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Cheng XF, Zhao F, Chen D, Liu FL. Current landscape of preoperative neoadjuvant therapies for initial resectable colorectal cancer liver metastasis. World J Gastroenterol 2024; 30:663-672. [PMID: 38515943 PMCID: PMC10950626 DOI: 10.3748/wjg.v30.i7.663] [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] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 12/22/2023] [Accepted: 01/22/2024] [Indexed: 02/21/2024] Open
Abstract
Colorectal cancer liver metastasis (CRLM) presents a clinical challenge, and optimizing treatment strategies is crucial for improving patient outcomes. Surgical resection, a key element in achieving prolonged survival, is often linked to a heightened risk of recurrence. Acknowledging the potential benefits of preoperative neoadjuvant chemotherapy in managing resectable liver metastases, this approach has gained attention for its role in tumor downsizing, assessing biological behavior, and reducing the risk of postoperative recurrence. However, the use of neoadjuvant chemotherapy in initially resectable CRLM sparks ongoing debates. The balance between tumor reduction and the risk of hepatic injury, coupled with concerns about delaying surgery, necessitates a nuanced approach. This article explores recent research insights and draws upon the practical experiences at our center to address critical issues regarding considerations for initially resectable cases. Examining the criteria for patient selection and the judicious choice of neoadjuvant regimens are pivotal areas of discussion. Striking the right balance between maximizing treatment efficacy and minimizing adverse effects is imperative. The dynamic landscape of precision medicine is also reflected in the evolving role of gene testing, such as RAS/BRAF and PIK3CA, in tailoring neoadjuvant regimens. Furthermore, the review emphasizes the need for a multidisciplinary approach to navigate the complexities of CRLM. Integrating technical expertise and biological insights is crucial in refining neoadjuvant strategies. The management of progression following neoadjuvant chemotherapy requires a tailored approach, acknowledging the diverse biological behaviors that may emerge. In conclusion, this review aims to provide a comprehensive perspective on the considerations, challenges, and advancements in the use of neoadjuvant chemotherapy for initially resectable CRLM. By combining evidence-based insights with practical experiences, we aspire to contribute to the ongoing discourse on refining treatment paradigms for improved outcomes in patients with CRLM.
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Affiliation(s)
- Xiao-Fei Cheng
- Department of Colorectal Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, Zhejiang Province, China
| | - Feng Zhao
- Department of Radiation Oncology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, Zhejiang Province, China
| | - Dong Chen
- Department of Colorectal Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, Zhejiang Province, China
| | - Fan-Long Liu
- Department of Colorectal Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, Zhejiang Province, China
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Huang ZN, Wang ZY, Cheng XF, Huang ZZ, Han YL, Cui YZ, Liu B, Tian W. Melatonin alleviates oxidative stress-induced injury to nucleus pulposus-derived mesenchymal stem cells through activating PI3K/Akt pathway. J Orthop Translat 2023; 43:66-84. [PMID: 38089645 PMCID: PMC10711395 DOI: 10.1016/j.jot.2023.10.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 09/23/2023] [Accepted: 10/10/2023] [Indexed: 03/22/2024] Open
Abstract
BACKGROUND The changes in the microenvironment of degenerative intervertebral discs cause oxidative stress injury and excessive apoptosis of intervertebral disc endogenous stem cells. The purpose of this study was to explore the possible mechanism of the protective effect of melatonin on oxidative stress injury in NPMSCs induced by H2O2. METHODS The Cell Counting Kit-8 assay was used to evaluate the cytotoxicity of hydrogen peroxide and the protective effects of melatonin. ROS content was detected by 2'7'-dichlorofluorescin diacetate (DCFH-DA). Mitochondrial membrane potential (MMP) was detected by the JC-1assay. Transferase mediated d-UTP Nick end labeling (TUNEL) and Annexin V/PI double staining were used to determine the apoptosis rate. Additionally, apoptosis-associated proteins and PI3K/Akt signaling pathway-related proteins were evaluated by immunofluorescence, immunoblotting and PCR. ECMs were evaluated by RT‒PCR and immunofluorescence. In vivo, X-ray, Magnetic resonance imaging (MRI) and Histological analyses were used to evaluate the protective effect of melatonin. RESULTS Melatonin had an obvious protective effect on NPMSCs treated with 0-10 μM melatonin for 24 h. In addition, melatonin also had obvious protective effects on mitochondrial dysfunction, decreased membrane potential and cell senescence induced by H2O2. More importantly, melatonin could significantly reduce the apoptosis of nucleus pulposus mesenchymal stem cells induced by H2O2 by regulating the expression of apoptosis-related proteins and decreasing the rate of apoptosis. After treatment with melatonin, the PI3K/Akt pathway was significantly activated in nucleus pulposus mesenchymal stem cells, while the protective effect was significantly weakened after PI3K-IN-1 treatment. In vivo, the results of X-ray, MRI and histological analyses showed that therapy with melatonin could partially reduce the degree of intervertebral disc degeneration. CONCLUSION Our research demonstrated that melatonin can effectively alleviate the excessive apoptosis and mitochondrial dysfunction of nucleus pulposus mesenchymal stem cells induced by oxidative stress via the PI3K/Akt pathway, which provides a novel idea for the therapy of intervertebral disc degeneration. THE TRANSLATIONAL POTENTIAL OF THIS ARTICLE This study indicates that melatonin can effectively alleviate the excessive apoptosis and mitochondrial dysfunction of NPMSCs through activating the PI3K/Akt pathway. Melatonin might serve as a promising candidate for the prevention and treatment of Intervertebral disc degeneration disease (IVDD) in the future.
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Affiliation(s)
- Ze-Nan Huang
- Department of Orthopedics, Shandong First Medical University & Shandong Academy of Medical Science, Shandong, 200072, China
- Department of Spine Surgery, Beijing Jishuitan Hospital, The Fourth Clinical Hospital Affiliated to Peking University, No. 37 Xinjiekou East, Road, Beijing, 100035, China
| | - Ze-Yu Wang
- Department of Orthopedics, The Affiliated BenQ Hospital of Nanjing Medical University, 210019, Nanjing, Jiangsu Province, China
| | - Xiao-Fei Cheng
- Department of Orthopedic Surgery, Shanghai Key Laboratory of Orthopedics Implants, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200011, China
| | - Zhao-Zhang Huang
- Taixing Medical Center, Taixing People's Hospital, Taixing, 225400, Jiangsu Province, China
| | - Yan-Ling Han
- Medical Experimental Research Center, Yangzhou University, Yangzhou, 225001, China
| | - Ya-Zhou Cui
- Department of Orthopedics, Shandong First Medical University & Shandong Academy of Medical Science, Shandong, 200072, China
| | - Bo Liu
- Department of Spine Surgery, Beijing Jishuitan Hospital, The Fourth Clinical Hospital Affiliated to Peking University, No. 37 Xinjiekou East, Road, Beijing, 100035, China
| | - Wei Tian
- Department of Spine Surgery, Beijing Jishuitan Hospital, The Fourth Clinical Hospital Affiliated to Peking University, No. 37 Xinjiekou East, Road, Beijing, 100035, China
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Zhao WJ, Liu X, Hu M, Zhang Y, Shi PZ, Wang JW, Lu XH, Cheng XF, Tao YP, Feng XM, Wang YX, Zhang L. Quercetin ameliorates oxidative stress-induced senescence in rat nucleus pulposus-derived mesenchymal stem cells via the miR-34a-5p/SIRT1 axis. World J Stem Cells 2023; 15:842-865. [PMID: 37700818 PMCID: PMC10494568 DOI: 10.4252/wjsc.v15.i8.842] [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] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 05/25/2023] [Accepted: 06/27/2023] [Indexed: 08/25/2023] Open
Abstract
BACKGROUND Intervertebral disc degeneration (IDD) is a main contributor to low back pain. Oxidative stress, which is highly associated with the progression of IDD, increases senescence of nucleus pulposus-derived mesenchymal stem cells (NPMSCs) and weakens the differentiation ability of NPMSCs in degenerated intervertebral discs (IVDs). Quercetin (Que) has been demonstrated to reduce oxidative stress in diverse degenerative diseases. AIM To investigate the role of Que in oxidative stress-induced NPMSC damage and to elucidate the underlying mechanism. METHODS In vitro, NPMSCs were isolated from rat tails. Senescence-associated β-galactosidase (SA-β-Gal) staining, cell cycle, reactive oxygen species (ROS), real-time quantitative polymerase chain reaction (RT-qPCR), immunofluorescence, and western blot analyses were used to evaluated the protective effects of Que. Meanwhile the relationship between miR-34a-5p and Sirtuins 1 (SIRT1) was evaluated by dual-luciferase reporter assay. To explore whether Que modulates tert-butyl hydroperoxide (TBHP)-induced senescence of NPMSCs via the miR-34a-5p/SIRT1 pathway, we used adenovirus vectors to overexpress and downregulate the expression of miR-34a-5p and used SIRT1 siRNA to knockdown SIRT1 expression. In vivo, a puncture-induced rat IDD model was constructed, and X rays and histological analysis were used to assess whether Que could alleviate IDD in vivo. RESULTS We found that TBHP can cause NPMSCs senescence changes, such as reduced cell proliferation ability, increased SA-β-Gal activity, cell cycle arrest, the accumulation of ROS, and increased expression of senescence-related proteins. While abovementioned senescence indicators were significantly alleviated by Que treatment. Que decreased the expression levels of senescence-related proteins (p16, p21, and p53) and senescence-associated secreted phenotype (SASP), including IL-1β, IL-6, and MMP-13, and it increased the expression of SIRT1. In addition, the protective effects of Que on cell senescence were partially reversed by miR-34a-5p overexpression and SIRT1 knockdown. In vivo, X-ray, and histological analyses indicated that Que alleviated IDD in a puncture-induced rat model. CONCLUSION In summary, the present study provides evidence that Que reduces oxidative stress-induced senescence of NPMSCs via the miR-34a/SIRT1 signaling pathway, suggesting that Que may be a potential agent for the treatment of IDD.
