1
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Improving hygroscopic stability of palmatine by replacing Clˉ and preparing single crystal of palmatine-salicylic acid. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132521] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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2
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Lee SH, Kim JE. Quality by Design Applied Development of Immediate-Release Rabeprazole Sodium Dry-Coated Tablet. Pharmaceutics 2021; 13:pharmaceutics13020259. [PMID: 33673019 PMCID: PMC7918775 DOI: 10.3390/pharmaceutics13020259] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 02/07/2021] [Accepted: 02/08/2021] [Indexed: 11/30/2022] Open
Abstract
The aim of this study was to develop immediate-release oral rabeprazole sodium tablets with rapid efficacy and gastric stability for the treatment of gastroesophageal reflux disease. Rabeprazole sodium is a commonly prescribed proton pump inhibitor; however, it is extremely unstable and degrades in acidic environments. Hence, it has been manufactured and supplied only in enteric-coated tablet form, while immediate-release (IR) formulations for this drug are very limited. In this study, we applied the quality by design (QbD) approach to formulate and optimize an IR dry-coated tablet containing rabeprazole sodium as an inner core with an outer sodium bicarbonate layer to stabilize the active pharmaceutical ingredient at gastric pH. We also investigated the stability of the pharmaceutical dosage form and its pharmacokinetic profile. The results show that the developed tablets are stable for approximately 12 months and have a high dissolution rate, greater than or equal to 90% at 30 min. Further, in vivo beagle pharmacokinetics confirmed that the newly developed IR tablet had an AUCt which is bioequivalent to the existing delayed-release rabeprazole tablet; however, its Tmax was 0.5 h, which is up to seven times faster than that of the existing tablet. Moreover, the IR tablet was found to immediately absorb in the stomach. Hence, the development of IR tablets can be used as a platform to overcome the technical and commercial limitations currently associated with various proton pump inhibitors used to treat patients with gastroesophageal reflux disease that require immediate therapeutic relief.
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Bakheit AH, Al-Kahtani HM, Albraiki S. Rabeprazole: A comprehensive profile. PROFILES OF DRUG SUBSTANCES, EXCIPIENTS, AND RELATED METHODOLOGY 2021; 46:137-183. [PMID: 33461697 DOI: 10.1016/bs.podrm.2020.07.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
Rabeprazole belongs to the class of anti-secretory drugs, with benzimidazoles substitution. These drugs induce gastric acid secretion through precise inhibition of the enzyme H+/K+-ATPase (acid or proton pump). This effect helps to treat and prevent conditions in which gastric acid directly aggravates symptoms such as duodenal and gastric ulcers. This chapter includes a comprehensive review of rabeprazole in terms of nomenclature, its physical-chemical properties, methods of preparation and ADME profiles. In addition, the chapter also includes a review of several methods for analysis of rebeprazole in its dosage forms and biological fluids.
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Affiliation(s)
- Ahmed H Bakheit
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh, Kingdom of Saudi Arabia; Department of Chemistry, Faculty of Science and Technology, Al-Neelain University, Khartoum, Sudan.
| | - Hamad M Al-Kahtani
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Salem Albraiki
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh, Kingdom of Saudi Arabia
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Yousefzadeh A, Abolhasani J, Hassanzadeh J, Somi MH. A Highly Efficient Chemiluminescence System Based on an Enhancing Effect of Ag Nanoclusters/Graphene Quantum Dots Mixture for Ultrasensitive Detection of Rabeprazole. ANAL SCI 2019; 35:385-391. [PMID: 30971635 DOI: 10.2116/analsci.18p419] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Herein, an efficient chemiluminescence (CL) reaction with a high emission intensity is reported based on a synergistic improving effect of silver nanoclusters (AgNCs) and graphene quantum dots (GQDs). First, the syntheses of AgNCs and GQDs were simply performed by the chemical reducing of AgNO3 and a thermal treatment of glucose, respectively. After the characterization steps, the beneficial behavior of the prepared nanomaterial was investigated in CL systems. The oxidation reaction of KMnO4-rhodamine B produced weak CL emission. However, the presence of AgNCs and GQDs led to a synergetic enhancing effect, and thus higher emission was obtained. A possible mechanism was investigated for this effect using absorption and fluorescence experiments. Furthermore, rabeprazole showed a relatively selective enhancing impact on the CL emission. The CL intensity was linearly increased in the rabeprazole concentration range of 4 - 133 ng mL-1 with a detection limit (3Sb/m) of 1.1 ng mL-1. The developed CL method was utilized for the measurement of Rbp in biological samples with acceptable precision and accuracy.
