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James S, Daffy J, Cook J, Samiric T. Short-Term Exposure to Ciprofloxacin Reduces Proteoglycan Loss in Tendon Explants. Genes (Basel) 2022; 13:genes13122210. [PMID: 36553476 PMCID: PMC9777606 DOI: 10.3390/genes13122210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 11/22/2022] [Accepted: 11/24/2022] [Indexed: 11/29/2022] Open
Abstract
Fluoroquinolone antibiotics are associated with increased risk of tendinopathy and tendon rupture, which can occur well after cessation of treatment. We have previously reported that the fluoroquinolone ciprofloxacin (CPX) reduced proteoglycan synthesis in equine tendon explants. This study aimed to determine the effects of CPX on proteoglycan catabolism and whether any observed effects are reversible. Equine superficial digital flexor tendon explant cultures were treated for 4 days with 1, 10, 100 or 300 µg/mL CPX followed by 8 days without CPX. The loss of [35S]-labelled proteoglycans and chemical pool of aggrecan and versican was studied as well as the gene expression levels of matrix-degrading enzymes responsible for proteoglycan catabolism. CPX suppressed [35S]-labelled proteoglycan and total aggrecan loss from the explants, although not in a dose-dependent manner, which coincided with downregulation of mRNA expression of MMP-9, -13, ADAMTS-4, -5. The suppressed loss of proteoglycans was reversed upon removal of the fluoroquinolone with concurrent recovery of MMP and ADAMTS mRNA expression, and downregulated TIMP-2 and upregulated TIMP-1 expression. No changes in MMP-3 expression by CPX was observed at any stage. These findings suggest that CPX suppresses proteoglycan catabolism in tendon, and this is partially attributable to downregulation of matrix-degrading enzymes.
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Affiliation(s)
- Stuart James
- Department of Microbiology, Anatomy, Physiology and Pharmacology, La Trobe University, Melbourne, VIC 3086, Australia
| | - John Daffy
- Department of Infectious Diseases, St Vincent’s Hospital, Melbourne, VIC 3065, Australia
| | - Jill Cook
- Sports and Exercise Medicine Research Centre, La Trobe University, Melbourne, VIC 3086, Australia
| | - Tom Samiric
- Department of Microbiology, Anatomy, Physiology and Pharmacology, La Trobe University, Melbourne, VIC 3086, Australia
- Correspondence:
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Li S, Chen Z, Huang L, Liu Z, Shi Y, Zhang M, Li H, Zeng L, Ni J, Zhu Y, Jia ZJ, Cheng G, Zhang L. Safety of Quinolones in Children: A Systematic Review and Meta-Analysis. Paediatr Drugs 2022; 24:447-464. [PMID: 35771411 DOI: 10.1007/s40272-022-00513-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/25/2022] [Indexed: 01/01/2023]
Abstract
BACKGROUND The results of animal experiments show that quinolone antibacterial drugs may permanently damage the soft tissues of the weight-bearing joints of young animals. Out of safety concerns, using quinolones in children has always been controversial. OBJECTIVE The aim of this study was to assess the risk of using quinolones in children and provide evidence for clinicians to support decision making. DATA SOURCES The MEDLINE (Ovid), EMBASE, Cochrane Central Register of Controlled Trials (CENTRAL), International Pharmaceutical Abstracts (Ovid), CINAHL, CNKI, VIP, and WanFang Data databases were searched from inception to 8 September 2021. STUDY SELECTION All types of studies that reported the safety data of quinolones in children, including clinical trials and observational studies. DATA EXTRACTION Data extraction and cross-checking were completed by two independent reviewers using a pilot-tested standardized data extraction form. RESULTS The overall incidence rate of adverse drug events (ADEs) in children using systemic quinolones was 5.39% and the most common ADEs were gastrointestinal reactions (incidence rate, 2.02%). Quinolone-induced musculoskeletal ADEs in children were uncommon (0.76%). Meta-analysis results showed that the risk of musculoskeletal ADEs in children using quinolones was higher than children in the control group (51 studies; rate ratio [RR] 2.03, 95% confidence interval [CI] 1.82-2.26; p < 0.001; I2 = 18.6%; moderate-quality evidence). However, the subgroup analysis results showed that differences might only be observed in children who were followed up for 2 months to 1 year (2-6 months: RR 2.56, 95% CI 2.26-2.89; 7 months to 1 year: RR 1.35, 95% CI 0.98-1.86). Moreover, children (adolescents) aged between 13 and 18 years might be sensitive to the musculoskeletal toxicity of quinolones (RR 2.69, 95% CI 2.37-3.05; moderate-quality evidence) and the risk of levofloxacin-induced musculoskeletal ADEs might be higher (RR 1.33, 95% CI 1.00-1.77; low-quality evidence). CONCLUSIONS Although the existing evidence shows that quinolone-induced musculoskeletal ADEs seem to be only short-term and reversible, and no serious skeletal and muscular system damage cases have been reported in children, quinolones should be avoided unless necessary in children because the incidence rate of quinolone-related ADEs is not low and they are broad-spectrum antibiotics that will induce the emergence of resistant strains if used frequently.
