and the characteristic abnormal opening and closing pattern still existed. The opening degree of control group was (37.82±1.85) mm and (37.40±1.75) mm 3 and 6 months after treatment, respectively. The characteristic abnormal opening and closing pattern (stuffy, awkward, deliberate, unnatural) did not improve significantly. The openness of the experimental group was significantly higher than that of the control group (F=25.20, P<0.001). In the experimental group, 82.4% (28/34) had benign remodeling of condylar bone 6 months after treatment, and 17.6% (6/34) had no change of condylar bone. There was no significant change in condylar bone in control group. CBCT scores of the experimental group were (2.43±1.74) and (1.70±1.26) at 3 and 6 months after treatment, respectively. CBCT scores of the control group at 3 and 6 months after treatment were (4.23±1.50) and (4.10±1.37), they were significantly lower in the experimental group than in the control group (F=27.20, P<0.001). Conclusions: Full dentition occlusal splint can alleviate the pain in the joint area of TMJOA patients, but can not improve the characteristic abnormal mandibular movement, and the condyle bone repair is not obvious. SSFE can effectively relieve the symptoms and signs of TMJOA patients, especially improve the abnormal characteristic mandibular movement, and promote the normal reconstruction and repair of condylar bone.
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Affiliation(s)
- H Zhao
- Department of Oral and Maxillofacial Surgery, The Affiliated Hospital of Qingdao University, Qingdao 266003, China
| | - D Luo
- Department of Oral and Maxillofacial Surgery, The Affiliated Hospital of Qingdao University, Qingdao 266003, China
| | - J J Yang
- Department of Oral and Maxillofacial Surgery, The Affiliated Hospital of Qingdao University, Qingdao 266003, China
| | - M J Yuan
- Department of Oral and Maxillofacial Surgery, The Affiliated Hospital of Qingdao University, Qingdao 266003, China
| | - L Liu
- Department of Oral and Maxillofacial Surgery, The Affiliated Hospital of Qingdao University, Qingdao 266003, China
| | - W H Yu
- Department of Oral and Maxillofacial Surgery, The Affiliated Hospital of Qingdao University, Qingdao 266003, China
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Yu WH, Liu L, Yang JJ, Zhao H, Li XT. [Feasibility analysis of immediate implant placement in the maxillary molar region]. Zhonghua Kou Qiang Yi Xue Za Zhi 2022; 57:251-257. [PMID: 35280002 DOI: 10.3760/cma.j.cn112144-20210324-00139] [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: 06/14/2023]
Abstract
Objective: To study the clinical outcomes and feasibility of immediate implantation after flap surgery and minimally invasive extraction in the maxillary molar area and to provide a reference for it. Methods: Forty-one patients (41 molars in total) with maxillary molars that could not be preserved, treated from June 2018 to June 2020 at the Department of Oral and Maxillofacial Surgery at the Affiliated Hospital of Qingdao University, were selected. There are 24 males and 17 females with the age of (49.7±1.8) years (range 18-66 years). Pre-operative cone-beam CT (CBCT) was taken for measurement and analysis. After flap surgery and minimally invasive tooth extraction, the inflammatory granulation tissues attached to the soft and hard tissues were completely scraped and clipped, followed by the preparation of the implants in the correct three-dimensional position. Torque value and implant stability quotient (ISQ) were recorded after implant placement and with non-submerged healing. CBCT examination was taken 6 months after surgery and ISQ value was checked before crown restoration. CBCT examination was also taken 1 year after the permanent restoration. The survival rate of 6 months after surgery, the success rate of 1 year after permanent restoration, and the size of jump gaps immediately after surgery, 6 months after surgery, 1 year after permanent restoration respectively, were performed. The ISQ values were compared immediately and 6 months after surgery. Results: A total of 41 implants were placed in 41 patients. Six months after surgery, the survival rate was 100% (41/41). Twelve months after permanent restoration, the success rate of the implant restoration was 100% (41/41). The torque value after implant implantation was (42.77±0.79) N·cm. The buccal and palatal jump gaps were (3.15±0.16) mm and (2.86±0.18) mm immediately after surgery, respectively. The mesial and distal jump gaps were (2.94±0.19) mm and (3.77±0.21) mm, respectively. CBCT showed that no jump gap around the implants at 6 months after surgery and 1 year after permanent restoration. The ISQ values at immediately and 6 months after surgery were (74.78±0.59) and (80.20±0.49) respectively, and the difference was statistically significant (t=-9.03, P<0.001). Conclusions: Immediate dental implantation in the correct three-dimensional position could achieve good osseointegration by means of flap surgery, minimally invasive extraction and thorough removal of inflammatory tissue on the surface of soft and hard tissues. The clinical outcomes were satisfactory.
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Affiliation(s)
- W H Yu
- Department of Oral and Maxillofacial Surgery, The Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - L Liu
- Department of Oral and Maxillofacial Surgery, The Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - J J Yang
- Department of Oral and Maxillofacial Surgery, The Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - H Zhao
- Department of Oral and Maxillofacial Surgery, The Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - X T Li
- Department of Oral and Maxillofacial Surgery, The Affiliated Hospital of Qingdao University, Qingdao 266000, China
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Chuang WY, Chen CC, Yu WH, Yeh CJ, Chang SH, Ueng SH, Wang TH, Hsueh C, Kuo CF, Yeh CY. Identification of nodal micrometastasis in colorectal cancer using deep learning on annotation-free whole-slide images. Mod Pathol 2021; 34:1901-1911. [PMID: 34103664 PMCID: PMC8443445 DOI: 10.1038/s41379-021-00838-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 05/11/2021] [Accepted: 05/12/2021] [Indexed: 01/17/2023]
Abstract
Detection of nodal micrometastasis (tumor size: 0.2-2.0 mm) is challenging for pathologists due to the small size of metastatic foci. Since lymph nodes with micrometastasis are counted as positive nodes, detecting micrometastasis is crucial for accurate pathologic staging of colorectal cancer. Previously, deep learning algorithms developed with manually annotated images performed well in identifying micrometastasis of breast cancer in sentinel lymph nodes. However, the process of manual annotation is labor intensive and time consuming. Multiple instance learning was later used to identify metastatic breast cancer without manual annotation, but its performance appears worse in detecting micrometastasis. Here, we developed a deep learning model using whole-slide images of regional lymph nodes of colorectal cancer with only a slide-level label (either a positive or negative slide). The training, validation, and testing sets included 1963, 219, and 1000 slides, respectively. A supercomputer TAIWANIA 2 was used to train a deep learning model to identify metastasis. At slide level, our algorithm performed well in identifying both macrometastasis (tumor size > 2.0 mm) and micrometastasis with an area under the receiver operating characteristics curve (AUC) of 0.9993 and 0.9956, respectively. Since most of our slides had more than one lymph node, we then tested the performance of our algorithm on 538 single-lymph node images randomly cropped from the testing set. At single-lymph node level, our algorithm maintained good performance in identifying macrometastasis and micrometastasis with an AUC of 0.9944 and 0.9476, respectively. Visualization using class activation mapping confirmed that our model identified nodal metastasis based on areas of tumor cells. Our results demonstrate for the first time that micrometastasis could be detected by deep learning on whole-slide images without manual annotation.
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Affiliation(s)
- Wen-Yu Chuang
- Department of Pathology, Chang Gung Memorial Hospital and Chang Gung University, Taoyuan, Taiwan
| | | | | | - Chi-Ju Yeh
- Department of Pathology, Chang Gung Memorial Hospital and Chang Gung University, Taoyuan, Taiwan
| | - Shang-Hung Chang
- Center for Big Data Analytics and Statistics, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Shir-Hwa Ueng
- Department of Pathology, Chang Gung Memorial Hospital and Chang Gung University, Taoyuan, Taiwan
- Chang Gung Molecular Medicine Research Center, Chang Gung University, Taoyuan, Taiwan
| | - Tong-Hong Wang
- Tissue Bank, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Chuen Hsueh
- Department of Pathology, Chang Gung Memorial Hospital and Chang Gung University, Taoyuan, Taiwan
| | - Chang-Fu Kuo
- Center for Artificial Intelligence in Medicine, Chang Gung Memorial Hospital, Taoyuan, Taiwan
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Chen CL, Chen CC, Yu WH, Chen SH, Chang YC, Hsu TI, Hsiao M, Yeh CY, Chen CY. An annotation-free whole-slide training approach to pathological classification of lung cancer types using deep learning. Nat Commun 2021; 12:1193. [PMID: 33608558 PMCID: PMC7896045 DOI: 10.1038/s41467-021-21467-y] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 01/25/2021] [Indexed: 12/18/2022] Open
Abstract
Deep learning for digital pathology is hindered by the extremely high spatial resolution of whole-slide images (WSIs). Most studies have employed patch-based methods, which often require detailed annotation of image patches. This typically involves laborious free-hand contouring on WSIs. To alleviate the burden of such contouring and obtain benefits from scaling up training with numerous WSIs, we develop a method for training neural networks on entire WSIs using only slide-level diagnoses. Our method leverages the unified memory mechanism to overcome the memory constraint of compute accelerators. Experiments conducted on a data set of 9662 lung cancer WSIs reveal that the proposed method achieves areas under the receiver operating characteristic curve of 0.9594 and 0.9414 for adenocarcinoma and squamous cell carcinoma classification on the testing set, respectively. Furthermore, the method demonstrates higher classification performance than multiple-instance learning as well as strong localization results for small lesions through class activation mapping.
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Affiliation(s)
- Chi-Long Chen
- Department of Pathology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Department of Pathology, Taipei Medical University Hospital, Taipei, Taiwan
- Research Center for Artificial Intelligence in Medicine, Taipei Medical University, Taipei, Taiwan
| | | | | | | | - Yu-Chan Chang
- Department of Biomedical Imaging and Radiological Sciences, National Yang-Ming University, Taipei, Taiwan
| | - Tai-I Hsu
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
| | - Michael Hsiao
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
| | | | - Cheng-Yu Chen
- Department of Radiology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.
- Department of Radiology, Taipei Medical University Hospital, Taipei, Taiwan.
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Yeh JCY, Yu WH, Yang CK, Chien LI, Lin KH, Huang WS, Hsu PK. Predicting aggressive histopathological features in esophageal cancer with positron emission tomography using a deep convolutional neural network. Ann Transl Med 2021; 9:37. [PMID: 33553330 PMCID: PMC7859760 DOI: 10.21037/atm-20-1419] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Background The presence of lymphovascular invasion (LVI) and perineural invasion (PNI) are of great prognostic importance in esophageal squamous cell carcinoma. Currently, positron emission tomography (PET) scans are the only means of functional assessment prior to treatment. We aimed to predict the presence of LVI and PNI in esophageal squamous cell carcinoma using PET imaging data by training a three-dimensional convolution neural network (3D-CNN). Methods Seven hundred and ninety-eight PET scans of patients with esophageal squamous cell carcinoma and 309 PET scans of patients with stage I lung cancer were collected. In the first part of this study, we built a 3D-CNN based on a residual network, ResNet, for a task to classify the scans into esophageal cancer or lung cancer. In the second stage, we collected the PET scans of 278 patients undergoing esophagectomy for a task to classify and predict the presence of LVI/PNI. Results In the first part, the model performance attained an area under the receiver operating characteristic curve (AUC) of 0.860. In the second part, we randomly split 80%, 10%, and 10% of our dataset into training set, validation set and testing set, respectively, for a task to classify the scans into the presence of LVI/PNI and evaluated the model performance on the testing set. Our 3D-CNN model attained an AUC of 0.668 in the testing set, which shows a better discriminative ability than random guessing. Conclusions A 3D-CNN can be trained, using PET imaging datasets, to predict LNV/PNI in esophageal cancer with acceptable accuracy.
