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Kounatidis D, Dalamaga M, Grivakou E, Karampela I, Koufopoulos P, Dalopoulos V, Adamidis N, Mylona E, Kaziani A, Vallianou NG. Third-Generation Tetracyclines: Current Knowledge and Therapeutic Potential. Biomolecules 2024; 14:783. [PMID: 39062497 PMCID: PMC11275049 DOI: 10.3390/biom14070783] [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] [Received: 05/26/2024] [Revised: 06/24/2024] [Accepted: 06/27/2024] [Indexed: 07/28/2024] Open
Abstract
Tetracyclines constitute a unique class of antibiotic agents, widely prescribed for both community and hospital infections due to their broad spectrum of activity. Acting by disrupting protein synthesis through tight binding to the 30S ribosomal subunit, their interference is typically reversible, rendering them bacteriostatic in action. Resistance to tetracyclines has primarily been associated with changes in pump efflux or ribosomal protection mechanisms. To address this challenge, tetracycline molecules have been chemically modified, resulting in the development of third-generation tetracyclines. These novel tetracyclines offer significant advantages in treating infections, whether used alone or in combination therapies, especially in hospital settings. Beyond their conventional antimicrobial properties, research has highlighted their potential non-antibiotic properties, including their impact on immunomodulation and malignancy. This review will focus on third-generation tetracyclines, namely tigecycline, eravacycline, and omadacycline. We will delve into their mechanisms of action and resistance, while also evaluating their pros and cons over time. Additionally, we will explore their therapeutic potential, analyzing their primary indications of prescription, potential future uses, and non-antibiotic features. This review aims to provide valuable insights into the clinical applications of third-generation tetracyclines, thereby enhancing understanding and guiding optimal clinical use.
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Affiliation(s)
- Dimitris Kounatidis
- Diabetes Center, First Department of Propaedeutic Internal Medicine, Laiko General Hospital, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece;
| | - Maria Dalamaga
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece;
| | - Eugenia Grivakou
- Department of Internal Medicine, Evangelismos General Hospital, 10676 Athens, Greece; (E.G.); (E.M.); (A.K.)
| | - Irene Karampela
- Second Department of Critical Care, Attikon General University Hospital, Medical School, National and Kapodistrian University of Athens, 12462 Athens, Greece;
| | - Petros Koufopoulos
- First Department of Internal Medicine, Sismanogleio General Hospital, 15126 Athens, Greece; (P.K.); (V.D.); (N.A.)
| | - Vasileios Dalopoulos
- First Department of Internal Medicine, Sismanogleio General Hospital, 15126 Athens, Greece; (P.K.); (V.D.); (N.A.)
| | - Nikolaos Adamidis
- First Department of Internal Medicine, Sismanogleio General Hospital, 15126 Athens, Greece; (P.K.); (V.D.); (N.A.)
| | - Eleni Mylona
- Department of Internal Medicine, Evangelismos General Hospital, 10676 Athens, Greece; (E.G.); (E.M.); (A.K.)
| | - Aikaterini Kaziani
- Department of Internal Medicine, Evangelismos General Hospital, 10676 Athens, Greece; (E.G.); (E.M.); (A.K.)
| | - Natalia G. Vallianou
- First Department of Internal Medicine, Sismanogleio General Hospital, 15126 Athens, Greece; (P.K.); (V.D.); (N.A.)
