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Cao Q, Zhao M, Su Y, Liu S, Lin Y, Da H, Yue C, Liu Y, Jing D, Zhao Q, Liu N, Du J, Zuo Z, Fu Y, Chen A, Birnbaumer L, Yang Y, Dai B, Gao X. Chronic Stress Dampens Lactobacillus Johnsonii-Mediated Tumor Suppression to Enhance Colorectal Cancer Progression. Cancer Res 2024; 84:771-784. [PMID: 38190716 DOI: 10.1158/0008-5472.can-22-3705] [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] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 09/30/2023] [Accepted: 01/04/2024] [Indexed: 01/10/2024]
Abstract
Colorectal cancer development and outcome are impacted by modifiable risk factors, including psychologic stress. The gut microbiota has also been shown to be linked to psychologic factors. Here, we found a marked deteriorative effect of chronic stress in multiple colorectal cancer models, including chemically induced (AOM/DSS), genetically engineered (APCmin/+), and xenograft tumor mouse models. RNA sequencing data from colon tissues revealed that expression of stemness-related genes was upregulated in the stressed colorectal cancer group by activated β-catenin signaling, which was further confirmed by results from ex vivo organoid analyses as well as in vitro and in vivo cell tumorigenicity assays. 16S rRNA sequencing of the gut microbiota showed that chronic stress disrupted gut microbes, and antibiotic treatment and fecal microbiota transplantation abolished the stimulatory effects of chronic stress on colorectal cancer progression. Stressed colorectal cancer mice displayed a significant decrease in Lactobacillus johnsonii (L. johnsonii) abundance, which was inversely correlated with tumor load. Moreover, protocatechuic acid (PCA) was identified as a beneficial metabolite produced by L. johnsonii based on metabolome sequencing and LC/MS-MS analysis. Replenishment of L. johnsonii or PCA blocked chronic stress-induced colorectal cancer progression by decreasing β-catenin expression. Furthermore, PCA activated the cGMP pathway, and the cGMP agonist sildenafil abolished the effects of chronic stress on colorectal cancer. Altogether, these data identify that stress impacts the gut microbiome to support colorectal cancer progression. SIGNIFICANCE Chronic stress stimulates cancer stemness by reducing the intestinal abundance of L. johnsonii and its metabolite PCA to enhance β-catenin signaling, forming a basis for potential strategies to circumvent stress-induced cancer aggressiveness. See related commentary by McCollum and Shah, p. 645.
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Affiliation(s)
- Qiuhua Cao
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, P.R. China
- Vaccine Center, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, P.R. China
| | - Mingrui Zhao
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, P.R. China
| | - Yali Su
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, P.R. China
| | - Siliang Liu
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, P.R. China
| | - Yanting Lin
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, P.R. China
| | - Huijuan Da
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, P.R. China
| | - Chongxiu Yue
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, P.R. China
| | - Yiming Liu
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, P.R. China
| | - Dongquan Jing
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, P.R. China
| | - Qixiang Zhao
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, P.R. China
| | - Ning Liu
- Department of Pharmacology, College of Pharmacy, Ningxia Medical University, Yinchuan, P.R. China
| | - Juan Du
- Department of Pharmacology, College of Pharmacy, Ningxia Medical University, Yinchuan, P.R. China
| | - Zhanjie Zuo
- Thoracic Cancer Treatment Center, Armed Police Beijing Corps Hospital, Beijing, P.R. China
| | - Yao Fu
- Department of Pathology, Drum Tower Hospital, Medical School of Nanjing University, Nanjing, P.R. China
| | - Anqi Chen
- Faculty of Chinese Medicine, Macau University of Science and Technology, Macau, P.R. China
| | - Lutz Birnbaumer
- Laboratory of Signal Transduction, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina
- Institute of Biomedical Research (BIOMED), Catholic University of Argentina, Buenos Aires, Argentina
| | - Yong Yang
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, P.R. China
- School of Pharmacy, Xuzhou Medical University, Xuzhou, P.R. China
| | - Beiying Dai
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, P.R. China
| | - Xinghua Gao
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, P.R. China
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2
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Lin Y, Liu Y, Gao Z, Jing D, Bi R, Cui X, Cao Q, Zhao Q, Gao R, Su Y, Liu S, Zhao M, Yang Y, Chen A, Dai B, Gao X. Beta-adrenergic receptor blocker propranolol triggers anti-tumor immunity and enhances irinotecan therapy in mice colorectal cancer. Eur J Pharmacol 2023; 949:175718. [PMID: 37054937 DOI: 10.1016/j.ejphar.2023.175718] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 03/30/2023] [Accepted: 04/11/2023] [Indexed: 04/15/2023]
Abstract
Colorectal cancer (CRC) stands as the second leading cause of cancer-related deaths worldwide with limited available medicines. While drug repurposing comes as a promising strategy for cancer treatment, we discovered that propranolol (Prop), a non-selective β1 and β2 adrenergic receptor blocker, significantly inhibited the development of subcutaneous CT26 CRC and AOM/DSS-induced CRC models. The RNA-seq analysis highlighted the activated immune pathways after Prop treatment, with GO analysis enriched in T-cell differentiation, leukocyte-mediated immunity, regulation of leukocyte-mediated cytotoxicity, and interferon-gamma production. Routine analyses of blood revealed a decrease in neutrophil to lymphocyte ratio, a biomarker of systemic inflammation, and a prognostic indicator in the Prop-treated groups in both CRC models. Analysis of the tumor-infiltrating immune cells exhibited that Prop regressed the exhaustion of CD4+ and CD8+ T cells in the CT26-derived graft models, which was further corroborated in the AOM/DSS-induced models. Furthermore, bioinformatic analysis fitted well with the experimental data, showing that β2 adrenergic receptor (ADRB2) was positively correlated with T-cell exhaustion signature in various tumors. The in vitro experiment showed no direct effect of Prop on CT26 cell viability, while T cells were activated with significantly-upregulated production of IFN-γ and Granzyme B. Consistently, Prop was unable to restrain CT26 tumor growth in nude mice. At last, the combination of Prop and the chemotherapeutic drug Irinotecan acted out the strongest inhibition in CT26 tumor progress. Collectively, we repurpose Prop as a promising and economical therapeutic drug for CRC treatment and highlight T-cell as its target.
