101
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Bode C, Kranz H, Siepmann F, Siepmann J. In-situ forming PLGA implants for intraocular dexamethasone delivery. Int J Pharm 2018; 548:337-348. [PMID: 29981408 DOI: 10.1016/j.ijpharm.2018.07.013] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 07/02/2018] [Accepted: 07/03/2018] [Indexed: 11/15/2022]
Abstract
Different types of in-situ forming implants based on poly(lactic-co-glycolic acid) (PLGA) and N-methyl-pyrrolidone (NMP) were prepared for controlled ocular delivery of dexamethasone. The impact of the volume of the release medium, initial drug content, polymer molecular weight and PLGA concentration on the resulting drug release kinetics were studied and explained based on a thorough physico-chemical characterization of the systems. This included for instance the monitoring of dynamic changes in the implants' wet and dry mass, morphology, PLGA polymer molecular weight, pH of the surrounding bulk fluid and water/NMP contents upon exposure to phosphate buffer pH 7.4. Importantly, the systems can be expected to be rather robust with respect to variations in the vitreous humor volumes encountered in vivo. Interestingly, limited drug solubility effects within the implants as well as in the surrounding aqueous medium play an important role for the control of drug release at a drug loading of only 7.5%. Furthermore, the polymer molecular weight and PLGA concentration in the liquid formulations are decisive for how the polymer precipitates during solvent exchange and for the swelling behavior of the systems. These features determine the resulting inner system structure and the conditions for mass transport. Consequently, they affect the degradation and drug release of the in-situ formed implants.
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Affiliation(s)
- C Bode
- Univ. Lille, Inserm, CHU Lille, U1008, 59000 Lille, France
| | - H Kranz
- Bayer AG, Muellerstraße 178, 13353 Berlin, Germany
| | - F Siepmann
- Univ. Lille, Inserm, CHU Lille, U1008, 59000 Lille, France
| | - J Siepmann
- Univ. Lille, Inserm, CHU Lille, U1008, 59000 Lille, France.
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102
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Grün NG, Holweg PL, Donohue N, Klestil T, Weinberg AM. Resorbable implants in pediatric fracture treatment. Innov Surg Sci 2018; 3:119-125. [PMID: 31579775 PMCID: PMC6604569 DOI: 10.1515/iss-2018-0006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 05/08/2018] [Indexed: 01/07/2023] Open
Abstract
Pediatric osteosynthesis has developed over the last 20 years, thereby reducing medical and economic burden, including long and expensive hospitalization. Currently, conventional and rigid alloying systems such as titanium are used for stabilization of bone fractures in children. In many cases, implants must be removed, as otherwise growth would be impeded. Biodegradable implant materials exhibit beneficial properties and would make a second removal surgery unnecessary. In the following article, we will give an overview of implant materials that are currently used in pediatric traumatology with a focus on Mg-based implants. Furthermore, we will discuss current scientific knowledge on resorbable implants, including results from pre-clinics and clinics.
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Affiliation(s)
- Nicole Gabriele Grün
- Department of Orthopedics and Traumatology, Medical University of Graz, Graz, Austria
| | - Patrick Lukas Holweg
- Department of Orthopedics and Traumatology, Medical University of Graz, Graz, Austria
| | - Nicholas Donohue
- Department of Orthopedics and Traumatology, Medical University of Graz, Graz, Austria
| | - Thomas Klestil
- LK Baden-Mödling-Hainburg, Department of Orthopedic Surgery and Traumatology, Waltersdorferstraße 75, A-2500 Baden, Austria
- Danube University Krems, Faculty of Health and Medicine, Department for Health Sciences and Biomedicine, Center for Medical Specialisations, Dr. Karl-Dorrek-Str. 30, A-3500 Krems, Austria
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103
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Thurein SM, Lertsuphotvanit N, Phaechamud T. Physicochemical properties of β-cyclodextrin solutions and precipitates prepared from injectable vehicles. Asian J Pharm Sci 2018; 13:438-449. [PMID: 32104418 PMCID: PMC7032148 DOI: 10.1016/j.ajps.2018.02.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 02/26/2018] [Indexed: 01/12/2023] Open
Abstract
β-Cyclodextrin (β-CyD) is cyclic oligosaccharide of a glucopyranose, containing a relatively hydrophobic central cavity and hydrophilic outer surface. However, the usefulness of β-CyD is limited owing to its low aqueous solubility whereas we found that its apparent high solubility was evident in some injectable solvents including 2-pyrrolidone (PYR), N-methyl pyrrolidone (NMP) and dimethyl sulfoxide (DMSO). Therefore, in the present study, the physicochemical properties of the 30–60% w/w β-CyD in PYR, NMP and DMSO were investigated such as viscosity, water resistant, matrix formation rate and syringeability. The higher the concentration of β-CyD resulted in the increased viscosity and the higher force and energy of syringeability. β-CyD in PYR gave the highest viscosity which contributed to the lowest syringeability while β-CyD in DMSO exhibited the highest syringeability. The β-CyD in DMSO and NMP exhibited the higher rate of matrix formation. β-CyD in PYR showed the highest water resistant for phase separation while β-CyD in NMP gave the faster de-mixing rate compared to that from PYR. The difference in physicochemical properties of β-CyD dried ppts studied by scanning electron microscope (SEM), differential scanning calorimetry (DSC), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR) and thermogravimetric analysis (TGA) revealed that there was partial complexation of β-CyD with respective solvents. Both solution and precipitate characteristic properties will be useful for using β-CyD in further investigation as matrix material dissolved in the injectable vehicles as the in situ forming gel for periodontitis treatment.
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Affiliation(s)
- Sai Myo Thurein
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Silpakorn University, Nakhon Pathom 73000, Thailand.,Department of Pharmacognosy, University of Pharmacy, Mandalay, Myanmar
| | - Nutdanai Lertsuphotvanit
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Silpakorn University, Nakhon Pathom 73000, Thailand
| | - Thawatchai Phaechamud
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Silpakorn University, Nakhon Pathom 73000, Thailand
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104
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Sun Y, Jensen H, Petersen NJ, Larsen SW, Østergaard J. Concomitant monitoring of implant formation and drug release of in situ forming poly (lactide-co-glycolide acid) implants in a hydrogel matrix mimicking the subcutis using UV–vis imaging. J Pharm Biomed Anal 2018; 150:95-106. [DOI: 10.1016/j.jpba.2017.11.065] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Revised: 11/26/2017] [Accepted: 11/28/2017] [Indexed: 11/28/2022]
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105
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Bouressam ML, Meyer B, Boudier A, Clarot I, Leroy P, Genoni A, Ruiz-Lopez M, Giummelly P, Liminana P, Salgues V, Kouach M, Perrin-Sarrado C, Lartaud I, Dupuis F. In vivo and in silico evaluation of a new nitric oxide donor, S,S′ -dinitrosobucillamine. Nitric Oxide 2017; 71:32-43. [DOI: 10.1016/j.niox.2017.10.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2017] [Revised: 09/12/2017] [Accepted: 10/12/2017] [Indexed: 12/15/2022]
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106
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Sun Y, Jensen H, Petersen NJ, Larsen SW, Østergaard J. Phase separation of in situ forming poly (lactide-co-glycolide acid) implants investigated using a hydrogel-based subcutaneous tissue surrogate and UV–vis imaging. J Pharm Biomed Anal 2017; 145:682-691. [DOI: 10.1016/j.jpba.2017.07.056] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Revised: 07/30/2017] [Accepted: 07/31/2017] [Indexed: 12/12/2022]
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107
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In vitro dissolution testing of parenteral aqueous solutions and oily suspensions of paracetamol and prednisolone. Int J Pharm 2017; 532:519-527. [DOI: 10.1016/j.ijpharm.2017.09.052] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 08/24/2017] [Accepted: 09/18/2017] [Indexed: 12/31/2022]
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108
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Janagam DR, Ananthula S, Chaudhry K, Wu L, Mandrell TD, Johnson JR, Lowe TL. Injectable In Situ Forming Depot Systems for Long-Acting Contraception. ACTA ACUST UNITED AC 2017; 1:e1700097. [PMID: 32646191 DOI: 10.1002/adbi.201700097] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2017] [Revised: 07/12/2017] [Indexed: 01/03/2023]
Abstract
Up to date, no long-acting reversible contraceptive (LARC) is developed to be injectable through needles smaller than 18 G and can also provide contraception for more than 3 months after single injection. In this study, injectable polymeric in situ forming depot (ISD) systems are developed to have injectability through 21-23 G needles, and capability of sustained release of levonorgestrel (LNG) for at least 7 months in vitro and in vivo after single subcutaneous injection in rats. The systems are polymeric solutions composed of biodegradable poly(lactide-co-glycolide) and poly(lactic acid) polymers dissolved in a mixture of solvents like N-methyl-2-pyrrolidone and benzyl benzoate or triethyl citrate. LNG released from ISD systems successfully suppressed the estrous cycle of rats at plasma concentration above 0.35 ng mL-1 . At the end of the treatment, when LNG plasma concentration drops down to be nondetectable, predictable return of fertility is observed in rats. The designed ISD systems have great potential to be further developed into robust injectable LARCs that can be injected through a 21 G or smaller needle and achieve a variety of contraception durations with high patient compliance and low cost.