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Affiliation(s)
- Siyu Li
- Department of Pharmacy, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.,Evidence-Based Pharmacy Center, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.,Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, Chengdu, 610041, China.,West China School of Medicine, Sichuan University, Chengdu, 610041, China
| | - Zhe Chen
- Department of Pharmacy, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.,Evidence-Based Pharmacy Center, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.,Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, Chengdu, 610041, China
| | - Liang Huang
- Department of Pharmacy, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.,Evidence-Based Pharmacy Center, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.,Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, Chengdu, 610041, China
| | - Zheng Liu
- Department of Pharmacy, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.,Evidence-Based Pharmacy Center, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.,Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, Chengdu, 610041, China.,West China School of Medicine, Sichuan University, Chengdu, 610041, China
| | - Yuqing Shi
- Department of Pharmacy, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.,Evidence-Based Pharmacy Center, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.,Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, Chengdu, 610041, China.,West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Miao Zhang
- Department of Pharmacy, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.,Evidence-Based Pharmacy Center, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.,Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, Chengdu, 610041, China.,West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Hailong Li
- Department of Pharmacy, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.,Evidence-Based Pharmacy Center, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.,Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, Chengdu, 610041, China
| | - Linan Zeng
- Department of Pharmacy, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.,Evidence-Based Pharmacy Center, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.,Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, Chengdu, 610041, China
| | - Jiaqi Ni
- Department of Pharmacy, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.,Evidence-Based Pharmacy Center, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.,West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Yu Zhu
- Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu, 610041, China
| | - Zhi-Jun Jia
- Department of Pharmacy, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.,Evidence-Based Pharmacy Center, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.,Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, Chengdu, 610041, China.,West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Guo Cheng
- Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, Chengdu, 610041, China.,Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.,Laboratory of Molecular Translational Medicine, Center for Translational Medicine, Sichuan University, Chengdu, 610041, China
| | - Lingli Zhang
- Department of Pharmacy, West China Second University Hospital, Sichuan University, Chengdu, 610041, China. .,Evidence-Based Pharmacy Center, West China Second University Hospital, Sichuan University, Chengdu, 610041, China. .,Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, Chengdu, 610041, China.
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3
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Li Q, Ding Y, Gao Y, Zhang F, Zhu H, Ding M. Effects of TNFR1 gene silencing on early apoptosis of marbofloxacin-treated chondrocytes from juvenile dogs. Toxicology 2019; 422:53-59. [PMID: 31005593 DOI: 10.1016/j.tox.2019.04.006] [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: 10/09/2018] [Revised: 03/27/2019] [Accepted: 04/16/2019] [Indexed: 11/26/2022]
Abstract
Quinolones (QNs)-induced cartilaginous lesions in juvenile animals by chondrocyte apoptosis is an important toxic effect, which results in the restriction of their use in pediatrics. However, limited data about QNs chondrotoxicity are available for evaluation of the potential toxicity in both animals and human cartilage. To explore whether tumor necrosis factor/its receptor (TNF/TNFR1) signaling pathway is involved in the early apoptosis of marbofloxacin-induced chondrocytes, canine juvenile chondrocytes were treated with 0, 20, 50 and 100 μg/mL marbofloxacin. Results showed that the apoptosis rates of the chondrocytes at 2, 8 and 24 h were significantly increased in a concentration- and time-dependent manner (P < 0.05). The mRNA levels of apoptosis-related factors in TNF/TNFR1 signaling pathways and the protein levels of TNFα and TNFR1 were increased in canine chondrocytes treated with 20-100 μg/mL marbofloxacin (P < 0.05) while TNFR1 gene silencing significantly decreased the chondrocyte apoptosis and inhibited the mRNA expression of TNF/TNFR1 downstream signaling molecules after 100 μg/mL marbofloxacin treatment at 8 h (P < 0.01). It was confirmed that activated TNF/TNFR1 signaling pathway may play a leading role in the early apoptosis of marbofloxacin-induced canine juvenile chondrocytes, which is helpful for clinical estimation or prevention of the risk of QNs.
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Affiliation(s)
- Qiao Li
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, China
| | - Yi Ding
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, China
| | - Yuan Gao
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, China
| | - Futao Zhang
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, China
| | - Hongmei Zhu
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, China
| | - Mingxing Ding
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, China.
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4
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Siengdee P, Pradit W, Chomdej S, Nganvongpanit K. Determination of two fluoroquinolones and their combinations with hyaluronan effect in in vitro canine cartilage explants. PeerJ 2019; 7:e6553. [PMID: 30881764 PMCID: PMC6419719 DOI: 10.7717/peerj.6553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 02/02/2019] [Indexed: 11/29/2022] Open
Abstract
Background Previous studies reported the effect of enrofloxacin (Enro) and marbofloxacin (Mar) on cell death and alteration of the key genes involved in catabolic and anabolic processes and demonstrated the beneficial effects of hyaluronan (HA) combined with fluoroquinolones (FQs) on primary canine chondrocytes. This study further determines the effects of these treatments on canine cartilage explants in both normal and interleukin-1 beta (IL-1β)-stimulated conditions. Methods We examined sulfate glycosaminoglycan (s-GAG) release, uronic acid (UA) content, and safranin-O staining, as well as the expression patterns of inflammatory, extracellular matrix (ECM) component and enzymes. Results Enro treatment alone effectively stimulated proteoglycan anabolism by increasing UA content and glycosaminoglycans (GAGs) in normal and pre-IL-1β-stimulated explant, whereas Mar showed opposite results. The combination of HA and FQs increased s-GAG release and UA content in normal explants in addition to effective down-regulated expression of MMP3. HA reduced the adverse effects of Mar by enhancing UA and GAG contents in both normal and pre-IL-1β-explants. Moreover, HA effectively induced HAS1and ACANup-regulation and reduced MMP9, TNF, PTGS2,and NFKB1 expression for a long term. Discussion Our results suggest the direct effects of Enro and Mar may selectively stimulate the conditioned explants to express MMP-codinggenes and promote gene expression involved in matrix production, pro-inflammatory cytokines, and cell degradation in different directions. HA successfully reduced the adverse effects of FQs by enhancing s-GAG and UA contents and down-regulated expression of MMPs.