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Affiliation(s)
- Wen-Jie Zhao
- Graduate School, Dalian Medical University, Dalian 116044, Liaoning Province, China
| | - Xin Liu
- Department of Orthopedics, Clinical Medical College, Yangzhou University, Yangzhou 225001, Jiangsu Province, China
| | - Man Hu
- Graduate School, Dalian Medical University, Dalian 116044, Liaoning Province, China
| | - Yu Zhang
- Department of Orthopedics, Clinical Medical College, Yangzhou University, Yangzhou 225001, Jiangsu Province, China
| | - Peng-Zhi Shi
- Graduate School, Dalian Medical University, Dalian 116044, Liaoning Province, China
| | - Jun-Wu Wang
- Department of Orthopedics, Clinical Medical College, Yangzhou University, Yangzhou 225001, Jiangsu Province, China
| | - Xu-Hua Lu
- Department of Orthopedics, Changzheng Hospital of The Second Military Medical University, Shanghai 200003, China
| | - Xiao-Fei Cheng
- Department of Orthopedic Surgery, Shanghai Key Laboratory of Orthopedics Implants, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200011, China
| | - Yu-Ping Tao
- Department of Orthopedics, Clinical Medical College, Yangzhou University, Yangzhou 225001, Jiangsu Province, China
| | - Xin-Min Feng
- Department of Orthopedics, Clinical Medical College, Yangzhou University, Yangzhou 225001, Jiangsu Province, China
| | - Yong-Xiang Wang
- Department of Orthopedics, Clinical Medical College, Yangzhou University, Yangzhou 225001, Jiangsu Province, China
| | - Liang Zhang
- Department of Orthopedics, Clinical Medical College, Yangzhou University, Yangzhou 225001, Jiangsu Province, China.
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Zhang K, Wang X, Zeng LT, Yang X, Cheng XF, Tian HJ, Chen C, Sun XJ, Zhao CQ, Ma H, Zhao J. Circular RNA PDK1 targets miR-4731-5p to enhance TNXB expression in ligamentum flavum hypertrophy. FASEB J 2023; 37:e22877. [PMID: 37014317 DOI: 10.1096/fj.202200022rr] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 02/08/2023] [Accepted: 03/02/2023] [Indexed: 04/05/2023]
Abstract
Hypertrophic ligamentum flavum (LF) is a main factor responsible for lumbar spinal stenosis (LSS); however, the exact mechanisms of the pathogenesis of these processes remain unknown. This study aimed to elucidate whether circular RNAs and microRNAs regulate the pathogenesis of LF and LSS, especially focusing on circPDK1 (hsa_circ_0057105), a circRNA targeting pyruvate dehydrogenase kinase 1 and differentially expressed in LF tissues between lumbar disk herniation and LSS patients. The circPDK1/miR-4731 and miR-4731/TNXB (Tenascin XB) interactions were predicted and validated by luciferase reporter assay. Colony formation, wound-healing, and MTT assays were used for estimating cell proliferation and migration. Protein expression levels were evaluated using Western blotting. TNXB expression was verified using immunohistochemistry (IHC). Overexpressing circPDK1 promoted the proliferation, migration, and expression of fibrosis-related protein (alpha smooth muscle actin (α-SMA), lysyl oxidase like 2 (LOXL2), Collagen I, matrix metalloproteinase-2 (MMP-2) and TNXB) in LF whereas miR-4731-5p showed opposite effects. The expression of TNXB was promoted by circPDK1; contrary results were observed with miR-4731-5p. Co-overexpression of miR-4731-5p partially reversed the proliferative and fibrosis-prompting effects of circPDK1 or TNXB. The circPDK1-miR-4731-TNXB pathway may be proposed as a regulatory axis in LF hypertrophy, which might shed light on in-depth research of LSS, as well as providing a novel therapeutic target for LF hypertrophy-induced LSS.
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Affiliation(s)
- Kai Zhang
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopedics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xin Wang
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopedics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Li-Ting Zeng
- Department of Emergency, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiao Yang
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopedics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiao-Fei Cheng
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopedics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hai-Jun Tian
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopedics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chen Chen
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopedics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiao-Jiang Sun
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopedics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chang-Qing Zhao
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopedics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hui Ma
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopedics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jie Zhao
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopedics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Chen D, Lu MM, Wang JH, Ren Y, Xu LL, Cheng WX, Wang SS, Li XL, Cheng XF, Gao JG, Kalyani FS, Jin X. High-fat diet aggravates colitis via mesenteric adipose tissue derived exosome metastasis-associated lung adenocarcinoma transcript 1. World J Gastroenterol 2022; 28:3838-3853. [PMID: 36157545 PMCID: PMC9367221 DOI: 10.3748/wjg.v28.i29.3838] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2021] [Revised: 04/28/2022] [Accepted: 07/06/2022] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Obesity is associated with an increased risk of developing Crohn’s disease (CD), higher disease activity, and comparatively worse clinical outcomes.
AIM To investigate the role of mesenteric adipose tissue-derived exosomes in the pathogenesis of CD aggravation in obese individuals.
METHODS First, we induced colitis in mice initiated on high-fat and normal diets and compared the severity of colitis. We then extracted and identified exosomes from mesenteric adipose tissue and determined the levels of metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) in mesenteric adipose tissue-derived exosomes and the colon. Next, we demonstrated an interaction between MALAT1 and the miR-15a-5p/activating transcription factor 6 (ATF6) axis. Finally, we explored the effects of mesenteric adipose tissue-derived exosomes extracted from mice fed a high-fat or normal diet on the severity of 2,4,6-trinitrobe-nzenesulfonic acid (TNBS)-induced colitis and ATF6-related endoplasmic reticulum stress pathways.
RESULTS High-fat diet was found to aggravate TNBS-induced colitis in mice. The expression of MALAT1 in mesenteric adipose tissue-derived exosomes of high-fat diet-fed mice increased. The increased expression of MALAT1 in colon tissue exacerbated TNBS-induced colitis and activated the ATF6 endoplasmic reticulum stress pathway. This effect was partially reversed by the reduced expression of MALAT1 and overexpression of miR-15a-5p.
CONCLUSION Mesenteric adipose tissue-derived exosome-encapsulated long noncoding RNAs MALAT1 targets the colon and aggravates TNBS-induced colitis in obese mice, which may potentially act on the miR-15a-5p/ATF6 axis and activate endoplasmic reticulum stress.
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Affiliation(s)
- Dong Chen
- Department of Colorectal Surgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310003, Zhejiang Province, China
| | - Miao-Miao Lu
- Department of Medicine, Zhejiang University School of Medicine, Hangzhou 310003, Zhejiang Province, China
| | - Jin-Hai Wang
- Department of Colorectal Surgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310003, Zhejiang Province, China
| | - Yue Ren
- Department of Medicine, Zhejiang University School of Medicine, Hangzhou 310003, Zhejiang Province, China
| | - Ling-Ling Xu
- Department of Medicine, Zhejiang University School of Medicine, Hangzhou 310003, Zhejiang Province, China
| | - Wei-Xin Cheng
- Department of Medicine, Zhejiang University School of Medicine, Hangzhou 310003, Zhejiang Province, China
| | - Sai-Sai Wang
- Department of Colorectal Surgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310003, Zhejiang Province, China
| | - Xiao-Lin Li
- Department of Emergency, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310003, Zhejiang Province, China
| | - Xiao-Fei Cheng
- Department of Colorectal Surgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310003, Zhejiang Province, China
| | - Jian-Guo Gao
- Department of Gastroenterology, The First affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310003, Zhejiang Province, China
| | - Farhin Shaheed Kalyani
- Department of Medicine, Zhejiang University School of Medicine, Hangzhou 310003, Zhejiang Province, China
| | - Xi Jin
- Department of Gastroenterology, The First affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310003, Zhejiang Province, China
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Shi PZ, Wang JW, Wang PC, Han B, Lu XH, Ren YX, Feng XM, Cheng XF, Zhang L. Urolithin a alleviates oxidative stress-induced senescence in nucleus pulposus-derived mesenchymal stem cells through SIRT1/PGC-1α pathway. World J Stem Cells 2021; 13:1928-1946. [PMID: 35069991 PMCID: PMC8727228 DOI: 10.4252/wjsc.v13.i12.1928] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 08/12/2021] [Accepted: 11/28/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND In degenerative intervertebral disc (IVD), an unfavorable IVD environment leads to increased senescence of nucleus pulposus (NP)-derived mesenchymal stem cells (NPMSCs) and the inability to complete the differentiation from NPMSCs to NP cells, leading to further aggravation of IVD degeneration (IDD). Urolithin A (UA) has been proven to have obvious effects in delaying cell senescence and resisting oxidative stress.
AIM To explore whether UA can alleviate NPMSCs senescence and to elucidate the underlying mechanism.
METHODS In vitro, we harvested NPMSCs from rat tails, and divided NPMSCs into four groups: the control group, H2O2 group, H2O2 + UA group, and H2O2 + UA + SR-18292 group. Senescence-associated β-Galactosidase (SA-β-Gal) activity, cell cycle, cell proliferation ability, and the expression of senescence-related and silent information regulator of transcription 1/PPAR gamma coactivator-1α (SIRT1/ PGC-1α) pathway-related proteins and mRNA were used to evaluate the protective effects of UA. In vivo, an animal model of IDD was constructed, and X-rays, magnetic resonance imaging, and histological analysis were used to assess whether UA could alleviate IDD in vivo.