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Affiliation(s)
- Dileep R Janagam
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Suryatheja Ananthula
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Kamaljit Chaudhry
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Linfeng Wu
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Timothy D Mandrell
- Department of Comparative Medicine, University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - James R Johnson
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Tao L Lowe
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, Memphis, TN, 38163, USA
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109
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Hernandez C, Exner AA. Predicting in vivo behavior of injectable, in situ-forming drug-delivery systems. Ther Deliv 2017; 8:479-483. [PMID: 28350230 PMCID: PMC10072068 DOI: 10.4155/tde-2017-0007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Affiliation(s)
- Christopher Hernandez
- Department of Radiology, Case Western Reserve University, 10900 Euclid Ave, Cleveland, OH 44106, USA
| | - Agata A Exner
- Department of Radiology, Case Western Reserve University, 10900 Euclid Ave, Cleveland, OH 44106, USA
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110
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Sun X, Xu C, Wu G, Ye Q, Wang C. Poly(Lactic-co-Glycolic Acid): Applications and Future Prospects for Periodontal Tissue Regeneration. Polymers (Basel) 2017; 9:E189. [PMID: 30970881 PMCID: PMC6432161 DOI: 10.3390/polym9060189] [Citation(s) in RCA: 95] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 05/08/2017] [Accepted: 05/11/2017] [Indexed: 12/28/2022] Open
Abstract
Periodontal tissue regeneration is the ultimate goal of the treatment for periodontitis-affected teeth. The success of regenerative modalities relies heavily on the utilization of appropriate biomaterials with specific properties. Poly (lactic-co-glycolic acid) (PLGA), a synthetic aliphatic polyester, has been actively investigated for periodontal therapy due to its favorable mechanical properties, tunable degradation rates, and high biocompatibility. Despite the attractive characteristics, certain constraints associated with PLGA, in terms of its hydrophobicity and limited bioactivity, have led to the introduction of modification strategies that aimed to improve the biological performance of the polymer. Here, we summarize the features of the polymer and update views on progress of its applications as barrier membranes, bone grafts, and drug delivery carriers, which indicate that PLGA can be a good candidate material in the field of periodontal regenerative medicine.
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Affiliation(s)
- Xiaoyu Sun
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, 237 Luoyu Road, Wuhan 430079, China.
- Department of Oral Implantology and Prosthetic Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam 1081 HV, The Netherlands.
| | - Chun Xu
- Laboratory of Regenerative Dentistry, School of Dentistry, The University of Queensland, Brisbane 4006, Australia.
| | - Gang Wu
- Department of Oral Implantology and Prosthetic Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam 1081 HV, The Netherlands.
| | - Qingsong Ye
- Laboratory of Regenerative Dentistry, School of Dentistry, The University of Queensland, Brisbane 4006, Australia.
| | - Changning Wang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, 237 Luoyu Road, Wuhan 430079, China.
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111
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Zhu Y, Wang Z, Zhou H, Li L, Zhu Q, Zhang P. An injectable hydroxyapatite/poly(lactide-co-glycolide) composite reinforced by micro/nano-hybrid poly(glycolide) fibers for bone repair. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 80:326-334. [PMID: 28866171 DOI: 10.1016/j.msec.2017.04.121] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2017] [Revised: 04/11/2017] [Accepted: 04/13/2017] [Indexed: 01/26/2023]
Abstract
Porous nanocomposite of hydroxyapatite/poly(lactide-co-glycolide) (HA/PLGA) is conventionally used in bone tissue engineering but seldom in load-bearing orthopedic applications due to poor mechanical property. This study aimed to fabricate an injectable ternary composite by incorporating different contents of poly(glycolide) (PGA) fibers (0, 30, 50 and 70wt%) into the nanocomposite HA/PLGA matrix as reinforcing fillers for bone tissue repair. The fibers were obtained from melt-spinning and fiber diameter ranged from 70nm to 191μm. The injectability, mechanical strength, solidification rate and cytotoxicity of injectable composites were characterized. All composites achieved the acceptable injectability under an injection force of 100N. The mechanical properties of composites were gradually enhanced by increasing PGA fiber contents. The compression strength of composite with 70wt% content of PGA fibers was up to 31.1MPa, which was four times stronger than that of composite without PGA fibers. In the solidification rate analysis, the compression strength of composites with 50 or 70wt% PGA fibers in immersion time of only 45min was similar to that of composite without fibers in immersion time of 4-5h. The MTT test showed that exceeding 70% cells could survive in the fourfold dilution of extract, and its cytotoxicity focused on the first 4h after immersing. This study have revealed that the PGA fiber-reinforced HA/PLGA composite is a promising candidate for orthopedic applications.
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Affiliation(s)
- Yuhang Zhu
- Department of Orthopedics, China-Japan Union Hospital, Jilin University, 126 Xiantai Street, Changchun 130033, PR China; Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, PR China
| | - Zongliang Wang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, PR China
| | - Hongli Zhou
- Department of Orthopedics, China-Japan Union Hospital, Jilin University, 126 Xiantai Street, Changchun 130033, PR China; Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, PR China
| | - Linlong Li
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, PR China.; University of Science and Technology of China, 96 Jinzhai Road, Hefei 230026, PR China
| | - Qingsan Zhu
- Department of Orthopedics, China-Japan Union Hospital, Jilin University, 126 Xiantai Street, Changchun 130033, PR China.
| | - Peibiao Zhang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, PR China..
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112
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Parent M, Clarot I, Gibot S, Derive M, Maincent P, Leroy P, Boudier A. One-week in vivo sustained release of a peptide formulated into in situ forming implants. Int J Pharm 2017; 521:357-360. [DOI: 10.1016/j.ijpharm.2017.02.046] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 02/02/2017] [Accepted: 02/17/2017] [Indexed: 11/29/2022]
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113
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Cholesterol in situ forming gel loaded with doxycycline hyclate for intra-periodontal pocket delivery. Eur J Pharm Sci 2017; 99:258-265. [DOI: 10.1016/j.ejps.2016.12.023] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 11/09/2016] [Accepted: 12/21/2016] [Indexed: 01/29/2023]
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114
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Solvent removal precipitation based in situ forming implant for controlled drug delivery in periodontitis. J Control Release 2017; 251:75-81. [PMID: 28242417 DOI: 10.1016/j.jconrel.2017.02.022] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 01/24/2017] [Accepted: 02/19/2017] [Indexed: 01/22/2023]
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115
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Enayati M, Mobedi H, Hojjati-Emami S, Mirzadeh H, Jafari-Nodoushan M. In situ
forming PLGA implant for 90 days controlled release of leuprolide acetate for treatment of prostate cancer. POLYM ADVAN TECHNOL 2017. [DOI: 10.1002/pat.3991] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Marjan Enayati
- Department of Biomedical Research; Medical University of Vienna; Vienna Austria
- Department of Biomedical Engineering; Tehran Polytechnique University; 424, Hafez Ave., 15875-4413 Tehran Iran
| | - Hamid Mobedi
- Novel Drug Delivery Systems Department; Iran Polymer and Petrochemical Institute; P.O. Box 14965-115 Tehran Iran
| | - Shahriar Hojjati-Emami
- Department of Biomedical Engineering; Tehran Polytechnique University; 424, Hafez Ave., 15875-4413 Tehran Iran
| | - Hamid Mirzadeh
- Department of Biomedical Engineering; Tehran Polytechnique University; 424, Hafez Ave., 15875-4413 Tehran Iran
| | - Milad Jafari-Nodoushan
- Novel Drug Delivery Systems Department; Iran Polymer and Petrochemical Institute; P.O. Box 14965-115 Tehran Iran
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116
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Zhu Y, Wang Z, Li L, Gao D, Xu Q, Zhu Q, Zhang P. In vitro degradation behavior of a hydroxyapatite/poly(lactide-co-glycolide) composite reinforced by micro/nano-hybrid poly(glycolide) fibers for bone repair. J Mater Chem B 2017; 5:8695-8706. [DOI: 10.1039/c7tb02364b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A poly(glycolide) (PGA) fiber-reinforced hydroxyapatite/poly(lactide-co-glycolide) (HA/PLGA) composite with high mechanical strength has been prepared previously.
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Affiliation(s)
- Yuhang Zhu
- Key Laboratory of Polymer Ecomaterials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
| | - Zongliang Wang
- Key Laboratory of Polymer Ecomaterials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
| | - Linlong Li
- Key Laboratory of Polymer Ecomaterials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
| | - Daqian Gao
- Key Laboratory of Polymer Ecomaterials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
| | - Qinli Xu
- Key Laboratory of Polymer Ecomaterials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
| | - Qingsan Zhu
- Department of Orthopedics
- China-Japan Union Hospital
- Jilin University
- Changchun 130033
- P. R. China
| | - Peibiao Zhang
- Key Laboratory of Polymer Ecomaterials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
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117
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Wang L, Lin X, Hong Y, Shen L, Feng Y. Hydrophobic mixed solvent induced PLGA-based in situ forming systems for smooth long-lasting delivery of Radix Ophiopogonis polysaccharide in rats. RSC Adv 2017. [DOI: 10.1039/c6ra27676h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
To obtain a sustained in vivo release of Radix Ophiopogonis polysaccharide, hydrophobic solvent-induced in situ forming systems were investigated, including the factors affecting drug release and anti-myocardial ischemic activity of a formulation.
