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Miao J, Yu J, Zhao X, Chen X, Zhu C, Cao X, Huang Y, Li B, Wu Y, Chen L, Wang X. Molecular imprinting-based triple-emission ratiometric fluorescence sensor with aggregation-induced emission effect for visual detection of doxycycline. J Hazard Mater 2024; 470:134218. [PMID: 38581878 DOI: 10.1016/j.jhazmat.2024.134218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Revised: 03/20/2024] [Accepted: 04/03/2024] [Indexed: 04/08/2024]
Abstract
The development of high-performance sensors for doxycycline (DOX) detection is necessary because its residue accumulation will cause serious harm to human health and the environment. Here, a novel tri-emission ratiometric fluorescence sensor was proposed by using "post-mixing" strategy of different emissions fluorescence molecularly imprinted polymers with salicylamide as dummy template (DMIPs). BSA was chosen as assistant functional monomer, and also acted as sensitizers for the aggregation-induced emission (AIE) effect of DOX. The blue-emitting carbon dots and the red-emitting CdTe quantum dots were separately introduced into DMIPs as the response signals. Upon DOX recognition within 2 min, blue and red fluorescence of the tri-emission DMIPs sensor were quenched while green fluorescence of DOX was enhanced, resulting in a wide range of color variations observed over bluish violet-rosered-light pink-orange-yellow-green with a detection limit of 0.061 μM. The sensor possessed highly selective recognition and was successfully applied to detect DOX in complicated real samples. Moreover, with the fluorescent color collection and data processing, the smartphone-assisted visual detection of the sensors showed satisfied sensitivity with low detection limit. This work provides great potential applications for rapid and visual detection of antibiotics in complex substrates.
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Affiliation(s)
- Jiaqi Miao
- School of Pharmacy, Binzhou Medical University, Yantai 264003, China
| | - Jialuo Yu
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Shandong Key Laboratory of Coastal Environmental Processes, Research Centre for Coastal Environmental Engineering and Technology, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; Laboratory for Marine Biology and Biotechnology,Qingdao Marine Science and Technology Center, Qingdao 266237, China
| | - Xinming Zhao
- School of Pharmacy, Binzhou Medical University, Yantai 264003, China
| | - Xinru Chen
- School of Pharmacy, Binzhou Medical University, Yantai 264003, China
| | - Congzheng Zhu
- School of Pharmacy, Binzhou Medical University, Yantai 264003, China
| | - Xin Cao
- School of Pharmacy, Binzhou Medical University, Yantai 264003, China
| | - Yan Huang
- School of Pharmacy, Binzhou Medical University, Yantai 264003, China
| | - Bowei Li
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Shandong Key Laboratory of Coastal Environmental Processes, Research Centre for Coastal Environmental Engineering and Technology, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; Laboratory for Marine Biology and Biotechnology,Qingdao Marine Science and Technology Center, Qingdao 266237, China
| | - Yixuan Wu
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Shandong Key Laboratory of Coastal Environmental Processes, Research Centre for Coastal Environmental Engineering and Technology, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; Laboratory for Marine Biology and Biotechnology,Qingdao Marine Science and Technology Center, Qingdao 266237, China
| | - Lingxin Chen
- School of Pharmacy, Binzhou Medical University, Yantai 264003, China; CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Shandong Key Laboratory of Coastal Environmental Processes, Research Centre for Coastal Environmental Engineering and Technology, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; Laboratory for Marine Biology and Biotechnology,Qingdao Marine Science and Technology Center, Qingdao 266237, China.
| | - Xiaoyan Wang
- School of Pharmacy, Binzhou Medical University, Yantai 264003, China.
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Huang J, Zhang M, Huang J, Deng X, Zhang X, Miao C, Weng S. Detection of Doxycycline Using Carbon Quantum dots as Probe Based on Internal Filtering Effect. J Fluoresc 2024; 34:1353-1363. [PMID: 37530930 DOI: 10.1007/s10895-023-03373-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 07/25/2023] [Indexed: 08/03/2023]
Abstract
The establishment of a convenient and effective detection method for doxycycline (DC) holds significant importance in drug monitoring and drug residue assessment. In this work, carbon quantum dots (CQDs) with excellent and stable luminescence performance (the quantum yield of CQDs was 21.8%) were synthesized by the melting method and employed as probes to monitor the fluorescence intensity variations before and after the introduction of DC. A fluorescence analytical method based on the internal filtration effect (IFE) was developed for DC determination. The mechanism of DC quenching CQDs was verified using fluorescence lifetime tests, absorption spectroscopy, and evaluation of internal filtration parameters. After optimizing experimental conditions, it was found that the DC concentration (CDC) exhibited a good linear relationship with the fluorescence quenching efficiency ((F0-F)/F0) of CQDs in the range of 5-30 µM. The fitted linear equation was Y = 0.01249*CDC+0.03625, R2 = 0.9987, and the detection limit was 2.343 µM (n = 8). This developed method has been successfully applied to accurately determine DC concentrations in both doxycycline hydrochloride tablets and human serum samples. It stands out for its simplicity, rapidity, and acceptable detection performance. Due to its advantages, this method holds great promise for application in the biomedical field for monitoring DC drug concentrations and ensuring quality control.
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Affiliation(s)
- Jianhou Huang
- Department of Pharmacy, Quanzhou First Hospital Affiliated to Fujian Medical University, Quanzhou, 362000, China
- Department of Pharmaceutical Analysis, School of Pharmacy, Fujian Medical University, Fuzhou, 350122, China
| | - Menghan Zhang
- Department of Pharmaceutical Analysis, School of Pharmacy, Fujian Medical University, Fuzhou, 350122, China
| | - Jiyue Huang
- Department of Pharmacy, the 900th Hospital of China Joint Logistics Support Force, Fuzhou, 350025, China
| | - Xiaoqin Deng
- Department of Pharmaceutical Analysis, School of Pharmacy, Fujian Medical University, Fuzhou, 350122, China
| | - Xintian Zhang
- Department of Pharmaceutical Analysis, School of Pharmacy, Fujian Medical University, Fuzhou, 350122, China
| | - Chenfang Miao
- Department of Pharmacy, the 900th Hospital of China Joint Logistics Support Force, Fuzhou, 350025, China.
| | - Shaohuang Weng
- Department of Pharmaceutical Analysis, School of Pharmacy, Fujian Medical University, Fuzhou, 350122, China
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Stewart J, Oware K, Donnell D, Violette LR, Odoyo J, Soge OO, Scoville CW, Omollo V, Mogaka FO, Sesay FA, McClelland RS, Spinelli M, Gandhi M, Bukusi EA, Baeten JM. Doxycycline Prophylaxis to Prevent Sexually Transmitted Infections in Women. N Engl J Med 2023; 389:2331-2340. [PMID: 38118022 PMCID: PMC10805625 DOI: 10.1056/nejmoa2304007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2023]
Abstract
BACKGROUND Doxycycline postexposure prophylaxis (PEP) has been shown to prevent sexually transmitted infections (STIs) among cisgender men and transgender women, but data from trials involving cisgender women are lacking. METHODS We conducted a randomized, open-label trial comparing doxycycline PEP (doxycycline hyclate, 200 mg taken within 72 hours after condomless sex) with standard care among Kenyan women 18 to 30 years of age who were receiving preexposure prophylaxis against human immunodeficiency virus (HIV). The primary end point was any incident infection with Chlamydia trachomatis, Neisseria gonorrhoeae, or Treponema pallidum. Hair samples were collected quarterly for objective assessment of doxycycline use. RESULTS A total of 449 participants underwent randomization; 224 were assigned to the doxycycline-PEP group and 225 to the standard-care group. Participants were followed quarterly over 12 months. A total of 109 incident STIs occurred (50 in the doxycycline-PEP group [25.1 per 100 person-years] and 59 in the standard-care group [29.0 per 100 person-years]), with no significant between-group difference in incidence (relative risk, 0.88; 95% confidence interval [CI], 0.60 to 1.29; P = 0.51). Among the 109 incident STIs, chlamydia accounted for 85 (78.0%) (35 in the doxycycline-PEP group and 50 in the standard-care group; relative risk, 0.73; 95% CI, 0.47 to 1.13). No serious adverse events were considered by the trial investigators to be related to doxycycline, and there were no incident HIV infections. Among 50 randomly selected participants in the doxycycline-PEP group, doxycycline was detected in 58 of 200 hair samples (29.0%). All N. gonorrhoeae-positive isolates were resistant to doxycycline. CONCLUSIONS Among cisgender women, the incidence of STIs was not significantly lower with doxycycline PEP than with standard care. According to hair-sample analysis, the use of doxycycline PEP among those assigned to receive it was low. (Funded by the National Institutes of Health; dPEP ClinicalTrials.gov number, NCT04050540.).
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Affiliation(s)
- Jenell Stewart
- From the Division of Infectious Diseases, Hennepin Healthcare Research Institute, and the Department of Medicine, University of Minnesota - both in Minneapolis (J.S.); Kenya Medical Research Institute, Kisumu (K.O., J.O., V.O., F.O.M., E.A.B.); Fred Hutchinson Cancer Research Center (D.D.) and the Departments of Epidemiology (L.R.V., F.A.S., R.S.M.), Global Health (O.O.S., C.W.S., R.S.M., E.A.B., J.M.B.), Medicine (Infectious Diseases) (L.R.V., O.O.S., R.S.M., J.M.B.), and Obstetrics and Gynecology (E.A.B.), University of Washington, Seattle; and the Division of HIV, Infectious Diseases, and Global Medicine, University of California, San Francisco, San Francisco (M.S., M.G.)
| | - Kevin Oware
- From the Division of Infectious Diseases, Hennepin Healthcare Research Institute, and the Department of Medicine, University of Minnesota - both in Minneapolis (J.S.); Kenya Medical Research Institute, Kisumu (K.O., J.O., V.O., F.O.M., E.A.B.); Fred Hutchinson Cancer Research Center (D.D.) and the Departments of Epidemiology (L.R.V., F.A.S., R.S.M.), Global Health (O.O.S., C.W.S., R.S.M., E.A.B., J.M.B.), Medicine (Infectious Diseases) (L.R.V., O.O.S., R.S.M., J.M.B.), and Obstetrics and Gynecology (E.A.B.), University of Washington, Seattle; and the Division of HIV, Infectious Diseases, and Global Medicine, University of California, San Francisco, San Francisco (M.S., M.G.)
| | - Deborah Donnell
- From the Division of Infectious Diseases, Hennepin Healthcare Research Institute, and the Department of Medicine, University of Minnesota - both in Minneapolis (J.S.); Kenya Medical Research Institute, Kisumu (K.O., J.O., V.O., F.O.M., E.A.B.); Fred Hutchinson Cancer Research Center (D.D.) and the Departments of Epidemiology (L.R.V., F.A.S., R.S.M.), Global Health (O.O.S., C.W.S., R.S.M., E.A.B., J.M.B.), Medicine (Infectious Diseases) (L.R.V., O.O.S., R.S.M., J.M.B.), and Obstetrics and Gynecology (E.A.B.), University of Washington, Seattle; and the Division of HIV, Infectious Diseases, and Global Medicine, University of California, San Francisco, San Francisco (M.S., M.G.)
| | - Lauren R Violette
- From the Division of Infectious Diseases, Hennepin Healthcare Research Institute, and the Department of Medicine, University of Minnesota - both in Minneapolis (J.S.); Kenya Medical Research Institute, Kisumu (K.O., J.O., V.O., F.O.M., E.A.B.); Fred Hutchinson Cancer Research Center (D.D.) and the Departments of Epidemiology (L.R.V., F.A.S., R.S.M.), Global Health (O.O.S., C.W.S., R.S.M., E.A.B., J.M.B.), Medicine (Infectious Diseases) (L.R.V., O.O.S., R.S.M., J.M.B.), and Obstetrics and Gynecology (E.A.B.), University of Washington, Seattle; and the Division of HIV, Infectious Diseases, and Global Medicine, University of California, San Francisco, San Francisco (M.S., M.G.)
| | - Josephine Odoyo
- From the Division of Infectious Diseases, Hennepin Healthcare Research Institute, and the Department of Medicine, University of Minnesota - both in Minneapolis (J.S.); Kenya Medical Research Institute, Kisumu (K.O., J.O., V.O., F.O.M., E.A.B.); Fred Hutchinson Cancer Research Center (D.D.) and the Departments of Epidemiology (L.R.V., F.A.S., R.S.M.), Global Health (O.O.S., C.W.S., R.S.M., E.A.B., J.M.B.), Medicine (Infectious Diseases) (L.R.V., O.O.S., R.S.M., J.M.B.), and Obstetrics and Gynecology (E.A.B.), University of Washington, Seattle; and the Division of HIV, Infectious Diseases, and Global Medicine, University of California, San Francisco, San Francisco (M.S., M.G.)
| | - Olusegun O Soge
- From the Division of Infectious Diseases, Hennepin Healthcare Research Institute, and the Department of Medicine, University of Minnesota - both in Minneapolis (J.S.); Kenya Medical Research Institute, Kisumu (K.O., J.O., V.O., F.O.M., E.A.B.); Fred Hutchinson Cancer Research Center (D.D.) and the Departments of Epidemiology (L.R.V., F.A.S., R.S.M.), Global Health (O.O.S., C.W.S., R.S.M., E.A.B., J.M.B.), Medicine (Infectious Diseases) (L.R.V., O.O.S., R.S.M., J.M.B.), and Obstetrics and Gynecology (E.A.B.), University of Washington, Seattle; and the Division of HIV, Infectious Diseases, and Global Medicine, University of California, San Francisco, San Francisco (M.S., M.G.)
