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Ali ISM, Sajad UA, Abdul Rasool BK. Solid dispersion systems for enhanced dissolution of poorly water-soluble candesartan cilexetil: In vitro evaluation and simulated pharmacokinetics studies. PLoS One 2024; 19:e0303900. [PMID: 38843120 PMCID: PMC11156308 DOI: 10.1371/journal.pone.0303900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Accepted: 05/02/2024] [Indexed: 06/09/2024] Open
Abstract
BACKGROUND Candesartan cilexetil (CC) is a selective angiotensin II receptor antagonist widely used to treat hypertension. CC is a substrate of P-glycoprotein (P-gp), causing its efflux to the intestinal lumen. It is also practically insoluble in water and has low oral bioavailability (14%). Thus, the current study aims to improve the in vitro dissolution of CC by developing solid dispersion systems (SDSs) and corroborating the in vitro results using a simulated pharmacokinetics study. METHODS The SDSs were prepared using polyvinyl pyrrolidone (PVP) as a water-soluble polymer, Eudragit E100 (EE100) as a pH-dependent soluble carrier, and a combination of these two polymers. The saturation solubility and the dissolution rate studies of the prepared systems in three dissolution media were performed. The optimized system SE-EE5 was selected for further investigations, including DSC, XRD, FTIR, FESEM, DLS, TSEM, IVIVC convolution study, and stability studies. RESULTS The solubility of CC significantly increased by a factor of 27,037.344 when formulated as a solid dispersion matrix using EE100 at a ratio of 1:5 (w/w) drug to polymer (SE-EE5 SD), compared to the solubility of the pure drug. The mechanism of solubility and dissolution rate enhancement of CC by the optimized SDS was found to be via the conversion of the crystalline CC into the amorphous form as well as nanoparticles formation upon dissolution at a pH below 5. The instrumental analysis tests showed good compatibility between CC and EE100 and there was no chemical interaction between the drug and the polymer. Moreover, the stability tests confirmed that the optimized system was stable after three months of storage at 25°C. CONCLUSION The utilization of the solid dispersion technique employing EE 100 polymer as a matrix demonstrates significant success in enhancing the solubility, dissolution, and subsequently, the bioavailability of water-insoluble drugs like CC.
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Affiliation(s)
| | - Uday Aziz Sajad
- Pharmaceutics Department, College of Pharmacy, University of Basrah, Basrah, Iraq
- Pharmaceutics Department, College of Pharmacy, Almaaqal University, Basrah, Iraq
| | - Bazigha K. Abdul Rasool
- Department of Pharmaceutical Sciences, Dubai Pharmacy College for Girls, Dubai, United Arab Emirates
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Manchanda A, Bookwala M, Wildfong PLD, Bogner RH. Effect of Structurally Related Compounds on Desupersaturation Kinetics of Indomethacin. Pharm Res 2023; 40:2769-2778. [PMID: 37667146 DOI: 10.1007/s11095-023-03587-w] [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: 04/30/2023] [Accepted: 08/14/2023] [Indexed: 09/06/2023]
Abstract
PURPOSE The pharmaceutical literature contains examples wherein desupersaturation from high concentrations does not proceed to equilibrium concentration of the thermodynamically most stable form but remains above equilibrium. The purpose of the current research was to investigate the effect of structurally related compounds on desupersaturation kinetics as a possible explanation for a higher than equilibrium solubility after crystal growth of γ-indomethacin (γ-IMC). METHODS Three structurally related compounds (SRC) - cis-sulindac (c-SUL), trans-sulindac (t-SUL) and indomethacin-related compound-A (IMC-A) -were investigated. Desupersaturation kinetics to the most stable γ-IMC, in the presence of c-SUL, t-SUL or IMC-A, was measured at pH 2.0. RESULTS The SRCs c-SUL and t-SUL were effective crystallization inhibitors of IMC, while IMC-A was not a potent crystallization inhibitor of IMC. Among the sulindac isomers, t-SUL was a stronger crystallization inhibitor. The apparent solubility of γ-IMC crystals grown from supersaturated solutions in the presence of SRCs matched the equilibrium solubility of γ-IMC. During crystallization of IMC in the presence of IMC-A, the concentration of IMC-A declined initially but rebounded as supersaturation and crystallization rate of IMC declined, suggesting that IMC-A itself became incorporated in the IMC crystal lattice at higher degrees of IMC supersaturation. CONCLUSIONS The results suggest that high apparent solubility after crystallization of IMC reported by several authors is not related to the presence of IMC-A impurity. The greater IMC crystal growth rate inhibition by t-SUL than by c-SUL was consistent with the proposed orientation of SUL molecules adsorbed on the IMC crystal, providing a mechanistic understanding of the inhibition.