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Affiliation(s)
- LiNa Wang
- College of Chinese Materia Medica
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- China
- Engineering Research Center of Modern Preparation Technology of TCM of Ministry of Education
| | - Xiao Lin
- College of Chinese Materia Medica
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- China
| | - YanLong Hong
- Engineering Research Center of Modern Preparation Technology of TCM of Ministry of Education
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- China
| | - Lan Shen
- College of Chinese Materia Medica
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- China
| | - Yi Feng
- Engineering Research Center of Modern Preparation Technology of TCM of Ministry of Education
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- China
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118
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Janagam DR, Wang L, Ananthula S, Johnson JR, Lowe TL. An Accelerated Release Study to Evaluate Long-Acting Contraceptive Levonorgestrel-Containing in Situ Forming Depot Systems. Pharmaceutics 2016; 8:E28. [PMID: 27598191 PMCID: PMC5039447 DOI: 10.3390/pharmaceutics8030028] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 08/19/2016] [Accepted: 08/23/2016] [Indexed: 12/02/2022] Open
Abstract
Biodegradable polymer-based injectable in situ forming depot (ISD) systems that solidify in the body to form a solid or semisolid reservoir are becoming increasingly attractive as an injectable dosage form for sustained (months to years) parenteral drug delivery. Evaluation of long-term drug release from the ISD systems during the formulation development is laborious and costly. An accelerated release method that can effectively correlate the months to years of long-term release in a short time such as days or weeks is economically needed. However, no such accelerated ISD system release method has been reported in the literature to date. The objective of the current study was to develop a short-term accelerated in vitro release method for contraceptive levonorgestrel (LNG)-containing ISD systems to screen formulations for more than 3-month contraception after a single subcutaneous injection. The LNG-containing ISD formulations were prepared by using biodegradable poly(lactide-co-glycolide) and polylactic acid polymer and solvent mixtures containing N-methyl-2-pyrrolidone and benzyl benzoate or triethyl citrate. Drug release studies were performed under real-time (long-term) conditions (PBS, pH 7.4, 37 °C) and four accelerated (short-term) conditions: (A) PBS, pH 7.4, 50 °C; (B) 25% ethanol in PBS, pH 7.4, 50 °C; (C) 25% ethanol in PBS, 2% Tween 20, pH 7.4, 50 °C; and (D) 25% ethanol in PBS, 2% Tween 20, pH 9, 50 °C. The LNG release profile, including the release mechanism under the accelerated condition D within two weeks, correlated (r² ≥ 0.98) well with that under real-time conditions at four months.
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Affiliation(s)
- Dileep R Janagam
- Department of Pharmaceutical Sciences, University of Tennessee Health Sciences Center, Memphis, TN 38163, USA.
| | - Lizhu Wang
- Department of Pharmaceutical Sciences, University of Tennessee Health Sciences Center, Memphis, TN 38163, USA.
| | - Suryatheja Ananthula
- Department of Pharmaceutical Sciences, University of Tennessee Health Sciences Center, Memphis, TN 38163, USA.
| | - James R Johnson
- Department of Pharmaceutical Sciences, University of Tennessee Health Sciences Center, Memphis, TN 38163, USA.
| | - Tao L Lowe
- Department of Pharmaceutical Sciences, University of Tennessee Health Sciences Center, Memphis, TN 38163, USA.
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119
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Phaechamud T, Chanyaboonsub N, Setthajindalert O. Doxycycline hyclate-loaded bleached shellac in situ forming microparticle for intraperiodontal pocket local delivery. Eur J Pharm Sci 2016; 93:360-70. [PMID: 27552903 DOI: 10.1016/j.ejps.2016.08.034] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Revised: 08/18/2016] [Accepted: 08/18/2016] [Indexed: 12/23/2022]
Abstract
Bleached shellac (BS) is a water-insoluble polyester resin made up of sesquiterpenoid acids esterified with hydroxy aliphatic acids. In this study, BS dissolved in N-methyl pyrrolidone (NMP), dimethyl sulfoxide (DMSO) and 2-pyrrolidone was used as the internal phase of oil in oil emulsion using olive oil emulsified with glyceryl monostearate (GMS) as the external phase of in situ forming microparticles (ISM). Doxycycline hyclate (DH)-loaded BS ISMs were tested for emulsion stability, viscosity, rheology, transformation into microparticles, syringeability, drug release, surface topography, in vitro degradation and antimicrobial activities against Staphylococcus aureus, Streptococcus mutans and Porphyromonas gingivalis. All emulsions exhibited pseudoplastic flow and notably low syringeability force. Slower transformation from emulsion into microparticles of ISM prepared with 2-pyrrolidone was owing to slower solvent exchange of this solvent which promoted less porous structure of obtained BS matrix microparticles. The system containing 2-pyrrolidone exhibited a higher degradability than that prepared with DMSO. Developed DH-loaded BS ISMs exhibited a sustainable drug release for 47days with Fickian diffusion and effectively inhibited P. gingivalis, S. mutans and S. aureus. Therefore a DH-loaded BS ISM using olive oil containing GMS as the external phase and 2-pyrrolidone as a solvent was a suitable formulation for periodontitis treatment.
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Affiliation(s)
- Thawatchai Phaechamud
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Silpakorn University, Nakhon Pathom 73000, Thailand.
| | - Nuttapong Chanyaboonsub
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Silpakorn University, Nakhon Pathom 73000, Thailand.
| | - Orn Setthajindalert
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Silpakorn University, Nakhon Pathom 73000, Thailand.
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Rahimi M, Mobedi H, Behnamghader A. In situ-forming PLGA implants loaded with leuprolide acetate/β-cyclodextrin complexes: mathematical modelling and degradation. J Microencapsul 2016; 33:355-64. [DOI: 10.1080/02652048.2016.1194905] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Long D, Gong T, Zhang Z, Ding R, Fu Y. Preparation and evaluation of a phospholipid-based injectable gel for the long term delivery of leuprolide acetaterrh. Acta Pharm Sin B 2016; 6:329-35. [PMID: 27471673 PMCID: PMC4951586 DOI: 10.1016/j.apsb.2016.05.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 04/03/2016] [Accepted: 04/15/2016] [Indexed: 11/24/2022] Open
Abstract
A phospholipid-based injectable gel was developed for the sustained delivery of leuprolide acetate (LA). The gel system was prepared using biocompatible materials (SPME), including soya phosphatidyl choline (SPC), medium chain triglyceride (MCT) and ethanol. The system displayed a sol state with low viscosity in vitro and underwent in situ gelation in vivo after subcutaneous injection. An in vitro release study was performed using a dialysis setup with different release media containing different percentages of ethanol. The stability of LA in the SPME system was investigated under different temperatures and in the presence of various antioxidants. In vivo studies in male rats were performed to elucidate the pharmacokinetic profiles and pharmacodynamic efficacy. A sustained release of LA for 28 days was observed without obvious initial burst in vivo. The pharmacodynamic study showed that once-a-month injection of LA-loaded SPME (SPME-LA) led to comparable suppression effects on the serum testosterone level as observed in LA solution except for the onset time. These findings demonstrate excellent potential for this novel SPME system as a sustained release delivery system for LA.
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Darestani-Farahani M, Vasheghani-Farahani E, Mobedi H, Ganji F. The effect of solvent composition on vancomycin hydrochloride and free base vancomycin release fromin situforming implants. POLYM ADVAN TECHNOL 2016. [DOI: 10.1002/pat.3845] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- M. Darestani-Farahani
- Faculty of Chemical Engineering; Tarbiat Modares University; P.O. Box 14115-143 Tehran Iran
| | - E. Vasheghani-Farahani
- Faculty of Chemical Engineering; Tarbiat Modares University; P.O. Box 14115-143 Tehran Iran
| | - H. Mobedi
- Novel Drug Delivery Systems Department; Polymer and Petrochemical Institute; P.O. Box 14965-115 Tehran Iran
| | - F. Ganji
- Faculty of Chemical Engineering; Tarbiat Modares University; P.O. Box 14115-143 Tehran Iran
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Poly(lactide-co-glycolide)/Hydroxyapatite Porous Scaffold with Microchannels for Bone Regeneration. Polymers (Basel) 2016; 8:polym8060218. [PMID: 30979320 PMCID: PMC6432299 DOI: 10.3390/polym8060218] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Revised: 05/06/2016] [Accepted: 05/30/2016] [Indexed: 02/06/2023] Open
Abstract
Mass transfer restrictions of scaffolds are currently hindering the development of three-dimensional (3D), clinically viable, and tissue-engineered constructs. For this situation, a 3D poly(lactide-co-glycolide)/hydroxyapatite porous scaffold, which was very favorable for the transfer of nutrients to and waste products from the cells in the pores, was developed in this study. The 3D scaffold had an innovative structure, including macropores with diameters of 300–450 μm for cell ingrowth and microchannels with diameters of 2–4 μm for nutrition and waste exchange. The mechanical strength in wet state was strong enough to offer structural support. The typical structure was more beneficial for the attachment, proliferation, and differentiation of rabbit bone marrow mesenchymal stem cells (rBMSCs). The alkaline phosphatase (ALP) activity and calcium (Ca) deposition were evaluated on the differentiation of rBMSCs, and the results indicated that the microchannel structure was very favorable for differentiating rBMSCs into maturing osteoblasts. For repairing rabbit radius defects in vivo, there was rapid healing in the defects treated with the 3D porous scaffold with microchannels, where the bridging by a large bony callus was observed at 12 weeks post-surgery. Based on the results, the 3D porous scaffold with microchannels was a promising candidate for bone defect repair.