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Affiliation(s)
| | | | | | - Ling-I Chien
- Department of Nursing, Taipei Veterans General Hospital, Taipei
| | - Ko-Han Lin
- Department of Nuclear Medicine, Taipei Veterans General Hospital, Taipei
| | - Wen-Sheng Huang
- Department of Nuclear Medicine, Taipei Veterans General Hospital, Taipei
| | - Po-Kuei Hsu
- Division of Thoracic Surgery, Department of Surgery, Taipei Veterans General Hospital and School of Medicine, National Yang-Ming University, Taipei
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Kumar N, Verma R, Anand D, Zhou Y, Onder OF, Tsougenis E, Chen H, Heng PA, Li J, Hu Z, Wang Y, Koohbanani NA, Jahanifar M, Tajeddin NZ, Gooya A, Rajpoot N, Ren X, Zhou S, Wang Q, Shen D, Yang CK, Weng CH, Yu WH, Yeh CY, Yang S, Xu S, Yeung PH, Sun P, Mahbod A, Schaefer G, Ellinger I, Ecker R, Smedby O, Wang C, Chidester B, Ton TV, Tran MT, Ma J, Do MN, Graham S, Vu QD, Kwak JT, Gunda A, Chunduri R, Hu C, Zhou X, Lotfi D, Safdari R, Kascenas A, O'Neil A, Eschweiler D, Stegmaier J, Cui Y, Yin B, Chen K, Tian X, Gruening P, Barth E, Arbel E, Remer I, Ben-Dor A, Sirazitdinova E, Kohl M, Braunewell S, Li Y, Xie X, Shen L, Ma J, Baksi KD, Khan MA, Choo J, Colomer A, Naranjo V, Pei L, Iftekharuddin KM, Roy K, Bhattacharjee D, Pedraza A, Bueno MG, Devanathan S, Radhakrishnan S, Koduganty P, Wu Z, Cai G, Liu X, Wang Y, Sethi A. A Multi-Organ Nucleus Segmentation Challenge. IEEE Trans Med Imaging 2020; 39:1380-1391. [PMID: 31647422 PMCID: PMC10439521 DOI: 10.1109/tmi.2019.2947628] [Citation(s) in RCA: 117] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Generalized nucleus segmentation techniques can contribute greatly to reducing the time to develop and validate visual biomarkers for new digital pathology datasets. We summarize the results of MoNuSeg 2018 Challenge whose objective was to develop generalizable nuclei segmentation techniques in digital pathology. The challenge was an official satellite event of the MICCAI 2018 conference in which 32 teams with more than 80 participants from geographically diverse institutes participated. Contestants were given a training set with 30 images from seven organs with annotations of 21,623 individual nuclei. A test dataset with 14 images taken from seven organs, including two organs that did not appear in the training set was released without annotations. Entries were evaluated based on average aggregated Jaccard index (AJI) on the test set to prioritize accurate instance segmentation as opposed to mere semantic segmentation. More than half the teams that completed the challenge outperformed a previous baseline. Among the trends observed that contributed to increased accuracy were the use of color normalization as well as heavy data augmentation. Additionally, fully convolutional networks inspired by variants of U-Net, FCN, and Mask-RCNN were popularly used, typically based on ResNet or VGG base architectures. Watershed segmentation on predicted semantic segmentation maps was a popular post-processing strategy. Several of the top techniques compared favorably to an individual human annotator and can be used with confidence for nuclear morphometrics.
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Chuang WY, Chang SH, Yu WH, Yang CK, Yeh CJ, Ueng SH, Liu YJ, Chen TD, Chen KH, Hsieh YY, Hsia Y, Wang TH, Hsueh C, Kuo CF, Yeh CY. Successful Identification of Nasopharyngeal Carcinoma in Nasopharyngeal Biopsies Using Deep Learning. Cancers (Basel) 2020; 12:cancers12020507. [PMID: 32098314 PMCID: PMC7072217 DOI: 10.3390/cancers12020507] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 02/16/2020] [Accepted: 02/19/2020] [Indexed: 12/14/2022] Open
Abstract
Pathologic diagnosis of nasopharyngeal carcinoma (NPC) can be challenging since most cases are nonkeratinizing carcinoma with little differentiation and many admixed lymphocytes. Our aim was to evaluate the possibility to identify NPC in nasopharyngeal biopsies using deep learning. A total of 726 nasopharyngeal biopsies were included. Among them, 100 cases were randomly selected as the testing set, 20 cases as the validation set, and all other 606 cases as the training set. All three datasets had equal numbers of NPC cases and benign cases. Manual annotation was performed. Cropped square image patches of 256 × 256 pixels were used for patch-level training, validation, and testing. The final patch-level algorithm effectively identified NPC patches, with an area under the receiver operator characteristic curve (AUC) of 0.9900. Using gradient-weighted class activation mapping, we demonstrated that the identification of NPC patches was based on morphologic features of tumor cells. At the second stage, whole-slide images were sequentially cropped into patches, inferred with the patch-level algorithm, and reconstructed into images with a smaller size for training, validation, and testing. Finally, the AUC was 0.9848 for slide-level identification of NPC. Our result shows for the first time that deep learning algorithms can identify NPC.
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Affiliation(s)
- Wen-Yu Chuang
- Department of Pathology, Chang Gung Memorial Hospital and Chang Gung University, No. 5, Fuxing Street, Guishan District, Taoyuan City 333, Taiwan; (W.-Y.C.); (C.-J.Y.); (S.-H.U.); (Y.-J.L.); (T.-D.C.); (K.-H.C.); (Y.-Y.H.); (Y.H.); (C.H.)
- Center for Vascularized Composite Allotransplantation, Chang Gung Memorial Hospital, No. 5, Fuxing Street, Guishan District, Taoyuan City 333, Taiwan
| | - Shang-Hung Chang
- Center for Big Data Analytics and Statistics, Chang Gung Memorial Hospital, No. 5, Fuxing Street, Guishan District, Taoyuan City 333, Taiwan;
| | - Wei-Hsiang Yu
- aetherAI, Co., Ltd., No. 3-2, Yuan-Qu Street, Nangang District, Taipei City 115, Taiwan; (W.-H.Y.); (C.-K.Y.)
| | - Cheng-Kun Yang
- aetherAI, Co., Ltd., No. 3-2, Yuan-Qu Street, Nangang District, Taipei City 115, Taiwan; (W.-H.Y.); (C.-K.Y.)
| | - Chi-Ju Yeh
- Department of Pathology, Chang Gung Memorial Hospital and Chang Gung University, No. 5, Fuxing Street, Guishan District, Taoyuan City 333, Taiwan; (W.-Y.C.); (C.-J.Y.); (S.-H.U.); (Y.-J.L.); (T.-D.C.); (K.-H.C.); (Y.-Y.H.); (Y.H.); (C.H.)
| | - Shir-Hwa Ueng
- Department of Pathology, Chang Gung Memorial Hospital and Chang Gung University, No. 5, Fuxing Street, Guishan District, Taoyuan City 333, Taiwan; (W.-Y.C.); (C.-J.Y.); (S.-H.U.); (Y.-J.L.); (T.-D.C.); (K.-H.C.); (Y.-Y.H.); (Y.H.); (C.H.)
- Chang Gung Molecular Medicine Research Center, Chang Gung University, No. 259, Wenhua First Road, Guishan District, Taoyuan City 333, Taiwan
| | - Yu-Jen Liu
- Department of Pathology, Chang Gung Memorial Hospital and Chang Gung University, No. 5, Fuxing Street, Guishan District, Taoyuan City 333, Taiwan; (W.-Y.C.); (C.-J.Y.); (S.-H.U.); (Y.-J.L.); (T.-D.C.); (K.-H.C.); (Y.-Y.H.); (Y.H.); (C.H.)
| | - Tai-Di Chen
- Department of Pathology, Chang Gung Memorial Hospital and Chang Gung University, No. 5, Fuxing Street, Guishan District, Taoyuan City 333, Taiwan; (W.-Y.C.); (C.-J.Y.); (S.-H.U.); (Y.-J.L.); (T.-D.C.); (K.-H.C.); (Y.-Y.H.); (Y.H.); (C.H.)
| | - Kuang-Hua Chen
- Department of Pathology, Chang Gung Memorial Hospital and Chang Gung University, No. 5, Fuxing Street, Guishan District, Taoyuan City 333, Taiwan; (W.-Y.C.); (C.-J.Y.); (S.-H.U.); (Y.-J.L.); (T.-D.C.); (K.-H.C.); (Y.-Y.H.); (Y.H.); (C.H.)
| | - Yi-Yin Hsieh
- Department of Pathology, Chang Gung Memorial Hospital and Chang Gung University, No. 5, Fuxing Street, Guishan District, Taoyuan City 333, Taiwan; (W.-Y.C.); (C.-J.Y.); (S.-H.U.); (Y.-J.L.); (T.-D.C.); (K.-H.C.); (Y.-Y.H.); (Y.H.); (C.H.)
| | - Yi Hsia
- Department of Pathology, Chang Gung Memorial Hospital and Chang Gung University, No. 5, Fuxing Street, Guishan District, Taoyuan City 333, Taiwan; (W.-Y.C.); (C.-J.Y.); (S.-H.U.); (Y.-J.L.); (T.-D.C.); (K.-H.C.); (Y.-Y.H.); (Y.H.); (C.H.)
- Department of Pathology, MacKay Memorial Hospital, No. 92, Section 2, Zhongshan North Road, Zhongshan District, Taipei City 104, Taiwan
| | - Tong-Hong Wang
- Tissue Bank, Chang Gung Memorial Hospital, No. 5, Fuxing Street, Guishan District, Taoyuan City 333, Taiwan;
| | - Chuen Hsueh
- Department of Pathology, Chang Gung Memorial Hospital and Chang Gung University, No. 5, Fuxing Street, Guishan District, Taoyuan City 333, Taiwan; (W.-Y.C.); (C.-J.Y.); (S.-H.U.); (Y.-J.L.); (T.-D.C.); (K.-H.C.); (Y.-Y.H.); (Y.H.); (C.H.)
- Chang Gung Molecular Medicine Research Center, Chang Gung University, No. 259, Wenhua First Road, Guishan District, Taoyuan City 333, Taiwan
| | - Chang-Fu Kuo
- Center for Artificial Intelligence in Medicine, Chang Gung Memorial Hospital, No. 5, Fuxing Street, Guishan District, Taoyuan City 333, Taiwan;
| | - Chao-Yuan Yeh
- aetherAI, Co., Ltd., No. 3-2, Yuan-Qu Street, Nangang District, Taipei City 115, Taiwan; (W.-H.Y.); (C.-K.Y.)
- Correspondence: ; Tel.: +886-2-27856892
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Yang CK, Yeh JCY, Yu WH, Chien LI, Lin KH, Huang WS, Hsu PK. Deep Convolutional Neural Network-Based Positron Emission Tomography Analysis Predicts Esophageal Cancer Outcome. J Clin Med 2019; 8:jcm8060844. [PMID: 31200519 PMCID: PMC6616908 DOI: 10.3390/jcm8060844] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 06/11/2019] [Accepted: 06/12/2019] [Indexed: 02/06/2023] Open
Abstract
In esophageal cancer, few prediction tools can be confidently used in current clinical practice. We developed a deep convolutional neural network (CNN) with 798 positron emission tomography (PET) scans of esophageal squamous cell carcinoma and 309 PET scans of stage I lung cancer. In the first stage, we pretrained a 3D-CNN with all PET scans for a task to classify the scans into esophageal cancer or lung cancer. Overall, 548 of 798 PET scans of esophageal cancer patients were included in the second stage with an aim to classify patients who expired within or survived more than one year after diagnosis. The area under the receiver operating characteristic curve (AUC) was used to evaluate model performance. In the pretrain model, the deep CNN attained an AUC of 0.738 in identifying patients who expired within one year after diagnosis. In the survival analysis, patients who were predicted to be expired but were alive at one year after diagnosis had a 5-year survival rate of 32.6%, which was significantly worse than the 5-year survival rate of the patients who were predicted to survive and were alive at one year after diagnosis (50.5%, p < 0.001). These results suggest that the prediction model could identify tumors with more aggressive behavior. In the multivariable analysis, the prediction result remained an independent prognostic factor (hazard ratio: 2.830; 95% confidence interval: 2.252–3.555, p < 0.001). We conclude that a 3D-CNN can be trained with PET image datasets to predict esophageal cancer outcome with acceptable accuracy.
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Affiliation(s)
| | | | | | - Ling-I Chien
- Department of Nursing, Taipei Veterans General Hospital, Taipei 112, Taiwan.
| | - Ko-Han Lin
- Department of Nuclear Medicine, Taipei Veterans General Hospital, Taipei 112, Taiwan.
| | - Wen-Sheng Huang
- Department of Nuclear Medicine, Taipei Veterans General Hospital, Taipei 112, Taiwan.
| | - Po-Kuei Hsu
- Division of Thoracic Surgery, Department of Surgery, Taipei Veterans General Hospital and School of Medicine, National Yang-Ming University, Taipei 112, Taiwan.
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12
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Cai DC, Pan C, Yu WH, Dang SS, Li J, Wu SM, Jiang N, Wang MR, Zhang ZH, Lin F, Xin SJ, Yang YF, Shen BS, Ren H. [Clinical effect and safety of 144-week treatment with entecavir capsules in treatment-naïve HBeAg-positive patients with chronic hepatitis B]. Zhonghua Gan Zang Bing Za Zhi 2019; 25:597-600. [PMID: 29056009 DOI: 10.3760/cma.j.issn.1007-3418.2017.08.008] [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 investigate the clinical effect and safety of entecavir capsules in the treatment of treatment-naïve HBeAg-positive patients with chronic hepatitis B (CHB). Methods: A total of 158 HBeAg-positive CHB patients were given oral entecavir capsules at a dose of 0.5 mg/time once a day for 144 weeks. Clinical outcome and safety were evaluated at baseline and at 24, 48, 72, 96, 120, and 144 weeks of treatment respectively. The Fisher's exact test was used for the analysis of categorical data. Results: After 144 weeks of treatment, 90.91% of all patients achieved virologic response (< 69 IU/ml), the normalization rate of alanine aminotransferase was 88.18%, the clearance rate of HBeAg was 33.33%, and the seroconversion rate of HBeAg was 24.07%. Of all patients, 2 dropped out due to adverse events and 5 experienced serious adverse reactions. Conclusion: Entecavir capsules can inhibit viral replication and have good safety in treatment-naïve HBeAg-positive CHB patients.
