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Liu YK, Liu LS, Zhu BC, Chen XF, Tian LH. Sp1-mediated miR-193b suppresses atopic dermatitis by regulating HMGB1. Kaohsiung J Med Sci 2023; 39:769-778. [PMID: 37166084 DOI: 10.1002/kjm2.12693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 03/24/2023] [Accepted: 04/09/2023] [Indexed: 05/12/2023] Open
Abstract
Atopic dermatitis (AD) is a chronic and recurrent inflammatory skin disease. Keratinocyte dysfunction plays a central role in AD development. MicroRNA is a novel player in many inflammatory and immune skin diseases. In this study, we investigated the potential function and regulatory mechanism of miR-193b in AD. Inflamed human keratinocytes (HaCaT) were established by tumor necrosis factor (TNF)-α/interferon (IFN)-γ stimulation. Cell viability was measured using MTT assay, while the cell cycle was analyzed using flow cytometry. The cytokine levels were examined by enzyme-linked immunosorbent assay. The interaction between Sp1, miR-193b, and HMGB1 was analyzed using dual luciferase reporter and/or chromatin immunoprecipitation (ChIP) assays. Our results revealed that miR-193b upregulation enhanced the proliferation of TNF-α/IFN-γ-treated keratinocytes and repressed inflammatory injury. miR-193b negatively regulated high mobility group box 1 (HMGB1) expression by directly targeting HMGB1. Furthermore, HMGB1 knockdown promoted keratinocyte proliferation and inhibited inflammatory injury by repressing nuclear factor kappa-B (NF-κB) activation. During AD progression, HMGB1 overexpression abrogated increase of keratinocyte proliferation and repression of inflammatory injury caused by miR-193b overexpression. Moreover, transcription factor Sp1 was identified as the biological partner of the miR-193b promoter in promoting miR-193b expression. Therefore, Sp1 upregulation promotes keratinocyte proliferation and represses inflammatory injury during AD development via promoting miR-193b expression and repressing HMGB1/NF-κB activation.
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Affiliation(s)
- Ying-Ke Liu
- Department of Dermatology, The Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, Changsha, Hunan Province, People's Republic of China
| | - Lei-Shan Liu
- Department of Dermatology, The Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, Changsha, Hunan Province, People's Republic of China
| | - Bo-Chen Zhu
- Department of Dermatology, The Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, Changsha, Hunan Province, People's Republic of China
| | - Xiu-Fang Chen
- Department of Dermatology, The Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, Changsha, Hunan Province, People's Republic of China
| | - Li-Hong Tian
- Department of Dermatology, The Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, Changsha, Hunan Province, People's Republic of China
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Yan BR, Ai XH, Liu M, Tian LH, Liang Y, Teng CB. Study on Lgr5 expression in pancreas tissues and organoids by lineage tracing. Yi Chuan 2022; 44:432-441. [PMID: 35729700 DOI: 10.16288/j.yczz.22-022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Leucine rich repeat containing G protein-coupled receptor 5(Lgr5) is widely expressed in multiple tissues and can be used as a stem cell marker in a variety of epithelial organs (including the small intestine, colon, stomach and hair follicles). In this study, we used Lgr5-CreERT2+/- and Rosa26-mTmG hybridized transgenic mice to investigate the expression of Lgr5 in both ductal epithelial cells during pancreas development and in vitro cultured pancreatic duct organoids. After induction with Tamoxifen, the Lgr5 expression was analyzed by detecting the enhanced green fluorescence protein in the pancreatic tissue sections in adult animals and embryos at different developmental stages. The results showed that Lgr5 expression was detected neither in adult pancreatic duct epithelia nor in the embryonic pancreatic tissues at day 15.5 or in newborn mice. However, when 4-hydroxy-Tamoxifen was supplemented to the culture medium, EGFP could be detected in the primary pancreatic duct organoids from Lgr5-Cre ERT2+/-; Rosa26-mTmG mice. These results suggested that Lgr5 was not expressed in adult and embryonic pancreatic tissues; but could be expressed in the cultured pancreas ductal organoids. The research lays the foundation for exploring specific gene expression patterns in stem/progenitor cells during pancreatic development.
