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Zhao H, Ma H, Song C, Fan S, Fan H, Zhou W, Cao J. Prevalence and molecular characterization of multi-resistant Escherichia coli isolates from clinical bovine mastitis in China. Anim Biotechnol 2024; 35:2322541. [PMID: 38478400 DOI: 10.1080/10495398.2024.2322541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Different antibiotics are used to treat mastitis in dairy cows that is caused by Escherichia coli (E. coli). Antimicrobial resistance in food-producing animals in China has been monitored since 2000. Surveillance data have shown that the prevalence of multiresistant E. coli in animals has increased significantly. This study aimed to investigate the occurrence and molecular characteristics of resistance determinants in E. coli strains (n = 105) obtained from lactating cows with clinical bovine mastitis (CBM) in China. A total of 220 cows with clinical mastitis, which has swollen mammary udder with reduced and red or gangrenous milk, were selected from 5000 cows. The results showed 94.3% of the isolates were recognized as multidrug resistant. The isolates (30.5%) were positive for the class I integrase gene along with seven gene cassettes that were accountable for resistance to trimethoprim resistance (dfrA17, dfr2d and dfrA1), aminoglycosides resistance (aadA1 and aadA5) and chloramphenicol resistance (catB3 and catB2), respectively. The blaTEM gene was present in all the isolates, and these carried the blaCTX gene. A double mutation in gyrA (i.e., Ser83Leu and Asp87Asn) was observed in all fluoroquinolone-resistant isolates. In total, nine fluoroquinolone-resistant E. coli isolates were identified with five different types of mutations in parC. In four (44.4%) isolates, Ser458Ala was present in parE, and in all nine (9/9) fluoroquinolone-resistant isolates, Pro385Ala was present in gyrB. Meanwhile, fluoroquinolone was observed as highly resistant, especially in isolates with gyrA and parC mutations. In summary, the findings of this research recognize the fluoroquinolone resistance mechanism and disclose integron prevalence and ESBLs in E. coli isolates from lactating cattle with CBM.
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Affiliation(s)
- Hongxia Zhao
- Department of Pharmacology and Toxicology, College of Veterinary Medicine, Inner Mongolia Agricultural University, Huhhot, PR China
| | - Hailan Ma
- Department of Pharmacology and Toxicology, College of Veterinary Medicine, Inner Mongolia Agricultural University, Huhhot, PR China
| | - Chen Song
- Department of Pharmacology and Toxicology, College of Veterinary Medicine, Inner Mongolia Agricultural University, Huhhot, PR China
| | - Shuting Fan
- Middle East College of Beijing International Studies University, Beijing, PR China
| | - Hongliang Fan
- Inner Mongolia Yili Industrial Group Co. Ltd., Huhhot, PR China
| | - Weiguang Zhou
- Department of Pharmacology and Toxicology, College of Veterinary Medicine, Inner Mongolia Agricultural University, Huhhot, PR China
| | - Jinshan Cao
- Department of Pharmacology and Toxicology, College of Veterinary Medicine, Inner Mongolia Agricultural University, Huhhot, PR China
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Zong B, Xiao Y, Ren M, Wang P, Fu S, Qiu Y. Baicalin Weakens the Porcine ExPEC-Induced Inflammatory Response in 3D4/21 Cells by Inhibiting the Expression of NF- κB/MAPK Signaling Pathways and Reducing NLRP3 Inflammasome Activation. Microorganisms 2023; 11:2126. [PMID: 37630686 PMCID: PMC10458126 DOI: 10.3390/microorganisms11082126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 08/15/2023] [Accepted: 08/18/2023] [Indexed: 08/27/2023] Open
Abstract
Porcine extraintestinal pathogenic Escherichia coli (ExPEC) is a leading cause of death in pigs and has led to considerable economic losses for the pig industry. Porcine ExPEC infections often cause systemic inflammatory responses in pigs, characterized by meningitis, arthritis, pneumonia, and septicemia. Baicalin has been reported to possess potent anti-inflammatory activity, but its function in porcine ExPEC remains unknown. The aim of this study was to explore the protective effect and mechanism of baicalin against the porcine ExPEC-induced inflammatory responses in 3D4/21 cells. After treatment with baicalin, the effects on cell damage, the level of pro-inflammatory cytokines, the expression of nuclear factor-κB (NF-κB)/mitogen-activated protein kinase (MAPK) signaling pathways, and the activation of NOD-like receptor protein 3 (NLRP3) inflammasomes were examined. Our results show that baicalin significantly reduced the damage to 3D4/21 cells infected with porcine ExPEC PCN033. Further study showed that baicalin significantly reduced the transcription and expression of pro-inflammatory cytokines such as interleukin-1β (IL-1β), interleukin-6 (IL-6), and interleukin-8 (IL-8). Furthermore, baicalin inhibited the phosphorylation of proteins such as P65, nuclear factor κB inhibitor α (IκBα), extracellular regulated kinase (ERK), c-Jun N-terminal kinase (JNK), and P38 and reduced the expression levels of proteins such as NLRP3, apoptosis-associated speck-like protein containing a CARD (ASC), and caspase-1. These results reveal that baicalin reduced the damage to 3D4/21 cells by inhibiting the expression of NF-κB/MAPK signaling pathways and blocking NLRP3 inflammasome activation in 3D4/21 cells infected with porcine ExPEC. Taken together, these results suggest that baicalin may have potential as a medicine for the treatment of porcine ExPEC-infected pigs by regulating inflammatory responses. This study provides a novel potential pharmaco-therapeutic approach to preventing porcine ExPEC infection.