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Xiao Y, Xiong T, Meng X, Yu D, Xiao Z, Song L. Different influences on mitochondrial function, oxidative stress and cytotoxicity of antibiotics on primary human neuron and cell lines. J Biochem Mol Toxicol 2018; 33:e22277. [PMID: 30597674 DOI: 10.1002/jbt.22277] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 10/28/2018] [Accepted: 10/31/2018] [Indexed: 02/06/2023]
Abstract
Although antibiotics are generally well tolerated, their toxic effects on the central nervous system have been gained attention. In this study, we systematically investigated the neuron toxicity of antibiotics from six different classes. We show that clinically relevant concentrations of metronidazole, tigecycline, azithromycin and clindamycin but not ampicillin or sulfamethoxazole induce apoptosis of human primary neuron cells and lines. Notably, tigecycline, azithromycin and clindamycin cause neuron cell oxidative damage whereas metronidazole has no effect on reactive oxygen species (ROS) production, suggesting that metronidazole induces neuron death via ROS-independent mechanism. Tigecycline, azithromycin and clindamycin induce mitochondrial dysfunctions via targeting different mitochondrial respiratory complexes, leading to mitochondrial membrane potential disruption and energy crisis. The deleterious effects of antibiotics are reversed by pretreatment of neuron cells with antioxidant. Our work highlights the different influences of antibiotics on mitochondrial dysfunction, oxidative damage and cytotoxicity in neuron cells. We also provide a strategy to prevent the neurotoxicity.
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Affiliation(s)
- Yao Xiao
- Department of Neurology, Wuhan Fourth Hospital, Puai Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ting Xiong
- Department of Neurology, Hubei Provincial Hospital of Integrated Chinese and Western Medicine, Wuhan, China
| | - Xiangping Meng
- Department of Integrated Medicine, Wuhan Fourth Hospital, Puai Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Danfang Yu
- Department of Neurology, Hubei Provincial Hospital of Integrated Chinese and Western Medicine, Wuhan, China
| | - Zheng Xiao
- Department of Emergency Medicine, Wuhan Fourth Hospital, Puai Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Lin Song
- Department of Neurology, Hubei Provincial Hospital of Integrated Chinese and Western Medicine, Wuhan, China
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Lin S, Zhang C, Ye S. Preliminary experience of tigecycline treatment for infection in children with hematologic malignancies. Int J Clin Pharm 2018; 40:1030-1036. [PMID: 30051224 DOI: 10.1007/s11096-018-0690-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 07/05/2018] [Indexed: 11/27/2022]
Abstract
Background Severe infection is life-threatening in children with hematologic malignancies and its treatment is challenging because of an increasing number of multidrug-resistant pathogens. Tigecycline has an expanded antibacterial activity spectrum; some successful cases of tigecycline treatment have been reported in the literature. Objective To examine the efficacy and safety of tigecycline in children. Setting Department of hematologic malignancies in a tertiary hospital. Method A retrospective chart review from May 1, 2012 to May 1, 2017. The patients were identified by the hospital information system and a custom-made Microsoft Excel 2007 database of patients was created to record demographic and medical data. Main outcome measure Efficacy and safety of tigecycline use in severe infection children with hematologic malignancies. Results Thirty-seven patients were enrolled and the predominant diagnosis was acute lymphoblastic leukemia. The median duration of tigecycline therapy was 9 days. Most prescriptions were empirical. Eighteen patients received a maintenance dose of 2 mg/kg q12 h, without a loading dose. Sulperazone was the most frequently prescribed concomitant drug. At the end of tigecycline therapy, improvement was observed in 48.7% of cases. After treatment, interleukin-10 levels notably decreased. The only reported adverse event was a case of tooth discoloration. Conclusion Tigecycline can be used as salvage therapy in children with hematologic malignancy and seems tolerable. Prospective controlled studies are required to definitively evaluate the efficacy and safety of tigecycline in children.
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Affiliation(s)
- Shupeng Lin
- Division of Hematology-Oncology, Children's Hospital Zhejiang University School of Medicine, No. 57, Zhugan Road, Hangzhou, 310003, China
| | - Chenmei Zhang
- Department of Pediatric Intensive Care Unit, Children's Hospital Zhejiang University School of Medicine, No. 3333, Binsheng Road, Hangzhou, 310052, China
| | - Sheng Ye
- Department of Pediatric Intensive Care Unit, Children's Hospital Zhejiang University School of Medicine, No. 3333, Binsheng Road, Hangzhou, 310052, China.