RESULTS We found that H2O2 can cause NPMSCs senescence changes, such as cell cycle arrest, reduced cell proliferation ability, increased SA-β-Gal activity, and increased expression of senescence-related proteins and mRNA. After UA pretreatment, the abovementioned senescence indicators were significantly alleviated. To further demonstrate the mechanism of UA, we evaluated the mitochondrial membrane potential and the SIRT1/PGC-1α pathway that regulates mitochondrial function. UA protected mitochondrial function and delayed NPMSCs senescence by activating the SIRT1/PGC-1α pathway. In vivo, we found that UA treatment alleviated an animal model of IDD by assessing the disc height index, Pfirrmann grade and the histological score.
CONCLUSION In summary, UA could activate the SIRT1/PGC-1α signaling pathway to protect mitochondrial function and alleviate cell senescence and IDD in vivo and vitro.
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Affiliation(s)
- Peng-Zhi Shi
- Department of Orthopedic, Dalian Medical University, Dalian 116000, Liaoning Province, China
| | - Jun-Wu Wang
- Department of Orthopedics, Clinical Medical College of Yangzhou University, Yangzhou 225000, Jiangsu Province, China
| | - Ping-Chuan Wang
- Department of Orthopedics, Clinical Medical College of Yangzhou University, Yangzhou 225000, Jiangsu Province, China
| | - Bo Han
- Department of Orthopedic, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
| | - Xu-Hua Lu
- Department of Orthopedics, Changzheng Hospital of The Second Military Medical University, Shanghai 200003, China
| | - Yong-Xin Ren
- Department of Orthopedics, First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu Province, China
| | - Xin-Min Feng
- Department of Orthopedics, Clinical Medical College of Yangzhou University, Yangzhou 225000, Jiangsu Province, China
| | - Xiao-Fei Cheng
- Department of Orthopedic Surgery, Shanghai Key Laboratory of Orthopedics Implants, Shanghai Ninth People’s Hospital, Shanghai JiaoTong University School of Medicine, Shanghai 200011, China
| | - Liang Zhang
- Department of Orthopedics, Clinical Medical College of Yangzhou University, Yangzhou 225000, Jiangsu Province, China
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Wu YA, Gao JW, Cheng XF, Xie M, Yuan XP, Liu D, Song R. Characterization and comparative analysis of the complete mitochondrial genome of Azygia hwangtsiyui Tsin, 1933 (Digenea), the first for a member of the family Azygiidae. Zookeys 2020; 945:1-16. [PMID: 32714004 PMCID: PMC7351859 DOI: 10.3897/zookeys.945.49681] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 12/26/2019] [Accepted: 05/04/2020] [Indexed: 02/07/2023] Open
Abstract
Azygia hwangtsiyui (Trematoda, Azygiidae), a neglected parasite of predatory fishes, is little-known in terms of its molecular epidemiology, population ecology and phylogenetic study. In the present study, the complete mitochondrial genome of A. hwangtsiyui was sequenced and characterized: it is a 13,973 bp circular DNA molecule and encodes 36 genes (12 protein-coding genes, 22 transfer RNA genes, two ribosomal RNA genes) as well as two non-coding regions. The A+T content of the A. hwangtsiyui mitogenome is 59.6% and displays a remarkable bias in nucleotide composition with a negative AT skew (-0.437) and a positive GC skew (0.408). Phylogenetic analysis based on concatenated amino acid sequences of twelve protein-coding genes reveals that A. hwangtsiyui is placed in a separate clade, suggesting that it has no close relationship with any other trematode family. This is the first characterization of the A. hwangtsiyui mitogenome, and the first reported mitogenome of the family Azygiidae. These novel datasets of the A. hwangtsiyui mt genome represent a meaningful resource for the development of mitochondrial markers for the identification, diagnostics, taxonomy, homology and phylogenetic relationships of trematodes.
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Affiliation(s)
- Yuan-An Wu
- Hunan Fisheries Science Institute, Changsha 410153, ChinaHunan Fisheries Science InstituteChangshaChina
| | - Jin-Wei Gao
- Hunan Fisheries Science Institute, Changsha 410153, ChinaHunan Fisheries Science InstituteChangshaChina
| | - Xiao-Fei Cheng
- Hunan Fisheries Science Institute, Changsha 410153, ChinaHunan Fisheries Science InstituteChangshaChina
| | - Min Xie
- Hunan Fisheries Science Institute, Changsha 410153, ChinaHunan Fisheries Science InstituteChangshaChina
| | - Xi-Ping Yuan
- Hunan Fisheries Science Institute, Changsha 410153, ChinaHunan Fisheries Science InstituteChangshaChina
| | - Dong Liu
- Hunan Fisheries Science Institute, Changsha 410153, ChinaHunan Fisheries Science InstituteChangshaChina
| | - Rui Song
- Hunan Fisheries Science Institute, Changsha 410153, ChinaHunan Fisheries Science InstituteChangshaChina
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Chen F, Liu ZS, Zhang FR, Xiong RH, Chen Y, Cheng XF, Wang WY, Ren J. [First case of severe childhood novel coronavirus pneumonia in China]. Zhonghua Er Ke Za Zhi 2020; 58:179-182. [PMID: 32135586 DOI: 10.3760/cma.j.issn.0578-1310.2020.03.003] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- F Chen
- Intensive Care Unit, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
| | - Z S Liu
- Intensive Care Unit, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
| | - F R Zhang
- Intensive Care Unit, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
| | - R H Xiong
- Intensive Care Unit, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
| | - Y Chen
- Intensive Care Unit, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
| | - X F Cheng
- Intensive Care Unit, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
| | - W Y Wang
- Intensive Care Unit, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
| | - J Ren
- Intensive Care Unit, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
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Chen F, Liu ZS, Zhang FR, Xiong RH, Chen Y, Cheng XF, Wang WY, Ren J. [First case of severe childhood novel coronavirus pneumonia in China]. Zhonghua Er Ke Za Zhi 2020; 58:E005. [PMID: 32045966 DOI: 10.3760/cma.j.issn.0578-1310.2020.0005] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- F Chen
- Intensive Care Unit, Wuhan Children's Hospital , Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
| | - Z S Liu
- Intensive Care Unit, Wuhan Children's Hospital , Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
| | - F R Zhang
- Intensive Care Unit, Wuhan Children's Hospital , Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
| | - R H Xiong
- Intensive Care Unit, Wuhan Children's Hospital , Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
| | - Y Chen
- Intensive Care Unit, Wuhan Children's Hospital , Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
| | - X F Cheng
- Intensive Care Unit, Wuhan Children's Hospital , Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
| | - W Y Wang
- Intensive Care Unit, Wuhan Children's Hospital , Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
| | - J Ren
- Intensive Care Unit, Wuhan Children's Hospital , Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430016, China
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Xu XM, Zhao F, Cheng XF, Zhong WX, Liu JP, Jiang WQ, Yu XK, Lin JJ. Adult sacrococcygeal teratoma: a retrospective study over eight years at a single institution. J Zhejiang Univ Sci B 2020; 20:670-678. [PMID: 31273964 DOI: 10.1631/jzus.b1800621] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
OBJECTIVE To determine the clinical, imaging, and histological features, and surgical resection modalities and outcomes of adult sacrococcygeal teratoma (SCT). METHODS Adult patients with histopathologically diagnosed SCT were enrolled in our hospital between August 2010 and August 2018. Each patient's characteristics and clinical information were reviewed. RESULTS There were 8 patients in the study (2 males, 6 females) with a median age of 34 years (range, 18-67 years). The time to clinical symptoms was 14 d to 35 years, with a median time of 4 years. Six patients presented with symptoms of sacrococcygeal pain, and four with signs of sacrococcygeal mass and ulceration in the sacrococcygeal region. Six patients were evaluated using a combination of computed tomography (CT) and magnetic resonance imaging (MRI). All patients showed a presacral tumor with heterogeneous intensity on CT images. All patients underwent surgical treatment, including 6 parasacral, 1 transabdominal, and 1 combined anterior-posterior surgery cases. Seven patients were histopathologically diagnosed with benign mature SCT, and have shown no recurrence. One patient had malignant SCT, with recurrence at 84 months after surgery. After a second surgery, the patient had no recurrence within 6 months follow-up after re-resection. CONCLUSIONS Our retrospective study demonstrated: (1) adult SCT is difficult to diagnose because of a lack of typical clinical symptoms and signs; (2) a combination of CT and MRI examination is beneficial for preoperative diagnosis; (3) the choice of surgical approach and surgical resection modality depends on the size, location, and components of the tumor, which can be defined from preoperative CT and MRI evaluation; (4) most adult SCTs are benign; the surgical outcome for the malignant SCT patient was good after complete resection. Even for the patient with recurrent malignant SCT, the surgical outcome was good after re-resection.