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Xu Y, Kim CS, Saylor DM, Koo D. Polymer degradation and drug delivery in PLGA-based drug-polymer applications: A review of experiments and theories. J Biomed Mater Res B Appl Biomater 2016; 105:1692-1716. [PMID: 27098357 DOI: 10.1002/jbm.b.33648] [Citation(s) in RCA: 223] [Impact Index Per Article: 27.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 01/25/2016] [Accepted: 02/12/2016] [Indexed: 01/03/2023]
Abstract
Poly (lactic-co-glycolic acid) (PLGA) copolymers have been broadly used in controlled drug release applications. Because these polymers are biodegradable, they provide an attractive option for drug delivery vehicles. There are a variety of material, processing, and physiological factors that impact the degradation rates of PLGA polymers and concurrent drug release kinetics. This work is intended to provide a comprehensive and collective review of the physicochemical and physiological factors that dictate the degradation behavior of PLGA polymers and drug release from contemporary PLGA-based drug-polymer products. In conjunction with the existing experimental results, analytical and numerical theories developed to predict drug release from PLGA-based polymers are summarized and correlated with the experimental observations. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 1692-1716, 2017.
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Affiliation(s)
- Yihan Xu
- Materials Science and Engineering Department, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin, 53211
| | - Chang-Soo Kim
- Materials Science and Engineering Department, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin, 53211
| | - David M Saylor
- Division of Biology, Chemistry, and Materials Science, Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Maryland, 20993
| | - Donghun Koo
- Materials Science R&D, MilliporeSigma, Milwaukee, Wisconsin, 53209
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Hruby M, Agrawal K, Policianova O, Brus J, Skopal J, Svec P, Otmar M, Dzubak P, Stepanek P, Hajduch M. Biodegradable system for drug delivery of hydrolytically labile azanucleoside drugs. Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub 2016; 160:222-30. [PMID: 27003313 DOI: 10.5507/bp.2016.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 03/03/2016] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND The archetypal DNA methyltransferase inhibitors, 5-azacytidine (AZA) and 5-aza-2'-deoxycytidine (DAC) are potent antineoplastic agents used in the treatment of mainly, blood malignancies. However, the administration of these drugs is confounded by their hydrolytic lability which decreases plasma circulation time. Here, we describe a new biodegradable, polyanhydride formulation for drug delivery that circumvents this drawback. METHODS Injectable/implantable polymeric microbeads containing dispersed microcrystals of hydrophilic AZA or DAC packed in a dry environment are protected from hydrolysis, until the hydrolytic zone reaches the core. Diclofenac is embedded into the formulation to decrease any local inflammation. The efficacy of the formulations was confirmed by monitoring the induced demethylation, and cytostatic/cytotoxic effects of continuous drug release from the time-course dissolution of the microbeads, using an in vitro developed cell based reporter system. RESULTS Poly(sebaccic acid-co-1,4-cyclohexanedicarboxylic acid) containing 30 wt. % drug showed zero-order release (R(2) = 0.984 for linear regression), and release rate of 10.0 %/h within the first 5 h, and subsequent slower release of the remaining drug, thus maintaining the level of drugs in the outer environment considerably longer than the typical plasma half-life of free azanucleosides. At lower concentrations, the differences between powder drug formulations and microbeads were very low or negligible, however, at higher concentrations, we discovered equivalent or increasing effects of the drugs loaded in microbeads. CONCLUSIONS The study provides evidence that microbead formulations of the hydrolytically labile azanucleoside drugs could prevent their chemical decomposition in aqueous solution, and effectively increase plasma circulation time.
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Affiliation(s)
- Martin Hruby
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic
| | - Khushboo Agrawal
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacky University Olomouc, Hnevotinska 5, 779 00 Olomouc, Czech Republic
| | - Olivia Policianova
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic
| | - Jiri Brus
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic
| | - Jan Skopal
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic
| | - Pavel Svec
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic
| | - Miroslav Otmar
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, v.v.i., Fleming Sq. 2.166 10 Prague 6, Czech Republic
| | - Petr Dzubak
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacky University Olomouc, Hnevotinska 5, 779 00 Olomouc, Czech Republic
| | - Petr Stepanek
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic
| | - Marian Hajduch
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacky University Olomouc, Hnevotinska 5, 779 00 Olomouc, Czech Republic
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Ahmed OAA, Zidan AS, Khayat M. Mechanistic analysis of Zein nanoparticles/PLGA triblock in situ forming implants for glimepiride. Int J Nanomedicine 2016; 11:543-55. [PMID: 26893561 PMCID: PMC4745829 DOI: 10.2147/ijn.s99731] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Objectives The study aims at applying pharmaceutical nanotechnology and D-optimal fractional factorial design to screen and optimize the high-risk variables affecting the performance of a complex drug delivery system consisting of glimepiride–Zein nanoparticles and inclusion of the optimized formula with thermoresponsive triblock copolymers in in situ gel. Methods Sixteen nanoparticle formulations were prepared by liquid–liquid phase separation method according to the D-optimal fractional factorial design encompassing five variables at two levels. The responses investigated were glimepiride entrapment capacity (EC), particle size and size distribution, zeta potential, and in vitro drug release from the prepared nanoparticles. Furthermore, the feasibility of embedding the optimized Zein-based glimepiride nanoparticles within thermoresponsive triblock copolymers poly(lactide-co-glycolide)-block-poly(ethylene glycol)-block-poly(lactide-co-glycolide) in in situ gel was evaluated for controlling glimepiride release rate. Results Through the systematic optimization phase, improvement of glimepiride EC of 33.6%, nanoparticle size of 120.9 nm with a skewness value of 0.2, zeta potential of 11.1 mV, and sustained release features of 3.3% and 17.3% drug released after 2 and 24 hours, respectively, were obtained. These desirability functions were obtained at Zein and glimepiride loadings of 50 and 75 mg, respectively, utilizing didodecyldimethylammonium bromide as a stabilizer at 0.1% and 90% ethanol as a common solvent. Moreover, incorporating this optimized formulation in triblock copolymers-based in situ gel demonstrated pseudoplastic behavior with reduction of drug release rate as the concentration of polymer increased. Conclusion This approach to control the release of glimepiride using Zein nanoparticles/triblock copolymers-based in situ gel forming intramuscular implants could be useful for improving diabetes treatment effectiveness.
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Affiliation(s)
- Osama Abdelhakim Aly Ahmed
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia; Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Minia University, Minia, Egypt
| | - Ahmed Samir Zidan
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia; Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Maan Khayat
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
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Dong H, Tang G, Ma T, Cao X. One-step fabrication of inorganic/organic hybrid microspheres with tunable surface texture for controlled drug release application. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2016; 27:7. [PMID: 26610930 DOI: 10.1007/s10856-015-5624-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2015] [Accepted: 11/09/2015] [Indexed: 06/05/2023]
Abstract
In this paper, we report one-step fabrication of poly(lactide-co-glycolic acid)/titanium oxide (PLGA/TiO2) hybrid microspheres with tunable surface texture via droplet-based microfluidics. Surface texture of microspheres can be continuously tuned by changing the mass ratio between titanium tetraisopropoxide (TTIP) and PLGA in the dispersed phase. The fast hydrolysis of TTIP on the droplet surface can generate a thin shell membrane, resulting in a wrinkled surface after extraction of organic solvent. In vitro drug release monitoring of tanshinone IIA-loaded PLGA/TiO2 hybrid microsphere reveals that surface texture can affect the drug release rate to a large extent without sacrificing the drug encapsulation efficiency. Our finding might benefit the sustained drug delivery where variable drug release rate and high drug encapsulation efficiency are both required.
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Affiliation(s)
- Hua Dong
- Department of Biomedical Engineering, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China.
- Guangdong Province Key Laboratory of Biomedical Engineering, South China University of Technology, Guangzhou, 510006, China.
| | - Guannan Tang
- Department of Biomedical Engineering, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China
- Guangdong Province Key Laboratory of Biomedical Engineering, South China University of Technology, Guangzhou, 510006, China
| | - Ting Ma
- Department of Biomedical Engineering, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China
- National Engineering Research Center for Tissue Restoration and Reconstruction, Guangzhou, 510006, China
| | - Xiaodong Cao
- Department of Biomedical Engineering, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China.
- Guangdong Province Key Laboratory of Biomedical Engineering, South China University of Technology, Guangzhou, 510006, China.
- National Engineering Research Center for Tissue Restoration and Reconstruction, Guangzhou, 510006, China.
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Parent M, Boudier A, Perrin J, Vigneron C, Maincent P, Violle N, Bisson JF, Lartaud I, Dupuis F. In Situ Microparticles Loaded with S-Nitrosoglutathione Protect from Stroke. PLoS One 2015; 10:e0144659. [PMID: 26646285 PMCID: PMC4672927 DOI: 10.1371/journal.pone.0144659] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Accepted: 11/20/2015] [Indexed: 11/18/2022] Open
Abstract
Treatment of stroke, especially during the first hours or days, is still lacking. S-nitrosoglutathione (GSNO), a cerebroprotective agent with short life time, may help if administered early with a sustain delivery while avoiding intensive reduction in blood pressure. We developed in situ forming implants (biocompatible biodegradable copolymer) and microparticles (same polymer and solvent emulsified with an external oily phase) of GSNO to lengthen its effects and allow cerebroprotection after a single subcutaneous administration to Wistar rats. Arterial pressure was recorded for 3 days (telemetry, n = 14), whole-blood platelet aggregation up to 13 days (aggregometry, n = 58), and neurological score, cerebral infarct size and edema volume for 2 days after obstruction of the middle cerebral artery by autologous blood clots (n = 30). GSNO-loaded formulations (30 mg/kg) induced a slighter and longer hypotension (-10 vs. -56 ± 6 mmHg mean arterial pressure, 18 h vs. 40 min) than free GSNO at the same dose. The change in pulse pressure (-50%) lasted even up to 42 h for microparticles. GSNO-loaded formulations (30 mg/kg) prevented the transient 24 h hyper-aggregability observed with free GSNO and 7.5 mg/kg-loaded formulations. When injected 2 h after stroke, GSNO-loaded microparticles (30 mg/kg) reduced neurological score at 24 (-62%) and 48 h (-75%) vs. empty microparticles and free GSNO 7.5 mg/kg and, compared to free GSNO, divided infarct size by 10 and edema volume by 8 at 48 h. Corresponding implants reduced infarct size and edema volume by 2.5 to 3 times. The longer (at least 2 days) but slight effects on arterial pressures show sustained delivery of GSNO-loaded formulations (30 mg/kg), which prevent transient platelet hyper-responsiveness and afford cerebroprotection against the consequences of stroke. In conclusion, in situ GSNO-loaded formulations are promising candidates for the treatment of stroke.
