1
|
Li L, Li Y, Yang J, Xie X, Chen H. The immune responses to different Uropathogens call individual interventions for bladder infection. Front Immunol 2022; 13:953354. [PMID: 36081496 PMCID: PMC9445553 DOI: 10.3389/fimmu.2022.953354] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Accepted: 08/05/2022] [Indexed: 11/13/2022] Open
Abstract
Urinary tract infection (UTI) caused by uropathogens is the most common infectious disease and significantly affects all aspects of the quality of life of the patients. However, uropathogens are increasingly becoming antibiotic-resistant, which threatens the only effective treatment option available-antibiotic, resulting in higher medical costs, prolonged hospital stays, and increased mortality. Currently, people are turning their attention to the immune responses, hoping to find effective immunotherapeutic interventions which can be alternatives to the overuse of antibiotic drugs. Bladder infections are caused by the main nine uropathogens and the bladder executes different immune responses depending on the type of uropathogens. It is essential to understand the immune responses to diverse uropathogens in bladder infection for guiding the design and development of immunotherapeutic interventions. This review firstly sorts out and comparatively analyzes the immune responses to the main nine uropathogens in bladder infection, and summarizes their similarities and differences. Based on these immune responses, we innovatively propose that different microbial bladder infections should adopt corresponding immunomodulatory interventions, and the same immunomodulatory intervention can also be applied to diverse microbial infections if they share the same effective therapeutic targets.
Collapse
Affiliation(s)
- Linlong Li
- The School of Basic Medical Sciences, Southwest Medical University, Luzhou, China
| | - Yangyang Li
- The School of Basic Medical Sciences, Southwest Medical University, Luzhou, China
| | - Jiali Yang
- The School of Basic Medical Sciences, Southwest Medical University, Luzhou, China
| | - Xiang Xie
- The School of Basic Medical Sciences, Southwest Medical University, Luzhou, China
- Public Center of Experimental Technology, Model Animal and Human Disease Research of Luzhou Key Laboratory, Southwest Medical University, Luzhou, China
- *Correspondence: Xiang Xie, ; Huan Chen,
| | - Huan Chen
- The School of Basic Medical Sciences, Southwest Medical University, Luzhou, China
- Nucleic Acid Medicine of Luzhou Key Laboratory, Southwest Medical University, Luzhou, China
- *Correspondence: Xiang Xie, ; Huan Chen,
| |
Collapse
|
2
|
Qasemi A, Rahimi F, Katouli M. Genetic diversity and virulence characteristics of biofilm-producing uropathogenic Escherichia coli. Int Microbiol 2021; 25:297-307. [PMID: 34705131 DOI: 10.1007/s10123-021-00221-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 10/18/2021] [Accepted: 10/20/2021] [Indexed: 10/20/2022]
Abstract
Uropathogenic E. coli (UPEC) strains exhibit different levels of biofilm formation that help adhesion of the bacteria to uroepithelial cells. We investigated the genetic diversity and virulence-associated genes (VAGs) of biofilm-producing UPEC. A collection of 107 biofilm-producing (BFP) UPEC strains isolated from patients with UTI in Iran were divided into three groups of strong, moderate, and weak BFPs after a quantitative microtiter plate assay, and the involvement of curli and cellulose in adhesion of the strains to T24 cell line was confirmed by the construction of csgD and yedQ mutants of two representative UPEC strains. BFP strains were tested for their genetic diversity, phylogenetic groups, and the presence of 15 VAGs. A significant decrease in adhesion of csgD and yedQ mutant strains confirmed the role of biofilm production in adhesion to uroepithelial cells. A high diversity was found among all three groups of strong (Di = 0.998), moderate (Di = 0.998), and weak (Di = 0.988) BFPs with majority of the strains belonging to phylogroups B2 (44.9%) and A (24.3%). Strong BFP strains carried significantly higher level papEF, hlyA, and iutA than other BFP groups. In contrast, the presence of fimH, focG, sfaS, set-1, and cvaC was more pronounced among weak BFP strains. There exists a high genetic diversity among the BFP strains with different VGA profiles. However, the high prevalence of phylogroup A among BFP strains suggests the fitness of commensal E. coli strains to cause UTI in this country.
