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Li H, Wu X, Bu D, Wang L, Xu X, Wang Y, Liu Y, Zhu P. Recombinant jurkat cells (HMGN2-T cells) secrete cytokines and inhibit the growth of tumor cells. J Mol Histol 2022; 53:741-751. [PMID: 35861945 DOI: 10.1007/s10735-022-10084-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 05/26/2022] [Indexed: 11/28/2022]
Abstract
High Mobility Group Chromosomal Protein N2 (HMGN2) can recognize tumor cells and enhance the anti-tumor effect of immune cells. This study aimed to establish a lentiviral vector of recombinant HMGN2 gene, establish recombinant T cells (HMGN2-T cells), and observe their anti-tumor effects. Total RNA was isolated from peripheral blood mononuclear cells. HMGN2, cluster of differentiation (CD) 8 A, CD28, CD137, and CD3ζ genes were amplified and connected. Jurkat cells were transfected with the recombinant lentivirus vector. The viability, apoptosis, and cell cycle of HMGN2-T cells were detected using Cell Counting Kit-8 assay and flow cytometry. The co-culture was performed by adding HMGN2-T cells to tumor cells with different effect-to-target (E:T) ratios. The cytotoxic activity was measured by lactate dehydrogenase (LDH) releasing assay. The sequences of HMGN2, CD8A, CD28, CD137, and CD3ζ gene plasmids were confirmed using gene sequencing. After the lentiviral transfection for 72 h, green fluorescence cells (HMGN2-T cells) could be seen. Cell viability and apoptosis were increased in HMGN2-T cells. The cytokine levels of interleukin 2 (IL-2) and tumor necrosis factor α (TNF-α) increased in cell supernatants of HMGN2-T cells. The percentage of G0/G1 phase cells was lower, the rate of S phase cells was higher in HMGN2-T cells than control cells. The co-culture of HMGN2-T cells and tumor cells could promote the cytokines' release. The LDH level was increased with the elevation of E:T ratios. In conclusion, the HMGN2-T cells were well-established and have the effect of secreting cytokines and killing tumor cells.
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Affiliation(s)
- Huanhuan Li
- Department of Pediatrics, First Affiliated Hospital of Zhengzhou University, No.1 East Jianshe Road, 450052, Zhengzhou, China
| | - Xueqiang Wu
- Institute of Hematology & Oncology, Beijing Aerospace General Hospital, 100076, Beijing, China
| | - Dingfang Bu
- Department of Hematology, Peking University First Hospital, No.8 Xishiku Street, Xicheng District, 100034, Beijing, China
| | - Lihua Wang
- Institute of Hematology & Oncology, Beijing Aerospace General Hospital, 100076, Beijing, China
| | - Xueju Xu
- Department of Pediatrics, First Affiliated Hospital of Zhengzhou University, No.1 East Jianshe Road, 450052, Zhengzhou, China
| | - Yingchao Wang
- Department of Pediatrics, First Affiliated Hospital of Zhengzhou University, No.1 East Jianshe Road, 450052, Zhengzhou, China
| | - Yufeng Liu
- Department of Pediatrics, First Affiliated Hospital of Zhengzhou University, No.1 East Jianshe Road, 450052, Zhengzhou, China.
| | - Ping Zhu
- Department of Hematology, Peking University First Hospital, No.8 Xishiku Street, Xicheng District, 100034, Beijing, China.
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Wang X, Wang R, Bu D, Wang L, Zhang Y, Chang Y, Zhang C, Chen X, Zhu X, Liu Z, Wang M. Paraneoplastic Pemphigus Autoantibodies Against C-terminus of Desmoplakin Induced Acantholysis In Vitro and In Vivo. Front Immunol 2022; 13:886226. [PMID: 35911677 PMCID: PMC9332891 DOI: 10.3389/fimmu.2022.886226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 06/17/2022] [Indexed: 11/13/2022] Open
Abstract
Paraneoplastic pemphigus (PNP) is an autoimmune bullous disease associated with underlying neoplasms and characterized by antibodies against desmoglein 3 (Dsg 3) and plakins. Autoantibodies against desmoglein 3 in sera of patients with PNP have been proven to cause acantholysis in vivo in neonatal mice. As a member of the plakin family, autoantibodies against desmoplakin were detected frequently by immunoprecipitation in the sera of PNP. The recombinant C-terminus of desmoplakin was expressed and purified to adsorb the specific autoantibodies against the C-terminus of desmoplakin. In vitro dispase-dependent keratinocyte dissociation assay and in vivo IgG passive transfer into neonatal mice assay were performed, followed by the electronic microscopy examination and TUNEL assay. We found that anti-C terminus of desmoplakin autoantibodies caused blisters and acantholysis in mice skin at a dose-dependent manner. Moreover, dissociated fragments were observed after incubation with the purified IgG against desmoplakin, compared with normal human IgG (P-value =0.0207). The electronic microscopy examination showed the disconnection of keratin intermediate filaments from desmosomes. Lastly, apoptosis of keratinocytes in the TUNEL assay was all detected in the skins of neonatal mice after injection of the anti-C terminus of desmoplakin autoantibodies. Taken together, the study suggests that autoantibodies against the C-terminus of desmoplakin might be pathogenic in PNP.
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Affiliation(s)
- Xue Wang
- Department of Dermatology, Peking University First Hospital, Beijing, China
- National Clinical Research Center for Skin and Immune Diseases, Beijing, China
- Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China
- Department of Dermatology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Rui Wang
- Department of Dermatology, Peking University First Hospital, Beijing, China
- National Clinical Research Center for Skin and Immune Diseases, Beijing, China
- Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China
| | - Dingfang Bu
- Central Laboratory, Peking University First Hospital, Beijing, China
| | - Leyi Wang
- Department of Dermatology, Peking University First Hospital, Beijing, China
- National Clinical Research Center for Skin and Immune Diseases, Beijing, China
- Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China
| | - Yuexin Zhang
- Department of Dermatology, Peking University First Hospital, Beijing, China
- National Clinical Research Center for Skin and Immune Diseases, Beijing, China
- Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China
| | - Yuan Chang
- Department of Dermatology, Peking University First Hospital, Beijing, China
- National Clinical Research Center for Skin and Immune Diseases, Beijing, China
- Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China
| | - Chenyang Zhang
- Department of Dermatology, Peking University First Hospital, Beijing, China
- Department of Dermatology, Central Hospital, Zhengzhou University, Zhengzhou, China
| | - Xixue Chen
- Department of Dermatology, Peking University First Hospital, Beijing, China
- National Clinical Research Center for Skin and Immune Diseases, Beijing, China
- Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China
| | - Xuejun Zhu
- Department of Dermatology, Peking University First Hospital, Beijing, China
- National Clinical Research Center for Skin and Immune Diseases, Beijing, China
- Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China
| | - Zhi Liu
- Department of Dermatology, University of North Carolina, Chapel Hill, NC, United States
| | - Mingyue Wang
- Department of Dermatology, Peking University First Hospital, Beijing, China
- National Clinical Research Center for Skin and Immune Diseases, Beijing, China
- Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China
- *Correspondence: Mingyue Wang,
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Guo S, Huang Z, Zhu J, Yue T, Wang X, Pan Y, Bu D, Liu Y, Wang P, Chen S. CBS-H 2S axis preserves the intestinal barrier function by inhibiting COX-2 through sulfhydrating human antigen R in colitis. J Adv Res 2022; 44:201-212. [PMID: 36725190 PMCID: PMC9936422 DOI: 10.1016/j.jare.2022.03.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 07/15/2021] [Accepted: 03/14/2022] [Indexed: 02/04/2023] Open
Abstract
INTRODUCTION Lipopolysaccharide (LPS) causes lesions of the epithelial barrier, which allows translocation of pathogens from the intestinal lumen to the host's circulation. Hydrogen sulfide (H2S) regulates multiple physiological and pathological processes in colonic epithelial tissue, and CBS-H2S axis involved in multiple gastrointestinal disorder. However, the mechanism underlying the effect of the CBS-H2S axis on the intestinal and systemic inflammation in colitis remains to be illustrated. OBJECTIVES To investigate the effect of CBS-H2S axis on the intestinal and systematic inflammation related injuries in LPS induced colitis and the underlying mechanisms. METHODS Wild type and CBS-/+ mice were used to evaluate the effect of endogenous and exogenous H2S on LPS-induced colitis in vivo. Cytokine quantitative antibody array, western blot and real-time PCR were applied to detect the key cytokines in the mechanism of action. Biotin switch of S-sulfhydration, CRISPR/Cas9 mediated knockout, immunofluorescence and ActD chase assay were used in the in vitro experiment to further clarify the molecular mechanisms. RESULTS H2S significantly alleviated the symptoms of LPS-induced colitis in vivo and attenuated the increase of COX-2 expression. The sulfhydrated HuR increased when CBS express normally or GYY4137 was administered. While after knocking kown CBS, the expression of COX-2 in mice colon increased significantly, and the sulfhydration level of HuR decreased. The results in vitro illustrated that HuR can increase the stability of COX-2 mRNA, and the decrease of COX-2 were due to increased sulfhydration of HuR rather than the reduction of total HuR levels. CONCLUSION These results indicated that CBS-H2S axis played an important role in protecting intestinal barrier function in colitis. CBS-H2S axis increases the sulfhydration level of HuR, by which reduces the binding of HuR with COX-2 mRNA and inhibited the expression of COX-2.
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Affiliation(s)
- Shihao Guo
- Division of General Surgery, Peking University First Hospital, Peking University, 8, Beijing 100034, People’s Republic of China,Department of Colorectal Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, People’s Republic of China
| | - Zhihao Huang
- Division of General Surgery, Peking University First Hospital, Peking University, 8, Beijing 100034, People’s Republic of China
| | - Jing Zhu
- Division of General Surgery, Peking University First Hospital, Peking University, 8, Beijing 100034, People’s Republic of China
| | - Taohua Yue
- Division of General Surgery, Peking University First Hospital, Peking University, 8, Beijing 100034, People’s Republic of China
| | - Xin Wang
- Division of General Surgery, Peking University First Hospital, Peking University, 8, Beijing 100034, People’s Republic of China
| | - Yisheng Pan
- Division of General Surgery, Peking University First Hospital, Peking University, 8, Beijing 100034, People’s Republic of China
| | - Dingfang Bu
- Central Laboratory, Peking University First Hospital, Peking University, 8, Beijing 100034, People’s Republic of China
| | - Yucun Liu
- Division of General Surgery, Peking University First Hospital, Peking University, 8, Beijing 100034, People’s Republic of China
| | - Pengyuan Wang
- Division of General Surgery, Peking University First Hospital, Peking University, 8, Beijing 100034, People's Republic of China.
| | - Shanwen Chen
- Division of General Surgery, Peking University First Hospital, Peking University, 8, Beijing 100034, People's Republic of China.