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Sakarya Y, Sakarya R, Ozcimen M, Goktas S, Ozcimen S, Alpfidan I, Ivacık IS, Erdogan E, Cetinkaya S, Bukus A. Ocular penetration of topically applied 1% tigecycline in a rabbit model. Int J Ophthalmol 2017; 10:679-683. [PMID: 28546920 DOI: 10.18240/ijo.2017.05.03] [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: 02/13/2016] [Accepted: 08/11/2016] [Indexed: 11/23/2022] Open
Abstract
AIM To evaluate ocular penetration of topically applied 1% tigecycline. METHODS Forty-two New Zealand White rabbits were divided into 3 groups. A 50 µL drop of 1% tigecycline was administered in group 1. In groups 2 and 3, the drop was administered every 15min for 60min (keratitis protocol). Aqueous humor samples in groups 1 and 2 were collected under general anesthesia at 15, 30, 45, 60, 120, and 180min after the last drop. All animals in group 3 were euthanatized. Cornea, vitreous and blood samples were collected 60 and 120min after the last drop. Tigecycline concentrations were measured using high performance liquid chromatography-mass spectrometry (LC-MS/MS). RESULTS The peak aqueous humor tigecycline concentration [mean 0.73±0.14 mg/L (SD) and 2.41±0.14 mg/L, respectively] occurred 45min after topical drug application in groups 1 and 2. Group 3 mean values in the cornea, and vitreous, were 3.27±0.50 µg/g, and 0.17±0.10 mg/L at 60min and 3.17±0.77 µg/g and 0.20±0.07 mg/L at 120min, respectively. Tigecycline serum concentrations were negligible. CONCLUSION Tigecycline levels in the aqueous humor in groups 1 and 2, and in the cornea in group 3 exceeded the minimum inhibitory concentrations of most gram-positive organisms that cause bacterial keratitis and endophthalmitis.
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Affiliation(s)
- Yasar Sakarya
- Department of Ophthalmology, Konya Training and Research Hospital, Konya 42090, Turkey
| | - Rabia Sakarya
- Department of Ophthalmology, Konya Training and Research Hospital, Konya 42090, Turkey
| | - Muammer Ozcimen
- Department of Ophthalmology, Konya Training and Research Hospital, Konya 42090, Turkey
| | - Sertan Goktas
- Department of Ophthalmology, Konya Training and Research Hospital, Konya 42090, Turkey
| | - Serap Ozcimen
- Department of Infectious Diseases and Clinical Microbiology, Konya State Hospital, Konya 42060, Turkey
| | - Ismail Alpfidan
- Department of Ophthalmology, Konya Training and Research Hospital, Konya 42090, Turkey
| | - Ismail Senol Ivacık
- Department of Ophthalmology, Konya Training and Research Hospital, Konya 42090, Turkey
| | - Erkan Erdogan
- Department of Ophthalmology, Konya Training and Research Hospital, Konya 42090, Turkey
| | - Servet Cetinkaya
- Department of Ophthalmology, Konya Kizilay Hospital, Konya 42200, Turkey
| | - Abdulkadir Bukus
- Department of Ophthalmology, Konya Training and Research Hospital, Konya 42090, Turkey
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Sun Q, Li W, Li H, Wang X, Wang Y, Niu X. Preparation, Characterization and Anti-Ulcer Efficacy of Sanguinarine Loaded Solid Lipid Nanoparticles. Pharmacology 2017; 100:14-24. [DOI: 10.1159/000454882] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 12/02/2016] [Indexed: 12/27/2022]
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Li W, Wang Y, Wang X, Zhang H, He Z, Zhi W, Liu F, Niu X. Gastroprotective effect of esculin on ethanol-induced gastric lesion in mice. Fundam Clin Pharmacol 2017; 31:174-184. [DOI: 10.1111/fcp.12255] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Revised: 10/17/2016] [Accepted: 11/17/2016] [Indexed: 11/29/2022]
Affiliation(s)
- Weifeng Li
- School of Pharmacy; Xi'an Jiaotong University; Xi'an 710061 China