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Affiliation(s)
| | | | - Javad Hassanzadeh
- Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz
| | - Mohammad Hossein Somi
- Liver and Gastrointestinal Diseases Research Center, Tabriz University of Medical Sciences
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Etman SM, Elnaggar YSR, Abdelmonsif DA, Abdallah OY. Oral Brain-Targeted Microemulsion for Enhanced Piperine Delivery in Alzheimer's Disease Therapy: In Vitro Appraisal, In Vivo Activity, and Nanotoxicity. AAPS PharmSciTech 2018; 19:3698-3711. [PMID: 30238305 DOI: 10.1208/s12249-018-1180-3] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Accepted: 09/07/2018] [Indexed: 01/08/2023] Open
Abstract
Alzheimer's disease (AD) is a neurodegenerative disorder that has no cure till now. Piperine (PIP) is an alkaloid characterized by memory-enhancing properties but challenging oral delivery obstacles. The objectives of this study are as follows: preparation of microemulsion (ME) as a proposed oral PIP nanocarrier for treatment of Alzheimer's disease and testing its safety on the brain and other internal organs. This study employs bioactive surfactants in the common safe doses to improve PIP targeting to the brain. Selected ME systems encompassed Caproyl 90 (oil)/Tween 80/Cremophor RH 40 (surfactant) and Transcutol HP (co-surfactant). The particle size of the prepared formulations was less than 150 nm with negative zeta potential. The in vivo results showed a superior effect of ME over free PIP. Colchicine-induced brain toxicity results showed the safety of ME on brain cells. Nevertheless, toxicological results showed a potential ME nephrotoxicity. Oral microemulsion increased PIP efficacy and enhanced its delivery to the brain resulting in better therapeutic outcome compared to the free drug. However, the toxicity of this nanosystem should be carefully taken into consideration on chronic use.
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Van Nguyen H, Baek N, Lee BJ. Enhanced gastric stability of esomeprazole by molecular interaction and modulation of microenvironmental pH with alkalizers in solid dispersion. Int J Pharm 2017; 523:189-202. [DOI: 10.1016/j.ijpharm.2017.03.047] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 03/14/2017] [Accepted: 03/20/2017] [Indexed: 12/27/2022]
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7
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Choudhary S, Jain A, Amin MCIM, Mishra V, Agrawal GP, Kesharwani P. Stomach specific polymeric low density microballoons as a vector for extended delivery of rabeprazole and amoxicillin for treatment of peptic ulcer. Colloids Surf B Biointerfaces 2016; 141:268-277. [DOI: 10.1016/j.colsurfb.2016.01.048] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Revised: 12/20/2015] [Accepted: 01/26/2016] [Indexed: 12/18/2022]
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8
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Sanad RAEB, Mabrouk MI. Development and assessment of stable formulations containing two herbal antimicrobials: Allium sativum L. and Eruca sativa miller seed oils. Drug Dev Ind Pharm 2015; 42:958-68. [DOI: 10.3109/03639045.2015.1096280] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
| | - Mona Ibraheem Mabrouk
- Department of Microbiology, National Organization of Drug Control and Research (NODCAR), Giza, Egypt
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9
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Sabry S, Abdel-Hay M, Belal T, Mahgoub A. Development and validation of HPLC-DAD method for the simultaneous determination of amoxicillin, metronidazole and rabeprazole sodium. Application to spiked simulated intestinal fluid samples. ANNALES PHARMACEUTIQUES FRANÇAISES 2015; 73:351-60. [DOI: 10.1016/j.pharma.2015.04.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Revised: 04/18/2015] [Accepted: 04/22/2015] [Indexed: 12/19/2022]
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10
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Tsai TR, Cham TM, Wu YT. HPLC Determination of Lansoprazole and Method Application for the Formulation Development of Enteric-coated Lansoprazole Pellets. J CHIN CHEM SOC-TAIP 2015. [DOI: 10.1002/jccs.201500003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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11