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Affiliation(s)
- Bing-Ru Yan
- College of Life Science, Northeast Forestry University, Harbin 150040, China
| | - Xian-Hui Ai
- College of Life Science, Northeast Forestry University, Harbin 150040, China
| | - Miao Liu
- College of Life Science, Northeast Forestry University, Harbin 150040, China
| | - Li-Hong Tian
- College of Wildlife and Protected Area, Northeast Forestry University, Harbin 150040, China
| | - Yang Liang
- College of Life Science, Northeast Forestry University, Harbin 150040, China
| | - Chun-Bo Teng
- College of Life Science, Northeast Forestry University, Harbin 150040, China
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3
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Tian LH, Dong ZG, Chen XY, Huang LJ, Xiao PP. Brucellosis of unknown origin with haemophagocytic syndrome: A case report. World J Clin Cases 2021; 9:3649-3654. [PMID: 34046465 PMCID: PMC8130082 DOI: 10.12998/wjcc.v9.i15.3649] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 01/27/2021] [Accepted: 03/16/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Brucellosis is a contagious bacterial disease caused by Brucella species, which is a leading zoonotic disease worldwide. Most patients with brucellosis have a clear infection source; however, our case had a rare presentation of secondary haemophagocytic lymphohistiocytosis without any epidemiological history.
CASE SUMMARY A 50-year-old man was admitted to our hospital with a fever of unknown origin. After laboratory examinations, such as blood culture and bone marrow biopsy, the patient was diagnosed with brucellosis and secondary haemophagocytic lymphohistiocytosis. After antibiotic therapy, the patient was afebrile, and his haemogram recovered to normal, after which he was discharged.
CONCLUSION Brucellosis cannot be excluded in patients with clinically unexplained fever, even in those without epidemiologic history.
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Affiliation(s)
- Li-Hong Tian
- Department of Hematology and Rheumatology, The Second Affiliated Hospital of Xiamen Medical College, Xiamen 361021, Fujian Province, China
| | - Zhi-Gao Dong
- Department of Hematology and Rheumatology, The Second Affiliated Hospital of Xiamen Medical College, Xiamen 361021, Fujian Province, China
| | - Xu-Yan Chen
- Department of Hematology and Rheumatology, The Second Affiliated Hospital of Xiamen Medical College, Xiamen 361021, Fujian Province, China
| | - Lian-Jiang Huang
- Department of Laboratory, The Second Affiliated Hospital of Xiamen Medical College, Xiamen 361021, Fujian Province, China
| | - Ping-Ping Xiao
- Department of Hematology and Rheumatology, The Second Affiliated Hospital of Xiamen Medical College, Xiamen 361021, Fujian Province, China
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4
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Tian Y, Zhou S, Yin YH, Zheng YX, Wang RP, Liu XQ, Liu ZQ, Liu QF, Liu W, Pang J, Jiang Z, Tian LH, Huang J, Yang L. [Value of two left atrium and pulmonary vein stereoscopic imaging reconstruction methods on guiding radiofrequency ablation for atrial fibrillation]. Zhonghua Xin Xue Guan Bing Za Zhi 2017; 45:930-934. [PMID: 29166718 DOI: 10.3760/cma.j.issn.0253-3758.2017.11.007] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To compare the value of two 3D imaging reconstruction methods for left atria and pulmonary vein on guiding the catheter ablation for atrial fibrillation (AF). Methods: From January 2014 to January 2017, a total of 100 drug refractory paroxysmal AF patients were divided into left atria direct angiography group (n=50), and indirect angiography group (n=50). 