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Lv B, Peng H, Qiu B, Zhang L, Ge M, Bu D, Li K, Yu X, Du J, Yang L, Tang C, Huang Y, Du J, Jin H. Sulphenylation of CypD at Cysteine 104: A Novel Mechanism by Which SO2 Inhibits Cardiomyocyte Apoptosis. Front Cell Dev Biol 2022; 9:784799. [PMID: 35118072 PMCID: PMC8805922 DOI: 10.3389/fcell.2021.784799] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 12/13/2021] [Indexed: 11/13/2022] Open
Abstract
Objectives: The study was designed to explore the role of endogenous gaseous signaling molecule sulfur dioxide (SO2) in the control of cardiomyocyte apoptosis and its molecular mechanisms.Methods: Neonatal mouse cardiac myocytes (NMCMs) and H9c2 cells were used in the cell experiments. The endogenous SO2 pathway including SO2 level and the expression of SO2-generating enzyme aspartate aminotransferase 1/2 (AAT1/2) were detected in NMCMs. The apoptosis of cardiomyocytes was examined by a TUNEL assay. The cleavage and the activity of apoptotic proteins caspase9 and caspase3 were measured. The content of ATP, the opening of mitochondrial permeability transition pore (mPTP), and the cytochrome c (cytc) leakage were detected by immunofluorescence. The sulphenylation of cyclophilin-D (CypD) was detected by biotin switch analysis. The four CypD mutant plasmids in which cysteine sites were mutated to serine were constructed to identify the SO2-affected site in vitro.Results: ISO down-regulated the endogenous SO2/AAT pathway of cardiomyocytes in association with a significant increase in cardiomyocyte apoptosis, demonstrated by the increases in apoptosis, cleaved-caspase3/caspase3 ratio, and caspase3 activity. Furthermore, ISO significantly reduced ATP production in H9c2 cells, but the supplement of SO2 significantly restored the content of ATP. ISO stimulated mPTP opening, resulting in an increase in the release of cytc, which further increased the ratio of cleaved caspase9/caspase9 and enhanced the protein activity of caspase9. While, the supplementation of SO2 reversed the above effects. Mechanistically, SO2 did not affect CypD protein expression, but sulphenylated CypD and inhibited mPTP opening, resulting in an inhibition of cardiomyocyte apoptosis. The C104S mutation in CypD abolished SO2-induced sulphenylation of CypD, and thereby blocked the inhibitory effect of SO2 on the mPTP opening and cardiomyocyte apoptosis.Conclusion: Endogenous SO2 sulphenylated CypD at Cys104 to inhibit mPTP opening, and thus protected against cardiomyocyte apoptosis.
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Affiliation(s)
- Boyang Lv
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Hanlin Peng
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Bingquan Qiu
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Lulu Zhang
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Mei Ge
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Dingfang Bu
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Kun Li
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, China
| | - Xiaoqi Yu
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, China
| | - Jiantong Du
- Department of Ophthalmology, Peking University First Hospital, Beijing, China
| | - Liu Yang
- Department of Ophthalmology, Peking University First Hospital, Beijing, China
| | - Chaoshu Tang
- Key Laboratory of Molecular Cardiology, Ministry of Education, Beijing, China
- Department of Physiology and Pathophysiology, Peking University Health Science Centre, Beijing, China
| | - Yaqian Huang
- Department of Pediatrics, Peking University First Hospital, Beijing, China
- *Correspondence: Yaqian Huang, ; Junbao Du, ; Hongfang Jin,
| | - Junbao Du
- Department of Pediatrics, Peking University First Hospital, Beijing, China
- Key Laboratory of Molecular Cardiology, Ministry of Education, Beijing, China
- *Correspondence: Yaqian Huang, ; Junbao Du, ; Hongfang Jin,
| | - Hongfang Jin
- Department of Pediatrics, Peking University First Hospital, Beijing, China
- *Correspondence: Yaqian Huang, ; Junbao Du, ; Hongfang Jin,
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Song Y, Song J, Zhu Z, Peng H, Ding X, Yang F, Li K, Yu X, Yang G, Tao Y, Bu D, Tang C, Huang Y, Du J, Jin H. Compensatory role of endogenous sulfur dioxide in nitric oxide deficiency-induced hypertension. Redox Biol 2021; 48:102192. [PMID: 34818607 PMCID: PMC8626683 DOI: 10.1016/j.redox.2021.102192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 11/11/2021] [Accepted: 11/17/2021] [Indexed: 12/11/2022] Open
Abstract
OBJECTIVE This study aimed to determine the communicational pattern of gaseous signaling molecules sulfur dioxide (SO2) and nitric oxide (NO) between vascular endothelial cells (VECs) and vascular smooth muscle cells (VSMCs), and elucidate the compensatory role and significance of endogenous SO2 in the development of hypertension due to NO deficiency. APPROACH AND RESULTS Blood pressure was monitored by the tail-cuff and implantable physiological signal telemetry in L-nitro-arginine methyl ester (l-NAME)-induced hypertensive mice, and structural alterations of mouse aortic vessels were detected by the elastic fiber staining method. l-NAME-treated mice showed decreased plasma NO levels, increased SO2 levels, vascular remodeling, and increased blood pressure, and application of l-aspartate-β-hydroxamate, which inhibits SO2 production, further aggravated vascular structural remodeling and increased blood pressure. Moreover, in a co-culture system of HAECs and HASMCs, NO from HAECs did not influence aspartate aminotransferase (AAT)1 protein expression but decreased AAT1 activity in HASMCs, thereby resulting in the inhibition of endogenous SO2 production. Furthermore, NO promoted S-nitrosylation of AAT1 protein in HASMCs and purified AAT1 protein. Liquid chromatography with tandem mass spectrometry showed that the Cys192 site of AAT1 purified protein was modified by S-nitrosylation. In contrast, dithiothreitol or C192S mutations in HASMCs blocked NO-induced AAT1 S-nitrosylation and restored AAT1 enzyme activity. CONCLUSION Endothelium-derived NO inhibits AAT activity by nitrosylating AAT1 at the Cys192 site and reduces SO2 production in HASMCs. Our findings suggest that SO2 acts as a compensatory defense system to antagonize vascular structural remodeling and hypertension when the endogenous NO pathway is disturbed.
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Affiliation(s)
- Yunjia Song
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Jiaru Song
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Zhigang Zhu
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Hanlin Peng
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Xiang Ding
- Key Laboratory of Protein and Peptide Pharmaceuticals & Laboratory of Proteomics, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Fuquan Yang
- Key Laboratory of Protein and Peptide Pharmaceuticals & Laboratory of Proteomics, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Kun Li
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Xiaoqi Yu
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Guosheng Yang
- Laboratory Animal Facility, Peking University First Hospital, Beijing, 100034, China
| | - Yinghong Tao
- Laboratory Animal Facility, Peking University First Hospital, Beijing, 100034, China
| | - Dingfang Bu
- Central Laboratory, Peking University First Hospital, Beijing, 100034, China
| | - Chaoshu Tang
- Key Laboratory of Molecular Cardiology, Ministry of Education, Beijing, China
| | - Yaqian Huang
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Junbao Du
- Department of Pediatrics, Peking University First Hospital, Beijing, China; Key Laboratory of Molecular Cardiology, Ministry of Education, Beijing, China
| | - Hongfang Jin
- Department of Pediatrics, Peking University First Hospital, Beijing, China.
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Chen S, Liu T, Bu D, Zhu J, Wang X, Pan Y, Liu Y, Lu ZJ, Wang P. Methylome profiling identifies TCHH methylation in CfDNA as a noninvasive marker of liver metastasis in colorectal cancer. FASEB J 2021; 35:e21720. [PMID: 34110642 DOI: 10.1096/fj.202100266r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 05/14/2021] [Accepted: 05/20/2021] [Indexed: 11/11/2022]
Abstract
Methylation of circulating free DNA (CfDNA) has emerged as an efficient marker of tumor screening and prognostics. However, no efficient methylation marker has been developed for monitoring liver metastasis (LM) in colorectal cancer (CRC). Utilizing methylome profiling and bisulfite sequencing polymerase chain reaction of paired primary and LM sites, significantly increased methylation of TCHH was identified in the process of LM in CRC in the present study. Methylight analysis of TCHH methylation in CfDNA displayed a promisingly discriminative power between CRC with and without LM. Besides, significant coefficient of TCHH methylation and LM tumor volume was also validated. Together, these results indicated the potential of TCHH methylation in CfDNA as a monitoring marker of LM in CRC.
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Affiliation(s)
- Shanwen Chen
- Division of General Surgery, Peking University First Hospital, Beijing, China
| | - Tao Liu
- Division of General Surgery, Peking University First Hospital, Beijing, China
| | - Dingfang Bu
- Central laboratory, Peking University First Hospital, Beijing, China
| | - Jing Zhu
- Division of General Surgery, Peking University First Hospital, Beijing, China
| | - Xin Wang
- Division of General Surgery, Peking University First Hospital, Beijing, China
| | - Yisheng Pan
- Division of General Surgery, Peking University First Hospital, Beijing, China
| | - Yucun Liu
- Division of General Surgery, Peking University First Hospital, Beijing, China
| | - Zhi John Lu
- MOE Key Laboratory of Bioinformatics, Center for Synthetic and Systems Biology, School of Life Sciences, Tsinghua University, Beijing, China
| | - Pengyuan Wang
- Division of General Surgery, Peking University First Hospital, Beijing, China
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Huang Y, Li Z, Zhang L, Tang H, Zhang H, Wang C, Chen SY, Bu D, Zhang Z, Zhu Z, Yuan P, Li K, Yu X, Kong W, Tang C, Jung Y, Ferreira RB, Carroll KS, Du J, Yang J, Jin H. Endogenous SO 2-dependent Smad3 redox modification controls vascular remodeling. Redox Biol 2021; 41:101898. [PMID: 33647858 PMCID: PMC7933484 DOI: 10.1016/j.redox.2021.101898] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Revised: 02/08/2021] [Accepted: 02/10/2021] [Indexed: 12/14/2022] Open
Abstract
Sulfur dioxide (SO2) has emerged as a physiological relevant signaling molecule that plays a prominent role in regulating vascular functions. However, molecular mechanisms whereby SO2 influences its upper-stream targets have been elusive. Here we show that SO2 may mediate conversion of hydrogen peroxide (H2O2) to a more potent oxidant, peroxymonosulfite, providing a pathway for activation of H2O2 to convert the thiol group of protein cysteine residues to a sulfenic acid group, aka cysteine sulfenylation. By using site-centric chemoproteomics, we quantified >1000 sulfenylation events in vascular smooth muscle cells in response to exogenous SO2. Notably, ~42% of these sulfenylated cysteines are dynamically regulated by SO2, among which is cysteine-64 of Smad3 (Mothers against decapentaplegic homolog 3), a key transcriptional modulator of transforming growth factor β signaling. Sulfenylation of Smad3 at cysteine-64 inhibits its DNA binding activity, while mutation of this site attenuates the protective effects of SO2 on angiotensin II-induced vascular remodeling and hypertension. Taken together, our findings highlight the important role of SO2 in vascular pathophysiology through a redox-dependent mechanism.
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Affiliation(s)
- Yaqian Huang
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Zongmin Li
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences • Beijing, Beijing Institute of Lifeomics, Beijing, 102206, China; Anhui Medical University, Hefei, 230032, China
| | - Lulu Zhang
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Huan Tang
- Synthetic and Functional Biomolecules Center, Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Heng Zhang
- Department of Endocrinology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, 100020, China
| | - Chu Wang
- Synthetic and Functional Biomolecules Center, Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Selena Ying Chen
- Division of Biological Sciences, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Dingfang Bu
- Laboratory Center, Peking University First Hospital, Beijing, 100034, China
| | - Zaifeng Zhang
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Zhigang Zhu
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Piaoliu Yuan
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Kun Li
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Xiaoqi Yu
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Wei Kong
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing, 100191, China; Key Laboratory of Cardiovascular Sciences, Ministry of Education, China
| | - Chaoshu Tang
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing, 100191, China; Key Laboratory of Cardiovascular Sciences, Ministry of Education, China
| | - Youngeun Jung
- Department of Chemistry, The Scripps Research Institute, Jupiter, FL, 33458, USA
| | - Renan B Ferreira
- Department of Chemistry, The Scripps Research Institute, Jupiter, FL, 33458, USA
| | - Kate S Carroll
- Department of Chemistry, The Scripps Research Institute, Jupiter, FL, 33458, USA
| | - Junbao Du
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China; Key Laboratory of Cardiovascular Sciences, Ministry of Education, China
| | - Jing Yang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences • Beijing, Beijing Institute of Lifeomics, Beijing, 102206, China; Anhui Medical University, Hefei, 230032, China.
| | - Hongfang Jin
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China; Key Laboratory of Cardiovascular Sciences, Ministry of Education, China.