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El-Fatatry HM, Mabrouk MM, Hewala II, Emam EH. Stability-indicating HPLC-DAD methods for determination of two binary mixtures: Rabeprazole sodium-mosapride citrate and rabeprazole sodium-itopride hydrochloride. J Pharm Anal 2014; 4:258-269. [PMID: 29403889 PMCID: PMC5761220 DOI: 10.1016/j.jpha.2013.09.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Accepted: 09/17/2013] [Indexed: 11/29/2022] Open
Abstract
Two selective stability-indicating HPLC methods are described for determination of rabeprazole sodium (RZ)–mosapride citrate (MR) and RZ–itopride hydrochloride (IO) mixtures in the presence of their ICH-stress formed degradation products. Separations were achieved on X-Bridge C18 column using two mobile phases: the first for RZ–MR mixture consisted of acetonitrile: 0.025 M KH2PO4 solution: TEA (30:69:1 v/v; pH 7.0); the second for RZ–IO mixture was at ratio of 25:74:1 (v/v; pH 9.25). The detection wavelength was 283 nm. The two methods were validated and validation acceptance criteria were met in all cases. Peak purity testing using contrast angle theory, relative absorbance and log A versus the wavelengths plots were presented. The % recoveries of the intact drugs were between 99.1% and 102.2% with RSD% values less than 1.6%. Application of the proposed HPLC methods indicated that the methods could be adopted to follow the stability of their formulations.
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Affiliation(s)
- Hamed M El-Fatatry
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, University of Tanta, Tanta, Egypt
| | - Mokhtar M Mabrouk
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, University of Tanta, Tanta, Egypt
| | - Ismail I Hewala
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, University of Alexandria, Egypt
| | - Ehab H Emam
- Quality Sector, Alexandria Company for Pharmaceuticals, Alexandria 21521, Egypt
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12
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Human P450-like oxidation of diverse proton pump inhibitor drugs by ‘gatekeeper’ mutants of flavocytochrome P450 BM3. Biochem J 2014; 460:247-59. [DOI: 10.1042/bj20140030] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Structurally destabilizing and conformation altering ‘gatekeeper’ mutants of the biotechnologically important flavocytochrome P450 BM3 mono-oxygenase were shown to catalyse oxidation of several proton pump inhibitor drugs, and to generate products identical to those formed by major human drug metabolizing P450s.
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Xiong X, Wu M, Zhao X, Song Z. Revealing interaction between sulfobutylether-β-cyclodextrin and reserpine by chemiluminescence and site-directed molecular docking. LUMINESCENCE 2013; 29:621-5. [PMID: 24127401 DOI: 10.1002/bio.2594] [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: 06/16/2013] [Revised: 09/02/2013] [Accepted: 09/06/2013] [Indexed: 11/10/2022]
Abstract
The host-guest interaction between sulfobutylether-β-cyclodextrin (SBE-β-CD) and reserpine (RSP) is described using flow injection-chemiluminescence (FI-CL) and site-directed molecular docking methods. It was found that RSP could inhibit the CL intensity produced by a luminol/SBE-β-CD system. The decrease in CL intensity was logarithmic over an RSP concentration range of 0.03 to 700.0 nM, giving a regression equation of ∆I = 107.1lgCRES + 186.1 with a detection limit of 10 pM (3σ). The CL assay was successfully applied in the determination of RSP in injection, saliva and urine samples with recoveries in the range 93.5-106.1%. Using the proposed CL model, the binding constant (KCD-R ) and the stoichiometric ratio of SBE-β-CD/RSP were calculated to be 7.4 × 10(6) M(-1) and 1 : 1, respectively. Using molecular docking, it was confirmed that luminol binds to the small cavity of SBE-β-CD with a nonpolar interaction, while RSP targeted the larger cavity of SBE-β-CD and formed a 1 : 1 complex with hydrogen bonds. The proposed new CL method has the potential to become a powerful tool for revealing the host-guest interaction between CDs and drugs, as well as monitoring drugs with high sensitivity.