3D CARTO system was applied for mapping and guiding the ablation procedure. Patients assigned to direct angiography group were treated as follows: intraoperative puncture of atrial septum, inject contrast agent directly into the left atrium, conduct left atrial and pulmonary venous rotation angiography, reconstruct three-dimensional image, integrate the image into real-time X-ray system to facilitate circumferential pulmonary vein isolation. Patients assigned into the indirect angiography group were treated as follows: inject contrast agent through the right ventricle, conduct delayed rotation angiography of the left atria and pulmonary vein to guide circumferential pulmonary vein fixation and ablation. The left atrial and pulmonary venous image acquisition, the operation and X-ray exposure time, the success rate and the incidence of complication of the two groups were compared. The patients were followed up for 3-6 months. Results: General clinical characteristics of the two groups were similar(all P>0.05). Ablation was successful in all 100 patients. The operation time[(112.0±21.4)min vs. (134.0±24.3)min]and X-ray exposure time((10.7±4.7)min vs. (15.8±5.2)min)were significantly lower in direct angiography group than in indirect angiography group (both P<0.01). There was no significant difference between the two groups in the immediate (86%(43/50) vs. 82%(41/50), P=0.59) and short-term (76%(38/50) vs. 72%(36/50), P=0.65) success rate and complication rate (1 aneurysm in the direct angiography group, 1 pericardial tamponade in the indirect angiography group). In-hospital mortality was zero percent. Conclusion: It is safe and effective method to guide the radiofrequency catheter ablation of paroxysmal atrial fibrillation by reconstruction 3D image of left atrium and pulmonary vein. Compared with indirect angiography group, direct angiography group can improve the imaging quality of left atrium and pulmonary vein, decrease the X-ray exposure time of the ablation procedure.
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Affiliation(s)
- Y Tian
- Department of Cardiology , Guizhou Provincial People's Hospital, People's Hospital of Guizhou Medical University, Guiyang 550002, China
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5
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Huang ZW, Tian LH, Yang B, Guo RM. Long Noncoding RNA H19 Acts as a Competing Endogenous RNA to Mediate CTGF Expression by Sponging miR-455 in Cardiac Fibrosis. DNA Cell Biol 2017; 36:759-766. [PMID: 28753062 DOI: 10.1089/dna.2017.3799] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [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: 02/05/2023] Open
Abstract
Cardiac fibrosis is closely related to multiple cardiovascular system diseases, and noncoding RNAs (ncRNAs), including long noncoding RNA (lncRNA) and microRNA (miRNA), have been reported to play a vital role in fibrogenesis. The present study aims to investigate the potential regulatory mechanism of lncRNA H19 and miR-455 on fibrosis-associated protein synthesis in cardiac fibroblasts (CFs). miRNA microarray assay revealed 34 significantly dysregulated miRNAs, including 13 upregulated miRNAs and 21 downregulated miRNAs. Among these aberrantly expressed miRNAs, we paid attention to miR-455, which was significantly downregulated in diabetic mouse myocardium and Ang II-induced CFs. Loss- and gain-of-function experiments showed that miR-455 expression levels were negatively correlated with collagen I and III expression in Ang II-induced CFs. Bioinformatic prediction programs (TargetScan, miRanda, starBase) predicted that miR-455 targeted connective tissue growth factor (CTGF) and H19 with complementary binding sites at the 3'-untranslated region, which was validated by luciferase reporter assay. Functional validation assay demonstrated that H19 knockdown could enhance the antifibrotic role of miR-455 and attenuate the CTGF expression and further decrease fibrosis-associated protein synthesis (collagen I, III, and α-SMA). The present study reveals a novel function of the H19/miR-455 axis targeting CTGF in cardiac fibrosis, suggesting its potential therapeutic role in cardiac diseases.