| | - Caitlin W Scoville
- From the Division of Infectious Diseases, Hennepin Healthcare Research Institute, and the Department of Medicine, University of Minnesota - both in Minneapolis (J.S.); Kenya Medical Research Institute, Kisumu (K.O., J.O., V.O., F.O.M., E.A.B.); Fred Hutchinson Cancer Research Center (D.D.) and the Departments of Epidemiology (L.R.V., F.A.S., R.S.M.), Global Health (O.O.S., C.W.S., R.S.M., E.A.B., J.M.B.), Medicine (Infectious Diseases) (L.R.V., O.O.S., R.S.M., J.M.B.), and Obstetrics and Gynecology (E.A.B.), University of Washington, Seattle; and the Division of HIV, Infectious Diseases, and Global Medicine, University of California, San Francisco, San Francisco (M.S., M.G.)
| | - Victor Omollo
- From the Division of Infectious Diseases, Hennepin Healthcare Research Institute, and the Department of Medicine, University of Minnesota - both in Minneapolis (J.S.); Kenya Medical Research Institute, Kisumu (K.O., J.O., V.O., F.O.M., E.A.B.); Fred Hutchinson Cancer Research Center (D.D.) and the Departments of Epidemiology (L.R.V., F.A.S., R.S.M.), Global Health (O.O.S., C.W.S., R.S.M., E.A.B., J.M.B.), Medicine (Infectious Diseases) (L.R.V., O.O.S., R.S.M., J.M.B.), and Obstetrics and Gynecology (E.A.B.), University of Washington, Seattle; and the Division of HIV, Infectious Diseases, and Global Medicine, University of California, San Francisco, San Francisco (M.S., M.G.)
| | - Felix O Mogaka
- From the Division of Infectious Diseases, Hennepin Healthcare Research Institute, and the Department of Medicine, University of Minnesota - both in Minneapolis (J.S.); Kenya Medical Research Institute, Kisumu (K.O., J.O., V.O., F.O.M., E.A.B.); Fred Hutchinson Cancer Research Center (D.D.) and the Departments of Epidemiology (L.R.V., F.A.S., R.S.M.), Global Health (O.O.S., C.W.S., R.S.M., E.A.B., J.M.B.), Medicine (Infectious Diseases) (L.R.V., O.O.S., R.S.M., J.M.B.), and Obstetrics and Gynecology (E.A.B.), University of Washington, Seattle; and the Division of HIV, Infectious Diseases, and Global Medicine, University of California, San Francisco, San Francisco (M.S., M.G.)
| | - Fredericka A Sesay
- From the Division of Infectious Diseases, Hennepin Healthcare Research Institute, and the Department of Medicine, University of Minnesota - both in Minneapolis (J.S.); Kenya Medical Research Institute, Kisumu (K.O., J.O., V.O., F.O.M., E.A.B.); Fred Hutchinson Cancer Research Center (D.D.) and the Departments of Epidemiology (L.R.V., F.A.S., R.S.M.), Global Health (O.O.S., C.W.S., R.S.M., E.A.B., J.M.B.), Medicine (Infectious Diseases) (L.R.V., O.O.S., R.S.M., J.M.B.), and Obstetrics and Gynecology (E.A.B.), University of Washington, Seattle; and the Division of HIV, Infectious Diseases, and Global Medicine, University of California, San Francisco, San Francisco (M.S., M.G.)
| | - R Scott McClelland
- From the Division of Infectious Diseases, Hennepin Healthcare Research Institute, and the Department of Medicine, University of Minnesota - both in Minneapolis (J.S.); Kenya Medical Research Institute, Kisumu (K.O., J.O., V.O., F.O.M., E.A.B.); Fred Hutchinson Cancer Research Center (D.D.) and the Departments of Epidemiology (L.R.V., F.A.S., R.S.M.), Global Health (O.O.S., C.W.S., R.S.M., E.A.B., J.M.B.), Medicine (Infectious Diseases) (L.R.V., O.O.S., R.S.M., J.M.B.), and Obstetrics and Gynecology (E.A.B.), University of Washington, Seattle; and the Division of HIV, Infectious Diseases, and Global Medicine, University of California, San Francisco, San Francisco (M.S., M.G.)
| | - Matthew Spinelli
- From the Division of Infectious Diseases, Hennepin Healthcare Research Institute, and the Department of Medicine, University of Minnesota - both in Minneapolis (J.S.); Kenya Medical Research Institute, Kisumu (K.O., J.O., V.O., F.O.M., E.A.B.); Fred Hutchinson Cancer Research Center (D.D.) and the Departments of Epidemiology (L.R.V., F.A.S., R.S.M.), Global Health (O.O.S., C.W.S., R.S.M., E.A.B., J.M.B.), Medicine (Infectious Diseases) (L.R.V., O.O.S., R.S.M., J.M.B.), and Obstetrics and Gynecology (E.A.B.), University of Washington, Seattle; and the Division of HIV, Infectious Diseases, and Global Medicine, University of California, San Francisco, San Francisco (M.S., M.G.)
| | - Monica Gandhi
- From the Division of Infectious Diseases, Hennepin Healthcare Research Institute, and the Department of Medicine, University of Minnesota - both in Minneapolis (J.S.); Kenya Medical Research Institute, Kisumu (K.O., J.O., V.O., F.O.M., E.A.B.); Fred Hutchinson Cancer Research Center (D.D.) and the Departments of Epidemiology (L.R.V., F.A.S., R.S.M.), Global Health (O.O.S., C.W.S., R.S.M., E.A.B., J.M.B.), Medicine (Infectious Diseases) (L.R.V., O.O.S., R.S.M., J.M.B.), and Obstetrics and Gynecology (E.A.B.), University of Washington, Seattle; and the Division of HIV, Infectious Diseases, and Global Medicine, University of California, San Francisco, San Francisco (M.S., M.G.)
| | - Elizabeth A Bukusi
- From the Division of Infectious Diseases, Hennepin Healthcare Research Institute, and the Department of Medicine, University of Minnesota - both in Minneapolis (J.S.); Kenya Medical Research Institute, Kisumu (K.O., J.O., V.O., F.O.M., E.A.B.); Fred Hutchinson Cancer Research Center (D.D.) and the Departments of Epidemiology (L.R.V., F.A.S., R.S.M.), Global Health (O.O.S., C.W.S., R.S.M., E.A.B., J.M.B.), Medicine (Infectious Diseases) (L.R.V., O.O.S., R.S.M., J.M.B.), and Obstetrics and Gynecology (E.A.B.), University of Washington, Seattle; and the Division of HIV, Infectious Diseases, and Global Medicine, University of California, San Francisco, San Francisco (M.S., M.G.)
| | - Jared M Baeten
- From the Division of Infectious Diseases, Hennepin Healthcare Research Institute, and the Department of Medicine, University of Minnesota - both in Minneapolis (J.S.); Kenya Medical Research Institute, Kisumu (K.O., J.O., V.O., F.O.M., E.A.B.); Fred Hutchinson Cancer Research Center (D.D.) and the Departments of Epidemiology (L.R.V., F.A.S., R.S.M.), Global Health (O.O.S., C.W.S., R.S.M., E.A.B., J.M.B.), Medicine (Infectious Diseases) (L.R.V., O.O.S., R.S.M., J.M.B.), and Obstetrics and Gynecology (E.A.B.), University of Washington, Seattle; and the Division of HIV, Infectious Diseases, and Global Medicine, University of California, San Francisco, San Francisco (M.S., M.G.)
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Poddar K, Sarkar D, Sahu JR, Patil PB, Pal SK, Sarkar A. Techno-economic assessment of doxycycline recovery using rice straw biochar: A circular economic execution. Chemosphere 2023; 338:139504. [PMID: 37453520 DOI: 10.1016/j.chemosphere.2023.139504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 07/03/2023] [Accepted: 07/12/2023] [Indexed: 07/18/2023]
Abstract
The non-scientific disposal of antibiotics has resulted in massive contamination of the bioactive molecules in the aquatic ecosystem. The presence of antibiotics in the effluents limits the biodegradation of micropollutants by affecting the micro-ecological balance. Hence this study aims to remove doxycycline antibiotics from wastewater using biochar. Elemental analysis of the biochar revealed C, Si and N as most abundant content while BET analysis confirmed the mesoporous nature of the adsorbent. The XRD and Raman spectra confirmed amorphic sp2 carbon dominant structure in the biochar. The adsorption mechanism was predicted, correlating the charge distribution and FTIR analysis. The effects of different process parameters were studied using CCD, ANOVA, and RSM. Moreover, the different kinetic models revealed that the pseudo-second-order kinetics model was the best fit and film layer diffusion was the dominant contributor. The isotherm study indicated the high adsorption capacity of the biochar and its non-ionic nature. Thermodynamics study established the spontaneity and exothermic nature. The results suggested no significant change in antibiotic removal efficiency across different system (pond water (97.13%), river water (98.11%), seawater (96.84%), tap water (99.13%), and distilled water (99.74%)). For the desorption of the antibiotic from the biochar surface, 90% ethanol was the most efficient (98.9%), and upon recrystallization by solvent evaporation, 98.7% of the antibiotic of the initial load was recovered. Hence, the implementation of this described process would enable resource recovery along with water treatment, which is not possible with existing approaches. The cost analysis of the whole process revealed that biochar preparation was the bulk expense and the process would be self-sustainable even if the price of the recovered antibiotic would be set at less than half ($41/kg) of the current market price ($94/kg) of the API. Thus, the process endorses a successful circular economy approach toward societal and economic sustainability.
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Affiliation(s)
- Kasturi Poddar
- Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Odisha, 769008, India.
| | - Debapriya Sarkar
- Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Odisha, 769008, India.
| | - Jyotsna Rani Sahu
- Department of Botany and Biotechnology, Ravenshaw University, Odisha, 753003, India.
| | - Pritam Bajirao Patil
- Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Odisha, 769008, India.
| | - Sumit Kumar Pal
- Department of Ceramic Engineering, National Institute of Technology Rourkela, Odisha, 769008, India.
| | - Angana Sarkar
- Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Odisha, 769008, India.
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Che H, Nie Y, Tian X, Li Y. New method for morphological identification and simultaneous quantification of multiple tetracyclines by a white fluorescent probe. J Hazard Mater 2023; 441:129956. [PMID: 36108497 DOI: 10.1016/j.jhazmat.2022.129956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 08/16/2022] [Accepted: 09/06/2022] [Indexed: 06/15/2023]
Abstract
The threat of tetracycline antibiotics to the environment and human health is attracting widespread attention. The development of morphological analysis and quantitative techniques of multiple tetracyclines is of great significance for the evaluation of biochemical toxicity, wide-spectrum antibacterial property and degradation cycle between different tetracyclines. In this study, the white fluorescent Eu/Tb@CDs was synthesized and applied successfully to the identification and detection of the most widely used tetracycline antibiotics (tetracycline (TC), oxytetracycline (OC), chlortetracycline (CC) and doxycycline (DC)) with detection limits all below 1 nM. For the actual water samples with coexistence of the above 4 tetracyclines, their simultaneous morphology identification and accurate quantitative detection can also be realized through simple spectrometric measurement. In addition, the selective and competitive experiments have been carried out on the pollutants widely present in water, and the results have also confirmed that other pollutants could not interfere with the detection of the above 4 tetracyclines. It is undeniable that this work will conveniently and visually reveal the existence information and geographical distribution characteristics of different tetracycline antibiotics in the environment and their action mechanism on organisms.
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Affiliation(s)
- Huachao Che
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Yulun Nie
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
| | - Xike Tian
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Yong Li
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
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Stando K, Korzeniewska E, Felis E, Harnisz M, Bajkacz S. Uptake of Pharmaceutical Pollutants and Their Metabolites from Soil Fertilized with Manure to Parsley Tissues. Molecules 2022; 27:molecules27144378. [PMID: 35889250 PMCID: PMC9317704 DOI: 10.3390/molecules27144378] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 07/05/2022] [Accepted: 07/05/2022] [Indexed: 02/06/2023] Open
Abstract
Manure is a major source of soil and plant contamination with veterinary drugs residues. The aim of this study was to evaluate the uptake of 14 veterinary pharmaceuticals by parsley from soil fertilized with manure. Pharmaceutical content was determined in roots and leaves. Liquid chromatography coupled with tandem mass spectrometry was used for targeted analysis. Screening analysis was performed to identify transformation products in the parsley tissues. A solid-liquid extraction procedure was developed combined with solid-phase extraction, providing recoveries of 61.9–97.1% for leaves and 51.7–95.6% for roots. Four analytes were detected in parsley: enrofloxacin, tylosin, sulfamethoxazole, and doxycycline. Enrofloxacin was detected at the highest concentrations (13.4–26.3 ng g−1). Doxycycline accumulated mainly in the roots, tylosin in the leaves, and sulfamethoxazole was found in both tissues. 14 transformation products were identified and their distribution were determined. This study provides important data on the uptake and transformation of pharmaceuticals in plant tissues.