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Affiliation(s)
- Puntita Siengdee
- Animal Bone and Joint Research Laboratory, Department of Veterinary Biosciences and Public Health, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai, Thailand.,Excellence Center in Veterinary Bioscience, Chiang Mai University, Chiang Mai, Thailand
| | - Waranee Pradit
- Science and Technology Research Institute, Chiang Mai University, Chiang Mai, Thailand
| | - Siriwadee Chomdej
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand
| | - Korakot Nganvongpanit
- Animal Bone and Joint Research Laboratory, Department of Veterinary Biosciences and Public Health, Faculty of Veterinary Medicine, Chiang Mai University, Chiang Mai, Thailand.,Excellence Center in Veterinary Bioscience, Chiang Mai University, Chiang Mai, Thailand
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5
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Abstract
Fluoroquinolones (FQ) are powerful broad-spectrum antibiotics whose side effects include renal damage and, strangely, tendinopathies. The pathological mechanisms underlying these toxicities are poorly understood. Here, we show that the FQ drugs norfloxacin, ciprofloxacin, and enrofloxacin are powerful iron chelators comparable with deferoxamine, a clinically useful iron-chelating agent. We show that iron chelation by FQ leads to epigenetic effects through inhibition of α-ketoglutarate-dependent dioxygenases that require iron as a co-factor. Three dioxygenases were examined in HEK293 cells treated with FQ. At sub-millimolar concentrations, these antibiotics inhibited jumonji domain histone demethylases, TET DNA demethylases, and collagen prolyl 4-hydroxylases, leading to accumulation of methylated histones and DNA and inhibition of proline hydroxylation in collagen, respectively. These effects may explain FQ-induced nephrotoxicity and tendinopathy. By the same reasoning, dioxygenase inhibition by FQ was predicted to stabilize transcription factor HIF-1α by inhibition of the oxygen-dependent hypoxia-inducible transcription factor prolyl hydroxylation. In dramatic contrast to this prediction, HIF-1α protein was eliminated by FQ treatment. We explored possible mechanisms for this unexpected effect and show that FQ inhibit HIF-1α mRNA translation. Thus, FQ antibiotics induce global epigenetic changes, inhibit collagen maturation, and block HIF-1α accumulation. We suggest that these mechanisms explain the classic renal toxicities and peculiar tendinopathies associated with FQ antibiotics.
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Affiliation(s)
- Sujan Badal
- From the Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota 55905
| | - Yeng F Her
- From the Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota 55905
| | - L James Maher
- From the Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota 55905
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6
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Weber D, Davies MJ, Grune T. Determination of protein carbonyls in plasma, cell extracts, tissue homogenates, isolated proteins: Focus on sample preparation and derivatization conditions. Redox Biol 2015; 5:367-380. [PMID: 26141921 PMCID: PMC4506980 DOI: 10.1016/j.redox.2015.06.005] [Citation(s) in RCA: 185] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 06/10/2015] [Accepted: 06/10/2015] [Indexed: 12/19/2022] Open
Abstract
Protein oxidation is involved in regulatory physiological events as well as in damage to tissues and is thought to play a key role in the pathophysiology of diseases and in the aging process. Protein-bound carbonyls represent a marker of global protein oxidation, as they are generated by multiple different reactive oxygen species in blood, tissues and cells. Sample preparation and stabilization are key steps in the accurate quantification of oxidation-related products and examination of physiological/pathological processes. This review therefore focuses on the sample preparation processes used in the most relevant methods to detect protein carbonyls after derivatization with 2,4-dinitrophenylhydrazine with an emphasis on measurement in plasma, cells, organ homogenates, isolated proteins and organelles. Sample preparation, derivatization conditions and protein handling are presented for the spectrophotometric and HPLC method as well as for immunoblotting and ELISA. An extensive overview covering these methods in previously published articles is given for researchers who plan to measure protein carbonyls in different samples.
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Affiliation(s)
- Daniela Weber
- Department of Molecular Toxicology, German Institute of Human Nutrition, Potsdam-Rehbruecke, Germany.