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Affiliation(s)
- Zhi-Wen Huang
- 1 Department of Cardiovascular, Affiliated Hospital of Guangdong Medical University , Zhanjiang, Guangdong, China
| | - Li-Hong Tian
- 1 Department of Cardiovascular, Affiliated Hospital of Guangdong Medical University , Zhanjiang, Guangdong, China
| | - Bin Yang
- 2 Center of Geriatrics, Affiliated Hospital of Guangdong Medical University , Zhanjiang, Guangdong, China
| | - Run-Min Guo
- 1 Department of Cardiovascular, Affiliated Hospital of Guangdong Medical University , Zhanjiang, Guangdong, China
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6
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Huang JL, Liu W, Tian LH, Chai TT, Liu Y, Zhang F, Fu HY, Zhou HR, Shen JZ. Upregulation of long non-coding RNA MALAT-1 confers poor prognosis and influences cell proliferation and apoptosis in acute monocytic leukemia. Oncol Rep 2017; 38:1353-1362. [PMID: 28713913 PMCID: PMC5549035 DOI: 10.3892/or.2017.5802] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 06/09/2017] [Indexed: 12/30/2022] Open
Abstract
Metastasis-associated lung adenocarcinoma transcript 1 (MALAT-1), a long non-coding RNA, has been documented to be a new prognostic marker and gene regulator in several types of cancer, but its potential involvement in acute myeloid leukemia (AML) remains unclear. This study investigated the expression and functional role of MALAT-1 in AML. MALAT-1 expression was assessed by real-time quantitative PCR. After lentiviral-mediated MALAT-1 knockdown, the proliferation of AML cells was determined by CCK-8 and colony formation assays. Cell cycle progression and apoptosis were evaluated by flow cytometry and the expression of caspase-3, −8 and −9 was assessed by western blot analysis. We found that MALAT-1 expression in patients with acute monocytic leukemia (M5) was significantly increased when compared with that of healthy controls, and the overall survival of M5 patients with high MALAT-1 expression was markedly reduced when compared with the overall survival of patients with low MALAT-1 expression. The analysis of cellular experiments showed that MALAT-1 silencing decreased the proliferation of M5 cells (U-937 and THP-1), inhibited cell cycle progression and increased apoptosis. Taken together, these findings suggest that high MALAT-1 expression is closely associated with poor prognosis in M5 patients and may play a role in leukemia cell proliferation and apoptosis, and may serve as a promising theranostic marker.
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Affiliation(s)
- Jin-Long Huang
- Fujian Institute of Hematology, Fujian Provincial Key Laboratory on Hematology, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, P.R. China
| | - Wei Liu
- Fujian Institute of Hematology, Fujian Provincial Key Laboratory on Hematology, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, P.R. China
| | - Li-Hong Tian
- Fujian Institute of Hematology, Fujian Provincial Key Laboratory on Hematology, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, P.R. China
| | - Ting-Ting Chai
- Fujian Institute of Hematology, Fujian Provincial Key Laboratory on Hematology, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, P.R. China
| | - Yang Liu
- Fujian Institute of Hematology, Fujian Provincial Key Laboratory on Hematology, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, P.R. China
| | - Feng Zhang
- Fujian Institute of Hematology, Fujian Provincial Key Laboratory on Hematology, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, P.R. China
| | - Hai-Ying Fu
- Fujian Institute of Hematology, Fujian Provincial Key Laboratory on Hematology, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, P.R. China
| | - Hua-Rong Zhou
- Fujian Institute of Hematology, Fujian Provincial Key Laboratory on Hematology, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, P.R. China
| | - Jian-Zhen Shen
- Fujian Institute of Hematology, Fujian Provincial Key Laboratory on Hematology, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, P.R. China
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7
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Zhang YY, Huang SH, Zhou HR, Chen CJ, Tian LH, Shen JZ. Role of HOTAIR in the diagnosis and prognosis of acute leukemia. Oncol Rep 2016; 36:3113-3122. [PMID: 27748863 PMCID: PMC5112607 DOI: 10.3892/or.2016.5147] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Accepted: 08/16/2016] [Indexed: 12/22/2022] Open
Abstract
HOX antisense intergenic RNA (HOTAIR), a long non-coding RNA, plays an important role in the development of many types of cancers. Its function in acute leukemia (AL), however, has not been examined. The present study investigated the role of HOTAIR and its downstream genes in AL, and determined whether it could act as a molecular marker for prediction of leukemia development and prognosis. Real-time quantitative PCR was used to examine the expression of each gene in the HOTAIR signaling pathway in AL patients. The relationship between expression of HOTAIR and downstream genes and AL prognosis was analyzed. Expression of HOTAIR in patients with acute monocytic leukemia (M5) was increased as compared to controls (P<0.05). Compared to patients with low HOTAIR expression, overall survival and event-free survival of patients with high HOTAIR expression was significantly reduced. In addition, the expression of downstream genes in the HOTAIR signaling pathway including EZH2, LSD1, DNMT3A and DNMT3B was significantly increased in AL patients, and showed a significant positive correlation with high expression of HOTAIR (P<0.05). In conclusion, HOTAIR was closely related with a poor prognosis in AL patients. It may be involved in the development of leukemia by mediating methylation of DNA and histones.