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Affiliation(s)
- Klaudia Stando
- Department of Inorganic, Analytical Chemistry and Electrochemistry, Faculty of Chemistry, Silesian University of Technology, B. Krzywoustego 6 Str., 44-100 Gliwice, Poland
- Correspondence: (K.S.); (S.B.)
| | - Ewa Korzeniewska
- Department of Engineering of Water Protection and Environmental Microbiology, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Prawocheńskiego 1 Str., 10-720 Olsztyn, Poland; (E.K.); (M.H.)
| | - Ewa Felis
- Centre for Biotechnology, Silesian University of Technology, B. Krzywoustego 8 Str., 44-100 Gliwice, Poland;
- Environmental Biotechnology Department, Faculty of Power and Environmental Engineering, Silesian University of Technology, Akademicka 2 Str., 44-100 Gliwice, Poland
| | - Monika Harnisz
- Department of Engineering of Water Protection and Environmental Microbiology, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Prawocheńskiego 1 Str., 10-720 Olsztyn, Poland; (E.K.); (M.H.)
| | - Sylwia Bajkacz
- Department of Inorganic, Analytical Chemistry and Electrochemistry, Faculty of Chemistry, Silesian University of Technology, B. Krzywoustego 6 Str., 44-100 Gliwice, Poland
- Centre for Biotechnology, Silesian University of Technology, B. Krzywoustego 8 Str., 44-100 Gliwice, Poland;
- Correspondence: (K.S.); (S.B.)
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7
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Liu F, Ma M, Li L, Wang M, Qin Y, Xu F. [Investigation and health risk assessment of veterinary drug residues in chickens and eggs sold in Ningxia from 2016 to 2020]. Wei Sheng Yan Jiu 2022; 51:497-508. [PMID: 35718917 DOI: 10.19813/j.cnki.weishengyanjiu.2022.03.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
OBJECTIVE To understand the monitoring status of veterinary drug residues in chickens and eggs sold in Ningxia from 2016 to 2020, and to evaluate the health risks of human intake. METHODS A total of 303 chicken and 237 eggs were collected from 2016 to 2020, and the veterinary drug residues in chickens and eggs sold in Ningxia were detected and analyzed by high performance liquid chromatography-tandem mass spectrometry. The food safety index method was used to assess the health risks in combination with the dietary intake of residents. RESULTS The detection rate of veterinary drug residues in chicken was 38.0%(115/303), and the over-standard rate was 7.6%(23/303). The detection rate of veterinary drug residues in eggs was 26.6%(63/237), and the over-standard rate was 19.8%(47/237). The food safety index of doxycycline in chicken was 4.59, and the food safety indexes of doxycycline, flumequine and flufenicol in eggs were 7.09, 26.5 and 2.33, respectively, all of which were much higher than 1, suggesting that there were health risks. The food safety indexes of other substances were all less than 1, and the food safety indexes were all acceptable. CONCLUSION Veterinary drugs were widely detected in chicken and eggs in Ningxia from 2016 to 2020. Some veterinary drugs had hidden health risks.
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Affiliation(s)
- Feng Liu
- Ningxia Hui Autonomous Region Center for Disease Control and Prevention, Yinchuan 750004, China
| | - Mingyang Ma
- Ningxia Hui Autonomous Region Center for Disease Control and Prevention, Yinchuan 750004, China
| | - Lei Li
- Ningxia Hui Autonomous Region Center for Disease Control and Prevention, Yinchuan 750004, China
| | - Mo Wang
- Ningxia Hui Autonomous Region Center for Disease Control and Prevention, Yinchuan 750004, China
| | - Yingxu Qin
- Ningxia Hui Autonomous Region Center for Disease Control and Prevention, Yinchuan 750004, China
| | - Fei Xu
- Ningxia Hui Autonomous Region Center for Disease Control and Prevention, Yinchuan 750004, China
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8
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Gajda A, Szymanek-Bany I, Nowacka-Kozak E, Gbylik-Sikorska M. Risk to Public Health Regarding Doxycycline Residues in Chicken Claws. J Agric Food Chem 2022; 70:2495-2500. [PMID: 35179032 DOI: 10.1021/acs.jafc.1c07480] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Doxycycline residues in claws may pose a potential risk to humans. A study with broiler chickens was performed to find the concentrations of doxycycline in claws after treatment. For the quantification of the antibiotic of interest in claws, an ultrahigh-performance liquid chromatography-tandem mass spectrometry method was developed. Doxycycline was detectable at 3043 μg/kg at sub-therapeutic treatment, 223 μg/kg after therapeutic doses, and 14 μg/kg after spray application on the last day of the experiment (day 22). Almost 70 days is required for the concentration of doxycycline to reach zero. The obtained results show that monitoring of doxycycline in claws should be implemented.
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Affiliation(s)
- Anna Gajda
- Department of Pharmacology and Toxicology, National Veterinary Research Institute, Partyzantów 57, 24-100 Pulawy, Poland
| | - Iwona Szymanek-Bany
- Department of Pharmacology and Toxicology, National Veterinary Research Institute, Partyzantów 57, 24-100 Pulawy, Poland
| | - Ewelina Nowacka-Kozak
- Department of Pharmacology and Toxicology, National Veterinary Research Institute, Partyzantów 57, 24-100 Pulawy, Poland
| | - Małgorzata Gbylik-Sikorska
- Department of Pharmacology and Toxicology, National Veterinary Research Institute, Partyzantów 57, 24-100 Pulawy, Poland
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Sarker YA, Rashid SZ, Sachi S, Ferdous J, Das Chowdhury BL, Tarannum SS, Sikder MH. Exposure pathways and ecological risk assessment of common veterinary antibiotics in the environment through poultry litter in Bangladesh. J Environ Sci Health B 2020; 55:1061-1068. [PMID: 32960146 DOI: 10.1080/03601234.2020.1816090] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Veterinary antibiotics (VAs) have entered the ecosystem principally through the application of organic fertilizer. However, factors influencing the contributions made by the prescribers and users thereof with respect to VAs in poultry manure have not been investigated. The purpose of this paper, therefore, is to identify factors associated with the VA prescription and usage as well as to measure the residual concentration along with the ecological risk of common VAs in poultry litter in Bangladesh. Structured questionnaire surveys were conducted so as to provide an understanding the perspective of prescribers and farmers. Ciprofloxacin (CIP), enrofloxacin (ENR), oxytetracycline (OTC), and doxycycline (DOX) were screened through the use of thin-layer chromatography (TLC) and quantified through high-performance liquid chromatography (HPLC). Also, methods of risk quotient (RQ) were applied to assess ecotoxicity. Most VAs were prescribed without a confirmatory diagnosis. The residue of CIP was dominant with a high concentration, followed by OTC but with a low concentration. A high ecological risk was associated with the use of OTC and DOX whereas the risk associated with the use of CIP and ENR was insignificant to low. The study highlights prescriber and user factors along with the variable ecological risk of VAs in litter.
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Affiliation(s)
- Yousuf A Sarker
- Department of Pharmacology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Sm Z Rashid
- Department of Pharmacology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Sabbya Sachi
- Department of Pharmacology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Jannatul Ferdous
- Department of Pharmacology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Bishan L Das Chowdhury
- Department of Biochemistry and Molecular Biology, Faculty of Agriculture, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Syeda S Tarannum
- Department of Pharmacology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Mahmudul H Sikder
- Department of Pharmacology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh
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10
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Siddiqui A, Anwar H, Ahmed SW, Naqvi S, Shah MR, Ahmed A, Ali SA. Synthesis and sensitive detection of doxycycline with sodium bis 2-ethylhexylsulfosuccinate based silver nanoparticle. Spectrochim Acta A Mol Biomol Spectrosc 2020; 225:117489. [PMID: 31476646 DOI: 10.1016/j.saa.2019.117489] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 07/23/2019] [Accepted: 08/25/2019] [Indexed: 06/10/2023]
Abstract
The monitoring of residual antibiotics in the environment has gained a significant importance for the effective control, because of the high risk to human health. A simple strategy was designed for the green synthesis and detection of doxycycline (Dox) by using anionic surfactant sodium bis 2-ethylhexylsulfosuccinate based silver nanoparticles (AOT-AgNPs). The chemical reduction and capping of Ag+1 ions was achieved by sulfonyl and carbonyl functional groups of AOT molecule. The AOT-AgNPs were found to have excellent stability at variable environmental parameters (i.e. temperature, storage period, salt concentration and pH) possibly due to the strong emulsifying nature of the surfactant. Mechanism of interaction between the AOT-AgNPs and Dox was established with UV/visible, Fourier transform infrared (FTIR) spectroscopy, Atomic force microscopy (AFM) and Dynamic light scattering (DLS) techniques, which suggests the interaction via aggregates formation. The synthesize probe could detect the Dox within 15 min over a wide range of concentrations from 0.1 to 140μM with limit of detection (LOD) of 0.2 μM. As proof of strategy, we have illustrated that the AOT-AgNPs also detect Dox in biological and environmental samples with negligible interference and very significant recovery rates. Moreover, non-toxic nature against various tested cell lines (i.e. normal mouse fibroblast (NIH-3 T3) and cancerous non-small lung carcinoma (NCI-H460)) and significant antimicrobial, antibiofilm and biofilm eradicating potential of AOT-AgNPs were provide ideal nanomaterial for further applications.
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Affiliation(s)
- Asma Siddiqui
- Department of Chemistry, Federal Urdu University of Arts, Science and Technology, Gulshan-e-Iqbal, Campus Karachi, Karachi, Pakistan
| | - Humera Anwar
- Department of Chemistry, Federal Urdu University of Arts, Science and Technology, Gulshan-e-Iqbal, Campus Karachi, Karachi, Pakistan
| | - Syed Waseem Ahmed
- Department of Chemistry, Federal Urdu University of Arts, Science and Technology, Gulshan-e-Iqbal, Campus Karachi, Karachi, Pakistan; H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Sumra Naqvi
- Department of Chemistry, Federal Urdu University of Arts, Science and Technology, Gulshan-e-Iqbal, Campus Karachi, Karachi, Pakistan
| | - Muhammed Raza Shah
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Ayaz Ahmed
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi 75270, Pakistan
| | - Syed Abid Ali
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan.
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11
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Osińska A, Korzeniewska E, Harnisz M, Felis E, Bajkacz S, Jachimowicz P, Niestępski S, Konopka I. Small-scale wastewater treatment plants as a source of the dissemination of antibiotic resistance genes in the aquatic environment. J Hazard Mater 2020; 381:121221. [PMID: 31561123 DOI: 10.1016/j.jhazmat.2019.121221] [Citation(s) in RCA: 104] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 09/11/2019] [Accepted: 09/11/2019] [Indexed: 05/08/2023]
Abstract
Wastewater treatment plants (WWTPs) are significant source of antibiotic resistant bacteria (ARB) and antibiotic resistance genes (ARGs), which can spread further in the environment by reaching rivers together with effluents discharged from WWTPs. In this study untreated and treated wastewater (UWW, TWW), upstream and downstream river water (URW, DRW) were collected from 4 WWTPs, in the winter and autumn seasons. The occurrence of ARB resistant to beta-lactams and tetracyclines as well as the presence of antibiotics from these classes were analysed in water and wastewater samples. Additionally, the amounts of 12 ARGs, 2 genes of mobile genetic elements (MGEs), gene uidA identifying E. coli and 16S rRNA were also determined. Resistance to beta-lactams prevailed among ARB in water and wastewater samples (constituting 82-88% of total counts of bacteria). The dominant genes in water and wastewater samples were blaTEM, tetA, sul1. The gene blaOXA demonstrated high variability of its concentration in samples collected in both seasons. Despite the high per cent reduction of ARB and ARGs concentration observed during the wastewater treatment processes, their large quantities are still transmitted into the environment. The research focuses on WWTPs' role in the dissemination of ARGs and MGEs in the aquatic environment.