Collapse
Affiliation(s)
- Ali Qasemi
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Hezarjarib St., Isfahan, Iran
| | - Fateh Rahimi
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Hezarjarib St., Isfahan, Iran.
| | - Mohammad Katouli
- Genecology Research Center, Maroochydore, QLD, Australia.,School of Science, Technology and Education, University of the Sunshine Coast, Maroochydore, QLD, Australia
| |
Collapse
|
3
|
Fan B, Shi S, Shen X, Yang X, Liu N, Wu G, Guo X, Huang N. Effect of HMGN2 on proliferation and apoptosis of MCF-7 breast cancer cells. Oncol Lett 2018; 17:1160-1166. [PMID: 30655878 PMCID: PMC6312954 DOI: 10.3892/ol.2018.9668] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Accepted: 10/16/2018] [Indexed: 11/28/2022] Open
Abstract
We investigated the effect of high mobility group protein N2 (HMGN2) on the proliferation and apoptosis of the human MCF-7 breast cancer cell line, and its effect on tumor growth in a subcutaneous heterotopic transplantation tumor model of breast cancer. The cell viability assay was used to verify the effect of the recombinant human HMGN2 on MCF-7 cell proliferation. The Transwell chamber assay was used to verify the effect of HMGN2 on MCF-7 cell migration. Flow cytometry and Hoechst staining were used to detect the effect of HMGN2 on MCF-7 cell apoptosis. MCF-7 was injected to establish a subcutaneous heterotopic transplantation tumor model of breast cancer in nude mice. The size, weight and volume of tumor in each group were compared after the administration of different concentrations of HMGN2 solution around the tumor tissue at day 1, 3, 5 and 7. The tumor tissue was removed and cut into sections, and the apoptotic cells in tumors of nude mice were detected by a TUNEL kit. The CCK-8 assay showed that HMGN2 at different concentrations inhibited the proliferation of the MCF-7 breast cancer cells, and the proliferation of MCF-7 cells were significantly inhibited when the concentration of HMGN2 reached 3 µg/ml (P<0.01). The Transwell chamber assay showed that 3 µg/ml of HMGN2 significantly decreased the migration capacity of MCF-7 cells (P<0.01). Flow cytometry and Hoechst staining showed that 3 µg/ml of HMGN2 significantly increased apoptosis of MCF-7 cells (P<0.01). After the nude mouse model of breast cancer was established, HMGN2 at different concentrations was injected around the tumor tissue at day 1, 3, 5 and 7. We demonstrated that the growth of breast cancer was significantly inhibited when the concentration of HMGN2 reached 15 µg/ml. TUNEL staining showed that the number of apoptotic cells in the 15 µg/ml dose group was significantly higher than that in the control group (P<0.01). Therefore, in vitro and in vivo experiments proved that recombinant human HMGN2 could significantly inhibit the proliferation and migration of breast cancer cells, which increased the apoptosis of breast cancer cells and exerted anti-breast cancer effects, which enriched our understanding of the biological roles of HMGN2.