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MESH Headings
- Adolescent
- Adult
- Aged
- Aged, 80 and over
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/metabolism
- DNA (Cytosine-5-)-Methyltransferases/genetics
- DNA (Cytosine-5-)-Methyltransferases/metabolism
- DNA Methyltransferase 3A
- Female
- Gene Expression
- Humans
- Kaplan-Meier Estimate
- Leukemia, Myeloid, Acute/diagnosis
- Leukemia, Myeloid, Acute/metabolism
- Leukemia, Myeloid, Acute/mortality
- Male
- Middle Aged
- Multivariate Analysis
- Precursor Cell Lymphoblastic Leukemia-Lymphoma/diagnosis
- Precursor Cell Lymphoblastic Leukemia-Lymphoma/metabolism
- Precursor Cell Lymphoblastic Leukemia-Lymphoma/mortality
- Prognosis
- Proportional Hazards Models
- RNA, Long Noncoding/genetics
- RNA, Long Noncoding/metabolism
- Signal Transduction
- Tumor Cells, Cultured
- Young Adult
- DNA Methyltransferase 3B
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Affiliation(s)
- Yuan-Yuan Zhang
- Fujian Institute of Hematology, Fujian Provincial Key Laboratory on Hematology, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, P.R. China
| | - Si-Han Huang
- Fujian Institute of Hematology, Fujian Provincial Key Laboratory on Hematology, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, P.R. China
| | - Hua-Rong Zhou
- Fujian Institute of Hematology, Fujian Provincial Key Laboratory on Hematology, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, P.R. China
| | - Cong-Jie Chen
- Fujian Institute of Hematology, Fujian Provincial Key Laboratory on Hematology, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, P.R. China
| | - Li-Hong Tian
- Fujian Institute of Hematology, Fujian Provincial Key Laboratory on Hematology, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, P.R. China
| | - Jian-Zhen Shen
- Fujian Institute of Hematology, Fujian Provincial Key Laboratory on Hematology, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, P.R. China
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8
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Zhu WH, Zeng M, Wang J, Li CY, Tian LH, Yin JC, Liu YK. A multifunctional lanthanide metal–organic framework supported by Keggin type polyoxometalates. Dalton Trans 2016; 45:10141-5. [DOI: 10.1039/c6dt00428h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
An unusual multifunctional POM@MOF neodymium metal–organic framework with 1D nanotubular channels incorporating Keggin type [SiWV3WVI9O38]3− polyoxometalates was successfully synthesized.