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Affiliation(s)
- D C Cai
- The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - C Pan
- Mengchao Hepatobiliary Hospital of Fujian Medical University, Fuzhou 350000, China
| | - W H Yu
- The Eighth People's Hospital of Guangzhou, Guangzhou 510060, China
| | - S S Dang
- The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, China
| | - J Li
- The Second People's Hospital of Tianjin, Tianjin 300192, China
| | - S M Wu
- Shanghai Public Health Clinical Center, Shanghai 201508, China
| | - N Jiang
- Sichuan Provincial People's Hospital, Chengdu 610772, China
| | - M R Wang
- No.81 Hospital of PLA, Nanjing 210002, China
| | - Z H Zhang
- Jinan Infectious Disease Hospital, Jinan 250021, China
| | - F Lin
- Hainan General Hospital, Haikou 570311, China
| | - S J Xin
- No.302 Hospital of PLA, Beijing 100039, China
| | - Y F Yang
- The Second Hospital of Nanjing, Nanjing 210003, China
| | - B S Shen
- The First Affiliated Hospital of Xinxiang Medical University, Xinxiang 453100, China
| | - H Ren
- The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
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13
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Zhang Y, Niu M, Li Y, Wang J, Qu B, Zheng CX, Huang P, Yu WH. [Prevalence and risk factors of diabetic retinopathy in hospital patients]. Zhonghua Yi Xue Za Zhi 2018; 98:440-444. [PMID: 29429256 DOI: 10.3760/cma.j.issn.0376-2491.2018.06.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To analyze the prevalence and risk factors of diabetic retinopathy (DR) in ophthalmic patients. Methods: A cross-sectional study was performed. Diabetic patients who were admitted to Department of Ophthalmology, Traditional Chinese Medicine Hospital of Muping between October 2012 and June 2013 were included. General information and medical history were obtained from each subject by questionaires. Laboratory and detailed ophthalmic examinations were performed during the study. DR was diagnosed and graded by mydriatic fundus photography. Prevalence of DR was calculated and logistic regression was used to analyze the relationship between DR and various factors. Results: A total of 676 diabetic patients were included, and 455 of them presented with DR at a morbidity rate of 67.31%. Among DR patients, the number of mild, moderate, severe non-proliferative diabetic retinopathy (NPDR) patients and proliferative diabetic retinopathy (PDR) patients were 211 (46.37%), 167 (36.70%), 57 (12.53%) and 20 (4.40%), respectively. There was no significant difference in the prevalence of DR among different age groups (χ(2)=6.527, P=0.089). However, there was a significant difference between different disease duration groups (χ(2)=39.401, P<0.001), as well as between insulin therapy group and non-insulin therapy group (χ(2)=7.378, P=0.007). The multivariate logistic regression analysis demonstrated the independent risk factors for DR occurrence were hemoglobin A1c (HbA1c) (OR=1.131, 95%CI: 1.022-1.252, P=0.011) and duration of diabetes (OR=1.077, 95%CI: 1.046-1.108, P<0.001). Conclusions: The prevalence of DR in ophthalmic patients was associated with duration of diabetes, HbA1c, obesity, smoke, nephropaty and insulin therapy. Increased HbA1c level and longer duration of diabetes were independent risk factors for DR in diabetic patients.
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Affiliation(s)
- Y Zhang
- Department of Ophthalmology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
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14
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Yang CL, Sun YH, Yu WH, Yin XZ, Weng J, Feng B, Feng B. RETRACTED: Modulation of macrophage phenotype through controlled release of interleukin-4 from gelatine coatings on titanium surfaces. Eur Cell Mater 2018; 36:15-29. [PMID: 30047980 DOI: 10.22203/ecm.v036a02] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Pro-inflammatory phenotype (M1) macrophages initiate angiogenesis, while their prolonged activation can induce chronic inflammation. Anti-inflammatory phenotype (M2) macrophages promote vessel maturation and tissue regeneration. Biomaterials which can promote M2 polarisation after appropriate inflammation should enhance angiogenesis and wound healing. Herein, Interleukin-4 (IL-4), an anti-inflammatory cytokine, was adsorbed onto a titanium surface. Then, a genipin cross-linked gelatine hydrogel was coated onto the surface to delay IL-4 release. The cross-linking degree of the hydrogel was modulated by the different amount of genipin to control release of IL-4. When 0.7 wt% (weight %) genipin was used as a cross-linker, the sample (GG07-I) released less IL-4 within the first several days, followed by a sustained release time to 14 d. Meanwhile, the release rate of IL-4 in GG07-I reached a peak between 3 d and 7 d. In culture with macrophages in vitro, GG07-I and GG07 exhibited good cytocompatibility. The phenotypical switch of macrophages stimulated by the samples was determined by FACS, ELISA and PCR. Macrophages cultured with GG07-I, GG07 and PT were firstly activated to the M1 phenotype by interferon-gamma (IFN-γ). Then, due to the release of IL-4 in 5 to 7 d, GG07-I enhanced CD206, increased the secretion and gene expression of M2 marker, such as interleukin-10 (IL-10), arginase-1 (ARG-1) and platelet derived growth factor-BB (PDGF- BB). GG07-I prompted the switch from M1 to M2 phenotype. Those appropriate secretion of cytokines would benefit both vascularisation and osseointegration. Thus, the biomaterial directing inflammatory reaction has good prospects for clinical treatments.
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Affiliation(s)
| | | | | | | | | | - B Feng
- Key Laboratory of Advanced Technology for Materials (Ministry of Education), School of Materials Science and Engineering, University of the Southwest Jiaotong University, Jinniu District, Chengdu,
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15
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Yu WH, He SC, Du RJ, Zhu HD, Fang W, Li SS, Sun FH. [Oblique puncture approach via anterolateral to C2: a study of imaging anatomy on corpses]. Zhonghua Yi Xue Za Zhi 2017; 97:2913-2917. [PMID: 29050161 DOI: 10.3760/cma.j.issn.0376-2491.2017.37.008] [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 determine the anatomical relation between the carotid artery or laryngopharynx and the needle path via anterolateral oblique approach to C2 vertebral body, and whether the simulated path can direct the actual procedure. Methods: Contrast agent was injected into bilateral carotid arteries of 10 fresh cadavers (20 sides), and then CT scans were performed on each subject. Bilateral simulated puncture paths were simulated on the image of two-dimensional reconstruction CT. The distance between the puncture site and middle line(AC), the angle between the simulated puncture paths and the median sagittal plane (AOB), the distance between the simulated puncture paths and the side wall of hypopharynx, or the carotid artery was measured respectively. Under the guidance of fluoroscopy, oblique puncture via anterolateral to C2 was performed according to the simulated parameters, and then CT was done. The actual needle path was measured on the image of two-dimensional reconstruction CT. The outcomes were compared by using paired t test between groups. Results: Bilateral simulated puncture paths in all 10 cadavers were achieved on the image of CT. The bilateral punctures via anterolateral to C2 were successfully performed under fluoroscopic guidance in 10 cadavers, and the actual needle path could be showed on the image of two-dimensional reconstruction CT. The AC, angle AOB, the distance to carotid artery and side wall of laryngopharyngeal of the left simulated path was(4.7±1.0)cm, (33±8)°, (6.7±2.6)mm, (6.6±2.8)mm, respectively; and those in the right side was(5.2±1.3) cm, (36±8)°, (7.5±2.2) mm, (7.2±2.5) mm, respectively.The AC, angle AOB, the distance to carotid artery and side wall of laryngopharyngeal of the left actual needle was(4.5±1.1) cm, (33±9) °, (6.7±3.0) mm, (7.1±3.9) mm, respectively; and those in the right side was(5.1±1.5) cm, (35±10) °, (7.4±2.1) mm, (7.2±2.6) mm, respectively.And the actual and simulation data of both sides were compared and no significant differences was found by t test (t=0.104-1.882, all P>0.05). Conclusion: The simulated approach via anterolateral to C2 can be achieved on the image of two-dimensional reconstruction CT, it is consistent with the real needle path and can be used to direct the actual practice to improve the accuracy and safety.
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Affiliation(s)
- W H Yu
- Department of Radiology, School of Medicine, Southeast University, Nanjing 210009, China
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16
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Mastronardi CA, Yu WH, McCann SM. Comparisons of the Effects of Anesthesia and Stress on Release of Tumor Necrosis Factor-α, Leptin, and Nitric Oxide in Adult Male Rats. Exp Biol Med (Maywood) 2016; 226:296-300. [PMID: 11368420 DOI: 10.1177/153537020122600405] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Bacterial lipopolysaccharide (LPS) stimulates massive release of tumor necrosis factor-alpha (TNF-α) together with nitric oxide (NO) and a lessor release of leptin. We hypothesized that other types of stress such as that of surgery might also release these cytokines and NO. Adult male rats were anesthetized with ketamine/acepromazine/xylazine anesthesia (90 + 2 + 6 mg/ml, respectively) and an external jugular catheter was inserted for removal of blood samples (0.6 ml) at various times postoperatively. Plasma TNF-α was almost undetectable in decapitated rats and was near zero immediately following the placement of the jugular catheter (time zero [to]). As the rats awakened from anesthesia, there was a rise in TNF-α at 30 min that peaked at 2 hr with a 400-fold increase and then precipitously declined 40-fold to a level still greater than zero at 3 hr. At 6 hr on the following morning, TNF-α values were near zero, but following connection of tubing and withdrawal of the initial blood sample, there was a 100-fold increase 1 hr later, followed by a decline over the next 3 hr. In contrast, plasma [NO3/NO2] from decapitated rats was 117 μM. Values at t0 were decreased and plummeted 4-fold within 30 min, then rose slightly in the ensuing 3 hr. At 6 hr on the next day [NO3/NO2] values were lower than at t0 and declined gradually during the next 4 hr. Leptin gradually declined from pre-operative concentrations, reaching a minimum at 3 hr and its concentration was unaffected by the bleeding stress of the second day. We conclude that release of TNF-α, [NO3/NO2], and leptin are neurally controlled since plasma levels of all three declined as a result of anesthesia. TNF-α secretion was remarkably stress responsive, whereas NO release appeared to be suppressed by the combined operative and bleeding stress, and leptin was stress unresponsive.
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Affiliation(s)
- C A Mastronardi
- Pennington Biomedical Research Center, Louisiana State University, Baton Rouge 70808-4124, USA
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Fá M, Puzzo D, Piacentini R, Staniszewski A, Zhang H, Baltrons MA, Li Puma DD, Chatterjee I, Li J, Saeed F, Berman HL, Ripoli C, Gulisano W, Gonzalez J, Tian H, Costa JA, Lopez P, Davidowitz E, Yu WH, Haroutunian V, Brown LM, Palmeri A, Sigurdsson EM, Duff KE, Teich AF, Honig LS, Sierks M, Moe JG, D'Adamio L, Grassi C, Kanaan NM, Fraser PE, Arancio O. Extracellular Tau Oligomers Produce An Immediate Impairment of LTP and Memory. Sci Rep 2016; 6:19393. [PMID: 26786552 PMCID: PMC4726138 DOI: 10.1038/srep19393] [Citation(s) in RCA: 193] [Impact Index Per Article: 24.1] [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: 05/29/2015] [Accepted: 10/07/2015] [Indexed: 12/21/2022] Open
Abstract
Non-fibrillar soluble oligomeric forms of amyloid-β peptide (oAβ) and tau proteins are likely to play a major role in Alzheimer's disease (AD). The prevailing hypothesis on the disease etiopathogenesis is that oAβ initiates tau pathology that slowly spreads throughout the medial temporal cortex and neocortices independently of Aβ, eventually leading to memory loss. Here we show that a brief exposure to extracellular recombinant human tau oligomers (oTau), but not monomers, produces an impairment of long-term potentiation (LTP) and memory, independent of the presence of high oAβ levels. The impairment is immediate as it raises as soon as 20 min after exposure to the oligomers. These effects are reproduced either by oTau extracted from AD human specimens, or naturally produced in mice overexpressing human tau. Finally, we found that oTau could also act in combination with oAβ to produce these effects, as sub-toxic doses of the two peptides combined lead to LTP and memory impairment. These findings provide a novel view of the effects of tau and Aβ on memory loss, offering new therapeutic opportunities in the therapy of AD and other neurodegenerative diseases associated with Aβ and tau pathology.