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Affiliation(s)
- Xiang-Ming Xu
- Department of Colorectal Surgery, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310003, China
| | - Feng Zhao
- Department of Radiation Oncology, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310003, China
| | - Xiao-Fei Cheng
- Department of Colorectal Surgery, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310003, China
| | - Wei-Xiang Zhong
- Department of Pathology, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310003, China
| | - Jing-Peng Liu
- Department of Radiology, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310003, China
| | - Wei-Qin Jiang
- Cancer Biotherapy Center, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310003, China
| | - Xiao-Kai Yu
- Department of Radiation Oncology, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310003, China
| | - Jian-Jiang Lin
- Department of Colorectal Surgery, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310003, China
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Song R, Zhang D, Gao JW, Cheng XF, Xie M, Li H, Wu YA. Characterization of the complete mitochondrial genome of Brentisentisyangtzensis Yu & Wu, 1989 (Acanthocephala, Illiosentidae). Zookeys 2019; 861:1-14. [PMID: 31363345 PMCID: PMC6656981 DOI: 10.3897/zookeys.861.34809] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Accepted: 05/31/2019] [Indexed: 11/12/2022] Open
Abstract
The mitogenome of Brentisentisyangtzensis is 13,864 bp in length and has the circular structure typical of metazoans. It contains 36 genes: 22 transfer RNA genes (tRNAs), two ribosomal RNA genes (rRNAs) and 12 protein-encoding genes (PCGs). All genes are transcribed from the same strand. Thirteen overlapping regions were found in the mitochondrial genome. The overall A+T content of B.yangtzensis is 68.3% versus 31.7% of G+C content (A = 27.8%, T = 40.5%, C = 9.0%, G = 22.7%). B.yangtzenensis (Illiosentidae) and Leptorhynchoidesthecatus (Rhadinorhynchidae) form a sister clade, showing the relatively close relationship between the Illiosentidae and the Rhadinorhynchidae. The mitochondrial gene arrangements of acanthocephalan species are relatively conserved, with only a few translocations of tRNAs (trnS1, trnS2, trnV, and trnK) detected. An identical gene order was found both in a sister clade (Centrorhynchusaluconis and Plagiorhynchustransversus) and across different classes (B.yangtzensis (Palaeacanthocephala), Acanthosentischeni (Eoacanthocephala) and Macracanthorhynchushirudinaceus (Archiacanthocephala), Oncicolaluehei and L.thecatus (Palaeacanthocephala)). More studies and more sequences of acanthocephalan species are needed to gain a clear understanding of the phylogenetic relationships.
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Affiliation(s)
- Rui Song
- Hunan Fisheries Science Institute, Changsha 410153, ChinaHunan Fisheries Science InstituteChangshaChina
- Collaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan Province, Changde, 415000, ChinaCollaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan ProvinceChangdeChina
| | - Dong Zhang
- Key Laboratory of Aquaculture Disease Control, Ministry of Agriculture, and State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, ChinaInstitute of Hydrobiology, Chinese Academy of SciencesWuhanChina
| | - Jin-Wei Gao
- Hunan Fisheries Science Institute, Changsha 410153, ChinaHunan Fisheries Science InstituteChangshaChina
| | - Xiao-Fei Cheng
- Hunan Fisheries Science Institute, Changsha 410153, ChinaHunan Fisheries Science InstituteChangshaChina
| | - Min Xie
- Hunan Fisheries Science Institute, Changsha 410153, ChinaHunan Fisheries Science InstituteChangshaChina
| | - Hong Li
- Hunan Fisheries Science Institute, Changsha 410153, ChinaHunan Fisheries Science InstituteChangshaChina
| | - Yuan-An Wu
- Hunan Fisheries Science Institute, Changsha 410153, ChinaHunan Fisheries Science InstituteChangshaChina
- Collaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan Province, Changde, 415000, ChinaCollaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan ProvinceChangdeChina
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He Y, Cheng XF, Wang K, Liu T, Fan HP, Pan WX, He PX, Jin J. Predictive value of combining the SYNTAX score with reactive hyperemia index in patients with acute coronary syndrome undergoing percutaneous coronary intervention. Catheter Cardiovasc Interv 2019; 95:E130-E139. [PMID: 31254447 DOI: 10.1002/ccd.28384] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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: 01/01/2019] [Revised: 05/18/2019] [Accepted: 06/17/2019] [Indexed: 11/07/2022]
Abstract
OBJECTIVE To investigate the predictive value of SYNTAX (Synergy between Percutaneous Coronary Intervention with Taxus and Cardiac Surgery) score (SS) combined with reactive hyperemia index (RHI) in predicting 2-year major adverse cardiovascular events (MACE) in patients with acute coronary syndrome (ACS) undergoing percutaneous coronary intervention (PCI). BACKGROUND Both SS and RHI are good predictors of MACE; however, it is unknown whether combining SS and RHI could improve predictability of MACE in patients with ACS undergoing PCI. METHODS We undertook a prospective study in 401 ACS patients that underwent PCI. The RHI-SYNTAX score (RSS) was calculated by categorizing and summing up the RHI and SS of individual patients. Patients with RHI < 1.67 are given 1 point, RHI ≥ 1.67 given 0 points, and those with SS ≤ 22 scored as 0 and SS > 22 as 1 point. Patients were classified into three groups: low RSS (group 0), moderate RSS (group 1), and high RSS (group 2). RESULTS Among patients in the low, moderate, and high groups, the 2-year rates of MACE were 5.50, 10.66, and 23.33%, respectively (p < .0001). Total revascularization rates were 1.83, 2.54, and 8.89%, respectively (p = .015). Ischemic stroke rates were 0.00, 3.67, and 5.56%, respectively (p = .031). By multivariate analysis, the RSS was an independent predictor of 2-year MACE (hazard ratio: 2.09, 95% CI: 1.36-3.21, p = .001). Receiver-operator characteristic analysis indicated that the area under the curve significantly improved from 0.63 to 0.69, when RHI was added to SS (p < .0001). CONCLUSIONS RSS is correlated with 2-year MACE in patients presenting with ACS undergoing PCI.
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Affiliation(s)
- Yun He
- Department of Cardiology, Chongqing Kanghua Zhonglian Cardiovascular Hospital, Chongqing, China
| | - X F Cheng
- Department of Cardiology, Xinqiao Hospital, Institute of Cardiovascular Disease of People's Liberation Army, Army Medical University, Chongqing, China
| | - K Wang
- Department of Cardiology, Xinqiao Hospital, Institute of Cardiovascular Disease of People's Liberation Army, Army Medical University, Chongqing, China
| | - T Liu
- Department of Cardiology, Xinqiao Hospital, Institute of Cardiovascular Disease of People's Liberation Army, Army Medical University, Chongqing, China
| | - H P Fan
- Department of Internal Medicine, No. 546 General Hospital of People's Liberation Army, Xinjiang, China
| | - W X Pan
- Department of Cardiology, Xinqiao Hospital, Institute of Cardiovascular Disease of People's Liberation Army, Army Medical University, Chongqing, China
| | - P X He
- Department of Cardiology, Xinqiao Hospital, Institute of Cardiovascular Disease of People's Liberation Army, Army Medical University, Chongqing, China
| | - Jun Jin
- Department of Cardiology, Xinqiao Hospital, Institute of Cardiovascular Disease of People's Liberation Army, Army Medical University, Chongqing, China
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Wu AM, Zhang K, Li XL, Cheng XF, Zhou TJ, Du L, Chen C, Tian HJ, Sun XJ, Zhao CQ, Li YM, Zhao J. The compression of L5 nerve root, single or double sites?-radiographic graded signs, intra-operative detect technique and clinical outcomes. Quant Imaging Med Surg 2018; 8:383-390. [PMID: 29928603 DOI: 10.21037/qims.2018.05.08] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Background The L5 nerve root could be compressed at both L4-5 and L5-S1 regions. If L5 nerve root has confirmed compression at L4-5 level and questionable compression at L5-S1 foramina, performing both surgeries at L4-5 and L5-S1 levels may induce unnecessary extra surgery on L5-S1; however, ignoring foraminal stenosis of L5/S1 may require re-exploration. Methods Two hundred seventeen patients with L5 nerve root compressed at L4-5 lateral access were performed with L4-5 decompression and interbody fusion. Lee et al. grade classification was used to assess the foraminal stenosis of L5-S1 preoperatively. Nerve root probe was designed and used to detect if there were foraminal stenosis at L5-S1 level that compressing the exiting L5 nerve root. Visual analog scale (VAS) of low back pain, leg pain and Oswestry Disability Index (ODI) were used to assess clinical outcomes. Results For all of 217 patients who underwent L4-5 surgery, L5-S1 foramina were preoperatively assessed as: grade 0: 125 cases, grade 1: 58 cases, grade 2: 23 cases, and grade 3: 11 cases. After intra-operative L5 nerve root detection, 11/11 patients with grade 3 radiographic foraminal stenosis, 6/23 (26.1%) with grade 2 and 2/58 (3.4%) who had grade 1 underwent L4-5 and L5-S1 transforaminal lumbar interbody fusion (TLIF), the others received only L4-5 TLIF. Compared to pre-operative baseline data, both L4-5 TLIF and L4-5 and L5-S1 TLIF groups had significant decreased VAS of low back pain and leg pain, and ODI at 3 and 24 months after operation. Conclusions We suggested that our novel nerve root probe combined with pre-operative radiographic grade may be helpful to surgeons to identify the single or double compression of L5 nerve root and make a more precise surgical strategy to improve surgical outcome than the method depended on pre-operative radiographic grade alone.