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Affiliation(s)
- Yanting Lin
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu, 211198, PR China
| | - Yiming Liu
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu, 211198, PR China
| | - Zhenhua Gao
- Shandong University Cancer Center, Jinan, Shandong, China; Department of Radiation Oncology, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Dongquan Jing
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu, 211198, PR China
| | - Ran Bi
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu, 211198, PR China
| | - Xinmeng Cui
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu, 211198, PR China
| | - Qiuhua Cao
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu, 211198, PR China
| | - Qixiang Zhao
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu, 211198, PR China
| | - Rui Gao
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu, 211198, PR China
| | - Yali Su
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu, 211198, PR China
| | - Siliang Liu
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu, 211198, PR China
| | - Mingrui Zhao
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu, 211198, PR China
| | - Yong Yang
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu, 211198, PR China
| | - Anqi Chen
- Faculty of Chinese Medicine, Macau University of Science and Technology, China
| | - Beiying Dai
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu, 211198, PR China.
| | - Xinghua Gao
- Center for New Drug Safety Evaluation and Research, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, Jiangsu, 211198, PR China.
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Xie X, Wang J, Wang K, Li C, Zhang S, Jing D, Xu C, Wang X, Zhao H, Feng J. Axin2 +-Mesenchymal PDL Cells, Instead of K14 + Epithelial Cells, Play a Key Role in Rapid Cementum Growth. J Dent Res 2019; 98:1262-1270. [PMID: 31454276 PMCID: PMC6755721 DOI: 10.1177/0022034519871021] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
To date, attempts to regenerate functional periodontal tissues (including cementum) are largely unsuccessful due to a lack of full understanding about the cellular origin (epithelial or mesenchymal cells) essential for root cementum growth. To address this issue, we first identified a rapid cementum growth window from the ages of postnatal day 28 (P28) to P56. Next, we showed that expression patterns of Axin2 and β-catenin within cementum-forming periodontal ligament (PDL) cells are negatively associated with rapid cementum growth. Furthermore, cell lineage tracing studies revealed that the Axin2+-mesenchymal PDL cells and their progeny rapidly expand and directly contribute to postnatal acellular and cellular cementum growth. In contrast, the number of K14+ epithelial cells, which were initially active at early stages of development, was reduced during rapid cementum formation from P28 to P56. The in vivo cell ablation of these Axin2+ cells using Axin2CreERT2/+; R26RDTA/+ mice led to severe cementum hypoplasia, whereas constitutive activation of β-catenin in the Axin2+ cells resulted in an acceleration in cellular cementogenesis plus a transition from acellular cementum to cellular cementum. Thus, we conclude that Axin2+-mesenchymal PDL cells, instead of K14+ epithelial cells, significantly contribute to rapid cementum growth.
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Affiliation(s)
- X. Xie
- State Key Laboratory of Oral Diseases,
National Clinical Research Center for Oral Diseases, Department of Periodontics,
West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of Biomedical Sciences, Texas
A&M University College of Dentistry, Dallas, TX, USA
| | - J. Wang
- State Key Laboratory of Oral Diseases,
National Clinical Research Center for Oral Diseases, Department of Periodontics,
West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of Biomedical Sciences, Texas
A&M University College of Dentistry, Dallas, TX, USA
| | - K. Wang
- Department of Biomedical Sciences, Texas
A&M University College of Dentistry, Dallas, TX, USA
| | - C. Li
- Department of Biomedical Sciences, Texas
A&M University College of Dentistry, Dallas, TX, USA
- Department of Oral Implantology, School
and Hospital of Stomatology, Tongji University, Shanghai Engineering Research Center
of Tooth Restoration and Regeneration, Shanghai, China
| | - S. Zhang
- State Key Laboratory of Oral Diseases,
National Clinical Research Center for Oral Diseases, Department of Periodontics,
West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of Biomedical Sciences, Texas
A&M University College of Dentistry, Dallas, TX, USA
| | - D. Jing
- State Key Laboratory of Oral Diseases,
National Clinical Research Center for Oral Diseases, Department of Periodontics,
West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of Biomedical Sciences, Texas
A&M University College of Dentistry, Dallas, TX, USA
| | - C. Xu
- State Key Laboratory of Oral Diseases,
National Clinical Research Center for Oral Diseases, Department of Periodontics,
West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of Biomedical Sciences, Texas
A&M University College of Dentistry, Dallas, TX, USA
| | - X. Wang
- Department of Biomedical Sciences, Texas
A&M University College of Dentistry, Dallas, TX, USA
| | - H. Zhao
- Department of Biomedical Sciences, Texas
A&M University College of Dentistry, Dallas, TX, USA
| | - J.Q. Feng
- Department of Biomedical Sciences, Texas
A&M University College of Dentistry, Dallas, TX, USA
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4
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Abstract
Opaqueness of animal tissue can be attributed mostly to light absorption and light scattering. In most noncleared tissue samples, confocal images can be acquired at no more than a 100-µm depth. Tissue-clearing techniques have emerged in recent years in the neuroscience field. Many tissue-clearing methods have been developed, and they all follow similar working principles. During the tissue-clearing process, chemical or physical treatments are applied to remove components blocking or scattering the light. Finally, samples are immersed in a designated clearing medium to achieve a uniform refractive index and to gain transparency. Once the transparency is reached, images can be acquired even at several millimeters of depth with high resolution. Tissue clearing has become an essential tool for neuroscientists to investigate the neural connectome or to analyze spatial information of various types of brain cells. Other than neural science research, tissue-clearing techniques also have applications for bone research. Several methods have been developed for clearing bones. Clearing treatment enables 3-dimensional imaging of bones without sectioning and provides important new insights that are difficult or impossible to acquire with conventional approaches. Application of tissue-clearing technique on dental research remains limited. This review will provide an overview of the recent literature related to the methods and application of various tissue-clearing methods. The following aspects will be covered: general principles for the tissue-clearing technique, current available methods for clearing bones and teeth, general principles of 3-dimensional imaging acquisition and data processing, applications of tissue clearing on studying biological processes within bones and teeth, and future directions for 3-dimensional imaging.