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Affiliation(s)
- M Fá
- Department of Pathology and Cell Biology and Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University, 630 W 168th St. New York, NY 10032 USA
| | - D Puzzo
- Department of Pathology and Cell Biology and Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University, 630 W 168th St. New York, NY 10032 USA.,Department of Biomedical and Biotechnological Sciences, Section of Physiology, University of Catania, Catania, 95125 Italy
| | - R Piacentini
- Institute of Human Physiology, Università Cattolica del Sacro Cuore, Rome, 00168 Italy
| | - A Staniszewski
- Department of Pathology and Cell Biology and Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University, 630 W 168th St. New York, NY 10032 USA
| | - H Zhang
- Department of Pathology and Cell Biology and Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University, 630 W 168th St. New York, NY 10032 USA
| | - M A Baltrons
- Department of Pathology and Cell Biology and Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University, 630 W 168th St. New York, NY 10032 USA.,Department of Biochemistry and Molecular Biology, Institute of Biotechnology and Biomedicine, Universitat Autònoma de Barcelona, Bellaterra, 08193, Spain
| | - D D Li Puma
- Institute of Human Physiology, Università Cattolica del Sacro Cuore, Rome, 00168 Italy
| | - I Chatterjee
- Department of Pathology and Cell Biology and Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University, 630 W 168th St. New York, NY 10032 USA.,Oligomerix, Inc., Oligomerix, Inc., 7 Legion Drive, Suite 101, Valhalla, NY 10595, USA
| | - J Li
- Department of Pathology and Cell Biology and Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University, 630 W 168th St. New York, NY 10032 USA.,Department of Neurology, Third Military Medical University, Chongqing, 400042, China
| | - F Saeed
- Department of Pathology and Cell Biology and Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University, 630 W 168th St. New York, NY 10032 USA
| | - H L Berman
- Department of Pathology and Cell Biology and Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University, 630 W 168th St. New York, NY 10032 USA
| | - C Ripoli
- Institute of Human Physiology, Università Cattolica del Sacro Cuore, Rome, 00168 Italy
| | - W Gulisano
- Department of Biomedical and Biotechnological Sciences, Section of Physiology, University of Catania, Catania, 95125 Italy
| | - J Gonzalez
- Translational Technology Core Laboratory, Rockefeller University, New York, NY 10065, USA
| | - H Tian
- Department of Chemical Engineering, ASU, Tempe, AZ 85281, USA
| | - J A Costa
- Department of Pathology and Cell Biology and Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University, 630 W 168th St. New York, NY 10032 USA
| | - P Lopez
- Oligomerix, Inc., Oligomerix, Inc., 7 Legion Drive, Suite 101, Valhalla, NY 10595, USA
| | - E Davidowitz
- Oligomerix, Inc., Oligomerix, Inc., 7 Legion Drive, Suite 101, Valhalla, NY 10595, USA
| | - W H Yu
- Department of Pathology and Cell Biology and Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University, 630 W 168th St. New York, NY 10032 USA
| | - V Haroutunian
- Department of Psychiatry, The Mount Sinai School of Medicine, JJ-Peters VA Medical Center, Bronx, NY 10468, USA
| | - L M Brown
- Department of Biological Sciences, Columbia University, New York, NY 10027, USA
| | - A Palmeri
- Department of Biomedical and Biotechnological Sciences, Section of Physiology, University of Catania, Catania, 95125 Italy
| | - E M Sigurdsson
- Department of Neuroscience and Physiology, NYU Langone Medical Center, New York, NY 10016, USA
| | - K E Duff
- Department of Pathology and Cell Biology and Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University, 630 W 168th St. New York, NY 10032 USA
| | - A F Teich
- Department of Pathology and Cell Biology and Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University, 630 W 168th St. New York, NY 10032 USA
| | - L S Honig
- Department of Pathology and Cell Biology and Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University, 630 W 168th St. New York, NY 10032 USA
| | - M Sierks
- Translational Technology Core Laboratory, Rockefeller University, New York, NY 10065, USA
| | - J G Moe
- Oligomerix, Inc., Oligomerix, Inc., 7 Legion Drive, Suite 101, Valhalla, NY 10595, USA
| | - L D'Adamio
- Department of Microbiology and Immunology, Einstein College of Medicine, Bronx, NY 10461, USA
| | - C Grassi
- Institute of Human Physiology, Università Cattolica del Sacro Cuore, Rome, 00168 Italy.,San Raffaele Pisana Scientific Institute for Research, Hospitalization and Health Care, Rome, 00163, Italy
| | - N M Kanaan
- Department of Translational Science and Molecular Medicine, College of Human Medicine, MSU, Grand Rapids, MI, 49503, USA
| | - P E Fraser
- Tanz Centre for Research in Neurodegenerative Diseases and Department of Medical Biophysics, University of Toronto, 60 Leonard Avenue, Toronto, Ontario M5T 2S8 Toronto, Canada
| | - O Arancio
- Department of Pathology and Cell Biology and Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University, 630 W 168th St. New York, NY 10032 USA
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Yu WH, Wang YX, Guo JQ, Wang YL, Zheng JS, Zhu KX. Genetic variability of ERCC1 and ERCC2 influences treatment outcomes in gastric cancer. Genet Mol Res 2015; 14:17529-35. [PMID: 26782397 DOI: 10.4238/2015.december.21.25] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We performed a study to investigate the role of ERCC1 (rs11615, rs2298881, and rs3212986) and ERCC2 (rs13181, rs238406, and rs1799793) polymorphisms in the prognosis of gastric cancer. A total of 346 patients with gastric cancer were recruited between May 2009 and May 2012. Single nucleotide polymorphism genotyping was performed using the Sequenom MassARRAY platform. The GA+AA genotype of ERCC2 rs1799793 showed significant and favorable response to chemotherapy than the wide-type GG genotype in multivariate analysis (OR = 1.78, 95%CI = 1.13-2.81). In a Cox proportional hazard model, carriers of ERCC2 rs1799793 GA+AA genotype exhibited longer duration of survival than did those with the GG genotype (hazards ratio = 0.57, 95%CI = 0.35-0.92). In conclusion, our study suggests that ERCC2 rs1799793 polymorphic variation could be used as a predictor for the prognosis of gastric cancer.
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Affiliation(s)
- W H Yu
- Department of Gastroenterology, The Second Hospital, Shandong University, Jinan, China
| | - Y X Wang
- Department of Gastroenterology, The Second Hospital, Shandong University, Jinan, China
| | - J Q Guo
- Department of Gastroenterology, The Second Hospital, Shandong University, Jinan, China
| | - Y L Wang
- Department of Pediatrics, The Second Hospital, Shandong University, Jinan, China
| | - J S Zheng
- Department of Radiology, Shandong Cancer Hospital and Institute, Jinan, China
| | - K X Zhu
- Department of Gastroenterology, The Second Hospital, Shandong University, Jinan, China
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19
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Sun ZC, Xu WG, Xiao XM, Yu WH, Xu DM, Xu HM, Gao HL, Wang RX. Ultrasonic dissection versus conventional electrocautery during gastrectomy for gastric cancer: a meta-analysis of randomized controlled trials. Eur J Surg Oncol 2015; 41:527-33. [PMID: 25690648 DOI: 10.1016/j.ejso.2015.01.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 12/23/2014] [Accepted: 01/19/2015] [Indexed: 01/11/2023] Open
Abstract
OBJECTIVE Use of ultrasonic surgical instrument is gaining popularity for dissection and coagulation in open surgery. However, there is still no consensus on the efficacy and safety of its use compared with conventional surgical technique in open gastrectomy for gastric cancer. The aim of this meta-analysis was to evaluate the role and surgical outcomes of ultrasonic dissection (UD) compared with conventional electrocautery (EC). METHODS A systematic literature search was performed to identify all studies comparing UD and EC in gastric cancer surgery. Intraoperative and postoperative outcomes were compared using weighted mean differences (WMDs) and odds ratios (ORs). RESULTS Five studies were included in this meta-analysis, comprising 489 patients. Meta-analysis results showed that compared with EC, UD was associated with significantly shorter operation time (P = 0.03), less intraoperative blood loss (P = 0.002), lower morbidity (P = 0.02), and reduced postoperative hospital stay (P = 0.03). However, there was no significant difference between the two surgical techniques with regards to postoperative abdominal drainage (P = 0.17), and total cost in hospital (P = 0.59). CONCLUSIONS Compared to EC, the use of UD during open gastrectomy can provide several improved outcomes for operation time, intraoperative blood loss, overall morbidity, and postoperative hospital stay. It appears that UD can be used instead of conventional EC in open gastric cancer surgery, although more larger trials with long follow-up should be performed.
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Affiliation(s)
- Z C Sun
- Department of General Surgery, Weifang People's Hospital, Weifang 261041, Shandong, China
| | - W G Xu
- Department of General Surgery, Weifang People's Hospital, Weifang 261041, Shandong, China
| | - X M Xiao
- Department of General Surgery, Weifang People's Hospital, Weifang 261041, Shandong, China.
| | - W H Yu
- Epidemiology and Statistics Teaching and Research Section, School of Public Health, Tianjin Medical University, Tianjin 300070, China
| | - D M Xu
- Department of General Surgery, Weifang People's Hospital, Weifang 261041, Shandong, China
| | - H M Xu
- Department of General Surgery, Weifang People's Hospital, Weifang 261041, Shandong, China
| | - H L Gao
- Department of General Surgery, Weifang People's Hospital, Weifang 261041, Shandong, China
| | - R X Wang
- Department of Cardiovascular Surgery, Tianjin Medical University General Hospital, Tianjin 300052, China
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20
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Cao X, Zhou XM, Gan R, Jiang LQ, Lu L, Wang Y, Fan N, Yin Y, Yan NH, Yu WH, Liu XY. A novel mutation of PAX6 identified in a Chinese twin family with congenital aniridia complicated with nystagmus. Genet Mol Res 2014; 13:8679-85. [PMID: 25366758 DOI: 10.4238/2014.october.27.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Genetic variations within the paired box gene 6 (PAX6) gene are associated with congenital aniridia. To detect the genetic defects in a Chinese twin family with congenital aniridia and nystagmus, exons of PAX6 were amplified by polymerase chain reaction (PCR), sequenced and compared with a reference database. Six members from the family of three generations were included in the study. The twins' father presented with congenital aniridia, nystagmus and cataract at birth, while the twins presented with congenital aniridia and nystagmus. A novel mutation c.888 insA in exon 10 of PAX6 was identified in all affected individuals. This study suggests that the novel mutation c.888 insA is likely responsible for the pathogenesis of the congenital aniridia and nystagmus in this pedigree. To the best of our knowledge, this is the first report of this mutation in PAX6 gene in pedigree with aniridia. Furthermore, no PAX6 gene defect was reported in twins with congenital aniridia.
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Affiliation(s)
- X Cao
- Ophthalmic Laboratories & Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu, China
| | - X M Zhou
- Ophthalmic Laboratories & Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu, China
| | - R Gan
- Shenzhen Key Laboratory of Ophthalmology, Shenzhen Eye Hospital, Jinan University, Shenzhen, China
| | - L Q Jiang
- Shenzhen Key Laboratory of Ophthalmology, Shenzhen Eye Hospital, Jinan University, Shenzhen, China
| | - L Lu
- Shenzhen Key Laboratory of Ophthalmology, Shenzhen Eye Hospital, Jinan University, Shenzhen, China
| | - Y Wang
- Shenzhen Key Laboratory of Ophthalmology, Shenzhen Eye Hospital, Jinan University, Shenzhen, China
| | - N Fan
- Shenzhen Key Laboratory of Ophthalmology, Shenzhen Eye Hospital, Jinan University, Shenzhen, China
| | - Y Yin
- Ophthalmic Laboratories & Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu, China
| | - N H Yan
- Ophthalmic Laboratories & Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu, China
| | - W H Yu
- Ophthalmic Laboratories & Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu, China
| | - X Y Liu
- Shenzhen Key Laboratory of Ophthalmology, Shenzhen Eye Hospital, Jinan University, Shenzhen, China
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21
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Wang X, Chen HL, Liu JZ, Liao N, Yu WH, Zhang XD, Zhang T, Li WL, Hai CX. Protective effect of oleanolic acid against beta cell dysfunction and mitochondrial apoptosis: crucial role of ERK-NRF2 signaling pathway. J BIOL REG HOMEOS AG 2013; 27:55-67. [PMID: 23489687] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Pancreatic beta cell dysfunction is a hallmark of diabetes. Our previous results have shown that oleanolic acid (OA) has anti-diabetic potential. However, there is little literature reporting the effect of OA on beta cell dysfunction. The present study was designed to investigate the protective effect of OA against lipotoxicity and the underlying mechanisms. Lepr (db/db) diabetic mice were subjected to fasting blood glucose measurement, intraperitoneal glucose tolerance test after the administration of OA for two weeks. Histopathological observation was conducted by HE staining and transmission electron microscopy assay. Pancreatic islets were isolated from db/db diabetic mice and C57BL/6J mice. Palmitic acid (PA) was used to induce lipotoxicity in vitro. Apoptosis was evaluated in pancreatic islets in diabetic mice and in isolated pancreatic islets and beta-TC3 cells by TUNEL assay. Cellular ATP content, mitochondrial function and redox balance were examined. Phosphorylation of c-Jun NH2-terminal kinase (JNK) and extracellular signal-regulated kinase (ERK) and the activation of nuclear erythroid factor 2 p45-related factor 2 (Nrf2) signaling were evaluated by western blotting. In db/db mice, OA significantly protects beta cell function against lipotoxicity, evidenced by inhibition of apoptosis and improvement of glucose tolerance. In cells, OA administration may protect against PA-induced apoptosis and decrease of GSIS, in which process the activation of Nrf2 is essential. Once Nrf2 is activated, OA could induce GCLc expression, promote the production of GSH, and thus inhibit JNK phosphorylation and solid the antioxidant defense of mitochondria, leading to the inhibition of mitochondrial apoptosis. ERK signaling pathway is responsible for OA-induced activation of Nrf2 and the protective effect of OA. Overall, our study enhances the understanding of the protective effect of OA on beta cell and provides clues for further studies on the underlying mechanisms.