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Affiliation(s)
- Arushi Manchanda
- Department of Pharmaceutical Sciences, University of Connecticut, 69 North Eagleville Road, Unit 3092, Storrs, CT, 06269, USA
| | - Mustafa Bookwala
- Graduate School of Pharmaceutical Sciences, Duquesne University, Pittsburgh, PA, 15282, USA
| | - Peter L D Wildfong
- Graduate School of Pharmaceutical Sciences, Duquesne University, Pittsburgh, PA, 15282, USA
| | - Robin H Bogner
- Department of Pharmaceutical Sciences, University of Connecticut, 69 North Eagleville Road, Unit 3092, Storrs, CT, 06269, USA.
- Institute of Material Science, University of Connecticut, Storrs, CT, 06269, USA.
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Islam MS, Mitra S. Microwave Synthesis of Nanostructured Functionalized Polylactic Acid (nfPLA) for Incorporation Into a Drug Crystals to Enhance Their Dissolution. J Pharm Sci 2023; 112:2260-2266. [PMID: 36958690 DOI: 10.1016/j.xphs.2023.03.011] [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: 01/12/2023] [Revised: 03/15/2023] [Accepted: 03/15/2023] [Indexed: 03/25/2023]
Abstract
Active pharmaceutical ingredients that have low aqueous solubility pose a challenge in the field of drug delivery. In this paper we report for the first time the synthesis of nano-structured, hydrophilized polylactic acid (nfPLA) and its application in the delivery of low solubility drugs. Microwave induced acid oxidation was used to generate nfPLA where the oxygen concentration increased from 27.0 percent to 41.0 percent. Also, the original non dispersible PLA was converted to a relatively dispersible form with an average particle size of 131.4 nm and a zeta potential of -23.3 mV. Small quantities of the nfPLA were incorporated into the crystals (0.5 to 2.0 % by weight) of a highly hydrophobic, low solubility antifungal drug Griseofulvin (GF) to form a composite (GF-nfPLA). An antisolvent approach was used for the synthesis of the drug composite. SEM and Raman imaging showed non-uniform distribution of the nfPLA on the crystal surface. The solubility of GF increased from 8.89 µg/mL to as high as 49.67 µg/mL for the GF-nfPLA. At the same time zeta potential changed from -15.4 mV to -39.0 mV, therefore the latter was a relatively stable colloid. Octanol-water partitioning also showed a similar effect as logP reduced from 2.16 for pure GF to 0.55 for GF-nfPLA. In vitro dissolution testing showed six times higher aqueous solubility of GF-nfPLA compared to pure GF. The time for 50 (T50) and 80 % (T80) dissolution reduced significantly for the nfPLA composites; T50 reduced from 40.0 to 14.0 min and T80 reduced form unachievable to 47.0 min. Overall, the PLA which is an FDA approved, bioabsorbable polymer can be used to enhance the dissolution of hydrophobic pharmaceuticals and this can lead to higher efficacy and lower the required dosage for drugs.
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Affiliation(s)
- Mohammad Saiful Islam
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ, 07102, USA
| | - Somenath Mitra
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ, 07102, USA.