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Affiliation(s)
- Ai-Min Wu
- Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Orthopaedic Implants, Shanghai 200011, China.,Department of Spine Surgery, Zhejiang Spine Surgery Centre, Orthopaedic Hospital, The Second Affiliated Hospital and Yuying Children's Hospital of the Wenzhou Medical University, The Second School of Medicine Wenzhou Medical University, The Key Orthopaedic Laboratory of Zhejiang Province, Wenzhou 325035, China
| | - Kai Zhang
- Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Orthopaedic Implants, Shanghai 200011, China
| | - Xun-Lin Li
- Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Orthopaedic Implants, Shanghai 200011, China
| | - Xiao-Fei Cheng
- Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Orthopaedic Implants, Shanghai 200011, China
| | - Tang-Jun Zhou
- Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Orthopaedic Implants, Shanghai 200011, China
| | - Lin Du
- Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Orthopaedic Implants, Shanghai 200011, China
| | - Chen Chen
- Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Orthopaedic Implants, Shanghai 200011, China
| | - Hai-Jun Tian
- Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Orthopaedic Implants, Shanghai 200011, China
| | - Xiao-Jiang Sun
- Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Orthopaedic Implants, Shanghai 200011, China
| | - Chang-Qing Zhao
- Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Orthopaedic Implants, Shanghai 200011, China
| | - Yan Michael Li
- Department of Neurosurgery, University of Rochester School of Medicine and Dentistry, Rochester, NY, USA
| | - Jie Zhao
- Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Orthopaedic Implants, Shanghai 200011, China
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Zhang F, Zhang K, Tian HJ, Wu AM, Cheng XF, Zhou TJ, Zhao J. Correlation between lumbar intervertebral disc height and lumbar spine sagittal alignment among asymptomatic Asian young adults. J Orthop Surg Res 2018; 13:34. [PMID: 29433530 PMCID: PMC5809838 DOI: 10.1186/s13018-018-0737-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Accepted: 01/30/2018] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND To investigate the distribution and characteristics of the lumbar intervertebral disc height (IDH) in asymptomatic Asian population and to determine whether the lumbar IDH is related to the lumbar spine sagittal alignment. METHODS A cohort of 169 cases of asymptomatic volunteers was enrolled from January 2014 to July 2016. All participants underwent magnetic resonance imaging of the lumbar spine and panoramic radiography of the spine. Panoramic radiographs of the spine were taken to evaluate pelvic incidence (PI), sacral slope (SS), and pelvic tilt (PT) using Surgimap® software. Roussouly classification was utilized to categorize all subjects according to the four subtypes of sagittal alignment. The IDH was measured on the MRI mid-saggital section of the vertebral body. The relationships between lumbar IDH and spine-pelvic parameters were also assessed using the Spearman correlation analysis. RESULTS The reference value ranges of IDH in asymptomatic Asian volunteers between L1/2, L2/3, L3/4, L4/5, and L5/S1 were (6.25, 10.99), (6.97, 12.08), (7.42, 13.3), (7.76, 14.57),and (7.11, 13.12) mm, respectively. Based on the above reference value, the high lumbar intervertebral space is defined as more than 14 mm. According to the Roussouly Classification, there are 33 cases in type I, 48 in type II, 66 in type III, and 22 in type IV. According to the definition of the high IDH, there are two cases in type I, three in type II, nine in type III, and eight in type IV. The results indicated that people in the Roussouly III and IV subtypes had greater values for IDH compared to those of Roussouly I and II subtypes, and the spinopelvic parameters were partly correlated with IDH in different subtypes. In addition, levels L4-L5 showed the highest IDH for all four groups followed by the L3-L4 and L5-S1 levels, and the value of L3-L4 is equivalent to that of L5-S1. All type groups showed moderate and positive correlations between the PI and IDH except the level of L1-L2 in type IV. CONCLUSIONS The IDH may influence the lumbar spine sagittal alignment in asymptomatic Asian adults. Moreover, pre-operative evaluation of IDH is useful for selection of optimal cage size and reconstruction of spinal alignment.
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Affiliation(s)
- Feng Zhang
- Ninth People's Hospital, Department of Orthopaedics, Shanghai Key Laboratory of Orthopaedic Implants, Shanghai Jiaotong University School of Medicine, 639 Zhizaoju Road, Shanghai, People's Republic of China
| | - Kai Zhang
- Ninth People's Hospital, Department of Orthopaedics, Shanghai Key Laboratory of Orthopaedic Implants, Shanghai Jiaotong University School of Medicine, 639 Zhizaoju Road, Shanghai, People's Republic of China
| | - Hai-Jun Tian
- Ninth People's Hospital, Department of Orthopaedics, Shanghai Key Laboratory of Orthopaedic Implants, Shanghai Jiaotong University School of Medicine, 639 Zhizaoju Road, Shanghai, People's Republic of China
| | - Ai-Min Wu
- Ninth People's Hospital, Department of Orthopaedics, Shanghai Key Laboratory of Orthopaedic Implants, Shanghai Jiaotong University School of Medicine, 639 Zhizaoju Road, Shanghai, People's Republic of China
| | - Xiao-Fei Cheng
- Ninth People's Hospital, Department of Orthopaedics, Shanghai Key Laboratory of Orthopaedic Implants, Shanghai Jiaotong University School of Medicine, 639 Zhizaoju Road, Shanghai, People's Republic of China
| | - Tang-Jun Zhou
- Ninth People's Hospital, Department of Orthopaedics, Shanghai Key Laboratory of Orthopaedic Implants, Shanghai Jiaotong University School of Medicine, 639 Zhizaoju Road, Shanghai, People's Republic of China
| | - Jie Zhao
- Ninth People's Hospital, Department of Orthopaedics, Shanghai Key Laboratory of Orthopaedic Implants, Shanghai Jiaotong University School of Medicine, 639 Zhizaoju Road, Shanghai, People's Republic of China.
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Cheng XF, Liu Q, Zhang XF, Zhao HD, Wang W, Chu AJ. Expression of mTOR and its inhibitory effect on cell proliferation and apoptosis of breast cancer cells. J BIOL REG HOMEOS AG 2015; 29:869-873. [PMID: 26753650] [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: 06/05/2023]
Abstract
The aim of this study is to investigate the expression of mTOR in breast cancer and observe the effect of CCI-779 on proliferation and apoptosis of MDA-MB-231 cells. Immunohistochemical staining was used to detect the expression of mTOR protein in breast cancer tissues and MDA-MB-231 cells. MTT assay was used to assess the effect of CCI-779 on proliferation of MDA-MB-231 cells. Annex-inV-FITC/ PI assay was utilized to evaluate the effect of CCI-779 on apoptosis of MDA-MB-231 cells. Among the 71 cases of breast cancer tissues, 54.9% were mTOR-positive that exhibited significantly higher expression than the 32 cases of normal tissues (21.9%); mTOR protein was also found to be expressed in MDA-MB-231 cells. The mTOR inhibitor CCI-779 significantly inhibited the proliferation of MDA-MB-231 cells that was dose- and time-dependent. However, CCI-779 was unable to induce apoptosis of MDA-MB-231 cells as demonstrated with AnnexinV-FITC/PI assay. mTOR plays a key role in the initiation and development of breast cancer, and its inhibitor CCI-779 exerts a strong suppressive activity against MDA-MB-231 cells, suggesting its therapeutic potential to treat breast cancer.
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Affiliation(s)
- X F Cheng
- Surgery Department of Galactophore, The First Affiliated Hospital of Henan University of TCM, Zhengzhou City, Henan Province, China
| | - Q Liu
- Scientific Bureau, Henan University of TCM, Zhengzhou City, China
| | - X F Zhang
- Department of Traditional Chinese Medicine and Western Medicine, Henan Cancer Hospital, Zhengzhou City, Henan Province, China
| | - H D Zhao
- Surgery Department of Galactophore, The First Affiliated Hospital of Henan University of TCM, Zhengzhou City, Henan Province, China
| | - W Wang
- Surgery Department of Galactophore, The First Affiliated Hospital of Henan University of TCM, Zhengzhou City, Henan Province, China
| | - A J Chu
- Surgery Department of Galactophore, The First Affiliated Hospital of Henan University of TCM, Zhengzhou City, Henan Province, China
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Cheng XF, Shi PJ, Hui C, Wang FS, Liu GH, Li BL. An optimal proportion of mixing broad-leaved forest for enhancing the effective productivity of moso bamboo. Ecol Evol 2015; 5:1576-84. [PMID: 25937902 PMCID: PMC4409407 DOI: 10.1002/ece3.1446] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2014] [Revised: 02/04/2015] [Accepted: 02/08/2015] [Indexed: 11/24/2022] Open
Abstract
Moso bamboos (Phyllostachys edulis) are important forestry plants in southern China, with substantial roles to play in regional economic and ecological systems. Mixing broad-leaved forests and moso bamboos is a common management practice in China, and it is fundamental to elucidate the interactions between broad-leaved trees and moso bamboos for ensuring the sustainable provision of ecosystem services. We examine how the proportion of broad-leaved forest in a mixed managed zone, topology, and soil profile affects the effective productivity of moso bamboos (i.e., those with significant economic value), using linear regression and generalized additive models. Bamboo's diameter at breast height follows a Weibull distribution. The importance of these variables to bamboo productivity is, respectively, slope (25.9%), the proportion of broad-leaved forest (24.8%), elevation (23.3%), gravel content by volume (16.6%), slope location (8.3%), and soil layer thickness (1.2%). Highest productivity is found on the 25° slope, with a 600-m elevation, and 30% broad-leaved forest. As such, broad-leaved forest in the upper slope can have a strong influence on the effective productivity of moso bamboo, ranking only after slope and before elevation. These factors can be considered in future management practice.
