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Liu Y, Xiong W, Li J, Feng H, Jing S, Liu Y, Zhou H, Li D, Fu D, Xu C, He Y, Ye Q. Application of dental pulp stem cells for bone regeneration. Front Med (Lausanne) 2024; 11:1339573. [PMID: 38487022 PMCID: PMC10938947 DOI: 10.3389/fmed.2024.1339573] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 01/15/2024] [Indexed: 03/17/2024] Open
Abstract
Bone defects resulting from severe trauma, tumors, inflammation, and other factors are increasingly prevalent. Stem cell-based therapies have emerged as a promising alternative. Dental pulp stem cells (DPSCs), sourced from dental pulp, have garnered significant attention owing to their ready accessibility and minimal collection-associated risks. Ongoing investigations into DPSCs have revealed their potential to undergo osteogenic differentiation and their capacity to secrete a diverse array of ontogenetic components, such as extracellular vesicles and cell lysates. This comprehensive review article aims to provide an in-depth analysis of DPSCs and their secretory components, emphasizing extraction techniques and utilization while elucidating the intricate mechanisms governing bone regeneration. Furthermore, we explore the merits and demerits of cell and cell-free therapeutic modalities, as well as discuss the potential prospects, opportunities, and inherent challenges associated with DPSC therapy and cell-free therapies in the context of bone regeneration.
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Affiliation(s)
- Ye Liu
- Center of Regenerative Medicine, Department of Stomatology Renmin Hospital of Wuhan University, Wuhan, China
| | - Wei Xiong
- Center of Regenerative Medicine, Department of Stomatology Renmin Hospital of Wuhan University, Wuhan, China
| | - Junyi Li
- Center of Regenerative Medicine, Department of Stomatology Renmin Hospital of Wuhan University, Wuhan, China
| | - Huixian Feng
- Center of Regenerative Medicine, Department of Stomatology Renmin Hospital of Wuhan University, Wuhan, China
| | - Shuili Jing
- Center of Regenerative Medicine, Department of Stomatology Renmin Hospital of Wuhan University, Wuhan, China
| | - Yonghao Liu
- Center of Regenerative Medicine, Department of Stomatology Renmin Hospital of Wuhan University, Wuhan, China
| | - Heng Zhou
- Center of Regenerative Medicine, Department of Stomatology Renmin Hospital of Wuhan University, Wuhan, China
| | - Duan Li
- Center of Regenerative Medicine, Department of Stomatology Renmin Hospital of Wuhan University, Wuhan, China
| | - Dehao Fu
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chun Xu
- Sydney Dental School, Faculty of Medicine and Health, University of Sydney, Sydney, NSW, Australia
| | - Yan He
- Institute of Regenerative and Translational Medicine, Tianyou Hospital of Wuhan University of Science and Technology, Wuhan, China
- Department of Oral and Maxillofacial Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| | - Qingsong Ye
- Center of Regenerative Medicine, Department of Stomatology Renmin Hospital of Wuhan University, Wuhan, China
- Department of Oral and Maxillofacial Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
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Jing S, Dai Z, Wu Y, Liu X, Ren T, Liu X, Zhang L, Fu J, Chen X, Xiao W, Wang H, Huang Y, Qu Y, Wang W, Gu X, Ma L, Zhang S, Yu Y, Li L, Han Z, Su X, Qiao Y, Wang C. Prevalence and influencing factors of depressive and anxiety symptoms among hospital-based healthcare workers during the surge period of the COVID-19 pandemic in the Chinese mainland: a multicenter cross-sectional study. QJM 2023; 116:911-922. [PMID: 37561096 DOI: 10.1093/qjmed/hcad188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 07/06/2023] [Indexed: 08/11/2023] Open
Abstract
BACKGROUND From November 2022 to February 2023, the Chinese mainland experienced a surge in COVID-19 infection and hospitalization, and the hospital-based healthcare workers (HCWs) might suffer serious psychological crisis during this period. This study aims to assess the depressive and anxiety symptoms among HCWs during the surge of COVID-19 pandemic and to provide possible reference on protecting mental health of HCWs in future infectious disease outbreaks. METHODS A multicenter cross-sectional study was carried out among hospital-based HCWs in the Chinese mainland from 5 January to 9 February 2023. The PHQ-9 (nine-item Patient Health Questionnaire) and GAD-7 (seven-item Generalized Anxiety Disorder Questionnaire) were used to measure depressive and anxiety symptoms. Ordinal logistic regression analysis was performed to identify influencing factors. RESULTS A total of 6522 hospital-based HCWs in the Chinse mainland were included in this survey. The prevalence of depressive symptoms among the HCWs was 70.75%, and anxiety symptoms was 47.87%. The HCWs who perceived higher risk of COVID-19 infection and those who had higher work intensity were more likely to experience depressive and anxiety symptoms. Additionally, higher levels of mindfulness, resilience and perceived social support were negatively associated with depressive and anxiety symptoms. CONCLUSION This study revealed that a high proportion of HCWs in the Chinese mainland suffered from mental health disturbances during the surge of the COVID-19 pandemic. Resilience, mindfulness and perceived social support are important protective factors of HCWs' mental health. Tailored interventions, such as mindfulness practice, should be implemented to alleviate psychological symptoms of HCWs during the COVID-19 pandemic or other similar events in the future.
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Affiliation(s)
- S Jing
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Z Dai
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Y Wu
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - X Liu
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - T Ren
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - X Liu
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - L Zhang
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - J Fu
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - X Chen
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - W Xiao
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - H Wang
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Y Huang
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Y Qu
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - W Wang
- School of Nursing, Jining Medical University, Jining, Shandong, China
| | - X Gu
- Affiliated Tumor Hospital, Xinjiang Medical University, Urumqi, China
| | - L Ma
- Public Health School, Dalian Medical University, Dalian, China
| | - S Zhang
- Henan Cancer Hospital, Affiliate Cancer Hospital of Zhengzhou University, Zhengzhou, China
| | - Y Yu
- The First Affiliated Hospital of Baotou Medical College, Baotou, Inner Mongolia Autonomous Region, China
| | - L Li
- Department of Clinical Research, The First Affiliated Hospital of Jinan University, Guangdong, China
| | - Z Han
- China Foreign Affairs University, Beijing, China
| | - X Su
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Y Qiao
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
- Department of Epidemiology, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - C Wang
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
- Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
- National Clinical Research Center for Respiratory Diseases, Beijing, China
- Chinese Academy of Engineering, Beijing, China
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Zhou H, Jing S, Xiong W, Zhu Y, Duan X, Li R, Peng Y, Kumeria T, He Y, Ye Q. Correction: Metal-organic framework materials promote neural differentiation of dental pulp stem cells in spinal cord injury. J Nanobiotechnology 2023; 21:386. [PMID: 37875857 PMCID: PMC10594674 DOI: 10.1186/s12951-023-02141-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2023] Open
Affiliation(s)
- Heng Zhou
- Center of Regenerative Medicine, Department of Stomatology, Renmin Hospital of Wuhan University, 430060, Wuhan, China
| | - Shuili Jing
- Center of Regenerative Medicine, Department of Stomatology, Renmin Hospital of Wuhan University, 430060, Wuhan, China
| | - Wei Xiong
- Center of Regenerative Medicine, Department of Stomatology, Renmin Hospital of Wuhan University, 430060, Wuhan, China
| | - Yangzhi Zhu
- Terasaki Institute for Biomedical Innovation, 90095, Los Angeles, CA, USA
| | - Xingxiang Duan
- Center of Regenerative Medicine, Department of Stomatology, Renmin Hospital of Wuhan University, 430060, Wuhan, China
| | - Ruohan Li
- Center of Regenerative Medicine, Department of Stomatology, Renmin Hospital of Wuhan University, 430060, Wuhan, China
| | - Youjian Peng
- Center of Regenerative Medicine, Department of Stomatology, Renmin Hospital of Wuhan University, 430060, Wuhan, China
| | - Tushar Kumeria
- School of Materials Science and Engineering, University of New South Wales, Sydney, NSW, Australia
| | - Yan He
- Center of Regenerative Medicine, Department of Stomatology, Renmin Hospital of Wuhan University, 430060, Wuhan, China.