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Minhas MU, Khan KU, Sarfraz M, Badshah SF, Munir A, Barkat K, Basit A, Arafat M. Polyvinylpyrrolidone K-30-Based Crosslinked Fast Swelling Nanogels: An Impeccable Approach for Drug's Solubility Improvement. BIOMED RESEARCH INTERNATIONAL 2022; 2022:5883239. [PMID: 36060130 PMCID: PMC9439932 DOI: 10.1155/2022/5883239] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 07/31/2022] [Accepted: 08/06/2022] [Indexed: 11/17/2022]
Abstract
Poor solubility is a global issue of copious pharmaceutical industries as large number of drugs in development stage as well as already marketed products are poorly soluble which results in low dissolution and ultimately dosage increase. Current study is aimed at developing a polyvinylpyrrolidone- (PVP-K30-) based nanogel delivery system for solubility enhancement of poorly soluble drug olanzapine (OLP), as solubilization enhancement is the most noteworthy application of nanosystems. Crosslinking polymerization with subsequent condensation technique was used for the synthesis of nanogels, a highly responsive polymeric networks in drug's solubility. Developed nanogels were characterized by percent entrapment efficiency, sol-gel, percent swelling, percent drug loaded content (%DLC), percent porosity, stability, solubility, in vitro dissolution studies, FTIR, XRD, and SEM analysis. Furthermore, cytotoxicity study was conducted on rabbits to check the biocompatibility of the system. Particle size of nanogels was found with 178.99 ± 15.32 nm, and in vitro dissolution study exhibited that drug release properties were considerably enhanced as compared to the marketed formulation OLANZIA. The solubility studies indicated that solubility of OLP was noticeably improved up to 36.7-fold in phosphate buffer of pH 6.8. In vivo cytotoxicity study indicated that prepared PVP-K30-based formulation was biocompatible. On the basis of results obtained, the developed PVP-K30-co-poly (AMPS) nanogel delivery system is expected to be safe, effective, and cost-effective for solubility improvement of poorly soluble drugs.
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Affiliation(s)
| | | | - Muhammad Sarfraz
- College of Pharmacy, Al Ain University, Al Ain Campus, Al Ain, UAE
| | | | - Abubakar Munir
- Faculty of Pharmacy, Superior University Lahore, Punjab, Pakistan
| | - Kashif Barkat
- Faculty of Pharmacy, University of Lahore, Punjab, Pakistan
| | - Abdul Basit
- Quaid-e-Azam College of Pharmacy, Sahiwal, Punjab, Pakistan
| | - Mosab Arafat
- College of Pharmacy, Al Ain University, Al Ain Campus, Al Ain, UAE
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Everaerts M, Cools L, Adriaensens P, Reekmans G, Baatsen P, Van den Mooter G. Investigating the Potential of Ethyl Cellulose and a Porosity-Increasing Agent as a Carrier System for the Formulation of Amorphous Solid Dispersions. Mol Pharm 2022; 19:2712-2724. [PMID: 35476407 DOI: 10.1021/acs.molpharmaceut.1c00972] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
In the present work, an insoluble polymer, i.e., ethyl cellulose (EC), was combined with the water-soluble polyvinylpyrrolidone (PVP) as a carrier system for the formulation of amorphous solid dispersions. The rationale was that by conjoining these two different types of carriers a more gradual drug release could be created with less risk for precipitation. Our initial hypothesis was that upon contact with the dissolution medium, PVP would be released, creating a porous EC matrix through which the model drug indomethacin could diffuse. On the basis of observations of EC as a coating material, the effect of the molecular weight of PVP, and the ratio of EC/PVP on the miscibility of the polymer blend, the solid state of the solid dispersion and the drug release from these solid dispersions were investigated. X-ray powder diffraction, modulated differential scanning calorimetry, and solid-state nuclear magnetic resonance were used to unravel the miscibility and solid-state properties of these blends and solid dispersions. Solid-state nuclear magnetic resonance appeared to be a crucial technique for this aspect as modulated differential scanning calorimetry was not sufficient to grasp the complex phase behavior of these systems. Both EC/PVP K12 and EC/PVP K25 blends were miscible over the entire composition range, and addition of indomethacin did not alter this. Concerning the drug release, it was initially thought that more PVP would lead to faster drug release with a higher probability that all of the drug molecules would be able to diffuse out of the EC network as more pores would be created. However, this view on the release mechanism appeared to be too simplistic as an optimum was observed for both blends. On the basis of this work, it could be concluded that drug release from this complex ternary system was affected not only by the ratio of EC/PVP and the molecular weight of PVP but also by interactions between the three components, the wettability of the formulations, and the viscosity layer that was created around the particles.