| | - Yu Wang
- School of Pharmacy; Xi'an Jiaotong University; Xi'an 710061 China
| | - Xiumei Wang
- School of Pharmacy; Xi'an Jiaotong University; Xi'an 710061 China
| | - Hailin Zhang
- School of Pharmacy; Xi'an Jiaotong University; Xi'an 710061 China
| | - Zehong He
- School of Pharmacy; Xi'an Jiaotong University; Xi'an 710061 China
| | - Wenbing Zhi
- School of Pharmacy; Xi'an Jiaotong University; Xi'an 710061 China
| | - Fang Liu
- School of Pharmacy; Xi'an Jiaotong University; Xi'an 710061 China
| | - Xiaofeng Niu
- School of Pharmacy; Xi'an Jiaotong University; Xi'an 710061 China
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Jia X, Gu Z, Chen W, Jiao J. Tigecycline targets nonsmall cell lung cancer through inhibition of mitochondrial function. Fundam Clin Pharmacol 2016; 30:297-306. [PMID: 27009695 DOI: 10.1111/fcp.12199] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Revised: 02/28/2016] [Accepted: 03/18/2016] [Indexed: 12/18/2022]
Affiliation(s)
- Xuefeng Jia
- Department of Oncology; The First People's Hospital of Jining; No.6 Jiankang road Jining Shandong Province China
| | - Zhenfang Gu
- Department of Oncology; Affiliated Hospital of Jining Medical University; No.79 Guhuai road Jining Shandong Province China
| | - Wenming Chen
- Department of Oncology; The First People's Hospital of Jining; No.6 Jiankang road Jining Shandong Province China
| | - Junbo Jiao
- Department of Oncology; The First People's Hospital of Jining; No.6 Jiankang road Jining Shandong Province China
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Song JW, Seo CS, Kim TI, Moon OS, Won YS, Son HY, Son JK, Kwon HJ. Protective Effects of Manassantin A against Ethanol-Induced Gastric Injury in Rats. Biol Pharm Bull 2015; 39:221-9. [PMID: 26632199 DOI: 10.1248/bpb.b15-00642] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Manassantin A, a neolignan isolated from Saururus chinensis, is a major phytochemical compound that has various biological activities, including anti-inflammatory, neuroleptic, and human acyl-CoA : cholesterol acyltransferase (ACAT) inhibitory activities. In this study, we investigated the protective effects of manassantin A against ethanol-induced acute gastric injury in rats. Gastric injury was induced by intragastric administration of 5 mL/kg body weight of absolute ethanol to each rat. The positive control group and the manassantin A group were given oral doses of omeprazole (20 mg/kg) or manassantin A (15 mg/kg), respectively, 1 h prior to the administration of absolute ethanol. Our examinations revealed that manassantin A pretreatment reduced ethanol-induced hemorrhage, hyperemia, and epithelial cell loss in the gastric mucosa. Manassantin A pretreatment also attenuated the increased lipid peroxidation associated with ethanol-induced acute gastric lesions, increased the mucosal glutathione (GSH) content, and enhanced the activities of antioxidant enzymes. The levels of pro-inflammatory cytokines, tumor necrosis factor-α (TNF-α), interleukin (IL)-6, and IL-1β were clearly decreased in the manassantin A-pretreated group. In addition, manassantin A pretreatment enhanced the levels of cyclooxygenase (COX)-1, COX-2, and prostaglandin E2 (PGE2) and reduced the inducible nitric oxide synthase (iNOS) overproduction and nuclear factor kappa B (NF-κB) phosphorylation. Collectively, these results indicate that manassantin A protects the gastric mucosa from ethanol-induced acute gastric injury, and suggest that these protective effects might be associated with COX/PGE2 stimulation, inhibition of iNOS production and NF-κB activation, and improvements in the antioxidant and anti-inflammatory status.
