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He L, Yuan SZ, Mao XD, Zhao YW, He QH, Zhang Y, Su JZ, Wu LL, Yu GY, Cong X. Claudin-10 Decrease in the Submandibular Gland Contributes to Xerostomia. J Dent Res 2024; 103:167-176. [PMID: 38058154 DOI: 10.1177/00220345231210547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/08/2023] Open
Abstract
Tight junction proteins play a crucial role in paracellular transport in salivary gland epithelia. It is clear that severe xerostomia in patients with HELIX syndrome is caused by mutations in the claudin-10 gene. However, little is known about the expression pattern and role of claudin-10 in saliva secretion in physical and disease conditions. In the present study, we found that only claudin-10b transcript was expressed in human and mouse submandibular gland (SMG) tissues, and claudin-10 protein was dominantly distributed at the apicolateral membranes of acini in human, rat, and mouse SMGs. Overexpression of claudin-10 significantly reduced transepithelial electrical resistance and increased paracellular transport of dextran and Na+ in SMG-C6 cells. In C57BL/6 mice, pilocarpine stimulation promoted secretion and cation concentration in saliva in a dose-dependent increase. Assembly of claudin-10 to the most apicolateral portions in acini of SMGs was observed in the lower pilocarpine (1 mg/kg)-treated group, and this phenomenon was much obvious in the higher pilocarpine (10 mg/kg)-treated group. Furthermore, 7-, 14-, and 21-wk-old nonobese diabetic (NOD) and BALB/c mice were used to mimic the progression of hyposalivation in Sjögren syndrome. Intensity of claudin-10 protein was obviously lower in SMGs of 14- and 21-wk-old NOD mice compared with that of age-matched BALB/c mice. In the cultured mouse SMG tissues, interferon-γ (IFN-γ) downregulated claudin-10 expression. In claudin-10-overexpressed SMG-C6 cells, paracellular permeability was decreased. Furthermore, IFN-γ stimulation increased p-STAT1 level, whereas pretreatment with JAK/STAT1 antagonist significantly alleviated the IFN-γ-induced claudin-10 downregulation. These results indicate that claudin-10 functions as a pore-forming component in acinar epithelia of SMGs, assembly of claudin-10 is required for saliva secretion, and downregulation of claudin-10 induces hyposecretion. These findings may provide new clues to novel therapeutic targets on hyposalivation.
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Affiliation(s)
- L He
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Beijing, P. R. China
| | - S Z Yuan
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Beijing, P. R. China
| | - X D Mao
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Beijing, P. R. China
| | - Y W Zhao
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, P. R. China
| | - Q H He
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing, P. R. China
| | - Y Zhang
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Beijing, P. R. China
| | - J Z Su
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, P. R. China
| | - L L Wu
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Beijing, P. R. China
| | - G Y Yu
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, P. R. China
| | - X Cong
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Beijing, P. R. China
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Mao XD, Min SN, Zhu MQ, He L, Zhang Y, Li JW, Tian YX, Yu GY, Wu LL, Cong X. The Role of Endothelial Barrier Function in the Fibrosis of Salivary Gland. J Dent Res 2023; 102:82-92. [PMID: 36112881 DOI: 10.1177/00220345221118508] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In the salivary glands, fibrosis occurs in many pathological conditions. Endothelial tight junction (TJ)-based barrier function plays a vital role in maintaining the homeostasis of the salivary glands. However, whether endothelial barrier function is changed and involved in the pathogenesis of glandular fibrosis is unknown. Here, by using a mouse model in which the main excretory duct of the submandibular gland (SMG) was ligated to induce inflammation and fibrosis, endothelial barrier function and TJ protein expression and distribution were examined. Both 4-kDa and 70-kDa fluorescence-labeled dextrans permeated more in the 1-, 3-, and 7-d ligated SMGs. Meanwhile, the mRNA level of claudin-5 was increased with an obvious redistribution from apicolateral membranes to lateral membranes and cytoplasm in the fibrotic glands. Notably, the TJ sealer AT1001 significantly attenuated the disrupted endothelial barrier function and thereby ameliorated the glandular fibrosis. Cytokine array detection showed that monocyte chemoattractant protein-1 (MCP-1) was highly enriched in the 3-d ligated SMGs, and MCP-1 directly impaired barrier function, increased claudin-5 expression, induced the relocalization of claudin-5, and activated p-ERK1/2 in cultured human endothelial cells. Furthermore, the upregulation and disorganization of claudin-5 as well as the elevation of MCP-1 and p-ERK1/2 signaling were also confirmed in fibrotic SMGs from patients with chronic sialadenitis and immunoglobulin G4-related sialadenitis. Altogether, our findings revealed that disrupted endothelial barrier function contributed to the progression of glandular fibrosis, and targeting endothelial TJs might be a promising approach to alleviate salivary gland fibrosis-related diseases.
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Affiliation(s)
- X D Mao
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, P.R. China
| | - S N Min
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, P.R. China
| | - M Q Zhu
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, P.R. China
| | - L He
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, P.R. China
| | - Y Zhang
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, P.R. China
| | - J W Li
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, P.R. China
| | - Y X Tian
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, P.R. China
| | - G Y Yu
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, P.R. China
| | - L L Wu
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, P.R. China
| | - X Cong
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, P.R. China
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Lai X, Yang X, Rao S, Zhu Z, Cong X, Ye J, Zhang W, Liao Y, Cheng S, Xu F. Advances in physiological mechanisms of selenium to improve heavy metal stress tolerance in plants. Plant Biol (Stuttg) 2022; 24:913-919. [PMID: 35583793 DOI: 10.1111/plb.13435] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 05/02/2022] [Indexed: 06/15/2023]
Abstract
Selenium (Se) is a metalloid mineral nutrient for human and animal health. Plants are the main foodstuff source of the Se intake of humans. For plants, the addition of an appropriate amount of Se could promotes growth and development, and improves the tolerance to environmental stress, especially stress from some of heavy metals (HM) stress, such as cadmium (Cd) and mercury (Hg). This paper mainly reviews and summarizes the physiological mechanism of Se in enhancing HM stress tolerance in plants. The antagonistic effect of Se on HM is a comprehensive effect that includes many physiological mechanisms. Se can promote the removal of excessive reactive oxygen species and reduce the oxidative damage of plant cells under HM elements stress. Se participates in the regulation of the transportation and distribution of HM ions in plants, and alleviates the damage caused by of HM stress. Moreover, Se combine with HM elements to form Se-HM complexes and promote the production of phytochelatins (PCs), thereby reducing the accumulation of HM ions in plants. Overall, Se plays an important role in plant response to HM stress, but current studies mainly focus on physiological mechanism, and further in-depth study on the molecular mechanism is essential to confirm the participation of Se in plant response to environmental stress. This review helps to comprehensively understand the physiological mechanism of Se in plant tolerance against to HM stress of plants, and provides important theoretical support for the practical application of Se in environmental remediation and agricultural development.
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Affiliation(s)
- X Lai
- College of Horticulture and Gardening, Yangtze University, Jingzhou, China
| | - X Yang
- College of Horticulture and Gardening, Yangtze University, Jingzhou, China
| | - S Rao
- College of Horticulture and Gardening, Yangtze University, Jingzhou, China
- School of Modern Industry for Selenium Science and Engineering, National R&D Center for Se-rich Agricultural Products Processing Technology, Wuhan Polytechnic University, Wuhan, China
| | - Z Zhu
- School of Modern Industry for Selenium Science and Engineering, National R&D Center for Se-rich Agricultural Products Processing Technology, Wuhan Polytechnic University, Wuhan, China
| | - X Cong
- School of Modern Industry for Selenium Science and Engineering, National R&D Center for Se-rich Agricultural Products Processing Technology, Wuhan Polytechnic University, Wuhan, China
- Enshi Se-Run Health Tech Development Co., Ltd, Enshi, China
| | - J Ye
- College of Horticulture and Gardening, Yangtze University, Jingzhou, China
| | - W Zhang
- College of Horticulture and Gardening, Yangtze University, Jingzhou, China
| | - Y Liao
- College of Horticulture and Gardening, Yangtze University, Jingzhou, China
| | - S Cheng
- School of Modern Industry for Selenium Science and Engineering, National R&D Center for Se-rich Agricultural Products Processing Technology, Wuhan Polytechnic University, Wuhan, China
| | - F Xu
- College of Horticulture and Gardening, Yangtze University, Jingzhou, China
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Wang Z, Zhu X, Cong X. Spatial micro-variation of 3D hydrogel stiffness regulates the biomechanical properties of hMSCs. Biofabrication 2021; 13. [PMID: 34107453 DOI: 10.1088/1758-5090/ac0982] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 06/09/2021] [Indexed: 02/06/2023]
Abstract
Human mesenchymal stem cells (hMSCs) are one of the most promising candidates for cell-based therapeutic products. Nonetheless, their biomechanical phenotype afterin vitroexpansion is still unsatisfactory, for example, restricting the efficiency of microcirculation of delivered hMSCs for further cell therapies. Here, we propose a scheme using maleimide-dextran hydrogel with locally varied stiffness in microscale to modify the biomechanical properties of hMSCs in three-dimensional (3D) niches. We show that spatial micro-variation of stiffness can be controllably generated in the hydrogel with heterogeneously cross-linking via atomic force microscopy measurements. The result of 3D cell culture experiment demonstrates the hydrogels trigger the formation of multicellular spheroids, and the derived hMSCs could be rationally softened via adjustment of the stiffness variation (SV) degree. Importantly,in vitro, the hMSCs modified with the higher SV degree can pass easier through capillary-shaped micro-channels. Further, we discuss the underlying mechanics of the increased cellular elasticity by focusing on the effect of rearranged actin networks, via the proposed microscopic model of biomechanically modified cells. Overall, this work highlights the effectiveness of SV-hydrogels in reprogramming and manufacturing hMSCs with designed biomechanical properties for improved therapeutic potential.
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Affiliation(s)
- Zheng Wang
- College of Mechanical and Electrical Engineering, Hohai University, Changzhou, Jiangsu 213022, People's Republic of China
| | - Xiaolu Zhu
- College of Mechanical and Electrical Engineering, Hohai University, Changzhou, Jiangsu 213022, People's Republic of China.,Changzhou Key Laboratory of Digital Manufacture Technology, Hohai University, Changzhou, Jiangsu 213022, People's Republic of China.,Jiangsu Key Laboratory of Special Robot Technology, Hohai University, Changzhou, Jiangsu 213022, People's Republic of China
| | - Xiuli Cong
- Department of Orthopaedics, Zhejiang Hospital, No. 12 Lingyin Road, Hangzhou, Zhejiang 310013, People's Republic of China
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Casavant SG, Li H, Cong X, Starkweather A, Moore J, Rosenkrantz TS, Fitch RH. Behavioral and neuroanatomical outcomes following altered serotonin expression in a hypoxic-ischemic injury neonate rodent model. J Neonatal Perinatal Med 2021; 14:353-360. [PMID: 33164949 DOI: 10.3233/npm-200418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Children born prematurely (<37 gestational weeks) are at risk for a variety of adverse medical events. They may experience ischemic and/or hemorrhagic events leading to negative neural sequelae. They are also exposed to repeated stressful experiences as part of life-saving care within the neonatal intensive care unit (NICU). These experiences have been associated with methylation of SLC6A4, a gene which codes for serotonin transport proteins, and is associated with anxiety, depression, and increased incidence of autism spectrum disorders.The purpose of this study was to examine the effects of altered serotonin levels on behavioral and neuroanatomical outcomes in a neonatal rodent model with or without exposure to hypoxic-ischemic (HI) injury. METHODS Wistar rat pups were randomly assigned to either HI injury or sham groups. Pups within each group were treated with a chronic SSRI (Citalopram HBr) to simulate the effects of SLC6A4 methylation, or saline (NS). Subjects were assessed on behavioral tasks and neuropathologic indices. RESULTS HI injured subjects performed poorly on behavioral tasks. SSRI subjects did not display significantly greater anxiety. HI + SSRI subjects learned faster than HI+NS. Histologically, SSRI subjects had predominantly larger brain volumes than NS. CONCLUSION SSRI treated subjects without injury showed patterns of increased anxiety, consistent with theories of SLC6A4 methylation. The paradoxical trend to improved cognition in HI+SSRI subjects relative to HI alone, may reflect an unexpected SSRI neuroprotective effect in the presence of injury, and may be related to serotonin-induced neurogenesis.