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Affiliation(s)
- D Jing
- 1 Department of Restorative Sciences, School of Dentistry, Texas A&M University, Dallas, TX, USA.,2 State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, P.R. China
| | - Y Yi
- 1 Department of Restorative Sciences, School of Dentistry, Texas A&M University, Dallas, TX, USA.,2 State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, P.R. China
| | - W Luo
- 1 Department of Restorative Sciences, School of Dentistry, Texas A&M University, Dallas, TX, USA
| | - S Zhang
- 2 State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, P.R. China
| | - Q Yuan
- 2 State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, P.R. China
| | - J Wang
- 2 State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, P.R. China
| | - E Lachika
- 3 Intelligent Imaging Innovations (3i), Denver, CO, USA
| | - Z Zhao
- 2 State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, P.R. China
| | - H Zhao
- 1 Department of Restorative Sciences, School of Dentistry, Texas A&M University, Dallas, TX, USA
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5
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Abstract
To explore the potential clinical anti-tumor roles of Bacillus subtilis fmbJ-derived fengycin on cell growth and apoptosis in colon cancer HT29 cell line.Fengycin was extracted from Bacillus subtilis fmbJ and detected using HPLC. The effects of different concentration of fengycin on colon cell HT29 cell activity at different time points were analyzed using MTT assay. ROS level in colon HT29 cells affected by fengycin was detected using DCFH-DA method, followed by measuring the effects of fengycin on HT29 cell apoptosis and cell cycle by flow cytometry. The effects of fengycin on Bax/Bcl-2, CDK4/cyclin D1, Caspase-6 and Caspase-3 expressions in HT29 cells were analyzed using western blot. Also, mRNA levels of Bax/Bcl-2 and CDK4/cyclin D1 in HT29 cells affected by fengycin were analyzed using qRT-PCR.Compared with controlss, 20 μg/mL of fengycin performed an inhibit role on HT29 cell growth of at 3 day (P<0.05), and high dose of fengycin showed more excellent effect on inhibiting HT29 cell growth with time increasing. Besides, fengycin could induce HT29 cell apoptosis and affect the cell cycle arrest at G1. ROS level in HT29 cells treated by fengycin was significantly increased compared with that in control group (P<0.05). Western blot analysis showed that after being treated with fengycin, Bax, Caspase-3, and Caspase-6 expressions were increased, however, Bcl-2, and CDK4/cyclin D1 expressions were decreased (P<0.05).Our study suggested that fengycin may play certain inhibit roles in the development and progression of colon cancer through involving in the cell apoptosis and cell cycle processes by targeting the Bax/Bcl-2 pathway.
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Cai J, Li W, Sun T, Li X, Luo E, Jing D. Pulsed electromagnetic fields preserve bone architecture and mechanical properties and stimulate porous implant osseointegration by promoting bone anabolism in type 1 diabetic rabbits. Osteoporos Int 2018. [PMID: 29523929 DOI: 10.1007/s00198-018-4392-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
UNLABELLED The effects of exogenous pulsed electromagnetic field (PEMF) stimulation on T1DM-associated osteopathy were investigated in alloxan-treated rabbits. We found that PEMF improved bone architecture, mechanical properties, and porous titanium (pTi) osseointegration by promoting bone anabolism through a canonical Wnt/β-catenin signaling-associated mechanism, and revealed the clinical potential of PEMF stimulation for the treatment of T1DM-associated bone complications. INTRODUCTION Type 1 diabetes mellitus (T1DM) is associated with deteriorated bone architecture and impaired osseous healing potential; nonetheless, effective methods for resisting T1DM-associated osteopenia/osteoporosis and promoting bone defect/fracture healing are still lacking. PEMF, as a safe and noninvasive method, have proven to be effective for promoting osteogenesis, whereas the potential effects of PEMF on T1DM osteopathy remain poorly understood. METHODS We herein investigated the effects of PEMF stimulation on bone architecture, mechanical properties, bone turnover, and its potential molecular mechanisms in alloxan-treated diabetic rabbits. We also developed novel nontoxic Ti2448 pTi implants with closer elastic modulus with natural bone and investigated the impacts of PEMF on pTi osseointegration for T1DM bone-defect repair. RESULTS The deteriorations of cancellous and cortical bone architecture and tissue-level mechanical strength were attenuated by 8-week PEMF stimulation. PEMF also promoted osseointegration and stimulated more adequate bone ingrowths into the pore spaces of pTi in T1DM long-bone defects. Moreover, T1DM-associated reduction of bone formation was significantly attenuated by PEMF, whereas PEMF exerted no impacts on bone resorption. We also found PEMF-induced activation of osteoblastogenesis-related Wnt/β-catenin signaling in T1DM skeletons, but PEMF did not alter osteoclastogenesis-associated RANKL/RANK signaling gene expression. CONCLUSION We reveal that PEMF improved bone architecture, mechanical properties, and pTi osseointegration by promoting bone anabolism through a canonical Wnt/β-catenin signaling-associated mechanism. This study enriches our basic knowledge for understanding skeletal sensitivity in response to external electromagnetic signals, and also opens new treatment alternatives for T1DM-associated osteopenia/osteoporosis and osseous defects in an easy and highly efficient manner.