- Institute of Regenerative and Translational Medicine, Tianyou Hospital of Wuhan University of Science and Technology, 430064, Wuhan, Hubei, China.
- Department of Oral and Maxillofacial Surgery, Massachusetts General Hospital, Harvard Medical School, 02114, Boston, MA, USA.
| | - Qingsong Ye
- Center of Regenerative Medicine, Department of Stomatology, Renmin Hospital of Wuhan University, 430060, Wuhan, China.
- Department of Oral and Maxillofacial Surgery, Massachusetts General Hospital, Harvard Medical School, 02114, Boston, MA, USA.
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Zhou H, Jing S, Xiong W, Zhu Y, Duan X, Li R, Peng Y, Kumeria T, He Y, Ye Q. Metal-organic framework materials promote neural differentiation of dental pulp stem cells in spinal cord injury. J Nanobiotechnology 2023; 21:316. [PMID: 37667307 PMCID: PMC10478386 DOI: 10.1186/s12951-023-02001-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 07/12/2023] [Indexed: 09/06/2023] Open
Abstract
Spinal cord injury (SCI) is accompanied by loss of Zn2+, which is an important cause of glutamate excitotoxicity and death of local neurons as well as transplanted stem cells. Dental pulp stem cells (DPSCs) have the potential for neural differentiation and play an immunomodulatory role in the microenvironment, making them an ideal cell source for the repair of central nerve injury, including SCI. The zeolitic imidazolate framework 8 (ZIF-8) is usually used as a drug and gene delivery carrier, which can release Zn2+ sustainedly in acidic environment. However, the roles of ZIF-8 on neural differentiation of DPSCs and the effect of combined treatment on SCI have not been explored. ZIF-8-introduced DPSCs were loaded into gelatin methacryloyl (GelMA) hydrogel and in situ injected into the injured site of SCI rats. Under the effect of ZIF-8, axon number and axon length of DPSCs-differentiated neuro-like cells were significantly increased. In addition, ZIF-8 protected transplanted DPSCs from apoptosis in the damaged microenvironment. ZIF-8 promotes neural differentiation and angiogenesis of DPSCs by activating the Mitogen-activated protein kinase (MAPK) signaling pathway, which is a promising transport nanomaterial for nerve repair.
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Affiliation(s)
- Heng Zhou
- Center of Regenerative Medicine, Department of Stomatology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Shuili Jing
- Center of Regenerative Medicine, Department of Stomatology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Wei Xiong
- Center of Regenerative Medicine, Department of Stomatology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Yangzhi Zhu
- Terasaki Institute for Biomedical Innovation, Los Angeles, CA, 90095, USA
| | - Xingxiang Duan
- Center of Regenerative Medicine, Department of Stomatology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Ruohan Li
- Center of Regenerative Medicine, Department of Stomatology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Youjian Peng
- Center of Regenerative Medicine, Department of Stomatology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Tushar Kumeria
- School of Materials Science and Engineering, University of New South Wales, Sydney, NSW, Australia
| | - Yan He
- Center of Regenerative Medicine, Department of Stomatology, Renmin Hospital of Wuhan University, Wuhan, 430060, China.
- Institute of Regenerative and Translational Medicine, Tianyou Hospital of Wuhan University of Science and Technology, Wuhan, 430064, Hubei, China.
- Department of Oral and Maxillofacial Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, 02114, USA.
| | - Qingsong Ye
- Center of Regenerative Medicine, Department of Stomatology, Renmin Hospital of Wuhan University, Wuhan, 430060, China.
- Department of Oral and Maxillofacial Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, 02114, USA.
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Liu X, Zhang L, Jing S, Wu YJ, Su XY, Qiao YL. [Human papillomavirus vaccination for men who have sex with men in China: demand and suggestions]. Zhonghua Liu Xing Bing Xue Za Zhi 2023; 44:1321-1326. [PMID: 37661628 DOI: 10.3760/cma.j.cn112338-20221129-01010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
MSM are a high-risk population for HPV infection and related diseases. MSM can be effectively protected by quadrivalent and nine-valent HPV vaccines. This paper outlines the significance of providing HPV vaccination to MSM, summarizes the basis of HPV vaccination in MSM, and puts forward the following recommendations. First, China should expedite the development and approval of the HPV vaccine for male use. Second, HIV-positive MSM should vaccinate against HPV as soon as possible. Third, prioritize HPV vaccination for MSM individuals aged 26 or less. Fourth, for MSM aged over 26, catch-up vaccination or opportunistic vaccination should be provided when HPV vaccine resources are sufficient. Implementing this vaccination strategy can provide protection for the MSM and control the spread of sexually transmitted diseases.
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Affiliation(s)
- X Liu
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - L Zhang
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - S Jing
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - Y J Wu
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - X Y Su
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - Y L Qiao
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
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Zhou H, He Y, Xiong W, Jing S, Duan X, Huang Z, Nahal GS, Peng Y, Li M, Zhu Y, Ye Q. MSC based gene delivery methods and strategies improve the therapeutic efficacy of neurological diseases. Bioact Mater 2023; 23:409-437. [PMCID: PMC9713256 DOI: 10.1016/j.bioactmat.2022.11.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 11/08/2022] [Accepted: 11/13/2022] [Indexed: 12/05/2022] Open
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Zhou H, Jing S, Liu Y, Wang X, Duan X, Xiong W, Li R, Peng Y, Ai Y, Fu D, Wang H, Zhu Y, Zeng Z, He Y, Ye Q. Identifying the key genes of Epstein-Barr virus-regulated tumour immune microenvironment of gastric carcinomas. Cell Prolif 2022; 56:e13373. [PMID: 36519208 PMCID: PMC9977676 DOI: 10.1111/cpr.13373] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 11/15/2022] [Accepted: 11/21/2022] [Indexed: 12/23/2022] Open
Abstract
The Epstein-Barr virus (EBV) is involved in the carcinogenesis of gastric cancer (GC) upon infection of normal cell and induces a highly variable composition of the tumour microenvironment (TME). However, systematic bioinformatics analysis of key genes associated with EBV regulation of immune infiltration is still lacking. In the present study, the TCGA and GEO databases were recruited to analyse the association between EBV infection and the profile of immune infiltration in GC. The weighted gene co-expression analysis (WGCNA) was applied to shed light on the key gene modules associated with EBV-associated immune infiltration in GC. 204 GC tissues were used to analysed the expression of key hub genes by using the immunohistochemical method. Real-time PCR was used to evaluate the association between the expression of EBV latent/lytic genes and key immune infiltration genes. Our results suggested that EBV infection changed the TME of GC mainly regulates the TIICs. The top three hub genes of blue (GBP1, IRF1, and LAP3) and brown (BIN2, ITGAL, and LILRB1) modules as representative genes were associated with EBV infection and GC immune infiltration. Furthermore, EBV-encoded LMP1 expression is account for the overexpression of GBP1 and IRF1. EBV infection significantly changes the TME of GC, and the activation of key immune genes was more dependent on the invasiveness of the whole EBV virion instead of single EBV latent/lytic gene expression.