Collapse
Affiliation(s)
- Bo Fan
- Department of Pathophysiology, Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China.,Department of Pathophysiology, Xuzhou Medical University, Xuzhou, Jiangsu 221000, P.R. China
| | - Sifeng Shi
- Department of Orthopedics, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu 221000, P.R. China
| | - Xiaofei Shen
- Department of Pathophysiology, Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Xiaolong Yang
- Department of Pathophysiology, Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Na Liu
- Department of Pathophysiology, Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Guixia Wu
- Department of Physiology, Xinjiang Medical University, Urumqi, Xinjiang Uygur Autonomous Region 830011, P.R. China
| | - Xiaojuan Guo
- Department of Pathophysiology, Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Ning Huang
- Department of Pathophysiology, Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| |
Collapse
|
4
|
Li H, Shen XF, Zhou XE, Shi YE, Deng LX, Ma Y, Wang XY, Li JY, Huang N. Antibacterial mechanism of high-mobility group nucleosomal-binding domain 2 on the Gram-negative bacteria Escherichia coli. J Zhejiang Univ Sci B 2017; 18:410-420. [PMID: 28471113 DOI: 10.1631/jzus.b1600139] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE To investigate the antibacterial mechanism of high-mobility group nucleosomal-binding domain 2 (HMGN2) on Escherichia coli K12, focusing on the antibacterial and antibiofilm formation effects. Its chemotactic activity on human neutrophils was also investigated. METHODS Human tissue-derived HMGN2 (tHMGN2) was extracted from fresh uterus fiber cystadenoma and purified by HP1100 reversed-phase high-performance liquid chromatography (RP-HPLC). Recombinant human HMGN2 (rHMGN2) was generated in E. coli DE3 carrying PET-32a-c(+)-HMGN2. Antibacterial activity of HMGN2 was determined using an agarose diffusion assay and minimum inhibitory concentration (MIC) of HMGN2 was determined by the microdilution broth method. Bacterial membrane permeability assay and DNA binding assay were performed. The antibiofilm effect of HMGN2 was investigated using a crystal violet assay and electron microscopy scanning. The activating effect and chemotactic activity of HMGN2 on neutrophils were determined using a nitroblue tetrazolium (NBT) reduction assay and Transwell chamber cell migration assay, respectively. RESULTS HMGN2 showed a relatively high potency against Gram-negative bacteria E. coli and the MIC of HMGN2 was 16.25 μg/ml. Elevated bacterial membrane permeability was observed in HMGN2-treated E. coli K12. HMGN2 could also bind the bacterial plasmid and genomic DNA in a dose-dependent manner. The antibiofilm effect of HMGN2 on E. coli K12 was confirmed by crystal violet staining and scanning electron microscopy. However, the activating effects and chemotactic effects of HMGN2 on human neutrophils were not observed. CONCLUSIONS As an antimicrobial peptide (AMP), HMGN2 possessed a good capacity for antibacterial and antibiofilm activities on E. coli K12. This capacity might be associated with disruption of the bacterial membrane and combination of DNA, which might affect the growth and viability of E. coli.
Collapse
Affiliation(s)
- Heng Li
- Research Unit of Infection and Immunity, Sichuan University, Chengdu 610041, China.,Department of Pathophysiology, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Xiao-Fei Shen
- Research Unit of Infection and Immunity, Sichuan University, Chengdu 610041, China.,Department of Pathophysiology, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Xin-E Zhou
- Department of Pathophysiology, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Yan-E Shi
- Department of Pathophysiology, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Lu-Xia Deng
- Department of Pathophysiology, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Yi Ma
- Department of Pathophysiology, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Xiao-Ying Wang
- Department of Pathophysiology, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Jing-Yu Li
- Department of Pathophysiology, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Ning Huang
- Research Unit of Infection and Immunity, Sichuan University, Chengdu 610041, China.,Department of Pathophysiology, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China.,Sichuan University "985 Project Science and Technology Innovation Platform for Novel Drug Development", Sichuan University, Chengdu 610041, China
| |
Collapse
|
5
|
Wang X, Li J, Chen S, Shen X, Yang X, Teng Y, Deng L, Wang Y, Chen J, Wang X, Huang N. Knockdown of HMGN2 increases the internalization of Klebsiella pneumoniae by respiratory epithelial cells through the regulation of α5β1 integrin expression. Int J Mol Med 2016; 38:737-46. [PMID: 27460641 PMCID: PMC4990306 DOI: 10.3892/ijmm.2016.2690] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2015] [Accepted: 07/11/2016] [Indexed: 01/13/2023] Open
Abstract
Integrin receptors, a large family of adhesion receptors, are involved in the attachment of Klebsiella pneumoniae to respiratory epithelial cells, and subsequently cause the internalization of K. pneumoniae by host cells. Although a number of molecules have been reported to regulate the expression and activity of integrin receptors in respiratory epithelial cells, the specific underlying molecular mechanisms remain largely unknown. High mobility group nucleosomal binding domain 2 (HMGN2), a non-histone nuclear protein, is present in eukaryotic cells as a ubiquitous nuclear protein. Our previous studies have demonstrated that HMGN2 affects chromatin function and modulates the expression of antibacterial peptide in A549 cells exposed to lipopolysaccharide, which indicates the critical role of HMGN2 in innate immune responses. In addition, our cDNA microarray analysis suggested that HMGN2 knockdown induced the enhanced expression of α5β1 integrin in A549 cells. Therefore, we hypothesized that intercellular HMGN2 may mediate the internalization of K. pneumoniae by altering the expression of α5β1 integrin. Using the A549 cell line, we demonstrated that HMGN2 knockdown induced the increased expression of α5β1 integrin on cell membranes, which resulted in a significant increase in K. pneumoniae internalization. Further results revealed that HMGN2 silencing induced the expression of talin and the activation of α5β1 integrin, which led to actin polymerization following the phosphorylation of FAK and Src. This study suggests a possible therapeutic application for bacterial internalization by targeting HMGN2 in order to treat K. pneumoniae infection.