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Affiliation(s)
- Ji-Won Song
- Department of Veterinary Pathology, College of Veterinary Medicine, Chungnam National University
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Tetracyclines downregulate the production of LPS-induced cytokines and chemokines in THP-1 cells via ERK, p38, and nuclear factor-κB signaling pathways. Biochem Biophys Rep 2015; 4:397-404. [PMID: 29124230 PMCID: PMC5669446 DOI: 10.1016/j.bbrep.2015.11.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 10/30/2015] [Accepted: 11/04/2015] [Indexed: 01/03/2023] Open
Abstract
Recent reports have shown that antibiotics such as macrolide, aminoglycoside, and tetracyclines have immunomodulatory effects in addition to essential antibiotic effects. These agents may have important effects on the regulation of cytokine and chemokine production. However, the precise mechanism is unknown. This time, we used Multi Plex to measure the production of cytokines and chemokines following tetracycline treatment of lipopolysaccharide (LPS)-induced THP-1 cells. The signaling pathways were investigated with Western blotting analysis. Three tetracyclines significantly suppressed the expression of cytokines and chemokines induced by LPS. Minocycline (50 μg/ml), tigecycline (50 μg/ml), or doxycycline (50 μg/ml) were added after treatment with LPS (10 μg/ml). Tumor necrosis factor-α was downregulated to 16%, 14%, and 8%, respectively, after 60 min compared to treatment with LPS without agents. Interleukin-8 was downregulated to 43%, 32%, and 26% at 60 min. Macrophage inflammatory protein (MIP)-1α was downregulated to 23%, 33%, and 16% at 120 min. MIP-1β was downregulated to 21%, 11%, and 2% at 120 min. Concerning about signaling pathways, the mechanisms of the three tetracyclines might not be the same. Although the three tetracyclines showed some differences in the time course, tetracyclines modulated phosphorylation of the NF-κB pathway, p38 and ERK1/2/MAPK pathways, resulting in inhibition of cytokine and chemokine production. In addition, SB203580 (p38 inhibitor) and U0126 (ERK1/2 inhibitor) significantly suppressed the expression of TNF-α and IL-8 in LPS-stimulated THP-1 cells. And further, the NF-κB inhibitor, BAY11-7082, almost completely suppressed LPS-induced these two cytokines production. Thus, more than one signaling pathway may be involved in tetracyclines downregulation of the expression of LPS-induced cytokines and chemokines in THP-1 cells. And among the three signaling pathways, NF-κB pathway might be the dominant pathway on tetracyclines modification the LPS-induced cytokines production in THP-1 cells. In general, minocycline and doxycycline suppressed the production of cytokines and chemokines in LPS-stimulated THP-1 cell lines via mainly the inhibition of phosphorylation of NF-κB pathways. Tigecycline has the same structure as the other tetracyclines, however, it showed the different properties of cytokine modulation in the experimental time course.