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MESH Headings
- Animals
- Biomechanical Phenomena/physiology
- Bone Diseases, Metabolic/etiology
- Bone Diseases, Metabolic/physiopathology
- Bone Diseases, Metabolic/prevention & control
- Bone Remodeling/physiology
- Bone and Bones/metabolism
- Diabetes Mellitus, Experimental/complications
- Diabetes Mellitus, Experimental/metabolism
- Diabetes Mellitus, Experimental/physiopathology
- Diabetes Mellitus, Type 1/complications
- Diabetes Mellitus, Type 1/metabolism
- Diabetes Mellitus, Type 1/physiopathology
- Implants, Experimental
- Magnetic Field Therapy/methods
- Male
- Osseointegration/physiology
- Porosity
- Rabbits
- Titanium
- Wnt Signaling Pathway/physiology
- X-Ray Microtomography
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Affiliation(s)
- J Cai
- College of Basic Medicine, Shaanxi University of Chinese Medicine, Xi'an-Xianyang New Economic Zone, Xianyang, 712046, China.
- Department of Biomedical Engineering, Fourth Military Medical University, 17 West Changle Road, Xi'an, 710032, China.
| | - W Li
- Department of Biomedical Engineering, Fourth Military Medical University, 17 West Changle Road, Xi'an, 710032, China
| | - T Sun
- Department of Biomedical Engineering, Fourth Military Medical University, 17 West Changle Road, Xi'an, 710032, China
| | - X Li
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - E Luo
- Department of Biomedical Engineering, Fourth Military Medical University, 17 West Changle Road, Xi'an, 710032, China
| | - D Jing
- Department of Biomedical Engineering, Fourth Military Medical University, 17 West Changle Road, Xi'an, 710032, China.
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7
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Hatami M, Jing D, Yousif MA. Three-dimensional analysis of condensation nanofluid film on an inclined rotating disk by efficient analytical methods. Arab Journal of Basic and Applied Sciences 2018. [DOI: 10.1080/25765299.2018.1449415] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
Affiliation(s)
- M. Hatami
- Department of Mechanical Engineering, Esfarayen University of Technology, Esfarayen, Iran
- State Key Laboratory of Multiphase Flow in Power Engineering & International Research Center for Renewable Energy, Xi’an Jiaotong University, Xi’an, China
| | - D. Jing
- State Key Laboratory of Multiphase Flow in Power Engineering & International Research Center for Renewable Energy, Xi’an Jiaotong University, Xi’an, China
| | - Majeed A. Yousif
- Department of Mathematics, Faculty of Science, University of Zakho, Zakho, Iraq
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8
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Zhang J, Liao L, Zhu J, Wan X, Xie M, Zhang H, Zhang M, Lu L, Yang H, Jing D, Liu X, Yu S, Lu XL, Chen C, Shan Z, Wang M. Osteochondral Interface Stiffening in Mandibular Condylar Osteoarthritis. J Dent Res 2018; 97:563-570. [PMID: 29298566 DOI: 10.1177/0022034517748562] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Osteoarthritis (OA) of the temporomandibular joint (TMJ) is associated with dental biomechanics. A major change during OA progression is the ossification of the osteochondral interface. This study investigated the formation, radiological detectability, and mechanical property of the osteochondral interface at an early stage, the pathogenesis significance of which in OA progression is of clinical interest and remains elusive for the TMJ. Unilateral anterior crossbite (UAC) was performed on 6-wk-old rats as we previously reported. TMJs were harvested at 4, 12, and 20 wk. The progression of TMJ OA was evaluated using a modified Osteoarthritis Research Society International (OARSI) score system. Osteochondral interface was investigated by quantifying the thickness via von Kossa staining of histological slices and in vivo calcium deposition by calcein injection. Tissue ossification was imaged by micro-computed tomography (CT). Mechanical properties were measured at nanoscale using dynamic indentation. Time-dependent TMJ cartilage lesions were elicited by UAC treatment. Geometric change of the condyle head and increased value of the OARSI score were evident in UAC TMJs. At the osteochondral interface, there was not only enhanced deep-zone cartilage calcification but also calcium deposition at the osseous boundary. The thickness, density, and stiffness of the osteochondral interface were all significantly increased. The enhanced ossification of the osteochondral interface is a joint outcome of the aberrant deeper cartilage calcification at the superior region and promoted formation of subchondral cortical bone at the inferior region. The micro-CT detectable ossification from an early stage thus is of diagnostic significance. Although the environment of the cartilage and subchondral bone could be changed due to the stiffness of the interface, whether or not the stiffened interface would accelerate OA progress remains to be confirmed. With that evidence, the osteochondral interface could be a new diagnostic and therapeutic target of the mechanically initiated OA in the TMJ.