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Affiliation(s)
- Heng Zhou
- Center of Regenerative Medicine & Department of StomatologyRenmin Hospital of Wuhan UniversityWuhanChina
| | - Shuili Jing
- Center of Regenerative Medicine & Department of StomatologyRenmin Hospital of Wuhan UniversityWuhanChina
| | - Yu Liu
- College of Life and Health Sciences, Institute of Biology and MedicineWuhan University of Science and TechnologyWuhanHubeiChina
| | - Xuming Wang
- Department of PathologyGuilin Medical UniversityGuilinGuangxiChina
| | - Xingxiang Duan
- Center of Regenerative Medicine & Department of StomatologyRenmin Hospital of Wuhan UniversityWuhanChina
| | - Wei Xiong
- Center of Regenerative Medicine & Department of StomatologyRenmin Hospital of Wuhan UniversityWuhanChina
| | - Ruohan Li
- Center of Regenerative Medicine & Department of StomatologyRenmin Hospital of Wuhan UniversityWuhanChina
| | - Youjian Peng
- Center of Regenerative Medicine & Department of StomatologyRenmin Hospital of Wuhan UniversityWuhanChina
| | - Yilong Ai
- Foshan Hospital of Stomatology, School of Medicine, Foshan UniversityFoshanGuangdongChina
| | - Dehao Fu
- Department of Orthopaedics, Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghaiChina
| | - Hui Wang
- Demonstration Center for Experimental Basic Medicine Education, Wuhan UniversityWuhanChina
| | - Yaoqi Zhu
- Institute of Regenerative and Translational MedicineTianyou Hospital of Wuhan University of Science and TechnologyWuhanHubeiChina,Department of oral and maxillofacial surgeryHospital of Taikang Tongji (Wuhan)WuhanChina
| | - Zhi Zeng
- Department of PathologyRenmin Hospital of Wuhan UniversityWuhanChina
| | - Yan He
- Institute of Regenerative and Translational MedicineTianyou Hospital of Wuhan University of Science and TechnologyWuhanHubeiChina,Department of oral and maxillofacial surgery, Massachusetts General HospitalHarvard Medical SchoolBostonMassachusettsUSA
| | - Qingsong Ye
- Center of Regenerative Medicine & Department of StomatologyRenmin Hospital of Wuhan UniversityWuhanChina,Department of oral and maxillofacial surgery, Massachusetts General HospitalHarvard Medical SchoolBostonMassachusettsUSA
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Xiong W, Liu Y, Zhou H, Jing S, He Y, Ye Q. Alzheimer’s disease: Pathophysiology and dental pulp stem cells therapeutic prospects. Front Cell Dev Biol 2022; 10:999024. [PMID: 36187488 PMCID: PMC9520621 DOI: 10.3389/fcell.2022.999024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 08/30/2022] [Indexed: 11/13/2022] Open
Abstract
Alzheimer’s disease (AD) is a destructive neurodegenerative disease with the progressive dysfunction, structural disorders and decreased numbers of neurons in the brain, which leads to long-term memory impairment and cognitive decline. There is a growing consensus that the development of AD has several molecular mechanisms similar to those of other neurodegenerative diseases, including excessive accumulation of misfolded proteins and neurotoxic substances produced by hyperactivated microglia. Nonetheless, there is currently a lack of effective drug candidates to delay or prevent the progression of the disease. Based on the excellent regenerative and reparative capabilities of stem cells, the application of them to repair or replace injured neurons carries enormous promise. Dental pulp stem cells (DPSCs), originated from ectomesenchyme of the cranial neural crest, hold a remarkable potential for neuronal differentiation, and additionally express a variety of neurotrophic factors that contribute to a protective effect on injured neuronal cells. Notably, DPSCs can also express immunoregulatory factors to control neuroinflammation and potentiate the regeneration and recovery of injured neurons. These extraordinary features along with accessibility make DPSCs an attractive source of postnatal stem cells for the regeneration of neurons or protection of existing neural circuitry in the neurodegenerative diseases. The present reviews the latest research advance in the pathophysiology of AD and elaborate the neurodifferentiation and neuroprotective properties of DPSCs as well as their application prospects in AD.
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Affiliation(s)
- Wei Xiong
- Center of Regenerative Medicine, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, China
| | - Ye Liu
- Center of Regenerative Medicine, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, China
| | - Heng Zhou
- Center of Regenerative Medicine, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, China
| | - Shuili Jing
- Center of Regenerative Medicine, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, China
| | - Yan He
- Institute of Regenerative and Translational Medicine, Tianyou Hospital, Wuhan University of Science and Technology, Wuhan, China
- *Correspondence: Qingsong Ye, ; Yan He,
| | - Qingsong Ye
- Center of Regenerative Medicine, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, China
- *Correspondence: Qingsong Ye, ; Yan He,
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Wang J, Yu H, Hua Q, Jing S, Liu Z, Peng X, Cao C, Luo Y. A descriptive study of random forest algorithm for predicting COVID-19 patients outcome. PeerJ 2020; 8:e9945. [PMID: 32974109 PMCID: PMC7486830 DOI: 10.7717/peerj.9945] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [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: 05/04/2020] [Accepted: 08/25/2020] [Indexed: 01/10/2023] Open
Abstract
Background The outbreak of coronavirus disease 2019 (COVID-19) that occurred in Wuhan, China, has become a global public health threat. It is necessary to identify indicators that can be used as optimal predictors for clinical outcomes of COVID-19 patients. Methods The clinical information from 126 patients diagnosed with COVID-19 were collected from Wuhan Fourth Hospital. Specific clinical characteristics, laboratory findings, treatments and clinical outcomes were analyzed from patients hospitalized for treatment from 1 February to 15 March 2020, and subsequently died or were discharged. A random forest (RF) algorithm was used to predict the prognoses of COVID-19 patients and identify the optimal diagnostic predictors for patients' clinical prognoses. Results Seven of the 126 patients were excluded for losing endpoints, 103 of the remaining 119 patients were discharged (alive) and 16 died in the hospital. A synthetic minority over-sampling technique (SMOTE) was used to correct the imbalanced distribution of clinical patients. Recursive feature elimination (RFE) was used to select the optimal subset for analysis. Eleven clinical parameters, Myo, CD8, age, LDH, LMR, CD45, Th/Ts, dyspnea, NLR, D-Dimer and CK were chosen with AUC approximately 0.9905. The RF algorithm was built to predict the prognoses of COVID-19 patients based on the best subset, and the area under the ROC curve (AUC) of the test data was 100%. Moreover, two optimal clinical risk predictors, lactate dehydrogenase (LDH) and Myoglobin (Myo), were selected based on the Gini index. The univariable logistic analysis revealed a substantial increase in the risk for in-hospital mortality when Myo was higher than 80 ng/ml (OR = 7.54, 95% CI [3.42-16.63]) and LDH was higher than 500 U/L (OR = 4.90, 95% CI [2.13-11.25]). Conclusion We applied an RF algorithm to predict the mortality of COVID-19 patients with high accuracy and identified LDH higher than 500 U/L and Myo higher than 80 ng/ml to be potential risk factors for the prognoses of COVID-19 patients in the early stage of the disease.