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Affiliation(s)
- Adriana Osińska
- Department of Environmental Microbiology, Faculty of Environmental Sciences, University of Warmia and Mazury in Olsztyn, Prawocheńskiego 1 Str., 10-720, Olsztyn, Poland
| | - Ewa Korzeniewska
- Department of Environmental Microbiology, Faculty of Environmental Sciences, University of Warmia and Mazury in Olsztyn, Prawocheńskiego 1 Str., 10-720, Olsztyn, Poland.
| | - Monika Harnisz
- Department of Environmental Microbiology, Faculty of Environmental Sciences, University of Warmia and Mazury in Olsztyn, Prawocheńskiego 1 Str., 10-720, Olsztyn, Poland
| | - Ewa Felis
- Environmental Biotechnology Department, Faculty of Energy and Environmental Engineering, Silesian University of Technology, Akademicka 2 Str., 44-100, Gliwice, Poland; The Biotechnology Centre, Silesian University of Technology, Krzywoustego 8 Str., 44-100, Gliwice, Poland
| | - Sylwia Bajkacz
- Department of Inorganic, Analytical Chemistry and Electrochemistry, Faculty of Chemistry, Silesian University of Technology, Krzywoustego 6 Str., 44-100, Gliwice, Poland; The Biotechnology Centre, Silesian University of Technology, Krzywoustego 8 Str., 44-100, Gliwice, Poland
| | - Piotr Jachimowicz
- Department of Environmental Microbiology, Faculty of Environmental Sciences, University of Warmia and Mazury in Olsztyn, Prawocheńskiego 1 Str., 10-720, Olsztyn, Poland
| | - Sebastian Niestępski
- Department of Environmental Microbiology, Faculty of Environmental Sciences, University of Warmia and Mazury in Olsztyn, Prawocheńskiego 1 Str., 10-720, Olsztyn, Poland
| | - Iwona Konopka
- Chair of Plant Raw Materials Chemistry and Processing, Faculty of Food Sciences, University of Warmia and Mazury in Olsztyn, Pl. Cieszyński 1, 10-957, Olsztyn, Poland
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12
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Xiong W, Zeng Z, Li X, Zeng G, Xiao R, Yang Z, Xu H, Chen H, Cao J, Zhou C, Qin L. Ni-doped MIL-53(Fe) nanoparticles for optimized doxycycline removal by using response surface methodology from aqueous solution. Chemosphere 2019; 232:186-194. [PMID: 31154179 DOI: 10.1016/j.chemosphere.2019.05.184] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Revised: 04/30/2019] [Accepted: 05/22/2019] [Indexed: 06/09/2023]
Abstract
This study proposes a facile one-pot solvothermal method to prepare Ni-doped MIL-53(Fe) nanoparticles as high-performance adsorbents for doxycycline removal. The morphology and structure of the samples were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, fourier transform infrared spectrum and thermogravimetric analysis. These results reveal that nickel was doped into MIL-53(Fe) successfully via a facile reaction, and the obtained Ni-doped MIL-53(Fe) nanoparticles showed excellent stability. The adsorption activities were evaluated in terms of the removal efficiencies of doxycycline (DOX) in aqueous solution. According to the response surface quadratic model (RSM), the optimal adsorption conditions were concentration of DOX 100 mg/L, temperature 35 °C, ionic strength 5 g/L and pH 7. The as-synthesized Ni-doped MIL-53(Fe) nanoparticles showed better adsorption capacity of 397.22 mg/g compared with other adsorbents. The investigation of adsorption mechanism demonstrated that the adsorption process was dominated by electrostatic and π-π stacking interactions. The Ni-doped MIL-53(Fe) nanoparticles with improved adsorption activities would have a great potential in DOX removal from aqueous environment.
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Affiliation(s)
- Weiping Xiong
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, 410082, China
| | - Zhuotong Zeng
- Department of Dermatology, Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, PR China
| | - Xin Li
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, 410082, China
| | - Guangming Zeng
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, 410082, China.
| | - Rong Xiao
- Department of Dermatology, Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, PR China.
| | - Zhaohui Yang
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, 410082, China
| | - Haiyin Xu
- College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
| | - Hongbo Chen
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, China
| | - Jiao Cao
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, 410082, China
| | - Chengyun Zhou
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, 410082, China
| | - Lei Qin
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, 410082, China
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Rostamian R, Behnejad H. A comprehensive adsorption study and modeling of antibiotics as a pharmaceutical waste by graphene oxide nanosheets. Ecotoxicol Environ Saf 2018; 147:117-123. [PMID: 28841526 DOI: 10.1016/j.ecoenv.2017.08.019] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 08/06/2017] [Accepted: 08/08/2017] [Indexed: 05/20/2023]
Abstract
The adsorption behavior of tetracycline (TCN), doxycycline (DCN) as the most common antibiotics in veterinary and ciprofloxacin (CPN) onto graphene oxide nanosheets (GOS) in aqueous solution was evaluated. The four factors influencing the adsorption of antibiotics (initial concentration, pH, temperature and contact time) were studied. The results showed that initial pH ∼ 6 to 7 and contact time ∼ 100 - 200min are optimum for each drug. The monolayer adsorption capacity was reduced with the increasing temperature from 25°C to 45°C. Non-linear regressions were carried out in order to define the best fit model for every system. To do this, eight error functions were applied to predict the optimum model. Among various models, Hill and Toth isotherm models represented the equilibrium adsorption data of antibiotics while the kinetic data were well fitted by pseudo second-order (PSO) kinetic model (DCN and TCN) and Elovich (CPN) models. The maximum adsorption capacity (qmax) is found to be in the following order: CPN >> DCN > TCN, obtained from sips equation at the same temperature. The GOS shows highest adsorption capacity towards CPN up to 173.4mgg-1. The study showed that GOS can be removed more efficiently from water solution.
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Affiliation(s)
- Rahele Rostamian
- Department of Physical Chemistry, School of Chemistry, University College of Science, University of Tehran, Tehran 14155, Iran
| | - Hassan Behnejad
- Department of Physical Chemistry, School of Chemistry, University College of Science, University of Tehran, Tehran 14155, Iran.
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Palamy S, Ruengsitagoon W. A novel flow injection spectrophotometric method using plant extracts as green reagent for the determination of doxycycline. Spectrochim Acta A Mol Biomol Spectrosc 2017; 171:200-206. [PMID: 27529768 DOI: 10.1016/j.saa.2016.08.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 08/05/2016] [Accepted: 08/07/2016] [Indexed: 06/06/2023]
Abstract
A novel flow injection spectrophotometric method was developed for the determination of doxycycline in pharmaceutical preparations using iron(III) contained in extracts from plants. The assay was based on the complex formed between doxycycline and iron(III) characterized by an absorption maximum at 435nm. The calibration graphs obtained over the doxycycline concentration range 5-250μgmL-1 gave correlation coefficients of 0.9979, 0.9987 and 0.9987 with the three green reagents prepared from Senna alata (L.) Roxb. (S. alata), Polygonum hydropiper L. (P. hydropiper) or Diplazium esculentum (Retz.) Sw. (D. esculentum), respectively. The relative standard deviations of the repeatability was <2.00%. The percentage recoveries were in the range of 98.27-101.03%. Doxycycline contents obtained by this new method and by the reference methods reported in literature were in agreement at 95% confidence level with the paired t-test. The sample throughput was 36h-1 for each green reagent.
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Affiliation(s)
- Sysay Palamy
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Wirat Ruengsitagoon
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen 40002, Thailand.
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Widyasari-Mehta A, Suwito HRKA, Kreuzig R. Laboratory testing on the removal of the veterinary antibiotic doxycycline during long-term liquid pig manure and digestate storage. Chemosphere 2016; 149:154-60. [PMID: 26855219 DOI: 10.1016/j.chemosphere.2016.01.094] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 01/21/2016] [Accepted: 01/23/2016] [Indexed: 05/23/2023]
Abstract
The veterinary antibiotic doxycycline (DOXY) is today frequently applied in conventional pig husbandry for the control of respiratory diseases. After the treatment, pigs excrete major amounts of DOXY as the unchanged active substance. Thus, DOXY residues were found in liquid manures and digestates of biogas plants at concentrations of mg kg(-1) dry weight. In order to assess the impact of field applications of contaminated manures and digestates on the entry of DOXY residues into arable and grassland soils, thorough information about the removal of DOXY during long-term storage of farm fertilizers is required. Since this aspect has been only less investigated for manures but not for digestates, first long-term storage simulation tests were performed at laboratory scale. Within the 170-d incubation periods under strictly anaerobic conditions, doxycycline was removed in liquid pig manure by 61% and in digestate by 76%. The calculated half-lives of 120 d and 91 d thus emphasized the persistence of doxycycline in both matrices. Due to the substance specific properties of DOXY, this removal was caused neither by mineralization, epimerization nor biotransformation. According to the high affinity of DOXY to manure and digestate solids, however, the formation of non-extractable residues has to be taken into account as the predominant concentration determining process. This was indicated by the sequential extraction procedure applied. Hence, these results confirmed that a full removal capacity for doxycycline cannot be reached through the long-term storage of farm fertilizers.
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Affiliation(s)
- Arum Widyasari-Mehta
- Technische Universität Braunschweig, Institut für Ökologische und Nachhaltige Chemie, Hagenring 30, 38106 Braunschweig, Germany
| | - Hanna Resti Kartika Ayu Suwito
- Technische Universität Braunschweig, Institut für Ökologische und Nachhaltige Chemie, Hagenring 30, 38106 Braunschweig, Germany
| | - Robert Kreuzig
- Technische Universität Braunschweig, Institut für Ökologische und Nachhaltige Chemie, Hagenring 30, 38106 Braunschweig, Germany.
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16
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Wang J, Lin H, Sun W, Xia Y, Ma J, Fu J, Zhang Z, Wu H, Qian M. Variations in the fate and biological effects of sulfamethoxazole, norfloxacin and doxycycline in different vegetable-soil systems following manure application. J Hazard Mater 2016; 304:49-57. [PMID: 26546703 DOI: 10.1016/j.jhazmat.2015.10.038] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 08/31/2015] [Accepted: 10/17/2015] [Indexed: 06/05/2023]
Abstract
The fate of sulfamethoxazole (SMZ), norfloxacin (NOR) and doxycycline (DOX) and their biological effects in radish and pakchoi culture systems were investigated. DOX dissipated more rapidly than SMZ and NOR, while radish and pakchoi cultivation increased the removal of residual DOX in soils. Dissipation of NOR was accelerated in radish soils but was slowed down slightly in pakchoi soils. Vegetable cultivation exerted an insignificant effect on SMZ removal. Investigation of antibiotic bioaccumulation showed that the uptake of DOX by radish and pakchoi was undetectable, but the radish accumulated more SMZ and NOR than pakchoi. Among the three antibiotics, only SMZ use exhibited an apparent suspension of plant seed germination, up-ground plant growth and soil microbial diversity. Pakchoi responded more sensitively to SMZ than did the radish. Principal component analysis (PCA) based on MicroRESP™ indicated that the sampling time and antibiotic treatments could influence the soil microbial community. Only in the pakchoi soils did antibiotic application exert a more robust effect on the microbial community than the sampling time; SMZ treatments and DOX treatments could be clearly discriminated from the control treatments. These results are crucial for an assessment of the potential risks of antibiotics to culture system practices and suggest that good agricultural practices help to limit or even reduce antibiotic pollution.
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Affiliation(s)
- Jianmei Wang
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Quality and Standard for Agro-Products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Hui Lin
- Environmental Resources and Soil Fertilizer Institute, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Wanchun Sun
- Environmental Resources and Soil Fertilizer Institute, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Yun Xia
- Environmental Resources and Soil Fertilizer Institute, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Junwei Ma
- Environmental Resources and Soil Fertilizer Institute, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Jianrong Fu
- Environmental Resources and Soil Fertilizer Institute, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Zulin Zhang
- The James Hutton Institute, Craigiebuckler, Aberdeen AB15 8QH, UK
| | - Huizhen Wu
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Quality and Standard for Agro-Products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Mingrong Qian
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Quality and Standard for Agro-Products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.
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Deng W, Li N, Zheng H, Lin H. Occurrence and risk assessment of antibiotics in river water in Hong Kong. Ecotoxicol Environ Saf 2016; 125:121-7. [PMID: 26685784 DOI: 10.1016/j.ecoenv.2015.12.002] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2015] [Revised: 11/30/2015] [Accepted: 12/01/2015] [Indexed: 05/25/2023]
Abstract
The occurrence and distribution of six typical antibiotics in the main rivers of Hong Kong were investigated using high-performance liquid chromatography electrospray ionization tandem mass spectrometry (HPLC-ES-MS/MS). The results revealed that the antibiotics were widely distributed in the area studied. Of the target antibiotics, ofloxacin was the most frequently detected in the rivers, with a detection rate of 69.6% and a median concentration of 0.7ng/L. Sulfadimidine (n.d-580.4ng/L) and doxycycline (n.d-82.2ng/L), with detection frequencies of 65.2% and 30.4%, respectively, were found at the same level as in rivers in North America, Spain, France, Australia, and in the Yangtze and Pearl Rivers of China, while the other target antibiotics were found at lower levels. According to the ratios of the measured environmental concentration to the predicted no-effect concentration, ofloxacin and doxycycline could present a medium to low ecological risk to algae, while sulfonamides posed no obvious ecological risk to the relevant aquatic organisms (algae, Daphnia magna, and fish). A high detection rate of antibiotics occurred in densely populated areas, revealing that population activities might be greatly contributing to the increasing levels of antibiotics in the area. Thus, the residues of antibiotics present in the waters of Hong Kong need to be closely monitored.
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Affiliation(s)
- Wenjing Deng
- Department of Science and Environmental Studies, The Hong Kong Institute of Education, Tai Po, NT, Hong Kong.
| | - Na Li
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China
| | - Hailong Zheng
- Department of Science and Environmental Studies, The Hong Kong Institute of Education, Tai Po, NT, Hong Kong
| | - Huiying Lin
- Department of Science and Environmental Studies, The Hong Kong Institute of Education, Tai Po, NT, Hong Kong
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18
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Lotfy HM, Hegazy MA, Mowaka S, Mohamed EH. Validated spectrophotometric methods for simultaneous determination of Omeprazole, Tinidazole and Doxycycline in their ternary mixture. Spectrochim Acta A Mol Biomol Spectrosc 2016; 153:321-332. [PMID: 26322842 DOI: 10.1016/j.saa.2015.07.106] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 07/22/2015] [Accepted: 07/29/2015] [Indexed: 06/04/2023]
Abstract
A comparative study of smart spectrophotometric techniques for the simultaneous determination of Omeprazole (OMP), Tinidazole (TIN) and Doxycycline (DOX) without prior separation steps is developed. These techniques consist of several consecutive steps utilizing zero/or ratio/or derivative spectra. The proposed techniques adopt nine simple different methods, namely direct spectrophotometry, dual wavelength, first derivative-zero crossing, amplitude factor, spectrum subtraction, ratio subtraction, derivative ratio-zero crossing, constant center, and successive derivative ratio method. The calibration graphs are linear over the concentration range of 1-20 μg/mL, 5-40 μg/mL and 2-30 μg/mL for OMP, TIN and DOX, respectively. These methods are tested by analyzing synthetic mixtures of the above drugs and successfully applied to commercial pharmaceutical preparation. The methods that are validated according to the ICH guidelines, accuracy, precision, and repeatability, were found to be within the acceptable limits.