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Affiliation(s)
- J Zhang
- 1 State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, Xi'an, China
| | - L Liao
- 1 State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, Xi'an, China.,2 Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, Department of Implant Dentistry, College of Stomatology, Xi'an Jiaotong University, Xi'an, China
| | - J Zhu
- 3 Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano) & Hysitron Applied Research Center in China (HARCC), State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, China
| | - X Wan
- 1 State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, Xi'an, China
| | - M Xie
- 1 State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, Xi'an, China
| | - H Zhang
- 1 State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, Xi'an, China
| | - M Zhang
- 1 State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, Xi'an, China
| | - L Lu
- 1 State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, Xi'an, China
| | - H Yang
- 1 State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, Xi'an, China
| | - D Jing
- 4 School of Biomedical Engineering, the Fourth Military Medical University, Xi'an, China
| | - X Liu
- 1 State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, Xi'an, China
| | - S Yu
- 1 State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, Xi'an, China
| | - X L Lu
- 5 Department of Mechanical Engineering, University of Delaware, Newark, DE, USA
| | - C Chen
- 6 Department of Health Statistics, the Fourth Military Medical University, Xi'an, China
| | - Z Shan
- 3 Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano) & Hysitron Applied Research Center in China (HARCC), State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, China
| | - M Wang
- 1 State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, the Fourth Military Medical University, Xi'an, China
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Hatami M, Mosayebidorcheh S, Jing D. Thermal performance evaluation of alumina-water nanofluid in an inclined direct absorption solar collector (IDASC) using numerical method. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.02.045] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [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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10
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Chen H, Ni Z, Jing D, He L, Qiao L, Liu L, Wei X, Jiang M, Tang S, Xu H. Novel stent in the palliation of malignant esophageal strictures: a retrospective study. Dis Esophagus 2017; 30:1-5. [PMID: 26727310 DOI: 10.1111/dote.12446] [Citation(s) in RCA: 3] [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] [Indexed: 12/11/2022]
Abstract
The placement of metal stents is often used as a palliative treatment for malignant esophageal stenosis. We designed a novel stent that has been used clinically since 2011, and we therefore performed a retrospective study to compare the therapeutic effects of this novel metal stent to a conventional partially covered metal stent in patients with malignant esophageal strictures. The records of 201 consecutive patients who underwent placement of either the conventional partially covered metal stents (Group A, n = 92) or the new metal stents (Group B, n = 109) in the Endoscopy Center of General Hospital of Chengdu Military Command from October 2008 to March 2013 were reviewed. The median dysphagia score significantly improved in both groups 1 week following stent placement (P < 0.001). No significant differences were observed in success rate (P = 0.910) or the complication rate (P = 0.426) between groups. Six months after stent placement, recurrent dysphagia due to stent migration, tissue ingrowth or overgrowth or food obstruction occurred in 45% and 29% of patients in the conventional stent and new stent groups, respectively. The results of this retrospective study indicate that the new modified self-expandable metal stents (SEMS) is at least as safe and effective as the conventional partially covered SEMS in treatment of malignant esophageal strictures.
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Affiliation(s)
- H Chen
- Department of Digestion, General Hospital of Chengdu Military Command, Chengdu, Sichuan Province, China
| | - Z Ni
- Department of Digestion, General Hospital of Chengdu Military Command, Chengdu, Sichuan Province, China
| | - D Jing
- Department of Biomedical Engineering, Fourth Military Medical University, Xi'an, China
| | - L He
- Department of Anaesthesiology, Children's Hospital of Fudan University, Shanghai, China
| | - L Qiao
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei, Anhui, PRC
| | - L Liu
- Xuzhou Medical College Graduate Academy, Xuzhou, China
| | - X Wei
- Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - M Jiang
- Department of Basic Medicine, Institute of Immunology, Third Military Medical University of PLA, Chongqing, China
| | - S Tang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - H Xu
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, New York, USA
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Khazayinejad M, Hatami M, Jing D, Khaki M, Domairry G. Boundary layer flow analysis of a nanofluid past a porous moving semi-infinite flat plate by optimal collocation method. POWDER TECHNOL 2016. [DOI: 10.1016/j.powtec.2016.05.053] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Ghasemi SE, Hatami M, Jing D, Ganji D. Nanoparticles effects on MHD fluid flow over a stretching sheet with solar radiation: A numerical study. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.03.065] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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13
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Hatami M, Sahebi S, Majidian A, Sheikholeslami M, Jing D, Domairry G. Numerical analysis of nanofluid flow conveying nanoparticles through expanding and contracting gaps between permeable walls. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.10.040] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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14
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Murrell J, Kehoe D, Aysola M, Jing D, Punreddy S, Verma A, Mann K, Lawson T, Rook M. Single use expansion and harvest of adult stem cells supports large scale manufacturing. Cytotherapy 2014. [DOI: 10.1016/j.jcyt.2014.01.270] [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: 11/30/2022]
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15
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Jing D, Wang J, Zhang M, Wang Y, Xie C. Nucleation Kinetics and Growth Model of Penicillin Sulfoxide in Butyl Acetate. Chem Eng Technol 2013. [DOI: 10.1002/ceat.201200731] [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: 11/11/2022]
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16
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Magariños AM, Li CJ, Gal Toth J, Bath KG, Jing D, Lee FS, McEwen BS. Effect of brain-derived neurotrophic factor haploinsufficiency on stress-induced remodeling of hippocampal neurons. Hippocampus 2012; 21:253-64. [PMID: 20095008 DOI: 10.1002/hipo.20744] [Citation(s) in RCA: 187] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Chronic restraint stress (CRS) induces the remodeling (i.e., retraction and simplification) of the apical dendrites of hippocampal CA3 pyramidal neurons in rats, suggesting that intrahippocampal connectivity can be affected by a prolonged stressful challenge. Since the structural maintenance of neuronal dendritic arborizations and synaptic connectivity requires neurotrophic support, we investigated the potential role of brain derived neurotrophic factor (BDNF), a neurotrophin enriched in the hippocampus and released from neurons in an activity-dependent manner, as a mediator of the stress-induced dendritic remodeling. The analysis of Golgi-impregnated hippocampal sections revealed that wild type (WT) C57BL/6 male mice showed a similar CA3 apical dendritic remodeling in response to three weeks of CRS to that previously described for rats. Haploinsufficient BDNF mice (BDNF(±) ) did not show such remodeling, but, even without CRS, they presented shorter and simplified CA3 apical dendritic arbors, like those observed in stressed WT mice. Furthermore, unstressed BDNF(±) mice showed a significant decrease in total hippocampal volume. The dendritic arborization of CA1 pyramidal neurons was not affected by CRS or genotype. However, only in WT mice, CRS induced changes in the density of dendritic spine shape subtypes in both CA1 and CA3 apical dendrites. These results suggest a complex role of BDNF in maintaining the dendritic and spine morphology of hippocampal neurons and the associated volume of the hippocampal formation. The inability of CRS to modify the dendritic structure of CA3 pyramidal neurons in BDNF(±) mice suggests an indirect, perhaps permissive, role of BDNF in mediating hippocampal dendritic remodeling.