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Affiliation(s)
- S G Casavant
- University of Connecticut, School of Nursing, Storrs, CT, USA
| | - H Li
- University of Connecticut, Department of Statistics, Storrs, CT, USA
| | - X Cong
- University of Connecticut, School of Nursing, Storrs, CT, USA
| | - A Starkweather
- University of Connecticut, School of Nursing, Storrs, CT, USA
| | - J Moore
- University of Connecticut School of Medicine, Farmington, CT, USA
- Connecticut Children's Medical Center, Hartford, CT, USA
| | - T S Rosenkrantz
- University of Connecticut School of Medicine, Farmington, CT, USA
- Connecticut Children's Medical Center, Hartford, CT, USA
| | - R H Fitch
- University of Connecticut, Department of Psychological Sciences, Storrs, CT, USA
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Abstract
Volume and composition of saliva are crucial for oral and systemic health. How substances, particularly macromolecules, are transported across the salivary gland epithelium has not been established in detail. Tricellulin is a component of tricellular tight junctions that form a central tube to serve as an important route for macromolecule transport. Whether tricellulin is expressed in the submandibular gland (SMG) and involved in salivation has been unknown. Here, by using Western blotting and immunofluorescence, tricellulin was found to be characteristically localized at tricellular contacts of human, rat, and mouse SMGs. Knockdown of tricellulin significantly increased, whereas overexpression of tricellulin decreased, paracellular permeability for 40-kDa but not for 4-kDa fluorescein isothiocyanate–dextran, while transepithelial electrical resistance was unaffected. Conversely, claudin-4 knockdown and overexpression affected transepithelial electrical resistance but not 40-kDa fluorescein isothiocyanate–dextran transport, suggesting that tricellulin regulated transport of macromolecules but not ions, which were mainly regulated by bicellular tight junctions (bTJs). Moreover, tricellulin was dynamically redistributed from tri- to bicellular membranes in cholinergically stimulated SMG tissues and cells. Immunoglobulin-like domain-containing receptor 1 (ILDR1) recruits tricellulin to tricellular contacts. The proportion of macromolecules in the saliva was increased, whereas the amount of stimulated saliva was unchanged in Ildr1-/- mice, which displayed abnormal tricellulin distribution in SMGs. Furthermore, tricellulin interacted with bTJ proteins, such as occludin, claudin-1, claudin-3, claudin-4, and ZO-1, in rat SMG epithelial polarized cell line SMG-C6. Knockdown of tricellulin decreased occludin levels. Thus, we revealed a specific expression pattern of tricellulin in SMG epithelium. Tricellulin not only functioned as a barrier for macromolecules but also modulated the connection of bTJs to the tight junction complex. Alterations in tricellulin expression and distribution could thereby change salivary composition. Our study provided novel insights on salivary gland tight junction organization and function.
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Affiliation(s)
- S.N. Min
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing, China
| | - X. Cong
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, China
| | - Y. Zhang
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, China
| | - R.L. Xiang
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, China
| | - Y. Zhou
- Department of Clinical Laboratory, China-Japan Friendship Hospital, Beijing, China
| | - G.Y. Yu
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing, China
| | - L.L. Wu
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, China
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Cong X, Min SN, Wu LL, Cai ZG, Yu GY. [Role and mechanism of muscarinic acetylcholine receptor in the regulation of submandibular gland secretion]. Beijing Da Xue Xue Bao Yi Xue Ban 2019; 51:390-396. [PMID: 31209407 DOI: 10.19723/j.issn.1671-167x.2019.03.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Muscarinic acetylcholine receptors (mAChRs), including M1-M5 subtypes, are classic receptors in regulating water, ion, and solute transport in salivary gland. Our work focuses on the studies on the expression pattern and function of mAChR in the submandibular gland (SMG), and the underlying mechanism involved in the mAChR-regulated secretion, together with the effect of parasympathectomy on the salivary secretion. Microvascular autotransplantation of SMG into the temporal fossa provides a continuous and endogenous source of fluids, and is currently an effective method for treating severe keratoconjunctivitis sicca. By using RT-PCR, Western blotting, and immunofluorescence, our data demonstrated that the expression of M1 and M3 subtypes were decreased in latent period in rabbit SMG autotransplantation model, whereas carbachol stimulation promoted the salivary secretion, as well as M1 and M3 expressions. By contrast, mAChRs were hypersensitive in epiphora SMGs, whereas atropine gel and botulinum toxin A application significantly inhibited the hypersecretion in both animal models and patients. Furthermore, the possible intracellular signal molecules involved in the mAChR-modulated salivary secretion were explored. Activation of mAChR upregulated the expression of aquaporin 5 (AQP5), the main transporter that mediated water secretion through transcellular pathway, and led to AQP5 trafficking from lipid rafts to non-lipid microdomain. Extracellular signal-regulated kinase 1/2 (ERK1/2) was involved in the mAChR-regulated AQP5 content. mAChR activation also modulated the expression, distribution, and function of tight junction proteins, and increased paracellular permeability. ERK1/2/β-arrestin2/clathrin/ubiquitin signaling pathway was responsible for the mAChR-regulated downregulation of tight junction molecule claudin-4. Cytoskeleton filamentous actin (F-actin) was also involved in the distribution and barrier function of epithelial tight junctions. Besides, endothelial tight junctions were opened by mAChR agonist-evoked salivation in the mice. Furthermore, parasympathetic denervation increased resting salivary secretion in the long terminrats and minipigs. Taken together, our work demonstrated that mAChR regulated saliva secretion via transcellular and paracellular pathways in SMG epithelium as well as tight junction opening in SMG endothelium. Modulation of mAChR might be a promising strategy to ameliorate SMG dysfunction.
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Affiliation(s)
- X Cong
- Center for Salivary Gland Diseases, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China.,Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Beijing 100191, China
| | - S N Min
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - L L Wu
- Center for Salivary Gland Diseases, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China.,Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Beijing 100191, China
| | - Z G Cai
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - G Y Yu
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing 100081, China
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Zhang LW, Zhou PR, Wei P, Cong X, Wu LL, Hua H. Expression of interleukin-17 in primary Sjögren's syndrome and the correlation with disease severity: A systematic review and meta-analysis. Scand J Immunol 2018; 87:e12649. [PMID: 29476557 DOI: 10.1111/sji.12649] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2018] [Accepted: 02/15/2018] [Indexed: 12/26/2022]
Affiliation(s)
- L.-W. Zhang
- Department of Oral Medicine; Peking University School and Hospital of Stomatology; Beijing China
| | - P.-R. Zhou
- Department of Oral Medicine; Peking University School and Hospital of Stomatology; Beijing China
| | - P. Wei
- Department of Oral Medicine; Peking University School and Hospital of Stomatology; Beijing China
| | - X. Cong
- Department of Physiology and Pathophysiology; Peking University Health Science Center; Key Laboratory of Molecular Cardiovascular Sciences; Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research; Beijing China
| | - L.-L. Wu
- Department of Physiology and Pathophysiology; Peking University Health Science Center; Key Laboratory of Molecular Cardiovascular Sciences; Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research; Beijing China
| | - H. Hua
- Department of Oral Medicine; Peking University School and Hospital of Stomatology; Beijing China
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Zheng S, Wu X, Shi J, Peng Z, Gao M, Xin C, Liu Y, Wang S, Xu S, Han H, Yu J, Sun W, Cong X, Li J, Wang J. Rapid specific and visible detection of porcine circovirus type 3 using loop-mediated isothermal amplification (LAMP). Transbound Emerg Dis 2018; 65:597-601. [PMID: 29504259 DOI: 10.1111/tbed.12835] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Indexed: 11/30/2022]
Abstract
In this study, a rapid and specific assay for the detection of porcine circovirus type 3 (PCV3) was established using loop-mediated isothermal amplification (LAMP). Four primers were specifically designed to amplify PCV3. The LAMP assay was effectively optimized to amplify PCV3 by water bath at 60°C for 60 min. The detection limit was approximately 1 × 101 copy in this LAMP assay. Compared to porcine circovirus type 2 (PCV2), both gE and gD genes of pseudorabies virus (PRV) and porcine parvovirus (PPV), the LAMP assay showed a high specific detection of PCV3. A visible detection method was developed using SYBR Green I to recognize the results rapidly. Based on the detection of 20 clinical tissue samples, the LAMP assay was more practical and convenient than classical PCR due to its simplicity, high sensitivity, rapidity, specificity, visibility and cost efficiency.
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Affiliation(s)
- S Zheng
- Shandong Provincial Key Laboratory of Animal Disease Control & Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China.,Qingdao Agricultural University, Qingdao, China
| | - X Wu
- Shandong Provincial Key Laboratory of Animal Disease Control & Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China
| | - J Shi
- Shandong Provincial Key Laboratory of Animal Disease Control & Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China
| | - Z Peng
- Shandong Provincial Key Laboratory of Animal Disease Control & Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China
| | - M Gao
- Shandong Normal University, Jinan, China
| | - C Xin
- Shandong Provincial Key Laboratory of Animal Disease Control & Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China.,Qingdao Agricultural University, Qingdao, China
| | - Y Liu
- Shandong Normal University, Jinan, China
| | - S Wang
- Shandong Normal University, Jinan, China
| | - S Xu
- Shandong Provincial Key Laboratory of Animal Disease Control & Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China
| | - H Han
- Shandong Provincial Key Laboratory of Animal Disease Control & Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China
| | - J Yu
- Shandong Provincial Key Laboratory of Animal Disease Control & Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China
| | - W Sun
- Shandong Provincial Key Laboratory of Animal Disease Control & Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China
| | - X Cong
- Shandong Provincial Key Laboratory of Animal Disease Control & Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China
| | - J Li
- Shandong Provincial Key Laboratory of Animal Disease Control & Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China
| | - J Wang
- Shandong Provincial Key Laboratory of Animal Disease Control & Breeding, Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan, China
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Yu GY, Wu LL, Cai ZG, Lv L, Cong X. [A 20-year study on microvascular autologous transplantation of submandibular gland for treatment of severe dry eye]. Beijing Da Xue Xue Bao Yi Xue Ban 2018; 50:1-4. [PMID: 29483714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Severe dry eye is a refractory ophthalmologic disease. Our multidisciplinary research group treated severe dry eye by microvascular autologous transplantation of submandibular gland (SMG) during the past 20 years. The SMG, with its blood vessels and Wharton's duct, was harvested from the submandibular triangle and transferred to the temporal area. The blood vessels in the SMG were anastomosed with the temporal blood vessels using a microsurgical technique. Then, the distal end of Wharton's duct was sutured to form an opening in the upper lateral conjunctival fold. The tear was replaced by the secretion of the transplanted SMG to lubricate the ocular surface. In our study, the surgical techniques of blood vessel management were continuously modified to increase the survival rate of the transplanted SMG. A novel surgical modality of partial transplantation of SMG was established to prevent postoperative epiphora. A clinical study with the largest case number in the world was conducted and the effectiveness of transplantation of SMG for severe dry eye was fully confirmed. In order to resolve two main clinical problems including ductal obstruction resulted from low secretion rate during the latent period, and epiphora due to over secretion of the transplanted SMG in the later term of transplantation, the regulation of the secretion mechanism of the normal and transplanted SMG were investigated. New opinions on mechanisms of saliva secretion were provided. Based on the priniciple of translational medicine, the results of related basic research were applied in the clinic. The clinical guidelines for secretion regulation of transplanted SMG were established. A concept of chronic obstructive sialadenitis of transplanted SMG was provided and its diagnostic criteria, diagnostic technique of sialography, and therapeutic regimen were established. As a result, the surgical success rate was obviously elevated, the surgical complications were decreased, and life quality of the patients was greatly improved.