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Tian X, Zhou D, Zhang Y, Song Y, Zhang Q, Bu D, Sun Y, Wu L, Long Y, Tang C, Du J, Huang Y, Jin H. Persulfidation of transcription factor FOXO1 at cysteine 457: A novel mechanism by which H 2S inhibits vascular smooth muscle cell proliferation. J Adv Res 2020; 27:155-164. [PMID: 33318874 PMCID: PMC7728583 DOI: 10.1016/j.jare.2020.06.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Revised: 06/23/2020] [Accepted: 06/25/2020] [Indexed: 02/06/2023] Open
Abstract
FOXO1 is involved in the inhibitory effect of H2S on vascular smooth muscle cell proliferation. H2S inhibits vascular smooth muscle cell proliferation by maintaining FOXO1 activity. H2S preserves FOXO1 activity by persulfidation. H2S persulfidates FOXO1 at Cys457 and subsequently prevents FOXO1 phosphorylation at Ser256. The results provide new ideas for therapeutic strategies for anti-vascular remodeling.
Introduction The proliferation of vascular smooth muscle cells (VSMCs) is an important physiological and pathological basis for many cardiovascular diseases. Endogenous hydrogen sulfide (H2S), the third gasotransmitter, is found to preserve vascular structure by inhibiting VSMC proliferation. However, the mechanism by which H2S suppresses VSMC proliferation has not been fully clear. Objectives This study aimed to explore whether H2S persulfidates the transcription factor FOXO1 to inhibit VSMC proliferation. Methods After the proliferation of VSMC A7r5 cells was induced by endothelin-1 (ET-1), FOXO1 phosphorylation and proliferating cell nuclear antigen (PCNA) expression were detected by Western blotting, the degree of FOXO1 nuclear exclusion and PCNA fluorescent signals in the nucleus were detected by immunofluorescence, and the persulfidation of FOXO1 was measured through a biotin switch assay. Results The results showed that ET-1 stimulation increased cell proliferation, FOXO1 phosphorylation and FOXO1 nuclear exclusion to the cytoplasm in the cells. However, pretreatment with NaHS, an H2S donor, successfully abolished the ET-1-induced increases in the VSMC proliferation, FOXO1 phosphorylation, and FOXO1 nuclear exclusion to the cytoplasm. Mechanistically, H2S persulfidated the FOXO1 protein in A7r5 and 293T cells, and the thiol reductant DTT reversed this effect. Furthermore, the C457S mutation of FOXO1 abolished the H2S-induced persulfidation of FOXO1 in the cells and the subsequent inhibitory effects on FOXO1 phosphorylation at Ser256, FOXO1 nuclear exclusion to the cytoplasm and cell proliferation. Conclusion Thus, our findings demonstrated that H2S might inhibit VSMC proliferation by persulfidating FOXO1 at Cys457 and subsequently preventing FOXO1 phosphorylation at Ser256.
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Affiliation(s)
- Xiaoyu Tian
- Department of Pediatrics, Peking University First Hospital, Beijing 100034, China
- Research Unit of Clinical Diagnosis and Treatment of Pediatric Syncope and Cardiovascular Diseases, Chinese Academy of Medical Sciences, Beijing, China
| | - Dan Zhou
- Department of Cardiology, Wuhan Children's Hospital, Wuhan, China
| | - Yong Zhang
- Department of Cardiology, Wuhan Children's Hospital, Wuhan, China
| | - Yunjia Song
- Department of Pediatrics, Peking University First Hospital, Beijing 100034, China
| | - Qingyou Zhang
- Department of Pediatrics, Peking University First Hospital, Beijing 100034, China
| | - Dingfang Bu
- Department of Pediatrics, Peking University First Hospital, Beijing 100034, China
| | - Yan Sun
- Department of Pediatrics, Peking University First Hospital, Beijing 100034, China
| | - Liling Wu
- Key Laboratory of Molecular Cardiology, Ministry of Education, Beijing, China
- Department of Physiology and Pathophysiology, Peking University Health Science Centre, Beijing 100091, China
| | - Yuan Long
- Department of Cardiology, Wuhan Children's Hospital, Wuhan, China
| | - Chaoshu Tang
- Key Laboratory of Molecular Cardiology, Ministry of Education, Beijing, China
- Department of Physiology and Pathophysiology, Peking University Health Science Centre, Beijing 100091, China
| | - Junbao Du
- Department of Pediatrics, Peking University First Hospital, Beijing 100034, China
- Key Laboratory of Molecular Cardiology, Ministry of Education, Beijing, China
- Corresponding authors at: Department of Pediatrics, Peking University First Hospital, Xi An Men Str. No.1 West District, Beijing 100034, China.
| | - Yaqian Huang
- Department of Pediatrics, Peking University First Hospital, Beijing 100034, China
- Corresponding authors at: Department of Pediatrics, Peking University First Hospital, Xi An Men Str. No.1 West District, Beijing 100034, China.
| | - Hongfang Jin
- Department of Pediatrics, Peking University First Hospital, Beijing 100034, China
- Research Unit of Clinical Diagnosis and Treatment of Pediatric Syncope and Cardiovascular Diseases, Chinese Academy of Medical Sciences, Beijing, China
- Corresponding authors at: Department of Pediatrics, Peking University First Hospital, Xi An Men Str. No.1 West District, Beijing 100034, China.
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9
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Song Y, Peng H, Bu D, Ding X, Yang F, Zhu Z, Tian X, Zhang L, Wang X, Tang C, Huang Y, Du J, Jin H. Corrigendum to "Negative auto-regulation of sulfur dioxide generation in vascular endothelial cells: AAT1 S-sulfenylation" [Biochem. Biophys. Res. Commun. 525 (1) (2020) 231-237]. Biochem Biophys Res Commun 2020; 526:1177-1178. [PMID: 32312518 DOI: 10.1016/j.bbrc.2020.04.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- Yunjia Song
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China; Research Unit of Clinical Diagnosis and Treatment of Pediatric Syncope and Cardiovascular Diseases, Chinese Academy of Medical Sciences, China
| | - Hanlin Peng
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Dingfang Bu
- Research Center, Peking University First Hospital, Beijing, 100034, China
| | - Xiang Ding
- Key Laboratory of Protein and Peptide Pharmaceuticals & Laboratory of Proteomics, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Fuquan Yang
- Key Laboratory of Protein and Peptide Pharmaceuticals & Laboratory of Proteomics, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Zhigang Zhu
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Xiaoyu Tian
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Lulu Zhang
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Xiuli Wang
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Chaoshu Tang
- Department of Physiology and Pathophysiology, Peking University Health Science Centre, Beijing, 100191, China; Key Laboratory of Molecular Cardiology, Ministry of Education, Beijing, 100191, China
| | - Yaqian Huang
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Junbao Du
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China; Key Laboratory of Molecular Cardiology, Ministry of Education, Beijing, 100191, China
| | - Hongfang Jin
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China.
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10
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Song Y, Peng H, Bu D, Ding X, Yang F, Zhu Z, Tian X, Zhang L, Wang X, Tang C, Huang Y, Du J, Jin H. Negative auto-regulation of sulfur dioxide generation in vascular endothelial cells: AAT1 S-sulfenylation. Biochem Biophys Res Commun 2020; 525:S0006-291X(20)30306-5. [PMID: 32087961 DOI: 10.1016/j.bbrc.2020.02.040] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 01/18/2020] [Accepted: 02/06/2020] [Indexed: 01/10/2023]
Abstract
Recently, endogenous sulfur dioxide (SO2) has been found to exert an important function in the cardiovascular system. However, the regulatory mechanism for SO2 generation has not been entirely clarified. Hence, we aimed to explore the possible auto-regulation of endogenous SO2 generation and its mechanisms in vascular endothelial cells. We showed that SO2 did not affect the protein expression of aspartate aminotransferase 1 (AAT1), a major SO2 synthesis enzyme, but significantly inhibited AAT activity in primary human umbilical vein endothelial cells (HUVECs) and porcine purified AAT1 protein. An AAT1 enzymatic kinetic study showed that SO2 reduced the Vmax (1.89 ± 0.10 vs 2.55 ± 0.12, μmol/mg/min, P < 0.05) and increased the Km (35.97 ± 9.54 vs 19.33 ± 1.76 μmol/L, P < 0.05) values. Furthermore, SO2 induced S-sulfenylation of AAT1 in primary HUVECs and purified AAT1 protein. LC-MS/MS analysis indicated that SO2 sulfenylated AAT1 at Cys192. Mechanistically, thiol reductant DTT treatment or C192S mutation prevented SO2-induced AAT1 sulfenylation and the subsequent inhibition of AAT activity in purified AAT1 protein and primary HUVECs. Our findings reveal, for the first time, a mechanism of auto-regulation of SO2 generation through sulfenylation of AAT1 at Cys192 to suppress AAT activity in vascular endothelial cells. These findings will greatly deepen the understanding of regulatory mechanisms in the cardiovascular homeostasis.
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Affiliation(s)
- Yunjia Song
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China; Research Unit of Clinical Diagnosis and Treatment of Pediatric Syncope and Cardiovascular Diseases, Chinese Academy of Medical Sciences, China
| | - Hanlin Peng
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Dingfang Bu
- Research Center, Peking University First Hospital, Beijing, 100034, China
| | - Xiang Ding
- Key Laboratory of Protein and Peptide Pharmaceuticals & Laboratory of Proteomics, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
| | - Fuquan Yang
- Key Laboratory of Protein and Peptide Pharmaceuticals & Laboratory of Proteomics, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
| | - Zhigang Zhu
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Xiaoyu Tian
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Lulu Zhang
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Xiuli Wang
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Chaoshu Tang
- Department of Physiology and Pathophysiology, Peking University Health Science Centre, Beijing, 100191, China; Key Laboratory of Molecular Cardiology, Ministry of Education, Beijing, 100191, China
| | - Yaqian Huang
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Junbao Du
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China; Key Laboratory of Molecular Cardiology, Ministry of Education, Beijing, 100191, China
| | - Hongfang Jin
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China.
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11
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Zhao J, Munanairi A, Liu XY, Zhang J, Hu L, Hu M, Bu D, Liu L, Xie Z, Kim BS, Yang Y, Chen ZF. PAR2 Mediates Itch via TRPV3 Signaling in Keratinocytes. J Invest Dermatol 2020; 140:1524-1532. [PMID: 32004565 DOI: 10.1016/j.jid.2020.01.012] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 12/10/2019] [Accepted: 01/12/2020] [Indexed: 12/13/2022]
Abstract
Animal studies have suggested that transient receptor potential ion channels and G-protein coupled receptors play important roles in itch transmission. TRPV3 gain-of-function mutations have been identified in patients with Olmsted syndrome, which is associated with severe pruritus. However, the mechanisms causing itch remain poorly understood. Here, we show that keratinocytes lacking TRPV3 impair the function of protease-activated receptor 2 (PAR2), resulting in reduced neuronal activation and scratching behavior in response to PAR2 agonists. Moreover, we show that TRPV3 and PAR2 were upregulated in skin biopsies from patients and mice with atopic dermatitis, whereas their inhibition attenuated scratching and inflammatory responses in mouse atopic dermatitis models. These results reveal a previously unrecognized link between TRPV3 and PAR2 in keratinocytes to convey itch information and suggest that a blockade of PAR2 or TRPV3 individually or both may serve as a potential approach for antipruritic therapy in atopic dermatitis.