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Effects of Nogo-A Silencing on TNF-α and IL-6 Secretion and TH Downregulation in Lipopolysaccharide-Stimulated PC12 Cells. BIOMED RESEARCH INTERNATIONAL 2015; 2015:817914. [PMID: 26583134 PMCID: PMC4637059 DOI: 10.1155/2015/817914] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Accepted: 06/25/2015] [Indexed: 12/23/2022]
Abstract
Parkinson's disease (PD) is a common degenerative disease that lacks efficient treatment. Myelin-associated neurite outgrowth inhibitor A (Nogo-A) is relevant with inhibition of nerve regeneration and may play vital role in pathogenesis of PD. The study aimed to establish the shRNA expression plasmids of Nogo-A gene and explore the regulatory effects of Nogo-A silencing on the expression of inflammation factor tumor necrosis factor-alpha (TNF-alpha) and interleukin-6 (IL-6) as well as tyrosine hydroxylase (TH) in lipopolysaccharide- (LPS-) stimulated rat PC12 cells. The results showed that both mRNA and protein levels of Nogo-A in pGenesil-nogoA-shRNA group were downregulated. The viabilities of PC12 cells decreased with increase of LPS concentrations. LPS significantly increased the supernatant TNF-alpha and IL-6 concentrations and reduced TH protein expression in PC12 cells, while silencing Nogo-A could block these effects. These results suggested that LPS can activate PC12 cells to secrete inflammatory cytokines and lower the TH expression, which can be regulated by Nogo-A gene silencing. Nogo-A silencing might provide new ideas for PD treatment in the future.
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Niu X, Yao H, Li W, Mu Q, Li H, Wang Y, Zhang H. δ-Amyrone inhibits lipopolysaccharide-induced inflammatory cytokines and protects against endotoxic shock in mice. Chem Biol Interact 2015; 240:354-61. [DOI: 10.1016/j.cbi.2015.07.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2014] [Revised: 05/22/2015] [Accepted: 07/06/2015] [Indexed: 12/30/2022]
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Hung YP, Lee JC, Lin HJ, Liu HC, Wu YH, Tsai PJ, Ko WC. Doxycycline and Tigecycline: Two Friendly Drugs with a Low Association with Clostridium Difficile Infection. Antibiotics (Basel) 2015; 4:216-29. [PMID: 27025622 PMCID: PMC4790331 DOI: 10.3390/antibiotics4020216] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2015] [Revised: 04/25/2015] [Accepted: 06/15/2015] [Indexed: 12/29/2022] Open
Abstract
Clostridium difficile infection (CDI) is known to be associated with prior exposure to many classes of antibiotics. Standard therapy for CDI (i.e., metronidazole and vancomycin) is associated with high recurrence rates. Although tetracycline derivatives such as tetracycline, doxycycline or tigecycline are not the standard therapeutic choices for CDI, they may serve as an alternative or a component of combination therapy. Previous tetracycline or doxycycline usage had been shown to have less association with CDI development. Tigecycline, a broad-spectrum glycylcycline with potency against many gram-positive or gram-negative pathogens, had been successfully used to treat severe or refractory CDI. The in vitro susceptibility of C. difficile clinical isolates to tigecycline in many studies showed low minimal inhibitory concentrations. Tigecycline can suppress in vitro toxin production in both historical and hypervirulent C. difficile strains and reduce spore production in a dose-dependent manner. Tetracycline compounds such as doxycycline, minocycline, and tigecycline possess anti-inflammatory properties that are independent of their antibiotic activity and may contribute to their therapeutic effect for CDI. Although clinical data are limited, doxycycline is less likely to induce CDI, and tigecycline can be considered one of the therapeutic choices for severe or refractory CDI.
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Affiliation(s)
- Yuan-Pin Hung
- Department of Internal Medicine, Tainan Hospital, Ministry of Health and Welfare, Tainan 70043, Taiwan.
- Department of Internal Medicine, National Cheng Kung University Hospital, No. 138, Sheng Li Road, Tainan 70403, Taiwan.
- Graduate Institute of Clinical Medicine, National Health Research Institutes, Tainan 70403, Taiwan.
| | - Jen-Chieh Lee
- Department of Internal Medicine, National Cheng Kung University Hospital, No. 138, Sheng Li Road, Tainan 70403, Taiwan.
| | - Hsiao-Ju Lin
- Department of Internal Medicine, Tainan Hospital, Ministry of Health and Welfare, Tainan 70043, Taiwan.
- Department of Internal Medicine, National Cheng Kung University Hospital, No. 138, Sheng Li Road, Tainan 70403, Taiwan.
