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Aldosari BN, Al-Mutairi AM, Almurshedi AS, M. Alfagih I, Al Quadeib BT, Eltahir E, Almarshidy SS, Ibrahim MA, El Sayeh F. Abou El Ela A. Impacts of storage conditions on the dissolution performance of commercial metronidazole tablets available in Saudi Arabia. Saudi Pharm J 2024; 32:102134. [PMID: 38993287 PMCID: PMC11234021 DOI: 10.1016/j.jsps.2024.102134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Accepted: 06/11/2024] [Indexed: 07/13/2024] Open
Abstract
This study aimed to investigate the impact of storage conditions on the dissolution performance of commercial metronidazole (MTZ) tablets available in Saudi Arabia; these were coded as the reference and Test A, Test B, and Test C products. Moreover, the hardness and the disintegration time were measured. The UV spectrophotometrically analytical technique was utilized to quantify MTZ. All the control tablets, which were tested upon receipt, met the USP requirement as not less than 85 % of the labeled amount of MTZ was dissolved in 60 min. The MTZ reference released 91.79 % ± 1.23 after 60 min, while the products A, B, and C released 87.96 % ± 2.60, 93.26 % ± 2.01, and 88.61 % ± 2.04, respectively. The different dissolution parameters calculated for all the control tablets showed that the MTZ products A and B had optimal dissolution performances and were considered similar to the reference product. The product C showed a significantly reduced dissolution performance and was considered different from the reference. The in vitro dissolution of the MTZ tablets stored at 40oC ± 2 oC/75 % RH ± 5 % for 6 months indicated that the tablets maintained compliance with the USP requirement. The MTZ reference released 89.36 % ± 3.64 after 60 min, while the products A, B, and C released 95.79 % ± 3.91, 88.52 % ± 2.52, and 87.79 % ± 5.04, respectively. However, a slight reduction in the percentage released after 30 min (% DE30) and a slight increase in the mean dissolution time (MDT) were observed during the first 3 months of storage under stressed conditions. These changes were more obvious after 6 months of storage under the same conditions. Furthermore, in vitro dissolution of the product C stored at 40oC ± 2 oC/75 % RH ± 5 % for 3 months with further protection against high humidity revealed an improvement in the dissolution parameters due to the similar protective effects exerted by the two packaging forms. Furthermore, the study shows that storage conditions such as humidity and temperature affect in vitro dissolution of MTZ marketed tablets which may have an impact on efficiency and patient safety.
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Affiliation(s)
- Basmah N. Aldosari
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11495, Saudi Arabia
| | - Areej M. Al-Mutairi
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11495, Saudi Arabia
| | - Alanood S. Almurshedi
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11495, Saudi Arabia
| | - Iman M. Alfagih
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11495, Saudi Arabia
| | - Bushra T. Al Quadeib
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11495, Saudi Arabia
| | - Eram Eltahir
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11495, Saudi Arabia
| | - Salma S. Almarshidy
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11495, Saudi Arabia
| | - Mohamed A. Ibrahim
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11495, Saudi Arabia
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Kostrzębska A, Junka A, Brożyna M, Musiał W. The Assessment of Physicochemical and Antimicrobial Properties of Hydrophilic Gels Containing Tetracycline Hydrochloride and Various Concentrations of Ethanol. Pharmaceutics 2024; 16:830. [PMID: 38931950 PMCID: PMC11207367 DOI: 10.3390/pharmaceutics16060830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2024] [Revised: 06/10/2024] [Accepted: 06/15/2024] [Indexed: 06/28/2024] Open
Abstract
The high prevalence of acne, which affects nearly 85% of adolescents and young adults, underscores the importance of exploring new therapeutic solutions. The aim of the present study was to design a stable hydrogel formulation containing tetracycline hydrochloride (TC) in the presence of ethanol at various concentration levels. The antibiotic stability was assessed over a period of 84 days using the HPLC method. The rheological properties of the formulations and their microbiological activity were also evaluated. Hydrogels without ethanol and those containing 5% and 25% alcohol showed similar rheological properties and high stability of the antibiotic throughout the observation period. The formulation with the highest ethanol content of 50% differed significantly from the others in terms of rheological properties. Although the flow and viscosity curves were like those of the other formulations, the viscosity values were significantly lower. The stability of tetracycline in this formulation was also significantly lower, and by the 84th day of observation, the concentration of the drug had decreased to almost 45% of its initial content. The formulations containing the highest concentration of ethanol displayed the highest activity against the biofilm of the acne-causing agent, Cutibacterium acnes. The study demonstrated the possibility of developing stable and antimicrobial effective hydrogel formulations with tetracycline and ethanol as a substance enhancing drug penetration into the hair follicles.
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Affiliation(s)
- Agnieszka Kostrzębska
- Department of Physical Chemistry and Biophysics, Pharmaceutical Faculty, Wroclaw Medical University, Borowska 211, 50-556 Wroclaw, Poland;
| | - Adam Junka
- Platform for Unique Models Application P.U.M.A., Department of Pharmaceutical Microbiology and Parasitology, Wroclaw Medical University, Borowska 211, 50-556 Wroclaw, Poland
| | - Malwina Brożyna
- Platform for Unique Models Application P.U.M.A., Department of Pharmaceutical Microbiology and Parasitology, Wroclaw Medical University, Borowska 211, 50-556 Wroclaw, Poland
| | - Witold Musiał
- Department of Physical Chemistry and Biophysics, Pharmaceutical Faculty, Wroclaw Medical University, Borowska 211, 50-556 Wroclaw, Poland;
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Putta SK, Kb K, Nayak UY, Pai K SR, Pathuri R, Hn AR. Design of floating formulations and antiulcer activity of Desmostachya bipinnata. AAPS PharmSciTech 2024; 25:44. [PMID: 38383866 DOI: 10.1208/s12249-024-02745-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 01/11/2024] [Indexed: 02/23/2024] Open
Abstract
The study aims to design and optimize the floating formulations of the aqueous extract of Desmostachya bipinnata (ADB) to treat peptic ulcers. The trial concentrations of HPMC E50, HPMC K4M, and Carbopol 940 were used as factors, and floating lag time, total floating time, and % drug release at 12 h were used as responses. The formulation underwent evaluation for different parameters: aspirin-induced ulcers in rats assessed the antiulcer activity, and X-ray studies in rabbits evaluated the gastroretentive nature. The optimized formulation has shown a floating lag time of 32 s and floated in the gastric medium for more than 9 h with a maximum drug release of 93% at the end of 12 h by following the Korsmeyer-Peppas drug release mechanism. The optimized formulation has good flow properties. The FT-IR, DSC, and XRD studies show ADB and excipients didn't show any incompatibility. The formulation has shown significant antiulcer activity against aspirin-induced ulcers in rats, with an ulcer index of 3.38 ± 0.24 and inhibition of 76.67 ± 0.56%. The in vivo X-ray imaging proved the gastric retention of the formulations for more than 8 h. The results of the formulations demonstrate the floating ability and sustained drug release of the tablet responsible for treating peptic ulcers to show a localized effect in the gastric region and to maintain the ROS levels.
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Affiliation(s)
- Sanjay Kumar Putta
- Department of Pharmacognosy, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Udupi, 576 104, India
| | - Koteshwara Kb
- Department of Pharmaceutics, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Udupi, 576 104, India
| | - Usha Y Nayak
- Department of Pharmaceutics, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Udupi, 576 104, India
| | - Sreedhara Ranganath Pai K
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Udupi, 576 104, India
| | - Raghuveer Pathuri
- Department of Pharmaceutics, GITAM School of Pharmacy, GITAM University, Hyderabad, 502329, India
| | - Aswatha Ram Hn
- Department of Pharmacognosy, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, Udupi, 576 104, India.
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Hassan AM, Kelani KM, Hegazy MA, Nadim AH, Tantawy MA. A probe of new molecularly imprinted solid-phase extraction coupled with HPLC-DAD and atomic absorption spectrophotometry for quantification of tetracycline HCl, metronidazole and bismuth subcitrate in combination with their official impurities: Application in dosage form and human plasma. J Chromatogr B Analyt Technol Biomed Life Sci 2024; 1234:124032. [PMID: 38301337 DOI: 10.1016/j.jchromb.2024.124032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/21/2024] [Accepted: 01/23/2024] [Indexed: 02/03/2024]
Abstract
The integration of molecular imprinting technique with chromatographic one has a great impact on the assay's selectivity and sensitivity. Herein, a molecularly imprinted solid-phase extraction associated with high performance liquid chromatography (MISPE-HPLC) was employed for simultaneous determination of the co-formulated drugs; tetracycline hydrochloride (TET) and metronidazole (MET), in plasma and in their anti-H-pylori drug for the first time. Two sorts of molecularly imprinted polymers (MIPs) were fabricated using TET and MET as the template molecules, while ethylene glycol dimethacrylate and methacrylic acid were used as a cross-linker and a monomer, respectively. The synthesized MIPs were identified using different techniques. The adsorption-desorption capability of each template was investigated towards its corresponding MIP. The extraction conditions of MISPE was optimized with respect to TET/MIP and MET/MIP sorbent. Bismuth subcitrate (BSC), the third co-formulated drug was analyzed in spiked human plasma using an atomic absorption spectrometric (AAS) method. The performance of the developed methods was assured as per ICH guidelines for analyzing the studied drugs in their pharmaceutical dosage form along with two of their official impurities. In addition, bioanalytical method validation was conducted where linearity was achieved at 2.0-40.0 μg mL-1, 2.0-40.0 μg mL-1 and 5.0-80.0 μg mL-1 for TET, MET and BSC, respectively.
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Affiliation(s)
- Amal M Hassan
- Analytical Chemistry Department, Faculty of Pharmacy, Modern University for Technology and Information, El-hadaba El-Wosta, Mokatam, 5th District, Cairo, Egypt
| | - Khadiga M Kelani
- Analytical Chemistry Department, Faculty of Pharmacy, Modern University for Technology and Information, El-hadaba El-Wosta, Mokatam, 5th District, Cairo, Egypt; Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Maha A Hegazy
- Pharmaceutical Chemistry Department, Faculty of Pharmacy, Future University in Egypt, Cairo, 11835, Egypt
| | - Ahmed H Nadim
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Mahmoud A Tantawy
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt; Department of Chemistry, Faculty of Pharmacy, October 6 University, 6 of October City, Giza, Egypt.