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Affiliation(s)
- Jiahui Zhao
- Department of Dermatology, Peking University First Hospital, Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, National Clinical Research Center for Skin and Immune Disease, Beijing, China; Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine, St. Louis, USA
| | - Admire Munanairi
- Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine, St. Louis, USA; Department of Anesthesiology, Washington University School of Medicine, St. Louis, USA; Current Address: Department of Pediatrics, Washington University School of Medicine, St. Louis, USA
| | - Xian-Yu Liu
- Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine, St. Louis, USA; Department of Anesthesiology, Washington University School of Medicine, St. Louis, USA
| | - Jie Zhang
- Department of Dermatology, Peking University First Hospital, Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, National Clinical Research Center for Skin and Immune Disease, Beijing, China
| | - Linghan Hu
- Department of Dermatology, Peking University First Hospital, Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, National Clinical Research Center for Skin and Immune Disease, Beijing, China; Peking-Tsinghua Center for Life Sciences, Beijing, China; Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China
| | - Meiqin Hu
- State Key Laboratory of Membrane Biology and Beijing Key Laboratory of Cardio-metabolic Molecular Medicine, Peking University, Beijing, China
| | - Dingfang Bu
- Department of Dermatology, Peking University First Hospital, Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, National Clinical Research Center for Skin and Immune Disease, Beijing, China
| | - Lingling Liu
- Department of Dermatology, Peking University First Hospital, Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, National Clinical Research Center for Skin and Immune Disease, Beijing, China
| | - Zhiqiang Xie
- Department of Dermatology, Peking University Third Hospital, Beijing, China
| | - Brian S Kim
- Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine, St. Louis, USA; Department of Dermatology(,) Washington University School of Medicine, St. Louis, USA
| | - Yong Yang
- Department of Dermatology, Peking University First Hospital, Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, National Clinical Research Center for Skin and Immune Disease, Beijing, China; Peking-Tsinghua Center for Life Sciences, Beijing, China; Current Address: Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China.
| | - Zhou-Feng Chen
- Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine, St. Louis, USA; Department of Anesthesiology, Washington University School of Medicine, St. Louis, USA; Department of Psychiatry, Washington University School of Medicine, St. Louis, USA; Department of Developmental Biology, Washington University School of Medicine, St. Louis, USA.
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12
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Yue T, Zuo S, Bu D, Zhu J, Chen S, Ma Y, Ma J, Guo S, Wen L, Zhang X, Hu J, Wang Y, Yao Z, Chen G, Wang X, Pan Y, Wang P, Liu Y. Aminooxyacetic acid (AOAA) sensitizes colon cancer cells to oxaliplatin via exaggerating apoptosis induced by ROS. J Cancer 2020; 11:1828-1838. [PMID: 32194794 PMCID: PMC7052847 DOI: 10.7150/jca.35375] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [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: 04/01/2019] [Accepted: 11/14/2019] [Indexed: 12/24/2022] Open
Abstract
Background: As the third confirmed gaseous transmitter, the role of hydrogen sulfide (H2S) in the pathogenesis of multiple types of cancer has been attracting increasing attention. Increased expression of cystathionine β-synthase (CBS) and H2S in colon cancer tissue samples has been validated and tumor-derived H2S, mainly produced by CBS, stimulates bioenergetics, cell proliferation, and angiogenesis in colon cancer. Recently, the therapeutic manipulation of H2S has been proposed as a promising anticancer approach. However, the effect of aminooxyacetic acid (AOAA), which has been widely used as an inhibitor of CBS dependent synthesis of H2S, on the chemotherapeutic effect of oxaliplatin (OXA) and the underlying mechanisms remain to be illustrated. Methods: We examined the expression of CBS in human colorectal cancer specimens and matched normal mucosa by immunohistochemistry. The effect of AOAA on the sensitivity of colon cancer cells to OXA and the level of apoptosis induced by caspase cascade was investigated in both HCT116 and HT29 cell lines utilizing CCK-8 assays, flow cytometry analysis and western blot analysis. The endogenous levels of reactive oxygen species (ROS) were detected fluorescently by DCF-DA, and glutathione (GSH) levels were measured by a Total GSH Detection Kit. Tumor bearing xenograft mouse models and in vivo imaging systems were further used to investigate the effect of AOAA in vivo and immunohistochemistry (IHC) and TUNEL analysis were performed. Results: In the current study, we confirmed CBS, the main target of AOAA, is overexpressed in human colorectal cancer by immunohistochemistry. The inhibitory effect of AOAA on the synthesis of H2S was validated utilizing fluorescent probe and specific electrode. AOAA significantly reduced the IC50 values of OXA in both colon cancer cell lines. Co-incubation with AOAA elicited increased apoptosis induced by OXA, featured by increased activation of caspase cascade. Besides, AOAA further increased the levels of ROS induced by OXA and attenuated the synthesis of glutathione (GSH), which is a vital antioxidant. Besides, the results of in vivo imaging and following IHC and TUNEL analysis were in accordance with cellular experiments, indicating that AOAA sensitizes colon cancer cells to OXA via exaggerating intrinsic apoptosis. Conclusion: The results suggested that CBS is overexpressed in colorectal cancer tissues and AOAA sensitizes colon cancer cells to OXA via exaggerating apoptosis both in vitro and in vivo. Decreasing the endogenous level of GSH and consequently impaired detoxification of ROS might be one of the mechanisms underlying the effect of AOAA.
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Affiliation(s)
- Taohua Yue
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi Shiku Street, Beijing, 100034, People's Republic of China
| | - Shuai Zuo
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi Shiku Street, Beijing, 100034, People's Republic of China
| | - Dingfang Bu
- Central laboratory, Peking University First Hospital, Peking University, 8 Xi Shiku Street, Beijing, 100034, People's Republic of China
| | - Jing Zhu
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi Shiku Street, Beijing, 100034, People's Republic of China
| | - Shanwen Chen
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi Shiku Street, Beijing, 100034, People's Republic of China
| | - Yongchen Ma
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi Shiku Street, Beijing, 100034, People's Republic of China
| | - Ju Ma
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi Shiku Street, Beijing, 100034, People's Republic of China
| | - Shihao Guo
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi Shiku Street, Beijing, 100034, People's Republic of China
| | - Long Wen
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi Shiku Street, Beijing, 100034, People's Republic of China
| | - Xiaoqian Zhang
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi Shiku Street, Beijing, 100034, People's Republic of China
| | - Jianwen Hu
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi Shiku Street, Beijing, 100034, People's Republic of China
| | - Yurong Wang
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi Shiku Street, Beijing, 100034, People's Republic of China
| | - Zihao Yao
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi Shiku Street, Beijing, 100034, People's Republic of China
| | - Guowei Chen
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi Shiku Street, Beijing, 100034, People's Republic of China
| | - Xin Wang
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi Shiku Street, Beijing, 100034, People's Republic of China
| | - Yisheng Pan
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi Shiku Street, Beijing, 100034, People's Republic of China
| | - Pengyuan Wang
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi Shiku Street, Beijing, 100034, People's Republic of China
| | - Yucun Liu
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi Shiku Street, Beijing, 100034, People's Republic of China
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13
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Chen S, Yue T, Huang Z, Zhu J, Bu D, Wang X, Pan Y, Liu Y, Wang P. Inhibition of hydrogen sulfide synthesis reverses acquired resistance to 5-FU through miR-215-5p-EREG/TYMS axis in colon cancer cells. Cancer Lett 2019; 466:49-60. [PMID: 31542354 DOI: 10.1016/j.canlet.2019.09.006] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [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] [Received: 06/25/2019] [Revised: 08/03/2019] [Accepted: 09/14/2019] [Indexed: 01/05/2023]
Abstract
Acquired resistance to 5-fluorouracil (5-FU) is a major barrier to benefit from chemotherapy in colon cancer patients. Hydrogen sulfide (H2S), mainly produced by cystathionine-β-synthase (CBS), has been reported to promote the proliferation and migration of colon cancer cells. In this study, the effect of inhibiting H2S synthesis on the sensitivity of colon cancer cell lines to 5-FU was investigated. Increased expression of CBS was validated in online database and tissue microarrays. Inhibiting H2S synthesis significantly sensitized colon cancer cell lines to 5-FU both in vitro and in vivo. Decreasing H2S synthesis utilizing shRNA lentiviruses significantly reversed the acquired resistance to 5-FU. MicroRNA sequencing was performed and miR-215-5p was revealed as one of the miRNAs with most significantly altered expression levels after CBS knock down. Epiregulin (EREG) and thymidylate synthetase (TYMS) were predicted to be potential targets of miR-215-5p. Decreasing H2S synthesis significantly decreased the expression of EREG and TYMS. These results demonstrate that inhibiting H2S synthesis can reverse the acquired resistance to 5-FU in colon cancer cells.
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Affiliation(s)
- Shanwen Chen
- Division of General Surgery, Peking University First Hospital, Beijing, China
| | - Taohua Yue
- Division of General Surgery, Peking University First Hospital, Beijing, China
| | - Zhihao Huang
- Division of General Surgery, Peking University First Hospital, Beijing, China
| | - Jing Zhu
- Division of General Surgery, Peking University First Hospital, Beijing, China
| | - Dingfang Bu
- Central Laboratory, Peking University First Hospital, Beijing, China
| | - Xin Wang
- Division of General Surgery, Peking University First Hospital, Beijing, China
| | - Yisheng Pan
- Division of General Surgery, Peking University First Hospital, Beijing, China
| | - Yucun Liu
- Division of General Surgery, Peking University First Hospital, Beijing, China
| | - Pengyuan Wang
- Division of General Surgery, Peking University First Hospital, Beijing, China.
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14
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Chen S, Zuo S, Zhu J, Yue T, Bu D, Wang X, Wang P, Pan Y, Liu Y. Decreased Expression of Cystathionine β-Synthase Exacerbates Intestinal Barrier Injury in Ulcerative Colitis. J Crohns Colitis 2019; 13:1067-1080. [PMID: 30722010 DOI: 10.1093/ecco-jcc/jjz027] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUND AND AIMS Endogenous H2S regulates multiple physiological and pathological processes in colon epithelial tissues. The current study investigated the role of cystathionine β-synthase [CBS], a major producer of H2S in colon epithelial cells, in the pathogenesis of ulcerative colitis [UC]-related intestinal barrier injury. The expression and DNA methylation level of CBS were investigated in inflamed and non-inflamed colon tissues collected from UC patients, and the effect of decreased CBS levels on Caco-2 monolayer barrier injury and altered status of tight junctions elicited by tumour necrosis factor/interferon [TNF/IFN] was determined. METHODS The expression of CBS and the methylation level of the CBS promoter were assessed in non-inflamed and inflamed colon epithelial tissue samples collected from UC patients. Barrier function, status of tight junction proteins and activation of the NF-κB p65-mediated MLCK-P-MLC signalling pathway were further investigated in Caco-2 monolayers. RESULTS Decreased expression of CBS and elevated methylation levels of the CBS promoter were observed in inflamed sites compared with in non-inflamed sites in the colon epithelial samples from UC patients. In Caco-2 monolayers, decreased expression of CBS exacerbated TNF/IFN-induced barrier injury and altered localization of tight junction proteins. Decreased expression of CBS predisposed Caco-2 monolayers to injury elicited by TNF/IFN via augmentation of the NF-κB p65-mediated MLCK-P-MLC signalling pathway. CONCLUSIONS Decreased expression of CBS propagates the pathogenesis of UC by exacerbating inflammation-induced intestinal barrier injury. Elevated methylation of the CBS promoter might be one of the mechanisms underlying the decreased expression of CBS in inflamed sites of colon epithelial tissues from UC patients.