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Affiliation(s)
- X Wang
- Department of Toxicology, School of Public Health, Fourth Military Medical University, Xian, China
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22
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Abstract
Mesenchymal stem cells (MSCs) represent a heterogeneous population of progenitor cells with self-renewal and multipotent differentiation potential. Aside from their regenerative role, extensive in vitro and in vivo studies have demonstrated that MSCs are capable of potent immunomodulatory effects on a variety of innate and adaptive immune cells. In this article, we will review recent experimental studies on the characterization of a unique population of MSCs derived from human oral mucosa and gingiva, especially their immunomodulatory and anti-inflammatory functions and their application in the treatment of several in vivo models of inflammatory diseases. The ease of isolation, accessible tissue source, and rapid ex vivo expansion, with maintenance of stable stem-cell-like phenotypes, render oral mucosa- and gingiva-derived MSCs a promising alternative cell source for MSC-based therapies.
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Affiliation(s)
- Q Z Zhang
- Department of Oral and Maxillofacial Surgery and Pharmacology, Penn Dental Medicine and Penn Medicine Hospital of the University of Pennsylvania, Philadelphia, PA 19104, USA
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23
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Hsieh CL, Yu WH, Hsueh IP, Hou WH, Wang YH. A comparison of responsiveness and predictive validity of two balance measures in patients with stroke. J Rehabil Med 2012; 44:176-80. [DOI: 10.2340/16501977-0903] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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24
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Tu CJ, Liu WG, Dong XQ, Liu JS, Song DG, Yu WH, Zhang ZY, Zhen G, Luo HM. Association of Interleukin-11 with Mortality in Patients with Spontaneous Basal Ganglia Haemorrhage. J Int Med Res 2011; 39:1265-74. [PMID: 21986128 DOI: 10.1177/147323001103900414] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
This study evaluated interleukin (IL)-11 as an independent prognostic marker of mortality following intracerebral haemorrhage (ICH). Plasma IL-11 levels in patients with ICH were significantly higher than in healthy controls. Multivariate analysis indicated that plasma IL-11 level was an independent predictor for mortality within 1 week of ICH onset and was positively associated with haematoma volume. Receiver operating characteristic curve analysis identified that a baseline plasma IL-11 level > 20.9 pg/ml predicted mortality within 1 week of ICH onset with 81.2% sensitivity and 74.1% specificity. The area under the curve for IL-11 level was significantly smaller than that for the Glasgow Coma Scale score, but similar to that for haematoma volume. IL-11 did not, however, significantly improve the predictive value of the Glasgow Coma Scale or haematoma volume. Thus, IL-11 may be considered as a new independent prognostic marker of mortality and an additional valuable tool for risk stratification and decision-making in the acute phase of ICH.
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Affiliation(s)
- CJ Tu
- Department of Neurosurgery, Shaoxing County Central Hospital, Shaoxing, China
| | - WG Liu
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - XQ Dong
- Department of Neurosurgery, The First Hangzhou Municipal People's Hospital, Hangzhou, China
| | - JS Liu
- Department of Neurosurgery, Shaoxing County Central Hospital, Shaoxing, China
| | - DG Song
- Department of Neurosurgery, Shaoxing County Central Hospital, Shaoxing, China
| | - WH Yu
- Department of Neurosurgery, The First Hangzhou Municipal People's Hospital, Hangzhou, China
| | - ZY Zhang
- Department of Neurosurgery, The First Hangzhou Municipal People's Hospital, Hangzhou, China
| | - G Zhen
- Department of Neurosurgery, Shaoxing County Central Hospital, Shaoxing, China
| | - HM Luo
- Department of Neurosurgery, Shaoxing County Central Hospital, Shaoxing, China
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Abstract
The aquaporins (AQPs) are a family of homologous water channels expressed in many tissues. In this study, the expression and immunolocalization of different AQP subtypes in rat brains were investigated by RT-PCR, immunohistochemistry and immunofluorescence. The data showed that AQP1 was expressed in the subpial processes of astrocytes, choroid plexus and ependyma. AQP3, AQP5 and AQP8 had similar distribution patterns in piriform cortex, choroid plexus, hippocampus and dorsal thalamus. AQP4 and AQP9 were widely expressed in the rat brain and distributed in the subpial processes of astrocytes, ependyma, dorsal thalamus, hippocampus, white matter, suprachiasmatic nucleus (SCN) and supraoptic nucleus. AQP3, AQP4, AQP5, AQP8 and AQP9 were found in the Bergmann glial cells of cerebellum, cochlear nucleus and trapezoid nuclei. The distinct localization of various AQPs in cerebrum and the similarities of distribution patterns within cerebellum, cochlear nucleus and trapezoid nuclei suggest that AQPs may play an important role in maintaining the specific microenvironments of the brain.
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Affiliation(s)
- M Yang
- Institute of Neuroscience, Chongqing Medical University, China
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26
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Yu DKH, Wu KK, Abdullah ASM, Chai SC, Chai SB, Chau KY, Jeong AKY, Liu CY, Tam WK, Yu WH, Yam HK. Smoking cessation among Hong Kong Chinese smokers attending hospital as outpatients: impact of doctors' advice, successful quitting and intention to quit. Asia Pac J Public Health 2005; 16:115-20. [PMID: 15624789 DOI: 10.1177/101053950401600207] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
To identify factors affecting current smokers' intention to quit smoking and factors associated with successful quitting among ex-smokers in Hong Kong. A cross-sectional survey of Chinese patients attending medical and surgical Specialist Outpatient Clinics (SOPCs) of public hospitals in Hong Kong, using a structured questionnaire. Results of the 642 respondents, 21% were current smokers, 9% were ex-smokers and 69% were non-smokers. 74% of the smokers reportedly received quitting advice from doctors. Among the current smokers, past quitting attempts, receiving information from sources other than doctors, believing that doctor's advice was useful, believing that all smokers should quit smoking and a positive attitude towards quitting were associated with intention to quit. Among those who had attempted to quit, being older (aged 50 or above), being retired/unemployed and consuming more than 10 cigarettes per day were associated with successful quitting. We found that advice from doctors on quitting smoking did not have any impact on Chinese smokers quitting or future intention to quit and reflect the inadequacy of advice given by Hong Kong doctors. The predictors of intention to quit and successful quitting identified in the study could be used to design future smoking cessation services.
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Affiliation(s)
- D K H Yu
- Health Care Project Group-15, Faculty of Medicine, The University of Hong Kong, Hong Kong
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Yu WH, Kang ET, Neoh KG. Controlled grafting of comb copolymer brushes on poly(tetrafluoroethylene) films by surface-initiated living radical polymerizations. Langmuir 2005; 21:450-456. [PMID: 15620338 DOI: 10.1021/la0485531] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Surface modification of poly(tetrafluoroethylene) (PTFE) films by well-defined comb copolymer brushes was carried out. Peroxide initiators were generated directly on the PTFE film surface via radio frequency Ar plasma pretreatment, followed by air exposure. Poly(glycidyl methacrylate) (PGMA) brushes were first prepared by surface-initiated reversible addition-fragmentation chain transfer polymerization from the peroxide initiators on the PTFE surface in the presence of a chain transfer agent. Kinetics study revealed a linear increase in the graft concentration of PGMA with the reaction time, indicating that the chain growth from the surface was consistent with a "controlled" or "living" process. alpha-Bromoester moieties were attached to the grafted PGMA by reaction of the epoxide groups with 2-bromo-2-methylpropionic acid. The comb copolymer brushes were subsequently prepared via surface-initiated atom transfer radical polymerization of two hydrophilic vinyl monomers, including poly(ethylene glycol) methyl ether methacrylate and sodium salt of 4-styrenesulfonic acid. The chemical composition of the modified PTFE surfaces was characterized by X-ray photoelectron spectroscopy.
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Affiliation(s)
- W H Yu
- Department of Chemical and Environmental Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260, Singapore
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28
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Yu WH, Kumar A, Peterhoff C, Shapiro Kulnane L, Uchiyama Y, Lamb BT, Cuervo AM, Nixon RA. Autophagic vacuoles are enriched in amyloid precursor protein-secretase activities: implications for β-amyloid peptide over-production and localization in Alzheimer’s disease. Int J Biochem Cell Biol 2004; 36:2531-40. [PMID: 15325590 DOI: 10.1016/j.biocel.2004.05.010] [Citation(s) in RCA: 194] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2004] [Revised: 05/20/2004] [Accepted: 05/21/2004] [Indexed: 10/26/2022]
Abstract
In Alzheimer's disease (AD), the neuropathologic hallmarks of beta-amyloid deposition and neurofibrillary degeneration are associated with early and progressive pathology of the endosomal-lysosomal system. Abnormalities of autophagy, a major pathway to lysosomes for protein and organelle turnover, include marked accumulations of autophagy-related vesicular compartments (autophagic vacuoles or AVs) in affected neurons. Here, we investigated the possibility that AVs contain the proteases and substrates necessary to cleave the amyloid precursor protein (APP) to A beta peptide that forms beta-amyloid, a key pathogenic factor in AD. AVs were highly purified using a well-established metrizamide gradient procedure from livers of transgenic YAC mice overexpressing wild-type human APP. By Western blot analysis, AVs contained APP, beta CTF - the beta-cleaved carboxyl-terminal domain of APP, and BACE, the protease-mediating beta-cleavage of APP. beta-Secretase activity measured against a fluorogenic peptide was significantly enriched in the AV fraction relative to whole-liver lysate. Compared to other recovered subcellular fractions, AVs exhibited the highest specific activity of gamma-secretase based on a fluorogenic assay and inhibition by a specific inhibitor of gamma-secretase, DAPT. AVs were also the most enriched subcellular fraction in levels of the gamma-secretase components presenilin and nicastrin. Immunoelectron microscopy demonstrated selective immunogold labeling of AVs with antibodies specific for the carboxyl termini of human A beta 40 and A beta 42. These data indicate that AVs are a previously unrecognized and potentially highly active compartment for A beta generation and suggest that the abnormal accumulation of AVs in affected neurons of the AD brain contributes to beta-amyloid deposition.
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Affiliation(s)
- W H Yu
- Center for Dementia Research, Nathan S. Kline Institute, 140 Old Orangeburg Road, Orangeburg, NY 10962, USA
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29
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Xu D, Yu WH, Kang ET, Neoh KG. Functionalization of hydrogen-terminated silicon via surface-initiated atom-transfer radical polymerization and derivatization of the polymer brushes. J Colloid Interface Sci 2004; 279:78-87. [PMID: 15380414 DOI: 10.1016/j.jcis.2004.06.062] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2004] [Accepted: 06/23/2004] [Indexed: 11/15/2022]
Abstract
Surface-initiated atom-transfer radical polymerization (ATRP) of poly(ethylene glycol) monomethacrylate (PEGMA) was carried out on the hydrogen-terminated Si(100) substrates with surface-tethered alpha-bromoester initiator. Kinetic studies confirmed an approximately linear increase in polymer film thickness with reaction time, indicating that chain growth from the surface was a controlled "living" process. The "living" character of the surface-grafted PEGMA chains was further ascertained by the subsequent extension of these graft chains, and thus the graft layer. Well-defined polymer brushes of near 100 nm in thickness were grafted on the Si(100) surface in 8 h under ambient temperature in an aqueous medium. The hydroxyl end groups of the poly(ethylene glycol) (PEG) side chains of the grafted PEGMA polymer were derivatized into various functional groups, including chloride, amine, aldehyde, and carboxylic acid groups. The surface-functionalized silicon substrates were characterized by reflectance FT-IR spectroscopy and X-ray photoelectron spectroscopy (XPS). Covalent attachment and derivatization of the well-defined PEGMA polymer brushes can broaden considerably the functionality of single-crystal silicon surfaces.