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Affiliation(s)
- Xunyu Xiong
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710069, China
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14
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Seshadri RK, Raghavaraju TV, Kumar YR, Babu BS, Venkatasubbaiah B, Chakravarthy IE. DEVELOPMENT AND VALIDATION OF A STABILITY INDICATING UPLC METHOD, IDENTIFICATION, AND CHARACTERIZATION OF THREE DEGRADANT IMPURITIES IN PHARMACEUTICAL DOSAGE FORM OF RABEPRAZOLE SODIUM. J LIQ CHROMATOGR R T 2013. [DOI: 10.1080/10826076.2012.720327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Raja Kumar Seshadri
- a Analytical Research and Development, Integrated Product Development , Dr. Reddy's Laboratories Ltd. , Hyderabad , India
- b Department of Chemistry , Rayalaseema University , Karnool , A.P. , India
| | - T. V. Raghavaraju
- a Analytical Research and Development, Integrated Product Development , Dr. Reddy's Laboratories Ltd. , Hyderabad , India
| | - Y. Ravindra Kumar
- a Analytical Research and Development, Integrated Product Development , Dr. Reddy's Laboratories Ltd. , Hyderabad , India
| | - B. Suresh Babu
- a Analytical Research and Development, Integrated Product Development , Dr. Reddy's Laboratories Ltd. , Hyderabad , India
| | - B. Venkatasubbaiah
- a Analytical Research and Development, Integrated Product Development , Dr. Reddy's Laboratories Ltd. , Hyderabad , India
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15
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Tirpude RN, Puranik PK. Rabeprazole sodium delayed-release multiparticulates: Effect of enteric coating layers on product performance. J Adv Pharm Technol Res 2012; 2:184-91. [PMID: 22171316 PMCID: PMC3217710 DOI: 10.4103/2231-4040.85539] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
Rabeprazole sodium is one of the most effective proton pump inhibitors (PPIs) used in antiulcer therapy. Like most other PPIs, owing to its acid-labile nature, the drug is formulated as enteric-coated dosage form. Conventional means of producing delayed release multiparticulate dosage forms of PPIs require large quantities of enteric polymer coatings. In the present study, in order to better evaluate the effect of polymeric coating on product performance, the pellet core structure and composition was kept constant. Four different enteric-coating formulations and designs were evaluated. Enteric-coated drug multiparticulates prepared with single polymeric coatings (acrylic or cellulosic) were compared with two different polymeric layer coatings to evaluate the effectiveness of latter coatings in more effectively producing a better rabeprazole sodium delayed-release pellet product. The pH-dependent, enteric acrylic, and cellulosic polymers were used either alone, in combination, or applied one over the other to impart delayed-release properties to the core drug pellets. It was demonstrated that dual delayed-release coating with two different enteric polymers—an inner acrylic coating followed by an outer cellulosic coating—yields the best product that provides all the desired physicochemical and drug dissolution characteristics.
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Affiliation(s)
- Rakesh N Tirpude
- Department of Pharmacy, Govt. College of Pharmacy, Osmanpura, Aurangabad, Maharashtra, India
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16
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Liu R, Liu Z, Zhang C, Zhang B. Gelucire44/14 as a novel absorption enhancer for drugs with different hydrophilicities: in vitro and in vivo improvement on transcorneal permeation. J Pharm Sci 2011; 100:3186-3195. [PMID: 21416467 DOI: 10.1002/jps.22540] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2010] [Revised: 01/29/2011] [Accepted: 02/08/2011] [Indexed: 11/12/2022]
Abstract
The objective of this study was to investigate the application of Gelucire44/14 as a novel absorption enhancer in ophthalmic drug delivery system. Six compounds, namely ribavirin, puerarin, mangiferin, berberin hydrochloride, baicalin, and curcumin in the order of increasing lipophilicity were selected as model drugs. The effect of Gelucire44/14 on transcorneal permeation was evaluated across excised rabbit cornea. Ocular irritation and precorneal retention time were assessed. Additionally, aqueous humor pharmacokinetic test was performed by microdialysis. The results indicated that Gelucire44/14, at a concentration of 0.05% or 0.1% (w/v), was found to maximally increase the apparent permeability coefficient by 6.47-, 4.14-, 3.50-, 3.97-, 2.92-, and 1.86-fold for ribavirin, puerarin, mangiferin, berberin hydrochloride, baicalin, and curcumin, respectively (p < 0.05). Moreover, Gelucire44/14 was nonirritant at broad concentrations of 0.025%-0.4% (w/v). Pharmacokinetic tests showed that Gelucire44/14 promoted ocular bioavailability of the compounds as indicated by 5.40-, 4.03-, 3.46-, 3.57-, 2.77-, and 1.77-fold maximal increase in the area under the curve for the drugs aforementioned, respectively (p < 0.01). Therefore, Gelucire44/14 exerted a significant improvement on the permeation of both hydrophilic and lipophilic compounds, especially hydrophilic ones. Hence, Gelucire44/14 can be considered as a safe and effective absorption enhancer for ophthalmic drug delivery system.