| | - Michael J Davies
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Copenhagen, Denmark
| | - Tilman Grune
- Department of Molecular Toxicology, German Institute of Human Nutrition, Potsdam-Rehbruecke, Germany
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7
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Arunvikram K, Mohanty I, Sardar KK, Palai S, Sahoo G, Patra RC. Adverse drug reaction and toxicity caused by commonly used antimicrobials in canine practice. Vet World 2014. [DOI: 10.14202/vetworld.2014.299-305] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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8
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Zhang FT, Ding Y, Shah Z, Xing D, Gao Y, Liu DM, Ding MX. TNF/TNFR₁ pathway and endoplasmic reticulum stress are involved in ofloxacin-induced apoptosis of juvenile canine chondrocytes. Toxicol Appl Pharmacol 2014; 276:121-8. [PMID: 24582689 DOI: 10.1016/j.taap.2014.02.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Revised: 01/09/2014] [Accepted: 02/04/2014] [Indexed: 01/06/2023]
Abstract
BACKGROUND AND PURPOSE Quinolones cause obvious cartilaginous lesions in juvenile animals by chondrocyte apoptosis, which results in the restriction of their use in pediatric and adolescent patients. Studies showed that chondrocytes can be induced to produce TNFα, and the cisternae of the endoplasmic reticulum in quinolone-treated chondrocytes become dilated. We investigated whether TNF/TNFR₁ pathway and endoplasmic reticulum stress (ERs) are involved in ofloxacin (a typical quinolone)-induced apoptosis of juvenile canine chondrocytes. EXPERIMENTAL APPROACH Canine juvenile chondrocytes were treated with ofloxacin. Cell survival and apoptosis rates were determined with MTT method and flow cytometry, respectively. The gene expression levels of the related signaling molecules (TNFα, TNFR₁, TRADD, FADD and caspase-8) in death receptor pathways and main apoptosis-related molecules (calpain, caspase-12, GADD153 and GRP78) in ERs were measured by qRT-PCR. The gene expression of TNFR₁ was suppressed with its siRNA. The protein levels of TNFα, TNFR₁ and caspase-12 were assayed using Western blotting. KEY RESULTS The survival rates decreased while apoptosis rates increased after the chondrocytes were treated with ofloxacin. The mRNA levels of the measured apoptosis-related molecules in death receptor pathways and ERs, and the protein levels of TNFα, TNFR₁ and caspase-12 increased after the chondrocytes were exposed to ofloxacin. The downregulated mRNA expressions of TNFR₁, Caspase-8 and TRADD, and the decreased apoptosis rates of the ofloxacin-treated chondrocytes occurred after TNFR₁-siRNA interference. CONCLUSIONS AND IMPLICATIONS Ofloxacin-induced chondrocyte apoptosis in a time- and concentration-dependent fashion. TNF/TNFR₁ pathway and ERs are involved in ofloxacin-induced apoptosis of juvenile canine chondrocytes in the early stage.
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Affiliation(s)
| | - Yi Ding
- Huazhong Agricultural University, PR China
| | - Zahir Shah
- Huazhong Agricultural University, PR China
| | - Dan Xing
- Huazhong Agricultural University, PR China
| | - Yuan Gao
- Huazhong Agricultural University, PR China
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Adverse effects of antimicrobials via predictable or idiosyncratic inhibition of host mitochondrial components. Antimicrob Agents Chemother 2012; 56:4046-51. [PMID: 22615289 DOI: 10.1128/aac.00678-12] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
This minireview explores mitochondria as a site for antibiotic-host interactions that lead to pathophysiologic responses manifested as nonantibacterial side effects. Mitochondrion-based side effects are possibly related to the notion that these organelles are archaic bacterial ancestors or commandeered remnants that have co-evolved in eukaryotic cells; thus, this minireview focuses on mitochondrial damage that may be analogous to the antibacterial effects of the drugs. Special attention is devoted to aminoglycosides, chloramphenicol, and fluoroquinolones and their respective single side effects related to mitochondrial disturbances. Linezolid/oxazolidinone multisystemic toxicity is also discussed. Aminoglycosides and oxazolidinones are inhibitors of bacterial ribosomes, and some of their side effects appear to be based on direct inhibition of mitochondrial ribosomes. Chloramphenicol and fluoroquinolones target bacterial ribosomes and gyrases/topoisomerases, respectively, both of which are present in mitochondria. However, the side effects of chloramphenicol and the fluoroquinolones appear to be based on idiosyncratic damage to host mitochondria. Nonetheless, it appears that mitochondrion-associated side effects are a potential aspect of antibiotics whose targets are shared by prokaryotes and mitochondria-an important consideration for future drug design.
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Khadra A, Pinelli E, Lacroix MZ, Bousquet-Melou A, Hamdi H, Merlina G, Guiresse M, Hafidi M. Assessment of the genotoxicity of quinolone and fluoroquinolones contaminated soil with the Vicia faba micronucleus test. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2012; 76:187-192. [PMID: 22047769 DOI: 10.1016/j.ecoenv.2011.10.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2011] [Revised: 10/07/2011] [Accepted: 10/08/2011] [Indexed: 05/31/2023]
Abstract
The genotoxicity of quinolone and fluroquinolones was assessed using the micronucleus (MN) test on Vicia faba roots by direct contact exposure to a solid matrix. Plants were exposed to quinolones (nalidixic acid) and fluoroquinolones (ciprofloxacin and enrofloxacin) alone or mixed with artificially contaminated soils. Four different concentrations of each of these antibiotics were tested (0.01, 0.1, 1 and 10 mg/Kg) for nalidixic acid and (0.005, 0.05, 0.5 and 5 mg/Kg) for ciprofloxacin and enrofloxacin. These antibiotics were also used in mixture. Exposure of Vicia faba plants to each antibiotic at the highest two concentrations showed significant MN induction. The lowest two concentrations had no significant genotoxic effect. The mixture of the three compounds induced a significant MN induction whatever the mixture tested, from 0.02 to 20 mg/Kg. The results indicated that a similar genotoxic effect was obtained with the mixture at 0.2 mg/Kg in comparison with each molecule alone at 5-10 mg/Kg. Data revealed a clear synergism of these molecules on Vicia faba genotoxicity.