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Affiliation(s)
- Marianne Parent
- CITHÉFOR EA 3452, Faculty of Pharmacy, Université de Lorraine, Nancy, France
| | - Ariane Boudier
- CITHÉFOR EA 3452, Faculty of Pharmacy, Université de Lorraine, Nancy, France
| | - Julien Perrin
- INSERM U1116, Faculty of Medicine, Université de Lorraine, Vandœuvre-lès-Nancy, France
| | - Claude Vigneron
- CITHÉFOR EA 3452, Faculty of Pharmacy, Université de Lorraine, Nancy, France
| | - Philippe Maincent
- CITHÉFOR EA 3452, Faculty of Pharmacy, Université de Lorraine, Nancy, France
| | - Nicolas Violle
- ETAP–Ethologie Appliquée, Research Centre in Pharmacology, Nutrition and Toxicology, Vandœuvre-lès-Nancy, France
| | - Jean-François Bisson
- ETAP–Ethologie Appliquée, Research Centre in Pharmacology, Nutrition and Toxicology, Vandœuvre-lès-Nancy, France
| | - Isabelle Lartaud
- CITHÉFOR EA 3452, Faculty of Pharmacy, Université de Lorraine, Nancy, France
| | - François Dupuis
- CITHÉFOR EA 3452, Faculty of Pharmacy, Université de Lorraine, Nancy, France
- * E-mail:
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Wang F, Su XX, Guo YC, Li A, Zhang YC, Zhou H, Qiao H, Guan LM, Zou M, Si XQ. Bone regeneration by nanohydroxyapatite/chitosan/poly(lactide-co-glycolide) scaffolds seeded with human umbilical cord mesenchymal stem cells in the calvarial defects of the nude mice. BIOMED RESEARCH INTERNATIONAL 2015; 2015:261938. [PMID: 26550565 PMCID: PMC4621339 DOI: 10.1155/2015/261938] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Revised: 09/11/2015] [Accepted: 09/15/2015] [Indexed: 11/29/2022]
Abstract
In the preliminary study, we have found an excellent osteogenic property of nanohydroxyapatite/chitosan/poly(lactide-co-glycolide) (nHA/CS/PLGA) scaffolds seeded with human umbilical cord mesenchymal stem cells (hUCMSCs) in vitro and subcutaneously in the nude mice. The aim of this study was to further evaluate the osteogenic capacity of nHA/CS/PLGA scaffolds seeded with hUCMSCs in the calvarial defects of the nude mice. Totally 108 nude mice were included and divided into 6 groups: PLGA scaffolds + hUCMSCs; nHA/PLGA scaffolds + hUCMSCs; CS/PLGA scaffolds + hUCMSCs; nHA/CS/PLGA scaffolds + hUCMSCs; nHA/CS/PLGA scaffolds without seeding; the control group (no scaffolds) (n = 18). The scaffolds were implanted into the calvarial defects of nude mice. The amount of new bones was evaluated by fluorescence labeling, H&E staining, and Van Gieson staining at 4 and 8 weeks, respectively. The results demonstrated that the amount of new bones was significantly increased in the group of nHA/CS/PLGA scaffolds seeded with hUCMSCs (p < 0.01). On the basis of previous studies in vitro and in subcutaneous implantation of the nude mice, the results revealed that the nHA and CS also enhanced the bone regeneration by nHA/CS/PLGA scaffolds seeded with hUCMSCs in the calvarial defects of the nude mice at early stage.
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Affiliation(s)
- Fei Wang
- Department of Orthodontics, Stomatological Hospital, College of Medicine, Xi'an Jiaotong University, Xi'an 710004, China
| | - Xiao-Xia Su
- Department of Orthodontics, Stomatological Hospital, College of Medicine, Xi'an Jiaotong University, Xi'an 710004, China
| | - Yu-Cheng Guo
- Department of Orthodontics, Stomatological Hospital, College of Medicine, Xi'an Jiaotong University, Xi'an 710004, China
| | - Ang Li
- Research Center for Stomatology, Stomatological Hospital, College of Medicine, Xi'an Jiaotong University, Xi'an 710004, China
| | - Yin-Cheng Zhang
- Department of Oral and Maxillofacial Surgery, Stomatological Hospital, College of Medicine, Xi'an Jiaotong University, Xi'an 710004, China
| | - Hong Zhou
- Department of Orthodontics, Stomatological Hospital, College of Medicine, Xi'an Jiaotong University, Xi'an 710004, China
| | - Hu Qiao
- Department of Orthodontics, Stomatological Hospital, College of Medicine, Xi'an Jiaotong University, Xi'an 710004, China
| | - Li-Min Guan
- Department of Orthodontics, Stomatological Hospital, College of Medicine, Xi'an Jiaotong University, Xi'an 710004, China
| | - Min Zou
- Department of Orthodontics, Stomatological Hospital, College of Medicine, Xi'an Jiaotong University, Xi'an 710004, China
| | - Xin-Qin Si
- Department of Orthodontics, Stomatological Hospital, College of Medicine, Xi'an Jiaotong University, Xi'an 710004, China
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Chang DP, Garripelli VK, Rea J, Kelley R, Rajagopal K. Investigation of Fragment Antibody Stability and Its Release Mechanism from Poly(Lactide-co-Glycolide)-Triacetin Depots for Sustained-Release Applications. J Pharm Sci 2015; 104:3404-17. [DOI: 10.1002/jps.24546] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Revised: 05/14/2015] [Accepted: 05/18/2015] [Indexed: 12/11/2022]
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Phaechamud T, Mahadlek J. Solvent exchange-induced in situ forming gel comprising ethyl cellulose-antimicrobial drugs. Int J Pharm 2015; 494:381-92. [PMID: 26302862 DOI: 10.1016/j.ijpharm.2015.08.047] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Revised: 07/02/2015] [Accepted: 08/17/2015] [Indexed: 11/27/2022]
Abstract
Solvent-exchanged in situ forming gel is a drug delivery system which is in sol form before administration. When it contacts with the body fluid, then the water miscible organic solvent dissipates and water penetrates into the system, leading the polymer precipitation as in situ gel at the site of injection. The aim of this research was to study the parameters affecting the gel properties, drug release and antimicrobial activities of the in situ forming gels prepared from ethyl cellulose (EC) dissolved in N-methyl pyrrolidone (NMP) to deliver the antimicrobial agents (doxycycline hyclate, metronidazole and benzyl peroxide) for periodontitis treatment. The gel appearance, pH, viscosity, rheology, syringeability, gel formation, rate of water diffusion into the gels, in vitro degradation, drug release behavior and antimicrobial activities against Staphylococcus aureus, Escherichia coli, Candida albicans, Streptococcus mutans and Porphyrommonas gingivalis were determined. Increasing the amount of EC increased the viscosity of system while still exhibiting Newtonian flow and increased the work of syringeability whereas decreased the releasing of drug. The system transformed into the rigid gel formation after being injected into the simulated gingival crevicular fluid. The developed systems containing 5% w/w antimicrobial agent showed the antimicrobial activities against all test bacteria. Thus the developed solvent exchange-induced in situ forming gels comprising EC-antimicrobial drugs exhibited potential use for periodontitis treatment.
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Affiliation(s)
- Thawatchai Phaechamud
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Silpakorn University, Nakorn Pathom 73000, Thailand.
| | - Jongjan Mahadlek
- Pharmaceutical Intelligence Unit Prachote Plengwittaya, Faculty of Pharmacy, Silpakorn University, Nakorn Pathom 73000, Thailand
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Rahimi M, Mobedi H, Behnamghader A. In situforming poly(lactic acid-co-glycolic acid) implants containing leuprolide acetate/β-cyclodextrin complexes: preparation, characterization, andin vitrodrug release. INT J POLYM MATER PO 2015. [DOI: 10.1080/00914037.2015.1055633] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Do MP, Neut C, Metz H, Delcourt E, Siepmann J, Mäder K, Siepmann F. Mechanistic analysis of PLGA/HPMC-based in-situ forming implants for periodontitis treatment. Eur J Pharm Biopharm 2015; 94:273-83. [PMID: 26047797 DOI: 10.1016/j.ejpb.2015.05.018] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Revised: 04/28/2015] [Accepted: 05/21/2015] [Indexed: 11/20/2022]
Abstract
In-situ forming implant formulations based on poly(lactic-co-glycolic acid) (PLGA), acetyltributyl citrate (ATBC), minocycline HCl, N-methyl pyrrolidone (NMP) and optionally hydroxypropyl methylcellulose (HPMC) were prepared and thoroughly characterized in vitro. This includes electron paramagnetic resonance (EPR), nuclear magnetic resonance ((1)H NMR), mass change and drug release measurements under different conditions, optical microscopy, size exclusion chromatography (SEC) as well as antibacterial activity tests using gingival crevicular fluid samples from periodontal pockets of periodontitis patients. Based on these results, deeper insight into the physico-chemical phenomena involved in implant formation and the control of drug release could be gained. For instance, the effects of adding HPMC to the formulations, resulting in improved implant adherence and reduced swelling, could be explained. Importantly, the in-situ formed implants effectively hindered the growth of bacteria present in the patients' periodontal pockets. Interestingly, the systems were more effectively hindering the growth of pathogenic bacterial strains (e.g., Fusobacterium nucleatum) than that of strains with a lower pathogenic potential (e.g., Streptococcus salivarius). In vivo, such a preferential action against the pathogenic bacteria can be expected to give a chance to the healthy flora to re-colonize the periodontal pockets.