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Affiliation(s)
- Rui Liu
- Engineering Research Center of Modern Chinese Medicine Discovery and Preparation Technique, Ministry of Education, Tianjin 300193, PR China; Institute of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, PR China; Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin 300193, PR China
| | - Zhidong Liu
- Engineering Research Center of Modern Chinese Medicine Discovery and Preparation Technique, Ministry of Education, Tianjin 300193, PR China; Institute of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, PR China; Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin 300193, PR China.
| | - Chengui Zhang
- Engineering Center of Tianjin Zhongxin Pharmaceutical Group Corporation Ltd., Tianjin 300193, PR China
| | - Boli Zhang
- Institute of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, PR China; Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin 300193, PR China
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17
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Pan C, Liu F, Motto M. Identification of pharmaceutical impurities in formulated dosage forms. J Pharm Sci 2010; 100:1228-59. [PMID: 24081463 DOI: 10.1002/jps.22376] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2010] [Revised: 09/16/2010] [Accepted: 09/16/2010] [Indexed: 02/06/2023]
Abstract
Structure elucidation of pharmaceutical impurities is an important part of the drug product development process. Impurities can have unwanted pharmacological or toxicological effects that seriously impact product quality and patient safety. This review focuses on current analytical strategies for chemical and structural identification of pharmaceutical impurities. Potential sources and mechanisms of impurity formation are discussed for both drug substance and drug product applications. The utility of liquid chromatography-mass spectrometry (LC/MS) for providing structure-rich information is highlighted throughout this review. Other hyphenated analytical techniques including LC/nuclear magnetic resonance, gas chromatography/MS, and size-exclusion chromatography/chemiluminescent nitrogen detectors are also discussed, as LC/MS alone sometimes cannot reveal or confirm the final structures as required during dosage form development.
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Affiliation(s)
- Changkang Pan
- Pharmaceutical and Analytical Development, Novartis Pharmaceuticals Corporation, One Health Plaza, East Hanover, New Jersey 07936.
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18
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Brown SC, Claybourn M, Sievwright D, Fearnside V, Ashman C. Lean Raman imaging for rapid assessment of homogeneity in pharmaceutical formulations. APPLIED SPECTROSCOPY 2010; 64:442-447. [PMID: 20412630 DOI: 10.1366/000370210791114239] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Solid dispersion formulations and drug in polymer matrices are increasingly being used by the pharmaceutical industry to enhance the solubility, or bio-availability, of active pharmaceutical ingredients (APIs). The degree of solubility or bio-availability enhancement, as well as properties such as chemical stability and physical characteristics, will be dependent on the homogeneity of the drug in polymer matrix. The use of Raman spectroscopy to assess homogeneity has traditionally been limited by the time required to acquire images from a statistically representative sample area. This may be overcome by employing a more rapid one-dimensional Raman line-mapping approach and using a statistical analysis to extract the critical information. This approach has been termed "lean" Raman imaging and allows a large area of sample to be probed in a relatively short space of time. This paper discusses the use of "lean" Raman imaging to assess two performance-indicating parameters of a drug in polymer formulation, sedimentation of the API within a capsule formulation and phase separation of the individual components. The development of a screening method, using Raman line mapping to allow rapid measurement of sedimentation of the API, is discussed. This method requires less than half an hour per capsule for data collection and processing. In addition, the development of a "lean" Raman mapping technique, using single line scans to assess drug and polymer domain sizes, is detailed. This technique employs a simple peak ratio approach coupled with statistical analysis to provide a measure of the degree of drug and polymer segregation without the need for acquisition of high pixel density images or multivariate analysis. The Raman mapping data is compared with both the dissolution profiles and processing parameters of the samples tested and a strong correlation is shown between formulation homogeneity and dissolution behavior.