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Affiliation(s)
- Bingbing Zong
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, China
- Engineering Research Center of Feed Protein Resources on Agricultural By-Products, Ministry of Education, Wuhan Polytechnic University, Wuhan 400023, China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan 400023, China
| | - Yong Xiao
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan 400023, China
| | - Mingxing Ren
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan 400023, China
| | - Peiyi Wang
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan 400023, China
| | - Shulin Fu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan 400023, China
| | - Yinsheng Qiu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, China
- Engineering Research Center of Feed Protein Resources on Agricultural By-Products, Ministry of Education, Wuhan Polytechnic University, Wuhan 400023, China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan 400023, China
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Wang Y, Liu Z, Shen P, Zhao C, Liu B, Shu C, Hu X, Fu Y. Kynurenic acid ameliorates lipopolysaccharide-induced endometritis by regulating the GRP35/NF-κB signaling pathway. Toxicol Appl Pharmacol 2022; 438:115907. [DOI: 10.1016/j.taap.2022.115907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 01/25/2022] [Accepted: 01/29/2022] [Indexed: 10/19/2022]
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Umar T, Ma X, Yin B, Umer S, Zahoor A, Akhtar M, Umar Z, Shaukat A, Deng G. miR-424-5p overexpression inhibits LPS-stimulated inflammatory response in bovine endometrial epithelial cells by targeting IRAK2. J Reprod Immunol 2021; 150:103471. [PMID: 35032930 DOI: 10.1016/j.jri.2021.103471] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 12/23/2021] [Accepted: 12/27/2021] [Indexed: 11/26/2022]
Abstract
Endometritis is inflammation of endometrium due to various factors and is a common cause of infertility. Several remedies used for endometritis like antibiotics, hormones, and herbs. Studies confirm that microRNAs play a significant role in various inflammatory diseases. However, the role of miR-424-5p in endometritis is not clear. In our study, histopathology, real-time quantitative polymerase chain reaction, Western blot analysis, immunofluorescence, ELISA, and dual-luciferase reporter assay were used to elucidate the effect of miR-424-5p in lipopolysaccharide (LPS)-primed inflammatory response in bovine endometrial epithelial cells (BEECs) and clarify the potential mechanism. Our results revealed that miR-424-5p mimics noticeably decrease the production of proinflammatory cytokines (IL-1β, IL-6, and TNF-α), while miR-424-5p inhibitors have inverse effects in BEECs. Moreover, overexpression of miR-424-5p on BEECs cells also suppressed NF-κB p65 activation. Afterwards, we verified that miR-424-5p inhibited Interleukin 1 Receptor Associated Kinase 2 (IRAK2) expression by binding to the 3'-UTR of IRAK2 mRNA. Further, co-transfection of miR-424-5p inhibitors and siRNA-IRAK2 revealed that negative regulation of miR-424-5p on LPS-induced inflammatory response in BEECs was mediated by IRAK2.Mutually, miR-424-5p pharmacologic stabilization represents an entirely unique medical aid for cow endometritis and other inflammation-related diseases.
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Affiliation(s)
- Talha Umar
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Xiaofei Ma
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Baoyi Yin
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Saqib Umer
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, 100193, PR China; Department of Theriogenology, Faculty of Veterinary Science, University of Agriculture, Faisalabad, 38000 Punjab, Pakistan
| | - Arshad Zahoor
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Muhammad Akhtar
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Zaima Umar
- Department of Anatomy and Histology, Faculty of Veterinary Science, University of Agriculture, Faisalabad, 38000 Punjab, Pakistan
| | - Aftab Shaukat
- National Center for International Research on Animal Genetics, Breeding and Reproduction (NCIRAGBR), Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Ganzhen Deng
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, PR China.
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Ramos GLDPA, Nascimento JDS. Antibiotic resistance profile and detection of degradative enzymes by Enterobacteriaceae isolated from raw goat milk. Germs 2021; 11:211-220. [PMID: 34422693 DOI: 10.18683/germs.2021.1258] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 05/20/2021] [Accepted: 05/30/2021] [Indexed: 11/08/2022]
Abstract
Introduction Enterobacteriaceae are often reported as a typical bacterial population in raw milk from any mammalian origin. The frequent concern with bacteria, especially those related to this group of microorganisms, is their increasing resistance to antibiotics and the emergence of enzymes that degrade them. This study aimed to characterize isolates of Enterobacteriaceae from raw goat milk to expose associated safety problems and possible technological challenges. Methods Isolates from 21 raw goat milk samples purchased in the State of Rio de Janeiro, Brazil, were identified by mass spectrometry, after isolation on Violet Red Bile Glucose agar. The isolates were subjected to evaluation of proteolytic, lipolytic, hemolytic, and biofilm producing activities. Furthermore, resistance profiles and production capacity of enzymes that degrade antimicrobials were evaluated. Results Almost half of the 59 isolates (48%) belonged to the Enterobacter genus, with a significant prevalence of the Serratia (20%) and Klebsiella (11%) genera. The majority showed biofilm-producing activity (90%), while the activity of degradative enzymes was observed in approximately 20%. Few isolates were found with a profile of resistance to antimicrobials, with only one isolate of Klebsiella variicola being classified as multidrug-resistant. However, chromogenic culture media showed high production of extended-spectrum beta-lactamases and carbapenemases (54% and 46%, respectively), as a presumptive identification. Conclusions A considerable degree of virulence was observed in the Enterobacteriaceae isolates, as well as the potential for undesirable technological damage. The characterization and identification of the isolates contributes to the improvement of the risk monitoring process of goat's milk.
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Affiliation(s)
- Gustavo Luis de Paiva Anciens Ramos
- MD, Departamento de Bromatologia, Faculdade de Farmácia, Universidade Federal Fluminense (UFF), Rua Doutor Mário Viana, 523 - Santa Rosa - Niterói, CEP 24241-002, Brazil
| | - Janaína Dos Santos Nascimento
- PhD, Departamento de Microbiologia, Instituto Federal de Educação, Ciência e Tecnologia do Rio de Janeiro (IFRJ), Rua Senador Furtado, 121 - Laboratório 412 - Maracanã, Rio de Janeiro, RJ, CEP 20270-021, Brazil
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Yin B, Umar T, Ma X, Chen Y, Chen N, Wu Z, Deng G. MiR-193a-3p targets LGR4 to promote the inflammatory response in endometritis. Int Immunopharmacol 2021; 98:107718. [PMID: 34139630 DOI: 10.1016/j.intimp.2021.107718] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 04/17/2021] [Accepted: 04/21/2021] [Indexed: 01/02/2023]
Abstract
Solving the reproductive barriers of dairy cows has become one of the most critical factors determining the dairy industry's development. Clinically, inflammation disease like endometritis is the most crucial cause in reducing dairy production's financial viability. MiR-193 family can induce cell apoptosis and differentiation has been reported in various diseases. LGR4 plays a vital role in reproductive system development and immune system regulation, and it is closely related to animal reproductive function and cytokine regulation. In this study, we observed a negative relationship between miR-193a-3p and LGR4 expression level in both inflammatory tissues and cells. The expression level of miR-193a-3p and LGR4 in bovine endometrial epithelial cells (BENDs) is regulated by lipopolysaccharide (LPS) stimulation time and dose-dependent. Subsequently, miR-193a-3p mimics and inhibitors were used to explore its functions in the inflammation response process, finding that overexpression of miR-193a-3p markedly increases the expression level of pro-inflammatory cytokines induced by LPS, such as IL-1β, IL-6 and TNF-α, while the group in which transfected inhibitor is on the contrary. Of note, immunofluorescence and western blot results showed that miR-193a-3p enhanced LPS-induced NF-κB p65 phosphorylation through targeting LGR4, whereas inhibiting miR-193a-3p could suppress the activation of NF-κB pathway significantly. In conclusion, our study firstly reported the mechanism by which miR-193a-3p targets LGR4 to elevate the inflammatory response in bovine endometrium injury, thereby implying that knockdown miR-193a-3p may lay the theoretical and practical basis for drug development of alleviating endometritis in dairy cows.