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Affiliation(s)
- Shanwen Chen
- Division of General Surgery, Peking University First Hospital, Beijing, China
| | - Shuai Zuo
- Division of General Surgery, Peking University First Hospital, Beijing, China
| | - Jing Zhu
- Division of General Surgery, Peking University First Hospital, Beijing, China
| | - Taohua Yue
- Division of General Surgery, Peking University First Hospital, Beijing, China
| | - Dingfang Bu
- Central Laboratory, Peking University First Hospital, Beijing, China
| | - Xin Wang
- Division of General Surgery, Peking University First Hospital, Beijing, China
| | - Pengyuan Wang
- Division of General Surgery, Peking University First Hospital, Beijing, China
| | - Yisheng Pan
- Division of General Surgery, Peking University First Hospital, Beijing, China
| | - Yucun Liu
- Division of General Surgery, Peking University First Hospital, Beijing, China
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15
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Niu J, Ma L, Zhang Q, Bu D. PSXI-15 Effect of peptides and corn processing on in vitro rumen fermentation and microbial protein synthesis. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.915] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- J Niu
- Institute of Animal Science, Chinese Academy of Agricultural Sciences,Beijing, China (People’s Republic)
| | - L Ma
- Institute of Animal Science, Chinese Academy of Agricultural Sciences,Beijing, China (People’s Republic)
| | - Q Zhang
- Department of Animal Science, Ningxia University,Ningxia, China (People’s Republic)
| | - D Bu
- Institute of Animal Science, Chinese Academy of Agricultural Sciences,Beijing, China (People’s Republic)
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16
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Niu J, Zhao M, Bu D, Zhang Q, Zhang W, Ma L. PSXI-14 Effects of dietary neutral detergent fiber and starch ratio on performance and milk composition in lactating dairy cows: a meta-analysis. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- J Niu
- Institute of Animal Science, Chinese Academy of Agricultural Sciences,Beijing, China (People’s Republic)
| | - M Zhao
- Inner Mongolia Youran Farming Co., Ltd.,Hohhot, China
| | - D Bu
- Institute of Animal Science, Chinese Academy of Agricultural Sciences,Beijing, China (People’s Republic)
| | - Q Zhang
- Department of Animal Science, Ningxia University,Ningxia, China (People’s Republic)
| | - W Zhang
- College of Animal Science and Technology, Shihezi University,Shihezi, China (People’s Republic)
| | - L Ma
- Institute of Animal Science, Chinese Academy of Agricultural Sciences,Beijing, China (People’s Republic)
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17
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Ma L, Yang Y, Zhao X, Wang F, Gao S, Tan Z, Baumgard L, Bu D. PSXI-20 Heat stress induces proteomic changes in the liver and mammary tissue of dairy cows independent of feed intake: an iTRAQ study. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- L Ma
- Institute of Animal Science, Chinese Academy of Agricultural Sciences,Beijing, China (People’s Republic)
| | - Y Yang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences;Institute of Animal Science and Veterinary Medicine, Anhui Academy of Agricultural Sciences,Hefei, China
| | - X Zhao
- Institute of Animal Science, Chinese Academy of Agricultural Sciences;Institute of Animal Science and Veterinary Medicine, Anhui Academy of Agricultural Sciences,Hefei, China
| | - F Wang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences,Beijing, China (People’s Republic)
| | - S Gao
- Institute of Animal Science, Chinese Academy of Agricultural Sciences,Beijing, China (People’s Republic)
| | - Z Tan
- Institute of Subtropical Agriculture, The Chinese Academy of Sciences],Changsha, China (People’s Republic)
| | - L Baumgard
- Department of Animal Science, Iowa State University,Ames, IA, United States
| | - D Bu
- Institute of Animal Science, Chinese Academy of Agricultural Sciences,Beijing, China (People’s Republic)
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18
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Sun Y, Huang Y, Yu W, Chen S, Yao Q, Zhang C, Bu D, Tang C, Du J, Jin H. Sulfhydration-associated phosphodiesterase 5A dimerization mediates vasorelaxant effect of hydrogen sulfide. Oncotarget 2018; 8:31888-31900. [PMID: 28404873 PMCID: PMC5458256 DOI: 10.18632/oncotarget.16649] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2016] [Accepted: 03/16/2017] [Indexed: 12/23/2022] Open
Abstract
The study was designed to examine if the vasorelaxant effect of hydrogen sulfide was mediated by sulfhydration-associated phosphodiesterase (PDE) 5A dimerization. The thoracic aorta of rat was separated and the vasorelaxant effects were examined with in vitro vascular perfusion experiments. The dimerization and sulfhydration of PDE 5A and soluble guanylatecyclase (sGC) were measured. PDE 5A and protein kinase G (PKG) activities were tested. Intracellular cGMP content was detected by enzyme-linked immunosorbent assay (ELISA). The results showed that NaHS relaxed isolated rat vessel rings at an EC50 of (1.79 ± 0.31)×10-5mol/L, associated with significantly increased PKG activity and cGMP content in vascular tissues. Sulfhydration of sGC β1 was increased, while the levels of sGC αβ1 dimers were apparently decreased after incubation with NaHS in vascular tissues. Moreover, PDE 5A homodimers were markedly decreased, and accordingly the PDE 5A activity demonstrated by the content of 5'-GMP was significantly decreased after incubation with NaHS or GYY4137. Mechanistically, both NaHS and GYY4137 significantly enhanced the PDE 5A sulfhydration in vascular tissues. DTT partially abolished the effects of NaHS on PDE 5A activity, cGMP content and vasorelaxation. Therefore, the present study for the first time suggested that H2S exerted vasorelaxant effect probably via sulfhydration-associated PDE 5A dimerization.
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Affiliation(s)
- Yan Sun
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Yaqian Huang
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Wen Yu
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Siyao Chen
- Department of Cardiac Surgery, Guangdong General Hospital, Guangzhou, 510000, China
| | - Qiuyu Yao
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Chunyu Zhang
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Dingfang Bu
- Centre Laboratory of Peking University First Hospital, Beijing, 100034, China
| | - Chaoshu Tang
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing, 100034, China
| | - Junbao Du
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China.,Key Laboratory of Cardiovascular Sciences, Ministry of Education, Beijing, 100034, China
| | - Hongfang Jin
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
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19
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Fu X, Fang B, Ma J, Liu Y, Bu D, Zhou P, Wang H, Jia K, Zhang G. Insights into the epidemic characteristics and evolutionary history of the novel porcine circovirus type 3 in southern China. Transbound Emerg Dis 2017; 65:e296-e303. [PMID: 29178283 DOI: 10.1111/tbed.12752] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [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: 08/06/2017] [Indexed: 01/07/2023]
Abstract
Porcine circovirus type 3 (PCV3) is a newly identified circovirus from swine in the USA, China and Poland. This novel circovirus has been associated with porcine dermatitis and nephropathy syndrome (PDNS), reproductive failure and multisystemic inflammation; moreover, PCV3 poses a potential threat to the swine industry. In this retrospective study, a phylogenetic analysis was conducted to address the epidemiology and evolutionary dynamics of this novel circovirus. The total positive sample rate of PCV3 was 26.7% (76/285) and has increased gradually over the past 3 years. Of these PCV3-positive samples, 22.3% (17/76) were coinfected with PCV2. PCV3 can be detected in multiple sample types with different positive rates, and the positive rate is highest among stillborn. We also divide PCV3 into three clades (PCV3a, PCV3b and PCV3c) based on two amino acid mutations (A24V and R27K) on the cap protein in this study. In addition, the origin of PCV3 was approximately 1966 and may have originated from a bat-associated circovirus. Our results suggested that PCV3 is widely distributed in southern China and has been circulating in swine herds for nearly half a century. PCV3 has evolved into different clades caused by mutations in cap proteins; thus, further research on PCV3 epidemiology should be conducted.
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Affiliation(s)
- X Fu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Key Laboratory of Zoonosis Prevention and Control of Guangdong Province, Guangzhou, China
| | - B Fang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Key Laboratory of Zoonosis Prevention and Control of Guangdong Province, Guangzhou, China
| | - J Ma
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Key Laboratory of Comprehensive Prevention and Control for Severe Clinical Animal Diseases of Guangdong Province, Guangzhou, China
| | - Y Liu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Key Laboratory of Zoonosis Prevention and Control of Guangdong Province, Guangzhou, China
| | - D Bu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Key Laboratory of Zoonosis Prevention and Control of Guangdong Province, Guangzhou, China
| | - P Zhou
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Key Laboratory of Comprehensive Prevention and Control for Severe Clinical Animal Diseases of Guangdong Province, Guangzhou, China
| | - H Wang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Key Laboratory of Comprehensive Prevention and Control for Severe Clinical Animal Diseases of Guangdong Province, Guangzhou, China
| | - K Jia
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Key Laboratory of Comprehensive Prevention and Control for Severe Clinical Animal Diseases of Guangdong Province, Guangzhou, China
| | - G Zhang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Key Laboratory of Zoonosis Prevention and Control of Guangdong Province, Guangzhou, China
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Abstract
Low-affinity Fcγ receptors (FcγR) act as key mediators of the pathogenic effects of autoantibodies. In this study, we aimed to determine whether copy number variations (CNVs) in FCGR3A and FCGR3B were associated with systemic lupus nephritis (SLE) and ANCA-associated systemic vasculitis (AASV) in Chinese individuals. A total of 1118 individuals were enrolled, including 415 SLE patients, 139 AASV patients, and 564 healthy controls. FCGR3A and FCGR3B copy numbers (CNs) were determined by both a paralogue ratio test and TaqMan quantitative PCR assay. In the susceptibility associations, a low FCGR3B CN was significantly associated with SLE ( p = 5.01 × 10-3; odds ratio (OR) 1.71; 95% confidence interval (CI) 1.17-2.48) and AASV ( p = 0.04; OR = 1.72; 95% CI 1.02-2.88). A low FCGR3A CN was also significantly associated with SLE ( p = 6.02 × 10-3; OR 2.72; 95% CI 1.30-5.71) and AASV ( p = 0.042; OR 2.64; 95% CI 1.00-6.93). Further subphenotype analysis revealed that low CNs of FCGR3A and FCGR3B were significantly associated with clinical manifestations in SLE and AASV patients. Therefore, in this case-control study, we identified low CNs of FCGR2A and FCGR3B to be common risk factors for SLE and AASV.