- Graduate Institute of Clinical Medicine, National Health Research Institutes, Tainan 70403, Taiwan.
| | - Hsiao-Chieh Liu
- Department of Internal Medicine, Tainan Hospital, Ministry of Health and Welfare, Tainan 70043, Taiwan.
- Department of Medical Laboratory Science and Biotechnology, National Cheng Kung University, Medical College, Tainan 70102, Taiwan.
| | - Yi-Hui Wu
- Department of Internal Medicine, E-da Hospital, Kaohsiung 82445, Taiwan.
| | - Pei-Jane Tsai
- Department of Medical Laboratory Science and Biotechnology, National Cheng Kung University, Medical College, Tainan 70102, Taiwan.
- Center of Infectious Disease and Signaling Research, National Cheng Kung University, Tainan 70102, Taiwan.
| | - Wen-Chien Ko
- Department of Internal Medicine, National Cheng Kung University Hospital, No. 138, Sheng Li Road, Tainan 70403, Taiwan.
- Department of Medicine, National Cheng Kung University, Medical College, Tainan 70102, Taiwan.
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Li W, Yao H, Niu X, Wang Y, Zhang H, Li H, Mu Q. Protective effect of δ-amyrone against ethanol-induced gastric ulcer in mice. Immunobiology 2015; 220:798-806. [DOI: 10.1016/j.imbio.2014.12.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 12/10/2014] [Accepted: 12/22/2014] [Indexed: 11/24/2022]
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Nikolaeva S, Bayunova L, Sokolova T, Vlasova Y, Bachteeva V, Avrova N, Parnova R. GM1 and GD1a gangliosides modulate toxic and inflammatory effects of E. coli lipopolysaccharide by preventing TLR4 translocation into lipid rafts. Biochim Biophys Acta Mol Cell Biol Lipids 2014; 1851:239-47. [PMID: 25499607 DOI: 10.1016/j.bbalip.2014.12.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 12/02/2014] [Accepted: 12/05/2014] [Indexed: 12/13/2022]
Abstract
Exogenous gangliosides are known to inhibit the effects of Escherichia coli lipopolysaccharide (LPS) in different cells exhibiting anti-inflammatory and immunosuppressive activities. The mechanisms underlying ganglioside action are not fully understood. Because LPS recognition and receptor complex formation occur in lipid rafts, and gangliosides play a key role in their maintenance, we hypothesize that protective effects of exogenous gangliosides would depend on inhibition of LPS signaling via prevention of TLR4 translocation into lipid rafts. The effect of GM1 and GD1a gangliosides on LPS-induced toxic and inflammatory reactions in PC12 cells, and in epithelial cells isolated from the frog urinary bladder, was studied. In PC12 cells, GD1a and GM1 significantly reduced the effect of LPS on the decrease of cell survival and on stimulation of reactive oxygen species production. In epithelial cells, gangliosides decreased LPS-stimulated iNOS expression, NO, and PGE2 production. Subcellular fractionation, in combination with immunoblotting, showed that pretreatment of cells with GM1, GD1a, or methyl-β-cyclodextrin, completely eliminated the effect of LPS on translocation of TLR4 into lipid rafts. The results are consistent with the hypothesis that ganglioside-induced prevention of TLR4 translocation into lipid rafts could be a mechanism of protection against LPS in various cells.
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Affiliation(s)
- Svetlana Nikolaeva
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry of the Russian Academy of Sciences, 194223 Saint Petersburg, Russia
| | - Lubov Bayunova
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry of the Russian Academy of Sciences, 194223 Saint Petersburg, Russia
| | - Tatyana Sokolova
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry of the Russian Academy of Sciences, 194223 Saint Petersburg, Russia
| | - Yulia Vlasova
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry of the Russian Academy of Sciences, 194223 Saint Petersburg, Russia
| | - Vera Bachteeva
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry of the Russian Academy of Sciences, 194223 Saint Petersburg, Russia
| | - Natalia Avrova
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry of the Russian Academy of Sciences, 194223 Saint Petersburg, Russia
| | - Rimma Parnova
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry of the Russian Academy of Sciences, 194223 Saint Petersburg, Russia.