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Affiliation(s)
- Baoyi Yin
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Talha Umar
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Xiaofei Ma
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Yu Chen
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Nuoer Chen
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Zhimin Wu
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Ganzhen Deng
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, PR China.
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MicroRNA: Could It Play a Role in Bovine Endometritis? Inflammation 2021; 44:1683-1695. [PMID: 33907916 DOI: 10.1007/s10753-021-01458-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 03/15/2021] [Accepted: 03/29/2021] [Indexed: 02/06/2023]
Abstract
Endometritis in dairy cows is a major economic problem worldwide; without advances in lifestyle management and drug treatment, it causes high morbidity and death. Micro ribonucleic acid (miRNAs) these days is seen as an important part of gene control networks. It is a class of small nucleotides 20-25, single-stranded RNA molecules. In endometritis, the inflammatory response caused by the gram-negative bacteria Escherichia coli (E. coli) alters the expression of miRNA which can regulate the innate immune system. This manuscript reviews (1) the interaction of miRNAs with the signaling of NF-κB and dysregulation of miRNAs and NF-κB activity in endometritis and (2) the activity of miR-let-7c, miR-148a, and miR-488 in NF-κB activation and their effect on endometritis. Cows with reduced immunity are more vulnerable to transition diseases, such as endometritis. During post-partum, cows undergo stress, metabolic disorders, hormonal imbalance, negative energy balance, and changes in diet. One of the many categories of regulatory molecules, which explain its natural function and pathological impact on NF-κB dysregulation, is important to inform the complexity of the immune system and to develop treatments for endometritis. It shows that miRNAs could have multiple applications in veterinary medicine. Nevertheless, a comprehensive study of is essential which should be aimed at exploring the role of microRNA at physiological level and its effect due to dysfunction and dysregulation.
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Yan C, Lv H, Peng Z, Yang D, Shen P, Yu J, Tong C, Wang X. Analysis of miRNA expression changes in bovine endometrial stromal cells treated with lipopolysaccharide. Theriogenology 2021; 167:85-93. [PMID: 33784501 DOI: 10.1016/j.theriogenology.2021.03.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 03/12/2021] [Accepted: 03/16/2021] [Indexed: 12/20/2022]
Abstract
After parturition, bovine uterine stromal cells are often exposed to complex bacterial and viral stimuli owing to epithelial cell rupture, resulting in an inflammatory response. In this study, we used an in vitro model to study the response of bovine endometrial stromal cells to inflammatory mediators and the associated regulated microRNAs in response to lipopolysaccharide. Lipopolysaccharide (LPS) is a bacterial wall component in gram-negative bacteria that causes inflammation upon immune recognition, which is used to create in vitro inflammation models. Thus, we used high-throughput RNA sequencing to identify miRNAs that may have an anti-inflammatory role in the LPS-induced inflammatory response. Two groups of bovine uterine cells were treated with phosphate buffer saline (PBS) and LPS, respectively. Compared with the control (PBS) group, the LPS-treated group had 219 differentially expressed miRNAs, of which 113 were upregulated, and 106 were downregulated. Gene ontology enrichment analysis revealed that the target genes of differentially expressed miRNAs were significantly enriched in several activities, such as transferase activity, small molecule binding, and protein binding. Kyoto Encyclopedia of Genes and Genomes pathway analysis indicated that the target genes of differential miRNAs were significantly enriched in fluid shear stress and atherosclerosis, MAPK signaling pathway, TNF signaling pathway. By analyzing differentially expressed miRNAs, we found that miR-200c, miR-1247-3p, and let-7b are directly related to the inflammatory response. For instance, miR-200c target genes (MAP3K1, MAP4K3, MAPKAPK5, MAP3K8, MAP3K5) and let-7b target genes (CASP3, IL13, MAPK8, CXCL10) were significantly enriched in the MAPK and IL-17 signaling pathways, respectively. In summary, our research provides insight into the molecular mechanism underlying LPS-induced inflammation in vitro, which may unveil new targets for the treatment of endometritis.
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Affiliation(s)
- Chenbo Yan
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450000, People's Republic of China
| | - Haimiao Lv
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450000, People's Republic of China
| | - Zhan Peng
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450000, People's Republic of China
| | - Dexin Yang
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450000, People's Republic of China
| | - Puxiu Shen
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450000, People's Republic of China
| | - Jingcheng Yu
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450000, People's Republic of China
| | - Chao Tong
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450000, People's Republic of China; Wuhu Overseas Students Pioneer Park, Wuhu, 241006, PR China.
| | - Xinzhuang Wang
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450000, People's Republic of China.
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Raheel IAER, Hassan WH, Salem SSR, Salam HSH. Biofilm forming potentiality of Escherichia coli isolated from bovine endometritis and their antibiotic resistance profiles. J Adv Vet Anim Res 2020; 7:442-451. [PMID: 33005670 PMCID: PMC7521812 DOI: 10.5455/javar.2020.g440] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 05/22/2020] [Accepted: 05/29/2020] [Indexed: 01/08/2023] Open
Abstract
OBJECTIVE The objectives of this study were to determine the biofilm-forming capability and antimicrobial susceptibility of Escherichia coli recovered from bovine endometritis samples. MATERIALS AND METHODS A total of 120 uterine specimens were collected from cows suffering from endometritis for bacteriological examination. Antimicrobial susceptibility testing was carried out for all isolated E. coli by using the disc diffusion method. The isolates were phenotypically studied for biofilm-forming ability by cultivation on yeast extract -casamino acids Congo red agar (CRA). Some randomly selected isolates were chosen for the molecular identification of some virulence and resistance genes. RESULTS A total of 58(48.3%) E. coli isolates could be isolated from the 120 samples. Antimicrobial susceptibility testing exhibited that 91.4%, 79.3%, 79.3%, 74.1%, and 58.6% of the isolates were sensitive to gentamicin, amoxicillin-clavulanic acid, ciprofloxacin, cephalexin, and sulfamethoxazole- trimethoprim, respectively. On the other hand, 91.4% and 70.7% isolates were resistant to cefotaxime and doxycycline, respectively. Cultivation on CRA revealed that 46.6% of isolates were biofilm producers. The molecular detection of resistance and virulence genes declared that all isolates harbored bla TEM, sul1, tetA, qnrS, bla CTX-M , and fimH with a percentage of 100%, papC (40%), and hlyA (10%). FimH was the most prevalent biofilm-associated gene. CONCLUSION The present study highlights the high prevalence of multi-drug- resistant E. coli associated with bovine endometritis. The detection of the fimH gene is circumstantial evidenced that this gene has a crucial role in biofilm formation in intrauterine pathogenic E. coli.