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Affiliation(s)
- D Xu
- Department of Chemical Engineering, National University of Singapore, Kent Ridge, 119260
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Yu WH, Kang ET, Neoh KG. Controlled grafting of well-defined epoxide polymers on hydrogen-terminated silicon substrates by surface-initiated ATRP at ambient temperature. Langmuir 2004; 20:8294-300. [PMID: 15350105 DOI: 10.1021/la036089e] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Controlled grafting of well-defined epoxide polymer brushes on the hydrogen-terminated Si(100) substrates (Si-H substrates) was carried out via the surface-initiated atom-transfer radical polymerization (ATRP) at room temperature. Thus, glycidyl methacrylate (GMA) polymer brushes were prepared by ATRP from the alpha-bromoester functionalized Si-H surface. Kinetic studies revealed a linear increase in GMA polymer (PGMA) film thickness with reaction time, indicating that chain growth from the surface was a controlled "living" process. The graft polymerization proceeded more rapidly in the dimethylformamide/water (DMF/H(2)O) mixed solvent medium than in DMF, leading to much thicker PGMA growth on the silicon surface in the former medium. The chemical composition of the GMA graft-polymerized silicon (Si-g-PGMA) surfaces were characterized by X-ray photoelectron spectroscopy (XPS). The fact that the epoxide functional groups of the grafted PGMA were preserved quantitatively was revealed in the reaction with ethylenediamine. The "living" character of the PGMA chain end was further ascertained by the subsequent growth of a poly(pentafluorostyrene) (PFS) block from the Si-g-PGMA surface, using the PGMA brushes as the macroinitiators.
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Affiliation(s)
- W H Yu
- Department of Chemical Engineering, National University of Singapore, Kent Ridge, Singapore
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31
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Ying L, Yu WH, Kang ET, Neoh KG. Functional and surface-active membranes from poly(vinylidene fluoride)-graft-poly(acrylic acid) prepared via RAFT-mediated graft copolymerization. Langmuir 2004; 20:6032-40. [PMID: 16459627 DOI: 10.1021/la049383v] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Poly (vinylidene fluoride) (PVDF) with "living" poly (acrylic acid) (PAAc) side chains (PVDF-g-PAAc) was prepared by reversible addition-fragmentation chain transfer (RAFT)-mediated graft copolymerization of acrylic acid (AAc) with the ozone-pretreated PVDF. The chemical composition and structure of the copolymers were characterized by elemental analysis, Fourier transform infrared spectroscopy, and thermogravimetric analysis. The copolymer could be readily cast into pH-sensitive microfiltration (MF) membranes with enriched living PAAc graft chains on the surface (including the pore surfaces) by phase inversion in an aqueous medium. The surface composition of the membranes was determined by X-ray photoelectron spectroscopy. The morphology of the membranes was characterized by scanning electron microscopy. The pore size distribution of the membranes was found to be much more uniform than that of the corresponding membranes cast from PVDF-g-PAAc prepared by the "conventional" free-radical graft copolymerization process. Most important of all, the MF membranes with surface-tethered PAAc macro chain transfer agents, or the living membrane surfaces, could be further functionalized via surface-initiated block copolymerization with N-isopropylacrylamide (NIPAAM) to obtain the PVDF-g-PAAc-b-PNIPAAM MF membranes, which exhibited both pH- and temperature-dependent permeability to aqueous media.
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Affiliation(s)
- L Ying
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Kent Ridge, Singapore 119260
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Karanth S, Yu WH, Mastronardi CA, McCann SM. Vitamin E stimulates luteinizing hormone-releasing hormone and ascorbic acid release from medial basal hypothalami of adult male rats. Exp Biol Med (Maywood) 2003; 228:779-85. [PMID: 12876296 DOI: 10.1177/15353702-0322807-02] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Vitamin E, a dietary factor, is essential for reproduction in animals. It is an antioxidant present in all mammalian cells. Previously, we showed that ascorbic acid (AA) acted as an inhibitory neurotransmitter in the hypothalamus by scavenging nitric oxide (NO). Earlier studies have shown the antioxidant synergism between vitamin E and ascorbic acid (AA). Therefore, it was of interest to evaluate the effect of vitamin E on luteinizing hormone-releasing hormone (LHRH) and AA release. Medial basal hypothalami from adult male rats of the Sprague Dawley strain were incubated with Krebs-Ringer bicarbonate buffer or graded concentrations of a water soluble form of vitamin E, tocopheryl succinate polyethylene glycol 1000 (TPGS, 22-176 microM) for 1 hr. Subsequently, the tissues were incubated with vitamin E or combinations of vitamin. E + N-methyl-D-aspartic acid (NMDA), an excitatory amino acid for 30 min to study the effect of prior and continued exposure to vitamin E on NMDA-induced LHRH release. AA and LHRH released into the incubation media were determined by high-performance liquid chromatography and radioimmunoassay, respectively. Vitamin E stimulated both LHRH and AA release. The minimal effective concentrations were 22 and 88 microM, respectively. NMDA stimulated LHRH release as previously shown and this effect was not altered in the combined presence of vitamin E plus NMDA. However, AA release was significantly reduced in the combined presence of vitamin E plus NMDA. To evaluate the role of NO in vitamin E-induced LHRH and AA release, the tissues were incubated with vitamin E or combinations of vitamin E + NG-monomethyl-L-arginine (NMMA), a competitive inhibitor of NO synthase. NMMA significantly suppressed vitamin E-induced LHRH and AA release indicating a role of NO in the release of both LHRH and AA. The data suggest that vitamin E plays a role in the hypothalamic control of LHRH and AA release and that the release is mediated by NO.
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Affiliation(s)
- S Karanth
- Pennington Biomedical Research Center, Louisiana State University, Baton Rouge, Louisiana 70808-4124, USA
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Affiliation(s)
- S M McCann
- Pennington Biomedical Research Center, Louisiana State University, 6400 Perkins Road, Baton Rouge, LA 70808-4124, USA.
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Yu WH, Karanth S, Mastronardi CA, Sealfon S, Dean C, Dees WL, McCann SM. Lamprey GnRH-III acts on its putative receptor via nitric oxide to release follicle-stimulating hormone specifically. Exp Biol Med (Maywood) 2002; 227:786-93. [PMID: 12324658 DOI: 10.1177/153537020222700910] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Lamprey gonadotropin-releasing hormone-III (l-GnRH-III), the putative follicle-stimulating hormone (FSH)-releasing factor (FSHRF), exerts a preferential FSH-releasing activity in rats both in vitro and in vivo. To test the hypothesis that l-GnRH-III acts on its own receptors to stimulate gonadotropin release, the functional activity of this peptide at mammalian (m) leutinizing hormone (LH)RH receptors transfected to COS cells was tested. l-GnRH-III activated m-LHRH receptors only at a minimal effective concentration (MEC) of 10(-6) M, whereas m-LHRH was active at a MEC of 10(-9) M, at least 1,000 times less than that required for l-GnRH-III. In 4-day monolayer cultured cells, l-GnRH-III was similarly extremely weak in releasing either LH or FSH, and, in fact, it released LH at a lower concentration (10(-7) M) than that required for FSH release (10(-6) M). In this assay, m-LHRH released both FSH and LH significantly at the lowest concentration tested (10(-10) M). On the other hand, l-GnRH-III had a high potency to selectively release FSH and not LH from hemipituitaries of male rats. The results suggest that the cultured cells were devoid of FSHRF receptors, thereby resulting in a pattern of FSH and LH release caused by the LHRH receptor. On the other hand, the putative FSH-releasing factor receptor accounts for the selective FSH release by l-GnRH-III when tested on hemipituitaries. Removal of calcium from the medium plus the addition of EGTA, a calcium chelator, suppressed the release of gonadotropins induced by either l-GnRH-III or LHRH, indicating that calcium is required for the action of either peptide. Previous results showed that sodium nitroprusside, a releaser of nitric oxide (NO), causes the release of both FSH and LH from hemipituitaries incubated in vitro. In the present experiments, a competitive inhibitor of NO synthase, L-NG-monomethyl-L-arginine (300 micro M) blocked the action of l-GnRH-III or partially purified FSHRF. The results indicate that l-GnRH-III and FSHRF act on putative FSHRF receptors by a calcium-dependent NO pathway.
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Affiliation(s)
- W H Yu
- Pennington Biomedical Research Center, Louisiana State University, Baton Rouge 70808, USA
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Abstract
Because leptin stimulates nitric oxide (NO) release from the hypothalamus and anterior pituitary gland, we hypothesized that it also might release NO from adipocytes, the principal source of leptin. Consequently, plasma concentrations of leptin and NO, estimated from its metabolites NO(3) and NO(2) (NO(3)-NO(2)), were measured in adult male rats. There was a linear increase of both leptin and NO(3)-NO(2) with body weight that was associated with a parallel rise in fat mass. These findings indicate that release of leptin and NO is directly related to adipocyte mass. Furthermore, there was a parallelism in circadian rhythm of both substances, with peaks at 0130 h and nadirs at 0730 h. Measurement of both leptin and NO(3)-NO(2) in plasma from individual rats revealed that NO(3)-NO(2) increased linearly with leptin. Incubation of epididymal fat pads with leptin or its i.v. injection in conscious rats increased NO(3)-NO(2) release. The release of NO(3)-NO(2) in vivo and in vitro exceeded that of leptin by many fold, indicating that leptin activates NO synthase. Leptin increased tumor necrosis factor (TNF)-alpha release at a 100-fold lower dose than required for NO release in vitro and in vivo, suggesting that it also may participate in leptin-induced NO release. However, because many molecules of leptin were required to release a molecule of TNF-alpha in vivo and in vitro, we believe that leptin-induced TNF-alpha release is an associated phenomenon not involved in NO production. The results support the hypothesis that adipocytes play a major role in NO release by activating NO synthase in the adipocytes and the adjacent capillary endothelium.
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Affiliation(s)
- C A Mastronardi
- Pennington Biomedical Research Center, Louisiana State University, 6400 Perkins Road, Baton Rouge, LA 70808-4124, USA
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Hiney JK, Sower SA, Yu WH, McCann SM, Dees WL. Gonadotropin-releasing hormone neurons in the preoptic-hypothalamic region of the rat contain lamprey gonadotropin-releasing hormone III, mammalian luteinizing hormone-releasing hormone, or both peptides. Proc Natl Acad Sci U S A 2002; 99:2386-91. [PMID: 11842221 PMCID: PMC122374 DOI: 10.1073/pnas.042699799] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [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] [Accepted: 12/26/2001] [Indexed: 11/18/2022] Open
Abstract
This study utilized a newly developed antiserum, specific for lamprey gonadotropin-releasing hormone III (l-GnRH-III), to determine the following: in which regions of the rat hypothalamus the neuronal perikarya producing l-GnRH-III are localized; and whether this peptide, known to selectively induce follicle-stimulating hormone release, is coexpressed in neurons containing mammalian luteinizing hormone-releasing hormone (m-LHRH). Double-label immunocytochemistry was performed by using an l-GnRH-III polyclonal antiserum and an LHRH monoclonal antiserum. Immunopositive neurons for l-GnRH-III, m-LHRH, or neurons coexpressing both peptides were detected within the organum vasculosum lamina terminalis (OVLT) region of the preoptic area (POA). Caudal to the OVLT, l-GnRH-III-positive neurons were also observed dorso-medially, above the third ventricle in the medial POA. The m-LHRH neurons were not observed in this area. The lateral POA region contained neurons positive for both peptides along with single-labeled neurons for each peptide. Importantly, neurons that expressed l-GnRH-III, m-LHRH, or both peptides were also detected in the ventral regions of the rostral hypothalamus, dorsolateral to the borders of the supraoptic nuclei. In both of these latter areas, neurons containing l-GnRH-III were slightly dorsal to neurons containing only m-LHRH. The l-GnRH-III perikarya and fibers were eliminated by absorption of the primary antiserum with l-GnRH-III, but not by l-GnRH-I, chicken-GnRH-II, or m-LHRH. These results indicate that, unlike other isoforms of GnRH found in the mammalian brain, l-GnRH-III neurons not only are observed in regions that control follicle-stimulating hormone release but also are colocalized with m-LHRH neurons in areas primarily controlling LH release. These findings suggest an interrelationship between these two peptides in the control of gonadotropin secretion.
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Affiliation(s)
- J K Hiney
- Department of Veterinary Anatomy and Public Health, College of Veterinary Medicine, Texas A&M University, College Station, TX 77843-4458, USA.