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Affiliation(s)
- Hayam M Lotfy
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, 11562 Cairo, Egypt; Pharmaceutical chemistry department, Faculty of Pharmaceutical science and Pharmaceutical industries, Future University, 12311 Cairo, Egypt
| | - Maha A Hegazy
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, 11562 Cairo, Egypt
| | - Shereen Mowaka
- Analytical Chemistry Department, Faculty of Pharmacy, British University in Egypt, 11837 El-Sherouk City, Egypt; Analytical Chemistry Department, Faculty of Pharmacy, Helwan University, Ein Helwan, 11795 Cairo, Egypt
| | - Ekram Hany Mohamed
- Analytical Chemistry Department, Faculty of Pharmacy, British University in Egypt, 11837 El-Sherouk City, Egypt.
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19
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Tashkhourian J, Absalan G, Jafari M, Zare S. A rapid and sensitive assay for determination of doxycycline using thioglycolic acid-capped cadmium telluride quantum dots. Spectrochim Acta A Mol Biomol Spectrosc 2016; 152:119-125. [PMID: 26204505 DOI: 10.1016/j.saa.2015.07.063] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 06/24/2015] [Accepted: 07/12/2015] [Indexed: 05/20/2023]
Abstract
A rapid, simple and inexpensive spectrofluorimetric sensor for determination of doxycycline based on its interaction with thioglycolic acid-capped cadmium telluride quantum dots (TGA/CdTe QDs) has been developed. Under the optimum experimental conditions, the sensor exhibited a fast response time of <10s. The results revealed that doxycycline could quench the fluorescence of TGA/CdTe QDs via electron transfer from the QDs to doxycycline through a dynamic quenching mechanism. The sensor permitted determination of doxycycline in a concentration range of 1.9×10(-6)-6.1×10(-5)molL(-1) with a detection limit of 1.1×10(-7)molL(-1). The sensor was applied for determination of doxycycline in honey and human serum samples.
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Affiliation(s)
- Javad Tashkhourian
- Professor Massoumi Laboratory, Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran.
| | - Ghodratollah Absalan
- Professor Massoumi Laboratory, Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran
| | - Marzieh Jafari
- Professor Massoumi Laboratory, Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran
| | - Saber Zare
- Professor Massoumi Laboratory, Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran
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20
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Zaranyika MF, Dzomba P, Kugara J. Speciation and persistence of doxycycline in the aquatic environment: Characterization in terms of steady state kinetics. J Environ Sci Health B 2015; 50:908-918. [PMID: 26267779 DOI: 10.1080/03601234.2015.1067101] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The aim of the present work was to establish the kinetics for the degradation of doxycycline in the aquatic environment with a view to arriving at a kinetic model that can be used to predict the persistence of antibiotic with confidence. The degradation of doxycycline in both water and sediment phases of aquatic microcosm experiments, as well as in distilled water control experiments, was studied over a period of 90 days. An initial 21% loss due to adsorption by the sediment was observed in the microcosm experiment soon after charging. Biphasic zero-order linear rates of degradation, attributed to microbial degradation of the free and sediment or colloidal particle-adsorbed antibiotic, were observed for both water phase (2.3 × 10(-2) and 4.5 × 10(-3) μgg(-1) day(-1)) and sediment phase (7.9 × 10(-3) and 1.5 × 10(-3) μgg(-1) day(-1)) of the microcosm experiment. The covered distilled water control experiment exhibited a monophasic zero-order linear rate (1.9 × 10(-3) μgg(-1) day(-1)) attributed to hydrolysis, while the distilled water experiment exposed to natural light exhibited biphasic liner rates attributed to a combination of hydrolysis and photolysis (2.9 × 10(-3) μgg(-1) day(-1)) and to microbial degradation (9.8 × 10(-3) μgg(-1) day(-1)). A kinetic model that takes into account hydrolysis, photolysis, microbial degradation as well as sorption/desorption by colloidal and sediment particles is presented to account for the observed zero-order kinetics. The implications of the observed kinetics on the persistence of doxycycline in the aquatic environment are discussed.
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Affiliation(s)
- Mark F Zaranyika
- a Chemistry Department , Faculty of Science, University of Zimbabwe , Mount Pleasant, Harare , Zimbabwe
| | - Pamhidzai Dzomba
- a Chemistry Department , Faculty of Science, University of Zimbabwe , Mount Pleasant, Harare , Zimbabwe
| | - Jameson Kugara
- a Chemistry Department , Faculty of Science, University of Zimbabwe , Mount Pleasant, Harare , Zimbabwe
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21
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Phu TM, Phuong NT, Scippo ML, Dalsgaard A. Quality of Antimicrobial Products Used in Striped Catfish (Pangasianodon hypophthalmus) Aquaculture in Vietnam. PLoS One 2015; 10:e0124267. [PMID: 25897517 PMCID: PMC4405571 DOI: 10.1371/journal.pone.0124267] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Accepted: 03/12/2015] [Indexed: 11/19/2022] Open
Abstract
Antimicrobial usage is common in Asian aquaculture. This study aimed to determine the quality of antimicrobial products used by Vietnamese striped catfish (Pangasianodon hypophthalmus) farmers. Twenty one antimicrobial products (11 products contained a single antimicrobial and 10 products contained a mixture of two different antimicrobials) commonly used by catfish farmers were obtained from so-called chemical shops located in the Mekong Delta, Vietnam. Ultra High Performance Liquid Chromatography Mass Spectrometry was used to analyze concentration of sulfonamides, trimethoprim, amoxicillin, cefalexin and ciprofloxacin whereas concentrations of florfenicol and doxycycline were analyzed by High Performance Liquid Chromatography with UV detection. Results revealed that only 4/11 products with a single antimicrobial and 2/10 products with a mixture of antimicrobials contained active substances within ±10% of the concentration declared on the product label. Two products with antimicrobial mixtures did not contain any of the declared antimicrobials. Comparing two batches, analysis of 11 products revealed that only one product contained a concentration of active compound that varied with less than 10% in both batches. Several product labels provided inadequate information on how to calculate therapeutic dosage and further stated withdrawal time despite lack of pharmacokinetic data on the antimicrobials in catfish. There is an urgent need to strengthen approval procedures and in particular regularly to monitor the quality of antimicrobials used in Vietnamese aquaculture.
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Affiliation(s)
- Tran Minh Phu
- Department of Aquatic Nutrition and Products Processing, College of Aquaculture and Fisheries, Can Tho University, Can Tho, Vietnam
- Department of Veterinary Disease Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- * E-mail:
| | - Nguyen Thanh Phuong
- Department of Aquatic Nutrition and Products Processing, College of Aquaculture and Fisheries, Can Tho University, Can Tho, Vietnam
| | - Marie-Louise Scippo
- Department of Food Sciences, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - Anders Dalsgaard
- Department of Veterinary Disease Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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22
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Zhu J, Liu S, Liu Z, Li Y, Tian J, Hu X. A highly sensitive and selective assay of doxycycline by dualwavelength overlapping resonance Rayleigh scattering. Spectrochim Acta A Mol Biomol Spectrosc 2014; 124:237-242. [PMID: 24486868 DOI: 10.1016/j.saa.2013.12.114] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Revised: 12/27/2013] [Accepted: 12/30/2013] [Indexed: 06/03/2023]
Abstract
A dual-wavelength overlapping resonance Rayleigh scattering (DWO-RRS) method was developed and validated for highly sensitive and selective assay of doxycycline residues in several meat samples. The response signals were dependent on the specific multi-site coordination between lanthanum(III) and doxycycline (DOTC). And La(III)-DOTC complex would further aggregate to form [La(III)-DOTC]n nanoparticles, resulting in the occurrence of two new scattering peaks. Notably, with the addition of DOTC, the increments of both of these two wavelengths were proportional to the concentration of DOTC over the ranges of 3.9-4.0×10(3) nmol L(-1) (1.7-1.8×10(3) μg/kg). The detection limit of DWO-RRS was 1.1 nmol L(-1) (0.5 μg/kg), which was lower than or comparable to most of the published methods. Additionally, the generating mechanisms of multi-response RRS signals were discussed and a semi-empirical principle was established for better design of multi-response RRS probes.
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Affiliation(s)
- Jinghui Zhu
- Key Laboratory on Luminescence and Real-Time Analysis, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Shaopu Liu
- Key Laboratory on Luminescence and Real-Time Analysis, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Zhongfang Liu
- Key Laboratory on Luminescence and Real-Time Analysis, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Yuanfang Li
- Key Laboratory on Luminescence and Real-Time Analysis, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Jing Tian
- Key Laboratory on Luminescence and Real-Time Analysis, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Xiaoli Hu
- Key Laboratory on Luminescence and Real-Time Analysis, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
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23
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Gao F, Zhao GX, Zhang HC, Wang P, Wang JP. Production of monoclonal antibody against doxycycline for immunoassay of seven tetracyclines in bovine muscle and milk. J Environ Sci Health B 2013; 48:92-100. [PMID: 23305276 DOI: 10.1080/03601234.2013.726856] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The objective of this study was to produce a generic monoclonal antibody for multi-determination of the residues of tetracycline drugs in bovine muscle and milk. Two new immunogens of doxycycline were prepared that were used to produce the monoclonal antibodies. Results showed the obtained antibodies simultaneously recognized seven tetracycline drugs (doxycycline, tetracycline, chlortetracycline, oxytetracycline, minocycline, methacycline, demeclocycline). The obtained antibodies and three coating antigens were arranged into six combinations to optimize the reagents combination. After comparison of the performances of these combinations, a heterologous indirect competitive ELISA was then used to determine the seven tetracyclines in bovine muscle and milk. The crossreactivities to the seven analytes were in the range of 47%-102% and the limits of detection were in the range of 1.5-6.9 ng/mL depending on the compound. The recoveries of the seven drugs from fortified blank samples were in the range of 75.3%-106.8% with coefficients of variation lower than 10.9%. Therefore, this method could be used as a multi-analytes screen tool for routine monitoring of the residues of these tetracycline drugs in bovine muscle and milk.
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Affiliation(s)
- Feng Gao
- College of Veterinary Medicine, Agricultural University of Hebei, Baoding Hebei, China
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24
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Adrian J, Fernández F, Sánchez-Baeza F, Marco MP. Preparation of antibodies and development of an enzyme-linked immunosorbent assay (ELISA) for the determination of doxycycline antibiotic in milk samples. J Agric Food Chem 2012; 60:3837-3846. [PMID: 22486559 DOI: 10.1021/jf2053355] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This paper reports the development of an immunoassay for the specific analysis of doxycycline (DC), a congener of the tetracycline antibiotic family (TCs), in milk samples. This is the first time that DC antibody production is reported, based on a rationally designed and well-characterized immunizing hapten. The chemical structure of the immunizing hapten (13-[(2-carboxyethyl)thiol]-5-hydroxy-6-α-deoxytetracycline, TC1) was designed to maximize recognition of the tetracycline characteristic moiety defined as lower periphery of the TCs plus the region of the upper periphery composed by the hydroxyl group at position C(5) (B ring) and the dimethylamino group in ring A. Polyclonal antibodies raised against TC1 coupled to horseshoe crab hemocianyn (HCH) were used to develop a homologous indirect competitive enzyme-linked immunosorbent assay (ELISA). The microplate ELISA can detect DC in buffer down to 0.1 μg L(-1). The ELISA has been proven to tolerate a wide range of ionic strengths and pH values. The assay is very selective for DC with a minor recognition of methacycline (32% of cross-reactivity). Experiments performed with whole milk samples demonstrate that samples can be directly analyzed after a simple treatment method, reaching detectability values below 5 μg L(-1).
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Affiliation(s)
- Javier Adrian
- Applied Molecular Receptors Group, Department of Chemical and Biomolecular Nanotechnology, Institute for Advanced Chemistry of Catalonia, Spanish Council for Scientific Research, Jordi Girona 18-26, Barcelona, Spain
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25
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Abstract
Doxycycline has been used in continually increasing quantities for mass treatment of food animals because of its greater bioavailability relative to older tetracyclines. The study presented in this paper was undertaken to investigate the degradation rate of the tetracycline derivative in manure-amended soil. In the present experiment, following composting, the doxycycline-contaminated manure was applied to agricultural land, and a field study was performed to investigate the degradation rate of doxycycline in soil. By the end of the 20-week sampling period, about 20 %, 33 % and 18 % of the initial doxycycline concentrations could be measured in soil samples taken at three different soil depths. The calculated half-life of doxycycline in the soil was 66.5, 76.3 and 59.4 days at depths of 0 cm, 25 cm and 50 cm, respectively. The potential effect of doxycycline on soil microbial activity was demonstrated by the nitrogen transformation test performed in compliance with the Organisation for Economic Co-operation and Development (OECD) Guideline No. 216. On day 28, the following nitrate concentrations of the control soil sample were found in the soil samples treated with different amounts of doxycycline: 76.9 %, 53.0 %, 65.6 %, 59.7 % and 77.1 %.