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Affiliation(s)
- Xiao-Fei Cheng
- Collaborative Innovation Center of Sustainable Forestry in Southern China of Jiangsu Province, Bamboo Research Institute, Nanjing Forestry University Nanjing, 210037, China
| | - Pei-Jian Shi
- Collaborative Innovation Center of Sustainable Forestry in Southern China of Jiangsu Province, Bamboo Research Institute, Nanjing Forestry University Nanjing, 210037, China
| | - Cang Hui
- Centre for Invasion Biology, Department of Mathematical Sciences, Stellenbosch University Matieland, 7602, South Africa ; Mathematical and Physical Biosciences, African Institute for Mathematical Sciences Cape Town, 7945, South Africa
| | - Fu-Sheng Wang
- Collaborative Innovation Center of Sustainable Forestry in Southern China of Jiangsu Province, Bamboo Research Institute, Nanjing Forestry University Nanjing, 210037, China
| | - Guo-Hua Liu
- Collaborative Innovation Center of Sustainable Forestry in Southern China of Jiangsu Province, Bamboo Research Institute, Nanjing Forestry University Nanjing, 210037, China
| | - Bai-Lian Li
- Ecological Complexity and Modeling Laboratory, Department of Botany and Plant Sciences, University of California Riverside, California, 92521-0124
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Leng WH, Cheng XF, Zhang JQ, Cao CN. Comment on "Photocatalytic oxidation of arsenite on TiO2: understanding the controversial oxidation mechanism involving superoxides and the effect of alternative electron acceptors". Environ Sci Technol 2007; 41:6311-6314. [PMID: 17937320 DOI: 10.1021/es070349n] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
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Cheng XF, Leng WH, Liu DP, Zhang JQ, Cao CN. Enhanced photoelectrocatalytic performance of Zn-doped WO(3) photocatalysts for nitrite ions degradation under visible light. Chemosphere 2007; 68:1976-84. [PMID: 17482660 DOI: 10.1016/j.chemosphere.2007.02.010] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2006] [Revised: 02/03/2007] [Accepted: 02/05/2007] [Indexed: 05/15/2023]
Abstract
WO(3) and Zn-doped WO(3) thin films were prepared on indium-tin oxide glass by a dip-coating. The composite films were characterized by UV-Vis absorption spectra, X-ray diffraction and scanning electron microscope. The effect of preparation conditions (concentration of Zn, annealing temperature, number of layers) on the photocurrent was studied. It was found that the photocurrent under visible light displayed the highest value for 2% Zn-WO(3) films annealed at 400 degrees C. The photocatalytic activity of the Zn-doped WO(3) was evaluated in terms of decay rate of nitrite ions under visible light. The influence of applied potential, initial pH and nitrite concentration on the reaction rate was studied. The experiments demonstrated that NO(2)(-) could be efficiently degraded on the doped photoanode that showed a higher activity than the undoped WO(3) especially under high anodic potential (>0.7 V). The rate of degradation was enhanced in aqueous NaCl solutions. Furthermore, it was demonstrated that the photodegradation mechanism of NO(2)(-) proceeded mainly indirectly via OH radicals. The possible reason of enhancement of reaction rate was also discussed.
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Affiliation(s)
- X F Cheng
- Department of Chemistry, Yuquan Campus, Zhejiang University, Hangzhou 310027, China
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Xu Z, Wen YJ, Zhong WD, Chae CJ, Cheng XF, Wang Y, Lu C, Shankar J. High-speed WDM-PON using CW injection-locked Fabry-Pérot laser diodes. Opt Express 2007; 15:2953-2962. [PMID: 19532532 DOI: 10.1364/oe.15.002953] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We propose a new WDM-PON architecture using Fabry-Pérot laser diodes (FP-LDs) that are injection-locked by continuous wave (CW) seed light. The modulation characteristics of the CW light injection-locked FP-LD are first investigated. Both uplink and downlink transmissions at 10 Gb/s are experimentally demonstrated using the proposed CW injection-locked FP-LDs. It is shown that up to 16 laser cavity modes can be selectively injection-locked with side mode suppression ratio larger than 30dB. The effects of the location of FP-LD cavity modes, transmission distance, and injection wavelength detuning on the overall transmission performance are investigated. The possibility of eliminating polarization dependence of the proposed CW injection scheme is also experimentally demonstrated by properly configuring a depolarizer. The deployment cost for the proposed WDM PON is potentially low from the fact that the CW laser sources located at the central office can be shared by many WDM-PONs and low-cost FP-LDs are used as light sources for data rates as high as 10 Gb/s.
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Abstract
CONSTANS (CO) is an important floral regulator in the photoperiod pathway, integrating the circadian clock and light signal into a control for flowering time. It is known that CO promotes flowering in Arabidopsis under long-day conditions. CONSTANS-LIKE 9 (COL9) is a member of the CONSTANS-LIKE gene family, encoding a nuclear protein. The expression of COL9 is regulated by the circadian clock in the photoperiod pathway and is detected in various organs. Unexpectedly, overexpression of COL9 in transgenic Arabidopsis resulted in delayed flowering, while co-suppression lines and a transferred DNA (T-DNA) knockout line showed earlier flowering under long-day conditions. Overexpression of COL9 did not enhance the late-flowering phenotype in a co mutant background. Double overexpressors produced by overexpression of CO in COL9 transgenic lines showed an early flowering phenotype similar to single CO overexpressors. The pattern of oscillation of a number of circadian-associated genes remained unchanged in the COL9 transgenic lines. Compared with wild-type plants, the abundance of CO and FLOWERING LOCUS T (FT) mRNA was reduced in the COL9 overexpression lines. Our results indicate that COL9 is involved in regulation of flowering time by repressing the expression of CO, concomitantly reducing the expression of FT and delaying floral transition.
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Affiliation(s)
- Xiao-Fei Cheng
- Forage Improvement Division, The Samuel Roberts Noble Foundation, 2510 Sam Noble Parkway, Ardmore, OK 73401, USA
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21
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Li L, Cheng XF, Leshkevich J, Umezawa T, Harding SA, Chiang VL. The last step of syringyl monolignol biosynthesis in angiosperms is regulated by a novel gene encoding sinapyl alcohol dehydrogenase. Plant Cell 2001; 13:1567-86. [PMID: 11449052 PMCID: PMC139549 DOI: 10.1105/tpc.010111] [Citation(s) in RCA: 98] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2001] [Accepted: 05/12/2001] [Indexed: 05/18/2023]
Abstract
Cinnamyl alcohol dehydrogenase (CAD; EC 1.1.1.195) has been thought to mediate the reduction of both coniferaldehyde and sinapaldehyde into guaiacyl and syringyl monolignols in angiosperms. Here, we report the isolation of a novel aspen gene (PtSAD) encoding sinapyl alcohol dehydrogenase (SAD), which is phylogenetically distinct from aspen CAD (PtCAD). Liquid chromatography-mass spectrometry-based enzyme functional analysis and substrate level-controlled enzyme kinetics consistently demonstrated that PtSAD is sinapaldehyde specific and that PtCAD is coniferaldehyde specific. The enzymatic efficiency of PtSAD for sinapaldehyde was approximately 60 times greater than that of PtCAD. These data suggest that in addition to CAD, discrete SAD function is essential to the biosynthesis of syringyl monolignol in angiosperms. In aspen stem primary tissues, PtCAD was immunolocalized exclusively to xylem elements in which only guaiacyl lignin was deposited, whereas PtSAD was abundant in syringyl lignin-enriched phloem fiber cells. In the developing secondary stem xylem, PtCAD was most conspicuous in guaiacyl lignin-enriched vessels, but PtSAD was nearly absent from these elements and was conspicuous in fiber cells. In the context of additional protein immunolocalization and lignin histochemistry, these results suggest that the distinct CAD and SAD functions are linked spatiotemporally to the differential biosynthesis of guaiacyl and syringyl lignins in different cell types. SAD is required for the biosynthesis of syringyl lignin in angiosperms.
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Affiliation(s)
- L Li
- Plant Biotechnology Research Center, School of Forestry, Michigan Technological University, Houghton, MI 49931, USA
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Li L, Cheng XF, Leshkevich J, Umezawa T, Harding SA, Chiang VL. The last step of syringyl monolignol biosynthesis in angiosperms is regulated by a novel gene encoding sinapyl alcohol dehydrogenase. Plant Cell 2001; 13:1567-1586. [PMID: 11449052 DOI: 10.1105/tpc.13.7.1567] [Citation(s) in RCA: 69] [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: 05/21/2023]
Abstract
Cinnamyl alcohol dehydrogenase (CAD; EC 1.1.1.195) has been thought to mediate the reduction of both coniferaldehyde and sinapaldehyde into guaiacyl and syringyl monolignols in angiosperms. Here, we report the isolation of a novel aspen gene (PtSAD) encoding sinapyl alcohol dehydrogenase (SAD), which is phylogenetically distinct from aspen CAD (PtCAD). Liquid chromatography-mass spectrometry-based enzyme functional analysis and substrate level-controlled enzyme kinetics consistently demonstrated that PtSAD is sinapaldehyde specific and that PtCAD is coniferaldehyde specific. The enzymatic efficiency of PtSAD for sinapaldehyde was approximately 60 times greater than that of PtCAD. These data suggest that in addition to CAD, discrete SAD function is essential to the biosynthesis of syringyl monolignol in angiosperms. In aspen stem primary tissues, PtCAD was immunolocalized exclusively to xylem elements in which only guaiacyl lignin was deposited, whereas PtSAD was abundant in syringyl lignin-enriched phloem fiber cells. In the developing secondary stem xylem, PtCAD was most conspicuous in guaiacyl lignin-enriched vessels, but PtSAD was nearly absent from these elements and was conspicuous in fiber cells. In the context of additional protein immunolocalization and lignin histochemistry, these results suggest that the distinct CAD and SAD functions are linked spatiotemporally to the differential biosynthesis of guaiacyl and syringyl lignins in different cell types. SAD is required for the biosynthesis of syringyl lignin in angiosperms.