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Perez-Bou L, Gonzalez-Martinez A, Gonzalez-Lopez J, Correa-Galeote D. Promising bioprocesses for the efficient removal of antibiotics and antibiotic-resistance genes from urban and hospital wastewaters: Potentialities of aerobic granular systems. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 342:123115. [PMID: 38086508 DOI: 10.1016/j.envpol.2023.123115] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 11/07/2023] [Accepted: 12/05/2023] [Indexed: 12/17/2023]
Abstract
The use, overuse, and improper use of antibiotics have resulted in higher levels of antibiotic-resistant bacteria (ARB) and antibiotic-resistance genes (ARGs), which have profoundly disturbed the equilibrium of the environment. Furthermore, once antibiotic agents are excreted in urine and feces, these substances often can reach wastewater treatment plants (WWTPs), in which improper treatments have been highlighted as the main reason for stronger dissemination of antibiotics, ARB, and ARGs to the receiving bodies. Hence, achieving better antibiotic removal capacities in WWTPs is proposed as an adequate approach to limit the spread of antibiotics, ARB, and ARGs into the environment. In this review, we highlight hospital wastewater (WW) as a critical hotspot for the dissemination of antibiotic resistance due to its high level of antibiotics and pathogens. Hence, monitoring the composition and structure of the bacterial communities related to hospital WW is a key factor in controlling the spread of ARGs. In addition, we discuss the advantages and drawbacks of the current biological WW treatments regarding the antibiotic-resistance phenomenon. Widely used conventional activated sludge technology has proved to be ineffective in mitigating the dissemination of ARB and ARGs to the environment. However, aerobic granular sludge (AGS) technology is a promising technology-with broad adaptability and excellent performance-that could successfully reduce antibiotics, ARB, and ARGs in the generated effluents. We also outline the main operational parameters involved in mitigating antibiotics, ARB, and ARGs in WWTPs. In this regard, WW operation under long hydraulic and solid retention times allows better removal of antibiotics, ARB, and ARGs independently of the WW technology employed. Finally, we address the current knowledge of the adsorption and degradation of antibiotics and their importance in removing ARB and ARGs. Notably, AGS can enhance the removal of antibiotics, ARB, and ARGs due to the complex microbial metabolism within the granular biomass.
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Affiliation(s)
- Lizandra Perez-Bou
- Microbiology Department, Faculty of Pharmacy, University of Granada, Granada, Andalucía, Spain; Microbiology and Environmental Technology Section, Institute of Water Research, University of Granada, Granada, Andalucía, Spain; Microbial Biotechnology Group, Microbiology and Virology Department, Faculty of Biology, University of Havana, Cuba
| | - Alejandro Gonzalez-Martinez
- Microbiology Department, Faculty of Pharmacy, University of Granada, Granada, Andalucía, Spain; Microbiology and Environmental Technology Section, Institute of Water Research, University of Granada, Granada, Andalucía, Spain
| | - Jesus Gonzalez-Lopez
- Microbiology Department, Faculty of Pharmacy, University of Granada, Granada, Andalucía, Spain; Microbiology and Environmental Technology Section, Institute of Water Research, University of Granada, Granada, Andalucía, Spain
| | - David Correa-Galeote
- Microbiology Department, Faculty of Pharmacy, University of Granada, Granada, Andalucía, Spain; Microbiology and Environmental Technology Section, Institute of Water Research, University of Granada, Granada, Andalucía, Spain.
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Waffo Tchounga CA, Marini RD, Nnanga Nga E, Ciza Hamuli P, Ngono Mballa R, Hubert P, Ziemons E, Sacré PY. In-Field Implementation of Near-Infrared Quantitative Methods for Analysis of Medicines in Tropical Environments. APPLIED SPECTROSCOPY 2023; 77:1264-1279. [PMID: 37735910 DOI: 10.1177/00037028231201653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/23/2023]
Abstract
Near-infrared (NIR) spectroscopy is actually a well-established technique that demonstrates its performance in the frame of detection of poor-quality medicines. The use of low-cost handheld NIR spectrophotometers in low-resource contexts can allow an inexpensive and more rapid detection compared to laboratory methods. Considering these points, it was decided to develop, validate, and transfer methods for the quantification of ciprofloxacin and metronidazole tablet samples using a NIR handheld spectrophotometer in transmission mode (NIR-M-T1) coupled to chemometrics such as partial least squares regression (PLSR) algorithm. All of the models were validated with the total error approach using an accuracy profile as a decision tool, with ±10% specifications and a risk α set at 5%. Quantitative PLSR models were first validated in Belgium, which is a temperate oceanic climate zone. Second, they were transferred to Cameroon, a tropical climate zone, where issues regarding the prediction of new validation series with the initial models were highlighted. Two augmentation strategies were then envisaged to make the predictive models robust to environmental conditions, incorporating the potential variability linked to environmental effects in the initial calibration sets. The resulting models were then used for in-field analysis of ciprofloxacin and metronidazole tablet samples collected in three cities in Cameroon. The contents results obtained for each sample with the two strategies were close and not statistically different. Nevertheless, the first one is easier to implement and the second is the best regarding model diagnostic measures and accuracy profiles. Two samples were found to be noncompliant in terms of content, and these results were confirmed using high-performance liquid chromatography taken as the reference method.
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Affiliation(s)
- Christelle Ange Waffo Tchounga
- Department of Pharmacy, University of Liège (ULiège), CIRM, ViBra-Santé hub, Laboratory of Pharmaceutical Analytical Chemistry, Liège, Belgium
- Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon
| | - Roland Djang'eing'a Marini
- Department of Pharmacy, University of Liège (ULiège), CIRM, ViBra-Santé hub, Laboratory of Pharmaceutical Analytical Chemistry, Liège, Belgium
| | - Emmanuel Nnanga Nga
- Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon
| | - Patient Ciza Hamuli
- Faculty of Pharmaceutical Sciences, University of Kinshasa, Lemba, Kinshasa, Democratic Republic of the Congo
| | - Rose Ngono Mballa
- Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon
- Laboratoire National de Contrôle des Médicaments et Expertise (LANACOME), Yaoundé, Cameroon
| | - Philippe Hubert
- Department of Pharmacy, University of Liège (ULiège), CIRM, ViBra-Santé hub, Laboratory of Pharmaceutical Analytical Chemistry, Liège, Belgium
| | - Eric Ziemons
- Department of Pharmacy, University of Liège (ULiège), CIRM, ViBra-Santé hub, Laboratory of Pharmaceutical Analytical Chemistry, Liège, Belgium
| | - Pierre-Yves Sacré
- Department of Pharmacy, University of Liège (ULiège), CIRM, Research Support Unit in Chemometrics, Liège, Belgium
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Effect of Hydrogel Substrate Components on the Stability of Tetracycline Hydrochloride and Swelling Activity against Model Skin Sebum. Int J Mol Sci 2023; 24:ijms24032678. [PMID: 36768998 PMCID: PMC9916833 DOI: 10.3390/ijms24032678] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 01/23/2023] [Accepted: 01/24/2023] [Indexed: 02/01/2023] Open
Abstract
Due to its high instability and rapid degradation under adverse conditions, tetracycline hydrochloride (TC) can cause difficulties in the development of an effective but stable formulation for the topical treatment of acne. The aim of the following work was to propose a hydrogel formulation that would ensure the stability of the antibiotic contained in it. Additionally, an important property of the prepared formulations was the activity of the alcoholamines contained in them against the components of the model sebum. This feature may help effectively cleanse the hair follicles in the accumulated sebum layer. A series of formulations with varying proportions of anionic polymer and alcoholamine and containing different polymers have been developed. The stability of tetracycline hydrochloride contained in the hydrogels was evaluated for 28 days by HPLC analysis. Formulations containing a large excess of TRIS alcoholamine led to the rapid degradation of TC from an initial concentration of about 10 µg/mL to about 1 µg/mL after 28 days. At the same time, these formulations showed the highest activity against artificial sebum components. Thanks to appropriately selected proportions of the components, it was possible to develop a formulation that assured the stability of tetracycline for ca. one month, while maintaining formulation activity against the components of model sebum.
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8
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TLC–Densitometric Analysis of Selected 5-Nitroimidazoles. Processes (Basel) 2023. [DOI: 10.3390/pr11010170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Metronidazole, ornidazole, tinidazole, and secnidazole are 5-nitroimidazoles. The purpose of this work was to propose a new economical TLC–densitometric method to evaluate the chemical stability of metronidazole, secnidazole, ornidazole, and tinidazole under stress conditions. A forced degradation study was performed on silica gel and aqueous solutions at various pH values; the metronidazole, secnidazole, ornidazole, and tinidazole solutions were prepared in saline and in hydrogen peroxide, respectively. The samples of the 5-nitroimidazoles were heated. TLC analyses were performed on silica gel 60F254 using chloroform–methanol (9:1, v/v) as the mobile phase. As the TLC–densitometric method can effectively separate the metronidazole, secnidazole, ornidazole, and tinidazole from their degradation products which formed as a result of the stress studies, it is considered to can be a good alternative and important tool in the routine quality control and stability testing of metronidazole, secnidazole, ornidazole, and tinidazole in pharmaceutical formulations. The results indicate that the proposed TLC–densitometric method is cost-effective, rapid, specific, accurate, and precise; the TLC–densitometric method also realizes the criterion of the linearity. A major advantage of the proposed method is its low cost and ability to analyze the 5-nitroimidazole which was investigated and all its degradation products simultaneously.
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Biodegradation of Tetracycline Antibiotics by the Yeast Strain Cutaneotrichosporon dermatis M503. Microorganisms 2022; 10:microorganisms10030565. [PMID: 35336139 PMCID: PMC8955161 DOI: 10.3390/microorganisms10030565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 02/22/2022] [Accepted: 03/01/2022] [Indexed: 11/16/2022] Open
Abstract
In this study, the Cutaneotrichosporon dermatis strain M503 was isolated and could efficiently degrade tetracycline, doxycycline, and chlorotetracyline. The characteristics of tetracycline degradation were investigated under a broad range of cultural conditions. Response surface methodology (RSM) predicted that the highest degradation rate of tetracycline could be obtained under the following conditions: 39.69 °C, pH of 8.79, and inoculum dose of 4.0% (v/v, ~3.5 × 106 cells/mL in the medium). In accordance with the five identified degradation products of tetracycline, two putative degradation pathways, which included the shedding of methyl and amino groups, were proposed. Moreover, the well diffusion method showed that the strain of M503 decreases the antibacterial potency of tetracycline, doxycycline, and chlorotetracycline. These findings proposed a putative mechanism of tetracycline degradation by a fungus strain and contributed to the estimation of the fate of tetracycline in the aquatic environment.