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Affiliation(s)
- G Y Yu
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - L L Wu
- Center for Salivary Gland Diseases, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China; Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Beijing 100191, China
| | - Z G Cai
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - L Lv
- Department of Ophthalmology, Beijing Tongren Hospital, Capital Medical University, Beijing 100069, China
| | - X Cong
- Center for Salivary Gland Diseases, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China; Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Beijing 100191, China
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Zheng S, Shi J, Wu X, Peng Z, Xin C, Zhang L, Liu Y, Gao M, Xu S, Han H, Yu J, Sun W, Cong X, Li J, Wang J. Presence of Torque teno sus virus 1 and 2 in porcine circovirus 3-positive pigs. Transbound Emerg Dis 2017; 65:327-330. [PMID: 29285888 DOI: 10.1111/tbed.12792] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Indexed: 12/01/2022]
Abstract
In this study, the co-infection of Torque teno sus virus (TTSuV) and porcine circovirus type 3 (PCV3) was reported. One hundred and ten of 132 (83.3%) PCV3-positive samples were co-infected with Torque teno sus virus 1 (TTSuV1). Ninety-four of 132 (71.2%) PCV3-positive samples were co-infected with Torque teno sus virus 2 (TTSuV2). Sixty-six of 132 (50.0%) of PCV3-positive samples were co-infected with both TTSuV1 and TTSuV2. There were no clinical signs of infection in pigs that were both PCV3-positive and PCV2-negative, in either multiparous sows or live-born infants. The high co-infection rate provides valuable information for the further study of the pathological correlation between PCV3 and TTSuVs.
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Affiliation(s)
- S Zheng
- Shandong Provincial Key Laboratory of Animal Disease Control & Breeding, Institute of Animal Science and Veterinary Medicine Shandong Academy of Agricultural Sciences, Jinan, China.,Qingdao Agricultural University, Qingdao, China
| | - J Shi
- Shandong Provincial Key Laboratory of Animal Disease Control & Breeding, Institute of Animal Science and Veterinary Medicine Shandong Academy of Agricultural Sciences, Jinan, China
| | - X Wu
- Shandong Provincial Key Laboratory of Animal Disease Control & Breeding, Institute of Animal Science and Veterinary Medicine Shandong Academy of Agricultural Sciences, Jinan, China
| | - Z Peng
- Shandong Provincial Key Laboratory of Animal Disease Control & Breeding, Institute of Animal Science and Veterinary Medicine Shandong Academy of Agricultural Sciences, Jinan, China
| | - C Xin
- Shandong Provincial Key Laboratory of Animal Disease Control & Breeding, Institute of Animal Science and Veterinary Medicine Shandong Academy of Agricultural Sciences, Jinan, China.,Qingdao Agricultural University, Qingdao, China
| | - L Zhang
- Shandong Provincial Key Laboratory of Animal Disease Control & Breeding, Institute of Animal Science and Veterinary Medicine Shandong Academy of Agricultural Sciences, Jinan, China
| | - Y Liu
- Shandong Normal University, Jinan, China
| | - M Gao
- Shandong Normal University, Jinan, China
| | - S Xu
- Shandong Provincial Key Laboratory of Animal Disease Control & Breeding, Institute of Animal Science and Veterinary Medicine Shandong Academy of Agricultural Sciences, Jinan, China
| | - H Han
- Shandong Provincial Key Laboratory of Animal Disease Control & Breeding, Institute of Animal Science and Veterinary Medicine Shandong Academy of Agricultural Sciences, Jinan, China
| | - J Yu
- Shandong Provincial Key Laboratory of Animal Disease Control & Breeding, Institute of Animal Science and Veterinary Medicine Shandong Academy of Agricultural Sciences, Jinan, China
| | - W Sun
- Shandong Provincial Key Laboratory of Animal Disease Control & Breeding, Institute of Animal Science and Veterinary Medicine Shandong Academy of Agricultural Sciences, Jinan, China
| | - X Cong
- Shandong Provincial Key Laboratory of Animal Disease Control & Breeding, Institute of Animal Science and Veterinary Medicine Shandong Academy of Agricultural Sciences, Jinan, China
| | - J Li
- Shandong Provincial Key Laboratory of Animal Disease Control & Breeding, Institute of Animal Science and Veterinary Medicine Shandong Academy of Agricultural Sciences, Jinan, China
| | - J Wang
- Shandong Provincial Key Laboratory of Animal Disease Control & Breeding, Institute of Animal Science and Veterinary Medicine Shandong Academy of Agricultural Sciences, Jinan, China
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Wang J, Zhou M, Dong R, Cong X, Zhang R, Wang X. Simultaneous Determination of Peroxide Hydrogen and Ascorbic Acid by Capillary Electrophoresis with Platinum Nanoparticles Modified Micro-disk Electrode. ELECTROANAL 2017. [DOI: 10.1002/elan.201600407] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- J. Wang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Institute of Molecular and Nano Science; Shandong Normal University; Jinan 250014 P. R. China
| | - M. Zhou
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Institute of Molecular and Nano Science; Shandong Normal University; Jinan 250014 P. R. China
| | - R. Dong
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Institute of Molecular and Nano Science; Shandong Normal University; Jinan 250014 P. R. China
| | - X. Cong
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Institute of Molecular and Nano Science; Shandong Normal University; Jinan 250014 P. R. China
| | - R. Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Institute of Molecular and Nano Science; Shandong Normal University; Jinan 250014 P. R. China
| | - X. Wang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Institute of Molecular and Nano Science; Shandong Normal University; Jinan 250014 P. R. China
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Cong X, Zhang Y, He QH, Wei T, Zhang XM, Zhang JZ, Xiang RL, Yu GY, Wu LL. Endothelial Tight Junctions Are Opened in Cholinergic-Evoked Salivation In Vivo. J Dent Res 2017; 96:562-570. [PMID: 28118553 DOI: 10.1177/0022034516685048] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Blood vessels provide the original supplies for the formation of primary saliva, which is regulated by the tight junctions (TJs) between endothelial cells. Previous studies have shown that blood flow increases with vasodilatation during cholinergic-evoked salivation. However, changes in vascular paracellular permeability and the role of endothelial TJs in salivation are unknown. Here, we established an in vivo paracellular permeability detection system and observed that the endothelial TJs were permeable to 4-kDa fluorescein isothiocyanate (FITC)-dextran while impermeable to 40- and 70-kDa FITC-dextran under an unstimulated condition in mouse submandibular glands (SMGs). Pilocarpine increased the flux of 4- and 40-kDa FITC-dextran out of blood vessels but did not affect 70-kDa FITC-dextran. Claudin 5, a TJ protein specifically localized in salivary endothelial cells, was redistributed from the apicolateral membranes to the lateral and basolateral membranes and cytoplasm in cholinergic-stimulated mouse SMGs and freshly cultured human SMG tissues. In the transplanted SMGs from epiphora patients, we found that claudin 5 was present in the basolateral membranes and cytoplasm, instead of the apical region in control SMGs. Moreover, the level of phospho-myosin light chain 2 increased within the blood vessels of the pilocarpine-stimulated mouse SMGs and transplanted human SMGs, while the downstream molecule F-actin was reorganized in the endothelial cells of the transplanted human SMGs. Taken together, our findings provide direct visual evidence that the opening of endothelial TJs and the redistribution of claudin 5 are essential events contributing to cholinergic-evoked salivation, thus enriching our understanding of the secretory mechanisms that link blood flow to primary saliva formation by regulating the endothelial paracellular permeability.
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Affiliation(s)
- X Cong
- 1 Center for Salivary Gland Diseases of Peking University School and Hospital of Stomatology, Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, P.R. China
| | - Y Zhang
- 1 Center for Salivary Gland Diseases of Peking University School and Hospital of Stomatology, Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, P.R. China
| | - Q H He
- 2 Center of Medical and Health Analysis, Peking University Health Science Center, Beijing, P.R. China
| | - T Wei
- 3 Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, P.R. China
| | - X M Zhang
- 3 Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, P.R. China
| | - J Z Zhang
- 1 Center for Salivary Gland Diseases of Peking University School and Hospital of Stomatology, Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, P.R. China
| | - R L Xiang
- 1 Center for Salivary Gland Diseases of Peking University School and Hospital of Stomatology, Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, P.R. China
| | - G Y Yu
- 3 Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, P.R. China
| | - L L Wu
- 1 Center for Salivary Gland Diseases of Peking University School and Hospital of Stomatology, Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, P.R. China
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Zhang LW, Cong X, Yu GY, Wu LL, Hua H. AB0144 Interleukin-17 Impairs Salivary Tight Junctions in Non-Obese Diabetic Mice. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.2144] [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: 11/04/2022]
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Zhang LW, Cong X, Zhang Y, Wei T, Su YC, Serrão ACA, Brito ART, Yu GY, Hua H, Wu LL. Interleukin-17 Impairs Salivary Tight Junction Integrity in Sjögren's Syndrome. J Dent Res 2016; 95:784-92. [PMID: 26933138 DOI: 10.1177/0022034516634647] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Sjögren's syndrome (SS) is an inflammatory autoimmune disease that causes secretory dysfunction of the salivary glands. It has been reported that proinflammatory cytokine interleukin-17 (IL-17) was elevated and tight junction (TJ) integrity disrupted in minor salivary glands from SS patients. However, whether the elevated IL-17 in SS affects TJ integrity and thereby alters the function of salivary gland is unknown. Here, by using nonobese diabetic (NOD) mice as SS model, we found that the stimulated salivary flow rate was significantly decreased in NOD mice. Lymphocyte infiltration was mainly observed in submandibular glands (SMGs), but not parotid glands (PGs), of NOD mice. IL-17 was significantly increased and mainly located in lymphocytic-infiltrating regions in SMGs but not detectable in PGs of NOD mice. Meanwhile, the epithelial barrier function was disrupted, as evidenced by an increased paracellular tracer clearance and an enlarged acinar TJ width in SMGs of NOD mice. Furthermore, claudin-1 and -3 were elevated especially at the basolateral membranes, whereas claudin-4, occludin, and zonula occludens-1 (ZO-1) were reduced in SMGs of NOD mice. Moreover, occludin and ZO-1 were dispersed into cytoplasm in SMGs of NOD mice. However, no change in the expression and distribution of TJ proteins was found in PGs. In vitro, IL-17 significantly decreased the levels and apical staining of claudin-4 and ZO-1 proteins in the cultured SMG tissues, as well as claudin-1, occludin, and ZO-1 in PG tissues. Moreover, IL-17 activated the phosphorylation of IκBα and p65 in SMG cells, whereas pretreatment with NF-κB inhibitor pyrrolidine dithiocarbamate suppressed the IL-17-induced downregulation of claudin-4 and ZO-1 in SMG tissues. Taken together, these findings indicate that IL-17 derived from infiltrating lymphocyte impairs the integrity of TJ barrier through NF-κB signaling pathway, and thus might contribute to salivary gland dysfunction in SS.
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Affiliation(s)
- L W Zhang
- Department of Oral Medicine and Center for Salivary Gland Diseases of Peking University School and Hospital of Stomatology, Beijing, P.R. China
| | - X Cong
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, P.R. China
| | - Y Zhang
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, P.R. China
| | - T Wei
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, P.R. China
| | - Y C Su
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, P.R. China
| | - A C A Serrão
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, P.R. China Department of Dentistry, Santa Cecília University, Santos, Brazil
| | - A R T Brito
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, P.R. China Department of Dentistry, Santa Cecília University, Santos, Brazil
| | - G Y Yu
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, P.R. China
| | - H Hua
- Department of Oral Medicine and Center for Salivary Gland Diseases of Peking University School and Hospital of Stomatology, Beijing, P.R. China
| | - L L Wu
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, P.R. China
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Li J, Cong X, Zhang Y, Xiang R, Mei M, Yang N, Su Y, Choi S, Park K, Zhang L, Wu L, Yu G. ZO-1 and -2 Are Required for TRPV1-Modulated Paracellular Permeability. J Dent Res 2015; 94:1748-56. [DOI: 10.1177/0022034515609268] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
The tight junction–based paracellular pathway plays an important role in saliva secretion. Zonula occludens (ZO) proteins are submembranous proteins of tight junction complex; however, their function in salivary epithelium is poorly understood. Here, we found that activation of transient receptor potential vanilloid subtype 1 (TRPV1) by capsaicin increased rat saliva secretion both in vivo and ex vivo. Meanwhile, TRPV1 activation enlarged the width of tight junctions between neighboring acinar cells, increased the paracellular flux of 4-kDa fluorescein isothiocyanate (FITC)-dextran in submandibular gland (SMG) tissues, and decreased transepithelial electric resistance (TER) in SMG-C6 cells. ZO-1, -2, and -3 were distributed principally to the apical lateral region of acinar cells in SMG tissues and continuously encircled the peripheries of SMG-C6 cells in the untreated condition. TRPV1 activation obviously diminished ZO-1 and -2 staining, but not ZO-3 or β-catenin, at the cell-cell contacts ex vivo and in vitro. Moreover, in untreated SMG-C6 cells, ZO-1 and -2 single or double knockdown by small interfering RNA (siRNA) increased the paracellular flux of 4-kDa FITC-dextran. In capsaicin-treated cells, ZO-1 and -2 single or double knockdown abolished, whereas their re-expression restored, the capsaicin-induced increase in paracellular permeability. Furthermore, TRPV1 activation increased RhoA activity, and inhibition of either RhoA or Rho kinase (ROCK) abolished the capsaicin-induced TER decrease as well as ZO-1 and -2 redistribution. These results indicate that ZO-1 and -2 play crucial roles in both basal salivary epithelial barrier function and TRPV1-modulated paracellular transport. RhoA-ROCK signaling pathway is responsible for TRPV1-modulated paracellular permeability as well as ZO-1 and -2 redistribution.