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Affiliation(s)
- L Li
- Plant Biotechnology Research Center, School of Forestry, Michigan Technological University, Houghton, MI 49931, USA
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23
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Abstract
From the leaves of Mallotus apelta, seven benzopyran compounds were obtained and their structures were determined using spectroscopic methods. One showed moderate antibiotic activity against Micrococcus lutens.
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Affiliation(s)
- T Y An
- National Center for Drug Screening, Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, People's Republic of China
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24
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Abstract
Three coumarino-lignoids, aquillochin (1), cleomiscosin A and 5'-demethylaquillochin have been isolated from Mallotus apelta. The structure of the new compound 3 was determined by spectroscopic techniques.
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Affiliation(s)
- X F Cheng
- Department of Natural Products Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 200031, Shanghai, PR China
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25
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Song W, Guan HJ, Zhu XZ, Chen ZL, Yin ML, Cheng XF. Protective effect of bilobalide against nitric oxide-induced neurotoxicity in PC12 cells. Acta Pharmacol Sin 2000; 21:415-20. [PMID: 11324438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
Abstract
AIM To examine the effects of bilobalide on nitric oxide-induced neurotoxicity in pheochromocytoma-derived PC12 cells (PC12 cells). METHODS PC12 cell survival was monitored by LDH release and 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide (MTT) assays. Superoxide dismutases (SOD) and catalase (CAT) activities were measured based on their abilities to inhibit the oxidation of epinephrine by the xanthine-xanthine oxidase system or to decompose H2O2 respectively. The content of malondialdehyde (MDA) was measured by a fluorometric assay to indicate the lipid peroxidation. RESULTS 3-Morpholinosydnonimine (SIN-1, 50-300 mumol.L-1) induced PC12 cell damage. After the cells had been pretreated with 10 mumol.L-1 bilobalide for 24 h, the cell viability was increased to 91% +/- 30% from 52% +/- 14% in SIN-1 alone group. Moreover, the activities of SOD and CAT were increased after cells were treated with bilobalide. CONCLUSION The NO-induced neurotoxicity can be protected by bilobalide in PC12 cells. The bilobalide-induced increase in SOD and CAT activities may serve as one of the mechanisms underlying the neuroprotective effect of bilobalide.
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Affiliation(s)
- W Song
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 200031, China
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26
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Zhou LJ, Song W, Zhu XZ, Chen ZL, Yin ML, Cheng XF. Protective effects of bilobalide on amyloid beta-peptide 25-35-induced PC12 cell cytotoxicity. Acta Pharmacol Sin 2000; 21:75-9. [PMID: 11263252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
Abstract
AIM To study the effect of bilobalide, a terpene extracted from the leaves of Ginkgo biloba, on beta-amyloid peptide fragment 25-35 (A beta 25-35)-induced PC12 cell cytotoxicity. METHODS 3-[4,5-Dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide and lactate dehydrogenase assay were used to measure the viability of PC12 cells. Thiobarbituric acid-reactive substances were measured to determine lipid peroxidation of cells. Antioxidant enzymes in PC12 cells were detected. RESULTS Treatment of PC12 cells with A beta 25-35 (100 mumol.L-1) for 24 h caused a great decrease in cell viability (P < 0.01 compared with control). Bilobalide 25-100 mumol.L-1 dose-dependently attenuated the cytotoxic effect of A beta 25-35. Bilobalide also inhibited A beta 25-35 (100 mumol.L-1)-induced elevation of lipid peroxidation and decline of antioxidant enzyme activities. CONCLUSION Bilobalide protected PC12 cells from A beta 25-35-induced cytotoxicity.
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Affiliation(s)
- L J Zhou
- Department of Pharmacology I, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 200031, China
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27
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Abstract
Three new diterpenoids, 10-hydroxy-cembrene-5-one, 6-hydroxy-cembrene-5,10-dione and 2alpha,4beta,15,16-tetrahydroxyl-dolabradane were isolated from the petroleum ether fraction of the alcoholic extract of Mallotus apelta Muell.Arg. Their structures were determined by spectral methods.
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Affiliation(s)
- X F Cheng
- Department of Natural Products Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences
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28
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Abstract
Two new diterpenoids, malloapeltene (6,8-dihydroxy-cembrene-5-one) and malloapeltin (4alpha,15,16-trihydroxy-dolabradane) were isolated and characterized from the petroleum ether fraction of the alcoholic extract of Mallotus apelta Muell.Arg. Their structures were determined by spectral methods.
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Affiliation(s)
- X F Cheng
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences
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29
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Stefansson S, Muhammad S, Cheng XF, Battey FD, Strickland DK, Lawrence DA. Plasminogen activator inhibitor-1 contains a cryptic high affinity binding site for the low density lipoprotein receptor-related protein. J Biol Chem 1998; 273:6358-66. [PMID: 9497365 DOI: 10.1074/jbc.273.11.6358] [Citation(s) in RCA: 102] [Impact Index Per Article: 3.9] [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: 11/06/2022] Open
Abstract
Much of the controversy surrounding the binding of plasminogen activator inhibitor-1 (PAI-1) to the low density lipoprotein receptor-related protein (LRP) may be due to the labile structure of PAI-1 and the distinct conformations that it can adopt. To examine this possibility and to test the hypothesis that PAI-1 contains a specific high affinity binding site for LRP, a sensitive and quantitative assay for PAI-1 binding to LRP was developed. This assay utilizes a unique PAI-1 mutant that was constructed with a hexapeptide tag at the NH2 terminus, which is recognized by the protein kinase, heart muscle kinase and can be specifically labeled with 32P. Our results show that only 32P-PAI-1 in complex with a proteinase binds LRP with high affinity and is efficiently endocytosed by cells, indicating that a high affinity site for LRP is generated on PAI-1 only when in complex with a proteinase. In addition, PAI-1 in complex with different proteinases is shown to cross-compete for LRP binding, demonstrating that the binding site is independent of the proteinase and therefore must reside on the PAI-1 portion of the complex. Finally, mutagenesis of PAI-1 results in loss of LRP binding, confirming that the high affinity binding site is located on PAI-1 and suggesting that the LRP binding site lays within a region of PAI-1 previously shown to contain the heparin binding domain.
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Affiliation(s)
- S Stefansson
- Departments of Biochemistry, J. H. Holland Laboratory, American Red Cross, Rockville, Maryland 20855, USA
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30
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Parameswaran KN, Cheng XF, Chen EC, Velasco PT, Wilson JH, Lorand L. Hydrolysis of gamma:epsilon isopeptides by cytosolic transglutaminases and by coagulation factor XIIIa. J Biol Chem 1997; 272:10311-7. [PMID: 9092583 DOI: 10.1074/jbc.272.15.10311] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.4] [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: 02/04/2023] Open
Abstract
Nepsilon-(gamma-glutamyl)lysine cross-links, connecting various peptide chain segments, are frequently the major products in transglutaminase-catalyzed reactions. We have now investigated the effectiveness of these enzymes for hydrolyzing the gamma:epsilon linkage. Branched compounds were synthesized, in which the backbone on the gamma-side of the cross-bridge was labeled with a fluorophor (5-(dimethylamino)-1-naphthalenesulfonyl or 2-aminobenzoyl) attached through an epsilon-aminocaproyl linker in the N-terminal position, and the other branch of the bridge was constructed with Lys methylamide or diaminopentane blocked by 2,4-dinitrophenyl at the Nalpha position. Hydrolysis of the cross-link could be followed in these internally quenched substrates by an increase in fluorescence. In addition to the thrombin and Ca2+-activated human coagulation Factor XIIIa, cytosolic transglutaminases from human red cells and from guinea pig liver were tested. All three enzymes were found to display good isopeptidase activities, with Km values of 10(-4) to 10(-5) M. Inhibitors of transamidation were effective in blocking the hydrolysis by the enzymes, indicating that expression of isopeptidase activity did not require unusual protein conformations. We suggest that transglutaminases may play a dynamic role in biology not only by promoting the formation but also the breaking of Nepsilon-(gamma-glutamyl)lysine isopeptides.
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Affiliation(s)
- K N Parameswaran
- Department of Cell and Molecular Biology and the Feinberg Cardiovascular Research Institute, Northwestern University Medical School, Chicago, Illinois 60611, USA
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31
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Cheng XF, Brohlin M, Pohl G, Bäck O, Wallén P. Binding of tissue plasminogen activator to endothelial cells. The effect on functional properties. Localization of a ligand in the B-chain of tPA. Thromb Res 1995; 77:149-64. [PMID: 7740507 DOI: 10.1016/0049-3848(95)91621-q] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [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: 01/26/2023]
Abstract
The binding of 125I-labelled tissue plasminogen activator (tPA), the tPA A- or B-chain to endothelial cells (EC) were studied in suspensions of cultured human umbilical vein EC (HUVEC) or immortalized microvascular EC (HMEC). By determinations of the concentration-dependent binding it was shown that both the A-chain and the B-chain, which were isolated after partial reduction of two-chain tPA, contain ligands for binding to EC. The affinity for the B-chain was much higher than for the A-chain according to Scatchard analysis (Kd 24 and 515 nM, respectively), whereas the number of binding sites was higher for the A-chain than for the B-chain (Bmax 8 x 10(5) and 1.2 x 10(5), respectively). There were no cross interactions between the A- and B-chains and their binding sites. The binding of tPA to EC induced an almost 100-fold increase of the activation rate when compared to the same amount of enzyme in free solution, which in contrast to the fibrin-induced stimulation was not inhibited by antibodies against fibrin. The enzymatic activity of the B-chain was much less affected by the association to the cells. Both tPA and the tPA B-chain were largely protected against inhibition by an excess plasminogen activator type-1 (PAI-1) when bound to EC, whereas the same amount of free tPA was totally inactivated. The competition studies strongly indicated that an N-terminal segment in the B-chain, AKHRRSPGER, may be the ligand part of the B-chain. It is interesting to note that this polypeptide segment also participates in a binding site for PAI-1, necessary for effective inhibition. This implies a possible competition between PAI-1 and a tPA-receptor for binding of tPA. High molecular weight urokinase had no quenching effect on the binding of the B-chain to EC.