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Evaluation of the Influence of a Hydrogel Containing AMPD on the Stability of Tetracycline Hydrochloride. Pharmaceutics 2021; 13:pharmaceutics13091381. [PMID: 34575457 PMCID: PMC8468035 DOI: 10.3390/pharmaceutics13091381] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 08/18/2021] [Accepted: 08/27/2021] [Indexed: 11/17/2022] Open
Abstract
Tetracyclines, as beneficial antimicrobial factors in both local and systemic therapy, are characterized by high instability. The aim of the study was the development of the influence of hydrogel formulation on the tetracycline hydrochloride (TC) level under varying storage conditions. The HPLC, XPRD as well as SEM and macroscopic observations were involved in the study. The TC concentration decreased within ca. two months from 9.37 µg/mL to 4.41 µg/mL in the case of the photoprotected TC solution stored at 23 °C, whereas the decrease in storage temperature did not improve the final level of TC. In the presence of AMPD, the TC level in aqueous solution decreased drastically to ca. 1 µg/mL. Application of a polyacrylic acid derivative enabled conservation of the TC level through the ca. two months. Thus, the use of alcoholamine in the preparation of the TC hydrogel may result in the development of a therapeutic product with a dual action against acne, including antimicrobial activity and saponification of free fatty acids deposited in the follicles.
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11
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Starek M, Dąbrowska M, Chebda J, Żyro D, Ochocki J. Stability of Metronidazole and Its Complexes with Silver(I) Salts under Various Stress Conditions. Molecules 2021; 26:3582. [PMID: 34208193 PMCID: PMC8230755 DOI: 10.3390/molecules26123582] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 06/06/2021] [Accepted: 06/08/2021] [Indexed: 11/16/2022] Open
Abstract
Metronidazole is a drug widely used in the prevention and treatment of bacterial infections. Due to its possibility of the formation of stable metal complexes, it was decided to broaden its activity spectrum by introducing the silver(I) coordination compounds i.e., [Ag(MTZ)2NO3] and [(Ag(MTZ)2)2]SO4, which have significant antibacterial properties. The paper presents a description of a new qualitative and quantitative analysis of metronidazole in bulk and possible pharmaceutical preparations by thin-layer chromatography with densitometric detection. Optimal separation conditions were selected, and the analytical procedure was validated according to the ICH guidelines. The obtained data indicate that the method is sufficiently sensitive, precise, and accurate. The stability of the metronidazole solutions obtained from tablets, pure metronidazole, and its silver(I) complexes was tested. The research was carried out in various environments, at different temperatures, in H2O2 solution, and during exposure to radiation (UV, sunlight). The greatest degradation was found in the alkaline environment and at higher temperatures. The silver(I) complexes exhibited relatively high stability under analyzed conditions that are higher than standard metronidazole solutions and tablets. The observations were confirmed by the kinetic and thermodynamic analysis. The described studies of new metronidazole silver(I) complexes increase the potential for their application in infections both in humans and animals.
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Affiliation(s)
- Małgorzata Starek
- Department of Inorganic and Analytical Chemistry, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688 Kraków, Poland; (M.S.); (M.D.); (J.C.)
| | - Monika Dąbrowska
- Department of Inorganic and Analytical Chemistry, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688 Kraków, Poland; (M.S.); (M.D.); (J.C.)
| | - Joanna Chebda
- Department of Inorganic and Analytical Chemistry, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30-688 Kraków, Poland; (M.S.); (M.D.); (J.C.)
| | - Dominik Żyro
- Department of Bioinorganic Chemistry, Chair of Medicinal Chemistry, Faculty of Pharmacy, Medical University of Lodz, Muszyńskiego 1, 90-151 Łódź, Poland;
| | - Justyn Ochocki
- Department of Bioinorganic Chemistry, Chair of Medicinal Chemistry, Faculty of Pharmacy, Medical University of Lodz, Muszyńskiego 1, 90-151 Łódź, Poland;
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12
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Dong B, Hadinoto K. Assessing the impact of counterion types on the sustained release characteristics of high-payload drug-ion complex: A case study on tetracycline hydrochloride. Eur J Pharm Sci 2021; 161:105787. [PMID: 33684485 DOI: 10.1016/j.ejps.2021.105787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 01/29/2021] [Accepted: 03/02/2021] [Indexed: 02/07/2023]
Abstract
Complexation of ionized hydrophilic drugs with counterions (e.g. polyelectrolytes, ionic amphiphiles, multivalent salt ions) represents a well-established formulation approach to produce sustained release of highly soluble drugs while maintaining a high drug payload. This renders the drug-ion complex an attractive alternative to the conventional polymer matrix systems. The effects of the counterion's type on the sustained release characteristics of drug-ion complexes, however, have not been investigated before under the same dissolution environment. Using antibiotic tetracycline hydrochloride (TC•HCl) as the model hydrophilic drug, we investigated the effects of three types of counterions, sodium dextran sulfate (DXT), sodium dodecyl sulfate (SDS), and K2HPO4, on (1) the sustained release characteristics, (2) long-term storage stability, (3) preparation efficiency (i.e. yield, payload), and (4) antibiotic activity of the resultant (TC•HCl)-ion complexes. The results showed that the three complexes exhibited comparable TC•HCl payloads at approximately 80% (w/w) and yield between 40 and 60% (w/w). They also exhibited good storage stability after 18 months and uncompromised antibiotic activity compared to the native drug. In the intestinal fluid, all three complexes could produce sustained drug release profiles, albeit at different rates ((TC•HCl)-DXT > (TC•HCl)-SDS > (TC•HCl)-HPO4), whereas in the gastric fluid, only the (TC•HCl)-DXT complex could produce a sustained release profile suitable for oral delivery. The different sustained release profiles among the complexes were attributed to their different solid forms (amorphous versus crystalline), hydrophobicity, solubility, and drug release mechanisms. The present work highlighted the importance of selecting the most suitable counterion to achieve the desired sustained drug release profile.
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Affiliation(s)
- Bingxue Dong
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459
| | - Kunn Hadinoto
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459.
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Minallah S, Pervaiz E, Yousaf MU, Niazi MBK, Honghong L, Yang M. Ternary adsorbent photocatalyst hybrid (APH) nanomaterials for improved abstraction of tetracycline from water. SEP SCI TECHNOL 2020. [DOI: 10.1080/01496395.2019.1640742] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Sammar Minallah
- Department of Chemical Engineering, School of Chemical & Materials Engineering (SCME), National University of Sciences & Technology (NUST), Islamabad, Pakistan
| | - Erum Pervaiz
- Department of Chemical Engineering, School of Chemical & Materials Engineering (SCME), National University of Sciences & Technology (NUST), Islamabad, Pakistan
| | - M. Usman Yousaf
- Department of Chemical Engineering, School of Chemical & Materials Engineering (SCME), National University of Sciences & Technology (NUST), Islamabad, Pakistan
| | - M. Bilal Khan Niazi
- Department of Chemical Engineering, School of Chemical & Materials Engineering (SCME), National University of Sciences & Technology (NUST), Islamabad, Pakistan
| | - Liu Honghong
- Solid State functional Materials Research Lab, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences (CAS), Ningbo, China
| | - Minghui Yang
- Solid State functional Materials Research Lab, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences (CAS), Ningbo, China
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Wu X, Wu X, Zhou X, Gu Y, Zhou H, Shen L, Zeng W. The roles of extracellular polymeric substances of Pandoraea sp. XY-2 in the removal of tetracycline. Bioprocess Biosyst Eng 2020; 43:1951-1960. [PMID: 32500436 DOI: 10.1007/s00449-020-02384-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 05/25/2020] [Indexed: 11/30/2022]
Abstract
In this study, the roles of extracellular polymeric substances (EPSs) excreted by Pandoraea sp. XY-2 in the removal of tetracycline (TC) were investigated. In the early stage, TC in the solution was mainly removed by the adsorption of EPSs, which accounted for 20% of TC. Thereafter, large amount of TC was transported into the intracellular and biodegraded. EPSs was extracted and the contents of polyprotein and polysaccharides reached their maximum values (30.84 mg/g and 11.15 mg/g) in the first four days. Fourier transform infrared spectroscopy analysis revealed that hydroxyl, methylidyne, methylene and amide I groups in EPSs participated in the adsorption of TC. Furthermore, three-dimensional excitation-emission matrix fluorescence spectroscopy analysis revealed that TC caused the quenching of EPSs fluorescent groups. The quenching mechanism was attributed to static quenching and protein-like substances in EPSs from Pandoraea sp. XY-2 dominated the TC adsorption process. Bioinformatic analysis of Pandoraea sp. XY-2 genome identified multiple genes involved in exopolysaccharide synthesis and EPSs formation. The insights gained in this study might provide a better understanding about the adsorption process of EPSs in tetracycline-contaminated environment.
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Affiliation(s)
- Xueling Wu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
- Key Laboratory of Biometallurgy, Ministry of Education, Changsha, 410083, China
| | - Xiaoyan Wu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
| | - Xiangyu Zhou
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
| | - Yichao Gu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
| | - Han Zhou
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
| | - Li Shen
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
- Key Laboratory of Biometallurgy, Ministry of Education, Changsha, 410083, China
| | - Weimin Zeng
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China.
- Key Laboratory of Biometallurgy, Ministry of Education, Changsha, 410083, China.
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Lis H, Stepnowski P, Caban M. Salinity and pH as factors affecting the passive sampling and extraction of pharmaceuticals from water. J Sep Sci 2019; 42:2949-2956. [PMID: 31267662 DOI: 10.1002/jssc.201900346] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 06/24/2019] [Accepted: 06/27/2019] [Indexed: 11/05/2022]
Abstract
Passive sampling is an attractive technique for the long-term monitoring of pharmaceuticals in the water environment. The reliability of the received results depends on the properly performed calibration, namely the determination of analyte sampling rates. This step can be the source of a systematic error, as the sampling rate values are dependent on the water donor phase parameters. This is especially important for pharmaceuticals, since their chemical characteristics and ionic form change with pH. In this study, the cross-effect of pH (3, 7, and 9) and salinity (0, 7, and 35 practical salinity unit, using artificial sea water) on the passive sampling of 21 pharmaceuticals (antiparasitics, beta-blockers, non-steroidal anti-inflammatory drugs, sulfonamides) was tested. The primarily determined parameter was the sampling rate. In addition, the extraction efficiency, partitioning coefficient, and the concentration of the analytes on the sorbent were calculated. Generally, for the non-steroidal anti-inflammatory drugs, beta-blockers, and antiparasitics, the change both in pH and salinity had a negligible impact on the mentioned experimental parameters. In contrast, the extraction of sulfonamides was impacted by both pH and salinity, while lipophilicity was not a decisive parameter.