Collapse
Affiliation(s)
- Xinyuan Wang
- Department of Pathophysiology, Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Jingyu Li
- Department of Pathophysiology, Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Shanze Chen
- Department of Pathophysiology, Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Xiaofei Shen
- Department of Pathophysiology, Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Xiaolong Yang
- Department of Pathophysiology, Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Yan Teng
- Department of Pathophysiology, Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Luxia Deng
- Department of Pathophysiology, Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Yi Wang
- Department of Pathophysiology, Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Junli Chen
- Department of Pathophysiology, Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Xiaoying Wang
- Department of Pathophysiology, Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Ning Huang
- Department of Pathophysiology, Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| |
Collapse
|
6
|
Yang X, Sha K, Xu G, Tian H, Wang X, Chen S, Wang Y, Li J, Chen J, Huang N. Subinhibitory Concentrations of Allicin Decrease Uropathogenic Escherichia coli (UPEC) Biofilm Formation, Adhesion Ability, and Swimming Motility. Int J Mol Sci 2016; 17:ijms17070979. [PMID: 27367677 PMCID: PMC4964365 DOI: 10.3390/ijms17070979] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2016] [Revised: 06/08/2016] [Accepted: 06/15/2016] [Indexed: 11/16/2022] Open
Abstract
Uropathogenic Escherichia coli (UPEC) biofilm formation enables the organism to avoid the host immune system, resist antibiotics, and provide a reservoir for persistent infection. Once the biofilm is established, eradication of the infection becomes difficult. Therefore, strategies against UPEC biofilm are urgently required. In this study, we investigated the effect of allicin, isolated from garlic essential oil, on UPEC CFT073 and J96 biofilm formation and dispersal, along with its effect on UPEC adhesion ability and swimming motility. Sub-inhibitory concentrations (sub-MICs) of allicin decreased UPEC biofilm formation and affected its architecture. Allicin was also capable of dispersing biofilm. Furthermore, allicin decreased the bacterial adhesion ability and swimming motility, which are important for biofilm formation. Real-time quantitative polymerase chain reaction (RT-qPCR) revealed that allicin decreased the expression of UPEC type 1 fimbriae adhesin gene fimH. Docking studies suggested that allicin was located within the binding pocket of heptyl α-d-mannopyrannoside in FimH and formed hydrogen bonds with Phe1 and Asn135. In addition, allicin decreased the expression of the two-component regulatory systems (TCSs) cognate response regulator gene uvrY and increased the expression of the RNA binding global regulatory protein gene csrA of UPEC CFT073, which is associated with UPEC biofilm. The findings suggest that sub-MICs of allicin are capable of affecting UPEC biofilm formation and dispersal, and decreasing UPEC adhesion ability and swimming motility.