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Affiliation(s)
| | - Walid Hamdy Hassan
- Department of Bacteriology, Mycology and Immunology, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef, Egypt
| | - Shaaban Salem Radwan Salem
- Department of Bacteriology, Mycology and Immunology, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef, Egypt
| | - Hala Sayed Hassan Salam
- Department of Bacteriology, Mycology and Immunology, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef, Egypt
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Zhang C, Wang L, Li T, Mao W, Liu B, Cao J. EP2/4 Receptors Promote the Synthesis of PGE 2 Increasing Tissue Damage in Bovine Endometrial Explants Induced by Escherichia coli. J Pharmacol Exp Ther 2019; 372:175-184. [PMID: 31732699 DOI: 10.1124/jpet.119.262444] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 11/11/2019] [Indexed: 12/17/2022] Open
Abstract
The bovine uterine is easily contaminated with bacteria during coitus or parturition. A previous study suggested that prostaglandin E2 (PGE2) promoted Escherichia coli-infected bovine endometrial tissue inflammatory damage via cyclooxygenase-2 (COX-2) and microsomal prostaglandin E synthase-1 (mPGES-1). However, it remains unclear which PGE2 receptors regulate the proinflammatory effect of PGE2 In this study, we evaluated the effect of PGE2 and its mediated receptors on E. coli-infected endometrium explants isolated from the bovine uterus. The E. coli-infected bovine endometrial explants were cultured in vitro, and the study used EP2/4 receptor agonists to investigate the responses of COX-2, mPGES-1, PGE2, proinflammatory factors, and damage-associated molecular patterns (DAMPs). The expression of COX-2, mPGES-1, PGE2, proinflammatory factors, and DAMPs was significantly increased after infection with E. coli; however, the high expression levels caused by E. coli were reduced following treatment with COX-2 and mPGES-1 inhibitors. In addition, the expression levels of COX-2, mPGES-1, PGE2, proinflammatory factors, and DAMPs were higher in treatment with EP2/4 receptor agonists in E. coli-infected endometrium explants, and their promotable effects were effectively blocked by EP2/4 receptor antagonists. These findings provide evidence that PGE2 may promote the progress of inflammation in endometrial explants infected with E. coli in bovines. Furthermore, EP2/4 may be involved in a positive feedback loop for COX-2 and mPGES-1 expression, and this may be responsible for the proinflammatory reaction of PGE2 in E. coli-infected uteri of bovines. SIGNIFICANCE STATEMENT: PGE2 promoted E. coli-infected bovine endometrial tissue damage via COX-2 and mPGES-1. However, this proinflammatory effect of PGE2 depends on which receptors are affected by PGE2, and this remains unclear. In this study, it was investigated that EP2 and EP4 may be involved in a positive feedback loop for COX-2 and mPGES-1 expression, and this may be responsible for the proinflammatory reaction of PGE2 in E. coli-infected uteri of bovines.
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Affiliation(s)
- Chao Zhang
- Laboratory of Veterinary Pharmacology, College of Veterinary Medicine (C.Z., L.W., T.L., W.M., B.L., J.C.), and Key Laboratory of Clinical Diagnosis and Treatment Techniques for Animal Disease, Ministry of Agriculture (C.Z., L.W., T.L., W.M., B.L., J.C.), Inner Mongolia Agricultural University, Huhhot, China
| | - Lingrui Wang
- Laboratory of Veterinary Pharmacology, College of Veterinary Medicine (C.Z., L.W., T.L., W.M., B.L., J.C.), and Key Laboratory of Clinical Diagnosis and Treatment Techniques for Animal Disease, Ministry of Agriculture (C.Z., L.W., T.L., W.M., B.L., J.C.), Inner Mongolia Agricultural University, Huhhot, China
| | - Tingting Li
- Laboratory of Veterinary Pharmacology, College of Veterinary Medicine (C.Z., L.W., T.L., W.M., B.L., J.C.), and Key Laboratory of Clinical Diagnosis and Treatment Techniques for Animal Disease, Ministry of Agriculture (C.Z., L.W., T.L., W.M., B.L., J.C.), Inner Mongolia Agricultural University, Huhhot, China
| | - Wei Mao
- Laboratory of Veterinary Pharmacology, College of Veterinary Medicine (C.Z., L.W., T.L., W.M., B.L., J.C.), and Key Laboratory of Clinical Diagnosis and Treatment Techniques for Animal Disease, Ministry of Agriculture (C.Z., L.W., T.L., W.M., B.L., J.C.), Inner Mongolia Agricultural University, Huhhot, China
| | - Bo Liu
- Laboratory of Veterinary Pharmacology, College of Veterinary Medicine (C.Z., L.W., T.L., W.M., B.L., J.C.), and Key Laboratory of Clinical Diagnosis and Treatment Techniques for Animal Disease, Ministry of Agriculture (C.Z., L.W., T.L., W.M., B.L., J.C.), Inner Mongolia Agricultural University, Huhhot, China
| | - Jinshan Cao
- Laboratory of Veterinary Pharmacology, College of Veterinary Medicine (C.Z., L.W., T.L., W.M., B.L., J.C.), and Key Laboratory of Clinical Diagnosis and Treatment Techniques for Animal Disease, Ministry of Agriculture (C.Z., L.W., T.L., W.M., B.L., J.C.), Inner Mongolia Agricultural University, Huhhot, China
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Yin P, Zhang Z, Li J, Shi Y, Jin N, Zou W, Gao Q, Wang W, Liu F. Ferulic acid inhibits bovine endometrial epithelial cells against LPS-induced inflammation via suppressing NK-κB and MAPK pathway. Res Vet Sci 2019; 126:164-169. [DOI: 10.1016/j.rvsc.2019.08.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 07/29/2019] [Accepted: 08/12/2019] [Indexed: 12/15/2022]
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12
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Zhao G, Zhang T, Wu H, Jiang K, Qiu C, Deng G. MicroRNA let-7c Improves LPS-Induced Outcomes of Endometritis by Suppressing NF-κB Signaling. Inflammation 2019; 42:650-657. [PMID: 30406463 DOI: 10.1007/s10753-018-0922-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Endometritis is a common inflammatory disease which endangers human and animal reproductive health. MicroRNA (miRNA) let-7c plays an important role in the inflammatory process; however, the regulatory underlying mechanism of let-7c in endometritis is unclear. In this study, we confirmed that let-7c was significantly reduced in LPS-induced mouse endometritis model, and overexpression of let-7c was able to effectively reduce uterine tissue damage caused by lipopolysaccharide (LPS), and then, a LPS-induced bovine endometrial epithelial cell (BEND) line was used to mimic the inflammatory model in vitro. Our data showed that overexpression of let-7c significantly reduced the expression of pro-inflammatory cytokines in BEND cells induced by LPS. Meanwhile, immunofluorescence and western blotting results showed that let-7c significantly inhibited LPS-induced phosphorylation of NF-κB, thereby inhibiting downstream pro-inflammatory cytokine expression. Taken together, our results suggested that let-7c ameliorates LPS-induced endometritis by attenuating the expression of pro-inflammatory cytokines via inhibition of the activation of NF-κB.