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Affiliation(s)
- A M Magariños
- Harold and Margaret Milliken Hatch Laboratory of Neuroendocrinology, Rockefeller University, New York, USA.
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Jing D, Cai J, Shen G, Huang J, Li F, Li J, Lu L, Luo E, Xu Q. The preventive effects of pulsed electromagnetic fields on diabetic bone loss in streptozotocin-treated rats. Osteoporos Int 2011; 22:1885-95. [PMID: 20976595 DOI: 10.1007/s00198-010-1447-3] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [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] [Received: 04/14/2010] [Accepted: 09/28/2010] [Indexed: 01/26/2023]
Abstract
UNLABELLED The present study was the first report demonstrating that pulsed electromagnetic field (PEMF) could partially prevent bone strength and architecture deterioration and improve the impaired bone formation in streptozotocin-induced diabetic rats. The findings indicated that PEMF might become a potential additive method for inhibiting diabetic osteopenia or osteoporosis. INTRODUCTION Diabetes mellitus (DM) can cause various musculoskeletal abnormalities. Optimal therapeutic methods for diabetic bone complication are still lacking. It is essential to develop more effective and safe therapeutic methods for diabetic bone disorders. Pulsed electromagnetic field (PEMF) as an alternative noninvasive method has proven to be effective for treating fracture healing and osteoporosis in non-diabetic conditions. However, the issue about the therapeutic effects of PEMF on diabetic bone complication has not been previously investigated. METHODS We herein systematically evaluated the preventive effects of PEMF on diabetic bone loss in streptozotocin-treated rats. Two similar experiments were conducted. In each experiment, 16 diabetic and eight non-diabetic rats were equally assigned to the control, DM, and DM + PEMF group. DM + PEMF group was subjected to daily 8-h PEMF exposure for 8 weeks. RESULTS In experiment 1, three-point bending test suggested that PEMF improved the biomechanical quality of diabetic bone tissues, evidenced by increased maximum load, stiffness, and energy absorption. Microcomputed tomography analysis demonstrated that DM-induced bone architecture deterioration was partially reversed by PEMF, evidenced by increased Tb.N, Tb.Th, BV/TV, and Conn.D and reduced Tb.Sp and SMI. Serum OC analysis indicated that PEMF partially prevented DM-induced decrease in bone formation. In experiment 2, no significant difference in the bone resorption marker TRACP5b was observed. These biochemical findings were further supported by the dynamic bone histomorphometric parameters BFR/BS and Oc.N/BS. CONCLUSIONS The results demonstrated that PEMF could partially prevent DM-induced bone strength and architecture deterioration and improve the impaired bone formation. PEMF might become a potential additive method for inhibiting diabetic osteoporosis.
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Affiliation(s)
- D Jing
- Faculty of Biomedical Engineering, Fourth Military Medical University, 17 West Changle Road, Xi'an 710032, China
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18
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Jing D, Alakel N, Bornhäuser M, Ehninger G, Ordemann R. SDF-1/CXCR4 blockade to mobilize hematopoietic progenitor cells from the placenta. Bone Marrow Transplant 2010; 45:1661-2. [PMID: 20173795 DOI: 10.1038/bmt.2010.22] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Fierro F, Illmer T, Jing D, Schleyer E, Ehninger G, Boxberger S, Bornhäuser M. Inhibition of platelet-derived growth factor receptorbeta by imatinib mesylate suppresses proliferation and alters differentiation of human mesenchymal stem cells in vitro. Cell Prolif 2007; 40:355-66. [PMID: 17531080 PMCID: PMC6496321 DOI: 10.1111/j.1365-2184.2007.00438.x] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
OBJECTIVES Recent data show that Imatinib mesylate (IM) also affects haematopoietic stem cells (HSC), T lymphocytes and dendritic cells that do not harbour constitutively active tyrosine kinases. MATERIALS AND METHODS We evaluated possible effects of IM on human bone marrow-derived mesenchymal stem cells (MSC) in vitro. RESULTS Screening the activity of 42 receptor tyrosine kinases revealed an exclusive inhibition of platelet-derived growth factor receptorbeta (PDGFRbeta). Analysis of downstream targets of PDGFRbeta demonstrated IM-mediated reduction of Akt and Erk1/2 phosphorylation. Culture of MSC with IM led to the reversible development of perinuclear multi-vesicular bodies. The proliferation and clonogenicity of MSC were significantly reduced compared to control cultures. IM favoured adipogenic differentiation of MSC whereas osteogenesis was suppressed. The functional deficits described led to a 50% reduction in the support of clonogenic haematopoietic stem cells, cultured for 1 month on a monolayer of MSC with IM. CONCLUSION In summary, inhibition of PDGFRbeta and downstream Akt and Erk signalling by IM has a significant impact on proliferation and differentiation of human MSC in vitro.