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Affiliation(s)
- Jie Wang
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, China
| | - Heping Yu
- Department of Nail and Breast Surgery, Wuhan Forth Hospital, Wuhan, Hubei, China
| | - Qingquan Hua
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, China
| | - Shuili Jing
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, China
| | - Zhifen Liu
- Department of Nephrology, Wuhan Forth Hospital, Wuhan, Hubei, China
| | - Xiang Peng
- Department of Neurosurgery, Wuhan Forth Hospital, Wuhan, Hubei, China
| | - Cheng'an Cao
- Department of Neurosurgery, Wuhan Forth Hospital, Wuhan, Hubei, China
| | - Yongwen Luo
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
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Zhao Q, Wang J, Guo H, Li Y, Lin C, Cheng Y, Zhang Z, Wang D, Zhao X, Liu Y, Jing S, Yang P, Tian Y, Liu Y. 1427P A phase II study of neoadjuvant concurrent chemoradiotherapy with apatinib for HER-2 negative Siewert type II and III adenocarcinoma of esophagogastric junction. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.1933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Jing S, Lu J, Song J, Luo S, Zhou L, Quan C, Xi J, Zhao C. P.376Effect of low-dose rituximab treatment on T- and B-cell lymphocyte imbalance in refractory myasthenia gravis. Neuromuscul Disord 2019. [DOI: 10.1016/j.nmd.2019.06.538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Guo Z, Zhang J, Gong Z, Jing S. Correlation of factors associated with postoperative infection in patients with malignant oral and maxillofacial tumours: a logistic regression analysis. Br J Oral Maxillofac Surg 2019; 57:460-465. [DOI: 10.1016/j.bjoms.2019.04.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 04/04/2019] [Indexed: 11/25/2022]
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Haige Z, Jing S, Yixing C, Zhaochong Z. EP-1429 IG-IMRT improves short-term survival for lymph node metastases from hepatocellular carcinoma. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)31849-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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Chen W, Jing M, Zhang Q, Yuan R, Jing S. A meta-analysis evaluating the relationship between IL-18 gene promoter polymorphisms and an individual's susceptibility to HCV infection. Acta Gastroenterol Belg 2018; 81:39-44. [PMID: 29562376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
BACKGROUND Several observational studies have investigated interleukin-18 (IL-18) gene polymorphisms with regard to susceptibility to hepatitis C virus (HCV) infection, but the results have been inconsistent. AIM To evaluate the relationships between functional polymorphisms in the IL-18 gene and an individual's susceptibility to HCV infection, a meta-analysis was performed. Methods: A literature search was conducted using the PubMed, EMBASE, Web of Science and China BioMedicine databases to investigate the correlation between IL-18 gene polymorphisms and susceptibility to HCV infection. Crude odds ratios (ORs) with 95% confidence intervals (CIs) were calculated. RESULTS The polymorphisms IL-18-607 C>A and -137 G>C were correlated with susceptibility to HCV infection in Asian populations. However, there was no evidence indicating a correlation between either of these polymorphisms and susceptibility to HCV infection in Caucasian populations. CONCLUSIONS Our current meta-analysis suggests that the -607 C>A and -137 G>C polymorphisms in the IL-18 gene promoter play important roles in determining the response to HCV in Asian populations. More studies with larger sample sizes are needed to evaluate the associations between IL-18 genetic polymorphisms and HCV infection risk.
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Affiliation(s)
- W Chen
- Medical School, Kunming University of Science and Technology, 727 South Jingming Road, Kunming, Yunnan, 650500, China
| | - M Jing
- Medical School, Kunming University of Science and Technology, 727 South Jingming Road, Kunming, Yunnan, 650500, China
| | - Q Zhang
- Medical School, Kunming University of Science and Technology, 727 South Jingming Road, Kunming, Yunnan, 650500, China
| | - R Yuan
- Medical School, Kunming University of Science and Technology, 727 South Jingming Road, Kunming, Yunnan, 650500, China
| | - S Jing
- Medical School, Kunming University of Science and Technology, 727 South Jingming Road, Kunming, Yunnan, 650500, China
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Wang J, Zhao Q, Huang X, Jing S, Wang Y, Cao F. Feasibility Analysis of Involved-Field Irradiation in Patients With Locally Advanced Adenocarcinoma of the Gastroesophageal Junction in Siewert’s Type 2 and 3 Undergoing Preoperative Concurrent Chemoradiation Therapy. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.1071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Cheng Y, Wang Q, Wang J, Jing S, Liu Q. Nutrition Status and Inflammatory Indexes Could Predict Acute Toxicity After Concurrent Chemoradiation Therapy for Esophageal Carcinoma. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Trowbridge IS, Collawn J, Jing S, White S, Esekogwu V, Stangel M. Structure-function analysis of the human transferrin receptor: effects of anti-receptor monoclonal antibodies on tumor growth. Curr Stud Hematol Blood Transfus 2015:139-47. [PMID: 1954762 DOI: 10.1159/000419352] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- I S Trowbridge
- Department of Cancer Biology, Salk Institute, San Diego, Calif
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Zhao L, Chen X, Cai L, Zhang C, Wang Q, Jing S, Chen G, Li J, Zhang J, Fang Y. Randomized, double-blind, placebo-controlled, multiple-dose study of the safety, tolerability and pharmacokinetics of benvitimod, a candidate drug for the treatment of psoriasis. J Clin Pharm Ther 2014; 39:418-23. [PMID: 24673513 DOI: 10.1111/jcpt.12158] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Accepted: 02/25/2014] [Indexed: 12/01/2022]
Affiliation(s)
- L. Zhao
- Phase I Research Unit; Department of Pharmacy; Peking University People's Hospital; Beijing China
| | - X. Chen
- Phase I Research Unit; Department of Pharmacy; Peking University People's Hospital; Beijing China
| | - L. Cai
- Department of dermatology; Peking University People's Hospital; Beijing China
| | - C. Zhang
- Phase I Research Unit; Department of Pharmacy; Peking University People's Hospital; Beijing China
| | - Q. Wang
- Phase I Research Unit; Department of Pharmacy; Peking University People's Hospital; Beijing China
| | - S. Jing
- Phase I Research Unit; Department of Pharmacy; Peking University People's Hospital; Beijing China
| | - G. Chen
- Celestial Pharmaceuticals Co., Ltd; Shenzhen China
| | - J. Li
- Celestial Pharmaceuticals Co., Ltd; Shenzhen China
| | - J. Zhang
- Department of dermatology; Peking University People's Hospital; Beijing China
| | - Y. Fang
- Phase I Research Unit; Department of Pharmacy; Peking University People's Hospital; Beijing China
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Wang J, Yu J, Jing S, Cheng Y, Liu Q, Wang Y, Cao F, Shang K, Jiao W, Long S. Overexpression of Epidermal Growth Factor Receptor and Its Clinicopathological Significance: A Meta-Analysis of 1118 Cases With Esophageal Squamous Cell Carcinoma. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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Wang J, Cao F, Jing S, Wang Y, Liu Q, Cheng Y, Shang K, Jiao W, Long S. Prognostic Analysis in 182 Thoracic Esophageal Carcinoma Patients With Atypical Hyperplasia in Esophageal Stump and Esophageal Stump Cancer After Esophagectomy. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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21
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Jing S, Liu B, Peng L, Peng X, Zhu L, Fu Q, He G. Development and use of EST-SSR markers for assessing genetic diversity in the brown planthopper (Nilaparvata lugens Stål). Bull Entomol Res 2012; 102:113-122. [PMID: 21896240 DOI: 10.1017/s0007485311000435] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
To assess genetic diversity in populations of the brown planthopper (Nilaparvata lugens Stål) (Homoptera: Delphacidae), we have developed and applied microsatellite, or simple sequence repeat (SSR), markers from expressed sequence tags (ESTs). We found that the brown planthopper clusters of ESTs were rich in SSRs with unique frequencies and distributions of SSR motifs. Three hundred and fifty-one EST-SSR markers were developed and yielded clear bands from samples of four brown planthopper populations. High cross-species transferability of these markers was detected in the closely related planthopper N. muiri. The newly developed EST-SSR markers provided sufficient resolution to distinguish within and among biotypes. Analyses based on SSR data revealed host resistance-based genetic differentiation among different brown planthopper populations; the genetic diversity of populations feeding on susceptible rice varieties was lower than that of populations feeding on resistant rice varieties. This is the first large-scale development of brown planthopper SSR markers, which will be useful for future molecular genetics and genomics studies of this serious agricultural pest.