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Affiliation(s)
- Stephanie C Brown
- AstraZeneca, Analytical Development, UG13 Laboratory Block, Charter Way, Silk Road Business Park, Macclesfield, Cheshire SK102NA, United Kingdom, 01625231868.
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Yu P, Qin D, Qin G, Fan B, Ma G, Su Z. PEGylation of rhIL-1RA increased its solution stability at room temperature. Process Biochem 2009. [DOI: 10.1016/j.procbio.2009.07.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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20
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Tran TTD, Tran PHL, Lee BJ. Dissolution-modulating mechanism of alkalizers and polymers in a nanoemulsifying solid dispersion containing ionizable and poorly water-soluble drug. Eur J Pharm Biopharm 2009; 72:83-90. [DOI: 10.1016/j.ejpb.2008.12.009] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2008] [Revised: 08/05/2008] [Accepted: 12/15/2008] [Indexed: 11/25/2022]
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21
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Varshosaz J, Soheili M. Production and in vitro characterization of lisinopril-loaded nanoparticles for the treatment of restenosis in stented coronary arteries. J Microencapsul 2009; 25:478-86. [PMID: 19238723 DOI: 10.1080/02652040802054679] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Lisinopril, an angiotensin converting enzyme (ACE) inhibitor drug, was encapsulated in poly(lactide-co-glicolide) (PLGA) nanoparticles (NP) for site-specific delivery by catheters in prevention of restenosis. NP were prepared by emulsification-diffusion method. The PLGA type, stabilizing agent type and its concentration were studied as process variables. The z-average particle size varied between 265-412 nm. The highest zeta potential was seen in NP prepared with Pluronic F-68. None of the studied variables or their interactions had a significant effect on the particle size while all had main effect on the zeta potential. The highest entrapment efficiency was 93% and all studied variables and their interactions except PLGA type and its interaction with the stabilizer type had significant effects on the loading. Baker-Lonsdale model was the most appropriate model for release of lisinopril from NP. Five per cent PLGA 75:25 and 5% Pluronic F-68 showed promising results for 21 days release of lisinopril as an anti-restenotic agent.
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Affiliation(s)
- J Varshosaz
- Faculty of Pharmacy, Isfahan Pharmaceutical Sciences Research Center and Department of Pharmaceutics, Isfahan University of Medical Sciences, Isfahan, Iran.
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22
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Jin Y, Ai P, Xin R, Tian Y, Dong J, Chen D, Wang W. Self-assembled drug delivery systems: Part 3. In vitro/in vivo studies of the self-assembled nanoparticulates of cholesteryl acyl didanosine. Int J Pharm 2008; 368:207-14. [PMID: 19007871 DOI: 10.1016/j.ijpharm.2008.10.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2008] [Revised: 09/19/2008] [Accepted: 10/13/2008] [Indexed: 10/21/2022]
Abstract
Self-assembled drug delivery systems (SADDS) are defined as the self-assemblies of amphiphilic prodrugs, integrating prodrugs, molecular self-assembly and nanotechnology for drug targeting and controlled release. Cholesteryl-succinyl didanosine (CSD) and cholesteryl-adipoyl didanosine (CAD) nanoparticulate systems in water were previously prepared and optimized. In this paper, the in vitro and in vivo behavior of them was investigated. Precipitation occurred when they were mixed with acid solutions due to rapid production of hypoxanthine and subsequent disruption of supramolecular structures. They showed pH-dependent degradation and kept relatively stable in the neutral pH range. CSD is more stable than CAD due to the shorter spacer and poloxamer protection. CSD showed different degradation rates in various plasma with the descending order of rat, mouse, rabbit, dog and human. The half-life (t(1/2)) of CSD is 9 days in rat plasma, and 5.9 days in rat liver homogenates. CAD has a faster degradation than CSD though the t(1/2) in rat liver homogenates is long to 23 h. CSD nanoparticulates showed no significant anti-HIV effect in MT4 cell model because of very slow degradation. CSD nanoparticulates showed the distribution t(1/2) of 7.6 min after bolus intravenous (i.v.) administration to rats, and the site-specific distribution in liver, lung and spleen with the high t(1/2) of 10 days in liver. The factors affecting achievement of successful SADDS are discussed.