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Affiliation(s)
- A Khadra
- Laboratoire d'Ecologie et Environnement-Unité Associée au CNRST, URAC 32, Unité Associée au CNERS, Département de Biologie, Faculté des Sciences Semlalia, Université Cadi Ayyad, BP 2390, Marrakech, Maroc
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11
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Talla V, Veerareddy PR. Oxidative stress induced by fluoroquinolones on treatment for complicated urinary tract infections in Indian patients. J Young Pharm 2011; 3:304-9. [PMID: 22224037 PMCID: PMC3249743 DOI: 10.4103/0975-1483.90242] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
The aim of the study is to examine the oxidative stress in patients on fluoroquinolones (ciprofloxacin, levofloxacin, gatifloxacin) therapy for complicated urinary tract infections and to correlate with plasma concentrations at different time intervals. Superoxide dismutase (SOD), glutathione, plasma antioxidant status and lipid peroxides were evaluated in 52 patients on different dosage regimens up to 5 days. There is significant and gradual elevation of lipid peroxide levels in patients on ciprofloxacin (3.6 ± 0.34 nmol/ml to 6.2 ± 0.94 nmol/ml) and levofloxacin (3.5 ± 0.84 nmol/ml to 5.1 ± 0.28 nmol/ml) dosage regimen but not with gatifloxacin (3.5 ± 0.84 nmol/ml to 3.74 ± 0.17 nmol.ml). There was substantial depletion in both SOD and glutathione levels particularly with ciprofloxacin. On the 5(th) day of treatment, plasma antioxidant status decreased by 77.6% %, 50.5%, 7.56% for ciprofloxacin, levofloxacin and gatifloxacin respectively. In conclusion ciprofloxacin and levofloxacin induce more reactive oxygen species that lead to cell damage than gatifloxacin irrespective of their concentrations in patient population.
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Affiliation(s)
- V Talla
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - PR Veerareddy
- Department of Pharmaceutics, St Peters’ Institute of Pharmaceutical Sciences, Warangal, Andhra Pradesh, India
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12
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Abstract
OBJECTIVE To determine the safety of ciprofloxacin in paediatric patients in relation to arthropathy, any other adverse events (AEs) and drug interactions. METHODS A systematic search of MEDLINE, EMBASE, CINAHL, CENTRAL and bibliographies of relevant articles was carried out for all published articles, regardless of design, that involved the use of ciprofloxacin in any paediatric age group ≤ 17 years. Only articles that reported on safety were included. RESULTS 105 articles met the inclusion criteria and involved 16 184 paediatric patients. There were 1065 reported AEs (risk 7%, 95% CI 3.2% to 14.0%). The most frequent AEs were musculoskeletal AEs, abnormal liver function tests, nausea, changes in white blood cell counts and vomiting. There were six drug interactions (with aminophylline (4) and methotrexate (2)). The only drug related death occurred in a neonate who had an anaphylactic reaction. 258 musculoskeletal events occurred in 232 paediatric patients (risk 1.6%, 95% CI 0.9% to 2.6%). Arthralgia accounted for 50% of these. The age of occurrence of arthropathy ranged from 7 months to 17 years (median 10 years). All cases of arthropathy resolved or improved with management. One prospective controlled study estimated the risk of arthropathy as 9.3 (OR 95% CI 1.2 to 195). Pooled safety data of controlled trials in this review estimated the risk of arthropathy as 1.57 (OR 95% CI 1.26 to 1.97). CONCLUSION Musculoskeletal AEs occur due to ciprofloxacin use. However, these musculoskeletal events are reversible with management. It is recommended that further prospective controlled studies should be carried out to evaluate the safety of ciprofloxacin, with particular focus on the risk of arthropathy.
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Affiliation(s)
- Abiodun Adefurin
- Academic Division of Child Health, University of Nottingham, Derbyshire Children's Hospital, Derby, UK
| | - Helen Sammons
- Academic Division of Child Health, University of Nottingham, Derbyshire Children's Hospital, Derby, UK
| | - Evelyne Jacqz-Aigrain
- Department of Pediatric Pharmacology and Pharmacogenetics, Clinical Investigation Center (CIC), 9202 INSERM, Hôpital Robert Debré, Paris, France
| | - Imti Choonara
- Academic Division of Child Health, University of Nottingham, Derbyshire Children's Hospital, Derby, UK
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Li Q, Peng S, Sheng Z, Wang Y. Ofloxacin induces oxidative damage to joint chondrocytes of juvenile rabbits: Excessive production of reactive oxygen species, lipid peroxidation and DNA damage. Eur J Pharmacol 2010; 626:146-53. [DOI: 10.1016/j.ejphar.2009.09.044] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2008] [Revised: 09/15/2009] [Accepted: 09/28/2009] [Indexed: 11/30/2022]
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Lemus JA, Blanco G, Arroyo B, Martínez F, Grande J. Fatal embryo chondral damage associated with fluoroquinolones in eggs of threatened avian scavengers. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2009; 157:2421-2427. [PMID: 19321243 DOI: 10.1016/j.envpol.2009.03.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2008] [Revised: 02/06/2009] [Accepted: 03/10/2009] [Indexed: 05/27/2023]
Abstract
Stabled livestock reared in housed conditions are often subjected to intensive treatments with veterinary drug, which residues may be present in livestock meat ingested by scavengers, but nothing is known about their presence in eggs of wild birds and their potential detrimental effects on breeding success. We searched for residues of veterinary drugs and other toxicants in infertile and embryonated unhatched eggs of griffon vultures (Gyps fulvus) and red kites (Milvus milvus), two threatened avian scavengers. Quinolones (ciprofloxacin and enrofloxacin) were found in most unhatched eggs of both scavenger species clearly associated with severe alterations in the development of embryo cartilage and bones that could preclude embryo movements and subsequently normal development, pre-hatch position and successful hatching. The detrimental effects on developing eggs of veterinary drugs from livestock operations may help to explain reduced breeding success of avian scavengers.