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Affiliation(s)
- M P Do
- University of Lille, College of Pharmacy, 3 Rue du Prof. Laguesse, 59006 Lille, France; INSERM U 1008, Controlled Drug Delivery Systems and Biomaterials, 3 Rue du Prof. Laguesse, 59006 Lille, France
| | - C Neut
- University of Lille, College of Pharmacy, 3 Rue du Prof. Laguesse, 59006 Lille, France; INSERM U 995, Inflammatory Bowel Diseases, 3 Rue du Prof. Laguesse, 59006 Lille, France
| | - H Metz
- Martin-Luther-University Halle-Wittenberg, Department of Pharmaceutics and Biopharmaceutics, Halle/Saale, Germany
| | - E Delcourt
- INSERM U 1008, Controlled Drug Delivery Systems and Biomaterials, 3 Rue du Prof. Laguesse, 59006 Lille, France; University of Lille, School of Dentistry, Place de Verdun, 59000 Lille, France
| | - J Siepmann
- University of Lille, College of Pharmacy, 3 Rue du Prof. Laguesse, 59006 Lille, France; INSERM U 1008, Controlled Drug Delivery Systems and Biomaterials, 3 Rue du Prof. Laguesse, 59006 Lille, France
| | - K Mäder
- Martin-Luther-University Halle-Wittenberg, Department of Pharmaceutics and Biopharmaceutics, Halle/Saale, Germany
| | - F Siepmann
- University of Lille, College of Pharmacy, 3 Rue du Prof. Laguesse, 59006 Lille, France; INSERM U 1008, Controlled Drug Delivery Systems and Biomaterials, 3 Rue du Prof. Laguesse, 59006 Lille, France.
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135
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Parent M, Boudier A, Fries I, Gostyńska A, Rychter M, Lulek J, Leroy P, Gaucher C. Nitric oxide-eluting scaffolds and their interaction with smooth muscle cells in vitro. J Biomed Mater Res A 2015; 103:3303-11. [PMID: 25809572 DOI: 10.1002/jbm.a.35464] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 03/06/2015] [Accepted: 03/18/2015] [Indexed: 12/28/2022]
Abstract
Fabrication of scaffolds loaded with nitric oxide (NO) donors (S-nitrosoglutathione, GSNO, and isosorbide mononitrate, ISMN) with suitable cell compatibility and optimized properties for tissue-engineering applications is reported using "in situ" technique. Based on FDA-approved polymer, solvent and dosage forms, this gentle process allowed the incorporation of the GSNO labile drug into scaffolds made of either poly(lactide-co-glycolide) (PLGA) or PLGA/poly(ɛ-caprolactone) (PCL) blend. During scaffolds manufacturing process including washing cycles, NO donors were leached from scaffolds. However, GSNO and ISMN concentrations in the last washing medium (10(-7) M and 10(-4) M, respectively) were in the range of cell suitability for tissue engineering. Further morphological analyses indicated that smoother surfaces with fewer but bigger pores (compatible with cell penetration and ingrowth) were obtained with PLGA in comparison with PLGA/PCL scaffolds. Among all tested matrices, only unloaded PLGA and GSNO-loaded PLGA/PCL exhibited intermediate cell anchorage, with mitochondrial activity close to the control and an increase in protein content, a prognostic for scaffold cell colonization, defining them as promising candidates. Deeper analyses of these two scaffolds looking at intracellular redox balance through reactive oxygen species production, glutathione, S-nitrosothiols, and nitrite ions content exhibited GSNO-loaded PLGA/PCL as the best of all tested 3D scaffolds for tissue engineering.
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Affiliation(s)
- Marianne Parent
- Faculté De Pharmacie, Université De Lorraine, CITHEFOR EA 3452, BP 80403, Nancy Cedex, F-54001, France
| | - Ariane Boudier
- Faculté De Pharmacie, Université De Lorraine, CITHEFOR EA 3452, BP 80403, Nancy Cedex, F-54001, France
| | - Isabelle Fries
- Faculté De Pharmacie, Université De Lorraine, CITHEFOR EA 3452, BP 80403, Nancy Cedex, F-54001, France
| | - Aleksandra Gostyńska
- Faculté De Pharmacie, Université De Lorraine, CITHEFOR EA 3452, BP 80403, Nancy Cedex, F-54001, France.,Department of Pharmaceutical Technology, Faculty of Pharmacy, Poznan University of Medical Sciences, Poland
| | - Marek Rychter
- Faculté De Pharmacie, Université De Lorraine, CITHEFOR EA 3452, BP 80403, Nancy Cedex, F-54001, France.,Department of Pharmaceutical Technology, Faculty of Pharmacy, Poznan University of Medical Sciences, Poland
| | - Janina Lulek
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Poznan University of Medical Sciences, Poland
| | - Pierre Leroy
- Faculté De Pharmacie, Université De Lorraine, CITHEFOR EA 3452, BP 80403, Nancy Cedex, F-54001, France
| | - Caroline Gaucher
- Faculté De Pharmacie, Université De Lorraine, CITHEFOR EA 3452, BP 80403, Nancy Cedex, F-54001, France
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136
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Long-acting injectable hormonal dosage forms for contraception. Pharm Res 2015; 32:2180-91. [PMID: 25899076 DOI: 10.1007/s11095-015-1686-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Accepted: 03/20/2015] [Indexed: 11/27/2022]
Abstract
Although great efforts have been made to develop long-acting injectable hormonal contraceptives for more than four decades, few long-acting injectable contraceptives have reached the pharmaceutical market or even entered clinical trials. On the other hand, in clinical practice there is an urgent need for injectable long-acting reversible contraceptives which can provide contraceptive protection for more than 3 months after one single injection. Availability of such products will offer great flexibility to women and resolve certain continuation issues currently occurring in clinics. Herein, we reviewed the strategies exploited in the past to develop injectable hormonal contraceptive dosages including drug microcrystal suspensions, drug-loaded microsphere suspensions and in situ forming depot systems for long-term contraception and discussed the potential solutions for remaining issues met in the previous development.
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137
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Do MP, Neut C, Metz H, Delcourt E, Mäder K, Siepmann J, Siepmann F. In-situ forming composite implants for periodontitis treatment: How the formulation determines system performance. Int J Pharm 2015; 486:38-51. [PMID: 25791762 DOI: 10.1016/j.ijpharm.2015.03.026] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Revised: 03/10/2015] [Accepted: 03/13/2015] [Indexed: 11/27/2022]
Abstract
Periodontitis is the primary cause of tooth loss in adults and a very wide-spread disease. Recently, composite implants, based on a drug release rate controlling polymer and an adhesive polymer, have been proposed for an efficient local drug treatment. However, the processes involved in implant formation and the control of drug release in these composite systems are complex and the relationships between the systems' composition and the implants' performance are yet unclear. In this study, advanced characterization techniques (e.g., electron paramagnetic resonance, EPR) were applied to better understand the in-situ forming implants based on: (i) different types of poly(lactic-co-glycolic acid) (PLGA) as drug release rate controlling polymers; (ii) hydroxypropyl methylcellulose (HPMC) as adhesive polymer; and (iii) doxycycline or metronidazole as drugs. Interestingly, HPMC addition to shorter chain PLGA slightly slows down drug release, whereas in the case of longer chain PLGA the release rate substantially increases. This opposite impact on drug release was rather surprising, since the only difference in the formulations was the polymer molecular weight of the PLGA. Based on the physico-chemical analyses, the underlying mechanisms could be explained as follows: since longer chain PLGA is more hydrophobic than shorter chain PLGA, the addition of HPMC leads to a much more pronounced facilitation of water penetration into the system (as evidenced by EPR). This and the higher polymer lipophilicity result in more rapid PLGA precipitation and a more porous inner implant structure. Consequently, drug release is accelerated. In contrast, water penetration into formulations based on shorter chain PLGA is rather similar in the presence and absence of HPMC and the resulting implants are much less porous than those based on longer chain PLGA.
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Affiliation(s)
- M P Do
- University of Lille, College of Pharmacy, 3 Rue du Prof. Laguesse, 59006 Lille, France; INSERM U 1008, 3 Rue du Prof. Laguesse, Lille 59006, France
| | - C Neut
- University of Lille, College of Pharmacy, 3 Rue du Prof. Laguesse, 59006 Lille, France; INSERM U 995, 3 Rue du Prof. Laguesse, Lille 59006, France
| | - H Metz
- Martin-Luther-University Halle-Wittenberg, Department of Pharmaceutics and Biopharmaceutics, Halle/Saale, Germany
| | - E Delcourt
- INSERM U 1008, 3 Rue du Prof. Laguesse, Lille 59006, France; University of Lille, School of Dentistry, Place de Verdun, Lille 59000, France
| | - K Mäder
- Martin-Luther-University Halle-Wittenberg, Department of Pharmaceutics and Biopharmaceutics, Halle/Saale, Germany
| | - J Siepmann
- University of Lille, College of Pharmacy, 3 Rue du Prof. Laguesse, 59006 Lille, France; INSERM U 1008, 3 Rue du Prof. Laguesse, Lille 59006, France
| | - F Siepmann
- University of Lille, College of Pharmacy, 3 Rue du Prof. Laguesse, 59006 Lille, France; INSERM U 1008, 3 Rue du Prof. Laguesse, Lille 59006, France.