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Affiliation(s)
- Hanna Lis
- Institute for Environmental and Human Health Protection, Faculty of Chemistry, University of Gdansk, Gdańsk, Poland
| | - Piotr Stepnowski
- Institute for Environmental and Human Health Protection, Faculty of Chemistry, University of Gdansk, Gdańsk, Poland
| | - Magda Caban
- Institute for Environmental and Human Health Protection, Faculty of Chemistry, University of Gdansk, Gdańsk, Poland
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Czarnobaj K, Prokopowicz M, Greber K. Use of Materials Based on Polymeric Silica as Bone-Targeted Drug Delivery Systems for Metronidazole. Int J Mol Sci 2019; 20:E1311. [PMID: 30875887 PMCID: PMC6470757 DOI: 10.3390/ijms20061311] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 03/09/2019] [Accepted: 03/11/2019] [Indexed: 11/16/2022] Open
Abstract
Mesostructured ordered silica-based materials are the promising candidates for local drug delivery systems in bone disease due to their uniform pore size and distribution, and high surface area which affect their excellent adsorption properties, good biocompatibility and bioactivity, and versatile functionalization so that their properties can be controlled. Ordered mesoporous silica (MCM-41 type) was synthesized by a surfactant-assisted sol-gel process using tetraethoxysilane as a silica precursor and hexadecyltrimethylammonium bromide as the structure-directing agent. Functionalized silica materials containing various types of organic groups (3-aminopropyl, 3-mercaptopropyl, or 3-glycidyloxypropyl groups) were synthesized by the post-grafting method onto pre-made mesoporous silica. Comparative studies of their structural characteristics, the surface mineralization activity and release properties for the model drug Metronidazole (MT) were then conducted. It has been found that porosity parameters, mineralization activity and adsorption/release of metronidazole from mesoporous channels of silica can be regulated using functional groups which are chemically bounded with an outer silica surface. The preferential mineral nucleation was found on negatively charged surfaces-MCM-41, and mercaptopropyl and glycidyloxypropyl functionalized silica (MCM-SH and MCM-epoxy, respectively) in simulated body fluid (SBF solution), as well as a sustained release of MT. In contrast to them, aminopropyl-functionalized samples (MCM-NH₂) achieved a high MT release rate. These results confirm the potential of silica-based materials for local therapeutic applications (as drug carriers and bone substitutes) in bone disease.
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Affiliation(s)
- Katarzyna Czarnobaj
- Department of Physical Chemistry, Medical University of Gdańsk, al. gen. J. Hallera 107, 80-416 Gdańsk, Poland.
| | - Magdalena Prokopowicz
- Department of Physical Chemistry, Medical University of Gdańsk, al. gen. J. Hallera 107, 80-416 Gdańsk, Poland.
| | - Katarzyna Greber
- Department of Physical Chemistry, Medical University of Gdańsk, al. gen. J. Hallera 107, 80-416 Gdańsk, Poland.
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A New Controlled-Release Material Containing Metronidazole and Doxycycline for the Treatment of Periodontal and Peri-Implant Diseases: Formulation and In Vitro Testing. Int J Dent 2019; 2019:9374607. [PMID: 30956660 PMCID: PMC6425423 DOI: 10.1155/2019/9374607] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 01/22/2019] [Accepted: 01/28/2019] [Indexed: 11/17/2022] Open
Abstract
Background Several locally administered antimicrobials have been studied in the literature as adjunctive or primary treatments for periodontitis and peri-implantitis with conflicting results. Objective The aim of this study was twofold: (1) the formulation of a controlled-release material containing metronidazole and doxycycline; (2) an in vitro evaluation of its antibacterial properties against planktonic and biofilm species involved in periodontal and peri-implant diseases. Methods Doxycycline (10 mg/ml) and metronidazole (20 mg/ml) were incorporated into a hydroxyethylcellulose-polyvinylpyrrolidone-calcium polycarbophil gel. Three milliliters of gel were dialyzed against Dulbecco's phosphate-buffered saline for 13 days. Antibiotics release at 3, 7, 10, and 13 days was determined spectroscopically. The inhibitory activity of the experimental gel was tested against A. actinomycetemcomitans, S. sanguinis, P. micra, and E. corrodens with an agar diffusion test, an inactivation biofilm test, and a confocal laser scanning microscope study (CLSMS) for S. sanguinis up to 20 days. Results After 13 days, the released doxycycline was 9.7% (at 3 days = 1.2 mg; 7 days = 0.67 mg; 10 days = 0.76 mg; 13 days = 0.29 mg), while metronidazole was 67% (30 mg, 6.8 mg, 2.5 mg, and 0.9 mg at the same intervals). The agar diffusion test highlights that the formulated gel was active against tested microorganisms up to 312 h. Quantitative analysis of biofilm formation for all strains and CLSMS for S. sanguinis showed a high growth reduction up to 13 days. Conclusions The in vitro efficacy of the newly formulated gel was confirmed both on planktonic species and on bacterial biofilm over a period of 13 days. The controlled-release gel containing metronidazole and doxycycline had an optimal final viscosity and mucoadhesive properties. It can be argued that its employment could be useful for the treatment of periodontal and peri-implant diseases, where conventional therapy seems not successful.
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18
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Teixeira S, Delerue-Matos C, Santos L. Application of experimental design methodology to optimize antibiotics removal by walnut shell based activated carbon. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 646:168-176. [PMID: 30056227 DOI: 10.1016/j.scitotenv.2018.07.204] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2018] [Revised: 07/11/2018] [Accepted: 07/16/2018] [Indexed: 06/08/2023]
Abstract
Three-level Box-Behnken experimental design with three factors (pH, temperature and antibiotic initial concentration) combined with response surface methodology (RSM) was applied to study the removal of Metronidazole and Sulfamethoxazole by walnut shell based activated carbon. This methodology enabled to identify the effects of the different factors studied and their interactions in the response of each antibiotic. The relationship between the independent variable (sorption capacity) and the dependent variables (pH, temperature and antibiotic concentration) was adequately modelled by second-order polynomial equation. The pH factor exerted a significant but distinct influence on the removal efficiency of both antibiotics. The removal of Metronidazole is favoured by increasing pH values, with the maximum value obtained for pH 8 - upper limit of the study domain; while Sulfamethoxazole displays a maximum value around 5.5, with a decrease in the extent of adsorption as the pH increases. The best conditions, predicted by the model, for the removal of the antibiotic Sulfamethoxazole (106.9 mg/g) are obtained at a temperature of 30 °C, initial concentration of 40 mg/L and a pH value of 5.5. For the antibiotic Metronidazole, the highest removal value (127 mg/g) is expected to occur at the maximum levels attributed to each of the factors (pH = 8, Cin = 40 mg/L, T = 30 °C). The results of isotherm experiments (at 20 °C and pH 6) displayed a good agreement with the models predictions. The maximum sorption capacity, estimated by the Langmuir model, was 107.4 mg/g for Metronidazole and 93.5 mg/g for Sulfamethoxazole.
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Affiliation(s)
- S Teixeira
- REQUIMTE-LAQV, Instituto Superior de Engenharia, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 431, 4200-072 Porto, Portugal
| | - C Delerue-Matos
- REQUIMTE-LAQV, Instituto Superior de Engenharia, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 431, 4200-072 Porto, Portugal
| | - L Santos
- LEPABE, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
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Ahn Y, Jung JY, Veach BT, Khare S, Gokulan K, Piñeiro SA, Cerniglia CE. In vitro test systems to determine tetracycline residue binding to human feces. Regul Toxicol Pharmacol 2018; 99:105-115. [DOI: 10.1016/j.yrtph.2018.09.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Revised: 07/13/2018] [Accepted: 09/12/2018] [Indexed: 01/25/2023]
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Shao S, Hu Y, Cheng C, Cheng J, Chen Y. Simultaneous degradation of tetracycline and denitrification by a novel bacterium, Klebsiella sp. SQY5. CHEMOSPHERE 2018; 209:35-43. [PMID: 29913397 DOI: 10.1016/j.chemosphere.2018.06.093] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 06/10/2018] [Accepted: 06/12/2018] [Indexed: 06/08/2023]
Abstract
Polluted waters with a high residue of tetracycline also have a high concentration of nitrate. Thus, screening for both, highly efficient tetracycline biodegradation and nitrate transformation, is a key technical strategy. In this study, a novel tetracycline degrading strain, SQY5, which was identified as Klebsiella sp., was isolated from municipal sludge. Biodegradation characteristics of tetracycline were studied under various environmental conditions; including inoculation dose (v/v), initial tetracycline concentration, temperature, and pH. Response surface methodology (RSM) analysis demonstrated that the maximum degradation ratio of tetracycline can be obtained under the condition with an initial tetracycline concentration of 61.27 mg L-1, temperature of 34.96 °C, pH of 7.17, and inoculation dose of 29.89%. Furthermore, this was the first report on the relationship between the degradation of tetracycline and the denitrification effect, showing that a maximum tetracycline reduction rate of 0.113 mg L-1·h-1 and denitrification rate of 4.64 mg L-1·h-1 were observed within 32 h and 92 h of SQY5 inoculation, respectively. The data of this study has the potential for use in engineering processes designed for the simultaneous biological removal of nitrates while degrading antibiotics.
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Affiliation(s)
- Sicheng Shao
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China
| | - Yongyou Hu
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China.
| | - Ce Cheng
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China
| | - Jianhua Cheng
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China
| | - Yuancai Chen
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China
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21
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Tiwari A, Shukla A, Tiwari D, Lee SM. Nanocomposite thin films Ag 0(NP)/TiO 2 in the efficient removal of micro-pollutants from aqueous solutions: A case study of tetracycline and sulfamethoxazole removal. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 220:96-108. [PMID: 29775822 DOI: 10.1016/j.jenvman.2018.05.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2018] [Revised: 04/17/2018] [Accepted: 05/07/2018] [Indexed: 06/08/2023]
Abstract
The aim of this communication is to synthesize novel Nanocomposite thin film materials (Ag0(NP)/TiO2) using the template process. Surface morphology of materials was obtained by the Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) analyses. The presence of doped Ag-nanoparticles was confirmed by the TEM images along with the SEM-EDX analyses. The Atomic Force Microscopic images were demonstrated the surface roughness and thickness of Nanocomposite thin films. X-ray diffraction analysis confirmed that TiO2 was predominantly present to its anatase mineral phase. The Fourier Transform Infra-red analysis conducted to obtain the functional groups present with the solid. The specific surface area and pore sizes of Nanocomposites were obtained by the BET (Brunauer, Emmett, and Teller) analysis. Further, the Nanocomposite thin film photocatalysts were successfully employed in the degradation of emerging micro-pollutants viz., the antibiotics tetracycline and sulfamethoxazole from aqueous solutions using less harmful UV-A light (λmax 330 nm). The effect of solution pH (pH 4.0-8.0) and pollutant concentrations (1.0 mg/L-20.0 mg/L (for tetracycline) and (0.5 mg/L-15.0 mg/L (for sulfamethoxazole)) was extensively studied in the photocatalytic removal of these antibiotics. A significant decrease in percentage of non-purgeable organic carbon removal indicated that the micro-pollutants was substantially mineralized by the photocatalytic treatment. The stability of thin film was assessed by the repeated use of Nanocomposite thin films and results were indicated that the degradation of tetracycline or sulfamethoxazole was almost unaffected at least for six cycles of photocatalytic operations. The presence of several cations and anions in the degradation of these antibiotics was studied. Additionally, the presence of 2-propanol and EDTA inhibited significantly the degradation of these micro-pollutants i.e., the percentage of degradation was decreased by 31.8 and 24.2% (for tetracycline) and 42.8 and 39.9% (for sulfamethoxazole), respectively. This indicated that the degradation of tetracycline or sulfamethoxazole was predominantly proceeded by the OH radicals; generated at the valance and conduction band of semiconductor. Similarly, the presence of sodium azide inhibited the percentage removal of these antibiotics.