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Affiliation(s)
- J A Lemus
- Departamento de Ecología Evolutiva, Museo Nacional de Ciencias Naturales (CSIC), J. Gutiérrez Abascal 2, 28006 Madrid, Spain
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Thaver D, Zaidi AK, Critchley JA, Azmatullah A, Madni SA, Bhutta ZA. Fluoroquinolones for treating typhoid and paratyphoid fever (enteric fever). Cochrane Database Syst Rev 2008:CD004530. [PMID: 18843659 DOI: 10.1002/14651858.cd004530.pub3] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Fluoroquinolones are recommended as first-line therapy for typhoid and paratyphoid fever (enteric fever), but how they compare with other antibiotics and different fluoroquinolones is unclear. OBJECTIVES To evaluate fluoroquinolone antibiotics for treating enteric fever in children and adults compared with other antibiotics, different fluoroquinolones, and different durations of fluoroquinolone treatment. SEARCH STRATEGY In November 2007, we searched the Cochrane Infectious Diseases Group Specialized Register, CENTRAL (The Cochrane Library 2007, Issue 4), MEDLINE, EMBASE, LILACS, mRCT, conference proceedings, and reference lists. SELECTION CRITERIA Randomized controlled trials of fluoroquinolones in people with blood or bone marrow culture-confirmed enteric fever. DATA COLLECTION AND ANALYSIS Two authors independently assessed the trials' methodological quality and extracted data. We calculated odds ratios (OR) for dichotomous data with 95% confidence intervals (CI). We analysed trials with greater than 60% children separately from trials of mostly adults. MAIN RESULTS Of 38 included trials, 22 had unclear allocation concealment and 34 did not use blinding. Four trials included exclusively children, seven had both adults and children, and three studied outpatients. ADULTS Among primary outcomes (clinical failure, microbiological failure, and relapse), compared with chloramphenicol, fluoroquinolones were not statistically significantly different for clinical failure (594 participants) or microbiological failure (378 participants), but they reduced clinical relapse (OR 0.14, 95% CI 0.04 to 0.50; 467 participants, 6 trials). We detected no statistically significant difference versus co-trimoxazole (82 participants, 2 trials) or azithromycin (152 participants, 2 trials). Fluoroquinolones reduced clinical failure compared with ceftriaxone (OR 0.08, 95% CI 0.01 to 0.45; 120 participants, 3 trials), but not microbiological failure or relapse. Versus cefixime, fluoroquinolones reduced clinical failure (OR 0.05, 95% CI 0.01 to 0.24; 238 participants; 2 trials) and relapse (OR 0.18, 95% CI 0.03 to 0.91; 218 participants, 2 trials). CHILDREN In children with high proportions of nalidixic acid-resistant strains, older fluoroquinolones increased clinical failures compared with azithromycin (OR 2.67, 95% CI 1.16 to 6.11; 125 participants, 1 trial), with no differences using newer fluoroquinolones (285 participants, 1 trial). Fluoroquinolones and cefixime were not statistically significantly different (82 participants, 1 trial). Trials comparing different durations of fluoroquinolone treatment were not statistically significantly different (889 participants, 9 trials). Norfloxacin had more clinical failures than other fluoroquinolones (417 participants, 5 trials). AUTHORS' CONCLUSIONS Trials were small and methodological quality varied. In adults, fluoroquinolones may be better for reducing clinical relapse rates compared to chloramphenicol. Data are limited for other comparisons, particularly in children.
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Affiliation(s)
- Durrane Thaver
- Department of Paediatrics & Child Health, Aga Khan University Hospital, Stadium Road, PO Box 3500, Karachi, Pakistan, 74800.
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Quinolone-induced arthropathy: an update focusing on new mechanistic and clinical data. Int J Antimicrob Agents 2008; 33:194-200. [PMID: 18835137 DOI: 10.1016/j.ijantimicag.2008.08.004] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2008] [Accepted: 08/11/2008] [Indexed: 11/23/2022]
Abstract
Quinolones possess favourable antibacterial and pharmacokinetic characteristics and are often used as anti-infective agents in adults. They are contraindicated in children and adolescents because they damage weight-bearing joints in juvenile animals. In addition, they possess a tendotoxic potential. Since ciprofloxacin has been used off-label for decades in children and adolescents, it is known today that no pronounced risks for arthropathies or tendinopathies exist in humans. Recently published clinical studies with gatifloxacin in children support this clinical experience. However, a low risk for joint disorders cannot be excluded and tendinopathies are a generally accepted rare adverse effect of quinolones at least in adults. Isolated case reports of arthralgia in children following quinolone therapy have been published and in studies with levofloxacin the incidence of musculoskeletal disorders was significantly greater in levofloxacin-treated patients than in control patients treated with comparator antibiotics. As a consequence, only life-threatening infections for which other antimicrobials cannot be used are possible indications for quinolones in children, for example the use of ciprofloxacin in cystic fibrosis patients with a bronchopulmonary exacerbation, chronic suppurative otitis media caused by Pseudomonas sp., complicated urinary tract infections and enteritis caused by invasive multidrug-resistant pathogens (e.g. Salmonella, Shigella).