Collapse
Affiliation(s)
- Xiaolong Yang
- Research Unit of Infection and Immunity, Department of Pathophysiology, West China School of Preclinical & Forensic Medicine, Sichuan University, Chengdu 610000, Sichuan, China.
| | - Kaihui Sha
- Research Unit of Infection and Immunity, Department of Pathophysiology, West China School of Preclinical & Forensic Medicine, Sichuan University, Chengdu 610000, Sichuan, China.
| | - Guangya Xu
- Research Unit of Infection and Immunity, Department of Pathophysiology, West China School of Preclinical & Forensic Medicine, Sichuan University, Chengdu 610000, Sichuan, China.
| | - Hanwen Tian
- Research Unit of Infection and Immunity, Department of Pathophysiology, West China School of Preclinical & Forensic Medicine, Sichuan University, Chengdu 610000, Sichuan, China.
| | - Xiaoying Wang
- Research Unit of Infection and Immunity, Department of Pathophysiology, West China School of Preclinical & Forensic Medicine, Sichuan University, Chengdu 610000, Sichuan, China.
| | - Shanze Chen
- Research Unit of Infection and Immunity, Department of Pathophysiology, West China School of Preclinical & Forensic Medicine, Sichuan University, Chengdu 610000, Sichuan, China.
| | - Yi Wang
- Research Unit of Infection and Immunity, Department of Pathophysiology, West China School of Preclinical & Forensic Medicine, Sichuan University, Chengdu 610000, Sichuan, China.
| | - Jingyu Li
- Research Unit of Infection and Immunity, Department of Pathophysiology, West China School of Preclinical & Forensic Medicine, Sichuan University, Chengdu 610000, Sichuan, China.
| | - Junli Chen
- Research Unit of Infection and Immunity, Department of Pathophysiology, West China School of Preclinical & Forensic Medicine, Sichuan University, Chengdu 610000, Sichuan, China.
| | - Ning Huang
- Research Unit of Infection and Immunity, Department of Pathophysiology, West China School of Preclinical & Forensic Medicine, Sichuan University, Chengdu 610000, Sichuan, China.
| |
Collapse
|
7
|
Zheng S, Ren L, Li H, Shen X, Yang X, Li N, Wang X, Guo X, Wang X, Huang N. High-mobility group nucleosome-binding domain 2 protein inhibits the invasion of Klebsiella pneumoniae into mouse lungs in vivo. Mol Med Rep 2015; 12:1279-85. [PMID: 25760831 DOI: 10.3892/mmr.2015.3464] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Accepted: 01/29/2015] [Indexed: 11/05/2022] Open
Abstract
Since bacterial invasion into host cells is a critical step in the infection process and the predominance of multiple-antibiotic-resistant Klebsiella (K.) pneumoniae strains, using molecular agents to interfere with K. pneumoniae invasion is an attractive approach for the prevention of infection and suppress the immune inflammatory response. In previous studies by our group, high-mobility group nucleosome-binding domain 2 (HMGN2) protein was shown to exhibit anti-bacterial activity in vitro. The objective of the present study was to investigate the effects of HMGN2 protein on the invasion of K. pneumoniae 03183 in vivo. The results showed that pre-treatment with 128 µg/ml HMGN2 significantly reduced K. pneumoniae 03183 invasion into mouse lungs and increased the mRNA expression of CXCL1 and LCN2 within 2 h. Immunohistochemical staining showed that F-actin expression was significantly decreased, and fluorescence microscopy and western blot analysis further demonstrated that HMGN2 significantly blocked K. pneumoniae 03183-induced actin polymerization. These changes implied that HMGN2 may provide protection against K. pneumoniae 03183 infection in vivo.