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138
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Wang J, Li D, Li T, Ding J, Liu J, Li B, Chen X. Gelatin Tight-Coated Poly(lactide- co-glycolide) Scaffold Incorporating rhBMP-2 for Bone Tissue Engineering. MATERIALS 2015; 8:1009-1026. [PMID: 28787985 PMCID: PMC5455445 DOI: 10.3390/ma8031009] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 03/02/2015] [Accepted: 03/04/2015] [Indexed: 01/05/2023]
Abstract
Surface coating is the simplest surface modification. However, bioactive molecules can not spread well on the commonly used polylactone-type skeletons; thus, the surface coatings of biomolecules are typically unstable due to the weak interaction between the polymer and the bioactive molecules. In this study, a special type of poly(lactide-co-glycolide) (PLGA)-based scaffold with a loosened skeleton was fabricated by phase separation, which allowed gelatin molecules to more readily diffuse throughout the structure. In this application, gelatin modified both the internal substrate and external surface. After cross-linking with glutaraldehyde, the surface layer gelatin was tightly bound to the diffused gelatin, thereby preventing the surface layer gelatin coating from falling off within 14 days. After gelatin modification, PLGA scaffold demonstrated enhanced hydrophilicity and improved mechanical properties (i.e., increased compression strength and elastic modulus) in dry and wet states. Furthermore, a sustained release profile of recombinant human bone morphogenetic protein-2 (rhBMP-2) was achieved in the coated scaffold. The coated scaffold also supported the in vitro attachment, proliferation, and osteogenesis of rabbit bone mesenchymal stem cells (BMSCs), indicating the bioactivity of rhBMP-2. These results collectively demonstrate that the cross-linked-gelatin-coated porous PLGA scaffold incorporating bioactive molecules is a promising candidate for bone tissue regeneration.
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Affiliation(s)
- Juan Wang
- Key Laboratory of Cancer Prevention and Therapy, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300070, China.
- Department of Radiation Oncology, Shandong Cancer Hospital, Shandong Academy of Medical Sciences, Jinan 250117, China.
| | - Dongsong Li
- Department of Orthopaedic Surgery, the First Hospital of Jilin University, Changchun 130021, China.
| | - Tianyi Li
- Orthopedics Dept. 2, Heilongjiang Provincial Corps Hospital of Chinese People's Armed Police Forces, Harbin 150076, China.
| | - Jianxun Ding
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
| | - Jianguo Liu
- Department of Orthopaedic Surgery, the First Hospital of Jilin University, Changchun 130021, China.
| | - Baosheng Li
- Key Laboratory of Cancer Prevention and Therapy, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300070, China.
- Department of Radiation Oncology, Shandong Cancer Hospital, Shandong Academy of Medical Sciences, Jinan 250117, China.
| | - Xuesi Chen
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
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139
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Saadat E, Abdollahi A, Dorkoosh FA. Fabrication and Characterization of Risperidone Implants as an Extended Antipsychotic Delivery System, Exploring the Role of Excipients. J Pharm Innov 2015. [DOI: 10.1007/s12247-015-9212-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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140
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Zhang C, Liu D, Zhang X, Wang P, Zhen Z, Li J, Yi D, Jin Y, Yang D. Design and in vivoassessment of polyester copolymers based on trimethylene carbonate and ε-caprolactone. J Appl Polym Sci 2015. [DOI: 10.1002/app.41815] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Chong Zhang
- Department of Pharmaceutics; Liaoning Research Institute of Family Planning; Shenyang 110031 People's Republic of China
| | - Danhua Liu
- Department of Pharmaceutics; Liaoning Research Institute of Family Planning; Shenyang 110031 People's Republic of China
| | - Xiaowei Zhang
- Department of Pharmaceutics; Liaoning Research Institute of Family Planning; Shenyang 110031 People's Republic of China
| | - Ping Wang
- Department of Pharmaceutics; Liaoning Research Institute of Family Planning; Shenyang 110031 People's Republic of China
| | - Zhu Zhen
- Department of Pharmaceutics; Liaoning Research Institute of Family Planning; Shenyang 110031 People's Republic of China
| | - Jianxin Li
- Department of Pharmaceutics; Liaoning Research Institute of Family Planning; Shenyang 110031 People's Republic of China
| | - Dongxu Yi
- Department of Pharmaceutics; Liaoning Research Institute of Family Planning; Shenyang 110031 People's Republic of China
| | - Ying Jin
- Department of Pharmaceutics; Liaoning Research Institute of Family Planning; Shenyang 110031 People's Republic of China
| | - Dan Yang
- Department of Pharmaceutics; Liaoning Research Institute of Family Planning; Shenyang 110031 People's Republic of China
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141
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Fisher PD, Venugopal G, Milbrandt TA, Hilt JZ, Puleo DA. Hydroxyapatite-reinforced in situ forming PLGA systems for intraosseous injection. J Biomed Mater Res A 2014; 103:2365-73. [PMID: 25424622 DOI: 10.1002/jbm.a.35375] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Accepted: 11/18/2014] [Indexed: 11/06/2022]
Abstract
In situ forming poly(lactic-co-glycolic acid) (PLGA) implants have not been strongly considered for bone applications because of their poor mechanical properties. Here, in situ forming scaffolds containing hydroxyapatite micro- and nanoparticles were characterized to determine their mechanical properties, injectability, and microarchitecture. Scaffolds were prepared with various concentrations of hydroxyapatite, as well as poly(β-amino ester) microparticles that facilitate drug delivery. Strength was increased threefold, from 2 to 6 MPa, while compressive modulus was improved sixfold, from 24 to 141 MPa, via the addition of 30% nanohydroxyapatite, which provided greater benefits at equivalent concentrations compared to micro-hydroxyapatite. Scaffolds retained a uniformly porous microarchitecture, and hydroxyapatite particles were distributed evenly throughout the PLGA phase. Injectability, determined by the force required to inject 0.5 mL of material within 60 s, remained clinically acceptable at <50 N at 30% w/w hydroxyapatite and up to 10% w/w PBAE microparticles. Ex vivo injections into intact porcine femoral heads increased compressive modulus of trabecular bone from 81 to 180 MPa and strength from 3.5 to 5.9 MPa. This injectable scaffold offers mechanical reinforcement coupled with previously demonstrated drug delivery potential in a single injection for bone-weakening conditions, such as osteonecrosis or osteoporosis.
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Affiliation(s)
- Paul D Fisher
- Department of Biomedical Engineering, University of Kentucky, Lexington, Kentucky, 40506
| | | | - Todd A Milbrandt
- Department of Orthopaedic Surgery, Mayo Clinic, Rochester, Minnesota, 55905
| | - J Zach Hilt
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky, 40506
| | - David A Puleo
- Department of Biomedical Engineering, University of Kentucky, Lexington, Kentucky, 40506
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142
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Wang W, Jashnani A, Aluri SR, Gustafson JA, Hsueh PY, Yarber F, McKown RL, Laurie GW, Hamm-Alvarez SF, MacKay JA. A thermo-responsive protein treatment for dry eyes. J Control Release 2014; 199:156-67. [PMID: 25481446 DOI: 10.1016/j.jconrel.2014.11.016] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2014] [Revised: 10/30/2014] [Accepted: 11/17/2014] [Indexed: 11/27/2022]
Abstract
Millions of Americans suffer from dry eye disease, and there are few effective therapies capable of treating these patients. A decade ago, an abundant protein component of human tears was discovered and named lacritin (Lacrt). Lacrt has prosecretory activity in the lacrimal gland and mitogenic activity at the corneal epithelium. Similar to other proteins placed on the ocular surface, the durability of its effect is limited by rapid tear turnover. Motivated by the rationale that a thermo-responsive coacervate containing Lacrt would have better retention upon administration, we have constructed and tested the activity of a thermo-responsive Lacrt fused to an elastin-like polypeptide (ELP). Inspired from the human tropoelastin protein, ELP protein polymers reversibly phase separate into viscous coacervates above a tunable transition temperature. This fusion construct exhibited the prosecretory function of native Lacrt as illustrated by its ability to stimulate β-hexosaminidase secretion from primary rabbit lacrimal gland acinar cells. It also increased tear secretion from non-obese diabetic (NOD) mice, a model of autoimmune dacryoadenitis, when administered via intra-lacrimal injection. Lacrt ELP fusion proteins undergo temperature-mediated assembly to form a depot inside the lacrimal gland. We propose that these Lacrt ELP fusion proteins represent a potential therapy for dry eye disease and the strategy of ELP-mediated phase separation may have applicability to other diseases of the ocular surface.
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Affiliation(s)
- Wan Wang
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA, United States
| | - Aarti Jashnani
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA, United States
| | - Suhaas R Aluri
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA, United States
| | - Joshua A Gustafson
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA, United States
| | - Pang-Yu Hsueh
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA, United States
| | - Frances Yarber
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA, United States
| | - Robert L McKown
- Department of Integrated Science and Technology, James Madison University, Harrisonburg, VA, United States
| | - Gordon W Laurie
- Department of Cell Biology, School of Medicine of the University of Virginia, Charlottesville, VA, United States
| | - Sarah F Hamm-Alvarez
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA, United States; Department of Physiology and Biophysics, Keck School of Medicine of the University of Southern California, Los Angeles, CA, United States
| | - J Andrew MacKay
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA, United States; Department of Biomedical Engineering, University of Southern California, Los Angeles, CA, United States.