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Affiliation(s)
- Y Qi
- 1 Renal Division, Peking University First Hospital, People's Republic of China.,2 Peking University Institute of Nephrology, People's Republic of China.,3 Key Laboratory of Renal Disease, Ministry of Health of China, People's Republic of China.,4 Key Laboratory of Chronic Kidney Disease Prevention and Treatment (Peking University), Ministry of Education, Beijing, People's Republic of China
| | - X Zhou
- 1 Renal Division, Peking University First Hospital, People's Republic of China.,2 Peking University Institute of Nephrology, People's Republic of China.,3 Key Laboratory of Renal Disease, Ministry of Health of China, People's Republic of China.,4 Key Laboratory of Chronic Kidney Disease Prevention and Treatment (Peking University), Ministry of Education, Beijing, People's Republic of China
| | - D Bu
- 5 Research Central Institute, Peking University First Hospital, Beijing, People's Republic of China
| | - P Hou
- 1 Renal Division, Peking University First Hospital, People's Republic of China.,2 Peking University Institute of Nephrology, People's Republic of China.,3 Key Laboratory of Renal Disease, Ministry of Health of China, People's Republic of China.,4 Key Laboratory of Chronic Kidney Disease Prevention and Treatment (Peking University), Ministry of Education, Beijing, People's Republic of China
| | - J Lv
- 1 Renal Division, Peking University First Hospital, People's Republic of China.,2 Peking University Institute of Nephrology, People's Republic of China.,3 Key Laboratory of Renal Disease, Ministry of Health of China, People's Republic of China.,4 Key Laboratory of Chronic Kidney Disease Prevention and Treatment (Peking University), Ministry of Education, Beijing, People's Republic of China
| | - H Zhang
- 1 Renal Division, Peking University First Hospital, People's Republic of China.,2 Peking University Institute of Nephrology, People's Republic of China.,3 Key Laboratory of Renal Disease, Ministry of Health of China, People's Republic of China.,4 Key Laboratory of Chronic Kidney Disease Prevention and Treatment (Peking University), Ministry of Education, Beijing, People's Republic of China
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Lin Z, Li S, Feng C, Yang S, Wang H, Ma D, Zhang J, Gou M, Bu D, Zhang T, Kong X, Wang X, Sarig O, Ren Y, Dai L, Liu H, Zhang J, Li F, Hu Y, Padalon-Brauch G, Vodo D, Zhou F, Chen T, Deng H, Sprecher E, Yang Y, Tan X. Stabilizing mutations of KLHL24 ubiquitin ligase cause loss of keratin 14 and human skin fragility. Nat Genet 2016; 48:1508-1516. [DOI: 10.1038/ng.3701] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Accepted: 09/26/2016] [Indexed: 12/30/2022]
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22
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Jin D, Zhao S, Zheng N, Bu D, Beckers Y, Wang J. 1608 Metagenomic census of predominant ureC genes of ureolytic bacteria in the rumen of dairy cows. J Anim Sci 2016. [DOI: 10.2527/jam2016-1608] [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: 11/13/2022] Open
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23
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Ma L, Zhao M, Xu J, Zhao L, Bu D. 1643 Effects of dietary neutral detergent fiber and starch ratio on rumen epithelial cell morphological structure and gene expression in dairy cows. J Anim Sci 2016. [DOI: 10.2527/jam2016-1643] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Bu D, Li S, Yu Z, Gao S, Ma L, Zhou X, Wang J. 1617 Effect of dietary energy source and level on rumen bacteria community in lactating dairy cows. J Anim Sci 2016. [DOI: 10.2527/jam2016-1617] [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: 11/13/2022] Open
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25
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Gao S, Guo J, Quan S, Nan X, Baumgard LH, Bu D. 1507 The effects of heat stress on protein metabolism in lactating Holstein cows. J Anim Sci 2016. [DOI: 10.2527/jam2016-1507] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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26
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Quan S, Bu D, Zhang Y, Guo J, Gao S, Baumgard LH. 1588 Heat stress alters glucose homeostasis, hepatic heat shock proteins, and the immune system in lactating dairy cows. J Anim Sci 2016. [DOI: 10.2527/jam2016-1588] [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: 11/13/2022] Open
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27
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Chen S, Bu D, Ma Y, Zhu J, Sun L, Zuo S, Ma J, Li T, Chen Z, Zheng Y, Wang X, Pan Y, Wang P, Liu Y. GYY4137 ameliorates intestinal barrier injury in a mouse model of endotoxemia. Biochem Pharmacol 2016; 118:59-67. [PMID: 27553476 DOI: 10.1016/j.bcp.2016.08.016] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [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] [Received: 05/11/2016] [Accepted: 08/15/2016] [Indexed: 01/13/2023]
Abstract
Intestinal barrier injury has been reported to play a vital role in the pathogenesis of endotoxemia. This study aimed to investigate the protective effect of GYY4137, a newly synthesized H2S donor, on the intestinal barrier function in the context of endotoxemia both in vitro and in vivo. Caco-2 (a widely used human colon cancer cell line in the study of intestinal epithelial barrier function) monolayers incubated with lipopolysaccharide (LPS) or TNF-α/IFN-γ and a mouse model of endotoxemia were used in this study. The results suggested that GYY4137 significantly attenuated LPS or TNF-α/IFN-γ induced increased Caco-2 monolayer permeability. The decreased expression of TJ (tight junction) proteins induced by LPS and the altered localization of TJs induced by TNF-α/IFN-γ was significantly inhibited by GYY4137; similar results were obtained in vivo. Besides, GYY4137 promoted the clinical score and histological score of mice with endotoxemia. Increased level of TNF-α/IFN-γ in the plasma and increased apoptosis in colon epithelial cells was also attenuated by GYY4137 in mice with endotoxemia. This study indicates that GYY4137 preserves the intestinal barrier function in the context of endotoxemia via multipathways and throws light on the development of potential therapeutic approaches for endotoxemia.
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Affiliation(s)
- Shanwen Chen
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China
| | - Dingfang Bu
- Central Laboratory, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China
| | - Yuanyuan Ma
- Animal Experiment Center, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China
| | - Jing Zhu
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China
| | - Lie Sun
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China
| | - Shuai Zuo
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China
| | - Ju Ma
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China
| | - Tengyu Li
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China
| | - Zeyang Chen
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China
| | - Youwen Zheng
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China
| | - Xin Wang
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China
| | - Yisheng Pan
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China
| | - Pengyuan Wang
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China.
| | - Yucun Liu
- Division of General Surgery, Peking University First Hospital, Peking University, 8 Xi ShiKu Street, Beijing 100034, People's Republic of China.
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Chen Y, Fang F, Hu Y, Liu Q, Bu D, Tan M, Wu L, Zhu P. The Polymorphisms in LNK Gene Correlated to the Clinical Type of Myeloproliferative Neoplasms. PLoS One 2016; 11:e0154183. [PMID: 27111338 PMCID: PMC4844169 DOI: 10.1371/journal.pone.0154183] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Accepted: 04/11/2016] [Indexed: 01/10/2023] Open
Abstract
Objective LNK is an adapter protein negatively regulating the JAK/STAT cell signaling pathway. In this study, we observed the correlation between variation in LNK gene and the clinical type of myeloproliferative neoplasms (MPN). Methods A total of 285 MPN cases were recruited, including essential thrombocythemia (ET) 154 cases, polycythemia vera (PV) 76 cases, primary myelofibrosis (PMF) 19 cases, and chronic myeloid leukemia (CML) 36 cases. Ninety-three healthy individuals were used as normal controls. V617F mutation in JAK2 was identified by allele-specific PCR method, RT-PCR was used for the detection of BCR/ABL1 fusion gene, and mutations and variations in coding exons and their flanking sequences of LNK gene were examined by PCR-sequencing. Results Missense mutations of A300V, V402M, and R415H in LNK were found in 8 patients including ET (4 cases, all combined with JAK2-V617F mutation), PV (2 cases, one combined with JAK2-V617F mutation), PMF (one case, combined with JAK2-V617F mutation) and CML (one case, combined with BCR/ABL1 fusion gene). The genotype and allele frequencies of the three SNPs (rs3184504, rs111340708 and rs78894077) in LNK were significantly different between MPN patients and controls. For rs3184504 (T/C, in exon2), the T allele (p.262W) and TT genotype were frequently seen in ET, PV and PMF (P<0.01), and C allele (p.262R) and CC genotype were frequently seen in CML (P<0.01). For rs78894077 (T/C, in exon1), the T allele (p.242S) was frequently found in ET (P<0.05). For rs111340708 (TGGGGx5/TGGGGx4, in intron 5), the TGGGG x4 allele was infrequently found in ET, PMF and CML(P<0.01). Conclusion Mutations in LNK could be found in some of MPN patients in the presence or absence of JAK2-V617F mutation. Several polymorphisms in LNK gene may affect the clinical type or the genetic predisposition of MPN.
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MESH Headings
- 3' Flanking Region
- 5' Flanking Region
- Adaptor Proteins, Signal Transducing
- Adult
- Aged
- Alleles
- Base Sequence
- Case-Control Studies
- Exons
- Female
- Fusion Proteins, bcr-abl/genetics
- Fusion Proteins, bcr-abl/metabolism
- Gene Expression Regulation
- Gene Frequency
- Genetic Predisposition to Disease
- Genotype
- Hematopoietic Stem Cells/metabolism
- Hematopoietic Stem Cells/pathology
- Humans
- Intracellular Signaling Peptides and Proteins
- Janus Kinase 2/genetics
- Janus Kinase 2/metabolism
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/diagnosis
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/metabolism
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/pathology
- Male
- Middle Aged
- Mutation
- Open Reading Frames
- Phenotype
- Polycythemia Vera/diagnosis
- Polycythemia Vera/genetics
- Polycythemia Vera/metabolism
- Polycythemia Vera/pathology
- Polymorphism, Single Nucleotide
- Primary Myelofibrosis/diagnosis
- Primary Myelofibrosis/genetics
- Primary Myelofibrosis/metabolism
- Primary Myelofibrosis/pathology
- Proteins/genetics
- Proteins/metabolism
- Signal Transduction
- Thrombocythemia, Essential/diagnosis
- Thrombocythemia, Essential/genetics
- Thrombocythemia, Essential/metabolism
- Thrombocythemia, Essential/pathology
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Affiliation(s)
- Yan Chen
- Department of Hematology, Peking University First Hospital, Beijing, China
- Zunyi Medical College Affiliated Hospital, Zunyi, Guizhou, China
| | - Fang Fang
- Department of Hematology, Peking University First Hospital, Beijing, China
| | - Yang Hu
- Department of Hematology, Peking University First Hospital, Beijing, China
| | - Qian Liu
- Department of Hematology, Peking University First Hospital, Beijing, China
| | - Dingfang Bu
- Department of Hematology, Peking University First Hospital, Beijing, China
| | - Mei Tan
- Zunyi Medical College Affiliated Hospital, Zunyi, Guizhou, China
| | - Liusong Wu
- Zunyi Medical College Affiliated Hospital, Zunyi, Guizhou, China
| | - Ping Zhu
- Department of Hematology, Peking University First Hospital, Beijing, China
- * E-mail:
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29
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Zhang Y, Ma Y, Bu D, Liu H, Xia C, Zhang Y, Zhu S, Zheng X, Pei P, Wang S, Xu Y, Pan H, Qi Y. [Analysis of the relationship between mitochondrial DNA deletion and clinical complexity of mitochondrial disease]. Zhonghua Yi Xue Za Zhi 2015; 95:3449-3453. [PMID: 26813137] [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: 06/05/2023]
Abstract
OBJECTIVE To analyze the relationship between proportion of mitochondrial DNA 4 977 bp deletion (ΔmtDNA(4977)) or copy number in blood and the clinical complexity to find the pathogenesis of mitochondrial disease. METHODS A total of 160 patients with mitochondrial disease and 101 healthy controls of Peking University First Hospital from December 2003 to December 2013 were collected in this study. Their peripheral blood showed no hot-point mutation which detected by polymerase chain reaction-restriction fragment length polymorphism. All the patients were divided into younger group (age<10y) and elder group (10y≤age<20y). The incidence of ΔmtDNA(4977) was detected by real-time quantitative PCR. Internal gene was used to calculate the number of mitochondrial DNA in each cell. Statistical analysis were carried out by the independent t-test, one-way ANOVA and Spearman's bivariate correlation analysis. RESULTS ΔmtDNA (4977) proportion in the younger group was (2.66 ± 0.63)% and in the elder group was (3.09 ± 0.74)%, both of them were higher than that of healthy control group with the same age (the younger group: t=8.57, P<0.01; the elder group: t=4.38, P<0.01); ΔmtDNA(4977) copy number per cell in the younger group was (2.79 ± 0.50) copy and in the elder group was (2.97 ± 0.48) copy, both of them were higher than that of healthy control group with the same age (the younger group: t=4.50, P<0.01; the elder group: t=-3.67, P<0.01). The ΔmtDNA (4977) proportion was positively correlated with the complexity of the mitochondrial disease(the younger group: r=0.519, P<0.01; the elder group: r=0.772, P<0.01). The ΔmtDNA (4977) copy number per cell was positively correlated with the complexity of the mitochondrial disease(the younger group: r=0.389, P<0.01; the elder group: r=0.607, P<0.05). However, the total mtDNA copy number per cell was negatively correlated with the complexity of the mitochondrial disease (the younger group: r=-0.260, P<0.01; the elder group: r=-0.430, P<0.05). CONCLUSIONS The proportion or copy number of ΔmtDNA (4977) or total mtDNA copy number in blood are correlated with the complexity of mitochondrial diseases, especially the proportion of ΔmtDNA (4977).