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Affiliation(s)
- J. Li
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, China
| | - X. Cong
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, China
| | - Y. Zhang
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, China
| | - R.L. Xiang
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, China
| | - M. Mei
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, China
| | - N.Y. Yang
- Department of Pediatric Dentistry, Beijing Stomatological Hospital, Capital Medical University, Beijing, China
| | - Y.C. Su
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, China
| | - S. Choi
- Department of Physiology, School of Dentistry, Seoul National University, Seoul, South Korea
| | - K. Park
- Department of Physiology, School of Dentistry, Seoul National University, Seoul, South Korea
| | - L.W. Zhang
- Department of Oral Medicine, Peking University School and Hospital of Stomatology, Beijing, China
| | - L.L. Wu
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, China
| | - G.Y. Yu
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, China
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Xu H, Shan XF, Cong X, Yang NY, Wu LL, Yu GY, Zhang Y, Cai ZG. Pre- and Post-synaptic Effects of Botulinum Toxin A on Submandibular Glands. J Dent Res 2015; 94:1454-62. [PMID: 26078423 DOI: 10.1177/0022034515590087] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Intraglandular injection of botulinum toxin type A (BoNT/A) is an effective treatment for sialorrhea. Despite numerous experimental and clinical studies on inhibition of saliva section by BoNT/A, the proteolysis of synaptosomal-associated protein 25 (SNAP-25) following BoNT/A treatment has not yet been confirmed in the salivary gland after injection of BoNT/A. More important, it is not known whether BoNT/A exerts a direct effect in acinar cells. Here, we show that injection of BoNT/A into the rat submandibular gland (SMG) decreased salivary flow in a dose-dependent manner; the inhibitory effect lasted at least 4 wk, and salivary flow recovered to normal levels by 12 wk. During the inhibitory period, SMG neurons and synapses expressed lower levels of full-length SNAP-25, and cleavage of SNAP-25 was observed, as indicated by detection of reduced molecular weight SNAP-25 using Western blotting. In addition, the water channel aquaporin 5 (AQP5) was downregulated and abnormally distributed in rat SMG after injection of BoNT/A. The direct effects of BoNT/A on AQP5 expression and distribution were assessed in vitro to exclude the influence of BoNT/A-induced inhibitory neurotransmission. In stable GFP-AQP5-transfected SMG-C6 cells, treatment with BoNT/A reduced the cell surface protein level of AQP5 in a dose- and time-dependent manner without affecting total AQP5 protein expression. Cell surface biotinylation and immunofluorescence demonstrated translocation of AQP5 from the membrane to the cytoplasm, which was confirmed by decreased levels of AQP5 protein in the membrane fraction and increased levels in the cytoplasmic fraction, suggestive of AQP5 redistribution. Taken together, these results indicated that BoNT/A reversibly decreased saliva secretion in rat SMGs through not only the presynaptic SNAP-25 cleavage but also the postsynaptic AQP5 redistribution. These data provide the first evidence for a direct effect of BoNT/A on the salivary gland.
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Affiliation(s)
- H Xu
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, China
| | - X F Shan
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, China
| | - X Cong
- Department of Physiology and Pathophysiology, Peking University Health Science Centre and Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, Beijing, China
| | - N Y Yang
- Department of Pediatric Dentistry, Beijing Stomatological Hospital, Capital Medical University, Beijing, China
| | - L L Wu
- Department of Physiology and Pathophysiology, Peking University Health Science Centre and Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, Beijing, China
| | - G Y Yu
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, China
| | - Y Zhang
- Department of Physiology and Pathophysiology, Peking University Health Science Centre and Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, Beijing, China
| | - Z G Cai
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing, China
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Xu S, Xie C, Qu B, Yu W, Xu W, Ge R, Cong X. SU-E-T-744: The Study of Total Marrow Irradiation Based On Rotational Intensity-Modulated Techniques. Med Phys 2015. [DOI: 10.1118/1.4925108] [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: 11/07/2022] Open
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Jiang P, Mukthavaram R, Chao Y, Bharati IS, Fogal V, Pastorino S, Cong X, Nomura N, Gallagher M, Abbasi T, Vali S, Pingle SC, Makale M, Kesari S. Erratum to: novel anti-glioblastoma agents and therapeutic combinations identified from a collection of FDA approved drugs. Lab Invest 2014. [PMCID: PMC4023490 DOI: 10.1186/1479-5876-12-126] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Jiang P, Mukthavaram R, Chao Y, Nomura N, Bharati IS, Fogal V, Pastorino S, Teng D, Cong X, Pingle SC, Kapoor S, Shetty K, Aggrawal A, Vali S, Abbasi T, Chien S, Kesari S. In vitro and in vivo anticancer effects of mevalonate pathway modulation on human cancer cells. Br J Cancer 2014; 111:1562-71. [PMID: 25093497 PMCID: PMC4200085 DOI: 10.1038/bjc.2014.431] [Citation(s) in RCA: 138] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Revised: 07/07/2014] [Accepted: 07/09/2014] [Indexed: 12/13/2022] Open
Abstract
Background: The increasing usage of statins (the 3-hydroxy-3-methylglutaryl-coenzyme A reductase inhibitors) has revealed a number of unexpected beneficial effects, including a reduction in cancer risk. Methods: We investigated the direct anticancer effects of different statins approved for clinical use on human breast and brain cancer cells. We also explored the effects of statins on cancer cells using in silico simulations. Results: In vitro studies showed that cerivastatin, pitavastatin, and fluvastatin were the most potent anti-proliferative, autophagy inducing agents in human cancer cells including stem cell-like primary glioblastoma cell lines. Consistently, pitavastatin was more effective than fluvastatin in inhibiting U87 tumour growth in vivo. Intraperitoneal injection was much better than oral administration in delaying glioblastoma growth. Following statin treatment, tumour cells were rescued by adding mevalonate and geranylgeranyl pyrophosphate. Knockdown of geranylgeranyl pyrophosphate synthetase-1 also induced strong cell autophagy and cell death in vitro and reduced U87 tumour growth in vivo. These data demonstrate that statins main effect is via targeting the mevalonate synthesis pathway in tumour cells. Conclusions: Our study demonstrates the potent anticancer effects of statins. These safe and well-tolerated drugs need to be further investigated as cancer chemotherapeutics in comprehensive clinical studies.
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Affiliation(s)
- P Jiang
- Translational Neuro-Oncology Laboratories, Moores Cancer Center, UC San Diego, La Jolla, CA 92093, USA
| | - R Mukthavaram
- Translational Neuro-Oncology Laboratories, Moores Cancer Center, UC San Diego, La Jolla, CA 92093, USA
| | - Y Chao
- Translational Neuro-Oncology Laboratories, Moores Cancer Center, UC San Diego, La Jolla, CA 92093, USA
| | - N Nomura
- Translational Neuro-Oncology Laboratories, Moores Cancer Center, UC San Diego, La Jolla, CA 92093, USA
| | - I S Bharati
- Translational Neuro-Oncology Laboratories, Moores Cancer Center, UC San Diego, La Jolla, CA 92093, USA
| | - V Fogal
- Translational Neuro-Oncology Laboratories, Moores Cancer Center, UC San Diego, La Jolla, CA 92093, USA
| | - S Pastorino
- Translational Neuro-Oncology Laboratories, Moores Cancer Center, UC San Diego, La Jolla, CA 92093, USA
| | - D Teng
- Departments of Bioengineering and Medicine and Institute of Engineering in Medicine, UC San Diego, La Jolla, CA 92093, USA
| | - X Cong
- Translational Neuro-Oncology Laboratories, Moores Cancer Center, UC San Diego, La Jolla, CA 92093, USA
| | - S C Pingle
- Translational Neuro-Oncology Laboratories, Moores Cancer Center, UC San Diego, La Jolla, CA 92093, USA
| | - S Kapoor
- Cellworks Group, Inc., 2025 Gateway Place, Suite 265, San Jose, CA 95110, USA
| | - K Shetty
- Cellworks Group, Inc., 2025 Gateway Place, Suite 265, San Jose, CA 95110, USA
| | - A Aggrawal
- Cellworks Group, Inc., 2025 Gateway Place, Suite 265, San Jose, CA 95110, USA
| | - S Vali
- Cellworks Group, Inc., 2025 Gateway Place, Suite 265, San Jose, CA 95110, USA
| | - T Abbasi
- Cellworks Group, Inc., 2025 Gateway Place, Suite 265, San Jose, CA 95110, USA
| | - S Chien
- Departments of Bioengineering and Medicine and Institute of Engineering in Medicine, UC San Diego, La Jolla, CA 92093, USA
| | - S Kesari
- 1] Translational Neuro-Oncology Laboratories, Moores Cancer Center, UC San Diego, La Jolla, CA 92093, USA [2] Department of Neurosciences, UC San Diego, La Jolla, CA 92093, USA
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Zhang Y, Cong X, Wang A, Jiang H. Identification of the STAC3 gene as a skeletal muscle-specifically expressed gene and a novel regulator of satellite cell differentiation in cattle1. J Anim Sci 2014; 92:3284-90. [DOI: 10.2527/jas.2014-7656] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Affiliation(s)
- Y. Zhang
- Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg 24061-0306
| | - X. Cong
- Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg 24061-0306
| | - A. Wang
- Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg 24061-0306
| | - H. Jiang
- Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg 24061-0306
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22
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Lu N, Chen J, Yuan Y, Cong X, Yang Y, Meng L, Sun K, Hui R, Zheng Y. The C-1021T polymorphism of dopamine β-hydroxylase is not associated with orthostatic hypotension in a Chinese population. J Hum Hypertens 2014; 29:173-8. [PMID: 24990418 DOI: 10.1038/jhh.2014.54] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2013] [Revised: 04/17/2014] [Accepted: 05/27/2014] [Indexed: 11/09/2022]
Abstract
To explore the association between the dopamine β-hydroxylase (DBH) gene C-1021T polymorphism and the occurrence of orthostatic hypotension (OH) in Chinese patients, the DBH C-1021T polymorphism was genotyped in 317 patients with OH and 664 age- and sex-matched controls with orthostatic normotension. All subjects underwent an upright posture study for the measurement of orthostatic blood pressure. OH was defined as a drop in blood pressure of 20/10 mm Hg or more within 3 min of assuming the upright posture. The allele frequency of the DBH C-1021T polymorphism in the orthostatic hypotensive group was similar to the orthostatic normotensive group (17.4 versus 14.9%, P>0.05). No statistical significant association was found between the distribution of the C-1021T genotypes and the risk of OH in both the orthostatic hypotensive and orthostatic normotensive groups even after adjustment for demographic parameters. Among the three different genotypes, blood pressure levels did not significantly differ in the general population in this study. The changes in orthostatic systolic or diastolic blood pressures among the different genotype groups were not detected (all P>0.05). The C-1021T polymorphism of the DBH was not associated with orthostatic hypotensive risk in a Chinese population.