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Affiliation(s)
- Gan Zhao
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Tao Zhang
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Haichong Wu
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Kangfeng Jiang
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Changwei Qiu
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Ganzhen Deng
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China.
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Bai J, Wang X, Hao M, Li H, Cheng G, Liu D, Yang Y, Li Y. Forsythiaside attenuates Escherichia coli lipopolysaccharide-induced liver acute inflammatory response in chicken. EUR J INFLAMM 2019. [DOI: 10.1177/2058739219826793] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
This study investigated the effects of forsythiaside on the acute inflammatory response induced by Escherichia coli lipopolysaccharide (LPS) in liver of broiler chickens. Fifteen-day-old chickens were randomly assigned to three groups (n = 20 for each group, orally treated with 0, 30, or 60 mg/kg BW of forsythiaside) for 7 days. At 21 days of age, the chickens were intravenously injected with either LPS (200 μg/kg BW) or sterile saline (200 μg/kg BW, control group). All the chickens were humanely euthanized by cervical dislocation 2 h after the LPS injection. The results showed that the injection of LPS induced some indexes, including total proteins, nitric oxide (NO), interleukin-1beta (IL-1β), interleukin-6 (IL-6), and interleukin-17 (IL-17) production ( P < 0.05) and increased the mRNA expression of LPS-induced tumor necrosis factor-alpha (LITAF), IL-1β, IL-17, IL-6, and inducible nitric oxide synthase (iNOS) ( P < 0.05). Forsythiaside supplementation alleviated the LPS-induced inflammatory response by inhibiting the production of total proteins, NO, LITAF, IL-1β, IL-17, and IL-6 and down-regulating the mRNA expression of pro-inflammatory cytokines and iNOS. In conclusion, forsythiaside is a potential treatment for LPS-induced liver acute inflammation in chicken.
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Affiliation(s)
- Jingwen Bai
- College of Science, Northeast Agricultural University, Harbin, China
| | - Xiaoting Wang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
| | - Meiqi Hao
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
| | - He Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
| | | | - Di Liu
- Heilongjiang Academy of Agricultural Sciences, Harbin, China
| | - Yu Yang
- College of Science, Northeast Agricultural University, Harbin, China
| | - Yanhua Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
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Yin N, Yang Y, Wang X, Yang C, Ma X, Shaukat A, Zhao G, Deng G. MiR-19a mediates the negative regulation of the NF-κB pathway in lipopolysaccharide-induced endometritis by targeting TBK1. Inflamm Res 2019; 68:231-240. [PMID: 30673803 DOI: 10.1007/s00011-019-01213-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 01/05/2019] [Accepted: 01/08/2019] [Indexed: 12/18/2022] Open
Abstract
OBJECTIVE In both humans and animals, endometritis is severe inflammation of the uterus, and it causes great economic losses in dairy cow production. MicroRNAs have been reported to play an important role in various inflammatory diseases. However, the regulatory mechanisms of miR-19a in endometritis remain unclear. Thus, the aims of this study are to investigate the role of miR-19a in a mouse model of lipopolysaccharide (LPS)-induced endometritis and elucidate the possible mechanisms in bovine endometrial epithelial cells (bEECs). METHODS AND RESULTS Histological analysis showed that LPS induced severe pathological changes, suggesting that the endometritis mouse model was well established. The qPCR assay indicated that miR-19a expression in the uterine tissues of mice with endometritis and in bEECs with LPS stimulation was significantly reduced. The overexpression of miR-19a significantly decreased the expression of inflammatory cytokines (TNF-α, IL-6 and IL-1β) and the phosphorylation of NF-κB p65 and IκBα. Similar results were also obtained following the knockdown of TBK1. Furthermore, a dual luciferase reporter assay further validated that miR-19a inhibited TBK1 expression by binding directly to the 3'-UTR of TBK1. CONCLUSION We demonstrated that miR-19a has anti-inflammatory effects and mediates the negative regulation of the NF-κB Pathway in LPS-induced endometritis by targeting TBK1.
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Affiliation(s)
- Nannan Yin
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Yaping Yang
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Xiaoyan Wang
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Chao Yang
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Xiaofei Ma
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Aftab Shaukat
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Gan Zhao
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Ganzhen Deng
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China.
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15
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Wu H, Dai A, Chen X, Yang X, Li X, Huang C, Jiang K, Deng G. Leonurine ameliorates the inflammatory responses in lipopolysaccharide-induced endometritis. Int Immunopharmacol 2018; 61:156-161. [DOI: 10.1016/j.intimp.2018.06.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 05/09/2018] [Accepted: 06/01/2018] [Indexed: 01/06/2023]
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16
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Lyu A, Chen JJ, Wang HC, Yu XH, Zhang ZC, Gong P, Jiang LS, Liu FH. Punicalagin protects bovine endometrial epithelial cells against lipopolysaccharide-induced inflammatory injury. J Zhejiang Univ Sci B 2018; 18:481-491. [PMID: 28585424 DOI: 10.1631/jzus.b1600224] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE Bovine endometritis is one of the most common reproductive disorders in cattle. The aim of this study was to investigate the anti-inflammation potential of punicalagin in lipopolysaccharide (LPS)-induced bovine endometrial epithelial cells (bEECs) and to uncover the underlying mechanisms. METHODS bEECs were stimulated with different concentrations (1, 10, 30, 50, and 100 μg/ml) of LPS for 3, 6, 9, 12, and 18 h. MTT assay was used to assess cell viability and to identify the conditions for inflammatory injury and effective concentrations of punicalagin. Quantitative real-time polymerase chain reaction (qRT-PCR) was used to assess gene expression of pro-inflammatory cytokines. Western blotting was used to assess levels of inflammation-related proteins. RESULTS Treatment of bEECs with 30 µg/ml LPS for 12 h induced cell injury and reduced cell viability. Punicalagin (5, 10, or 20 µg/ml) pretreatment significantly decreased LPS-induced productions of interleukin (IL)-1β, IL-6, IL-8, and tumor necrosis factor-α (TNF-α) in bEECs. Molecular research showed that punicalagin inhibited the activation of the upstream mediator nuclear factor-κB (NF-κB) by suppressing the production of inhibitor κBα (IκBα) and phosphorylation of p65. Results also indicated that punicalagin can suppress the phosphorylation of mitogen-activated protein kinases (MAPKs) including p38, c-Jun N-terminal kinase (JNK), and extracellular signal-regulated kinase (ERK). CONCLUSIONS Punicalagin may attenuate LPS-induced inflammatory injury and provide a potential option for the treatment of dairy cows with Escherichia coli endometritis.