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Affiliation(s)
- S Jing
- State Key Laboratory of Hybrid Rice, College of Life Science, Wuhan University, Wuhan, People's Republic of China
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Yue L, Jing S, Chunliu H, Weimin L, Baofeng Y, Zhenwei P, Deli D, Guangzhong L, Li S, Lei L, Danghui S, Xiangyang T, Zhihua G, Yongtai G. Ketamine-induced ventricular structural, sympathetic and electrophysiologic remodelling: pathological consequences and protective effects of metoprolol. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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24
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Hu L, Shen L, Li D, Nie P, Jing S, Xiao H, Shao Q, Yi J. Atorvastatin suppress oxidised low density lipoprotein-induced dendritic cell-like differentiation of RAW264.7 cells by inactivation of the p38 MAPK pathway. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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25
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Hong W, Jing L, Xianxian Z, Bo L, Yanyan W, Xing Z, Jing S, Jingwei P, Fuzhi G, Weiping L, Ersong W, Yongwen Q. Transcatheter closure of very large secundum atrial septal defects: long-term follow-up study. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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26
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Yue L, Jing S, Weimin L, Baofeng Y, Hongbo S, Deli D, Zhenwei P, Li S, Guangzhong L, Jiyi Z, Hongjie X, Danghui S, Ning Y, Yongtai G. Atorvastatin attenuates atrial structural, autonomic and electrophysiologic remodelling by its anti-oxidant and anti-inflammatory action in atrial fibrillation dogs. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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27
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Mannan T, Jing S, Foroushania SH, Fortune F, Wan H. RNAi-mediated inhibition of the desmosomal cadherin (desmoglein 3) impairs epithelial cell proliferation. Cell Prolif 2011; 44:301-10. [PMID: 21702856 DOI: 10.1111/j.1365-2184.2011.00765.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
OBJECTIVES Desmoglein 3 (Dsg3) is a desmosomal adhesion protein expressed in basal and immediate suprabasal layers of skin. Importance of Dsg3 in cell-cell adhesion and maintenance of tissue integrity is illustrated by findings of keratinocyte dissociation in the autoimmune disease, pemphigus vulgaris, where autoantibodies target Dsg3 on keratinocyte surfaces and cause Dsg3 depletion from desmosomes. However, recognition of possible participation of involvement of Dsg3 in cell proliferation remains controversial. Currently, available evidence suggests that Dsg3 may have both anti- and pro-proliferative roles in keratinocytes. The aim of this study was to use RNA interference (RNAi) strategy to investigate effects of silencing Dsg3 in cell-cell adhesion and cell proliferation in two cell lines, HaCaT and MDCK. MATERIALS AND METHODS Cells were transfected with siRNA, and knockdown of Dsg3 was assessed by western blotting, fluorescence-activated cell sorting and confocal microscopy. Cell-cell adhesion was analysed using the hanging drop/fragmentation assay, and cell proliferation by colony forming efficiency, BrdU incorporation, cell counts and organotypic culture. RESULTS Silencing Dsg3 caused defects in cell-cell adhesion and concomitant reduction in cell proliferation in both HaCaT and MDCK cells. CONCLUSION These findings suggest that Dsg3 depletion by RNAi reduces cell proliferation, which is likely to be secondary to a defect in cell-cell adhesion, an essential function required for cell differentiation and morphogenesis.
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Affiliation(s)
- T Mannan
- Queen Mary University of London, Barts and The London School of Medicine and Dentistry, Centre for Clinical and Diagnostic Oral Sciences, Institute of Dentistry, UK
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Jing S, Yidong W, Yuanyuan F, Yong W, Lei H, Yawei X. e0365 Clinical study on relationship between serum gamma-glutamyltransferase and coronary heart disease in women. Heart 2010. [DOI: 10.1136/hrt.2010.208967.365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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29
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Gu L, Zhang Y, Niu X, Jing S, Zhou Y, Wang F, Zhang C. PP-063 The Research of signal transduction mechanism in Ana-1 Cells infected by Influenza Virus (FM1) and the Intervention of Dureping Injection. Int J Infect Dis 2008. [DOI: 10.1016/s1201-9712(09)60214-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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30
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Yun-Peng L, Jingdong Z, Yuee T, Bo J, Ping Y, Mingfang Z, Jing S, Lingyun Z, Zhi L. Randomized phase II study of thalidomide for the control of delayed chemotherapy-induced nausea and vomiting. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.9614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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31
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Yang SM, Jing S, Doi T, Kaneko T, Yamashita T. Isolation of Guinea pig inner hair cells using manual microsurgical dissection. ORL J Otorhinolaryngol Relat Spec 2002; 64:1-5. [PMID: 11891389 DOI: 10.1159/000049078] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Cochlear inner hair cells (IHCs) and outer hair cells (OHCs) show distinctive morphological features that are usually sufficient to distinguish these two species in vitro. However, OHCs may sometimes resemble IHCs when they are mechanically distorted or begin swelling at their basal end. As a result, accurately discriminating the cells based on morphology was thought to be problematic. An objective method that allows us to clearly and unambiguously distinguish these two cell types is therefore of continued interest. We describe a protocol in which solitary IHCs were harvested from guinea pig cochlea using a manual microsurgical dissection.
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Affiliation(s)
- S M Yang
- Department of Otolaryngology, Kansai Medical University, Osaka, Japan
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Yu Q, Ma L, Jing S, Xu Y, Geng D. [Clinic significance of nm23, collage IV and PCNA expression in non-small cell lung cancer]. Zhongguo Fei Ai Za Zhi 2001; 4:469-70. [PMID: 21106162 DOI: 10.3779/j.issn.1009-3419.2001.06.21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND To study the significance of nm23, collagen IV and PCNA expressions in non-small cell lung cancer. METHODS Expressions of the nm23, collagen IV and PCNA in 84 cases of non-small cell lung cancer were examined with SP immunohistochemical technique. Of the 84 cases, there were squamous cell carcinoma 42, adenocarcinoma 42, stage I 27, stage II 24, stage III 24, and stage IV 9. Statistical analysis was performed with Chi-Square test. RESULTS Expressions of the nm23, collagen IV and PCNA in 84 cases of non-small cell lung cancer were 60. 7% ( 51/ 84) , 75. 0% ( 63/ 84) and 53. 6% ( 45/ 84) respectively. There was negative correlation between the lymph node metastasis and the expressions of nm23 and collagen IV in squamous cell carcinoma, and the expressions of collagen IV and PCNA were associated with tumor differentiation. No correlation was found between TNM stage and expressions of nm23, collagen IV and PCNA. CONCLUSIONS The results indicate that nm23, collagen IV and PCNA participate the modulation of metastasis of non-small cell lung cancer and that they may be used to evaluate the potential of metastasis.
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Affiliation(s)
- Q Yu
- Liaoning Provincial Hospital, Shengyang , Liaoning 110015, P. R . China
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Jing S, Ju Y, He Y, He M, Mao B. Clinical features of diffuse axonal injury. Chin J Traumatol 2001; 4:204-7. [PMID: 11835733] [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: 02/04/2023] Open
Abstract
OBJECTIVE To analyze the mechanism of diffuse axonal injury (DAI) and study the relationship between DAI and brain concussion, brain contusion, and primary brain stem injury. METHODS The clinical data and iconographic characteristics of 56 patients with DAI were analyzed retrospectively. RESULTS Traffic accidents were the main cause of DAI. Among t he 56 cases, 34 were injured for at least twice, and 71.43% of the patients were complicated with contusion. CONCLUSIONS It is considered that DAI is a common pattern of primary brain injury, which is often underestimated. And DAI includes cerebral concussion and primary brain injury, and is often complicated by cerebral cortex contusion. Therefore, it is very simple and practical to divide primary brain injuries into local and diffuse injuries.
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Affiliation(s)
- S Jing
- Department of Neurosurgery, First Affiliated Hospital, West China University of Medical Sciences, Chengdu 610041, China
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Markell D, Hui J, Narhi L, Lau D, LeBel C, Aparisio D, Lile J, Jing S, Yui D, Chang BS. Pharmaceutical significance of the cyclic imide form of recombinant human glial cell line derived neurotrophic factor. Pharm Res 2001; 18:1361-6. [PMID: 11683253 DOI: 10.1023/a:1013058532425] [Citation(s) in RCA: 6] [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: 11/12/2022]
Abstract
PURPOSE The purpose of this paper is to determine the significance of cyclic imide formation of an aspartic acid residue during storage on the pharmaceutical quality of a recombinant human glial cell line-derived neurotrophic factor (rhGDNF) formulation. METHODS A combination of chromatography, peptide mapping, mass spectroscopy, and protein sequencing was used to purify and characterize the degradation product. Circular dichroism, 1,8-ANS and heparin binding, melting temperature determination, bioassays, and preclinical pharmacokinetic and toxicology testing were performed to examine its equivalence to native rhGDNF. RESULTS The rhGDNF with cyclic imide at aspartic acid residue 96 showed identical activity, structure, pharmacokinetic profile, and toxicity profile to the native rhGDNF. CONCLUSIONS Formation of cyclic imide at aspartic acid residue 96 does not affect the pharmaceutical quality of the rhGDNF formulation.