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Affiliation(s)
- Yanchun Zhang
- Department of Perinatal Health Care, Beijing Obstetrics and Gynecology Hospital, Capital Medical University Beijing Maternal and Child Health Care Hospital, Beijing 100026, China
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Zhang Y, Ma Y, Bu D, Liu H, Xia C, Zhang Y, Zhu S, Pan H, Pei P, Zheng X, Wang S, Xu Y, Qi Y. Deletion of a 4977-bp Fragment in the Mitochondrial Genome Is Associated with Mitochondrial Disease Severity. PLoS One 2015; 10:e0128624. [PMID: 26024530 PMCID: PMC4449107 DOI: 10.1371/journal.pone.0128624] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Accepted: 04/30/2015] [Indexed: 12/22/2022] Open
Abstract
Large deletions in mitochondrial DNA (mtDNA) may be involved in the pathogenesis of mitochondrial disease. In this study, we investigated the relationship between a 4,977-bp deletion in the mitochondrial genome (ΔmtDNA4977) and the severity of clinical symptoms in patients with mitochondrial disease lacking known point mutations. A total of 160 patients with mitochondrial disease and 101 healthy controls were recruited for this study. The copy numbers of ΔmtDNA4977 and wild-type mtDNA were determined by real-time quantitative PCR and analyzed using Spearman’s bivariate correlation analysis, t-tests, or one-way ANOVA. The overall ΔmtDNA4977 copy number per cell and the proportion of mtDNA4977 relative to the total wild-type mtDNA, increased with patient age and symptom severity. Surprisingly, the total mtDNA copy number decreased with increasing symptom severity. Our analyses revealed that increases in the proportion and total copy number of ΔmtDNA4977 in the blood may be associated with disease severity in patients with mitochondrial dysfunction.
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Affiliation(s)
- Yanchun Zhang
- Department of Central Laboratory, Peking University First Hospital, No. 8, West District, Beijing, 100034, China
| | - Yinan Ma
- Department of Central Laboratory, Peking University First Hospital, No. 8, West District, Beijing, 100034, China
- * E-mail: (YM); (YQ)
| | - Dingfang Bu
- Department of Central Laboratory, Peking University First Hospital, No. 8, West District, Beijing, 100034, China
| | - Hui Liu
- Department of Respiratory, Beijing Children’s Hospital, Beijing, 100045, China
| | - Changyu Xia
- Department of Clinical Laboratory, Peking University First Hospital, No. 8, West District, Beijing, 100034, China
| | - Ying Zhang
- Department of Central Laboratory, Peking University First Hospital, No. 8, West District, Beijing, 100034, China
| | - Sainan Zhu
- Department of Biostatistics, Peking University First Hospital, No. 8, West District, Beijing, 100034, China
| | - Hong Pan
- Department of Central Laboratory, Peking University First Hospital, No. 8, West District, Beijing, 100034, China
| | - Pei Pei
- Department of Central Laboratory, Peking University First Hospital, No. 8, West District, Beijing, 100034, China
| | - Xuefei Zheng
- Department of Central Laboratory, Peking University First Hospital, No. 8, West District, Beijing, 100034, China
| | - Songtao Wang
- Department of Central Laboratory, Peking University First Hospital, No. 8, West District, Beijing, 100034, China
| | - Yufeng Xu
- Department of Central Laboratory, Peking University First Hospital, No. 8, West District, Beijing, 100034, China
| | - Yu Qi
- Department of Central Laboratory, Peking University First Hospital, No. 8, West District, Beijing, 100034, China
- * E-mail: (YM); (YQ)
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Yang L, Chen X, Liu H, Chen Y, Zhao Y, Bu D, Zhu P. Donors with HLA-B*58:01/TNFα −308A haplotype are unfavorable to haploidentical hematopoietic stem cell transplantation in acute lymphoblastic leukemia. Transpl Immunol 2015; 32:92-8. [DOI: 10.1016/j.trim.2014.12.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Revised: 12/17/2014] [Accepted: 12/17/2014] [Indexed: 01/28/2023]
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Zhao S, Zhao J, Bu D, Sun P, Wang J, Dong Z. Metabolomics analysis reveals large effect of roughage types on rumen microbial metabolic profile in dairy cows. Lett Appl Microbiol 2014; 59:79-85. [DOI: 10.1111/lam.12247] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Revised: 03/06/2014] [Accepted: 03/06/2014] [Indexed: 11/30/2022]
Affiliation(s)
- S. Zhao
- State Key Laboratory of Microbial Resources; Institute of Microbiology; Chinese Academy of Sciences; Beijing China
- State Key Laboratory of Animal Nutrition; Institute of Animal Sciences; Chinese Academy of Agricultural Sciences; Beijing China
| | - J. Zhao
- State Key Laboratory of Animal Nutrition; Institute of Animal Sciences; Chinese Academy of Agricultural Sciences; Beijing China
- College of Animal Science and Technology; Inner Mongolia University for the Nationalities; Tongliao Inner Mongolia China
| | - D. Bu
- State Key Laboratory of Animal Nutrition; Institute of Animal Sciences; Chinese Academy of Agricultural Sciences; Beijing China
| | - P. Sun
- State Key Laboratory of Animal Nutrition; Institute of Animal Sciences; Chinese Academy of Agricultural Sciences; Beijing China
| | - J. Wang
- State Key Laboratory of Animal Nutrition; Institute of Animal Sciences; Chinese Academy of Agricultural Sciences; Beijing China
| | - Z. Dong
- State Key Laboratory of Microbial Resources; Institute of Microbiology; Chinese Academy of Sciences; Beijing China
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Wang X, Zhang N, Ning X, Li T, Wu P, Peng S, Fan Y, Bu D, Gong K. Higher Prevalence of Novel Mutations in VHL Gene in Chinese Von Hippel-Lindau Disease Patients. Urology 2014; 83:675.e1-5. [DOI: 10.1016/j.urology.2013.09.069] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Revised: 09/05/2013] [Accepted: 09/27/2013] [Indexed: 12/16/2022]
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Wang X, Gong K, Ning X, Li T, Wu P, Peng S, Fan Y, Bu D, Zhang N, Ning X. Reply. Urology 2014. [DOI: 10.1016/j.urology.2013.09.071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Tang C, Zhang J, Li L, Zhao Q, Bu D. Ractopamine Residues in Urine, Plasma and Hair of Cattle During and After Treatment. J Anal Toxicol 2014; 38:149-54. [DOI: 10.1093/jat/bku006] [Citation(s) in RCA: 16] [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: 11/13/2022] Open
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36
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Du J, Huang Y, Yan H, Zhang Q, Zhao M, Zhu M, Liu J, Chen SX, Bu D, Tang C, Jin H. Hydrogen sulfide suppresses oxidized low-density lipoprotein (ox-LDL)-stimulated monocyte chemoattractant protein 1 generation from macrophages via the nuclear factor κB (NF-κB) pathway. J Biol Chem 2014; 289:9741-53. [PMID: 24550391 DOI: 10.1074/jbc.m113.517995] [Citation(s) in RCA: 108] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
This study was designed to examine the role of hydrogen sulfide (H2S) in the generation of oxidized low-density lipoprotein (ox-LDL)-stimulated monocyte chemoattractant protein 1 (MCP-1) from macrophages and possible mechanisms. THP-1 cells and RAW macrophages were pretreated with sodium hydrosulfide (NaHS) and hexyl acrylate and then treated with ox-LDL. The results showed that ox-LDL treatment down-regulated the H2S/cystathionine-β-synthase pathway, with increased MCP-1 protein and mRNA expression in both THP-1 cells and RAW macrophages. Hexyl acrylate promoted ox-LDL-induced inflammation, whereas the H2S donor NaHS inhibited it. NaHS markedly suppressed NF-κB p65 phosphorylation, nuclear translocation, DNA binding activity, and recruitment to the MCP-1 promoter in ox-LDL-treated macrophages. Furthermore, NaHS decreased the ratio of free thiol groups in p65, whereas the thiol reductant DTT reversed the inhibiting effect of H2S on the p65 DNA binding activity. Most importantly, site-specific mutation of cysteine 38 to serine in p65 abolished the effect of H2S on the sulfhydration of NF-κB and ox-LDL-induced NF-κB activation. These results suggested that endogenous H2S inhibited ox-LDL-induced macrophage inflammation by suppressing NF-κB p65 phosphorylation, nuclear translocation, DNA binding activity, and recruitment to the MCP-1 promoter. The sulfhydration of free thiol group on cysteine 38 in p65 served as a molecular mechanism by which H2S inhibited NF-κB pathway activation in ox-LDL-induced macrophage inflammation.
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Affiliation(s)
- Junbao Du
- From the Department of Pediatrics and
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37
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Li L, Liu D, Bu D, Chen S, Wu J, Tang C, Du J, Jin H. Brg1-dependent epigenetic control of vascular smooth muscle cell proliferation by hydrogen sulfide. Biochimica et Biophysica Acta (BBA) - Molecular Cell Research 2013; 1833:1347-55. [DOI: 10.1016/j.bbamcr.2013.03.002] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2012] [Revised: 03/02/2013] [Accepted: 03/03/2013] [Indexed: 12/19/2022]
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38
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Gong K, Wu P, Zhang N, Wang X, Ning X, Li T, Bu D. 739 CLINICAL CHARACTERISTICS OF VON HIPPEL-LINDAU DISEASE IN CHINESE PATIENTS. J Urol 2013. [DOI: 10.1016/j.juro.2013.02.302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Kan Gong
- Beijing, China, People's Republic of
| | | | | | - Xi Wang
- Beijing, China, People's Republic of
| | | | - Teng Li
- Beijing, China, People's Republic of
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Wu P, Zhang N, Wang X, Li T, Ning X, Bu D, Gong K. Mosaicism in von Hippel-Lindau disease with severe renal manifestations. Clin Genet 2013; 84:581-4. [PMID: 23384228 DOI: 10.1111/cge.12092] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2012] [Revised: 01/03/2013] [Indexed: 12/13/2022]
Abstract
von Hippel-Lindau (VHL) disease is an inheritable multisystem tumor syndrome characterized by multiple benign and malignant tumors affecting multiple organs. VHL is the result of a germline mutation in the VHL tumor suppressor gene. Molecular genomic analysis routinely confirms the clinical diagnosis. However, the use of molecular diagnostic methods can often be insufficient for the detection of mosaic germline VHL mutations, making the diagnosis of some cases of VHL difficult. Here, we report the case of a VHL mosaic patient with bilateral renal lesions in the absence of other VHL-associated lesions. A VHL mutation was not originally detected by routine molecular testing. Nonetheless, the detection of a heterozygous c.194C>G (p.Ser65Trp) VHL mutation in the patient's daughter prompted further genetic assessment and eventually resulted in the finding of a mosaic c.194C>G (p.Ser65Trp) VHL mutation in the patient. The mutation rate was 18.8 ± 3.84% in peripheral leukocytes. As the frequency of VHL mosaicism remains underdetermined, the possibility of a diagnosis of mosaic VHL should be considered in patients with both typical and atypical VHL-associated manifestations.
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Affiliation(s)
- P Wu
- Department of Urology, Peking University First Hospital, Institute of Urology, Peking University, National Urological Cancer Center, Beijing, China
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Wang M, Moisá S, Khan MJ, Wang J, Bu D, Loor JJ. MicroRNA expression patterns in the bovine mammary gland are affected by stage of lactation. J Dairy Sci 2012; 95:6529-35. [PMID: 22959945 DOI: 10.3168/jds.2012-5748] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Accepted: 07/26/2012] [Indexed: 01/08/2023]
Abstract
The objective of this work was to determine the expression pattern of microRNA (miR) associated with cellular proliferation, lipid metabolism, and innate immunity in dairy cow mammary gland tissue at different stages of lactation. The expression of miR-10a, miR-15b, miR-16, miR-21, miR-31, miR-33b, miR-145, miR-146b, miR-155, miR-181a, miR-205, miR-221, and miR-223 was studied by real-time reverse-transcription PCR in tissue (n=7/stage) harvested via repeated biopsies during the dry period (-30 d prepartum), the fresh period (7 d postpartum), and early lactation (30 d postpartum). Except for miR-31, all miR studied increased in expression between the dry and fresh periods. Among those upregulated, the expression of miR-221 increased further at early lactation, suggesting a role in the control of endothelial cell proliferation or angiogenesis, whereas the expression of miR-223 decreased at early lactation but to a level that was greater than in the dry period, suggesting it could play a role in the mammary response to pathogens soon after parturition. The expression of miR-31, a hormonally regulated miR that inhibits cyclin gene expression, was greater at early lactation compared with the dry period. From a metabolic standpoint, the consistent upregulation of miR-33b during early lactation compared with the dry period suggests that this miR may exert some control over lipogenesis in mammary tissue. Overall, results indicate that expression of miR associated with transcriptional regulation of genes across diverse biological functions is altered by stage of lactation. The specific roles of these miR during lactation will require further research.