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Abstract
The autonomic nervous system plays a regulatory role in the differentiation and growth of salivary glands, and in the expression of salivary specific genes. Cystatin S, a member of the evolutionarily conserved family 2 of the cysteine proteinase inhibitor superfamily, expressed in submandibular and parotid glands of rats during development, can be induced in adults by the beta-adrenergic agonist isopreterenol (IPR). It was shown previously that unilateral sympathectomy or bilateral parasympathectomy reduces IPR-induced cystatin S expression. The present experiments demonstrate that IPR-induced cystatin S gene expression in submandibular glands is reduced as early as 3 days post bilateral denervation of both branches of the autonomic nervous system. The reduction is nearly equal to that of either sympathectomy or parasympathectomy alone, suggesting that factor(s) in both sympathetic and parasympathetic fibers are simultaneously required for IPR-induced cystatin S gene expression.
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Affiliation(s)
- P A Shaw
- Department of Cell Biology and Anatomy, Mount Sinai School of Medicine, New York, NY 10029, USA.
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Mastronardi CA, Yu WH, Srivastava VK, Dees WL, McCann SM. Lipopolysaccharide-induced leptin release is neurally controlled. Proc Natl Acad Sci U S A 2001; 98:14720-5. [PMID: 11724949 PMCID: PMC64748 DOI: 10.1073/pnas.251543598] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.2] [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] [Accepted: 10/12/2001] [Indexed: 11/18/2022] Open
Abstract
Our hypothesis is that leptin release is controlled neurohormonally. Conscious, male rats bearing indwelling, external, jugular catheters were injected with the test drug or 0.9% NaCl (saline), and blood samples were drawn thereafter to measure plasma leptin. Anesthesia decreased plasma leptin concentrations within 10 min to a minimum at 120 min, followed by a rebound at 360 min. Administration (i.v.) of lipopolysaccharide (LPS) increased plasma leptin to almost twice baseline by 120 min, and it remained on a plateau for 360 min, accompanied by increased adipocyte leptin mRNA. Anesthesia largely blunted the LPS-induced leptin release at 120 min. Isoproterenol (beta-adrenergic agonist) failed to alter plasma leptin but reduced LPS-induced leptin release significantly. Propranolol (beta-receptor antagonist) produced a significant increase in plasma leptin but had no effect on the response to LPS. Phentolamine (alpha-adrenergic receptor blocker) not only increased plasma leptin (P < 0.001), but also augmented the LPS-induced increase (P < 0.001). alpha-Bromoergocryptine (dopaminergic-2 receptor agonist) decreased plasma leptin (P < 0.01) and blunted the LPS-induced rise in plasma leptin release (P < 0.001). We conclude that leptin is at least in part controlled neurally because anesthesia decreased plasma leptin and blocked its response to LPS. The findings that phentolamine and propranolol increased plasma leptin concentrations suggest that leptin release is inhibited by the sympathetic nervous system mediated principally by alpha-adrenergic receptors because phentolamine, but not propranolol, augmented the response to LPS. Because alpha-bromoergocryptine decreased basal and LPS-induced leptin release, dopaminergic neurons may inhibit basal and LPS-induced leptin release by suppression of release of prolactin from the adenohypophysis.
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Affiliation(s)
- C A Mastronardi
- Pennington Biomedical Research Center, Louisiana State University, 6400 Perkins Road, Baton Rouge, LA 70808-4124, USA
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McCann SM, Karanth S, Mastronardi CA, Dees WL, Childs G, Miller B, Sower S, Yu WH. Control of gonadotropin secretion by follicle-stimulating hormone-releasing factor, luteinizing hormone-releasing hormone, and leptin. Arch Med Res 2001; 32:476-85. [PMID: 11750723 DOI: 10.1016/s0188-4409(01)00343-5] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.1] [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: 10/18/2022]
Abstract
Fractionation of hypothalamic extracts on a Sephadex G-25 column separates follicle-stimulating hormone-releasing factor (FSHRF) from luteinizing hormone-releasing hormone (LHRH). The FSH-releasing peak contained immunoreactive lamprey gonadotropin-releasing hormone (lGnRH) by radioimmunoassay, and its activity was inactivated by an antiserum specific to lGnRH. The identity of lGnRH-III with FSHRF is supported by studies with over 40 GnRH analogs that revealed that this is the sole analog with preferential FSH-releasing activity. Selective activity appears to require amino acids 5-8 of lGnRH-III. Chicken GnRH-II has slight selective FSH-releasing activity. Using a specific lGnRH-III antiserum, a population of lGnRH-III neurons was visualized in the dorsal and ventral preoptic area with axons projecting to the median eminence in areas shown previously to control FSH secretion based on lesion and stimulation studies. Some lGnRH-III neurons contained only this peptide, others also contained LHRH, and still others contained only LHRH. The differential pulsatile release of FSH and LH and their differential secretion at different times of the estrous cycle may be caused by differential secretion of FSHRF and LHRH. Both FSH and LHRH act by nitric oxide (NO) that generates cyclic guanosine monophosphate. lGnRH-III has very low affinity to the LHRH receptor. Biotinylated lGnRH-III (10(-9) M) labels 80% of FSH gonadotropes and is not displaced by LHRH, providing evidence for the existence of an FSHRF receptor. Leptin has equal potency as LHRH to release gonadotropins by NO. lGnRH-III specifically releases FSH, not only in rats but also in cows.
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Affiliation(s)
- S M McCann
- Department of Basic Science, Pennington Biomedical Research Center, Louisiana State University, Baton Rouge, LA 70808-3030, USA.
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Karanth S, Yu WH, Walczewska A, Mastronardi CA, McCann SM. Ascorbic acid stimulates gonadotropin release by autocrine action by means of NO. Proc Natl Acad Sci U S A 2001; 98:11783-8. [PMID: 11562458 PMCID: PMC58808 DOI: 10.1073/pnas.191369398] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [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] [Accepted: 07/18/2001] [Indexed: 01/21/2023] Open
Abstract
Because high concentrations of ascorbic acid (AA) are found in the adenohypophysis, we hypothesized that it might have an acute effect on the secretion of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) from the gland, particularly because we have reported that AA rapidly inhibits stimulated LH-releasing hormone (LHRH) release from medial basal hypothalamic explants. Incubation of anterior pituitary halves from adult male rats with graded concentrations of AA for 1 h induced highly significant release of both FSH and LH with a minimal effective concentration of 10(-5) M. Release remained on a plateau from 10(-5) to 10(-2) M. When both AA and an effective concentration of LHRH were incubated together, there was no additive response to LHRH and the response was the same as to either compound alone. The FSH and LH release in response to AA was blocked by incubation with N(G)-monomethyl-l-arginine (NMMA) (300 microM), a competitive inhibitor of NO synthase. NMMA also inhibited LHRH-induced LH and FSH release and gonadotropin release in the presence of both LHRH and AA, whereas sodium nitroprusside, a releaser of NO, stimulated LH and FSH release. Membrane depolarization caused by incubation in high potassium (K(+) = 28 or 56 mM) medium stimulated release of FSH, LH, and AA that was blocked by NMMA. We hypothesize that AA is released with FSH and LH from secretory granules. AA is transported back into gonadotropes by the AA transporter and increases intracellular [Ca(2+)]-activating NO synthase that evokes exocytosis of gonadotropins and AA by cGMP.
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Affiliation(s)
- S Karanth
- Pennington Biomedical Research Center, Louisiana State University, 6400 Perkins Road, Baton Rouge, LA 70808-4124, USA
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Abstract
Unlike the gelatinases (MMP-2 and -9), matrilysin (MMP-7) and collagenases (MMP-1 and -13) are difficult to detect at low levels in conventional casein or gelatin zymography. In this report, heparin was used to enhance the zymographic assays for MMP-7, -1, and -13. With the addition of heparin to the enzyme sample, MMP-7 can be detected at a level of 30 pg in transferrin zymography and MMP-1 and -13 can be detected at a level of 0.2 ng in gelatin zymography. Carboxymethylated transferrin is used instead of casein as a substrate for assaying rat MMP-7. This substrate does not require a prerun step or substrate cross-linking to give uniform staining and clear band formation. It is necessary for heparin to run to the same region of the gel as the enzyme to produce its enhancing effect. For MMP-7 movement of heparin and enzyme is almost equal; for the collagenases it is necessary to add heparin to each well after the electrophoretic run is underway. Possible mechanisms of activity enhancement are discussed.
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Affiliation(s)
- W H Yu
- Department of Biochemistry and Molecular Biology, University of Miami School of Medicine, Miami, FL 33101, USA.
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Dees WL, Dearth RK, Hooper RN, Brinsko SP, Romano JE, Rahe H, Yu WH, McCann SM. Lamprey gonadotropin-releasing hormone-III selectively releases follicle stimulating hormone in the bovine. Domest Anim Endocrinol 2001; 20:279-88. [PMID: 11518621 DOI: 10.1016/s0739-7240(01)00099-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recent studies have shown that lamprey gonadotropin-releasing hormone (l-GnRH) is localized in the mammalian brain, and that l-GnRH-III, can selectively induce FSH secretion in the rat both in vivo and in vitro. Consequently, the purpose of this study was to determine if l-GnRH-III could elicit selective FSH release in cattle and compare this response with that to mammalian luteinizing hormone releasing hormone (m-LHRH). Cattle were chosen as the animal model because previous studies have demonstrated that FSH and LH are secreted by separate gonadotropes in that species. For these studies, crossbred cycling heifers were implanted with jugular cannulae and l-GnRH-III was infused either between Days 9-14 or on Day 20 of the estrous cycle. Blood samples were collected both before and following peptide infusion. Our results demonstrate that during Days 9-14 of the estrous cycle (luteal phase), when progesterone levels averaged between 4 and 5 ng/ml, a dose of 0.25 mg of l-GnRH-III induced the release of FSH (P < 0.05), but not LH. A 0.5 mg dose of l-GnRH-III caused a greater release of FSH (P < 0.01), but still did not induce LH release. Higher doses of the peptide were capable of significantly releasing both gonadotropins. Importantly, during the luteal phase, doses of 0.5 and 2 mg of m-LHRH were ineffective in stimulating FSH, but did elicit marked increases (P < 0.001) in LH. Again, progesterone levels averaged 4-5 pg/ml. In order to assess gonadotropin releasing ability of l-GnRH-III at a different phase of the estrous cycle, some animals were administered the peptide on Day 20, when progesterone levels were below 1.0 pg/ml. At this time, the l-GnRH-III induced the release of LH (P < 0.01), but not FSH. Overall, our results demonstrate that l-GnRH-III can selectively induce FSH in cattle during the luteal phase, whereas m-LHRH was ineffective in that regard. Furthermore, the fact that l-GnRH-III can selectively stimulate FSH when serum progesterone is high, and LH when serum progesterone is low, suggests its actions are under strong control of this steroid. We suggest the FSH releasing capacity of l-GnRH-III in cattle could render this peptide useful for enhancement of reproductive efficiency in this species.
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Affiliation(s)
- W L Dees
- Department of Veterinary Anatomy, Texas A&M University, College Station, TX, USA.
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McCann SM, Kimura M, Karanth S, Yu WH, Mastronardi CA, Rettori V. The mechanism of action of cytokines to control the release of hypothalamic and pituitary hormones in infection. Ann N Y Acad Sci 2001; 917:4-18. [PMID: 11268367 DOI: 10.1111/j.1749-6632.2000.tb05368.x] [Citation(s) in RCA: 94] [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: 01/22/2023]
Abstract
During infection, bacterial and viral products, such as bacterial lipopolysaccharide (LPS), cause the release of cytokines from immune cells. These cytokines can reach the brain by several routes. Furthermore, cytokines, such as interleukin-1 (IL-1), are induced in neurons within the brain by systemic injection of LPS. These cytokines determine the pattern of hypothalamic-pituitary secretion that characterizes infection. IL-2, by stimulation of cholinergic neurons, activates neural nitric oxide synthase (nNOS). The nitric oxide (NO) released diffuses into corticotropin-releasing hormone (CRH)-secreting neurons and releases CRH. IL-2 also acts in the pituitary to stimulate adrenocorticotropic hormone (ACTH) secretion. On the other hand, IL-1 alpha blocks the NO-induced release of luteinizing hormone-releasing hormone (LHRH) from LHRH neurons, thereby blocking pulsatile LH but not follicle-stimulating hormone (FSH) release and also inhibiting sex behavior that is induced by LHRH. IL-1 alpha and granulocyte macrophage colony-stimulating factor (GMCSF) block the response of the LHRH terminals to NO. The mechanism of action of GMCSF to inhibit LHRH release is as follows. It acts on its receptors on gamma-aminobutyric acid (GABA)ergic neurons to stimulate GABA release. GABA acts on GABAa receptors on the LHRH neuronal terminal to block NOergic stimulation of LHRH release. IL-1 alpha inhibits growth hormone (GH) release by inhibiting GH-releasing hormone (GHRH) release, which is mediated by NO, and stimulating somatostatin release, also mediated by NO. IL-1 alpha-induced stimulation of PRL release is also mediated by intrahypothlamic action of NO, which inhibits release of the PRL-inhibiting hormone dopamine. The actions of NO are brought about by its combined activation of guanylate cyclase-liberating cyclic guanosine monophosphate (cGMP) and activation of cyclooxygenase (COX) and lipoxygenase (LOX) with liberation of prostaglandin E2 and leukotrienes, respectively. Thus, NO plays a key role in inducing the changes in release of hypothalamic peptides induced in infection by cytokines. Cytokines, such as IL-1 beta, also act in the anterior pituitary gland, at least in part via induction of inducible NOS. The NO produced inhibits release of ACTH. The adipocyte hormone leptin, a member of the cytokine family, has largely opposite actions to those of the proinflammatory cytokines, stimulating the release of FSHRF and LHRH from the hypothalamus and FSH and LH from the pituitary directly by NO.