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Rees MD, Kennett EC, Whitelock JM, Davies MJ. Oxidative damage to extracellular matrix and its role in human pathologies. Free Radic Biol Med 2008; 44:1973-2001. [PMID: 18423414 DOI: 10.1016/j.freeradbiomed.2008.03.016] [Citation(s) in RCA: 145] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2007] [Revised: 03/16/2008] [Accepted: 03/20/2008] [Indexed: 02/08/2023]
Abstract
The extracellular compartments of most biological tissues are significantly less well protected against oxidative damage than intracellular sites and there is considerable evidence for such compartments being subject to a greater oxidative stress and an altered redox balance. However, with some notable exceptions (e.g., plasma and lung lining fluid) oxidative damage within these compartments has been relatively neglected and is poorly understood. In particular information on the nature and consequences of damage to extracellular matrix is lacking despite the growing realization that changes in matrix structure can play a key role in the regulation of cellular adhesion, proliferation, migration, and cell signaling. Furthermore, the extracellular matrix is widely recognized as being a key site of cytokine and growth factor binding, and modification of matrix structure might be expected to alter such behavior. In this paper we review the potential sources of oxidative matrix damage, the changes that occur in matrix structure, and how this may affect cellular behavior. The role of such damage in the development and progression of inflammatory diseases is discussed.
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Affiliation(s)
- Martin D Rees
- The Heart Research Institute, 114 Pyrmont Bridge Rd, Camperdown, NSW 2050, Australia
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Affiliation(s)
- Michiyuki Kato
- Medicinal Safety Research Laboratories, DAIICHI SANKYO CO., LTD
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Pfister K, Mazur D, Vormann J, Stahlmann R. Diminished ciprofloxacin-induced chondrotoxicity by supplementation with magnesium and vitamin E in immature rats. Antimicrob Agents Chemother 2007; 51:1022-7. [PMID: 17210779 PMCID: PMC1803142 DOI: 10.1128/aac.01175-06] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Quinolone-induced chondrotoxicity in juvenile rats and multiple other species has been demonstrated previously. Identical damages can be induced in immature rats by feeding them a magnesium-deficient diet. The objective of the present study was to investigate whether, in reverse, oral supplementation with magnesium, vitamin E, or both can diminish the typical quinolone-induced arthropathy in juvenile Wistar rats. Four groups of 12 (6 male, 6 female) 24-day-old Wistar rats were each fed either normal feed (group A), a vitamin E-enriched diet (group B), a magnesium-enriched diet (group C), or a diet enriched with both vitamin E and magnesium (group D) for 10 days. All rats received two subcutaneous ciprofloxacin doses of 600 mg/kg of body weight on postnatal day 32. Two days later, the rats were sacrificed and cartilage samples from knee joints were examined under a light microscope for the presence of typical quinolone-induced joint cartilage lesions. In addition, magnesium, calcium, and vitamin E concentrations in cartilage and plasma were determined. In the samples from rats fed a normal diet (group A), 17 quinolone-induced joint cartilage lesions were observed. In groups fed an enriched diet, the incidence of specific lesions (n) was significantly lower: group B, n = 10 (41% reduction compared to the incidence for group A; P < 0.05); group C, n = 6 (65% reduction; P < 0.01); and group D, n = 3 (82% reduction; P < 0.01). In comparison to the standard diet, diets with magnesium and vitamin E supplementation resulted in significantly higher magnesium and vitamin E concentrations in plasma and articular cartilage. Supplementation with magnesium and vitamin E alone or in combination may relevantly diminish joint cartilage lesions induced by quinolones in immature rats, with an additive effect of combined supplementation. The data further support the proposed pathomechanism of quinolone-induced arthropathy and the crucial role of magnesium in immature joint cartilage.
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Affiliation(s)
- Kerstin Pfister
- Institut für Klinische Pharmakologie und Toxikologie, Charité CBF, Abt. Toxikologie, Garystrasse 5, 14195 Berlin, Germany
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Thaver D, Zaidi AK, Critchley J, Madni SA, Bhutta ZA. Fluoroquinolones for treating typhoid and paratyphoid fever (enteric fever). Cochrane Database Syst Rev 2005:CD004530. [PMID: 15846718 DOI: 10.1002/14651858.cd004530.pub2] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Fluoroquinolones are recommended as first-line therapy for typhoid and paratyphoid fever, but how they compare with other cheaper antibiotics and different fluoroquinolones is unclear. OBJECTIVES To evaluate fluoroquinolone antibiotics for treating enteric fever in children and adults compared with other antibiotics, different fluoroquinolones, and different treatment durations of the same fluoroquinolone. SEARCH STRATEGY We searched the Cochrane Infectious Diseases Group Specialized Register (August 2004), CENTRAL (The Cochrane Library Issue 3, 2004), MEDLINE (1966 to August 2004), EMBASE (1974 to August 2004), LILACS (1982 to August 2004), conference proceedings, reference lists, and contacted researchers. SELECTION CRITERIA Randomized controlled trials of fluoroquinolones in people with blood or bone marrow culture-confirmed enteric fever. DATA COLLECTION AND ANALYSIS Two reviewers independently assessed the methodological quality of trials and extracted data. We calculated the odds ratio (OR) for dichotomous data with 95% confidence intervals. We analysed norfloxacin separately. MAIN RESULTS Thirty-three trials met the inclusion criteria; 22 had unclear allocation concealment, and 29 were not blinded. Three trials exclusively included children, and two studied outpatients. The main analysis examined clinical failure, microbiological failure, and relapse. Compared with chloramphenicol, fluoroquinolones were not statistically significantly different for clinical (544 participants) or microbiological failure (378 participants) in adults; they reduced clinically diagnosed relapse in adults (OR 0.14, 0.04 to 0.50; 467 participants, 6 trials), but this was not statistically significant in participants with blood culture-confirmed relapse (121 participants, 2 trials). Compared with co-trimoxazole, we detected no statistically significant difference (82 participants, 2 trials). Among adults, fluoroquinolones reduced clinical failure compared with ceftriaxone (OR 0.08, 0.01 to 0.45; 120 participants, 3 trials), but showed no difference for microbiological failure or relapse. We detected no statistically significant difference between fluoroquinolones and cefixime (80 participants, 1 trial) or azithromycin (152 participants, 2 trials). In trials of hospitalized children, fluoroquinolones were not statistically significantly different from ceftriaxone (60 participants, 1 trial, involving norfloxacin) or cefixime (82 participants, 1 trial). Norfloxacin had more clinical failures than other fluoroquinolones (417 participants, 5 trials). Trials comparing different durations of fluoroquinolone treatment showed no statistically significant differences (693 participants, 8 trials). AUTHORS' CONCLUSIONS Many trials were small, and methodological quality varied widely. Although enteric fever most commonly affects children, trials in this group were particularly sparse. Insufficient data in all comparisons preclude any firm conclusions to be made regarding superiority of fluoroquinolones over first-line antibiotics in children and adults.