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Affiliation(s)
- Alka Tiwari
- Department of Physics, National Institute of Technology, Aizawl, 796001, India
| | - Alok Shukla
- Department of Physics, National Institute of Technology, Aizawl, 796001, India
| | - Diwakar Tiwari
- Department of Chemistry, School of Physical Sciences, Mizoram University, Aizawl, 796004, India.
| | - Seung Mok Lee
- Department of Health and Environment, Catholic Kwandong University, 24, Beomil-ro 579beon-gil, Gangneung 210-701, South Korea
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22
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Marcelo G, Ferreira IC, Viveiros R, Casimiro T. Development of itaconic acid-based molecular imprinted polymers using supercritical fluid technology for pH-triggered drug delivery. Int J Pharm 2018. [PMID: 29526621 DOI: 10.1016/j.ijpharm.2018.03.010] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A novel pH-responsive molecularly imprinted polymer (MIP) based on Itaconic acid:Ethylene glycol dimethacrylate was developed as a potential body-friendly oral drug delivery system for metronidazole (MZ), a pH-independent drug. MIP performance was evaluated in a simulated oral administration situation, at pHs 2.2 and 7.4. Itaconic acid-based copolymers were synthesized using two different molar ratios of template:monomer:crosslinker (T:M:C), 1:5:25 and 1:5:50, in supercritical carbon dioxide (scCO2) in high yields. Further, impregnation of MZ was performed in scCO2 environment. Morphological and chemical properties of the copolymers produced were assessed by SEM, Morphologi G3 and FTIR analyses. Non-molecularly imprinted polymer (NIP) matrices presented swelling over time in opposition to the molecularly imprinted ones. In the scCO2-impregnation process, MIPs showed a significant molecular recognition towards MZ, presenting higher drug uptake ability with MZ loading of 18-61 wt% in MIPs, compared to 7-20 wt% in NIPs. In vitro drug release experiments presented different release profiles at the different pHs, where MZ-MIPs could release higher amounts of MZ at the lowest pH than at pH 7.4.
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Affiliation(s)
- Gonçalo Marcelo
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Inês C Ferreira
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Raquel Viveiros
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Teresa Casimiro
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal.
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Santana DR, Espino-Estévez M, Santiago DE, Méndez J, González-Díaz O, Doña-Rodríguez J. Treatment of aquaculture wastewater contaminated with metronidazole by advanced oxidation techniques. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.enmm.2017.04.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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24
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Pathak M, Coombes AGA, Ryu B, Cabot PJ, Turner MS, Palmer C, Wang D, Steadman KJ. Sustained Simultaneous Delivery of Metronidazole and Doxycycline From Polycaprolactone Matrices Designed for Intravaginal Treatment of Pelvic Inflammatory Disease. J Pharm Sci 2017; 107:863-869. [PMID: 29100864 DOI: 10.1016/j.xphs.2017.09.033] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 09/04/2017] [Accepted: 09/19/2017] [Indexed: 11/18/2022]
Abstract
Poly(ɛ-caprolactone) (PCL) intravaginal matrices were produced for local delivery of a combination of antibacterials, by rapidly cooling a mixture of drug powders dispersed in PCL solution. Matrices loaded with different combinations of metronidazole (10%, 15%, and 20% w/w) and doxycycline (10% w/w) were evaluated in vitro for release behavior and antibacterial activity. Rapid "burst release" of 8%-15% of the doxycycline content and 31%-37% of the metronidazole content occurred within 24 h when matrices were immersed in simulated vaginal fluid at 37°C. The remaining drug was extracted gradually over 14 days to a maximum of 65%-73% for doxycycline and 62%-71% for metronidazole. High levels of antibacterial activity up to 89%-91% against Gardnerella vaginalis and 84%-92% against Neisseria gonorrhoeae were recorded in vitro for release media collected on day 14, compared to "nonformulated" metronidazole and doxycycline solutions. Based on the in vitro data, the minimum levels of doxycycline and metronidazole released from PCL matrices in the form of intravaginal rings into vaginal fluid in vivo were predicted to exceed the minimum inhibitory concentrations for N. gonorrhea (reported range 0.5-4.0 μg/mL) and G. vaginalis (reported range 2-12.8 μg/mL) respectively, which are 2 of the major causative agents for pelvic inflammatory disease.
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Affiliation(s)
- Meenakshi Pathak
- The University of Queensland, School of Pharmacy, 20 Cornwall Street, Woolloongabba, Brisbane, Queensland 4102, Australia.
| | - Allan G A Coombes
- The University of Queensland, School of Pharmacy, 20 Cornwall Street, Woolloongabba, Brisbane, Queensland 4102, Australia
| | - BoMi Ryu
- The University of Queensland, School of Pharmacy, 20 Cornwall Street, Woolloongabba, Brisbane, Queensland 4102, Australia
| | - Peter J Cabot
- The University of Queensland, School of Pharmacy, 20 Cornwall Street, Woolloongabba, Brisbane, Queensland 4102, Australia
| | - Mark S Turner
- The University of Queensland, School of Agriculture and Food Sciences, St. Lucia, Brisbane, Queensland 4072, Australia
| | - Cheryn Palmer
- Princess Alexandra Hospital, Department of Sexual Health, Ipswich Road, Woolloongabba, Queensland 4102, Australia
| | - Dongjie Wang
- The University of Queensland, School of Agriculture and Food Sciences, St. Lucia, Brisbane, Queensland 4072, Australia
| | - Kathryn J Steadman
- The University of Queensland, School of Pharmacy, 20 Cornwall Street, Woolloongabba, Brisbane, Queensland 4102, Australia
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25
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Nanofibrillar cellulose hydrogels and reconstructed hydrogels as matrices for controlled drug release. Int J Pharm 2017; 532:269-280. [DOI: 10.1016/j.ijpharm.2017.09.002] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 08/31/2017] [Accepted: 09/01/2017] [Indexed: 11/24/2022]
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26
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Xu H, Mi HY, Guan MM, Shan HY, Fei Q, Huan YF, Zhang ZQ, Feng GD. Residue analysis of tetracyclines in milk by HPLC coupled with hollow fiber membranes-based dynamic liquid-liquid micro-extraction. Food Chem 2017; 232:198-202. [DOI: 10.1016/j.foodchem.2017.04.021] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 08/11/2016] [Accepted: 04/02/2017] [Indexed: 10/19/2022]
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27
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Leng Y, Bao J, Chang G, Zheng H, Li X, Du J, Snow D, Li X. Biotransformation of tetracycline by a novel bacterial strain Stenotrophomonas maltophilia DT1. JOURNAL OF HAZARDOUS MATERIALS 2016; 318:125-133. [PMID: 27420384 DOI: 10.1016/j.jhazmat.2016.06.053] [Citation(s) in RCA: 123] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Revised: 06/06/2016] [Accepted: 06/27/2016] [Indexed: 05/22/2023]
Abstract
Although several abiotic processes have been reported that can transform antibiotics, little is known about whether and how microbiological processes may degrade antibiotics in the environment. This work isolated one tetracycline degrading bacterial strain, Stenotrophomonas maltophilia strain DT1, and characterized the biotransformation of tetracycline by DT1 under various environmental conditions. The biotransformation rate was the highest when the initial pH was 9 and the reaction temperature was at 30°C, and can be described using the Michaelis-Menten model under different initial tetracycline concentrations. When additional substrate was present, the substrate that caused increased biomass resulted in a decreased biotransformation rate of tetracycline. According to disk diffusion tests, the biotransformation products of tetracycline had lower antibiotic potency than the parent compound. Six possible biotransformation products were identified, and a potential biotransformation pathway was proposed that included sequential removal of N-methyl, carbonyl, and amine function groups. Results from this study can lead to better estimation of the fate and transport of antibiotics in the environment and has the potential to be utilized in designing engineering processes to remove tetracycline from water and soil.
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Affiliation(s)
- Yifei Leng
- School of Environment Studies, China University of Geosciences, Wuhan 430074, PR China; Department of Civil Engineering, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Jianguo Bao
- School of Environment Studies, China University of Geosciences, Wuhan 430074, PR China.
| | - Gaofeng Chang
- Tianjin Environmental Protection Technical Development Center, Tianjin 300191, PR China
| | - Han Zheng
- School of Environment Studies, China University of Geosciences, Wuhan 430074, PR China
| | - Xingxing Li
- School of Environment Studies, China University of Geosciences, Wuhan 430074, PR China
| | - Jiangkun Du
- School of Environment Studies, China University of Geosciences, Wuhan 430074, PR China
| | - Daniel Snow
- Water Sciences Laboratory, University of Nebraska-Lincoln, Lincoln, NE, 68583, USA
| | - Xu Li
- Department of Civil Engineering, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA.