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Affiliation(s)
- S M McCann
- Pennington Biomedical Research Center (LSU), 6400 Perkins Road, Baton Rouge, LA 70808-4124, USA.
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Yu WH, Fraser PE. S100beta interaction with tau is promoted by zinc and inhibited by hyperphosphorylation in Alzheimer's disease. J Neurosci 2001; 21:2240-6. [PMID: 11264299 PMCID: PMC6762409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
Abstract
The zinc-binding protein S100beta has been identified as an interacting partner with the microtubule-associated protein tau. Both proteins are individually affected in Alzheimer's disease (AD). S100beta, is overexpressed in the disease, whereas hyperphosphorylated tau constitutes the primary component of neurofibrillary tangles. In this study, we examine factors that modulate their binding and the potential role the complex may play in AD pathogenesis. Zinc was identified as a critical component in the binding process and a primary modulator of S100beta-associated cellular responses. Abnormally phosphorylated tau extracted from AD tissue displayed a dramatically reduced capacity to bind S100beta, which was restored by pretreatment with alkaline phosphatase. In differentiated SH-SY5Y cells, exogenous S100beta was internalized and colocalized with tau consistent with an intracellular association. This was enhanced by the addition of zinc and eliminated by divalent metal chelators. S100beta uptake was also accompanied by extensive neurite outgrowth that may be mediated by its interaction with tau. S100beta-tau binding may represent a key pathway for neurite development, possibly through S100beta modulation of tau phosphorylation and/or functional stabilization of microtubules and process formation. S100beta-tau interaction may be disrupted by hyperphosphorylation and/or imbalances in zinc metabolism, and this may contribute to the neurite dystrophy associated with AD.
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Affiliation(s)
- W H Yu
- Centre for Research in Neurodegenerative Diseases, Department of Pharmacology, University of Toronto, Toronto, Ontario, Canada M5S 3H2.
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Abstract
Metallothionein III (MT-III) is a functionally distinct member of the metallothionein family that displays neuroinhibitory activity and is involved in the repair of neuronal damage. Altered expression levels of MT-III have been observed in Alzheimer's disease (AD) which has led to suggestions that it could be a mitigating factor in AD-related neuronal dysfunction. However, conflicting results have been reported on this issue which may be due to methodological differences and/or sampling size. In the current study, we have assessed MT-III expression in a large number of AD cases through the quantification of mRNA as well as by immunohistochemistry and Western blotting using an MT-III specific antibody. The results of this comprehensive study indicate that the mononucleosome DNA encoding MT-III is occluded preventing transcription and that message levels are reduced by approximately 30%. In addition, protein levels were specifically decreased by approximately 55% in temporal cortex. These data support the conclusion that MT-III is significantly downregulated in AD and may contribute to the loss of its protective effects and/or repair functions that lead to an exacerbation of the pathogenic processes.
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Affiliation(s)
- W H Yu
- Centre for Research in Neurodegenerative Diseases, University of Toronto, 6 Queen's Park Crescent West, Ontario M5S 3H2, Toronto, Canada.
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Mitsiades N, Yu WH, Poulaki V, Tsokos M, Stamenkovic I. Matrix metalloproteinase-7-mediated cleavage of Fas ligand protects tumor cells from chemotherapeutic drug cytotoxicity. Cancer Res 2001; 61:577-81. [PMID: 11212252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
Recent evidence suggests that one mechanism whereby cytotoxic drugs, such as doxorubicin, kill tumors is the induction or up-regulation of Fas ligand (FasL) expression on the tumor cell surface. The ensuing engagement of Fas by FasL on adjacent cells leads to apoptosis. However, despite cytotoxic drug-induced FasL expression, Fas-sensitive tumors frequently resist chemotherapy, suggesting that they may possess a mechanism that prevents or inactivates Fas-FasL interactions. In the present work, we addressed the involvement of the FasL/Fas signaling pathway in doxorubicin-induced apoptosis and the ability of matrix metalloproteinases (MMPs) to proteolytically cleave FasL in tumor cells. Doxorubicin-induced apoptosis was inhibited by expression of soluble Fas or incubation of the tumor cells with MMP-7 but not with MMP-2 or MMP-9. Resistance to doxorubicin was also induced by expression in the tumor cells of constitutively active MMP-7 but not of a catalytically inactive mutant. Conversely, inhibition of MMP-7 expression in tumor cells by transfection of MMP-7 cDNA in antisense orientation resulted in sensitization to doxorubicin. MMP-7 efficiently cleaved recombinant FasL in vitro and reduced cell surface FasL expression. Our observations provide evidence that one mechanism whereby MMP-7 may promote tumor survival and resistance to doxorubicin is by cleaving FasL and reducing its effectiveness in triggering Fas-mediated apoptosis.
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Affiliation(s)
- N Mitsiades
- Massachusetts General Hospital, and Department of Pathology, Harvard Medical School, Boston 02129, USA.
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Wang L, Bogerd J, Choi HS, Seong JY, Soh JM, Chun SY, Blomenröhr M, Troskie BE, Millar RP, Yu WH, McCann SM, Kwon HB. Three distinct types of GnRH receptor characterized in the bullfrog. Proc Natl Acad Sci U S A 2001; 98:361-6. [PMID: 11120886 PMCID: PMC14595 DOI: 10.1073/pnas.98.1.361] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
It has been proposed recently that two types of GnRH receptors (GnRHR) exist in a particular species. Here we present data demonstrating that at least three types of GnRHR are expressed in a single diploid species, the bullfrog. Three different cDNAs, encoding distinct types of bullfrog GnRHR (bfGnRHR-1, bfGnRHR-2, and bfGnRHR-3), were isolated from pituitary and hindbrain of the bullfrog. BfGnRHR-1 mRNA was expressed predominantly in pituitary, whereas bfGnRHR-2 and -3 mRNAs were expressed in brain. The bfGnRHR-1, bfGnRHR-2, and bfGnRHR-3 proteins have an amino acid identity of approximately 30% to approximately 35% with mammalian GnRHRs and approximately 40% to approximately 50% with nonmammalian GnRHRs. Interestingly, bfGnRHR-2 has an 85% amino acid homology with Xenopus GnRHR. Less than 53% amino acid identity was observed among the three bfGnRHRs. All isolated cDNAs encode functional receptors because their transient expression in COS-7 cells resulted in a ligand-dependent increase in inositol phosphate production. Notably, all three receptors exhibited a differential ligand selectivity. For all receptors, cGnRH-II has a higher potency than mGnRH. In addition, salmon GnRH also has a strikingly high potency to stimulate all three receptors. In conclusion, we demonstrated the presence of three GnRHRs in the bullfrog. Their expression in pituitary and brain suggests that bfGnRHRs play an important role in the regulation of reproductive functions in the bullfrog.
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MESH Headings
- Amino Acid Sequence
- Animals
- Blotting, Southern
- COS Cells
- Cloning, Molecular
- DNA Primers
- DNA, Complementary/genetics
- Gene Expression Regulation
- Humans
- Inositol Phosphates/metabolism
- Ligands
- Molecular Sequence Data
- Pituitary Gland/chemistry
- Protein Isoforms/chemistry
- Protein Isoforms/classification
- Protein Isoforms/genetics
- Protein Isoforms/metabolism
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Rana catesbeiana/genetics
- Receptors, LHRH/chemistry
- Receptors, LHRH/classification
- Receptors, LHRH/genetics
- Receptors, LHRH/metabolism
- Rhombencephalon/chemistry
- Sequence Alignment
- Sequence Homology, Amino Acid
- Substrate Specificity
- Transfection
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Affiliation(s)
- L Wang
- Hormone Research Center and Department of Biology, Chonnam National University, Kwangju 500-757, Republic of Korea
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Affiliation(s)
- S M McCann
- Pennington Biomedical Research Center, Louisiana State University, Baton Rouge 70808-4124, USA
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Abstract
This study compared AR proteins in four cranial nerve motor nuclei among male and female rats that were intact, gonadectomized, or gonadectomized and given TP by immunohistochemistry. AR-immunoreactive (ir) neurons were found, in descending order of abundance, in the nucleus ambiguus, hypoglossal nucleus, and the facial and trigeminal motor nuclei of both males and females of intact and gonadectomized plus TP rats. Virtually every neuron of the nucleus ambiguus was AR-ir. In contrast, AR-ir neurons were either restricted to a specific area of the hypoglossal nucleus, or randomly distributed in the facial and trigeminal motor nuclei. The predominant AR-ir site shifted from cell nuclei to the cytoplasm, depending upon the presence or absence of ligand. Sex differences in the amount and staining intensity of AR-ir neurons were discernable in all four motor nuclei of intact rats, and these differences were maintained in gonadectomized plus TP rats, with the exception of the nucleus ambiguus. The immunostaining results were complemented by results from AR binding studies. Cytosolic AR binding values for the hypoglossal and facial motor nuclei of females were only approximately 50% of those of males despite the absence of a sex difference in neuron number. These results indicate that intrinsic sex differences in AR levels and androgenic regulation of AR exist in cranial nerve motor nuclei, and that there are differences in the abundance and distribution pattern of AR responsive neurons in cranial nerve motor nuclei. These results are consistent with the idea that sex differences in AR could account for sex differences observed in nerve regeneration and neuron loss following cranial nerve injury.
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Affiliation(s)
- W H Yu
- Department of Cell Biology and Anatomical Sciences, City University of New York Medical School, New York, New York 10031, USA.
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Abstract
OBJECTIVE Lipopolysaccharide (LPS) injection in mammals orchestrates the release of many proinflammatory and anti-inflammatory cytokines. Intravenous administration of 0.2 mg/kg of LPS into unanesthetized rats with indwelling jugular catheters provoked a rapid, 50-fold increase in plasma tumor necrosis factor (TNF)-alpha within 30 min, which declined by 60% by 120 min. To test our hypothesis that such a rapid increase of TNF-alpha would be either neurally or hormonally controlled, the effect on TNF-alpha release of anesthesia (ketamine/acepromazine/xylazine) and catecholaminergic agonists and antagonists, either alone or in the presence of LPS, was determined. METHODS Rats bearing indwelling external jugular catheters were injected with the test drug or saline after removal of 0.6 ml of blood (-10 min). At time zero, LPS or saline was administered. Thereafter, blood samples were drawn at 15, 30, 120, 240 and 360 min. TNF-alpha was measured by immunoassay. RESULTS Among all the drugs tested, only propranolol increased plasma TNF-alpha. Anesthesia significantly blunted the LPS-induced TNF-alpha peak by 50%. Isoproterenol, a beta-adrenergic agonist, also blocked LPS-induced TNF-alpha release by 70% at 30 min and 90% at 120 min. On the contrary, propranolol, a beta-receptor blocker, induced a highly significant 3-fold increase in plasma TNF-alpha concentrations at 30 min and augmented the response to LPS 2-fold after endotoxin injection. Phentolamine, an alpha-receptor blocker, decreased the LPS-induced TNF-alpha release by 57% at 30 min. Similarly, alpha-bromoergocryptine, a dopamine D2 receptor agonist, decreased the LPS-induced TNF-alpha peak by 70% at 30 min and 50% at 120 min. CONCLUSIONS We conclude that TNF-alpha is at least in part neurally controlled since the anesthetic blocked its response to LPS. The fact that isoproterenol decreased the LPS-induced TNF-alpha release, whereas propranolol augmented basal and LPS-induced release suggests that the sympathetic nervous system inhibits basal and LPS-stimulated TNF-alpha release via beta-adrenergic receptors. Since phentolamine blocked LPS-induced release, this release may be induced, in part at least, by LPS-stimulated adrenergic drive acting on alpha-adrenergic receptors. The suppressive action of bromoergocryptine, a dopamine D2 receptor agonist, on LPS-induced TNF-alpha release may be mediated in part by suppression of prolactin release, which triggers TNF-alpha release.
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Affiliation(s)
- C A Mastronardi
- Pennington Biomedical Research Center, Lousiana State University, Baton Rouge, LA 70808-4124, USA
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