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Affiliation(s)
- N Lu
- The Pediatric Cardiology, The First Hospital of Jilin University, Changchun, China
| | - J Chen
- Hypertension Division, The Sino-German Laboratory of Molecular Medicine, Cardiovascular Institute and FuWai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Y Yuan
- The Anesthesiology Department, The First Hospital of Jilin University, Changchun, China
| | - X Cong
- The Cardiovascular Center, The First Hospital of Jilin University, Changchun, China
| | - Y Yang
- The Cardiovascular Center, The First Hospital of Jilin University, Changchun, China
| | - L Meng
- The Cardiovascular Center, The First Hospital of Jilin University, Changchun, China
| | - K Sun
- Hypertension Division, The Sino-German Laboratory of Molecular Medicine, Cardiovascular Institute and FuWai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - R Hui
- Hypertension Division, The Sino-German Laboratory of Molecular Medicine, Cardiovascular Institute and FuWai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Y Zheng
- The Cardiovascular Center, The First Hospital of Jilin University, Changchun, China
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23
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Liu G, Wang L, Pang T, Zhu D, Xu Y, Wang H, Cong X, Liu Y. Umbilical cord-derived mesenchymal stem cells regulate thymic epithelial cell development and function in Foxn1(-/-) mice. Cell Mol Immunol 2014; 11:275-84. [PMID: 24561455 DOI: 10.1038/cmi.2013.69] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Revised: 12/16/2013] [Accepted: 12/18/2013] [Indexed: 01/09/2023] Open
Abstract
Thymic microenvironments are essential for the maturation of thymocytes, which can be anatomically compartmentalized into cortical and medullar regions. The absence of the gene encoding the transcription factor forkhead box n1 (Foxn1) causes epithelial differentiation to stall in the precursor stage, resulting in the formation of an abnormal thymus. In this study, we used human umbilical cord-derived mesenchymal stem cells (UC-MSCs) to treat Foxn1(-/-) mice, and then analyzed the maturation and distribution of thymic epithelial cells in the Foxn1(-/-) thymic rudiment and the thymopoiesis of this newly developed rudiment. Our data showed a well-organized cortex-medulla architecture and an obvious improvement in the maturation of thymic epithelial cells along with the appearance of UEA-1(+)MHCII(hi) thymic epithelial cells in the rudiment. We further demonstrated improved thymopoiesis and the enhanced export of mature T cells with increased numbers of regulatory T cells into the peripheral blood. Furthermore, we observed that MSCs can engraft into thymic tissue and express many cytokines or proteins, particularly keratinocyte growth factor (KGF) and CD248, which are essential for thymic development. Collectively, our data identified a new mechanism for MSCs, which may provide a proper microenvironment for the reconstitution and functional maturation of the thymus in Foxn1(-/-) mice. Additionally, we elicited additional insights into the therapeutic efficacy of MSCs in several autoimmune diseases.
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Affiliation(s)
- Guangyang Liu
- 1] Key Laboratory of Systems Bioengineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China [2] Alliancells Institute of Stem Cells and Translational Regenerative Medicine, Tianjin, China
| | - Lihua Wang
- The State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases, Graduate School of Chinese Academy of Medical Sciences and Peking Union of Medical College, Tianjin, China
| | - Tianxiang Pang
- The State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases, Graduate School of Chinese Academy of Medical Sciences and Peking Union of Medical College, Tianjin, China
| | - Delin Zhu
- Alliancells Institute of Stem Cells and Translational Regenerative Medicine, Tianjin, China
| | - Yi Xu
- Alliancells Institute of Stem Cells and Translational Regenerative Medicine, Tianjin, China
| | - Hanyu Wang
- Alliancells Institute of Stem Cells and Translational Regenerative Medicine, Tianjin, China
| | - Xiuli Cong
- 1] Alliancells Institute of Stem Cells and Translational Regenerative Medicine, Tianjin, China [2] University of Florida, Department of Medicine, Gainesville, FL, USA
| | - Yongjun Liu
- Alliancells Institute of Stem Cells and Translational Regenerative Medicine, Tianjin, China
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24
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Jiang P, Mukthavaram R, Mukthavavam R, Chao Y, Bharati IS, Fogal V, Pastorino S, Cong X, Nomura N, Gallagher M, Abbasi T, Vali S, Pingle SC, Makale M, Kesari S. Novel anti-glioblastoma agents and therapeutic combinations identified from a collection of FDA approved drugs. J Transl Med 2014; 12:13. [PMID: 24433351 PMCID: PMC3898565 DOI: 10.1186/1479-5876-12-13] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [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: 12/25/2013] [Accepted: 01/10/2014] [Indexed: 01/23/2023] Open
Abstract
Background Glioblastoma (GBM) is a therapeutic challenge, associated with high mortality. More effective GBM therapeutic options are urgently needed. Hence, we screened a large multi-class drug panel comprising the NIH clinical collection (NCC) that includes 446 FDA-approved drugs, with the goal of identifying new GBM therapeutics for rapid entry into clinical trials for GBM. Methods Screens using human GBM cell lines revealed 22 drugs with potent anti-GBM activity, including serotonergic blockers, cholesterol-lowering agents (statins), antineoplastics, anti-infective, anti-inflammatories, and hormonal modulators. We tested the 8 most potent drugs using patient-derived GBM cancer stem cell-like lines. Notably, the statins were active in vitro; they inhibited GBM cell proliferation and induced cellular autophagy. Moreover, the statins enhanced, by 40-70 fold, the pro-apoptotic activity of irinotecan, a topoisomerase 1 inhibitor currently used to treat a variety of cancers including GBM. Our data suggest that the mechanism of action of statins was prevention of multi-drug resistance protein MDR-1 glycosylation. This drug combination was synergistic in inhibiting tumor growth in vivo. Compared to animals treated with high dose irinotecan, the drug combination showed significantly less toxicity. Results Our data identifies a novel combination from among FDA-approved drugs. In addition, this combination is safer and well tolerated compared to single agent irinotecan. Conclusions Our study newly identifies several FDA-approved compounds that may potentially be useful in GBM treatment. Our findings provide the basis for the rational combination of statins and topoisomerase inhibitors in GBM.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | - Santosh Kesari
- Translational Neuro-Oncology Laboratories, Moores Cancer Center, UC San Diego, La Jolla, CA 92093, USA.
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25
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Abstract
Autologous transplantation of the submandibular gland is an effective treatment for severe dry eye syndrome. However, more than 40% of patients experience epiphora 3 to 6 months after transplantation. The underlying mechanism of epiphora remains to be elucidated. To investigate the potential roles of muscarinic acetylcholine receptors (mAChRs) in the induction of epiphora in transplanted glands, we assessed and found elevated mRNA and protein expression of M1- and M3-mAChR in transplanted glands from epiphora patients. The content of inositol 1, 4, 5-trisphosphate was also elevated. Moreover, carbachol (5 and 10 µM) induced greater increase of [Ca(2+)]i in isolated epiphora submandibular cells than in controls. Although aquaporin-5 (AQP5) content and distribution in the apical and lateral plasma of epiphora glands did not change, AQP5 content was reduced in lipid microdomains (lipid rafts and caveolae) but increased in non-lipid microdomains compared with controls. Carbachol (10 µM) increased the ratio of non-lipid microdomain to total AQP5 in the cultured control submandibular gland tissue. Taken together, these results indicated that hypersensitive mAChRs might be involved in the epiphora of transplanted submandibular glands by modulating AQP5 trafficking.
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Affiliation(s)
- C Ding
- Center Laboratory and Center for Salivary Gland Diseases, Peking University School and Hospital of Stomatology, 22 Zhong Guan Cun South St., Beijing, 100081, P.R. China
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26
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Wang L, Wang L, Cong X, Liu G, Zhou J, Bai B, Li Y, Bai W, Li M, Ji H, Zhu D, Wu M, Liu Y. Human Umbilical Cord Mesenchymal Stem Cell Therapy for Patients with Active Rheumatoid Arthritis: Safety and Efficacy. Stem Cells Dev 2013; 22:3192-202. [PMID: 23941289 DOI: 10.1089/scd.2013.0023] [Citation(s) in RCA: 165] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Affiliation(s)
- Liming Wang
- Cell Therapy Center, 323 Hospital of Chinese People's Liberation Army, Xi'an city, China
| | - Lihua Wang
- The State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Diseases, Graduate School of Chinese Academy of Medical Sciences and Peking Union of Medical College, Tianjin, China
| | - Xiuli Cong
- Alliancells Institute of Stem Cells and Translational Regenerative Medicine of Zhongyuan Union Stem Cell Bioengineering Co. Ltd, Tianjin, China
| | - Guangyang Liu
- Alliancells Institute of Stem Cells and Translational Regenerative Medicine of Zhongyuan Union Stem Cell Bioengineering Co. Ltd, Tianjin, China
| | - Jianjun Zhou
- Cell Therapy Center, 323 Hospital of Chinese People's Liberation Army, Xi'an city, China
| | - Bin Bai
- Cell Therapy Center, 323 Hospital of Chinese People's Liberation Army, Xi'an city, China
| | - Yang Li
- Cell Therapy Center, 323 Hospital of Chinese People's Liberation Army, Xi'an city, China
| | - Wen Bai
- Cell Therapy Center, 323 Hospital of Chinese People's Liberation Army, Xi'an city, China
| | - Ming Li
- Cell Therapy Center, 323 Hospital of Chinese People's Liberation Army, Xi'an city, China
| | - Haijie Ji
- Alliancells Institute of Stem Cells and Translational Regenerative Medicine of Zhongyuan Union Stem Cell Bioengineering Co. Ltd, Tianjin, China
| | - Delin Zhu
- Alliancells Institute of Stem Cells and Translational Regenerative Medicine of Zhongyuan Union Stem Cell Bioengineering Co. Ltd, Tianjin, China
| | - Mingyuan Wu
- Harold Hamm Diabetes Center and Section of Endocrinology and Diabetes in the Department of Internal Medicine, and Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
- School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Yongjun Liu
- Alliancells Institute of Stem Cells and Translational Regenerative Medicine of Zhongyuan Union Stem Cell Bioengineering Co. Ltd, Tianjin, China
- School of Life Sciences and Technology, Tongji University, Shanghai, China
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27
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Su YC, Xiang RL, Zhang Y, Ding C, Cong X, Guo XH, Yang NY, Hua H, Wu LL, Yu GY. Decreased submandibular adiponectin is involved in the progression of autoimmune sialoadenitis in non-obese diabetic mice. Oral Dis 2013; 20:744-55. [PMID: 24134190 DOI: 10.1111/odi.12197] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2013] [Revised: 09/29/2013] [Accepted: 10/12/2013] [Indexed: 12/20/2022]
Abstract
OBJECTIVE To investigate a possible role of adiponectin in the pathogenesis of autoimmune sialoadenitis in non-obese diabetic (NOD) mouse model of Sjögren's syndrome. MATERIALS AND METHODS Expression of adiponectin and its receptors (AdipoR1/2) was detected by PCR, immunoblotting, or immunofluorescence. The level of adiponectin was quantified by ELISA. Adiponectin-related signaling molecules and pro-inflammatory cytokines were examined by PCR or immunoblotting. Apoptosis was evaluated by TUNEL staining, flow cytometry, and caspase 3 activation. RESULTS Adiponectin and AdipoR1/2 mRNA and protein were expressed in submandibular glands. Adiponectin immunostaining was widely diffused in the cytoplasm of acinar and ductal cells. AdipoR1 was mainly distributed in acinar cytoplasm, while AdipoR2 was predominantly located at acinar cell membrane. Submandibular adiponectin levels were reduced during the progression of autoimmune sialoadenitis in 7-, 14-, and 21-week-old NOD mice, while AdipoR1/2 levels were unchanged. The levels of phosphorylated adenosine monophosphate-activated protein kinase, extracellular signal-regulated kinase 1/2, and p38 mitogen-activated protein kinase were decreased, while interferon (IFN)-γ and glandular apoptosis were temporally increased at all time points. Moreover, exogenous adiponectin supplement inhibited, whereas neutralizing endogenous adiponectin by its antibody promoted IFN-γ-induced apoptosis and caspase 3 activation in cultured submandibular acinar cells. CONCLUSIONS Adiponectin plays a protective role on submandibular cells. Decreased adiponectin might promote glandular destruction in autoimmune sialoadenitis.