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Affiliation(s)
- István Szatmári
- Department of Food Hygiene, Faculty of Veterinary Science, Szent István University, Budapest, Hungary.
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26
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Hijosa-Valsero M, Fink G, Schlüsener MP, Sidrach-Cardona R, Martín-Villacorta J, Ternes T, Bécares E. Removal of antibiotics from urban wastewater by constructed wetland optimization. Chemosphere 2011; 83:713-719. [PMID: 21356542 DOI: 10.1016/j.chemosphere.2011.02.004] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2010] [Revised: 02/01/2011] [Accepted: 02/01/2011] [Indexed: 05/28/2023]
Abstract
Seven mesocosm-scale constructed wetlands (CWs), differing in their design characteristics, were set up in the open air to assess their efficiency to remove antibiotics from urban raw wastewater. A conventional wastewater treatment plant (WWTP) was simultaneously monitored. The experiment took place in autumn. An analytical methodology including HPLC-MS/MS was developed to measure antibiotic concentrations in the soluble water fraction, in the suspended solids fraction and in the WWTP sludge. Considering the soluble water fraction, the only easily eliminated antibiotics in the WWTP were doxycycline (61±38%) and sulfamethoxazole (60±26%). All the studied types of CWs were efficient for the removal of sulfamethoxazole (59±30-87±41%), as found in the WWTP, and, in addition, they removed trimethoprim (65±21-96±29%). The elimination of other antibiotics in CWs was limited by the specific system-configuration: amoxicillin (45±15%) was only eliminated by a free-water (FW) subsurface flow (SSF) CW planted with Typha angustifolia; doxycycline was removed in FW systems planted with T. angustifolia (65±34-75±40%), in a Phragmites australis-floating macrophytes system (62±31%) and in conventional horizontal SSF-systems (71±39%); clarithromycin was partially eliminated by an unplanted FW-SSF system (50±18%); erythromycin could only be removed by a P. australis-horizontal SSF system (64±30%); and ampicillin was eliminated by a T. angustifolia-floating macrophytes system (29±4%). Lincomycin was not removed by any of the systems (WWTP or CWs). The presence or absence of plants, the vegetal species (T. angustifolia or P. australis), the flow type and the CW design characteristics regulated the specific removal mechanisms. Therefore, CWs are not an overall solution to remove antibiotics from urban wastewater during cold seasons. However, more studies are needed to assess their ability in warmer periods and to determine the behaviour of full-scale systems.
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Affiliation(s)
- María Hijosa-Valsero
- Facultad de Ciencias Biológicas y Ambientales, Universidad de León, Campus de Vegazana s/n, 24071 León, Spain.
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27
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Walters E, McClellan K, Halden RU. Occurrence and loss over three years of 72 pharmaceuticals and personal care products from biosolids-soil mixtures in outdoor mesocosms. Water Res 2010; 44:6011-20. [PMID: 20728197 PMCID: PMC2991390 DOI: 10.1016/j.watres.2010.07.051] [Citation(s) in RCA: 217] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2009] [Revised: 07/08/2010] [Accepted: 07/19/2010] [Indexed: 05/19/2023]
Abstract
Municipal biosolids are in widespread use as additives to agricultural soils in the United States. Although it is well known that digested sewage sludge is laden with organic wastewater contaminants, the fate and behavior of micropollutants in biosolids-amended agricultural soils remain unclear. An outdoor mesocosm study was conducted in Baltimore, Maryland, to explore the fate of 72 pharmaceuticals and personal care products (PPCPs) over the course of three years in that were placed in plastic containers made from polyvinylchloride and kept exposed to ambient outdoor conditions. Of the 72 PPCPs tested for using EPA Method 1694, 15 were initially detected in the soil/biosolids mixtures at concentrations ranging from low parts-per-billion to parts-per-million levels. The antimicrobials triclocarban and triclosan showed the highest initial concentrations at 2715 and 1265 μg kg(-1), respectively. Compounds showing no discernable loss over three years of monitoring included diphenhydramine, fluoxetine, thiabendazole and triclocarban. The following half-life estimates were obtained for compounds showing first-order loss rates: azithromycin (408-990 d) carbamazepine (462-533 d), ciprofloxacin (1155-3466 d), doxycycline (533-578 d), 4-epitetracycline (630 d), gemfibrozil (224-231 d), norfloxacin (990-1386 d), tetracycline (578 d), and triclosan (182-193 d). Consistent with other outdoor degradation studies, chemical half-lives determined empirically exceeded those reported from laboratory studies or predicted from fate models. Study results suggest that PPCPs shown in the laboratory to be readily biotransformable can persist in soils for extended periods of time when applied in biosolids. This study provides the first experimental data on the persistence in biosolids-amended soils for ciprofloxacin, diphenhydramine, doxycycline, 4-epitetracycline, gemfibrozil, miconazole, norfloxacin, ofloxacin, and thiabendazole.
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Affiliation(s)
- Evelyn Walters
- Center for Environmental Biotechnology, The Biodesign Institute at Arizona State University, Tempe, AZ 85287
| | - Kristin McClellan
- Center for Environmental Biotechnology, The Biodesign Institute at Arizona State University, Tempe, AZ 85287
| | - Rolf U. Halden
- Center for Environmental Biotechnology, The Biodesign Institute at Arizona State University, Tempe, AZ 85287
- Corresponding author: Rolf U. Halden, Center for Environmental Biotechnology, The Biodesign Institute at Arizona State University, 1001 S. McAllister Avenue, Tempe, AZ 85287-5701, Tel.: 480-727-0893, Fax: 480-727-0889,
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Abstract
REASONS FOR PERFORMING STUDY Tetracycline compounds have been used to slow the progression of osteoarthritis (OA) and rheumatoid arthritis but the concentration of doxycycline attained in synovial fluid following oral, low-dose administration has yet to be determined. OBJECTIVE To determine the concentration of doxycycline in synovial fluid following oral, low-dose administration. METHODS Six mature horses received doxycycline (5 mg/kg bwt q. 12 h for 5 doses). Venous blood and synovial fluid samples were collected at t=0, 0.25, 0.5, 1, 12, 24, 48 and 72 h. Doxycycline concentrations were measured using reverse phase high pressure liquid chromatography with ultraviolet detection. RESULTS Doxycycline concentrations at all time points after t=0 were above the lower limit of quantification for the assay. Plasma concentrations of doxycycline were above 0.21 microg/ml at t=0.5 h. The mean+/-s.d. peak concentration (Cmax) of doxycycline in plasma was 0.37+/-0.22 microg/ml and time to peak concentration was 0.54+/-0.19 h. Synovial fluid concentrations of doxycycline were above 0.12 microg/ml 1 h after drug administration. The mean Cmax of doxycycline in the synovial fluid was 0.27+/-0.10 microg/ml. The penetration factor of doxycycline from plasma into synovial fluid, as determined by a ratio of the area-under-the-curve for synovial fluid:plasma during the sampling period, was 4.6. POTENTIAL RELEVANCE Orally administered doxycycline distributes easily into synovial fluid with a penetration factor of 4.6. Terminal half-life of the drug in synovial fluid was longer than in the plasma, indicating possible accumulation in this compartment. Further in vivo studies are warranted to define a medication protocol prior to routine clinical use of doxycycline for the treatment of OA.
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Affiliation(s)
- L V Schnabel
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York 14853, USA
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29
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Zhou YM, Zhang CL, Lei JD, Ma TS, Ma GH, Su ZG, Chao Y. [Molecular imprinting-flow injection chemiluminescence method for determination of doxycycline hydrochloride]. Guang Pu Xue Yu Guang Pu Fen Xi 2009; 29:1745-1749. [PMID: 19798931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Doxycycline hydrochloride can enhance the chemiluminescence of potassium ferricyanide and luminol in alkaline medium. So a molecular imprinting-flow-injection chemiluminescence method for the determination of doxycycline hydrochloride was established by using doxycycline hydrochloride-imprinted polymers as recognition material and potassium ferricyanide and luminol as detection system. Doxycycline hydrochloride-imprinted polymer was synthesized using methacrylic acid as functional monomer and ethylene glycol dimethacrylate as cross-linker. The linear range is 9.0 x 10(-7)-6.0 x 10(-5) g x mL(-1) and the detection limit is 3.2 x 10(-7) g x mL(-1). The relative standard deviation for 6.0 X 10(-6) g x mL(-1) of doxycycline hydrochloride was 3.5% (n = 9). This method has been successfully applied to the determination of doxycycline hydrochloride in tablets and in urine samples.
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Affiliation(s)
- Yan-Mei Zhou
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China.
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30
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Hadad GM, El-Gindy A, Mahmoud WMM. HPLC and chemometrics-assisted UV-spectroscopy methods for the simultaneous determination of ambroxol and doxycycline in capsule. Spectrochim Acta A Mol Biomol Spectrosc 2008; 70:655-663. [PMID: 17931962 DOI: 10.1016/j.saa.2007.08.016] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2007] [Revised: 08/16/2007] [Accepted: 08/27/2007] [Indexed: 05/25/2023]
Abstract
High-performance liquid chromatography (HPLC) and multivariate spectrophotometric methods are described for the simultaneous determination of ambroxol hydrochloride (AM) and doxycycline (DX) in combined pharmaceutical capsules. The chromatographic separation was achieved on reversed-phase C(18) analytical column with a mobile phase consisting of a mixture of 20mM potassium dihydrogen phosphate, pH 6-acetonitrile in ratio of (1:1, v/v) and UV detection at 245 nm. Also, the resolution has been accomplished by using numerical spectrophotometric methods as classical least squares (CLS), principal component regression (PCR) and partial least squares (PLS-1) applied to the UV spectra of the mixture and graphical spectrophotometric method as first derivative of the ratio spectra ((1)DD) method. Analytical figures of merit (FOM), such as sensitivity, selectivity, analytical sensitivity, limit of quantitation and limit of detection were determined for CLS, PLS-1 and PCR methods. The proposed methods were validated and successfully applied for the analysis of pharmaceutical formulation and laboratory-prepared mixtures containing the two component combination.
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Affiliation(s)
- Ghada M Hadad
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt.
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Vega D, Agüí L, González-Cortés A, Yáñez-Sedeño P, Pingarrón JM. Voltammetry and amperometric detection of tetracyclines at multi-wall carbon nanotube modified electrodes. Anal Bioanal Chem 2007; 389:951-8. [PMID: 17671781 DOI: 10.1007/s00216-007-1505-7] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2007] [Revised: 07/03/2007] [Accepted: 07/11/2007] [Indexed: 11/25/2022]
Abstract
The voltammetric behaviour and amperometric detection of tetracycline (TC) antibiotics at multi-wall carbon nanotube modified glassy carbon electrodes (MWCNT-GCE) are reported. Cyclic voltammograms of TCs showed enhanced oxidation responses at the MWCNT-GCE with respect to the bare GCE, attributable to the increased active electrode surface area. Hydrodynamic voltammograms obtained by flow-injection with amperometric detection at the MWCNT-GCE led us to select a potential value E(det) = +1.20 V. The repeatability of the amperometric responses was much better than that achieved with bare GCE (RSD ranged from 7 to 12%), with RSD values for i (p) of around 3%, thus demonstrating the antifouling capability of MWCNT modified electrodes. An HPLC method with amperometric electrochemical detection (ED) at the MWCNT-GCE was developed for tetracycline, oxytetracycline (OTC), chlortetracycline and doxycycline (DC). A mobile phase consisting of 18:82 acetonitrile/0.05 mol L(-1) phosphate buffer of pH 2.5 was selected. The limits of detection ranged from 0.09 micromol L(-1) for OTC to 0.44 micromol L(-1) for DC. The possibility to carry out multiresidue analysis is demonstrated. The HPLC-ED/MWCNT-GCE method was applied to the analysis of fish farm pool water and underground well water samples spiked with the four TCs at 2.0 x 10(-7) mol L(-1). Solid-phase extraction was accomplished for the preconcentration of the analytes and clean-up of the samples. Recoveries ranged from 87 +/- 6 to 99 +/- 3%. Under preconcentration conditions, limits of detection in the water samples were between 0.50 and 3.10 ng mL(-1).
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Affiliation(s)
- D Vega
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040 Madrid, Spain
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Injac R, Kac J, Kreft S, Strukelj B. Determination of doxycycline in pharmaceuticals and human urine by micellar electrokinetic capillary chromatography. Anal Bioanal Chem 2006; 387:695-701. [PMID: 17102968 DOI: 10.1007/s00216-006-0900-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2006] [Revised: 09/18/2006] [Accepted: 10/02/2006] [Indexed: 11/25/2022]
Abstract
Micellar electrokinetic capillary chromatography (MEKC) was performed at 25 degrees C and 30 kV (under a pressure of 15 mbar), using 30 mM borate buffer containing 60 mM sodium dodecysulfate (SDS) and 5% (v/v) methanol as background electrolyte (pH 9.0) to determine doxycycline. UV detection was at 350 nm. The method was shown to be specific, accurate (recovery was 100.3 +/- 1.0%), linear over the tested range (correlation coefficient 0.9995) and precise (RSD <1.9%). The method was used to determine doxycycline in tablets, capsules and human urine after oral application.