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Affiliation(s)
- D Markell
- Department of Pharmaceutics and Drug Delivery, Amgen, Inc., Thousand Oaks, CA 91320, USA
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Abstract
Targeted expression of the SV40 large T-antigen oncoprotein (T-Ag) induces cardiomyocyte proliferation in the atria and ventricles of transgenic mice. Previous studies have identified the p53 tumor suppressor, p107 (a homologue of the retinoblastoma tumor suppressor), and p193 (a novel BH3 only proapoptosis protein) as prominent TAg binding proteins in cardiomyocyte cell lines derived from these transgenic mice. To further explore the significance of these protein-protein interactions in the regulation of cardiomyocyte proliferation, a transgene comprising the human atrial natriuretic factor (ANF) promoter and sequences encoding a mutant T-Ag lacking the p53 binding domain was generated. Repeated micro-injection of this DNA gave rise to genetically mosaic animals with minimal transgene content, suggesting that widespread cardiac expression of mutant T-Ag was deleterious. This notion was supported by the observation that the transgene was selectively lost from the cardiac myocytes (but not the cardiac fibroblasts) in the mosaic animals. Crosses between the mosaic mice and animals expressing a cardiac restricted dominant negative p53 resulted in transgene transmission with ensuing overt cardiac tumorigenesis. Transfection of the mutant T-Ag in embryonic stem (ES) cell-derived cardiomyocytes resulted in wide-spread cell death with characteristics typical of apoptosis. Co-transfection with a dominant negative p53 transgene rescued mutant TAg-induced cell death in the ES-derived cardiomyocyte cultures, resulting in a marked proliferative response similar to that seen in vivo with the rescued transgenic mouse study. These results indicate that T-Ag expression in the absence of p53 functional abrogation results in cardiomyocyte death.
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Affiliation(s)
- N E Huh
- Wells Center for Pediatric Research and Krannert Institute of Cardiology, Indiana University School of Medicine, Indianapolis, IN 46202-5225, USA
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Abstract
Endogenous retinoic acid may play a role in inducing smooth muscle differentiation in the fetal ductus arteriosus. Maternal administration of retinoic acid may accelerate the process. This study was designed to investigate the effect of vitamin A on developmental changes in the contractile system of the ductus. Vitamin A was injected into pregnant rats and the ductus was isolated from the fetus at 19, 20, or 21 d of gestation. The fetus at 19 d of gestation served as a model of the preterm fetus. The force of contraction and [Ca]i were measured. Membrane depolarization caused by high KCl induced ductal contraction in all age groups studied. In the 19-d fetus, O2 did not cause significant contraction or changes in [Ca]i in the control group, but it did induce a significant contraction and increases in [Ca]i in the vitamin A-treated group. In the 20- and 21-d fetuses, 5% O2-induced contraction in the vitamin A-treated group was significantly greater than in the control group. In the 19-d fetus, noradrenaline-induced contraction and increases in [Ca]i, indicators of the size of the intracellular Ca pool, were observed and they were similar in the control group and in the vitamin A-treated group. These data suggest that 1) in the preterm fetus, the contractile system, including membrane depolarization, [Ca]i increase, and its activation of contractile proteins, is already functioning, but the O2-sensing mechanism is underdeveloped, 2) vitamin A accelerates the development of the O2-sensing mechanism of the ductus arteriosus.
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Affiliation(s)
- G R Wu
- Department of Pediatric Cardiology, The Heart Institute of Japan, Tokyo Women's Medical University, Tokyo, 162 Japan
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Jing S, Li H. Hopper-valve for fine powders in a moving-bed standpipe. POWDER TECHNOL 2001. [DOI: 10.1016/s0032-5910(00)00240-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Chai J, Yang H, Li L, Guo Z, Sheng Z, Xu M, Chen B, Jia X, Jing S, Lu J, Li G. [Clinical use of acellular allogenic dermis or acellular porcine dermis with split-thickness autologous skin graft in 119 cases]. Zhonghua Wai Ke Za Zhi 2000; 38:790-3. [PMID: 11832167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To observe the effect of acellular allogenic dermis or acellular porcine dermis together with split-thickness autologous skin graft on coverage of deep burn wound and the wound of scar excision. METHODS Acellular allogenic dermis or acellular porcine dermis produced by our unit, with split-thickness autologous skin graft, were used in repairing various wounds in 119 cases. The take rate of various wounds was compared, and the take rate of wounds in which autologous skin from different sites was used to cover either acellular allogenic dermis or acellular porcine dermis was also compared. Histological examination and follow-up were made in some cases. RESULTS After tangential excision, eschar excision and scar excision, the wounds were covered with either allogenic acellular dermis or porcine acellular dermis and autologous split-thickness skin. The take rate was found to be (93.4 +/- 3.4)%, (92.1 +/- 4.6)%, (94.5 +/- 3.5)%, respectively. There was no a significant difference in take rate (P > 0.05). No significant difference in take rate between the transplantation of allogenic acellular dermis with autologous split-thickness skin and transplantation of porcine acellular dermis with autologous split-thickness skin was found (P > 0.05). When autologous split-thickness skin harvested from the trunk or extremities was used, the take rate was (93.1 +/- 4.8)%, (89.0 +/- 6.2)%, respectively, whereas the take rate was only about 70% - 80% when skin harvested from the scalp was used. The take rate was only about 40% when acellular allogenic dermis and autologous micro-skin graft were used to cover the wound. Histological examination 19 months after the transplantation revealed normal structure. Collagenous fibers were orderly arranged. There was no apparent hyperplasia of collagenous fibers. Hair follicles, sweat glands and other skin appendages were not found in the healed area. Grossly, no obvious pigmentation was seen, the surface was smooth with slight wound contraction, and the consistency was flexible. CONCLUSION Acellular allogenic split-thickness dermis or acellular porcine split-thickness dermis with autologous split-thickness dermis for coverage of deep burn wound and the wound of scar excision is an ideal material.
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Affiliation(s)
- J Chai
- Burns Institute, 304th Hospital, People's liberation Army, Beijing 100037, China
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Pasumarthi KB, Nakajima H, Nakajima HO, Jing S, Field LJ. Enhanced cardiomyocyte DNA synthesis during myocardial hypertrophy in mice expressing a modified TSC2 transgene. Circ Res 2000; 86:1069-77. [PMID: 10827137 DOI: 10.1161/01.res.86.10.1069] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Tuberous sclerosis complex (TSC) is a rare genetic disorder characterized by the appearance of benign tumors in multiple organs, including the heart. Disease progression is accompanied by homozygous mutation at 1 of 2 loci (designated TSC1 or TSC2), leading to the suggestion that these genes function as tumor suppressors. In this study, we generated a series of TSC2 cDNAs in which one or more structural motifs were deleted, with the hope that expression of the modified gene product would override the growth-inhibitory activity of the endogenous TSC2 gene product. Several of the modified cDNAs enhanced growth rate, increased endocytosis, and promoted aberrant protein trafficking when expressed in NIH-3T3 cells, thereby mimicking phenotypes typical of TSC2-deficient cells. Surprisingly, targeted expression of the most potent TSC2 cDNA to the heart did not perturb cardiac development. However, the level of cardiomyocyte DNA synthesis in adult transgenic mice was elevated >35-fold during isoproterenol-induced hypertrophy compared with their nontransgenic siblings. These results suggest that alteration of TSC2 gene activity in combination with beta-adrenergic stimulation can reactivate the cell cycle in a limited number of terminally differentiated adult cardiomyocytes.