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Samide A, Tutunaru B, Cioateră N, Vladu AC, Spinu C, Tigae C. Catalytic Activity of Thallium on Electrochemical Degradation of Metronidazole from Aqueous Solutions. CHEM ENG COMMUN 2016. [DOI: 10.1080/00986445.2016.1168818] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Adriana Samide
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Craiova, Craiova, Romania
| | - Bogdan Tutunaru
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Craiova, Craiova, Romania
| | - Nicoleta Cioateră
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Craiova, Craiova, Romania
| | - Ana-Cristina Vladu
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Craiova, Craiova, Romania
- Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, Cluj-Napoca, Romania
| | - Cezar Spinu
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Craiova, Craiova, Romania
| | - Cristian Tigae
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Craiova, Craiova, Romania
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29
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Tung NT, Pham TMH, Nguyen TH, Pham TT, Nguyen TQ. Pectin/HPMC dry powder coating formulations for colon specific targeting tablets of metronidazole. J Drug Deliv Sci Technol 2016. [DOI: 10.1016/j.jddst.2016.03.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Tetracycline-Containing MCM-41 Mesoporous Silica Nanoparticles for the Treatment of Escherichia coli. Molecules 2015; 20:19690-8. [PMID: 26528964 PMCID: PMC6332305 DOI: 10.3390/molecules201119650] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Revised: 10/21/2015] [Accepted: 10/22/2015] [Indexed: 11/17/2022] Open
Abstract
Tetracycline (TC) is a well-known broad spectrum antibiotic, which is effective against many Gram positive and Gram negative bacteria. Controlled release nanoparticle formulations of TC have been reported, and could be beneficial for application in the treatment of periodontitis and dental bone infections. Furthermore, TC-controlled transcriptional regulation systems (Tet-on and Tet-off) are useful for controlling transgene expression in vitro and in vivo for biomedical research purposes; controlled TC release systems could be useful here, as well. Mesoporous silica nanomaterials (MSNs) are widely studied for drug delivery applications; Mobile crystalline material 41 (MCM-41), a type of MSN, has a mesoporous structure with pores forming channels in a hexagonal fashion. We prepared 41 ± 4 and 406 ± 55 nm MCM-41 mesoporous silica nanoparticles with loaded TC for controlled drug release; TC content in the TC-MCM-41 nanoparticles was 18.7% and 17.7% w/w, respectively. Release of TC from TC-MCM-41 nanoparticles was then measured in phosphate-buffered saline (PBS), pH 7.2, at 37 °C over a period of 5 h. Most antibiotic was released from both over this observation period; however, the majority of TC was released over the first hour. Efficacy of the TC-MCM-41 nanoparticles was then shown to be superior to free TC against Escherichia coli (E. coli) in culture over a 24 h period, while blank nanoparticles had no effect.
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Ferreira AO, Polonini HC, Silva SL, Patrício FB, Brandão MAF, Raposo NRB. Feasibility of amlodipine besylate, chloroquine phosphate, dapsone, phenytoin, pyridoxine hydrochloride, sulfadiazine, sulfasalazine, tetracycline hydrochloride, trimethoprim and zonisamide in SyrSpend(®) SF PH4 oral suspensions. J Pharm Biomed Anal 2015; 118:105-112. [PMID: 26540625 DOI: 10.1016/j.jpba.2015.10.032] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 10/05/2015] [Accepted: 10/19/2015] [Indexed: 11/18/2022]
Abstract
The objective of this study was to evaluate the feasibility of 10 commonly used active pharmaceutical ingredients (APIs) compounded in oral suspensions using an internationally used suspending vehicle (SyrSpend(®) SF PH4 liquid): (i) amlodipine, (as besylate) 1.0mg/mL; (ii) chloroquine phosphate,15.0 mg/mL; (iii) dapsone, 2.0 mg/mL; (iv) phenytoin, 15.0 mg/mL; (v) pyridoxine hydrochloride, 50.0 mg/mL; (vi) sulfadiazine, 100.0 mg/mL; (vii) sulfasalazine, 100.0 mg/mL; (viii) tetracycline hydrochloride, 25.0 mg/mL; (ix) trimethoprim, 10.0 mg/mL; and (x) zonisamide, 10.0 mg/mL. All suspensions were stored both at controlled refrigeration (2-8 °C) and controlled room temperature (20-25 °C). Feasibility was assessed by measuring the percent recovery at varying time points throughout a 90-day period. API quantification was performed by high-performance liquid chromatography (HPLC-UV), via a stability-indicating method. Given the percentage of recovery of the APIs within the suspensions, the expiration date of the final products (API+vehicle) was at least 90 days for all suspensions with regard to both the controlled temperatures. This suggests that the vehicle is stable for compounding APIs from different pharmacological classes.
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Affiliation(s)
- Anderson O Ferreira
- Ortofarma-Quality Control Laboratories, Matias Barbosa, MG, Brazil; NUPICS-Núcleo de Pesquisa e Inovação em Ciências da Saúde, Federal University of Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Hudson C Polonini
- Ortofarma-Quality Control Laboratories, Matias Barbosa, MG, Brazil; NUPICS-Núcleo de Pesquisa e Inovação em Ciências da Saúde, Federal University of Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Sharlene L Silva
- Ortofarma-Quality Control Laboratories, Matias Barbosa, MG, Brazil
| | | | - Marcos Antônio F Brandão
- Ortofarma-Quality Control Laboratories, Matias Barbosa, MG, Brazil; NUPICS-Núcleo de Pesquisa e Inovação em Ciências da Saúde, Federal University of Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Nádia R B Raposo
- Ortofarma-Quality Control Laboratories, Matias Barbosa, MG, Brazil; NUPICS-Núcleo de Pesquisa e Inovação em Ciências da Saúde, Federal University of Juiz de Fora, Juiz de Fora, MG, Brazil.
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32
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Hernández-Jiménez A, Roa-Morales G, Reyes-Pérez H, Balderas-Hernández P, Barrera-Díaz CE, Bernabé-Pineda M. Voltammetric Determination of Metronidazole Using a Sensor Based on Electropolymerization of α-Cyclodextrin over a Carbon Paste Electrode. ELECTROANAL 2015. [DOI: 10.1002/elan.201500452] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Iannuccelli V, Maretti E, Montorsi M, Rustichelli C, Sacchetti F, Leo E. Gastroretentive montmorillonite-tetracycline nanoclay for the treatment of Helicobacter pylori infection. Int J Pharm 2015; 493:295-304. [PMID: 26238817 DOI: 10.1016/j.ijpharm.2015.06.049] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 06/25/2015] [Indexed: 12/23/2022]
Abstract
The paper aims to explore the potential benefits provided by an organically modified montmorillonite (nanoclay) in the problematic management of the Helicobacter pylori gastric infection that is one of the most prevalent infectious diseases worldwide. Two nanoclay samples were produced by the intercalation of tetracycline (TC) into the interlayer of montmorillonite (MM) under two different pH reaction conditions (pH 3.0 and 8.7). MM/TC nanoclays were characterized by EDX, XRD, FTIR, DSC, drug adsorption extent, in vitro mucoadhesiveness and desorption in simulated gastric media. The reaction between MM and TC led to a complete MM cation (Na(+) and Ca(2+)) exchange process, an increase of MM characteristic interlayer spacing as well as an involvement of NHR3(+) group of TC, regardless of the reaction pH value. However, MM/TC nanoclay obtained under alkaline conditions provided a lower TC adsorption as well as a drug fraction weakly linked to MM in comparison with the nanoclay obtained in acidic conditions. Both the nanoclays exhibited good mucoadhesion properties to porcine mucin and TC desorption occurring mainly via a cation exchange process by H(+) ions. Based on the results obtained, TC intercalation into MM nanoplatelets could represent a potential advantageous approach allowing the antibiotic to distribute homogeneously on the gastric mucosa, diffuse through the gastric mucus layer and achieve the microorganism localization.
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Affiliation(s)
- Valentina Iannuccelli
- Department of Life Sciences, University of Modena and Reggio Emilia, Italy, via Campi 103, 41125 Modena, Italy.
| | - Eleonora Maretti
- Department of Life Sciences, University of Modena and Reggio Emilia, Italy, via Campi 103, 41125 Modena, Italy
| | - Monia Montorsi
- Department of Engineering Sciences and Methods, University of Modena and Reggio Emilia, via Amendola 2, 42122 Reggio Emilia, Italy.
| | - Cecilia Rustichelli
- Department of Life Sciences, University of Modena and Reggio Emilia, Italy, via Campi 103, 41125 Modena, Italy
| | - Francesca Sacchetti
- Department of Life Sciences, University of Modena and Reggio Emilia, Italy, via Campi 103, 41125 Modena, Italy
| | - Eliana Leo
- Department of Life Sciences, University of Modena and Reggio Emilia, Italy, via Campi 103, 41125 Modena, Italy
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Development of an ELISA and Immunochromatographic Assay for Tetracycline, Oxytetracycline, and Chlortetracycline Residues in Milk and Honey Based on the Class-Specific Monoclonal Antibody. FOOD ANAL METHOD 2015. [DOI: 10.1007/s12161-015-0262-z] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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35
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Abourehab MAS, Khaled KA, Sarhan HAA, Ahmed OAA. Evaluation of combined famotidine with quercetin for the treatment of peptic ulcer: in vivo animal study. DRUG DESIGN DEVELOPMENT AND THERAPY 2015; 9:2159-69. [PMID: 25926722 PMCID: PMC4403742 DOI: 10.2147/dddt.s81109] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The aim of this work was to prepare a combined drug dosage form of famotidine (FAM) and quercetin (QRT) to augment treatment of gastric ulcer. FAM was prepared as freeze-dried floating alginate beads using ion gelation method and then coated with Eudragit RL100 to sustain FAM release. QRT was prepared as solid dispersion with polyvinyl pyrrolidone K30 to improve its solubility. Photo images and scanning electron microscope images of the prepared beads were carried out to detect floating behavior and to reveal surface and core shape of the prepared beads. Anti-ulcerogenic effect and histopathological examination of gastric tissues were carried out to investigate the effect of the combined drug formulation compared with commercial FAM tablets and FAM beads. Gastric glutathione (GSH), superoxide dismutase, catalase, tissue myeloperoxidase, and lipid peroxidation enzyme activities and levels in rat stomach tissues were also determined. Results revealed that spherical beads were formed with an average diameter of 1.64±0.33 mm. They floated immediately with no lag time before floating, and remained buoyant throughout the test period. Treatment with a combination of FAM beads plus QRT showed the absence of any signs of inflammation or hemorrhage, and significantly prevented the indomethacin-induced decrease in GSH levels (P<0.05) with regain of normal GSH gastric tissue levels. Also, there was a significant difference in the decrease of malondialdehyde level compared to FAM commercial tablets or beads alone (P<0.05). The combined formula significantly improved the myeloperoxidase level compared to both the disease control group and commercial FAM tablet-treated group (P<0.05). Formulation of FAM as floating beads in combination with solid dispersion of QRT improved the anti-ulcer activity compared to commercially available tablets, which reveals a promising application for treatment of peptic ulcer.