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Affiliation(s)
- Wen-Hua Zhu
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules
- College of Chemistry and Chemical Engineering
- Hubei University
- Wuhan 430062
| | - Min Zeng
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules
- College of Chemistry and Chemical Engineering
- Hubei University
- Wuhan 430062
| | - Juan Wang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules
- College of Chemistry and Chemical Engineering
- Hubei University
- Wuhan 430062
| | - Chen-Yang Li
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules
- College of Chemistry and Chemical Engineering
- Hubei University
- Wuhan 430062
| | - Li-Hong Tian
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules
- College of Chemistry and Chemical Engineering
- Hubei University
- Wuhan 430062
| | - Jia-Cheng Yin
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules
- College of Chemistry and Chemical Engineering
- Hubei University
- Wuhan 430062
| | - Yu-Kun Liu
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules
- College of Chemistry and Chemical Engineering
- Hubei University
- Wuhan 430062
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Wang J, Li FB, Tian LH, Cheng SY. Synthesis, structure and electrochemical behavior of an organic-inorganic hybrid compound based on Dawson-type polyoxometalates. J COORD CHEM 2010. [DOI: 10.1080/00958970801891330] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Juan Wang
- a College of Chemistry and Chemical Engineering, Hubei University , Wuhan, P.R. China
- b School of Material and Metallurgy, Wuhan University of Science and Technology , Wuhan, P.R. China
| | - Feng-Biao Li
- a College of Chemistry and Chemical Engineering, Hubei University , Wuhan, P.R. China
| | - Li-Hong Tian
- a College of Chemistry and Chemical Engineering, Hubei University , Wuhan, P.R. China
| | - Shi-Yuan Cheng
- a College of Chemistry and Chemical Engineering, Hubei University , Wuhan, P.R. China
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10
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Zhang L, Tian LH, Zhao JF, Song Y, Zhang CJ, Guo Y. Identification of an apoplastic protein involved in the initial phase of salt stress response in rice root by two-dimensional electrophoresis. Plant Physiol 2009; 149:916-28. [PMID: 19036832 PMCID: PMC2633861 DOI: 10.1104/pp.108.131144] [Citation(s) in RCA: 126] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2008] [Accepted: 11/22/2008] [Indexed: 05/18/2023]
Abstract
The apoplast of plant cells, which carries out multiple functions in plant metabolism and signaling, is not only a barrier but also the linker between the environment and the protoplast. To investigate the role of apoplastic proteins in the salt stress response, 10-d-old rice (Oryza sativa) plants were treated with 200 mM NaCl for 1, 3, or 6 h, and the soluble apoplast proteins were extracted for differential analysis compared with untreated controls using two-dimensional electrophoresis. Ten protein spots that increased or decreased significantly in abundance were identified by mass spectrometry. These proteins included some well-known biotic and abiotic stress-related proteins. Among them, an apoplastic protein, with extracellular domain-like cysteine-rich motifs (DUF26), O. sativa root meander curling (OsRMC), has shown drastically increased abundance in response to salt stress during the initial phase. OsRMC RNA interference transgenic rice has been generated to assess the function of OsRMC in the salt stress response. The results show that knocking down the expression level of OsRMC in transgenic rice led to insensitive seed germination, enhanced growth inhibition, and improved salt stress tolerance to NaCl than in untransgenic plants. These results indicate that plant apoplastic proteins may have important roles in the plant salt stress response.
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Affiliation(s)
- Lei Zhang
- Institute of Molecular and Cell Biology, Hebei Normal University, Shijiazhuang 050016, China
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11
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Peterman TA, Tian LH, Warner L, Satterwhite CL, Metcalf CA, Malotte KC, Paul SM, Douglas JM. Condom use in the year following a sexually transmitted disease clinic visit. Int J STD AIDS 2009; 20:9-13. [DOI: 10.1258/ijsa.2008.008177] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Consistent condom use can prevent sexually transmitted infections (STIs), but few studies have measured how the prevalence of consistent use changes over time. We measured the prevalence and correlates of consistent condom use over the course of a year. We did a secondary analysis of data from an HIV prevention trial in three sexually transmitted disease clinics. We assessed condom use during four three-month intervals for subjects and across their partnerships using unconditional logistic regression. Condom use was also assessed for subjects during all three-month intervals combined. The 2125 subjects reported on 5364 three-month intervals including 7249 partnership intervals. Condoms were always used by 24.1% of subjects and 33.2% of partnerships during a three-month interval. Over the year, 82% used condoms at least once but only 5.1% always used condoms. Always use of condom was more likely for subjects who had sex only once (66.5%) compared with >30 times (6.4%); one-time partnerships (64.1%) compared with main partnerships (22.2%); and in new partnerships (44.0%) compared with partnerships that were not new (24.5%). Although consistent condom use may prevent STIs, condoms were rarely used consistently during the year of follow-up.