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Affiliation(s)
- Melissa Everaerts
- Drug Delivery and Disposition, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Campus Gasthuisberg ON2, Herestraat 49 b921, 3000 Leuven, Belgium
| | - Lennert Cools
- Drug Delivery and Disposition, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Campus Gasthuisberg ON2, Herestraat 49 b921, 3000 Leuven, Belgium
| | - Peter Adriaensens
- Applied and Analytical Chemistry, Hasselt University, Institute for Materials Research, Campus Diepenbeek Agoralaan 1-Building D, 3590 Diepenbeek, Belgium
| | - Gunter Reekmans
- Applied and Analytical Chemistry, Hasselt University, Institute for Materials Research, Campus Diepenbeek Agoralaan 1-Building D, 3590 Diepenbeek, Belgium
| | - Pieter Baatsen
- Electron Microscopy Platform & Bio Imaging Core, VIB-KU Leuven Center for Brain & Disease Research, Department of Neurosciences, KU Leuven, Campus Gasthuisberg ON4, Herestraat 49 b602, 3000 Leuven, Belgium
| | - Guy Van den Mooter
- Drug Delivery and Disposition, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Campus Gasthuisberg ON2, Herestraat 49 b921, 3000 Leuven, Belgium
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Zhao P, Hu G, Chen H, Li M, Wang Y, Sun N, Wang L, Xu Y, Xia J, Tian B, Liu Y, He Z, Fu Q. Revealing the roles of polymers in supersaturation stabilization from the perspective of crystallization behaviors: A case of nimodipine. Int J Pharm 2022; 616:121538. [PMID: 35124119 DOI: 10.1016/j.ijpharm.2022.121538] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 01/20/2022] [Accepted: 01/29/2022] [Indexed: 10/19/2022]
Abstract
Formulating drugs into amorphous solid dispersions (ASDs) represents an attractive means to enhance the aqueous solubility of drugs. Furthermore, water-soluble polymers have proven highly advantageous for stabilizing supersaturated solutions of ASDs. However, the performance and mechanism of various polymers in stabilizing supersaturated drug solutions have not been well-studied. The aim of this study was to investigate the effects of different commercial polymers on the dissolution behaviors and supersaturation stabilization of the ASDs and to further explore the mechanism of polymer mediated supersaturation maintenance by studying the crystallization behaviors of the ASDs. In this study, nimodipine (NMD) was used as a model drug because of its poor water-solubility and fast crystallization rate in aqueous solution, and three polymers polyvinylpyrrolidone (PVP), vinylpyrrolidone-vinyl acetate copolymer (PVP VA), and polyvinyl caprolactam-polyvinyl acetate-polyethylene glycol graft co-polymer (Soluplus) was selected as the drug carriers to form the ASDs with NMD. Solid-state characterizations of the ASDs confirmed the amorphous state of the ASD systems. ASDPVP VA demonstrated superior supersaturation maintenance in dissolution experiments compared to the other two ASD systems. Among the polymers tested, PVP VA most efficiently maintained dissolution of NMD and prevented its crystallization from the supersaturated solution. The ability of PVP VA to most-effectively maintain supersaturation of the drug was manifested by inhibition of crystal nucleation rather than inhibition of crystal growth following nucleation. These results suggest that nucleation inhibition was instrumental in enabling the polymer-mediated supersaturation maintenance, at least with NMD.
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Affiliation(s)
- Peixu Zhao
- Wuya College of Innovation, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang 110016, China
| | - Guowei Hu
- Wuya College of Innovation, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang 110016, China
| | - Haonan Chen
- Wuya College of Innovation, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang 110016, China
| | - Mo Li
- Liaoning Institute for Drug Control, No. 7 Chongshan West Road, Shenyang 110016, China
| | - Yiting Wang
- School of Pharmacy, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang 110016, China
| | - Nan Sun
- School of Pharmacy, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang 110016, China
| | - Lulu Wang
- School of Pharmacy, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang 110016, China
| | - Yuan Xu
- School of Pharmacy, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang 110016, China
| | - Jialong Xia
- School of Pharmacy, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang 110016, China
| | - Baocheng Tian
- School of Pharmacy, Binzhou Medical University, No. 346, Guanhai Road, Yantai 264003, China
| | - Yanhua Liu
- School of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
| | - Zhonggui He
- Wuya College of Innovation, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang 110016, China
| | - Qiang Fu
- Wuya College of Innovation, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang 110016, China.