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Affiliation(s)
- Mohammed A S Abourehab
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Minia University, Minia, Egypt ; Department of Pharmaceutics, Faculty of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Khaled A Khaled
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Minia University, Minia, Egypt
| | - Hatem A A Sarhan
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Minia University, Minia, Egypt
| | - Osama A A Ahmed
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Minia University, Minia, Egypt ; Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
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Wagil M, Maszkowska J, Białk-Bielińska A, Caban M, Stepnowski P, Kumirska J. Determination of metronidazole residues in water, sediment and fish tissue samples. CHEMOSPHERE 2015; 119 Suppl:S28-S34. [PMID: 24412503 DOI: 10.1016/j.chemosphere.2013.12.061] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Revised: 11/28/2013] [Accepted: 12/13/2013] [Indexed: 06/03/2023]
Abstract
Metronidazole (MNZ) is an antibacterial and antiprotozoal drug used in veterinary and human medicine. Its continual entry into the environment and its biological properties may have significant, long-term effects on the stability of ecosystems because MNZ and its metabolites possess mutagenic, carcinogenic and toxic properties. For this reason, the application of MNZ in food-producing species is prohibited in the EU, the USA and other countries. To ensure human food safety and to protect the environment, robust and reliable screening and confirmatory tests capable of the low-level detection of MNZ residues are required. The development of methods for MNZ determination in biological and environmental samples is thus an important analytical task in environmental and food science. This work focuses on the evaluation of a method for determining MNZ in water, sediment and fish tissue samples using liquid chromatography--ion trap mass spectrometry (LC-MS/MS). MNZ was extracted from waters on Strata XC cartridges using solid phase extraction (SPE), and from sediments and fish tissues by solid-liquid extraction (sediment: 15 mL 0.1 M HCl (pH=0.6), 15 min; fish tissue: 15 mL 1% CH3COOH in ACN, 1 min; drying: 5 g MgSO4(anhyd.; 30 s) with SPE purification of the extracts (from sediment: Strata XC cartridge; from fish tissue: Supelco NH2 cartridge). The optimal procedure that we developed was validated in order to confirm its reliability and sensitivity. Matrix effects (ME) were established. Absolute recoveries ranged from 89.3% to 97.2%, and the method detection limits were 3.4 ng L(-1) (water samples), 0.4 ng g(-1) (sediment samples) and 0.3 ng g(-1) (tissue samples). These methods were used to determine MNZ in surface waters, sediments and fish tissues from the Polish River Gościcina; MNZ was found in all these matrices. The highest concentrations in water, sediment and tissue were 136.2 ng L(-1), 12.0 ng g(-1) and 1.5 ng g(-1) respectively. The results confirmed that these methods are suitable for the simultaneous analysis of waters, sediments and fish tissues for the presence of MNZ.
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Affiliation(s)
- Marta Wagil
- Institute for Environmental and Human Health Protection, Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Joanna Maszkowska
- Institute for Environmental and Human Health Protection, Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Anna Białk-Bielińska
- Institute for Environmental and Human Health Protection, Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland.
| | - Magda Caban
- Institute for Environmental and Human Health Protection, Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Piotr Stepnowski
- Institute for Environmental and Human Health Protection, Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Jolanta Kumirska
- Institute for Environmental and Human Health Protection, Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
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Russo MG, Brusau EV, Ellena J, Narda GE. Solid-state supramolecular synthesis based on the N-H…O heterosynthon: an approach to solve the polymorphism problem in famotidine. J Pharm Sci 2014; 103:3754-3763. [PMID: 25277273 DOI: 10.1002/jps.24196] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Revised: 09/07/2014] [Accepted: 09/12/2014] [Indexed: 11/11/2022]
Abstract
Famotidine (FMT), a histamine H2 -receptor antagonist, is a drug commonly used in treatments of gastroesophageal diseases that presents solid-state polymorphism (A and B forms), the marketed form being the metastable polymorph B. A new stable salt was obtained by combination of FMT and maleic acid as coformer. FMT maleate (FMT-MLT) was prepared either by solvent evaporation or comilling methods. Single-crystal X-ray diffraction reveals that (FMT)(+) in FMT-MLT adopts an extended conformation that is stabilized by classical and nonclassical H-bonds. The three-dimensional packing consists of tapes along the axis b that further develop a columnar array based on H-bonds involving (FMT)(+) side chain. Nonconventional π-stacking interactions between adjacent tapes were also identified. Fourier transform infrared, differential scanning calorimetry, thermogravimetric analysis, polarized light thermal microscopy, and scanning electron microscopy were employed to characterize the multicomponent complex. According to the solubility values in water and simulated gastric fluid, FMT-MLT exhibits such a performance that improves on the solubility of the commercially available polymorph. Finally, the higher stability of FMT-MLT regarding both FMT forms, as well as its easy preparation from either A or B forms or a mixture of them, also allows to consider this salt as a valuable alternative to avoid the polymorphism issue in marketed formulations containing FMT.
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Affiliation(s)
- Marcos G Russo
- Química Inorgánica - INTEQUI. Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, San Luis 5700, Argentina
| | - Elena V Brusau
- Química Inorgánica - INTEQUI. Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, San Luis 5700, Argentina
| | - Javier Ellena
- Physics Institute of São Carlos, University of São Paulo, São Carlos, São Paulo, CP 369, 13560-970, Brazil
| | - Griselda E Narda
- Química Inorgánica - INTEQUI. Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, San Luis 5700, Argentina.
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Zuo J, Gao Y, Bou-Chacra N, Löbenberg R. Challenges and opportunities to use biowaivers to compare generics in China. AAPS PharmSciTech 2014; 15:1070-5. [PMID: 24848759 DOI: 10.1208/s12249-014-0133-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Accepted: 04/24/2014] [Indexed: 11/30/2022] Open
Abstract
Biowaivers for class I drugs according to the biopharmaceutics classification system (BCS) were first introduced in 2000. The in vitro equivalence can be used to document bioequivalence between products. This study compared the in vitro dissolution behavior of two BCS class I drugs, amoxicillin and metronidazole, which are sold in China. Identifying a reference product on the Chinese domestic market was impossible. Three 250-mg and two 500-mg amoxicillin capsules and four metronidazole tablet products were tested. None of the amoxicillin products and three of the four metronidazole tablets were found to be equivalent to each other when the same strengths were compared. The bioequivalence of products that fail the in vitro test can be established via in vivo clinical studies which are expensive and time consuming. Establishing nationally or globally accepted reference products may provide regulatory agencies with an efficient mechanism approving high quality generics.
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Aleanizy FS, Alqahtani F, Al Gohary O, El Tahir E, Al Shalabi R. Determination and characterization of metronidazole-kaolin interaction. Saudi Pharm J 2014; 23:167-76. [PMID: 25972737 PMCID: PMC4421081 DOI: 10.1016/j.jsps.2014.06.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Accepted: 06/22/2014] [Indexed: 11/19/2022] Open
Abstract
The needs for safe, therapeutically effective antidiarrheal combination continuously lead to effective treatment. When administered simultaneously, metronidazole-kaolin interactions have been reported by FDA but not studied. This paper is the first to study metronidazole-kaolin interactions. Adsorption isotherms of a metronidazole-kaolin antidiarrheal combination from aqueous solutions at an in vivo simulated pH conditions were obtained at 37 ± 0.5 °C. Langmuir constants for the adsorption are 10.8225, 41.3223 mg g(-1) and 11.60, 2.56 l g(-1) aimed at the monolayer capacity, and the equilibrium constant at pH 1.2 and 6.8, respectively. pH effect on adsorption of known concentration of metronidazole by kaolin was also studied over the range 1.2-8. A gradual increase in the adsorbed amount was noted with increasing the pH. Elution studies by different eluents showed that drug recovery from adsorbent surface was pH-dependent via competitive mechanism. The elution followed the sequence: 0.1 M HCl > 0.1 M NaCl > H2O. Adsorption-desorption studies revealed physical adsorption. The equilibrium concentration of metronidazole decreased as the adsorbent concentration was increased in the systems. The dissolution profiles (USP) of commercially available tablets (Riazole® 500 mg) were obtained alone and in the presence of either (ORS®) rehydration salts and 9 or 18 g of kaolin powder. The percentage drug released versus time: 95.01% in 25 min, 101.02% in 30 min, 67.63% in 60 min, 60.59% in 60 min, respectively. The percentage drug released versus time was increased with ORS® due to common ion effect [Cl(-)], while, it was decreased with kaolin due to adsorption. The mechanism of reaction of Riazole® (500 mg) tablets in the different dissolution media, confirms with Korsmeyer-Peppas model. The interaction between metronidazole and kaolin was characterized by melting point determinations, differential scanning calorimetry analysis and infrared spectroscopy. The results obtained were suggestive of physical interaction between metronidazole and kaolin.
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Affiliation(s)
- Fadilah Sfouq Aleanizy
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
- Corresponding author. Tel.: +966 1180514.
| | - Fulwah Alqahtani
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Omaimah Al Gohary
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Eram El Tahir
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Rania Al Shalabi
- Pharmacy Department, King Faisal Specialized Hospital, Riyadh, Saudi Arabia
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Araújo M, Viveiros R, Correia TR, Correia IJ, Bonifácio VD, Casimiro T, Aguiar-Ricardo A. Natural melanin: A potential pH-responsive drug release device. Int J Pharm 2014; 469:140-5. [DOI: 10.1016/j.ijpharm.2014.04.051] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Revised: 04/17/2014] [Accepted: 04/19/2014] [Indexed: 01/20/2023]
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Effect of ionic crosslink on the release of metronidazole from partially carboxymethylated guar gum tablet. Carbohydr Polym 2014; 106:414-21. [DOI: 10.1016/j.carbpol.2014.01.033] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2013] [Revised: 12/23/2013] [Accepted: 01/11/2014] [Indexed: 11/19/2022]
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Rivadeneira J, Di Virgilio A, Audisio M, Boccaccini A, Gorustovich A. Evaluation of antibacterial and cytotoxic effects of nano-sized bioactive glass/collagen composites releasing tetracycline hydrochloride. J Appl Microbiol 2014; 116:1438-46. [DOI: 10.1111/jam.12476] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Revised: 02/04/2014] [Accepted: 02/11/2014] [Indexed: 01/30/2023]
Affiliation(s)
- J. Rivadeneira
- Grupo Interdisciplinario en Materiales- Universidad Católica de Salta (IESIING-UCASAL); Instituto de Tecnologías y Ciencias de Ingeniería-Universidad Buenos Aires-Consejo Nacional de Investigaciones Científicas y Técnicas (INTECIN UBA-CONICET); Salta Argentina
| | - A.L. Di Virgilio
- Cátedra de Bioquímica Patológica Facultad de Ciencias Exactas; Universidad Nacional de La Plata (UNLP); La Plata Argentina
| | - M.C. Audisio
- Instituto de Investigaciones para la Industria Química - Consejo Nacional de Investigaciones Científicas y Técnicas (INIQUI - CONICET); Universidad Nacional de Salta (UNSa); Salta Argentina
| | - A.R. Boccaccini
- Institute of Biomaterials; University of Erlangen-Nuremberg; Erlangen Germany
| | - A.A. Gorustovich
- Grupo Interdisciplinario en Materiales- Universidad Católica de Salta (IESIING-UCASAL); Instituto de Tecnologías y Ciencias de Ingeniería-Universidad Buenos Aires-Consejo Nacional de Investigaciones Científicas y Técnicas (INTECIN UBA-CONICET); Salta Argentina
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Aman RM, Meshali MM, Abdelghani GM. Ion-exchange complex of famotidine: sustained release and taste masking approach of stable liquid dosage form. Drug Discov Ther 2014; 8:268-75. [DOI: 10.5582/ddt.2014.01043] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Calabrese I, Cavallaro G, Scialabba C, Licciardi M, Merli M, Sciascia L, Turco Liveri ML. Montmorillonite nanodevices for the colon metronidazole delivery. Int J Pharm 2013; 457:224-36. [PMID: 24076230 DOI: 10.1016/j.ijpharm.2013.09.017] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Revised: 09/11/2013] [Accepted: 09/15/2013] [Indexed: 11/19/2022]
Abstract
The adsorption profiles of the antibiotic metronidazole (MNE) into the K10-montmorillonite (MMT-K10) clay and the subsequent release have been investigated as a function of pH and MNE/MMT-K10 ratio, in order to evaluate the potential of the MNE/MMT-K10 hybrids as controlled drug delivery system. The adsorption mechanism has been first elucidated by performing complementary equilibrium and kinetic studies and through the X-ray diffractometry (XRD) characterization of the obtained composite materials. The gathered results allowed us to propose a mechanism consisting of a multi-step pathway involving the neutral and the cationic form of the drug, which interact with different sites of the clay surfaces, i.e. the interlayer region and the faces of the lamella. In a second step the drug release kinetics has been studied under physiological pH mimicking conditions simulating the oral drug administration and delivery. For the sake of comparison the commercial formulation has also been employed for the release studies. The investigation of the release profiles and the comparison with the commercial formulation of the drug reveal that the new-tailor made formulation could be fruitful exploited for successfully prolonged the action of drug in the desired site.