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Affiliation(s)
- Y-C Su
- Department of Physiology and Pathophysiology, Center for Salivary Gland Diseases of Peking University School and Hospital of Stomatology, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, Peking University Health Science Center, Beijing, China
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28
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Wang H, Zhao T, Xu F, Li Y, Wu M, Zhu D, Cong X, Liu Y. How important is differentiation in the therapeutic effect of mesenchymal stromal cells in liver disease? Cytotherapy 2013; 16:309-18. [PMID: 24239106 DOI: 10.1016/j.jcyt.2013.07.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Revised: 07/23/2013] [Accepted: 07/29/2013] [Indexed: 12/17/2022]
Abstract
BACKGROUND AIMS The protocols for differentiation of hepatocyte-like cells (HLCs) from mesenchymal stromal cells (MSCs) have been well established. Previous data have shown that MSCs and their derived HLCs were able to engraft injured liver and alleviate injuries induced by carbon tetrachloride. The goal of the current study was to determine the differences of MSCs and their derived HLCs in terms of therapeutic functions in liver diseases. METHODS After hepatic differentiation of umbilical cord-derived MSCs in vitro, we detected both MSC and HLC expressions of adhesion molecules and chemokine receptor CXCR4 by flow cytometry; immunosuppressive potential and hepatocyte growth factor expression were determined by means of enzyme-linked immunosorbent assay. We compared the therapeutic effect for fulminant hepatic failure in a mouse model. RESULTS MSC-derived-HLCs expressed lower levels of hepatocyte growth factor, accompanied by impaired immunosuppression in comparison with MSCs. Furthermore, undifferentiated MSCs showed rescuing potentials superior to those in HLCs for the treatment of fulminant hepatic failure. CONCLUSIONS After differentiation, HLCs lost several major properties in comparison with undifferentiated MSCs, which are beneficial for their application in liver diseases. Undifferentiated MSCs may be more appropriate than are HLCs for the treatment of liver diseases.
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Affiliation(s)
- Hanyu Wang
- Alliancells Institute of Stem Cells and Translational Regenerative Medicine, Tianjin, China
| | - Tingting Zhao
- Alliancells Institute of Stem Cells and Translational Regenerative Medicine, Tianjin, China
| | - Fang Xu
- Alliancells Institute of Stem Cells and Translational Regenerative Medicine, Tianjin, China
| | - Yan Li
- Alliancells Institute of Stem Cells and Translational Regenerative Medicine, Tianjin, China
| | - Mingyuan Wu
- Alliancells Institute of Stem Cells and Translational Regenerative Medicine, Tianjin, China; Beijing Alliancells-PuRui Bioscience Co, Ltd, Beijing, China; University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Delin Zhu
- Alliancells Institute of Stem Cells and Translational Regenerative Medicine, Tianjin, China
| | - Xiuli Cong
- Alliancells Institute of Stem Cells and Translational Regenerative Medicine, Tianjin, China; University of Florida, Department of Medicine, Gainesville, Florida, USA
| | - Yongjun Liu
- Alliancells Institute of Stem Cells and Translational Regenerative Medicine, Tianjin, China.
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29
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He C, Cong X, Zhang R, Wu D, An C, Zhao Z. Regulation of circadian locomotor rhythm by neuropeptide Y-like system in Drosophila melanogaster. Insect Mol Biol 2013; 22:376-388. [PMID: 23614491 DOI: 10.1111/imb.12027] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Circadian rhythms in behaviour and physiology exist widely in animals, plants, fungi and cyanobacteria. Although much work has been carried out to characterize the endogenous clock circuit, the output signals coupling the circadian pacemaker to behaviour and physiology remain elusive. Here, we show that neuropeptide F (NPF), a homologue of mammalian neuropeptide Y, and its G protein-coupled receptor NPFR1 regulate the locomotor rhythm in Drosophila melanogaster. Flies with loss of function in NPF or NPFR1 were unable to ramp up their activity before lights off under light : dark (LD) cycles, and oscillations in npf/NPF and npfr1/NPFR1 were found to correlate temporally with the locomotor rhythm. Furthermore, NPF is expressed in clock neurones including dorsolateral neurones (LNd s) and ventrolateral neurones (LNv s), whereas NPFR1 is expressed in dorsal neurone 1 (DN1) and LNd s. These results show that NPF signalling is involved in the circadian locomotor rhythm in LD cycles.
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Affiliation(s)
- C He
- College of Agriculture and Biotechnology, China Agricultural University, Beijing, China
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30
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Xu S, Ge R, Xu W, Cong X, Xie C, Gong H. SU-E-T-155: RapidArc Delivery Performance Using EDR2 Film and EPID Measurement. Med Phys 2013. [DOI: 10.1118/1.4814590] [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: 11/07/2022] Open
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31
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Burkart C, Arimoto KI, Tang T, Cong X, Xiao N, Liu YC, Kotenko SV, Ellies LG, Zhang DE. Usp18 deficient mammary epithelial cells create an antitumour environment driven by hypersensitivity to IFN-λ and elevated secretion of Cxcl10. EMBO Mol Med 2013; 5:1035-50. [PMID: 23681607 PMCID: PMC3721472 DOI: 10.1002/emmm.201201864] [Citation(s) in RCA: 64] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2012] [Revised: 04/04/2013] [Accepted: 04/05/2013] [Indexed: 12/31/2022] Open
Abstract
The theory of cancer immunoediting refers to mechanisms by which the immune system can suppress or promote tumour progression. A major challenge for the development of novel cancer immunotherapies is to find ways to exploit the immune system's antitumour activity while concomitantly reducing its protumour activity. Using the PyVmT model of mammary tumourigenesis, we show that lack of the Usp18 gene significantly inhibits tumour growth by creating a tumour-suppressive microenvironment. Generation of this antitumour environment is driven by elevated secretion of the potent T-cell chemoattractant Cxcl10 by Usp18 deficient mammary epithelial cells (MECs), which leads to recruitment of Th1 subtype CD4+ T cells. Furthermore, we show that Cxcl10 upregulation in MECs is promoted by interferon-λ and that Usp18 is a novel inhibitor of interferon-λ signalling. Knockdown of the interferon-λ specific receptor subunit IL-28R1 in Usp18 deficient MECs dramatically enhances tumour growth. Taken together, our data suggest that targeting Usp18 may be a viable approach to boost antitumour immunity while suppressing the protumour activity of the immune system.
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Affiliation(s)
- Christoph Burkart
- Moores Cancer Center, University of California San Diego, La Jolla, CA, USA
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32
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Hamid H, Kasasbeh AS, Suleiman MJ, Cong X, Liu H, Mohiuddin S, Bahou YG. Neuropsychiatric symptoms, seizure severity, employment, and quality of life of Jordanians with epilepsy. Epilepsy Behav 2013; 27:272-5. [PMID: 23452703 DOI: 10.1016/j.yebeh.2013.01.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [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: 04/24/2012] [Revised: 12/27/2012] [Accepted: 01/12/2013] [Indexed: 11/19/2022]
Abstract
RATIONALE Depression and anxiety are more strongly associated with quality of life (QOL) than seizure frequency in several populations with epilepsy. However, QOL is culturally determined and may be influenced by cultural values and norms as well as local policies and resources. The goal of this study is to investigate the impact of neuropsychiatric symptoms and seizure severity on QOL and employment in people with epilepsy living in Jordan. METHODS Seizure severity and complications, antiepileptic drug side effects, social stigma, neuropsychiatric symptoms, and mental health (MH-SF36) and physical health (PH-SF36) domains of QOL were assessed in 45 adult patients with epilepsy in a university neurology clinic. Multivariate regression analysis was used to evaluate the relationship between these variables and the quality of life of Jordanians with epilepsy. RESULTS Neuropsychiatric symptoms, seizure frequency, and history of injury due to seizure were associated with the MH-SF36. However, earlier age of seizure onset, longer duration of epilepsy, unemployment, and history of chronic disease was associated with lower PH-SF36 scores. Furthermore, there were no differences in QOL, neuropsychiatric symptoms, and seizure frequency in Jordanians who were employed versus unemployed in this study. CONCLUSIONS Neuropsychiatric symptoms were significantly associated with mental health-related QOL measures, but not with physically-related QOL measures, in Jordanians with epilepsy. For studies across populations, it is critical to separate mental health from physical health QOL measures. Furthermore, regional differences in culture and policy may more strongly influence employment status than individuals' experiences of epilepsy, neuropsychiatric symptoms, or QOL in some populations.
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Affiliation(s)
- H Hamid
- Yale School of Medicine, New Haven, CT, USA.
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33
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Lo MC, Peterson LF, Yan M, Cong X, Jin F, Shia WJ, Matsuura S, Ahn EY, Komeno Y, Ly M, Ommen HB, Chen IM, Hokland P, Willman CL, Ren B, Zhang DE. Combined gene expression and DNA occupancy profiling identifies potential therapeutic targets of t(8;21) AML. Blood 2012; 120:1473-84. [PMID: 22740448 PMCID: PMC3423785 DOI: 10.1182/blood-2011-12-395335] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2011] [Accepted: 06/16/2012] [Indexed: 12/24/2022] Open
Abstract
Chromosome translocation 8q22;21q22 [t(8;21)] is commonly associated with acute myeloid leukemia (AML), and the resulting AML1-ETO fusion proteins are involved in the pathogenesis of AML. To identify novel molecular and therapeutic targets, we performed combined gene expression microarray and promoter occupancy (ChIP-chip) profiling using Lin(-)/Sca1(-)/cKit(+) cells, the major leukemia cell population, from an AML mouse model induced by AML1-ETO9a (AE9a). Approximately 30% of the identified common targets of microarray and ChIP-chip assays overlap with the human t(8;21)-gene expression molecular signature. CD45, a protein tyrosine phosphatase and a negative regulator of cytokine/growth factor receptor and JAK/STAT signaling, is among those targets. Its expression is substantially down-regulated in leukemia cells. Consequently, JAK/STAT signaling is enhanced. Re-expression of CD45 suppresses JAK/STAT activation, delays leukemia development, and promotes apoptosis of t(8;21)-positive cells. This study demonstrates the benefit of combining gene expression and promoter occupancy profiling assays to identify molecular and potential therapeutic targets in human cancers and describes a previously unappreciated signaling pathway involving t(8;21) fusion proteins, CD45, and JAK/STAT, which could be a potential novel target for treating t(8;21) AML.
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MESH Headings
- Animals
- Antineoplastic Agents/therapeutic use
- Cell Line, Tumor
- Cell Transformation, Neoplastic/genetics
- Cell Transformation, Neoplastic/pathology
- Chromatin Immunoprecipitation
- Chromosomes, Human, Pair 21/genetics
- Chromosomes, Human, Pair 8/genetics
- DNA, Neoplasm/metabolism
- Enzyme Activation
- Gene Expression Profiling
- Gene Expression Regulation, Leukemic
- Gene Regulatory Networks/genetics
- Genes, Neoplasm/genetics
- Humans
- Janus Kinases/metabolism
- Leukemia, Myeloid, Acute/drug therapy
- Leukemia, Myeloid, Acute/genetics
- Leukocyte Common Antigens/metabolism
- Mice
- Oligonucleotide Array Sequence Analysis
- Promoter Regions, Genetic/genetics
- Reproducibility of Results
- STAT Transcription Factors/metabolism
- Signal Transduction/genetics
- Translocation, Genetic
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Affiliation(s)
- Miao-Chia Lo
- Moores Cancer Center, University of California-San Diego, La Jolla, CA 92093, USA
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Hamid H, Liu H, Cong X, Devinsky O, Berg AT, Vickrey BG, Sperling MR, Shinnar S, Langfitt JT, Walczak TS, Barr WB, Dziura J, Bazil CW, Spencer SS. Long-term association between seizure outcome and depression after resective epilepsy surgery. Neurology 2011; 77:1972-6. [PMID: 22094480 DOI: 10.1212/wnl.0b013e31823a0c90] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE This study explored the association between long-term epilepsy surgery outcome and changes in depressive symptoms. METHODS Adults were enrolled between 1996 and 2001 in a multicenter prospective study to evaluate outcomes of resective epilepsy surgery. The extent of depressive symptoms and depression case status (none, mild, or moderate/severe) were assessed using the Beck Depression Inventory (BDI) preoperatively and 3, 12, 24, 48, and 60 months postoperatively. A mixed-model repeated-measures analysis was performed, adjusting for covariates of seizure location, gender, age, race, education, and seizure control. RESULTS Of the total 373 subjects, 256 were evaluated at baseline and 5 years after surgery. At baseline, 164 (64.1%) were not depressed, 34 (13.3%) were mildly depressed, and 58 (22.7%) had moderate to severe depression. After 5 years, 198 (77.3%) were not depressed, 20 (7.8%) were mildly depressed, and 38 (14.8%) were moderately to severely depressed. Five years after surgery, the reduction in mean change from baseline in BDI score was greater in subjects with excellent seizure control than in the fair and poor seizure control groups (p = 0.0006 and p = 0.02 respectively). Those with good seizure control had a greater reduction in BDI score than the poor seizure control group (p = 0.02) and borderline significant reduction compared with the fair seizure control group (p = 0.055). CONCLUSION Although study participants had initial improvement in depressive symptoms, on average, after resective surgery, only patients with good or excellent seizure control had sustained long-term improvement in mood.