Collapse
Affiliation(s)
- Shuang Zheng
- Department of Pathophysiology, West China School of Preclinical Sciences and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Laibin Ren
- Department of Pathophysiology, West China School of Preclinical Sciences and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Heng Li
- Department of Pathophysiology, West China School of Preclinical Sciences and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Xiaofei Shen
- Department of Pathophysiology, West China School of Preclinical Sciences and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Xiaolong Yang
- Department of Pathophysiology, West China School of Preclinical Sciences and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Na Li
- Department of Pathophysiology, West China School of Preclinical Sciences and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Xinyuan Wang
- Department of Pathophysiology, West China School of Preclinical Sciences and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Xiaojuan Guo
- Department of Pathophysiology, West China School of Preclinical Sciences and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Xiaoying Wang
- Department of Pathophysiology, West China School of Preclinical Sciences and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Ning Huang
- Department of Pathophysiology, West China School of Preclinical Sciences and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| |
Collapse
|
8
|
Morande PE, Borge M, Abreu C, Galletti J, Zanetti SR, Nannini P, Bezares RF, Pantano S, Dighiero G, Oppezzo P, Gamberale R, Giordano M. Surface localization of high-mobility group nucleosome-binding protein 2 on leukemic B cells from patients with chronic lymphocytic leukemia is related to secondary autoimmune hemolytic anemia. Leuk Lymphoma 2015; 56:1115-22. [DOI: 10.3109/10428194.2014.957205] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
9
|
Shen XF, Ren LB, Teng Y, Zheng S, Yang XL, Guo XJ, Wang XY, Sha KH, Li N, Xu GY, Tian HW, Wang XY, Liu XK, Li J, Huang N. Luteolin decreases the attachment, invasion and cytotoxicity of UPEC in bladder epithelial cells and inhibits UPEC biofilm formation. Food Chem Toxicol 2014; 72:204-11. [PMID: 25051393 DOI: 10.1016/j.fct.2014.07.019] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2014] [Revised: 07/03/2014] [Accepted: 07/09/2014] [Indexed: 01/24/2023]
Abstract
Urinary tract infection (UTI), primarily caused by uropathogenic Escherichia coli (UPEC), is one of the most common infectious diseases worldwide. Emerging antibiotic resistance requires novel treatment strategies. Luteolin, a dietary polyphenolic flavonoid, has been confirmed as a potential antimicrobial agent. Here, we evaluated the sub-MICs of luteolin for potential properties to modulate the UPEC infection. We found that luteolin significantly decreased the attachment and invasion of UPEC J96 or CFT073 in human bladder epithelial cell lines T24. Meanwhile, obvious decreased expression of type 1 fimbriae adhesin fimH gene, lower bacterial surface hydrophobicity and swimming motility, were observed in luteolin-pretreated UPEC. Furthermore, luteolin could attenuate UPEC-induced cytotoxicity in T24 cells, which manifested as decreased activity of lactate dehydrogenase (LDH). Simultaneously, the inhibition of luteolin on UPEC-induced cytotoxicity was confirmed by ethidium bromide/acridine orange staining. Finally, the luteolin-pretreated UPEC showed a lower ability of biofilm formation. Collectively, these results indicated that luteolin decreased the attachment and invasion of UPEC in bladder epithelial cells, attenuated UPEC-induced cytotoxicity and biofilm formation via down-regulating the expression of adhesin fimH gene, reducing the bacterial surface hydrophobicity and motility.
Collapse
Affiliation(s)
- Xiao-fei Shen
- Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China; Department of Pathophysiology, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Lai-bin Ren
- Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China; Department of Pathophysiology, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Yan Teng
- Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China; Department of Pathophysiology, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Shuang Zheng
- Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China; Department of Pathophysiology, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Xiao-long Yang
- Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China; Department of Pathophysiology, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Xiao-juan Guo
- Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China; Department of Pathophysiology, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Xin-yuan Wang
- Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China; Department of Pathophysiology, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Kai-hui Sha
- Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China; Department of Pathophysiology, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Na Li
- Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China; Department of Pathophysiology, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Guang-ya Xu
- Department of Pathophysiology, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Han-wen Tian
- Department of Pathophysiology, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China; Department of Pharmacology, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Xiao-ying Wang
- Department of Pathophysiology, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Xiao-kang Liu
- Department of Pharmacology, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Jingyu Li
- Department of Pathophysiology, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China.
| | - Ning Huang
- Research Unit of Infection and Immunity, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China; Department of Pathophysiology, West China College of Basic and Forensic Medicine, Sichuan University, Chengdu 610041, China.
| |
Collapse
|