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Yoon JH, Brooks RL, Zhao JZ, Isaacs D, Halper J. The effects of enrofloxacin on decorin and glycosaminoglycans in avian tendon cell cultures. Arch Toxicol 2004; 78:599-608. [PMID: 15148565 DOI: 10.1007/s00204-004-0574-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2004] [Accepted: 03/16/2004] [Indexed: 11/26/2022]
Abstract
Tendonitis and tendon rupture have been reported to occur during or following therapy with fluoroquinolone antibiotics. Though the pathogenesis is unknown, several studies suggest that fluoroquinolone antibiotics alter proteoglycan content in soft tissues, including tendons, and thereby alter collagen fibrillogenesis. To better understand the mechanism of action of fluoroquinolones, we studied the effects of enrofloxacin, a widely used fluoroquinolone in veterinary medicine, on avian tendon cell cultures established from gastrocnemius tendons from 18-day-old chicken embryos. We found that cell proliferation was progressively inhibited with increasing concentrations of enrofloxacin. This was accompanied by changes in morphology, extracellular matrix content and collagen fibril formation as detected by electron microscopy. We also observed a 35% decrease in the content of total monosaccharides in enrofloxacin-treated cells. The ratio of individual monosaccharides was also altered in enrofloxacin-treated cells. Enrofloxacin also induced the synthesis of small amounts of keratan sulfate in tendon cells. Moreover we observed enrofloxacin-induced changes in glycosylation of decorin, the most abundant tendon proteoglycan, resulting in the emergence of multiple lower molecular bands that were identifiable as decorin after chondroitinase ABC and N-glycanase treatment of extracts from enrofloxacin-treated cells. Medium conditioned by enrofloxacin-treated cells contained less decorin than did medium conditioned by control cells. We hypothesize that enrofloxacin induces either changes in the number of N-linked oligosaccharides attached to the core protein of decorin or changes in decorin degradation process. In conclusion, our data suggest that enrofloxacin affects cell proliferation and extracellular matrix through changes in glycosylation.
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Affiliation(s)
- Jung Hae Yoon
- Department of Pathology, College of Veterinary Medicine, The University of Georgia, Athens, GA 30602, USA
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Simonin MA, Gegout-Pottie P, Minn A, Gillet P, Netter P, Terlain B. Pefloxacin-induced achilles tendon toxicity in rodents: biochemical changes in proteoglycan synthesis and oxidative damage to collagen. Antimicrob Agents Chemother 2000; 44:867-72. [PMID: 10722483 PMCID: PMC89784 DOI: 10.1128/aac.44.4.867-872.2000] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Despite a relatively low incidence of serious side effects, fluoroquinolones and the fluoroquinolone pefloxacin have been reported to occasionally promote tendinopathy that might result in the complication of spontaneous rupture of tendons. In the present study, we investigated in rodents the intrinsic deleterious effect of pefloxacin (400 mg/kg of body weight) on Achilles tendon proteoglycans and collagen. Proteoglycan synthesis was determined by measurement of in vivo and ex vivo radiosulfate incorporation in mice. Collagen oxidative modifications were measured by carbonyl derivative detection by Western blotting. An experimental model of tendinous ischemia (2 h) and reperfusion (3 days) was achieved in rats. Biphasic changes in proteoglycan synthesis were observed after a single administration of pefloxacin, consisting of an early inhibition followed by a repair-like phase. The depletion phase was accompanied by a marked decrease in the endogenous serum sulfate level and a concomitant increase in the level of sulfate excretion in urine. Studies of ex vivo proteoglycan synthesis confirmed the in vivo results that were obtained. The decrease in proteoglycan anabolism seemed to be a direct effect of pefloxacin on tissue metabolism rather than a consequence of the low concentration of sulfate. Pefloxacin treatment for several days induced oxidative damage of type I collagen, with the alterations being identical to those observed in the experimental tendinous ischemia and reperfusion model. Oxidative damage was prevented by coadministration of N-acetylcysteine (150 mg/kg) to the mice. These results provide the first experimental evidence of a pefloxacin-induced oxidative stress in the Achilles tendon that altered proteoglycan anabolism and oxidized collagen.
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Affiliation(s)
- M A Simonin
- Department of Pharmacology, UMR 7561, CNRS-Université Henri Poincaré-Nancy I "Physiopathologie et Pharmacologie Articulaires," Faculté de Médecine, Vandoeuvre-lès-Nancy, France
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