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dos Santos J, da Silva GS, Velho MC, Beck RCR. Eudragit ®: A Versatile Family of Polymers for Hot Melt Extrusion and 3D Printing Processes in Pharmaceutics. Pharmaceutics 2021; 13:1424. [PMID: 34575500 PMCID: PMC8471576 DOI: 10.3390/pharmaceutics13091424] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 09/02/2021] [Accepted: 09/05/2021] [Indexed: 12/11/2022] Open
Abstract
Eudragit® polymers are polymethacrylates highly used in pharmaceutics for the development of modified drug delivery systems. They are widely known due to their versatility with regards to chemical composition, solubility, and swelling properties. Moreover, Eudragit polymers are thermoplastic, and their use has been boosted in some production processes, such as hot melt extrusion (HME) and fused deposition modelling 3D printing, among other 3D printing techniques. Therefore, this review covers the studies using Eudragit polymers in the development of drug delivery systems produced by HME and 3D printing techniques over the last 10 years. Eudragit E has been the most used among them, mostly to formulate immediate release systems or as a taste-masker agent. On the other hand, Eudragit RS and Eudragit L100-55 have mainly been used to produce controlled and delayed release systems, respectively. The use of Eudragit polymers in these processes has frequently been devoted to producing solid dispersions and/or to prepare filaments to be 3D printed in different dosage forms. In this review, we highlight the countless possibilities offered by Eudragit polymers in HME and 3D printing, whether alone or in blends, discussing their prominence in the development of innovative modified drug release systems.
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Affiliation(s)
- Juliana dos Santos
- Programa de Pós-Graduação em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre 90610-900, Brazil; (J.d.S.); (M.C.V.)
| | - Guilherme Silveira da Silva
- Departamento de Produção e Controle de Medicamentos, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre 90610-900, Brazil;
| | - Maiara Callegaro Velho
- Programa de Pós-Graduação em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre 90610-900, Brazil; (J.d.S.); (M.C.V.)
| | - Ruy Carlos Ruver Beck
- Programa de Pós-Graduação em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre 90610-900, Brazil; (J.d.S.); (M.C.V.)
- Departamento de Produção e Controle de Medicamentos, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre 90610-900, Brazil;
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Kuskov AN, Luss AL, Gritskova IA, Shtilman MI, Motyakin MV, Levina II, Nechaeva AM, Sizova OY, Tsatsakis AM, Mezhuev YO. Kinetics and Mechanism of Synthesis of Carboxyl-Containing N-Vinyl-2-Pyrrolidone Telehelics for Pharmacological Use. Polymers (Basel) 2021; 13:polym13152569. [PMID: 34372172 PMCID: PMC8347008 DOI: 10.3390/polym13152569] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 07/25/2021] [Accepted: 07/28/2021] [Indexed: 12/11/2022] Open
Abstract
It was found that sulfanylethanoic and 3-sulfanylpropanoic acids are effective regulators of molecular weight with chain transfer constants of 0.441 and 0.317, respectively, and show an unexpected acceleration effect on the radical polymerization of N-vinyl-2-pyrrolidone, initiated by 2,2’-azobisisobutyronitrile. It was determined for the first time that the thiolate anions of mercapto acids form a high-temperature redox initiating system with 2,2’-azobisisobutyronitrile during the radical polymerization of N-vinyl-2-pyrrolidone in 1,4-dioxane. Considering the peculiarities of initiation, a kinetic model of the polymerization of N-vinyl-2-pyrrolidone is proposed, and it is shown that the theoretical orders of the reaction rate, with respect to the monomer, initiator, and chain transfer agent, are 1, 0.75, 0.25, and are close to their experimentally determined values. Carboxyl-containing techelics of N-vinyl-2-pyrrolidone were synthesized so that it can slow down the release of the anticancer drug, doxorubicin, from aqueous solutions, which can find its application in the pharmacological field.
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Affiliation(s)
- Andrey N. Kuskov
- Department of Biomaterials, Mendeleev University of Chemical Technology of Russia, 125047 Moscow, Russia; (A.L.L.); (M.I.S.); (A.M.N.); (O.Y.S.)