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Affiliation(s)
- Ilaria Calabrese
- Dipartimento di Fisica e Chimica, University of Palermo, Viale delle Scienze Ed. 17, 90128 Palermo, Italy
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Niu J, Li Y, Wang W. Light-source-dependent role of nitrate and humic acid in tetracycline photolysis: kinetics and mechanism. CHEMOSPHERE 2013; 92:1423-1429. [PMID: 23618345 DOI: 10.1016/j.chemosphere.2013.03.049] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2012] [Revised: 03/11/2013] [Accepted: 03/25/2013] [Indexed: 06/02/2023]
Abstract
To elucidate the environmental fate of tetracycline (TC), we reported the light-source-dependent dual effects of humic acid (HA) and NO3(-) on TC photolysis. TC photolysis rate was highly pH- and concentration-dependent, and was especially enhanced at higher pH and lower initial TC concentrations. Under UV-254 and UV-365 irradiation, HA inhibited TC photolysis through competitive photoabsorption or reactive oxygen species (ROS) quenching with TC; under solar and xenon lamp irradiation, TC photolysis was enhanced at low HA concentration due to its photosensitization, whereas was suppressed at high HA concentration due to competitive photoabsorption or ROS quenching with TC. Similarly, the effect of NO3(-) on TC photolysis varied with light irradiation conditions. Even under the same light irradiation conditions, the effects of HA or NO3(-) on TC photolysis varied with their concentrations. The electron spin resonance spectrometer and ROS scavenger experiments demonstrated that TC photolysis was involved in O2(-)-mediated self-sensitized photolysis. The photolysis pathways were involved in hydroxylation and loss of some groups. More toxic intermediates than TC were generated under different light irradiation conditions. These results can provide insight into the potential fate and transformation of TC in surficial waters.
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Affiliation(s)
- Junfeng Niu
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, PR China.
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46
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Ratanajanchai M, Tanwilai D, Sunintaboon P. Visible light-induced surfactant-free emulsion polymerization using camphorquinone/tertiary amine as the initiating system for the synthesis of amine-functionalized colloidal nanoparticles. J Colloid Interface Sci 2013; 409:25-31. [PMID: 23978285 DOI: 10.1016/j.jcis.2013.07.043] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Revised: 07/15/2013] [Accepted: 07/16/2013] [Indexed: 01/23/2023]
Abstract
A visible light-induced surfactant-free emulsion polymerization (SFEP) was developed as an alternative pathway for the preparation of amine-functionalized nanoparticles by using the photo-initiating system consisting of camphorquinone coupled with tertiary amine (CQ/3°-amine). Water-soluble macromolecules containing 3°-amines were used as the sources of 3°-amine species, which not only function with CQ to generate initiating free radicals, but also provide colloidal stabilization to the resulting colloidal products. The prepared nanoparticles showed uniformed size distribution and good colloidal stability with positively charged surface. For SFEP induced by CQ/polyethyleneimine (PEI) photo-redox couple, the polymerization of methyl methacrylate (MMA) was affected by both light intensity and initiator concentration. In addition, to obtain higher solid content products, the weight ratio of PEI:MMA=1:4 was employed. Finally, an opportunity for immobilizing various amine containing polymers by our photo-induced SFEP was evaluated. The achievement of this SFEP also depended on 3°-amine content of the macromolecules used.
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Affiliation(s)
- Montri Ratanajanchai
- Department of Chemistry, Faculty of science, Mahidol University, Phuttamonthon 4 Road, Nakhon Pathom 73170, Thailand.
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Lin CH, Fang YP, Al-Suwayeh SA, Yang SY, Fang JY. Percutaneous Absorption and Antibacterial Activities of Lipid Nanocarriers Loaded with Dual Drugs for Acne Treatment. Biol Pharm Bull 2013; 36:276-86. [DOI: 10.1248/bpb.b12-00793] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Chih-Hung Lin
- Center for General Education, Chang Gung University of Science and Technology
| | | | | | - Shih-Yung Yang
- Pharmaceutics Laboratory, Graduate Institute of Natural Products, Chang Gung University
- Chinese Herbal Medicine Research Team, Healthy Aging Research Center, Chang Gung University
| | - Jia-You Fang
- Pharmaceutics Laboratory, Graduate Institute of Natural Products, Chang Gung University
- Department of Cosmetic Science, Chang Gung University of Science and Technology
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48
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Anadón A, Gamboa F, Martínez MA, Castellano V, Martínez M, Ares I, Ramos E, Suarez FH, Martínez-Larrañaga MR. Plasma disposition and tissue depletion of chlortetracycline in the food producing animals, chickens for fattening. Food Chem Toxicol 2012; 50:2714-21. [PMID: 22595330 DOI: 10.1016/j.fct.2012.05.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Revised: 04/26/2012] [Accepted: 05/03/2012] [Indexed: 10/28/2022]
Abstract
Chickens were used to investigate plasma disposition of chlortetracycline after single IV (15 mg/kg) and multiple oral administration (60 mg/kg, 5 days) and residue depletion of chlortetracycline after multiple oral doses (60 mg/kg, 5 days). Plasma and tissue samples were analyzed by HPLC. Mean elimination half-lives in plasma were 7.96 and 13.15 h after IV and multiple oral administration. Maximum plasma concentration was 4.33 μg/ml and the interval from oral administration until maximal concentration was 1.79 h. Oral bioavailability was 17.76%. After multiple oral dose, mean kidney, liver and muscle tissue concentrations of chlortetracycline+4-epi-chlortetracycline of 835.3, 192.7, and 126.3 μg/kg, respectively, were measured 1 day after administration of the final dose of chlortetracycline. Chlortetracycline residues were detected in kidney and liver (205.4 and 81.7 μg/kg, respectively), but not in muscle, 3 days after the end of chlortetracycline treatment. The mean chlortetracycline+4-epi-chlortetracycline concentrations were below LOQ at 3 and 5 days after cessation of medication in muscle and liver, respectively. A withdrawal time of 3 days was necessary to ensure that the chlortetracycline residues were less than the maximal residue limits (MRLs) established by the European Union (100, 300, and 600 μg/kg in muscle, liver, and kidney, respectively).
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Affiliation(s)
- Arturo Anadón
- Department of Toxicology and Pharmacology, Faculty of Veterinary Medicine, Universidad Complutense de Madrid, 28040 Madrid, Spain.
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Direct encapsulation of small molecule hydrophilic and hydrophobic actives in alginate microspheres using a novel impinging aerosols method. J Drug Deliv Sci Technol 2012. [DOI: 10.1016/s1773-2247(12)50018-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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50
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Du B, Daniels VR, Vaksman Z, Boyd JL, Crady C, Putcha L. Evaluation of physical and chemical changes in pharmaceuticals flown on space missions. AAPS J 2011; 13:299-308. [PMID: 21479701 PMCID: PMC3085701 DOI: 10.1208/s12248-011-9270-0] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2010] [Accepted: 03/24/2011] [Indexed: 11/30/2022] Open
Abstract
Efficacy and safety of medications used for the treatment of astronauts in space may be compromised by altered stability in space. We compared physical and chemical changes with time in 35 formulations contained in identical pharmaceutical kits stowed on the International Space Station (ISS) and on Earth. Active pharmaceutical content (API) was determined by ultra- and high-performance liquid chromatography after returning to Earth. After stowage for 28 months in space, six medications aboard the ISS and two of matching ground controls exhibited changes in physical variables; nine medications from the ISS and 17 from the ground met the United States Pharmacopeia (USP) acceptance criteria for API content after 28 months of storage. A higher percentage of medications from each flight kit had lower API content than the respective ground controls. The number of medications failing API requirement increased as a function of time in space, independent of expiration date. The rate of degradation was faster in space than on the ground for many of the medications, and most solid dosage forms met USP standard for dissolution after storage in space. Cumulative radiation dose was higher and increased with time in space, whereas temperature and humidity remained similar to those on the ground. Exposure to the chronic low dose of ionizing radiation aboard the spacecraft as well as repackaging of solid dosage forms in flight-specific dispensers may adversely affect stability of pharmaceuticals. Characterization of degradation profiles of unstable formulations and identification of chemical attributes of stability in space analog environments on Earth will facilitate development of space-hardy medications.
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Affiliation(s)
- Brian Du
- />Wyle Integrated Science and Engineering Group, 1290 Hercules Drive, Suite 120, Houston, Texas 77058–2769 USA
| | - Vernie R. Daniels
- />Wyle Integrated Science and Engineering Group, 1290 Hercules Drive, Suite 120, Houston, Texas 77058–2769 USA
| | - Zalman Vaksman
- />Texas Medical Center, University of Texas, Houston, Texas 77025 USA
| | - Jason L. Boyd
- />Universities Space Research Association, Houston, Texas 77058 USA
| | - Camille Crady
- />Wyle Integrated Science and Engineering Group, 1290 Hercules Drive, Suite 120, Houston, Texas 77058–2769 USA
| | - Lakshmi Putcha
- />Pharmacotherapeutics Laboratory, SK/Human Adaptation and Countermeasures Division, NASA Johnson Space Center, 2101 NASA Parkway, Houston, Texas 77058 USA
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