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Affiliation(s)
- F Fierro
- Medizinische Klinik und Poliklinik I, University Hospital Carl Gustav Carus, Dresden, Germany
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Li C, Deng D, Jing D, Love W, Kratzmeier M, Bek F, Tian X, Romeo R, Mueller O, Superko R. Th-P17:429 A rapid microfluidic assay for HDL-C and HDL subclass distribution. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)82387-1] [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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21
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Li C, Deng D, Jing D, Romeo R, Kratzmeier M, Bek F, Tian X, Mueller O, Schreiber D, Sussman H. Th-P17:430 Coronary risk assessment using a rapid microfluidic lipoprotein assay. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)82388-3] [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: 10/23/2022]
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22
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Yan L, Jing D. Clinical Features of Polycystic Ovarian Syndrome (PCOS) in China. Fertil Steril 2005. [DOI: 10.1016/j.fertnstert.2005.07.413] [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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23
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Huang H, Jing D, Li Z, Zhou S, Xiao S, Ma D, Zhang R. Analysis of lectin receptors in normal nasal mucosa, nasal polyp, inverted papilloma and papillary adenocarcinoma. J Laryngol Otol 2004; 107:600-2. [PMID: 15125275 DOI: 10.1017/s0022215100123813] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
In order to investigate the changes in glycoprotein structure in the process of cellular differentiation of the nasal mucosa, formalin-fixed, paraffin-embedded biopsy specimens of normal nasal mucosae, nasal polyps, inverted papillomas and papillary adenocarcinomas were analysed by the Avidin Biotin-Peroxidase Complex technique for the demonstration of peanut agglutinin (PNA) receptors, concanavalin ensifomis agglutinin (ConA) receptors, ulex europeaus agglutinin (UEA-I) receptors, wheat germ agglutinin (WGA) receptors, carcino-embryonic antigen (CEA) and keratin. The quantity and distribution of PNA receptors, ConA receptors, UEA-I receptors and CEA were different, in relation to the varying pathological changes. The results suggest that the glycoprotein structure in the cells of the nasal mucosa will change following their differentiation and malignant transformation, which may be helpful in establishing the diagnosis.
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Affiliation(s)
- H Huang
- Department of Otolaryngology, Changhai Hospital, Shanghai, China
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Fan J, Zhong L, Wang G, Wu X, Li M, Jing D, Zhang P. The role of Kupffer cells in non-alcoholic steatohepatitis of rats chronically fed with high-fat diet. Zhonghua Gan Zang Bing Za Zhi 2001; 9:16-8. [PMID: 11242127] [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: 02/19/2023]
Abstract
OBJECTIVE To explore the role of Kupffer cells in non-alcoholic steatohepatitis (NASH) by means of rat model. METHODS Nineteen male SD rats were randomized into model group (n=10) and normal group (n=9), with a high-fat diet and standard diet for 12 weeks, respectively. Routine histologic features of hepatic section were observed by HE staining. The number and shape of Kupffer cells in the liver were detected by immunohistochemistry and penetrated electron microscope, respectively. RESULTS All rats of model group developed NASH, which was characterized by obesity and hyperlipidemia. Histopathological examination showed hepatocellular macrovesicular steatosis, lobular inflammatory cell infiltration and necrosis. Compared with normal group, the count of Kupffer cells in the liver was largely increased, and the Kupffer cells in the model group were activated to some extent. Furthermore, these changes of Kupffer cells were in accordance with the degree of steatosis, inflammation and necrosis in the liver of the model group. CONCLUSION The number and activity of Kupffer cells are increased significantly in NASH induced by high-fat diet, and Kupffer cells might be involved in the pathogenesis of steatohepatitis.
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Affiliation(s)
- J Fan
- Department of Digestive Diseases, Shanghai First People's Hospital, Shanghai 200080, China
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Korndörfer IP, Salerno J, Jing D, Matthews BW. Crystallization and preliminary X-ray analysis of a bacteriophage T4 primase fragment. Acta Crystallogr D Biol Crystallogr 2000; 56:95-7. [PMID: 10666640 DOI: 10.1107/s0907444999014225] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The primase from bacteriophage T4 is a single-stranded DNA-dependent RNA polymerase that is one of the seven proteins that constitute the DNA-replication machinery of bacteriophage T4. In an attempt to crystallize the protein, a number of variants were generated. One such construct, which includes the C-terminal region (residues 196-340), gave four different crystal forms which diffract in the 3. 5-6.0 A resolution range.
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Affiliation(s)
- I P Korndörfer
- Institute of Molecular Biology, Howard Hughes Medical Institute and Department of Physics, 1229 University of Oregon, Eugene, Oregon 97403-1229, USA
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Gu L, Yang Z, Jing D, Wang S. [The influential factors in using cadmium reduction method for measurement of the stable products of NO--nitrates and nitrites]. Hua Xi Yi Ke Da Xue Xue Bao 1999; 30:340-2. [PMID: 12212304] [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: 02/26/2023]
Abstract
To establish an efficient assay method for detecting nitric oxide indirectly, we compared the effects of cadmium filing, 5 mmol/L and 80 mmol/L copperized cadmium filing on the measurement of nitrates and nitrites (the stable products of NO) using the cadmium reduction method. The results demonstrated that cadmium filing was the most efficient cadmium preparations (P < 0.001). It's mean reduction rate was 96%, and it showed stronger reduction effectiveness in deproteinization cell culture media. The results indicated that cadmium filing has strong anti-interference capacity in biological fluid. We recommend the cadmium filing reduction method because it is simple, practical, inexpensive, highly efficient and can be performed in ordinary laboratories.