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Affiliation(s)
- M Wang
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
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41
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Zhang Q, Yan H, Zhao M, Bu D, Tang C, Du J, Jin H. P17 Hydrogen sulfide suppresses ox-LDL-stimulatedmonocyte chemoattractant protein-1 generation from macrophages via NF-κB pathway. Nitric Oxide 2012. [DOI: 10.1016/j.niox.2012.08.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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42
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Lin Z, Chen Q, Lee M, Cao X, Zhang J, Ma D, Chen L, Hu X, Wang H, Wang X, Zhang P, Liu X, Guan L, Tang Y, Yang H, Tu P, Bu D, Zhu X, Wang K, Li R, Yang Y. Exome sequencing reveals mutations in TRPV3 as a cause of Olmsted syndrome. Am J Hum Genet 2012; 90:558-64. [PMID: 22405088 DOI: 10.1016/j.ajhg.2012.02.006] [Citation(s) in RCA: 229] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2011] [Revised: 12/30/2011] [Accepted: 02/07/2012] [Indexed: 01/27/2023] Open
Abstract
Olmsted syndrome (OS) is a rare congenital disorder characterized by palmoplantar and periorificial keratoderma, alopecia in most cases, and severe itching. The genetic basis for OS remained unidentified. Using whole-exome sequencing of case-parents trios, we have identified a de novo missense mutation in TRPV3 that produces p.Gly573Ser in an individual with OS. Nucleotide sequencing of five additional affected individuals also revealed missense mutations in TRPV3 (which produced p.Gly573Ser in three cases and p.Gly573Cys and p.Trp692Gly in one case each). Encoding a transient receptor potential vanilloid-3 cation channel, TRPV3 is primarily expressed in the skin, hair follicles, brain, and spinal cord. In transfected HEK293 cells expressing TRPV3 mutants, much larger inward currents were recorded, probably because of the constitutive opening of the mutants. These gain-of-function mutations might lead to elevated apoptosis of keratinocytes and consequent skin hyperkeratosis in the affected individuals. Our findings suggest that TRPV3 plays essential roles in skin keratinization, hair growth, and possibly itching sensation in humans and selectively targeting TRPV3 could provide therapeutic potential for keratinization or itching-related skin disorders.
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43
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Wu P, Zhang N, Wang X, Ning X, Li T, Bu D, Gong K. Family history of von Hippel-Lindau disease was uncommon in Chinese patients: suggesting the higher frequency of de novo mutations in VHL gene in these patients. J Hum Genet 2012; 57:238-43. [PMID: 22357542 DOI: 10.1038/jhg.2012.10] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Von Hippel-Lindau (VHL) disease is an autosomal dominant familial cancer syndrome caused by germline mutations in VHL tumor suppressor gene. It is characterized by hemangioblastoma in central nervous system and retina, renal cell carcinoma or cyst, pheochromocytoma, pancreatic cyst and tumor, endolymphatic-sac tumor, and papillary cystadenoma in epididymis and broad ligament. Here, we used PCR-direct sequencing and universal primer quantitative fluorescent multiplex PCR (UPQFM-PCR) to detect VHL mutations in 16 patients clinically diagnosed with VHL disease. PCR-direct sequencing detected 12 germline mutations (75%, 12/16), in which a novel mutation of c.451A>T/p.Ile151Phe found in one proband had not been reported previously. UPQFM-PCR found two large deletions (12.5%, 2/16). The two remaining patients carried non-typical disease-causing mutations, including one silent mutation (c.481C>A/p.Arg161Arg) and one mutation in 3'-UTR (c.642+70C>A). Remarkably, 56.3% (9/16) probands did not have family history of VHL disease, suggesting the higher frequency of de novo mutations in Chinese patients. We also summarized Chinese VHL disease patients with VHL mutation findings published in the literature to provide information about the spectrum of VHL mutations in Chinese VHL disease patients.
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Affiliation(s)
- Pengjie Wu
- Institute of Urology, Peking University, Beijing, PR China
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44
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Sun H, Liu Y, Bu D, Liu X, Norris JS, Xiao S. Efficient growth suppression and apoptosis in human laryngeal carcinoma cell line HEP-2 induced by an adeno-associated virus expressing human FAS ligand. Head Neck 2012; 34:1628-33. [PMID: 22267220 DOI: 10.1002/hed.21985] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2011] [Revised: 08/03/2011] [Accepted: 09/08/2011] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Apoptosis induced by Fas/FasL system has been proposed as a gene therapy methold for various cancers. METHODS We used adeno-associated virus-expressing enhanced green fluorescent protein (EGFP)-human FasL (AAV-EGFP-hFasL) to deliver FasL into Hep-2 cells, cytotoxicity was detected by MTS assay , apoptosis was confirmed by flow cytometry. We also treated the xenograft of Hep-2 tumor in nude mice with intratumoral injection of AAV-EGFP-hFasL. The size of the xenograft, the apoptosis in the xenograft, and the survival rate of the inoculated mice were then evaluated. RESULTS Hep-2 cells infected with AAV-EGFP-hFasL showed increased apoptosis rate and killing effect compared with AAV-EGFP-infected cells. In addition intratumoral injections of AAV-EGFP-hFasL into Hep-2 xenografts induced significant growth suppression of tumors. CONCLUSION Our findings suggest that the introduction of FasL into head and neck squamous cell carcinoma may induce significant apoptosis, and adeno-associated virus may be a useful vehicle for gene therapy.
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Affiliation(s)
- Haili Sun
- Department of Otolaryngology-Head & Neck Surgery, Peking University First Hospital, Beijing, China
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Abstract
CONCLUSION Fas ligand (FasL) gene therapy may provide a new efficient therapeutic model for head and neck squamous cell cancer (HNSCC). Acid ceramidase (AC) may not play an important role in the sensitivity of HNSCC cell lines to Fas-induced apoptosis. OBJECTIVES The aims of this study were to investigate the efficacy of FasL gene therapy for HNSCC in vitro and to determine whether the expression of AC in different kinds of HNSCC cell lines is related to the sensitivity of HNSCC cell lines to Fas-mediated apoptotic induction. METHODS Three HNSCC cell lines (Hep-2, MMSI, and SCCVII) were transfected with pEGFP-FasL, a plasmid containing a modified human FasL gene fused to enhanced green fluorescent protein (GFP). pEGFP-C1, a plasmid containing the GFP gene alone, was used as a control. Cell death was observed by fluorescence imaging and quantified using a tetrazolium-based (MTS) assay. SCCVII cells were analyzed by flow cytometry to determine the presence of apoptotic induction. Hep-2 and MMSI cells were evaluated by quantitative real-time PCR to evaluate the expression of AC. RESULTS Transfection of pEGFP-FasL plasmid was shown to be able to induce cell death, the sensitivity of Fas-mediated apoptosis in HNSCC was different, and the level of AC did not correlate with the sensitivity of HNSCC cells to Fas-induced apoptosis.
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Affiliation(s)
- Xiaojun Ji
- Department of Otolaryngology-Head & Neck Surgery, Peking University First Hospital, Beijing, China
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46
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Cao Y, Ma Y, Zhang Y, Li Y, Fang F, Wang S, Bu D, Xu Y, Pei P, Li L, Xiao Y, Wu H, Yang Y, Zou L, Qi Y. Detection of eight frequently encountered point mutations in mitochondria in Chinese patients suggestive of mitochondrial encephalomyopathies. Mitochondrion 2010; 10:330-4. [DOI: 10.1016/j.mito.2010.01.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2009] [Revised: 01/20/2010] [Accepted: 01/26/2010] [Indexed: 12/22/2022]
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47
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Cao X, Lin Z, Yang H, Bu D, Tu P, Chen L, Wu H, Yang Y. New mutations in the transglutaminase 1 gene in three families with lamellar ichthyosis. Clin Exp Dermatol 2009; 34:904-9. [PMID: 19486042 DOI: 10.1111/j.1365-2230.2009.03288.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Autosomal recessive lamellar ichthyosis (LI) is a severe skin disorder characterized by generalized hyperkeratosis. Gene mutation in transglutaminase 1 (TGM1), which mediates cross-links in the formation of the cell envelope during terminal differentiation of epidermis, has been identified as a cause of LI. OBJECTIVES To determine mutations of TGM1 gene in three Chinese families with LI. METHODS The TGM1 gene was sequenced to identify disease-causing mutations in the three families with LI. One of the results was confirmed by using reverse transcriptase PCR and in situ hybridization. An in situ transglutaminase (TGase) 1 assay was performed to estimate TGase 1 activity in the patients' skin. RESULTS Four novel mutations of keratinocyte TGase1 (Q203X, D254N, R687H and IVS4 + 1G-->T) were found in the three families. No TGase 1 mRNA was detected in patient skin using RT-PCR and in situ hybridization, and the in situ TGase assay showed that there was no or decreased TGase 1 activity in patient skin. CONCLUSIONS Our findings suggest that four novel mutations in TGM1 gene result in decrease or absence of TGase activity in the skin and, as a consequence, cause the phenotype of LI.
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Affiliation(s)
- X Cao
- Department of Dermatology, First Affiliated Hospital of Nan Chang University, Nan Chang, China
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48
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49
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Liu L, Wang J, Bu D, Liu S, Liang S, Liu K, Wei H, Zhou L. Influence of docosahexaenoic acid on the
concentration of fatty acids and volatile fatty acids
in rumen fluid analysed by a rumen-simulation
techniques. J Anim Feed Sci 2009. [DOI: 10.22358/jafs/66376/2009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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50
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Lewis CM, Bu D, Euhus DM. Obesity, insulin resistance and oxidative stress: implication for breast carcinogenesis. Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-6025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Abstract #6025
Background: Obesity is associated with a modest increase in the risk of postmenopausal breast cancer (RR = 1.5 – 2.0); but, because nearly a third of the U.S. population is obese, the population attributable risk is estimated at 15%. Obesity can cause insulin resistance culminating in Type II diabetes. Notably, breast cancer incidence is significantly increased in the years preceding a diagnosis of type II diabetes. Because IGFBP-1 expression is tightly regulated by insulin, it is an excellent marker of insulin resistance in healthy individuals.
 Methods: These data are based on well-annotated prospectively acquired baseline blood and breast tissue samples from 72 high risk women between the ages of 37 and 86 years who participated in a chemoprevention trial. None of the women had been diagnosed with Type II diabetes. Women with plasma IGFBP1 levels in the lowest tertile (mean 2.1 ng/ml) were classified as insulin-resistant.
 Results: Plasma IGFBP1 was strongly inversely correlated with BMI (R2 = 0.247, P < 0.0001). Insulin-resistant women had marginally higher mean plasma free estradiol levels than women not classified as insulin-resistant (2.13 x 10-12M versus 1.53 x 10-12M, P = 0.072). There was no difference in plasma IGF1, IGF2, or IGFBP3 levels. Illumina whole genome expression microarray data was available for breast tissue from 55 women. Women classified as insulin-resistant showed evidence of an adaptive response to oxidative stress based on significant upregulation of NQO1, GSTK1, CYP4ZP2, and SRXN1 (P < 0.001).
 Conclusions: Marginally increased circulating estradiol may contribute to the increased breast cancer risk observed in insulin-resistant women. However, insulin resistance increases oxidative stress in breast tissue and may promote carcinogenesis through induction of oxidative DNA damage.
Citation Information: Cancer Res 2009;69(2 Suppl):Abstract nr 6025.
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Affiliation(s)
- CM Lewis
- 1 Department of Surgery, University of Texas Southwestern Medical Center, Dallas, TX
| | - D Bu
- 1 Department of Surgery, University of Texas Southwestern Medical Center, Dallas, TX
| | - DM Euhus
- 1 Department of Surgery, University of Texas Southwestern Medical Center, Dallas, TX
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