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Affiliation(s)
| | | | - L Warner
- Division of Reproductive Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | | | - C A Metcalf
- Human Sciences Research Council, Pretoria, South Africa
| | | | - S M Paul
- New Jersey Department of Health and Senior Services, Trenton, NJ, USA
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12
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Tian L, Liu S, Hu N, Jia H. Hydrothermal synthesis, crystal structure and electrochemical properties of a novel 3D Dawson-type polyoxometalate supramolecular network. Journal of Chemical Research 2008. [DOI: 10.3184/030823408x371218] [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] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A novel Dawson-type polyoxometalate supramolecular architecture of the formula [4,4′-H2bipy]2.5·[4,4′-Hbipy]·[P2W18O62]·6.25H2O (4,4′-bipy = 4,4′-bipyridine) has been hydrothermally synthesised and characterised by means of elemental analysis, IR, CV and X-ray single-crystal diffraction. X-ray crystallography indicates that the title compound consists of Dawson-type polyoxoaions [P2W18O62]6-, water molecules and 4,4′-bipy units. The polyoxoanion clusters together with 4,4′-bipy units and water molecules to construct the three-dimensional supramolecular network through hydrogen bonds. The crystal structure analyses reveal that water molecules and 4,4′-bipy units play the important role on the packing arrangements of crystals. Cyclic voltammetry shows that the title compound exhibits three chemically reversible steps
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Affiliation(s)
- LiHong Tian
- School of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, P.R. China
| | - ShiZhong Liu
- School of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, P.R. China
| | - NingHai Hu
- Changchun Institute of Applied Chemistry Chinese Academy of Sciences, Changchun 130022, P.R. China
| | - HengQing Jia
- Changchun Institute of Applied Chemistry Chinese Academy of Sciences, Changchun 130022, P.R. China
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Chen X, Tian LH, Xie HF, Shi W, Feng H, Li J, Chen FW. [Effects of CD147 on the production of matrix metalloproteinase-9 by fibroblasts and the invasion of melanoma cells]. Zhong Nan Da Xue Xue Bao Yi Xue Ban 2005; 30:249-52. [PMID: 16045006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
OBJECTIVE To investigate a possible role of CD147 in the production of matrix metalloproteinase-9 (MMP-9) by fibroblasts and the invasion of melanoma cells. METHODS We cocultured CD147-expression melanoma cells with fibroblasts and examined the MMP-9 expression of fibroblasts by zymography and the invasion of melanoma cells by transwell invasion assay. RESULTS MMP-9 expression was enhanced in conditioned media, while cocultured with melanoma cells in a dose-dependent manner, and CD147 antibody inhibited the production of MMP-9 in the fibroblasts. When fibroblasts were cultured at the bottom of the lower compartment of transwell invasion model, the number of melanoma cells that invaded significantly increased. Addition of anti-CD147 antibody to the upper compartment transwell invasion model resulted in the significant inhibition of the melanoma cell invasion in reconstituted basement membrane. CONCLUSION CD147 expressed in melanoma cells plays an important role in the melanoma cell invasion by stimulating the production of MMP-9 by fibroblasts.
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Affiliation(s)
- Xiang Chen
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha 410008. China.
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