- Correspondence: (A.N.K.); (Y.O.M.)
| | - Anna L. Luss
- Department of Biomaterials, Mendeleev University of Chemical Technology of Russia, 125047 Moscow, Russia; (A.L.L.); (M.I.S.); (A.M.N.); (O.Y.S.)
| | - Inessa A. Gritskova
- Department of Chemistry and Technology of Macromolecular Compounds, MIREA—Russian Technological University (RTU MIREA), 119454 Moscow, Russia;
| | - Mikhail I. Shtilman
- Department of Biomaterials, Mendeleev University of Chemical Technology of Russia, 125047 Moscow, Russia; (A.L.L.); (M.I.S.); (A.M.N.); (O.Y.S.)
| | - Mikhail V. Motyakin
- Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 119334 Moscow, Russia; (M.V.M.); (I.I.L.)
- Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Irina I. Levina
- Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 119334 Moscow, Russia; (M.V.M.); (I.I.L.)
| | - Anna M. Nechaeva
- Department of Biomaterials, Mendeleev University of Chemical Technology of Russia, 125047 Moscow, Russia; (A.L.L.); (M.I.S.); (A.M.N.); (O.Y.S.)
| | - Oksana Yu. Sizova
- Department of Biomaterials, Mendeleev University of Chemical Technology of Russia, 125047 Moscow, Russia; (A.L.L.); (M.I.S.); (A.M.N.); (O.Y.S.)
| | - Aristidis M. Tsatsakis
- Center of Toxicology Science & Research, Division of Morphology, Medical School, Voutes Campus, University of Crete, 71003 Heraklion, Greece;
- Department of Analytical and Forensic Medical Toxicology, Sechenov University, 119991 Moscow, Russia
| | - Yaroslav O. Mezhuev
- Department of Biomaterials, Mendeleev University of Chemical Technology of Russia, 125047 Moscow, Russia; (A.L.L.); (M.I.S.); (A.M.N.); (O.Y.S.)
- Correspondence: (A.N.K.); (Y.O.M.)
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Khan KU, Akhtar N, Minhas MU. Poloxamer-407-Co-Poly (2-Acrylamido-2-Methylpropane Sulfonic Acid) Cross-linked Nanogels for Solubility Enhancement of Olanzapine: Synthesis, Characterization, and Toxicity Evaluation. AAPS PharmSciTech 2020; 21:141. [PMID: 32419084 DOI: 10.1208/s12249-020-01694-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 04/16/2020] [Indexed: 12/20/2022] Open
Abstract
Current study is focused to enhance the solubility of poorly soluble drug olanzapine (OLZ) by nanogels drug delivery system, as improved solubility is one of the most important applications of nanosystems. Poor solubility is a major issue, and 40% of marketed and about 75% of new active pharmaceutical ingredients are poorly water soluble which significantly affect the bioavailability and therapeutic effects of these drugs. In this study, nanogels, a promising system for solubility enhancement, were developed by free-radical polymerization technique. Different formulations were synthesized in which poloxamer-407 was cross-linked with 2-acrylamido-2-methylpropane sulfonic acid (AMPS) with the help of cross-linker methylene bisacrylamide (MBA). The chemically cross-linked nanogels were characterized by Fourier transform infrared spectroscopy (FT-IR), thermos gravimetric analysis (TGA), differential scanning calorimetry (DSC), X-ray diffraction (XRD), scanning electron microscopy (SEM), zeta size, swelling, sol-gel analysis, drug loading, solubility, and in vitro drug release studies. In order to determine the biocompatibility and cytotoxicity of nanogels to biological system, toxicity study on rabbits was also carried out. It was confirmed that the developed nanogels was thermally stable, safe, effective, and compatible to biological system, and the solubility of olanzapine (OLZ) was enhanced up to 38 folds as compared with reference product.
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Affiliation(s)
- Kifayat Ullah Khan
- Faculty of Pharmacy and Alternative Medicine, The Islamia University of Bahawalpur, Bahawalpur, Punjab, 63100, Pakistan
| | - Naveed Akhtar
- Faculty of Pharmacy and Alternative Medicine, The Islamia University of Bahawalpur, Bahawalpur, Punjab, 63100, Pakistan
| | - Muhammad Usman Minhas
- College of Pharmacy, University of Sargodha, University Road, Sargodha City, Punjab, Pakistan.
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