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Affiliation(s)
- X F Cheng
- Department of Medical Biochemistry and Biophysics, Umeå University, Sweden
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32
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Pan TC, Yang MS, Cao XB, Ge YX, Zhang BG, Zhao JP, Cheng XF. Clinical measurement of antibodies against acetylcholine receptor (AchR), SOD and LPO in patients with myasthenia gravis (MG) before and after thymectomy. J Tongji Med Univ 1994; 14:249-51. [PMID: 7760440 DOI: 10.1007/bf02897680] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The antibodies against acetylcholine receptor AchR and levels of SOD and LPO were measured in 11 patients with myasthenia gravis (MG), and the results were compared with normal controls and patients with diseases other than MG. The results showed that the antibodies against AchR were higher as compared with other groups before and after operation. The post-operative level of antibodies was obviously lower than the pre-operative value. An slight increase in SOD and significant decrease in mean value of LPO after surgery were noted. The possible mechanism was discussed.
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Affiliation(s)
- T C Pan
- Department of Thorax, Tongji Hospital, Tongji Medical University, Wuhan
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33
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Affiliation(s)
- X M Wang
- Dermatoses Control and Research Department, Shanghai Institute of Dermatology, PR China
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34
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Cheng XF, Bäck O, Nilsson TK, Nylander Lundqvist E, Pohl G, Wallén P. Binding of tissue plasminogen activator to human endothelial cells. Importance of the B-chain as a ligand. Biochem J 1992; 287 ( Pt 2):407-13. [PMID: 1332673 PMCID: PMC1133180 DOI: 10.1042/bj2870407] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The aim of the present study was to investigate the binding of tissue plasminogen activator (tPA) to cultured endothelial cells and to characterize binding structures present in the cultures. Studies on the binding of 125I-tPA to cultured endothelial cells from human umbilical-cord veins (HUVEC) indicated that the number of sites for specific binding of tPA is 8 x 10(5) per cell. Treatment with an excess of antibodies against plasminogen-activator inhibitor type 1 (PAI-1) caused an 80% decrease in the binding, leaving about 1.6 x 10(5) unoccupied binding sites per cell, which appeared to be different from PAI-1. About 1.9 x 10(5) binding sites/cell for tPA were found on the surface of HUVEC that had been detached from the matrix. This indicates that only minor amounts of PAI-1 occur on the surface of the cells. In addition, immunocytochemical analysis showed that PAI-1 antigen is present almost exclusively in the cytoplasm but was not observed on the surface of the cells, whereas tPA antigen is abundant on the plasma membrane of tPA-treated cells as well as intracellularly. Competition studies using unlabelled compounds showed that native tPA and tPA B-chain (the proteinase domain), as well as the inactive derivatives, B-chain inactivated with D-Phe-Pro-Arg-chloromethane and tPA-PAI-1 complex, caused a considerable quenching of the binding of 125I-tPA to HUVEC, whereas the isolated A-chain had no demonstrable effect. Two components (apparent molecular masses 38 kDa and 56 kDa) reacting with tPA but lacking PAI-1 antigen determinants were identified. Thus the data suggest that tPA binds to HUVEC by two principally different mechanisms. One is mediated by PAI-1, which binds and inactivates tPA with a functional active site. The other binding is achieved by components which react with sites on the activator molecule other than structures of the A-chain or the active site.
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Affiliation(s)
- X F Cheng
- Department of Medical Biochemistry and Biophysics, Umeå University, Sweden
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35
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Cheng XF. [Sensitivity of human squamous and adenoid cystic carcinoma cell lines with cisplatin and it's combined chemotherapy in vitro]. Zhonghua Kou Qiang Yi Xue Za Zhi 1991; 26:270-2, 316. [PMID: 1726143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
This was a report on the sensitivity of human squamous (Tca-8113) and adenoid cystic carcinoma (Acc-2) cell lines with Cisplatin (DDP) and it's combined chemotherapy (DDP+VCR+PYM, or PVP). DDP could kill both these two cell lines in vitro depending on the concentration of agent in given time. The rate of 3H-TdR incorporation, plating efficiency and DNA synthesis of carcinoma cells were prevented in drug-exposing groups. Tca-8113 cell line was more sensitive to DDP than Acc-2 cell line (P less than 0.01). PVP combined chemotherapy could enhance DDP's anticancer efficiency.
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Affiliation(s)
- X F Cheng
- School of Stomatology, Shanghai Second Medical University
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36
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Cheng XF. [Intermittent exophthalmos]. Zhonghua Yan Ke Za Zhi 1991; 27:292-4. [PMID: 1815924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Intraorbital angiograms revealed venous lakes and phleboliths in 14 cases of intermittent exophthalmos. The pathological features were similar to those of venous varix, with frequent irregular vascular sclerosis, hyperplasia of connective tissue, and secondary hemorrhages encapsulated by granulation. The occurrence of enophthalmos following exophthalmos was due to atrophy of intraocular adipose tissue through compression by the venous varix. Among the series, 4 cases were treated successfully with surgery and 2 cases with injections of sclerosing agent, the latter being especially simple and useful for cases of indication.
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Affiliation(s)
- X F Cheng
- Department of Ophthalmology, Beijing Xuan Wu Hospital
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37
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Abstract
Positive and negative symptoms at admission and discharge of 401 unselected schizophrenic patients from four psychiatric hospitals around China were studied. On admission 58% of patients had prominent negative symptoms and the overall severity of negative symptoms was similar to that of positive symptoms; at discharge, negative symptoms were more prevalent and more severe. The severity of negative symptoms was not significantly correlated with duration of illness or with dosage of medication; 48% of first-episode, drug-naive patients had prominent negative symptoms on admission. Negative symptoms responded to standard neuroleptic treatment, but the improvement was less marked than that in positive symptoms (47% v. 80%). The proportion of patients classified as positive type, negative type, and mixed type schizophrenia altered dramatically with treatment. These findings highlight the importance of negative symptoms in the assessment and treatment of both acute and chronic schizophrenia.
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Affiliation(s)
- M R Phillips
- Research Centre of Psychological Medicine, Shashi Psychiatric Hospital, Hubei, People's Republic of China
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38
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Xu WM, Cheng XF, Hong LS, Liu LZ, Bao Y, He RG, Zhou XJ, Shen ZZ, Qui WQ, Ponder B. The gene for von Recklinghausen neurofibromatosis (NF1) maps to the pericentromeric region of chromosome 17 in Chinese families. Genomics 1991; 10:1090-2. [PMID: 1916815 DOI: 10.1016/0888-7543(91)90206-t] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Linkage analysis of six Chinese families with neurofibromatosis type 1 (NF1) confirms the location of the NF1 gene to the region of the proximal long arm of chromosome 17, as in Caucasian populations. The diagnosis of NF1 was made according to internationally accepted criteria. The markers used were D17S71, D17S58, D17S33, and EVI2A. The overall odds in favor of NF1 lying within this linkage group in the families studied are over 150,000:1, with a maximum location score of 5.112 for the interval D17S58-EVI2A.
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Affiliation(s)
- W M Xu
- Shanghai Institute of Cell Biology, China
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39
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Wallén P, Cheng XF, Ohlsson PI. Effects of structural modifications on the properties of tissue plasminogen activator (tPA). Adv Exp Med Biol 1990; 281:185-94. [PMID: 2129368 DOI: 10.1007/978-1-4615-3806-6_18] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- P Wallén
- Department of Medical Biochemistry and Biophysics, University of Umeå, Sweden
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40
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Yang ZL, Wang YZ, Wu CL, Huang YD, Wang QC, Cheng XF, Chen HT. [Toxicity experiment on Sargassum, radix Knoxiae, radix Ransul and flos Genkwa against radix Glycyrrhizae in the antagonism of 18 Chinese drugs]. Zhongguo Zhong Yao Za Zhi 1989; 14:48-50, 64. [PMID: 2506898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
In order to further look into the cause of the antagonisms in the 18 Chinese medicinal herbs, stimulation and toxicity experiments, with five Chinese medicinal herbs (Sargassum Radix Knoxiae, Radix Kansul and Flos Genkwa against Radix Glycyrrhiza) as a group, were done in healthy rats and rabbits.
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41
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Liu J, Xia L, Cheng XF. [Anti-inflammatory effects of fulvotomentosasides]. Zhongguo Yao Li Xue Bao 1988; 9:395-7. [PMID: 3218531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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42
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Cheng XF, Shao HZ, Chen ZP. [Effect of megestrol acetate compound (injectable contraceptive) on human blood coagulation, anticoagulation activity, fibrinolysis and platelet aggregation]. Shengzhi Yu Biyun 1988; 8:22-6. [PMID: 12315407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
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43
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Cheng XF. [Clinico-pathological analysis of optic nerve gliomas]. Zhonghua Yan Ke Za Zhi 1986; 22:282-5. [PMID: 3098527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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44
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Cheng XF. [Analysis of misdiagnosed mucoceles of the nasal sinuses]. Zhonghua Yan Ke Za Zhi 1986; 22:211-2. [PMID: 3096667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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