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Affiliation(s)
- An Lyu
- Beijing Key Laboratory for Dairy Cow Nutrition, College of Animal Science and Technology, Beijing University of Agriculture, Beijing 102206, China
| | - Jia-Jia Chen
- Beijing Key Laboratory for Dairy Cow Nutrition, College of Animal Science and Technology, Beijing University of Agriculture, Beijing 102206, China
| | - Hui-Chuan Wang
- Beijing Key Laboratory for Dairy Cow Nutrition, College of Animal Science and Technology, Beijing University of Agriculture, Beijing 102206, China
| | - Xiao-Hong Yu
- Beijing Key Laboratory for Dairy Cow Nutrition, College of Animal Science and Technology, Beijing University of Agriculture, Beijing 102206, China
| | - Zhi-Cong Zhang
- Beijing Key Laboratory for Dairy Cow Nutrition, College of Animal Science and Technology, Beijing University of Agriculture, Beijing 102206, China
| | - Ping Gong
- Beijing Key Laboratory for Dairy Cow Nutrition, College of Animal Science and Technology, Beijing University of Agriculture, Beijing 102206, China
| | - Lin-Shu Jiang
- Beijing Key Laboratory for Dairy Cow Nutrition, College of Animal Science and Technology, Beijing University of Agriculture, Beijing 102206, China
| | - Feng-Hua Liu
- Beijing Key Laboratory for Dairy Cow Nutrition, College of Animal Science and Technology, Beijing University of Agriculture, Beijing 102206, China
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17
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Yang F, Zhang S, Shang X, Wang L, Li H, Wang X. Characteristics of quinolone-resistant Escherichia coli isolated from bovine mastitis in China. J Dairy Sci 2018; 101:6244-6252. [PMID: 29605334 DOI: 10.3168/jds.2017-14156] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 02/25/2018] [Indexed: 01/21/2023]
Abstract
Escherichia coli is the leading causative agent of bovine mastitis worldwide. Quinolone-resistant E. coli is becoming a potential threat to veterinary and public health. The aim of this study was to investigate the characteristics of quinolone-resistant E. coli isolated from bovine mastitis cases in China. Antimicrobial susceptibility of the isolates against 15 antimicrobial agents was determined by disc diffusion method. Phylogenetic grouping was detected by PCR. Extended-spectrum β-lactamase-producing isolates were determined by double-disc synergy test. In addition, the plasmid-mediated quinolone resistance (PMQR) and β-lactamase-encoding genes, as well as mutations of quinolone resistance-determining regions in GyrA, GyrB, ParC, and ParE, were measured by PCR and DNA sequencing. Overall, 75 (22.9%) out of 328 E. coli isolates were confirmed as ciprofloxacin-resistant from 2,954 mastitic milk samples. Phylogenetic group analysis showed that the majority of these strains belonged to phylogenetic group A (57.3%) and group B1 (24.0%). All the resistant isolates were identified as multidrug resistant, showing high resistance to cephalosporins and non-β-lactams. Forty-nine (65.3%) of the quinolone-resistant isolates were positive for PMQR genes; aac-(6')-Ib-cr was the most common PMQR determinant detected in 33 (44.0%) isolates. Eighteen (24.0%), 4 (5.3%), 3 (4.0%), and 1 (1.3%) of the quinolone-resistant isolates were harboring oqxA/B, qepA4, qnrS, and qnrB2, respectively. Additionally, 55 (73.3%) of the quinolone-resistant E. coli isolates were found to be extended-spectrum β-lactamase producers. The preponderant β-lactamase-encoding gene, blaTEM, was detected in 44 (58.7%) isolates; blaCTX-M, blaCMY, and blaSHV were found in 35 (46.7%), 22 (29.3%), and 2 (2.7%) isolates, respectively. Moreover, the most frequently identified substitutions were S83L/D87N or S83L in GyrA, detected in all of the quinolone-resistant isolates. Meanwhile, 74 (98.7%), 33 (44.0%), and 6 (8.0%) of the isolates were carrying substitutions S80I in ParC, S458A in ParE, and S492N in GyrB, respectively. All 58 (77.3%) isolates with a high level of ciprofloxacin resistance (>32 µg/mL) carried single or double mutations in GyrA combined with single mutation in ParC. To the best of our knowledge, this is the first report on the high occurrence of PMQR determinants and quinolone-determining resistant regions mutations in quinolone-resistant E. coli isolated from bovine mastitis in China.
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Affiliation(s)
- Feng Yang
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Science, Lanzhou 730050, People's Republic of China
| | - Shidong Zhang
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Science, Lanzhou 730050, People's Republic of China
| | - Xiaofei Shang
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Science, Lanzhou 730050, People's Republic of China
| | - Ling Wang
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Science, Lanzhou 730050, People's Republic of China
| | - Hongsheng Li
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Science, Lanzhou 730050, People's Republic of China.
| | - Xurong Wang
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences of Chinese Academy of Agricultural Science, Lanzhou 730050, People's Republic of China.
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18
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Cheng P, Wang T, Li W, Muhammad I, Wang H, Sun X, Yang Y, Li J, Xiao T, Zhang X. Baicalin Alleviates Lipopolysaccharide-Induced Liver Inflammation in Chicken by Suppressing TLR4-Mediated NF-κB Pathway. Front Pharmacol 2017; 8:547. [PMID: 28868036 PMCID: PMC5563358 DOI: 10.3389/fphar.2017.00547] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Accepted: 08/04/2017] [Indexed: 12/31/2022] Open
Abstract
As a kind of potent stimulus, lipopolysaccharide (LPS) has the ability to cause cell damage by activating toll-like receptor(TLR)4, then nuclear factor kappa B (NF-κB) translocates into the nucleus and changes the expression of related inflammatory genes. Baicalin is extracted from Radix Scutellariae, which possesses anti-inflammation, antioxidant and antibacterial properties. However, the effects of it on LPS-induced liver inflammation have not been fully elucidated. This study aims to investigate the anti-inflammatory effects of Baicalin on the LPS-induced liver inflammation and its underlying molecular mechanisms in chicken. The results of histopathological changes, serum biochemical analysis, NO levels and myeloperoxidase activity showed that Baicalin pretreatment ameliorated LPS-induced liver inflammation. ELISA and qPCR assays showed that Baicalin dose-dependently suppressed the production of IL-1β, IL-6, and TNF-α. Furthermore, the mRNA expression of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) were significantly decreased by Baicalin. TLR4 is an important sensor in LPS infection. Molecular studies showed that the expression of TLR4 was inhibited by Baicalin pretreatment. In addition, Baicalin pretreatment inhibited NF-kB signaling pathway activation. All results demonstrated the protective effects of Baicalin pretreatment against LPS-induced liver inflammation in chicken via negative regulation of inflammatory mediators through the down-regulation of TLR4 expression and the inhibition of NF-kB activation.