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Affiliation(s)
- H Hamid
- Yale University School of Medicine, Department of Neurology, 950 Campbell Ave., West Haven, CT 06516-2700, USA.
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Maragno AL, Pironin M, Alcalde H, Cong X, Knobeloch KP, Tangy F, Zhang DE, Ghysdael J, Quang CT. ISG15 modulates development of the erythroid lineage. PLoS One 2011; 6:e26068. [PMID: 22022510 PMCID: PMC3192153 DOI: 10.1371/journal.pone.0026068] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2011] [Accepted: 09/19/2011] [Indexed: 11/24/2022] Open
Abstract
Activation of erythropoietin receptor allows erythroblasts to generate erythrocytes. In a search for genes that are up-regulated during this differentiation process, we have identified ISG15 as being induced during late erythroid differentiation. ISG15 belongs to the ubiquitin-like protein family and is covalently linked to target proteins by the enzymes of the ISGylation machinery. Using both in vivo and in vitro differentiating erythroblasts, we show that expression of ISG15 as well as the ISGylation process related enzymes Ube1L, UbcM8 and Herc6 are induced during erythroid differentiation. Loss of ISG15 in mice results in decreased number of BFU-E/CFU-E in bone marrow, concomitant with an increased number of these cells in the spleen of these animals. ISG15(-/-) bone marrow and spleen-derived erythroblasts show a less differentiated phenotype both in vivo and in vitro, and over-expression of ISG15 in erythroblasts is found to facilitate erythroid differentiation. Furthermore, we have shown that important players of erythroid development, such as STAT5, Globin, PLC γ and ERK2 are ISGylated in erythroid cells. This establishes a new role for ISG15, besides its well-characterized anti-viral functions, during erythroid differentiation.
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Affiliation(s)
- Ana Leticia Maragno
- CNRS (Centre National de la Recherche Scientifique) UMR3306, Orsay, France
- INSERM (Institut National de la Santé et de la Recherche Médicale) U1005, Orsay, France
- Institut Curie, Centre Universitaire, Bat 110 91405, Orsay, France
| | - Martine Pironin
- CNRS (Centre National de la Recherche Scientifique) UMR3306, Orsay, France
- INSERM (Institut National de la Santé et de la Recherche Médicale) U1005, Orsay, France
- Institut Curie, Centre Universitaire, Bat 110 91405, Orsay, France
| | - Hélène Alcalde
- CNRS (Centre National de la Recherche Scientifique) UMR3306, Orsay, France
- INSERM (Institut National de la Santé et de la Recherche Médicale) U1005, Orsay, France
- Institut Curie, Centre Universitaire, Bat 110 91405, Orsay, France
| | - Xiuli Cong
- University of California San Diego, Moores University of California San Diego Cancer Center, La Jolla, California, United States of America
| | | | - Frederic Tangy
- Unité de Génomique Virale et Vaccination, CNRS URA-3015, Institut Pasteur, Paris, France
| | - Dong-Er Zhang
- University of California San Diego, Moores University of California San Diego Cancer Center, La Jolla, California, United States of America
| | - Jacques Ghysdael
- CNRS (Centre National de la Recherche Scientifique) UMR3306, Orsay, France
- INSERM (Institut National de la Santé et de la Recherche Médicale) U1005, Orsay, France
- Institut Curie, Centre Universitaire, Bat 110 91405, Orsay, France
| | - Christine Tran Quang
- CNRS (Centre National de la Recherche Scientifique) UMR3306, Orsay, France
- INSERM (Institut National de la Santé et de la Recherche Médicale) U1005, Orsay, France
- Institut Curie, Centre Universitaire, Bat 110 91405, Orsay, France
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Cong X, Reuter B, Yan M, Zhang DE. SS11-2 ISG15 and protein ISGylation. Cytokine 2010. [DOI: 10.1016/j.cyto.2010.07.333] [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: 10/19/2022]
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Zhang Y, Cong X, Shi L, Xiang B, Li YM, Ding QW, Ding C, Wu LL, Yu GY. Activation of transient receptor potential vanilloid subtype 1 increases secretion of the hypofunctional, transplanted submandibular gland. Am J Physiol Gastrointest Liver Physiol 2010; 299:G54-62. [PMID: 20360133 DOI: 10.1152/ajpgi.00528.2009] [Citation(s) in RCA: 25] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Hyposecretion occurs in most patients early after submandibular gland autotransplantation for severe keratoconjunctivitis sicca. Endogenous transient receptor potential vanilloid subtype 1 (TRPV1) has been recently demonstrated in rabbit submandibular glands, and activation of TRPV1 by capsaicin increases secretion in isolated glands, but the TRPV1-mediated secretory mechanism remains to be elucidated. The purpose of this study was to verify whether activation of TRPV1 by capsaicin could improve the secretion of transplanted gland and its underlying mechanism. The salivary flow of the transplanted glands was significantly decreased, and the mRNA and protein levels of TRPV1 and aquaporin 5 (AQP5) were downregulated in the transplanted glands. Topical capsaicin cream increased secretion and upregulated levels of TRPV1 and AQP5 in transplanted glands. Moreover, in cultured submandibular gland cells, capsaicin increased the mRNA expression of AQP5 and led to redistribution of AQP5 from the cytoplasm to the plasma membrane via TRPV1 activation. Capsaicin enhanced the phosphorylation of extracellular signal-regulated kinase (ERK). Preincubation of cells with PD98059, an inhibitor of ERK kinase, suppressed the capsaicin-induced mRNA expression of AQP5. In summary, the capsaicin-induced secretory mechanism involved activation of TRPV1 and upregulation of AQP5 in an ERK-dependent manner and promoted the redistribution of AQP5 in submandibular gland cells. Activation of TRPV1 may provide a new therapeutic strategy to improve submandibular gland hypofunction.
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Affiliation(s)
- Y Zhang
- Department of Physiology and Pathophysiology, Peking University Health Science Center and Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, Beijing, 100191, P.R. China.
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Cong X, Yan M, Yin X, Zhang DE. Hematopoietic cells from Ube1L-deficient mice exhibit an impaired proliferation defect under the stress of bone marrow transplantation. Blood Cells Mol Dis 2010; 45:103-11. [PMID: 20591702 DOI: 10.1016/j.bcmd.2010.05.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2010] [Accepted: 05/13/2010] [Indexed: 12/14/2022]
Abstract
Following bone marrow transplantation, donor stem cells are recruited from their quiescent status to promote the rapid reconstitution in recipients. This dynamic process is tightly regulated by a complex of internal and external signals. Protein modification by the ubiquitin like modifier ISG15 (ISGylation) is strongly induced by type I interferons (IFNs). There are higher levels of type I IFNs and protein ISGylation in the bone marrow of recipients shortly after transplantation. In order to clarify the physiological function of protein ISGylation, we generated a mouse model that lacks protein ISGylation due to deficiency of ISG15 conjugating enzyme Ube1L (Ube1L(-/-)). In this report, we focused on the analysis of the hematopoietic system in Ube1L(-)(/)(-) mice in steady-state hematopoiesis and its potential protective role during bone marrow reconstitution. Here we demonstrated that In Ube1L(-/-) mice, steady-state hematopoiesis was unperturbed. However, transplantation experiment revealed a 50% reduction in repopulation potential of Ube1L-deficient cells at 3weeks posttransplantation, but no differences at 6 and 12weeks. A competitive transplantation experiment magnified and extended this phenotype. Cell cycle analysis revealed that under the condition with high levels of IFNs and protein ISGylation, the Ube1L deficiency can cause G2/M phase block of cell cycle in hematopoietic multipotential progenitors. These observations indicate that although protein ISGylation is dispensable for steady-state hematopoiesis, it plays a significant role during interferon related stress response, such as bone marrow transplantation.
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Affiliation(s)
- Xiuli Cong
- Moores UCSD Cancer Center, University of California San Diego, La Jolla, 92093, USA
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39
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Shi L, Cong X, Zhang Y, Ding C, Ding QW, Fu FY, Wu LL, Yu GY. Carbachol improves secretion in the early phase after rabbit submandibular gland transplantation. Oral Dis 2010; 16:351-9. [DOI: 10.1111/j.1601-0825.2009.01633.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [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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40
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Affiliation(s)
- Xiaoyan Yin
- Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA
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41
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Deng L, Hu S, Baydoun AR, Chen J, Chen X, Cong X. Aspirin induces apoptosis in mesenchymal stem cells requiring Wnt/beta-catenin pathway. Cell Prolif 2009; 42:721-30. [PMID: 19706045 DOI: 10.1111/j.1365-2184.2009.00639.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Mesenchymal stem cells (MSC) are multipotent progenitor cells that are have found use in regenerative medicine. We have previously observed that aspirin, a widely used anti-inflammatory drug, inhibits MSC proliferation. Here we have aimed to elucidate whether aspirin induces MSC apoptosis and whether this is modulated through the Wnt/beta-catenin pathway. MATERIALS AND METHODS Apoptosis of MSCs was assessed using Hoechst 33342 dye and an Annexin V-FITC/PI Apoptosis Kit. Expression of protein and protein phosphorylation were investigated using Western blot analysis. Caspase-3 activity was detected by applying a caspase-3/CPP32 Colorimetric Assay Kit. RESULTS In these MSCs, aspirin induced morphological changes characteristic of apoptosis, cytochrome c release from mitochondria, and caspase-3 activation. Stimulating the Wnt/beta-catenin pathway by both Wnt 3a and GSK-3beta inhibitors (LiCl and SB 216763), blocked aspirin-induced apoptosis and protected mitochondrial function, as demonstrated by decreased cytochrome c release and caspase-3 activity. Aspirin initially caused a time-dependent decrease in COX-2 expression but subsequently, and unexpectedly, elevated the latter. Stimulation of COX-2 expression by aspirin was further enhanced following stimulation of the Wnt/beta-catenin pathway. Application of the COX-2 inhibitor NS-398 suppressed elevated COX-2 expression and promoted aspirin-induced apoptosis. CONCLUSION These results demonstrate that the Wnt/beta-catenin pathway is a key modulator of aspirin-induced apoptosis in MSCs by regulation of mitochrondrial/caspase-3 function. More importantly, our findings suggest that aspirin may influence MSC survival under certain conditions; therefore, it should be used with caution when considering regenerative MSC transplantation in patients with concomitant chronic inflammatory diseases such as arthritis.
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Affiliation(s)
- L Deng
- Research Center for Cardiovascular Regenerative Medicine, Ministry of Health, Cardiovascular Institute & Fu Wai Hospital, Chinese Academy of Medical Science & Peking Union Medicine College, Beijing 100037, China
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Li YM, Zhang Y, Shi L, Xiang B, Cong X, Zhang YY, Wu LL, Yu GY. Isoproterenol improves secretion of transplanted submandibular glands. J Dent Res 2009; 88:477-82. [PMID: 19493894 DOI: 10.1177/0022034509337114] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Autotransplantation of the submandibular gland is effective for severe keratoconjunctivitis sicca. However, most transplants show decreased secretion shortly after the operation, which leads to obstruction of Wharton's duct. The hypothesis that decreased catecholamine release due to denervation contributes to hypofunction in the early phase was tested in transplanted glands in rabbits. We found that salivary flow, expression of beta(1)- and beta(2)-adrenoceptor, and the maximum binding capacity were markedly decreased in the transplanted glands. Isoproterenol significantly reversed the decreased secretion, enhanced the expressions of beta(1)- and beta(2)-adrenoceptor, and ameliorated the atrophy of acinar cells. The contents of cAMP and phospho-ERK 1/2 were increased after isoproterenol treatment. These results indicate that lack of beta-adrenoceptor stimulation is involved in early dysfunction of the transplanted gland. Isoproterenol treatment moderates structural injury and improves secretory function in the transplanted submandibular gland through up-regulating beta(1)- and beta(2)-adrenoceptor expression and post-receptor signal transduction.