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Affiliation(s)
- K B Pasumarthi
- Wells Center for Pediatric Research and Krannert Institute of Cardiology, Indiana University School of Medicine, Indianapolis, USA
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40
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Nakajima H, Nakajima HO, Salcher O, Dittiè AS, Dembowsky K, Jing S, Field LJ. Atrial but not ventricular fibrosis in mice expressing a mutant transforming growth factor-beta(1) transgene in the heart. Circ Res 2000; 86:571-9. [PMID: 10720419 DOI: 10.1161/01.res.86.5.571] [Citation(s) in RCA: 178] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Increased transforming growth factor (TGF)-beta(1) activity has been observed during pathologic cardiac remodeling in a variety of animal models. In an effort to establish a causal role of TGF-beta(1) in this process, transgenic mice with elevated levels of active myocardial TGF-beta(1) were generated. The cardiac-restricted alpha-myosin heavy chain promoter was used to target expression of a mutant TGF-beta(1) cDNA harboring a cysteine-to-serine substitution at amino acid residue 33. This alteration blocks covalent tethering of the TGF-beta(1) latent complex to the extracellular matrix, thereby rendering a large proportion (>60%) of the transgene-encoded TGF-beta(1) constitutively active. Although similar levels of active TGF-beta(1) were present in the transgenic atria and ventricles, overt fibrosis was observed only in the atria. Surprisingly, increased active TGF-beta(1) levels inhibited ventricular fibroblast DNA synthesis in uninjured hearts and delayed wound healing after myocardial injury. These data suggest that increased TGF-beta(1) activity by itself is insufficient to promote ventricular fibrosis in the adult mouse ventricle.
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Affiliation(s)
- H Nakajima
- Herman B. Wells Center for Pediatric Research and Krannert Institute of Cardiology, Indiana University School of Medicine, Indianapolis, Ind, USA
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Abstract
Thymoma is the most common tumor of the anterior-superior mediastinum. We have identified a line of transgenic mice which spontaneously and heritably develop thymomas at a very high penetrance. The available data suggest that thymoma formation in these mice results as a consequence of transgene insertional mutagenesis. Immune histologic analyses indicate that the thymomas are of epithelial cell origin. Survival studies indicate that tumor progression is more aggressive in females as compared to males (73.9 vs 41.7% mortality at 20 weeks of age, respectively). Fluorescent in situ hybridizations have localized the transgene integration site to the F2-G region of mouse chromosome 2. Translocation encompassing the syntenic region in humans has been implicated in lympho-epithelial thymoma. These animals may constitute a useful resource for the identification of gene(s) which participate in thymoma progression, as well as a model system for screening anti-thymoma therapeutic agents.
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Affiliation(s)
- H Nakajima
- Herman B Wells Center for Pediatric Research Indiana University School of Medicine, Riley Hospital, 702 Barnhill Drive, Room 2600, Indianapolis, Indiana, IN 46202-5225, USA
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42
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Yue Y, Su J, Cerretti DP, Fox GM, Jing S, Zhou R. Selective inhibition of spinal cord neurite outgrowth and cell survival by the Eph family ligand ephrin-A5. J Neurosci 1999; 19:10026-35. [PMID: 10559410 PMCID: PMC6782947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023] Open
Abstract
The Eph family tyrosine kinase receptors and their ligands, the ephrins, have been shown to play critical roles in cell migration, tissue morphogenesis, and axonal guidance in many different systems. However, their function in the spinal cord has not been examined carefully. We showed in this study that several Eph receptors, including EphA3, Eph A4, and Eph A5, are expressed in the ventral spinal cord in partially overlapping patterns, with EphA5 exhibiting the most widespread transcription in the entire ventral spinal cord during early development. Complementary to the receptor expression, a ligand of these receptors, ephrin-A5, is transcribed in the dorsal half of the spinal cord. Consistent with the spatial location of receptor expression, the ligand selectively inhibits neurite outgrowth and induces cell death of the ventral, but not the dorsal, spinal cord neurons. These observations suggest that interactions between the Eph family receptors and ligands exerts negative influences on ventral spinal cord neurons and thus may play important roles in regulating morphogenesis and axon guidance in the spinal cord.
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Affiliation(s)
- Y Yue
- Laboratory for Cancer Research, College of Pharmacy, Rutgers University, Piscataway, New Jersey 08854, USA
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43
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Prasolova LA, Jing S. [The coat color mutation in silver foxes (Vulpes vulpes): morphology of guard hairs]. Genetika 1999; 35:1269-1273. [PMID: 10576059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The structure of guard hairs was analyzed in the mottling mutants of silver foxes. The mottling mutation occurred in the population of silver foxes which has been subjected to domestication. Hairs from the mottling areas were shown to have the following distinctions from silvery-black hairs: the lack of clear grana-shaft separation, a lesser thickness and length, another shape and pattern of guard-hair scales, another thickness ratio between cortical and medullar layers, a lesser number of melanocytes in hair bulbs, and a lesser number of dendritic processes in melanocytes. Putative mechanisms underlying the phenotypic effect of the mutant gene that controls mottling are suggested.
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Affiliation(s)
- L A Prasolova
- Institute of Cytology and Genetics, Russian Academy of Sciences, Novosibirsk, Russia.
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44
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Gao F, Zhang W, Jing S, Liu Y, Zhang B. [Detection of telomerase activity in gastric cancer and adjacent tissues]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1999; 21:298-301. [PMID: 12567454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
OBJECTIVE To study the telomerase activity in chinese gastric cancer and their adjacent tissues and to explore the possibility of telomerase as a tumor biological marker. METHODS Telomerase activity was analyzed in 42 primary gastric cancers and their adjacent tissues and 1 benign gastric lesion by a PCR-based telomerase repeat amplification protocol assay. RESULTS The result showed 88.1% (37/42) gastric cancerous specimens displayed telomerase activity. However, only 2 of 42 tissue samples adjacent to the gastric cancer showed telomerase activity. However our results indicated that 1 benign gastric lesion sample expressed telomerase activity. CONCLUSIONS The results indicated that the detection of telomerase activity might be a useful method in the diagnosis of gastric cancer.
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Affiliation(s)
- F Gao
- Department of Abdominal Surgery and Centre of Tumor Biology, Cancer Hospital, CAMS and PUMC, Beijing 100021
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45
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Affiliation(s)
- J Yao
- Hangzhou City Plastic Surgery Hospital, Zhejiang Province, People's Republic of China
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46
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Carlomagno F, Melillo RM, Visconti R, Salvatore G, De Vita G, Lupoli G, Yu Y, Jing S, Vecchio G, Fusco A, Santoro M. Glial cell line-derived neurotrophic factor differentially stimulates ret mutants associated with the multiple endocrine neoplasia type 2 syndromes and Hirschsprung's disease. Endocrinology 1998; 139:3613-9. [PMID: 9681515 DOI: 10.1210/endo.139.8.6124] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Ret is a receptor tyrosine kinase involved in several neoplastic and developmental diseases affecting the thyroid gland and tissues of neuroectodermal origin. Different ret mutations are associated with different disease phenotypes. Gain-of-function of ret is caused by gene rearrangements in thyroid papillary carcinomas and by point mutations in multiple endocrine neoplasia (MEN) type 2A syndrome (MEN2A), in familial medullary thyroid carcinoma (FMTC), and in the more severe MEN2B syndrome. Conversely, Hirschsprung's disease (HSCR) is associated with loss of function of ret. Recently, it has been shown that glial cell line-derived neurotrophic factor (GDNF), by binding to the accessory molecule GDNFR-alpha, acts as a functional ligand of Ret and stimulates its tyrosine kinase and biological activity. To ascertain whether the biological effects of ret mutations are modulated by GDNF, we have investigated the responsiveness to GDNF of ret mutants in cell lines coexpressing GDNFR-alpha and MEN2A-, MEN2B-, FMTC-, or HSCR-associated ret mutants. Here, we show that triggering of GDNF affected only ret/MEN2B, i.e. it stimulated ret/MEN2B mitogenic and kinase activities, as well as its ability to phosphorylate Shc, a bona fide Ret substrate. In contrast, ret mutants associated with MEN2A or FMTC (carrying Cys634 or Cys620 mutations) were unresponsive to GDNF. HSCR mutations, by affecting either the extracellular or the intracellular Ret domain, impaired responsiveness to GDNF. These data suggest that the phenotype of human diseases caused by ret mutations can be differentially influenced by GDNF.