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Britt NS, Steed ME, Potter EM, Clough LA. Tigecycline for the Treatment of Severe and Severe Complicated Clostridium difficile Infection. Infect Dis Ther 2014; 3:321-31. [PMID: 25466443 PMCID: PMC4269622 DOI: 10.1007/s40121-014-0050-x] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Indexed: 01/01/2023] Open
Abstract
Introduction Clostridium difficile infection (CDI) is a common cause of nosocomial diarrhea. Metronidazole and vancomycin are the primary treatment options for CDI, but increasing rates of antimicrobial resistance and severe, refractory disease have prompted the need for alternative agents. Tigecycline has previously demonstrated favorable in vitro activity against C. difficile isolates, but clinical data on its use in the treatment of CDI are severely lacking. The objective of this study was to describe our experience using tigecycline in the treatment of severe and severe complicated CDI. Methods This was a retrospective case series of hospitalized patients with severe and severe complicated CDI who were treated with tigecycline. Disease severity assessments were determined according to current practice guidelines. Diagnosis of toxigenic CDI was confirmed by polymerase chain reaction and patients were excluded if they received tigecycline for <48 h. Data were collected by review of the electronic medical record. The primary outcome was clinical cure. Secondary outcomes were sustained response, hospital mortality, and 28-day all-cause mortality. Results A total of 7 cases of severe and complicated CDI were reviewed. Intravenous tigecycline administered as a 100-mg loading dose followed by 50 mg twice daily resulted in clinical cure in 85.7% (n = 6/7) of cases. The majority of patients (n = 4/5) were treated with the novel triple therapy combination of tigecycline, vancomycin, and metronidazole and resulted in clinical cure in 80% (n = 4/5) cases. Sustained response at 28 days was 100% among evaluable cases (n = 5/5). Hospital mortality did not occur in any patients, and 28-day all-cause mortality was 28.6% (n = 2/7). Conclusion Tigecycline appears to be a reasonable addition to the therapeutic regimen in the treatment of severe or complicated CDI, including cases that are refractory to standard therapy. A prospective clinical trial confirming these observational findings is warranted. Electronic supplementary material The online version of this article (doi:10.1007/s40121-014-0050-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Nicholas S Britt
- Department of Pharmacy Practice, University of Kansas School of Pharmacy, 3901 Rainbow Boulevard, MS 4047, Kansas City, KS, USA. .,Department of Preventive Medicine and Public Health, University of Kansas School of Medicine, Kansas City, KS, USA. .,Pharmacy Service, Dwight D. Eisenhower Veterans Affairs Medical Center, Leavenworth, KS, USA.
| | - Molly E Steed
- Department of Pharmacy Practice, University of Kansas School of Pharmacy, 3901 Rainbow Boulevard, MS 4047, Kansas City, KS, USA
| | - Emily M Potter
- Pharmacy Service, Dwight D. Eisenhower Veterans Affairs Medical Center, Leavenworth, KS, USA
| | - Lisa A Clough
- Division of Infectious Diseases, Department of Medicine, University of Kansas School of Medicine, Kansas City, KS, USA
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Ko SY, Kim DH, Lee TH. Effect of Glycyrrhizae Radix Water Extract on the depression induced by LPS in Rats. ACTA ACUST UNITED AC 2014. [DOI: 10.6116/kjh.2014.29.5.9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Protective effect of tetrahydrocoptisine against ethanol-induced gastric ulcer in mice. Toxicol Appl Pharmacol 2013; 272:21-9. [DOI: 10.1016/j.taap.2013.05.035] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 05/21/2013] [Accepted: 05/29/2013] [Indexed: 01/12/2023]
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