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Affiliation(s)
- Y M Li
- Department of Physiology and Pathophysiology, Peking University Health Science Centre and Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, Beijing 100191, China
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43
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Cong X, Zhang Y, Shi L, Wu L, Yu G. Activation of vanilloid receptor upregulates expression of tight junction protein zonula occludens-1, claudin-3 and claudin-11 in rabbit submandibular gland. Int J Oral Maxillofac Surg 2009. [DOI: 10.1016/j.ijom.2009.03.331] [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: 10/20/2022]
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44
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Yin X, Cong X, Yan M, Zhang DE. Deficiency of a potential 3p21.3 tumor suppressor gene UBE1L (UBA7) does not accelerate lung cancer development in K-rasLA2 mice. Lung Cancer 2008; 63:194-200. [PMID: 18571763 DOI: 10.1016/j.lungcan.2008.05.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2008] [Revised: 04/23/2008] [Accepted: 05/05/2008] [Indexed: 12/30/2022]
Abstract
Genetic lesions in chromosomal region 3p21.3 marks one of the earliest events in human lung cancer development. It is hypothesized that one or more tumor suppressor genes reside in this region. Identification and characterization of these genes are important for the understanding of lung cancer initiation. UBE1L (UBA7) is a long-suspected 3p21.3 residing tumor suppressor gene. It encodes the key enzyme that activates ISGylation, a novel, ubiquitination-like, post-translational protein modification system that is inducible by interferon. It has been implicated that ISGylation plays a variety of biological roles ranging from viral defense to tumor surveillance. Here we tested the possible function of ISGylation during lung cancer development by using the Ube1l-deficient mice and the K-ras(LA2) lung cancer mice. Protein ISGylation levels were largely unchanged during lung cancer progression. Ube1l deficiency neither altered the lung cancer progression nor affected the overall survival of K-ras(LA2) lung cancer mice. Our study suggests that Ube1l is not a tumor suppressor gene in K-ras(LA2) lung cancer mouse model. However, as described in the discussion, additional studies with other lung cancer mouse models will be necessary to elucidate the potential tumor suppressor function of UBE1L in K-RAS mutation independent human lung cancers.
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Affiliation(s)
- Xiaoyan Yin
- Department of Molecular and Experimental Medicine, Scripps Research Institute, La Jolla, CA 92037, USA
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45
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Zhan Y, Wang Y, Wei L, Chen H, Cong X, Fei R, Gao Y, Liu F. Differentiation of hematopoietic stem cells into hepatocytes in liver fibrosis in rats. Transplant Proc 2007; 38:3082-5. [PMID: 17112904 DOI: 10.1016/j.transproceed.2006.08.132] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2006] [Indexed: 12/12/2022]
Abstract
It has been reported that hematopoietic stem cells (HSC) can differentiate into hepatocytes in the normal liver and in some pathologic environments. The aim of this study was to investigate whether HSC can differentiate into hepatocytes in cases of established liver fibrosis. Rat liver fibrosis was induced by subcutaneous injection of tetrachloride (CCl4). Thy+ CD3- CD45RA- HSC in bone marrow cells, which had been enriched by fluorescence-activated cell sorting (FACS), were labeled with PKH26-GL, and autologously transplanted into CCl4-treated rats. The expressions of albumin (Alb), cytokeratin 8 (CK8), and alpha-smooth muscle actin (SMA) were determined by immunofluorescence methods. The PKH26-GL labeled Thy+ CD3- CD45RA- HSC expressed the hepatocyte-specific markers Alb and CK8, but did not express alpha-SMA in liver fibrosis. Thy+ CD3- CD45RA- HSC differentiated into hepatocytes, but not into hepatic stellate cells. In conclusion, autologous stem cell transplantation may be helpful to treat hepatic fibrosis.
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Affiliation(s)
- Y Zhan
- Peking University Hepatology Institute, Peking University People's Hospital, Beijing, China
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Liu F, Pan XB, Chen GD, Jiang D, Cong X, Fei R, Chen HS, Wei L. Hematopoietic stem cell mobilization after rat partial orthotopic liver transplantation. Transplant Proc 2006; 38:1603-9. [PMID: 16797365 DOI: 10.1016/j.transproceed.2006.02.121] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2005] [Indexed: 02/07/2023]
Abstract
BACKGROUND On the basis of the recently recognized potential of hematopoietic stem cells (HSC) to give rise to hepatocytes, we investigated the possibility that HSC could be mobilized and home to the injured liver promoting tissue repair after 50% partial orthotopic liver transplantation (PLTx) in the rat. METHODS Using sex-mismatched (female to male) syngeneic SD rats, we performed 50% PLTx or whole orthotopic liver transplantation (WLTx) versus 50% partial hepatectomy (PHx) and sham operation (O). Elements with stem cell markers were detected in peripheral blood (PB) and in the liver. Liver injury and regeneration were estimated. The sex-determining region for Y chromosome gene (SRY) was used to define cell origin by in situ hybridization in liver sections. RESULTS Comparison of WLTx and PHx groups showed a lower survival rate (50%), in the PLTx group were (P<.05). Further, the liver injury was more serious and the levels of serum biochemical parameters were higher. Compared with PHx groups, on days 3 and 5 postoperatively, the mitosis index and the expression of PCNA were lower among the PLTx groups. Compared with WLTx and sham operation groups, beta2m-/Thy-1.1+, CD34+ cells in PB in PLTx groups and PHx were increased on day 1 postoperatively and decreased on the following days. Compared with PHx groups, beta2m-/Thy-1.1+, CD34+ cells were higher in PLTx. The CD34-, c-kit-, and Thy-1.1-positive cells detected in portal tract areas peaked during 3 to 5 days postoperatively in PLTx. Few SRY+ cells were detected in PLTx liver grafts. CONCLUSIONS beta2m-/Thy-1.1+ and CD34+ stem cells mobilized after PLTx and PHx may be related to the reduced-size liver. Few HSC are involved in liver regeneration in PLTx.
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Affiliation(s)
- F Liu
- Hepatology Institute, Department of Gastroenterology, Peking University People's Hospital, Beijing, People's Republic of China
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Abstract
The oscillatory shear index (OSI) was developed based on the hypothesis that intimal hyperplasia was correlated with oscillatory shear stresses. However, the validity of the OSI was in question since the correlation between intimal thickness and the OSI at the side walls of the sinus in the Y-shaped model of the average human carotid bifurcation (Y-AHCB) was weak. The objectives of this paper are to examine whether the reason for the weak correlation lies in the deviation in geometry of Y-AHCB from real human carotid bifurcation, and whether this correlation is clearly improved in the tuning-fork-shaped model of the average human carotid bifurcation (TF-AHCB). The geometry of the TF-AHCB model was based on observation and statistical analysis of specimens from 74 cadavers. The flow fields in both models were studied and compared by using flow visualization methods under steady flow conditions and by using laser Doppler anemometer (LDA) under pulsatile flow conditions. The TF-shaped geometry leads to a more complex flow field than the Y-shaped geometry. This added complexity includes strengthened helical movements in the sinus, new flow separation zone, and directional changes in the secondary flow patterns. The results show that the OSI-values at the side walls of the sinus in the TF-shaped model were more than two times as large as those in the Y-shaped model. This study confirmed the stronger correlation between the OSI and intimal thickness in the tuning-fork geometry of human carotid bifurcation, and the TF-AHCB model is a significant improvement over the traditional Y-shaped model.
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Affiliation(s)
- Z Ding
- Department of Engineering Mechanics, Shanghai Jiaotong University, Shanghai 200030, China.
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Chen H, Cai S, Wang Y, Zhao H, Peng J, Pang X, Zhu J, Cong X, Rui J, Leng X, Du R, Wang Y, Vaughan H, Cebon J, Burgess AW, Chen W. Expression of the MAGE-1 gene in human hepatocellular carcinomas. Chin Med J (Engl) 2000; 113:1112-8. [PMID: 11776148] [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: 02/23/2023] Open
Abstract
OBJECTIVE To further investigate the expression of MAGE-1 gene in hepatocellular carcinoma (HCC). METHODS The tumors and adjacent liver tissue from 45 HCC patients and liver tissue from 28 non-HCC patients (16 with liver cirrhosis and 12 with normal liver) were characterized by RT-PCR. A 421 bp PCR product from a cDNA fragment spanning exons 1, 2 and 3 was sequenced. The HLA type was assayed by standard ELISA in 43 HCC patients. RESULTS Thirty-two of 45 tumor tissues from HCC patients expressed MAGE-1 mRNA (71.1%). In contrast, MAGE-1 mRNA was not detected in adjacent tissues. Three were found to have point mutations at 3 identical sites resulting in the substitution of two amino acid residues. The most frequent HLA types in 43 HCC patients were: HLA-A2, 53.5%; A11, 25.6%; A24, 20.9%; A33, 20.9%; HLA-B13, 28.3% and B35, 23.2%. Expression of HLA-A33 (20.9%) was higher in HCC patients than that predicted in the normal Chinese population (8.8%). There was no discemable correlation between MAGE-1 expression and alpha-FP level, tumor size and hepatitis B or C virus infection. The identification of peptides which are restricted by haploptypes other than A1 should increase the opportunity for peptide based immunotherapy. CONCLUSIONS This study shows that MAGE-1 mRNA is highly expressed in HCC tumor tissue in Chinese patients. Previously unreported point mutations in the MAGE-1 gene are described and may also provide additional opportunities for immunotherapy.
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MESH Headings
- Amino Acid Sequence
- Antigens, Neoplasm
- Base Sequence
- Binding Sites/genetics
- Carcinoma, Hepatocellular/genetics
- Carcinoma, Hepatocellular/pathology
- DNA, Complementary/chemistry
- DNA, Complementary/genetics
- Gene Expression Regulation, Neoplastic
- HLA Antigens/genetics
- HLA Antigens/metabolism
- Haplotypes
- Humans
- Liver Neoplasms/genetics
- Liver Neoplasms/pathology
- Melanoma-Specific Antigens
- Molecular Sequence Data
- Neoplasm Proteins/genetics
- Neoplasm Proteins/metabolism
- Protein Binding
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Sequence Analysis, DNA
- Tumor Cells, Cultured
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Affiliation(s)
- H Chen
- Hepatology Institute, People's Hospital, Peking University, Beijing 100044, China
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Qiu L, Cong X, Tan Y. [Application of microsatellite alteration of urine sediment in the early diagnosis of bladder cancer]. Zhonghua Zhong Liu Za Zhi 2000; 22:483-6. [PMID: 11235570] [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 assess the usefulness of microsatellite DNA sequence (MS) alterations in urine sediment for early diagnosis of human bladder cancer. METHODS Loss of heterozygosity(LOH) and microsatellite instability(MIN) in urine sediment from 28 cases of bladder cancer were detected by polymerase chain reaction (PCR) with selected primers of 10 microsatellite loci. The peripheral blood mononuclear cells and bladder carcinoma cells were used as controls. RESULTS In 24 of 28 bladder cancer patients (85.7%) LOH and MIN were found in urine sediment on at least one MS locus. Only in 3 of 28 patients(10.7%) was the urine cytology positive while MS and MIN were detected in these 3 patients. The conformance of MS alterations between cancer cells and urine sediment in the same patients was 94.1%. No MS alteration was found in 15 normal controls. CONCLUSION Application of microsatellite sequence of urine sediment can be considered as a new tool for screening and early diagnoses of bladder cancer.
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Affiliation(s)
- L Qiu
- Department of Immunology, Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing 100029, China
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