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Affiliation(s)
- L Gu
- Department of Pathophysiology, School of Basic Medical Sciences, WCUMS, Chengdu 610041
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Feng JQ, Luan X, Wallace J, Jing D, Ohshima T, Kulkarni AB, D'Souza RN, Kozak CA, MacDougall M. Genomic organization, chromosomal mapping, and promoter analysis of the mouse dentin sialophosphoprotein (Dspp) gene, which codes for both dentin sialoprotein and dentin phosphoprotein. J Biol Chem 1998; 273:9457-64. [PMID: 9545272 DOI: 10.1074/jbc.273.16.9457] [Citation(s) in RCA: 173] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Our laboratory has reported that two major noncollagenous dentin proteins, dentin sialoprotein and dentin phosphoprotein, are specific cleavage products of a larger precursor protein termed dentin sialophosphoprotein (MacDougall, M., Simmons, D., Luan, X., Nydegger, J., Feng, J. Q., and Gu, T. T. (1997) J. Biol. Chem. 272:835-842). To confirm our single gene hypothesis and initiate in vitro promoter studies, we have characterized the structural organization of the mouse dentin sialophosphoprotein gene. This gene has a transcription unit of approximately 9.4 kilobase pairs and is organized into 5 exons and 4 introns. Exon 1 contains a noncoding 5' sequence, and exon 2 contains the transcriptional start site, signal peptide, and first two amino acids of the NH2 terminus. Exons 3 and 4 contain coding information for 29 and 314 amino acids, respectively. The remainder of the coding information and the untranslated 3' region are contained in exon 5. Chromosomal mapping localized the gene to mouse chromosome 5q21 in close proximity to other dentin/bone matrix genes. Computer analysis of the promoter proximal 1.6-kilobase pair sequence revealed a number of potentially important cis-regulatory sequences; these include the recognition elements of AP-1, AP-2, Msx-1, serum response elements, SP-1, and TCF-1. In vitro studies showed that the DSPP promoter is active in an odontoblast cell line, MO6-G3, with basal activity mapped to -95 bp. Two potential enhancer and suppresser elements were identified in the regions between -1447 and -791 bp and -791 and -95 bp, respectively. The structural organization of the dentin sialophosphoprotein gene confirms our finding that both dentin sialoprotein and dentin phosphoprotein are encoded by a single gene with a continuous open reading frame.
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Affiliation(s)
- J Q Feng
- University of Texas Health Science Center at San Antonio, Dental School, San Antonio, Texas 78284-7888, USA
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Wang S, Hao G, Shen X, Jing D. Dynamic study of nitric oxide and endothelin-1 during endotoxin shock and effects of their antagonists on hemodynamics. Chin Med J (Engl) 1998; 111:242-7. [PMID: 10374426] [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: 02/12/2023] Open
Abstract
OBJECTIVE To examine the relationship between the profound hypotension in endotoxic shock and the dynamic changes of nitric oxide (NO) and endothelin-1 (ET-1), so as to figure out which of the NO or ET-1 was more involved in the pathogenesis of endotoxic shock. And to investigate whether an offset of their opposite vasoactive effects would occur during endotoxic shock. METHODS 24 rabbits were anesthetized and instrumented for recording hemodynamics. Endotoxin (E. coli 026: B6, 600 micrograms/kg) was bolus injected intravenously and the animals were randomly divided into four groups. Group I was control without any more intervention, and Group II, III, IV received bolus injections of L-NMA (10 mg/kg), phosphoramidon (2 mg/kg) or dexamethasone (2 mg/kg) respectively at 30 min post-endotoxin. Plasma NO3-, ET-1 and hemodynamics were measured at regular intervals. Their relationships were compared and analysed. RESULTS Plasma ET-1 achieved its peak level at 60 min post-endotoxin, and then waned. Plasma NO3- started rising at 120 min post-endotoxin, then progressive increase continued till the last measurement at 180 min post-endotoxin. The decrease of blood pressure was significant at about 120 min post-endotoxin and further went down until death. The changes of hemodynamics and NO showed a quite close temporal correspondence between the increase of NO and the decrease of blood pressure. L-NMA and phosphoramidon obviously reduced the plasma levels of NO and ET-1 to below their respective baseline levels, and showed transient effect of increase on blood pressure. Soon afterwards, however, the status of hemodynamics was aggravated. Dexamethasone just inhibited the excessive increase of NO and ET-1 during endotoxic shock without interfering their baseline levels and showed most beneficial effects on hemodynamics. CONCLUSIONS Both NO and ET-1 increase during endotoxic shock, but only the increase of NO has a close temporal correspondence with the decrease of blood pressure. It suggests a more important role of NO in pathogenesis of endotoxic shock. The increase of NO and ET-1 is different in time-process, which indicates that an offset of their opposite vasoactive effects would not occur. Intreference against the increase of NO and ET-1 during endotoxic shock is most beneficial when their baseline levels are maintained.
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Affiliation(s)
- S Wang
- Department of Pathophysiology, West China University of Medical Sciences, Chengdu, China
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Abstract
In order to investigate the changes in cellular distribution of the glycocalyces in nasal inverted papilloma, formalin-fixed, paraffin-embedded biopsy specimens of inverted papilloma were analyzed by the avidin-biotin-peroxidase complex technique for the demonstration of peanut agglutinin (PNA) receptors, concanavalin A (Canavalia ensiformis agglutinin; ConA) receptors, carcinoembryonic antigen (CEA), and keratin, and compared with normal nasal mucosa, nasal polyps, and papillary adenocarcinoma. The inverted papillomas were positive for PNA and CEA, to the same degree as papillary adenocarcinoma. Their PNA binding was related to the degree of dysplasia. The ConA reaction was intermediate between that of normal mucosa and adenocarcinoma. The results suggest that the alteration of cellular glycoprotein structure in inverted papilloma is associated with its biologic characterization.
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Affiliation(s)
- H Huang
- Department of Otolaryngology, Changhai Hospital, Shanghai, People's Republic of China
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