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Affiliation(s)
- F Carlomagno
- Centro di Endocrinologia ed Oncologia Sperimentale del CNR, Dipartimento de Biologia e Patologia Cellulare e Molecolare, Facoltá di Medicina e Chirurgia, Universitá di Napoli Federico II, Naples, Italy
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Yu T, Scully S, Yu Y, Fox GM, Jing S, Zhou R. Expression of GDNF family receptor components during development: implications in the mechanisms of interaction. J Neurosci 1998; 18:4684-96. [PMID: 9614243 PMCID: PMC6792690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Glial cell line-derived neurotrophic factor (GDNF) and a related factor, neurturin, promote survival of diverse groups of neurons. Both GDNF and neurturin signal via a two-component receptor complex that consists of a ligand-binding GDNF family receptor (GFRalpha-1 or GFRalpha-2) and the receptor protein tyrosine kinase Ret. Recently, a third receptor related to GFRalpha-1 and GFRalpha-2 has also been isolated and designated GFRalpha-3. Although much is known about the interaction among GDNF family factors, Ret, and the alpha-receptors in vitro, it remains unclear about their interactions in vivo. We show here by in situ hybridization that Ret and the alpha-receptors may be colocalized in the same tissues or expressed separately in projecting and target tissues, respectively, indicating that two distinct modes of interaction between Ret and the alpha-receptors exist in vivo. First, Ret may interact with the alpha-receptors expressed in the same cells (termed interaction "in cis") in many tissues and cell populations that respond to GDNF and/or neurturin, such as the substantia nigra, dorsal root ganglia, spinal cord motoneurons, kidney, and intestine. Second, Ret may interact with the alpha-receptors localized in the target neurons (termed interaction "in trans"). In addition, we present evidence in vitro that GFRalpha-1 mediates Ret activation by GDNF in trans. These observations suggest that there are multiple mechanisms regulating the interaction between Ret and the alpha-receptors that mediates the effects of GDNF family trophic factors on the survival and differentiation of cells and on neuron-target interactions in the nervous system.
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Affiliation(s)
- T Yu
- Laboratory for Cancer Research, Department of Chemical Biology, College of Pharmacy, Rutgers University, Piscataway, New Jersey 08855, USA
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48
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Chiariello M, Visconti R, Carlomagno F, Melillo RM, Bucci C, de Franciscis V, Fox GM, Jing S, Coso OA, Gutkind JS, Fusco A, Santoro M. Signalling of the Ret receptor tyrosine kinase through the c-Jun NH2-terminal protein kinases (JNKS): evidence for a divergence of the ERKs and JNKs pathways induced by Ret. Oncogene 1998; 16:2435-45. [PMID: 9627110 DOI: 10.1038/sj.onc.1201778] [Citation(s) in RCA: 86] [Impact Index Per Article: 3.3] [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: 02/07/2023]
Abstract
The RET proto-oncogene encodes a functional receptor tyrosine kinase (Ret) for the Glial cell line Derived Neurotrophic Factor (GDNF). RET is involved in several neoplastic and non-neoplastic human diseases. Oncogenic activation of RET is detected in human papillary thyroid tumours and in multiple endocrine neoplasia type 2 syndromes. Inactivating mutations of RET have been associated to the congenital megacolon, i.e. Hirschprung's disease. In order to identify pathways that are relevant for Ret signalling to the nucleus, we have investigated its ability to induce the c-Jun NH2-terminal protein kinases (JNK). Here we show that triggering the endogenous Ret, expressed in PC12 cells, induces JNK activity; moreover, Ret is able to activate JNK either when transiently transfected in COS-1 cells or when stably expressed in NIH3T3 fibroblasts or in PC Cl 3 epithelial thyroid cells. JNK activation is dependent on the Ret kinase function, as a kinase-deficient RET mutant, associated with Hirschsprung's disease, fails to activate JNK. The pathway leading to the activation of JNK by RET is clearly divergent from that leading to the activation of ERK: substitution of the tyrosine 1062 of Ret, the Shc binding site, for phenylalanine abrogates ERK but not JNK activation. Experiments conducted with dominant negative mutants or with negative regulators demonstrate that JNK activation by Ret is mediated by Rho/Rac related small GTPases and, particularly, by Cdc42.
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Affiliation(s)
- M Chiariello
- Centro di Endocrinologia ed Oncologia Sperimentale del CNR, Dipartimento di Biologia e Patologia Cellulare e Molecolare, Facoltà di Medicina e Chirurgia, Università di Napoli Federico II, Naples, Italy
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Shefelbine SE, Khorana S, Schultz PN, Huang E, Thobe N, Hu ZJ, Fox GM, Jing S, Cote GJ, Gagel RF. Mutational analysis of the GDNF/RET-GDNFR alpha signaling complex in a kindred with vesicoureteral reflux. Hum Genet 1998; 102:474-8. [PMID: 9600247 DOI: 10.1007/s004390050724] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [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: 02/07/2023]
Abstract
Glial cell line-derived neurotrophic factor (GDNF) mediates signaling across the cell membrane by interaction with the RET-GDNFR alpha receptor complex. We identified a family in which one member had medullary thyroid carcinoma (MTC) and four members had vesicoureteral reflux (VUR). Knowledge that mutations in the RET proto-oncogene cause MTC and studies documenting genitourinary abnormalities in RET or GDNF knockout mice led us to examine the GDNF/RET-GDNFR alpha signaling complex in this family. RET and GDNF were excluded as the causative VUR gene by haplotype and sequence analysis. The GDNFR alpha gene was mapped to chromosome 10q25-26 by radiation hybrid techniques and was eliminated as the causative gene by haplotype analysis and sequencing of cDNA from an obligate carrier. Sequencing identified a 15-nucleotide deletion in GDNFR alpha mRNA, which was found to code for a single exon; analysis of several cell types revealed an identical mRNA form, indicating that this variant is a product of alternative RNA processing. We conclude that GDNFR alpha maps to 10q25-26 and that its RNA transcript is alternatively processed. Mutation abnormalities in the GDNF/RET-GDNFR alpha signaling system do not cause VUR in this family.
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Affiliation(s)
- S E Shefelbine
- Section of Endocrine Neoplasia and Hormonal Disorders, The University of Texas M.D. Anderson Cancer Center, Houston 77030, USA
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Angrist M, Jing S, Bolk S, Bentley K, Nallasamy S, Halushka M, Fox GM, Chakravarti A. Human GFRA1: cloning, mapping, genomic structure, and evaluation as a candidate gene for Hirschsprung disease susceptibility. Genomics 1998; 48:354-62. [PMID: 9545641 DOI: 10.1006/geno.1997.5191] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Congenital aganglionic megacolon, commonly known as Hirschsprung disease (HSCR), is the most frequent cause of congenital bowel obstruction. Germline mutations in the RET receptor tyrosine kinase have been shown to cause HSCR. Knockout mice for RET and for its ligand, glial cell line-derived neurotrophic factor (GDNF), exhibit both complete intestinal aganglionosis and renal defects. Recently, GDNF and GFRA1 (GDNF family receptor, also known as GDNFR-alpha), its GPI-linked coreceptor, were demonstrated to be components of a functional ligand for RET. Moreover, GDNF has been implicated in rare cases of HSCR. We have mapped GFRA1 to human chromosome 10q25, isolated human and mouse genomic clones, determined the gene's intron-exon boundaries, isolated a highly polymorphic microsatellite marker adjacent to exon 7, and scanned for GFRA1 mutations in a large panel of HSCR patients. No evidence of linkage was detected in HSCR kindreds, and no sequence variants were found to be in significant excess in patients. These data suggest that GFRA1'S role in enteric neurogenesis in humans remains to be elucidated and that RET signaling in the gut may take place via alternate pathways, such as the recently described GDNF-related molecule neurturin and its GFRA1-like coreceptor, GFRA2.
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Affiliation(s)
- M Angrist
- Department of Genetics, Case Western Reserve University, Cleveland, Ohio 44106-4955, USA
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