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Affiliation(s)
- Ping Cheng
- Department of Basic Veterinary Science, College of Veterinary Medicine, Northeast Agricultural UniversityHarbin, China
| | - Tong Wang
- Department of Basic Veterinary Science, College of Veterinary Medicine, Northeast Agricultural UniversityHarbin, China
| | - Wei Li
- Department of Basic Veterinary Science, College of Veterinary Medicine, Northeast Agricultural UniversityHarbin, China
| | - Ishfaq Muhammad
- Department of Basic Veterinary Science, College of Veterinary Medicine, Northeast Agricultural UniversityHarbin, China
| | - He Wang
- Department of Basic Veterinary Science, College of Veterinary Medicine, Northeast Agricultural UniversityHarbin, China
| | - Xiaoqi Sun
- Department of Basic Veterinary Science, College of Veterinary Medicine, Northeast Agricultural UniversityHarbin, China
| | - Yuqi Yang
- Department of Basic Veterinary Science, College of Veterinary Medicine, Northeast Agricultural UniversityHarbin, China
| | - Jiarui Li
- Department of Basic Veterinary Science, College of Veterinary Medicine, Northeast Agricultural UniversityHarbin, China
| | - Tianshi Xiao
- Department of Basic Veterinary Science, College of Veterinary Medicine, Northeast Agricultural UniversityHarbin, China
| | - Xiuying Zhang
- Department of Basic Veterinary Science, College of Veterinary Medicine, Northeast Agricultural UniversityHarbin, China
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Touwendsida SB, Bissoume SB, Hadiza BI, Gertrude BT, Rene D, Abdoul AW, Evariste B, Alfred ST, Nicolas B, Amy GS. Isolation and characterization of enteropathogenic and enterotoxinogenic Escherichia coli from dairy products consumed in Burkina Faso. ACTA ACUST UNITED AC 2017. [DOI: 10.5897/ajmr2017.8485] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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20
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Nayme K, Barguigua A, Bouchrif B, Karraouan B, El Otmani F, Elmdaghri N, Zerouali K, Timinouni M. Genotypic characterization of quinolone resistant-Escherichia coli isolates from retail food in Morocco. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2017; 52:107-114. [PMID: 28099089 DOI: 10.1080/03601234.2016.1239985] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2016] [Accepted: 08/24/2016] [Indexed: 06/06/2023]
Abstract
This study was conducted to assess the retail food as a possible vehicle for antimicrobial resistant, particularly quinolones resistant and pathogenic Escherichia coli. We determined the prevalence and characteristics of nalidixic acid (Nal) resistant E. coli isolates from diverse retail food samples. In all, 70 (28%) of 250 E. coli isolates studied were Nal-resistant E. coli and 91% of these were multi-drug resistant. Plasmid mediated quinolone resistance genes were identified in 32 isolates, including aac(6')-Ib-cr (n = 16), qnrS1 (n = 11) and qnrB19 (n = 7). Mutations in gyr A and par C genes were detected among 80% of the isolates, and the isolates showed substitution Ser83-Leu and Asp87-Asn in gyrA and Ser80-Ile in parC. In addition, three different gene cassettes were identified (aadA1, aadA7, aac(3)-Id) in 18%. Virulence-associated genes stx1, eae, sfa, hlyA and stx2 were found in six (8%), three (4%), two (3%), three (4%) and three (4%) isolates, respectively. E. coli isolates of phylogenetic group A were dominant (64%, 45/70). Pulsed field gel electrophoresis revealed none epidemiological relationship between these isolates. The results of this work report the higher frequency of Nal-resistant E. coli isolates from Moroccan retail food samples including MDR and pathogenic isolates.
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Affiliation(s)
- Kaotar Nayme
- a Molecular Bacteriology Laboratory, Institut Pasteur du Maroc , Casablanca , Morocco
- b Microbiology Laboratory, Faculty of Medicine and Pharmacy, University Hassan II , Casablanca , Morocco
| | - Abouddihaj Barguigua
- c Faculty of Medicine and Pharmacy, University Sultan Moulay Slimane , Beni Mellal , Morocco
| | - Brahim Bouchrif
- d Food Microbiology Laboratory, Institut Pasteur du Maroc , Casablanca , Morocco
| | - Bouchra Karraouan
- e Microbiology, Health and Environment Team Research, Department of Biology , Faculty of Sciences, ChouaibDoukkali University , El Jadida , Morocco
| | | | - Naima Elmdaghri
- a Molecular Bacteriology Laboratory, Institut Pasteur du Maroc , Casablanca , Morocco
- b Microbiology Laboratory, Faculty of Medicine and Pharmacy, University Hassan II , Casablanca , Morocco
- f University Hospital Center Ibn Rochd , Casablanca , Morocco
| | - Khalid Zerouali
- b Microbiology Laboratory, Faculty of Medicine and Pharmacy, University Hassan II , Casablanca , Morocco
- f University Hospital Center Ibn Rochd , Casablanca , Morocco
| | - Mohammed Timinouni
- a Molecular Bacteriology Laboratory, Institut Pasteur du Maroc , Casablanca , Morocco
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Adler A, Sturlesi N, Fallach N, Zilberman-Barzilai D, Hussein O, Blum SE, Klement E, Schwaber MJ, Carmeli Y. Gentamicin- and Ciprofloxacin-Resistant Enterobacteriaceae in Cattle Farms in Israel: Risk Factors for Carriage and the Effect of Microbiological Methodology on the Measured Prevalence. Microb Drug Resist 2016; 23:660-665. [PMID: 27828758 DOI: 10.1089/mdr.2016.0052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Our objectives were to establish a methodology for surveillance of ciprofloxacin-resistant Enterobacteriaceae and gentamicin-resistant Enterobacteriaceae (CPRE and GNRE, respectively) in cattle and to study the prevalence and risk factors for carriage of these bacteria in a national survey. This was a point prevalence study conducted from July to October 2013 in Israel. Stool samples were collected from 1,226 cows in 123 sections of 40 farms of all production types. The number of CPRE- and GNRE-positive cows was highest in quarantine stations and fattening farms and was lowest in pasture farms (p < 0.01). The number of CPRE- and GNRE-positive cows was lowest in dairy farm sections containing adult cows (>25 months) and highest in calves (<4 months) (p < 0.001). In bivariate analysis, other variables that were significant risk factors for CPRE and GNRE carriage included fewer troughs, crowding, lack of manure cleaning, and recent arrival of new calves. Antimicrobial prophylaxis was given almost exclusively to calves and was associated with a higher prevalence of carriers (p < 0.001). Compared to the use of nonselective media (MacConkey agar alone), the use of selective media (MacConkey agar with 10 μg/ml of ciprofloxacin or 5 μg/ml of gentamicin) increased the sensitivity of screening for CPRE and GNRE by 6.6- and 13.5-fold, respectively. CPRE and GNRE were identified in 609 (49.7%) and 840 (68.5%) samples, respectively. This study provides novel data regarding both the epidemiology of CPRE and GNRE carriage in livestock and the microbiological methodology for their surveillance.