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Affiliation(s)
- Rade Injac
- Institute of Pharmaceutical Biology, Faculty of Pharmacy, University of Ljubljana, Askerceva 7, 1000, Ljubljana, Slovenia.
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Wei X, Liu Z, Liu S. Resonance Rayleigh scattering spectra of tetracycline antibiotic–Cu(II)–titan yellow systems and their applications in analytical chemistry. Anal Bioanal Chem 2006; 385:1039-44. [PMID: 16736168 DOI: 10.1007/s00216-006-0499-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2006] [Accepted: 04/20/2006] [Indexed: 10/24/2022]
Abstract
Tetracycline antibiotics (TCs) such as doxycycline (DOTC), chlortetracycline (CTC), oxytetracycline (OTC), and tetracycline (TC) react with Cu(II) in pH 3.5 BR buffer medium to form 1:1 cationic chelates, which further react with titan yellow to form 2:1 ion association complexes. These result in great enhancement of resonance Rayleigh scattering (RRS) and the appearance of new RRS spectra. The ion association complexes of DOTC, CTC, OTC, and TC have similar spectral characteristics and their maximum RRS wavelengths are all located at 464 nm. The quantitative determination ranges and the detection limits (3sigma) of the four TCs are 0.037-4.8 microg mL(-1) and 11.2 ng mL(-1) for DOTC, 0.041-5.2 microg mL(-1) and 12.4 ng mL(-1) for CTC, 0.050-4.8 microg mL(-1) and 15.1 ng mL(-1) for TC, and 0.088-5.0 microg mL(-1) and 26.3 ng mL(-1) for OTC, respectively. The optimum reaction conditions, the effects of foreign substances, the structure of ternary complexes, and the reaction mechanism are discussed. A sensitive, rapid, and simple RRS method for the determination of DOTC has been developed.
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Affiliation(s)
- Xiaoqin Wei
- School of Chemistry and Chemical Engineering, Southwest University, 400715 Chongqing, People's Republic of China
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Fiori J, Grassigli G, Filippi P, Gotti R, Cavrini V. HPLC-DAD and LC-ESI-MS analysis of doxycycline and related impurities in doxipan mix, a medicated premix for incorporation in medicated feedstuff. J Pharm Biomed Anal 2006; 37:979-85. [PMID: 15862676 DOI: 10.1016/j.jpba.2004.06.017] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2004] [Revised: 06/25/2004] [Accepted: 06/25/2004] [Indexed: 10/26/2022]
Abstract
HPLC-DAD and LC-ESI-MS methods have been developed for the analysis of doxycycline (DOX), including the identification of the related impurities metacycline (MTC) and 6-epidoxycycline (EDOX) and its determination in a medicated premix. The chromatographic separations have been performed on Luna C18 stationary phase and on Synergi (4 microm) Polar-RP 80A, using both acidic (pH 2.5) and basic (pH 8.0) mobile phases. The Synergi Polar-RP column, in combination with a mobile phase of oxalic acid (0.02 M; pH 2.5)-acetonitrile 82:18 (v/v), allowed the complete separation of MTC, EDOX and DOX. The same separation was also obtained using Luna C18 stationary phase with a pH 8 mobile phase. Application of a LC-ESI-MS system and MS/MS analysis, using both positive and negative polarity, allowed the peak identity to be confirmed. A method based on Luna C18 column and UV detection at 346 nm was validated for the determination of DOX in a medicated premix for incorporation in medicated feedstuff.
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Affiliation(s)
- J Fiori
- Dipartimento di Scienze Farmaceutiche, Alma Mater Studiorum-Università di Bologna, via Belmeloro 6, 40126 Bologna, Italy
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Abstract
OBJECTIVE To investigate intraocular penetration of orally administered doxycycline in the normal equine eye and to compare intraocular and serum doxycycline concentrations. Procedures Six mares were administered doxycycline at 10 mg/kg every 12 h by nasogastric tube for 5 days. Blood, aqueous, and vitreous samples were collected on days 1 and 5. All samples were assayed for doxycycline concentrations. Aqueous and vitreous samples were also assayed for protein quantitation. RESULTS Doxycycline was rapidly absorbed after the first dose (T(max) value of 1.42 +/- 1.28 h); and elimination of doxycycline occurred slowly (median t(1/2) = 10.88 h). Doxycycline could not be detected in the aqueous on days 1 and 5, nor could it be detected in the vitreous on day 1. On day 5, the mean vitreous doxycycline concentration was 0.17 +/- 0.04 microg/mL at 2 h after drug administration. CONCLUSIONS Repeated oral administration of doxycycline in the horse resulted in steady state serum concentrations of < 1 microg/mL; however, it did not result in appreciable concentrations of drug in the aqueous and vitreous in normal eyes.
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Affiliation(s)
- Margi A Gilmour
- Veterinary Clinical Sciences, College of Veterinary Medicine, Oklahoma State University, Stillwater, OK, USA.
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Brain RA, Wilson CJ, Johnson DJ, Sanderson H, Bestari KJ, Hanson ML, Sibley PK, Solomon KR. Effects of a mixture of tetracyclines to Lemna gibba and Myriophyllum sibiricum evaluated in aquatic microcosms. Environ Pollut 2005; 138:425-42. [PMID: 15996801 DOI: 10.1016/j.envpol.2005.04.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2004] [Accepted: 04/22/2005] [Indexed: 05/03/2023]
Abstract
The impact of a mixture of oxytetracycline, chlortetracycline, tetracycline and doxycycline on Myriophyllum sibiricum and Lemna gibba was investigated using fifteen 12,000-L microcosms (k=5, n=3). Significant concentration-response relationships were only found for M. sibiricum, where dry mass was 69, 47, 30, and 7% of controls at respective treatment concentrations of 0.080, 0.218, 0.668, and 2.289 micromol/L. Somatic endpoints were strongly and negatively correlated with percent light transmission, except plant length, which was positively correlated. Treated microcosms experienced a reduction in the percent of surface irradiance penetrating the water column as high as 99.8% at a depth of 70 cm, relative to controls. Position relative to the water column was likely responsible for the differential effects observed between floating (L. gibba) and submerged (M. sibiricum) species of macrophytes. A hazard quotient assessment of the lowest EC10 value indicated significant risk, exceeding the critical HQ value, but not the lowest EC25 value.
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Affiliation(s)
- Richard A Brain
- Centre for Toxicology, Department of Environmental Biology, University of Guelph, Guelph, Ontario, Canada N1G 2W1.
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37
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Khong SP, Hammel YA, Guy PA. Analysis of tetracyclines in honey by high-performance liquid chromatography/tandem mass spectrometry. Rapid Commun Mass Spectrom 2005; 19:493-502. [PMID: 15655801 DOI: 10.1002/rcm.1814] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A confirmatory method coupling liquid chromatography to tandem mass spectrometry (LC/MS/MS) is described for the determination of tetracycline, oxytetracycline, doxycycline and chlortetracycline in honey. Demeclocycline, another tetracycline molecule not reported for its usage in honey, was used as internal standard to quantify the four analytes. The sample preparation entails a clean-up on an Oasis HLB solid-phase extraction cartridge and analyses were realised by LC/MS/MS in selected reaction monitoring mode. The stability of tetracyclines was checked under various storage conditions at -20, +4 and +20 degrees C (both under dark and light exposures). Indeed, tetracyclines are not stable molecules and the epimerisation phenomenon was evaluated in this work. Appropriate correction factors of the MS/MS responses of each epimer were studied for each of the four tetracyclines to accurately quantify them. Moreover, the matrix effects encountered during the LC/MS/MS analyses were also studied in spiked experiments from blank honey samples of various geographical origins and different flower types.
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Affiliation(s)
- Seu-Ping Khong
- Nestlé Research Center, Nestec Ltd., Vers-Chez-Les-Blanc, 1000 Lausanne 26, Switzerland
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Jiang CQ, Zhang N. Enzyme-amplified lanthanide luminescence based on complexation reaction—a new technique for the determination of doxycycline. J Pharm Biomed Anal 2004; 35:1301-6. [PMID: 15336376 DOI: 10.1016/j.jpba.2004.04.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2004] [Revised: 04/07/2004] [Accepted: 04/13/2004] [Indexed: 10/26/2022]
Abstract
A new spectrofluorimetric method is described for the determination of doxycycline, based on modified enzyme-amplified lanthanide luminescence. Under the optimum conditions, Eu(3+)-doxycycline forms a ternary complex with lysozyme in close proximity and lysozyme can remarkably enhance the characteristic fluorescence intensity of Eu(3+) at 612nm in doxycycline-Eu(3+) binary complex. The enhanced fluorescence intensity is in proportion to the concentration of doxycycline. The limit of detection is 1.28 x 10(-8) moll(-1), with a linear range from 1.7 x 10(-7) to 1.7 x 10(-6) moll(-1). Interferences of other coexisting substances were studied. The developed method was successfully applied to the determination of doxycycline in serum, urine and real samples. The mechanism of fluorescence enhancement was also studied.
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Affiliation(s)
- Chong Qiu Jiang
- Department of Chemistry, Shandong Normal University, Jinan 250014, China.
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Li NB, Duan JP, Chen HQ, Chen GN. [Flow injection analysis of trace amounts of doxycycline with inhibited chemiluminescence detection]. Guang Pu Xue Yu Guang Pu Fen Xi 2004; 24:15-17. [PMID: 15768965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A novel flow injection chemiluminescence method has been developed for the determination of doxycycline (DC) based on the inhibition of chemiluminescence reaction of Luminol-KMnO4 by using DC in sodium hydroxide medium. Using different concentrations of KMnO4, a series of good linear regression equations of decreased chemiluminescence intensity and the concentration of DC were obtained with different subsections in the concentration range of 0.005-5.0 microg x mL(-1). The detection limit (3sigma) is 2.0 x 10(-3) microg x mL(-1). The method has been successfully applied to the determination of DC in a pharmaceutical preparation.
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Affiliation(s)
- Nain-bing Li
- College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350002, China
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40
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Abstract
A simple HPLC method for the separation of doxycycline and its degradation products 6-epidoxycycline and metacycline was developed. Numerous HPLC conditions were tested for the qualitative determination of doxycycline and its degradation products. The best result was achieved by using Phenomenex Luna 5 microm C(8) 250 x 4.6 mm column with a Phenomenex(R) C(8) 4 x 10 mm I.D. guard column, and a mobile phase consisting of acetonitrile:water:perchloric acid (HClO(4)) (26:74:0.25) adjusted to pH 2.5 with 5 M sodium hydroxide, a flow-rate of 1.0 ml/min and ultraviolet detection at 350 nm. Correlation coefficients for calibration curves within the detection range of 3-60 microl/ml were 0.9990 for doxycycline and 1.000 and 0.9994 for 6-epidoxycycline and metacycline, respectively (within the range 0.5-7 microl/ml). The resolution between metacycline and 6-epidoxycycline was 1.2 and between 6-epidoxycycline and doxycycline it was 1.9 which fulfils European Pharmacopoeia requirements. The within- and between-day precision was determined for both retention time and peak area. Preliminary results indicate that this method can also be applied for separating other tetracyclines such as minocycline, chlortetracycline, tetracycline and demeclocycline.
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Affiliation(s)
- S Skúlason
- Faculty of Pharmacy, University of Iceland, Hagi, Hofsvallagotu 53, IS-107 Reykjavík, Iceland.
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Cinquina AL, Longo F, Anastasi G, Giannetti L, Cozzani R. Validation of a high-performance liquid chromatography method for the determination of oxytetracycline, tetracycline, chlortetracycline and doxycycline in bovine milk and muscle. J Chromatogr A 2003; 987:227-33. [PMID: 12613816 DOI: 10.1016/s0021-9673(02)01446-2] [Citation(s) in RCA: 186] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
High-performance liquid chromatography with diode-array detection (HPLC-DAD) was optimised and validated for the determination of tetracyclines in bovine milk and tissues. Milk and tissue samples were extracted and purified using a solid-phase extraction HLB Oasis cartridge and analysed using HPLC-DAD set at 365 nm. The analyses were carried out using the mobile phase of 0.01 M oxalic acid-acetonitrile-methanol (60:25:15, v/v/v) on a C8 column (250 x 4.6 mm I.D., 5 microm). Recoveries of tetracyclines from spiked samples at the three concentrations (0.5, 1 and 1.5) of the maximum residues limits (corresponding to 100 microg/kg for milk and the muscle) were higher than 81.1% in milk and 83.2% in muscle. The method was successfully validated for bovine milk and muscle in compliance with requirements set by draft SANCO/ 1805/ 2000 European Decision. The decision limit (CCalpha) was in the range 113.2-127.2 microg/kg and 107.7-129.9 micro/kg for all compounds in milk and muscle, respectively. The detection capability (CCbeta) was in the range 117.2-131.3 microg/kg and 114.9-133.1 microg/kg for all compounds in milk and muscle, respectively.
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Affiliation(s)
- A L Cinquina
- Istituto Zooprofilattico Sperimentale delle Regioni Lazio e Toscana, Via Appia Nuova 1411, 00178 Rome, Italy.