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Affiliation(s)
- Yiguang Jin
- Department of Pharmaceutical Chemistry, Beijing Institute of Radiation Medicine, Beijing 100850, PR China.
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Kim AR, Lim SJ, Lee BJ. Metabolic inhibition and kinetics of raloxifene by pharmaceutical excipients in human liver microsomes. Int J Pharm 2008; 368:37-44. [PMID: 18977285 DOI: 10.1016/j.ijpharm.2008.09.049] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2008] [Revised: 09/17/2008] [Accepted: 09/28/2008] [Indexed: 10/21/2022]
Abstract
This study was originally undertaken to establish the in vitro metabolic conditions and then evaluate the effect of pharmaceutical excipients (PEs) on drug metabolism in uridine diphosphoglucuronic acid-supplemented human liver microsomes. Poorly bioavailable raloxifene was chosen as a model drug. Intact drug and its two glucuronide metabolites were successfully isolated using gradient HPLC analysis and LC/MS analysis. Formation of raloxifene metabolites was affected by buffer compositions, incubation time and initial raloxifene concentrations. Under optimized metabolic conditions, 41.0% of raloxifene was converted to its metabolites after 2h incubation. This metabolic inhibition of raloxifene by the PEs occurred in a dose-dependent manner and accordingly formed two glucuronide metabolites. In the metabolic kinetics using Lineweaver-Burk analyses, Cremophor EL competitively inhibited formation of metabolites while sodium lauryl sulfate (SLS), polyvinylpyrrolidone K30 (PVP) and Tween 80 significantly inhibited in a mixed competition. Although some PEs showed inhibition on glucuronidation of raloxifene in vitro, their effects on in vivo bioavailability of raloxifene need to be confirmed directly due to the dilution factors and other complicated situations influencing the bioavailability.
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Affiliation(s)
- Ae Ra Kim
- National Research Laboratory for Bioavailability Control, College of Pharmacy, Kangwon National University, Chuncheon, Republic of Korea
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Gokce EH, Sandri G, Bonferoni MC, Rossi S, Ferrari F, Güneri T, Caramella C. Cyclosporine A loaded SLNs: evaluation of cellular uptake and corneal cytotoxicity. Int J Pharm 2008; 364:76-86. [PMID: 18725276 DOI: 10.1016/j.ijpharm.2008.07.028] [Citation(s) in RCA: 113] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2008] [Revised: 06/30/2008] [Accepted: 07/21/2008] [Indexed: 10/21/2022]
Abstract
Cyclosporine A (CsA) loaded solid lipid nanoparticles (SLNs) for topical ophthalmic applications were prepared by high shear homogenization and ultrasound method using Compritol 888 ATO, Poloxamer 188 and Tween 80, to investigate the cellular uptake of rabbit corneal epithelial cells (RCE) and to evaluate the cytotoxicity. The size of the optimized formulation was 225.9+/-5.5 nm with a polydispersity index of 0.253+/-0.05. The zeta potential and entrapment efficiency was detected as -16.9+/-0.7 mV and 95.6%, respectively. The CsA release was found to be enzyme (lipase/co-lipase complex) dependent. SLNs were sterilized at 110 and 121 degrees C. The cytotoxicity was evaluated in vitro by means of RCE cells and was higher at 121 degrees C sterilization temperature, probably due to a supposed leakage of Tween 80 following lipid re-crystallization. The permeation and penetration of CsA across/into the corneal cells were evaluated using in vitro and ex vivo experiments. The cellular uptake was investigated by replacing CsA with the fluorescent dye Rhodamine B. The penetration enhancement properties were supported by confocal laser scanning microscopy analysis. The internalization of SLNs in cornea and in RCE cell lines was confirmed, pointing out the possibility of CsA targeting to the cornea.
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Affiliation(s)
- Evren H Gokce
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Ege, Izmir 35100, Turkey.
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