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Affiliation(s)
- Amos Adler
- 1 National Center for Infection Control , Ministry of Health, Tel-Aviv, Israel .,2 Tel-Aviv Sourasky Medical Center, Affiliated with the Sackler Faculty of Medicine, Tel-Aviv University , Tel-Aviv, Israel
| | - Na'ama Sturlesi
- 3 Koret School of Veterinary Medicine, Hebrew University , Rehovot, Israel
| | - Noga Fallach
- 1 National Center for Infection Control , Ministry of Health, Tel-Aviv, Israel
| | | | - Omar Hussein
- 1 National Center for Infection Control , Ministry of Health, Tel-Aviv, Israel
| | | | - Eyal Klement
- 3 Koret School of Veterinary Medicine, Hebrew University , Rehovot, Israel
| | - Mitchell J Schwaber
- 1 National Center for Infection Control , Ministry of Health, Tel-Aviv, Israel
| | - Yehuda Carmeli
- 1 National Center for Infection Control , Ministry of Health, Tel-Aviv, Israel
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22
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Wu H, Zhao G, Jiang K, Li C, Qiu C, Deng G. Engeletin Alleviates Lipopolysaccharide-Induced Endometritis in Mice by Inhibiting TLR4-mediated NF-κB Activation. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:6171-6178. [PMID: 27411287 DOI: 10.1021/acs.jafc.6b02304] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Engeletin (dihydrokaempferol 3-rhamnoside) is a flavanonol glycoside. It can be found in the skin of white grapes and white wine and is widely distributed in southeast Asia, and the leaves are used in a tea. Here, we explored the impact of engeletin against the inflammatory reaction in a lipopolysaccharide (LPS)-induced endometritis mouse model. Engeletin treatment significantly attenuated uterus damage and decreased myeloperoxidase activity. ELISA and qPCR assays showed that engeletin dose-dependently suppressed the expression of TNF-α, IL-1β, and IL-6. Molecular studies also demonstrated that the levels of iNOS, COX-2, and TLR4, along with their downstream molecules MyD88, IRAK1, TRAF6, and TAK1, were also suppressed by engeletin. In addition, engeletin treatment inhibited NF-κB signaling-pathway activation. Moreover, immunofluorescence analysis demonstrated that engeletin suppressed NF-κB-p65 nuclear translocation. These data indicated the protective action of engeletin against LPS-stimulated endometritis in mice via negative regulation of pro-inflammatory mediators via the TLR4-regulated NF-κB pathway.
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Affiliation(s)
- Haichong Wu
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University , Wuhan 430070, People's Republic of China
| | - Gan Zhao
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University , Wuhan 430070, People's Republic of China
| | - Kangfeng Jiang
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University , Wuhan 430070, People's Republic of China
| | - Chengye Li
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University , Wuhan 430070, People's Republic of China
| | - Changwei Qiu
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University , Wuhan 430070, People's Republic of China
| | - Ganzhen Deng
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University , Wuhan 430070, People's Republic of China
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23
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Balakrishnan S, Antony PX, Mukhopadhyay HK, Pillai RM, Thanislass J, Padmanaban V, Srinivas MV. Genetic characterization of fluoroquinolone-resistant Escherichia coli associated with bovine mastitis in India. Vet World 2016; 9:705-9. [PMID: 27536030 PMCID: PMC4983120 DOI: 10.14202/vetworld.2016.705-709] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Accepted: 06/03/2016] [Indexed: 11/16/2022] Open
Abstract
AIM The present study was undertaken to characterize the mutation in gyrA (DNA gyrase) and parC (topoisomerase IV) genes responsible for fluoroquinolone resistance in Escherichia coli isolates associated with the bovine mastitis. MATERIALS AND METHODS A total of 92 milk samples from bovine mastitis cases were sampled in and around Puducherry (Southern India). Among these samples, 30 isolates were bacteriologically characterized as E. coli. Minimum inhibitory concentrations (MIC) of fluoroquinolones of these 30 E. coli isolates were evaluated by resazurin microtiter assay. Then, the quinolone resistance determining region (QRDR) (gyrA and parC genes) of these E. coli isolates was genetically analyzed for determining the chromosomal mutation causing fluoroquinolone resistance. RESULTS E. coli isolates showed a resistance rate of 63.33%, 23.33% and 30.03% to nalidixic acid, ciprofloxacin and enrofloxacin, respectively. Mutations were found at 83(rd) and 87(th) amino acid position of gyrA gene, and at 80(th) and 108(th) amino acid position of parC gene in our study isolates. Among these five isolates, one had a single mutation at 83 amino acid position of gyrA with reduced susceptibility (0.5 µg/ml) to ciprofloxacin. Then, in remaining four isolates, three isolates showed triple mutation (at gyrA: S83⟶L and D87⟶N; at parC: S80⟶I) and the fifth isolate showed an additional mutation at codon 108 of parC (A108⟶T) with the increased ciprofloxacin MIC of 16-128 µg/ml. The most common mutation noticed were at S83⟶L and D87⟶N of gyrA and S80⟶I of ParC. CONCLUSION The study confirms the presence of mutation/s responsible for fluoroquinolone resistance in QRDR of gyrA and parC genes of E. coli isolates of animal origin, and there is increased rate of fluoroquinolone resistance with high-level of MIC. The mutations observed in this study were similar to that of human isolates.
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Affiliation(s)
- Sangeetha Balakrishnan
- Department of Veterinary Microbiology, Rajiv Gandhi Institute of Veterinary Education and Research, Puducherry - 605 009, India
| | - Prabhakar Xavier Antony
- Department of Veterinary Microbiology, Rajiv Gandhi Institute of Veterinary Education and Research, Puducherry - 605 009, India
| | - Hirak Kumar Mukhopadhyay
- Department of Veterinary Microbiology, Rajiv Gandhi Institute of Veterinary Education and Research, Puducherry - 605 009, India
| | - Raghavan Madhusoodanan Pillai
- Department of Veterinary Microbiology, Rajiv Gandhi Institute of Veterinary Education and Research, Puducherry - 605 009, India
| | - Jacob Thanislass
- Department of Veterinary Biochemistry, Rajiv Gandhi Institute of Veterinary Education and Research, Puducherry - 605 009, India
| | - Vijayalakshmi Padmanaban
- Department of Veterinary Medicine, Rajiv Gandhi Institute of Veterinary Education and Research, Puducherry - 605 009, India
| | - Mouttou Vivek Srinivas
- Department of Veterinary Microbiology, Rajiv Gandhi Institute of Veterinary Education and Research, Puducherry - 605 009, India
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