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Abstract
Carbazole is a promising pharmaceutical species. A novel optical sensor for determining doxycycline based on the fluorescence quenching of N-allylcarbazole immobilized on an quartz glass plate surface by covalent bonding has been described. The sensor shows satisfactory virtues in reversibility, repeatability, selectivity and sufficient lifetime resulting from its excellent optode membrane. Its response time is less than 60 s. The determination range and detection limit of the sensor are 6.0 x 10(-7)-2.0 x 10(-3) M and 2.0 x 10(-7) M, respectively. The lifetime of each sensor is at least three to four months. The sensor can be used for direct determination of doxycycline in pharmaceutical preparations and urine samples.
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Affiliation(s)
- Li-Xin Chen
- State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P R. China
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Axisa B, Loftus IM, Naylor AR, Goodall S, Jones L, Bell PRF, Thompson MM. Prospective, randomized, double-blind trial investigating the effect of doxycycline on matrix metalloproteinase expression within atherosclerotic carotid plaques. Stroke 2002; 33:2858-64. [PMID: 12468782 DOI: 10.1161/01.str.0000038098.04291.f6] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND AND PURPOSE Elevated levels of matrix metalloproteinases (MMPs), particularly MMP-1 and MMP-9, have been implicated in plaque rupture. It has been suggested that inhibition of MMPs may stabilize vulnerable atherosclerotic plaques and improve clinical outcome. The aim of the study was to investigate the ability of doxycycline, a nonspecific MMP inhibitor, to reduce MMP concentration in carotid atheroma. METHODS The study design was a prospective, double-blind randomized trial. One hundred patients requiring carotid endarterectomy were randomized to receive 200 mg/d doxycycline or placebo for 2 to 8 weeks before surgery. During endarterectomy, carotid plaques were retrieved. The concentrations of MMPs and doxycycline were determined in the atherosclerotic tissue by enzyme-linked immunosorbent assay and high-performance liquid chromatography, respectively. Clinical events were recorded, as was the rate of preoperative embolization (transcranial Doppler). RESULTS Analysis of endarterectomized specimens demonstrated a mean doxycycline concentration of 6.0 micro g/g wet weight in treated patients. Administration of doxycycline significantly reduced the concentration of MMP-1 in carotid plaques from a mean of 14.8 to 10.3 ng/100g wet weight (P=0.038). This difference was due to decreased MMP-1 transcript (P<0.001). There was no difference in any other MMP (MMP-2, -3, or -9) or tissue inhibitor of matrix metalloproteinases-1 or -2. CONCLUSIONS Doxycycline penetrated atherosclerotic plaques with acceptable tissue levels. This resulted in a reduction in MMP-1 concentration because of decreased expression.
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Affiliation(s)
- Benedict Axisa
- Department of Surgery, University of Leicester, Leicester, UK
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Kim TS, Bürklin T, Schacher B, Ratka-Krüger P, Schaecken MT, Renggli HH, Fiehn W, Eickholz P. Pharmacokinetic profile of a locally administered doxycycline gel in crevicular fluid, blood, and saliva. J Periodontol 2002; 73:1285-91. [PMID: 12479632 DOI: 10.1902/jop.2002.73.11.1285] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND With the help of so-called controlled release delivery systems, the half-life period of locally administered antibiotics in gingival crevicular fluid (GCF) can be extended significantly. The aim of this study was to characterize the delivery profile of a new one-component 14% doxycycline free amine gel for local application. Pharmacokinetics of doxycycline (DOXY) were analyzed in GCF, saliva, and serum. METHODS Twenty patients with persisting or recurring pockets (probing depths > or = 5 mm and bleeding on probing) after mechanical treatment (surgical or non-surgical) took part in the study. In each patient 1 periodontal defect was treated with DOXY gel. Samples of GCF, saliva, and serum were obtained before application of DOXY gel; 15 minutes after application; at 2 and 5 hours; and at 1, 2, 3, 4, 7, 9, and 11 days after application. Separation and quantitative measurement of DOXY was performed with high performance liquid chromatography and UV detection at lambda = 260 nm. RESULTS Coefficients of variation were lower than 2% (intraassay) and 4% (interassay), respectively. For concentrations between 50 to 1000 microg/ml, we found a linear relationship between expected and measured DOXY values (linear coefficient of correlation: r = 0.998). Within the first 5 hours after application, concentration of DOXY in GCF (maximum after 15 minutes 19.97 +/- 5.85 mg/ml) and saliva (maximum after 15 minutes 17.83 +/- 2.84 mg/ml) was similar. Then concentration fell to a lower level (28.90 +/- 19.44 microg/ml) compared to GCF (577.41 +/- 127.34 microg/ml) after 3 days. Up to 10 days after application, the concentration of DOXY in GCF was 34.24 microg/ml. With the exception of 1 patient, all serum samples were DOXY-negative. CONCLUSIONS 1) After subgingival application of biodegradable 14% doxycycline gel, mean doxycycline levels in GCF that exceeded 16 microg/ml could be maintained for at least 12 days. Thus, the antimicrobial agent may be classified as a controlled release device. 2) The antibiotic effect was limited mainly to the subgingival sites of application of the doxycycline gel. 3) The doxycycline gel possesses the pharmacokinetic and clinical properties to deliver efficacious levels of antibiotics to the periodontal pocket and to maintain these levels for at least 1 week without the need of further drug retention by a periodontal dressing.
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Affiliation(s)
- Ti-Sun Kim
- Department of Operative Dentistry and Periodontology, Section of Periodontology, University Dental Clinic, Ruprecht-Karls-University Heidelberg, Heidelberg, Germany.
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Böhm M, Schmidt PF, Lödding B, Uphoff H, Westermann G, Luger TA, Bonsmann G, Metze D. Cutaneous hyperpigmentation induced by doxycycline: histochemical and ultrastructural examination, laser microprobe mass analysis, and cathodoluminescence. Am J Dermatopathol 2002; 24:345-50. [PMID: 12142617 DOI: 10.1097/00000372-200208000-00012] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Skin hyperpigmentation induced by minocycline is a well-recognized side effect of minocycline but has rarely been reported for other tetracyclines. Based on a previously reported unusual case of chronic doxycycline abuse in a psychotic patient, we have investigated the nature of the observed pigment changes in the same patient. Histopathologic investigation of lesional skin by light microscopy disclosed hyperpigmentation of the basal keratinocytes and pigment-laden histiocytes in the dermis and subcutaneous fat. Only the pigment in the histiocytes of the upper dermis was reactive for Fontana Masson stain and could be bleached by hydrogen peroxide. The other histiocytes contained iron and calcium deposits as shown by von Kossa and Perls staining as well as by laser microprobe mass analysis. Ultrastructurally, these histiocytes contained amorphous material within the cytoplasm and stored in lysosomal structures. Comparative cathodoluminescence disclosed the presence of doxycycline in affected skin by means of overlapping emission spectra between the patient's skin and pure doxycycline. Taken together, the histomorphologic and ultrastructural changes induced by doxycycline shared several features with cutaneous hyperpigmentation caused by minocycline. Our biophysical findings further suggest a direct deposition of doxycycline, probably chelated with iron and/or calcium, within the lesional skin. Based on the presented unique case and the reviewed literature, only suprapharmacologic doses of doxycycline may be sufficient to cause such pigment changes.
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Affiliation(s)
- Markus Böhm
- Department of Dermatology, University of Münster, Germany.
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46
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Wang L, Zhang XS, Xu ZX, Shao XG. [Determination of tetracyclines antibiotics by reversed-phase high performance liquid chromatography]. Se Pu 2002; 20:49-51. [PMID: 12541619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2023] Open
Abstract
A method for the determination of 7 tetracycline antibiotics (TCs) by reversed-phase high performance liquid chromatography is described. TCs were successfully separated on a Diamonsil C18 column (250 mm x 4.6 mm i.d., 5 microns) using methanol-acetonitrile-0.01 mol/L oxalic acid (pH 2.0) (11:22:67, volume ratio) as mobile phase at a flow rate of 0.8 mL/min and detected at 267 nm within 22 min. Effects of the pH value of the mobile phase, concentration of the mobile phase buffer, elution composition and detection wavelength on the response and retention were studied. Tetracycline (TC) and oxytetracycline(OTC) in medicinal tablets were quantitated by standard added method. It has been proven that the method is fast, accurate and suitable for routine analysis.
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Affiliation(s)
- Lei Wang
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
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47
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Chen TB, Deng WH, Lu WH, Chen RM, Rao PF. [Detection of residual antibiotics in honey with capillary electrophoresis]. Se Pu 2001; 19:91-3. [PMID: 12541857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2023] Open
Abstract
Five antibiotics compounds, tetracycline (TC), oxytetracycline (OTC), doxycycline (DOC), chlortetracycline (CTC) and chloramphenicol (CP), were successfully separated and determined by high performance capillary electrophoresis(HPCE). Effects of buffer pH, various organic additives and temperature on electrophoretic separation of antibiotics were investigated. Satisfactory separation of these five antibiotics was achieved in the buffer of pH 3.2, 0.02 mol/L Na2HPO4-0.01 mol/L citric acid with addition of 4% (V/V) N-methylmorpholine and 12% (V/V) acetonitrile within 20 minutes. The calibration graphs were linear by plotting the peak area against the sample concentration over the range of 150 micrograms/L to 750 micrograms/L and the correlation coefficients were greater than 0.9917. The detection limits were 10 micrograms/L for CP, 20 micrograms/L for TC, OTC and DOC and 40 micrograms/L for CP (signal to noise ratio > 5). HPCE method was successfully applied to the analysis of trace antibiotics in honey.
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Affiliation(s)
- T B Chen
- Institute of Biotechnology, Fuzhou University, Fuzhou 350002, China.
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48
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Abstract
An optimized capillary electrophoresis method for the analysis of doxycycline is described. The influence of methanol as organic modifier, buffer pH, buffer concentration, capillary length, column temperature, Triton X-100 and methyl-beta-cyclodextrin was systematically investigated. A central composite design was performed in order to optimize the method. The optimal separation conditions were: capillary, uncoated fused-silica [40 cm (32 cm effective length) x 50 microm I.D.]; background electrolyte, a solution of 145 mM sodium carbonate and 1 mM EDTA brought to pH 10.3-methanol (89:11, v/v); temperature, 15 degrees C; voltage, 12 kV. The method showed good selectivity, repeatability, linearity and sensitivity. Six commercial samples were quantitatively analyzed. The results were compared with those established by the liquid chromatography method from the European Pharmacopoeia.
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Affiliation(s)
- E C Gil
- Centro de Química Farmacéutica, Havana, Cuba
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49
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Monser L, Darghouth F. Rapid liquid chromatographic method for simultaneous determination of tetracyclines antibiotics and 6-epi-doxycycline in pharmaceutical products using porous graphitic carbon column. J Pharm Biomed Anal 2000; 23:353-62. [PMID: 10933527 DOI: 10.1016/s0731-7085(00)00329-0] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
A rapid and selective high performance liquid chromatographic (HPLC) method has been developed for the separation and determination of five commercially used tetracyclines. The chromatography was performed on a porous graphitic carbon (PGC) column, using 0.05 M potassium phosphate buffer (pH 2.0)--acetonitrile (40 + 60) as the mobile phase and ultraviolet detection at 268 nm. The method permits the simultaneous determination of oxytetracycline, metacycline, chlortetracycline and doxycycline as well as the separation of one of their common impurities (6-Epi-doxycycline) in bulk powder and pharmaceutical preparations with detection limits of 0.5-2 microg ml(-1) and recoveries of 98.9-100.5%. Correlation coefficients for calibration curves in the range of 5-50 microg ml(-1) were greater than 0.999 for all tetracyclines. The within- and between-day precision was determined for both retention times and peak area. It is suggested that the proposed HPLC-PGC method should be used for routine quality control and dosage form assay of tetracyclines in pharmaceutical preparations. The chromatographic behaviour of the five tetracyclines was examined under variable mobile phase compositions, the results revealed that elution order and selectivity were dependent on the buffer agent used. Comparison between retentions obtained with PGC and with silica-based stationary phase (ODS), showed similar variations of the capacity factors with the mobile phase composition, but with a different elution order.
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Affiliation(s)
- L Monser
- Institut National des Sciences Appliquées et de la Technoloqie, Centre Urbain Nord, Tunis, Tunisia.
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50
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Axisa B, Naylor AR, Bell PR, Thompson MM. Simple and reliable method of doxycycline determination in human plasma and biological tissues. J Chromatogr B Biomed Sci Appl 2000; 744:359-65. [PMID: 10993525 DOI: 10.1016/s0378-4347(00)00261-9] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Over recent years there has been a resurgence in the use of doxycycline in clinical practice, which does not depend on its antibacterial properties. This paper describes a method of determination of doxycycline in human plasma and atheromatous tissue using high-performance liquid chromatography (HPLC), and a cheap commercially available extraction system. Doxycycline is extracted in the mobile phase and injected directly into the HPLC system, avoiding time consuming drying up steps. A limit of detection of 0.125 microg/ml of plasma, and a relative standard deviation of 3% was achieved, making the method very reliable and useful for assays within the usual therapeutic range. The method has also been applied to the extraction of a mixture of tetracyclines from plasma and atherma with equal efficacy, making it useful for assays of this class of drugs in veterinary practice and assays of food contaminants.
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Affiliation(s)
- B Axisa
- Department of Surgery, Leicester Royal Infirmary, UK.
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