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143
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Shi X, Lin X, Zheng X, Feng Y, Shen L. Injectable long-acting systems for Radix Ophiopogonis polysaccharide based on mono-PEGylation and in situ formation of a PLGA depot. Int J Nanomedicine 2014; 9:5555-63. [PMID: 25489243 PMCID: PMC4257019 DOI: 10.2147/ijn.s71819] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background Radix Ophiopogonis polysaccharide (ROP), a highly hydrophilic macromolecule, has a unique anti-ischemic action in the myocardium. One of the main problems with its use is its relatively short half-life in vivo. To solve this problem, injectable long-acting drug delivery systems, which combine mono-PEGylation (PEG, polyethylene glycol) with the in situ formation of poly(d,l-lactide-co-glycolide) copolymer (PLGA) depots, were tested in this study. Methods Through a moderate coupling reaction between 20 kDa amino-terminated methoxy-PEG and excessive ROP with activated hydroxyls, a long-circulating and bioactive mono-PEGylated ROP was prepared and characterized. A reasonable and applicable range of PLGA formulations loaded with the mono-PEGylated ROP were prepared, characterized, and evaluated in vivo. Results Relative to ROP, the half-life of which was only 0.5 hours, the conjugate alone, following subcutaneous administration, showed markedly prolonged retention in the systemic circulation, with a mean residence time in vivo of approximately 2.76 days. In combination with in situ-forming PLGA depots, the residence time of the conjugate in vivo was prolonged further. In particular, a long-lasting and steady plasma exposure for nearly a month was achieved by the formulation comprising 40% 30 kDa PLGA in N-methyl-2-pyrrolidone. Conclusion Long-lasting and steady drug exposure could be achieved using mono-PEGylation in combination with in situ formation of PLGA depots. Such a combination with ROP would be promising for long-term prophylaxis and/or treatment of myocardial ischemia. For high-dose and highly hydrophilic macromolecular drugs like ROP, more than one preparation technology might be needed to achieve week-long or month-long delivery per dosing.
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Affiliation(s)
- XiaoLi Shi
- College of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
| | - Xiao Lin
- College of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
| | - XiangWei Zheng
- Engineering Research Center of Modern Preparation Technology of TCM of Ministry of Education, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
| | - Yi Feng
- Engineering Research Center of Modern Preparation Technology of TCM of Ministry of Education, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
| | - Lan Shen
- College of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China ; Engineering Research Center of Modern Preparation Technology of TCM of Ministry of Education, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
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144
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Chen Y, Jiang L, Wang R, Lu M, Zhang Q, Zhou Y, Wang Z, Lu G, Liang P, Ran H, Chen H, Zheng Y. Injectable smart phase-transformation implants for highly efficient in vivo magnetic-hyperthermia regression of tumors. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:7468-73. [PMID: 25167961 DOI: 10.1002/adma.201402509] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Revised: 07/20/2014] [Indexed: 05/06/2023]
Abstract
A minimally invasive, highly efficient and versatile strategy is proposed for localized tumor regression by developing a smart injectable liquid-solid phase-transformation organic-inorganic hybrid composite material, i.e., magnetic-Fe-powder-dispersed PLGA (Fe/PLGA) implants for magnetic hyperthermia therapy of cancer.
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Affiliation(s)
- Yu Chen
- State Key Laboratory of High Performance Ceramics and Superfine microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 200050, Shanghai, P. R. China
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145
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Schweizer D, Serno T, Goepferich A. Controlled release of therapeutic antibody formats. Eur J Pharm Biopharm 2014; 88:291-309. [DOI: 10.1016/j.ejpb.2014.08.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Revised: 06/30/2014] [Accepted: 08/03/2014] [Indexed: 10/24/2022]
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146
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Dittrich M, Snejdrova E. Cyclic swelling as a phenomenon inherent to biodegradable polyesters. J Pharm Sci 2014; 103:3560-3566. [PMID: 25241844 DOI: 10.1002/jps.24146] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 07/08/2014] [Accepted: 08/06/2014] [Indexed: 11/06/2022]
Abstract
The aim of this study is to evaluate and describe the phenomenon and mechanism of the spontaneous cyclic swelling and deswelling of linear and branched aliphatic polyesters in the aqueous medium. The fluctuation of gel volume in one or several cycles as an inherent property of biodegradable and bioerodible materials has not yet been described. We have observed the process at linear and branched polyesters of aliphatic α-hydroxy acids. The period of duration of cycles was in order of hours to days, as influenced by the size of the bodies ranging from 25 to 1000 mg, the temperature in the range of 7°C-42°C, ionic strength, and pH value. The results demonstrated that swelling is accompanied by hydrolysis of ester bonds with the development of small water-soluble osmotically active molecules. After reaching a higher degree of swelling, the obstruction effect of the gel decreases and the diffusion of soluble degradation products from the body to the environment prevails. A decrease in osmotic pressure inside the body and a decrease in the hydrophilic character of the gel matrix result in deswelling by a collapse of the structure, probably due to hydrophobic interactions of nonpolar polyester chains.
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Affiliation(s)
- Milan Dittrich
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Charles University in Prague, 500 05, Hradec Kralove, Czech Republic
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147
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Shi X, Lin X, Yao C, Shen L, Feng Y. Injectable long-acting in situ forming systems for Radix Ophiopogonis polysaccharide. Int J Biol Macromol 2014; 72:553-9. [PMID: 25236608 DOI: 10.1016/j.ijbiomac.2014.09.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Accepted: 09/08/2014] [Indexed: 11/19/2022]
Abstract
In the area of injectable long-acting formulations, the in situ forming system (ISFS) is an attractive alternative for its various superiorities. In this study, both hydrophilic and hydrophobic in situ forming systems, using Poloxamer and sucrose acetate isobutyrate (SAIB) or poly(D,L-lactide-co-glycolide) copolymer (PLGA) as carrier, respectively, were investigated for Radix Ophiopogonis polysaccharide (ROP), a natural anti-myocardial ischemic fructan. A reasonable and applicable range of formulations were selected from each carrier for in vivo study by investigating their rheological property. The results from in vivo evaluation show that relatively promising sustained behaviors were achieved by formulations 24% P407/10% P188, 40% PLGA30k/NMP, and 30% PLGA50k/NMP. Significant differences of drug release kinetics were observed between in situ thermally-induced Poloxamer-based hydrogels and in situ solvent exchange-induced hydrophobic PLGA depots. This suggests that different ISFS could be chosen to provide different application purpose for polysaccharide drugs. In the case of ROP, Poloxamer-based ISFS is promising for short-term acute therapies; however, PLGA-based ISFS might be promising for long-term precaution or/and cure of myocardial ischemia.
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Affiliation(s)
- XiaoLi Shi
- College of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, PR China
| | - Xiao Lin
- College of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, PR China; Engineering Research Center of Modern Preparation Technology of TCM of Ministry of Education, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, PR China.
| | - ChunXia Yao
- College of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, PR China
| | - Lan Shen
- College of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, PR China
| | - Yi Feng
- Engineering Research Center of Modern Preparation Technology of TCM of Ministry of Education, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, PR China.
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148
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Parenteral thermo-sensitive organogel for schizophrenia therapy, in vitro and in vivo evaluation. Eur J Pharm Sci 2014; 60:40-8. [DOI: 10.1016/j.ejps.2014.04.020] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Revised: 03/14/2014] [Accepted: 04/28/2014] [Indexed: 11/19/2022]
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149
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Fisher PD, Palomino P, Milbrandt TA, Hilt JZ, Puleo DA. Improved small molecule drug release from in situ forming poly(lactic-co-glycolic acid) scaffolds incorporating poly(β-amino ester) and hydroxyapatite microparticles. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2014; 25:1174-93. [PMID: 24903524 DOI: 10.1080/09205063.2014.923368] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
In situ forming implants are an attractive choice for controlled drug release into a fixed location. Currently, rapidly solidifying solvent exchange systems suffer from a high initial burst, and sustained release behavior is tied to polymer precipitation and degradation rate. The present studies investigated addition of hydroxyapatite (HA) and drug-loaded poly(β-amino ester) (PBAE) microparticles to in situ forming poly(lactic-co-glycolic acid) (PLGA)-based systems to prolong release and reduce burst. PBAEs were synthesized, imbibed with simvastatin (osteogenic) or clodronate (anti-resorptive), and then ground into microparticles. Microparticles were mixed with or without HA into a PLGA solution, and the mixture was injected into buffer, leading to precipitation and creating solid scaffolds with embedded HA and PBAE microparticles. Simvastatin release was prolonged through 30 days, and burst release was reduced from 81 to 39% when loaded into PBAE microparticles. Clodronate burst was reduced from 49 to 32% after addition of HA filler, but release kinetics were unaffected after loading into PBAE microparticles. Scaffold dry mass remained unchanged through day 15, with a pronounced increase in degradation rate after day 30, while wet scaffolds experienced a mass increase through day 25 due to swelling. Porosity and pore size changed throughout degradation, likely due to a combination of swelling and degradation. The system offers improved release kinetics, multiple release profiles, and rapid solidification compared to traditional in situ forming implants.
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Affiliation(s)
- Paul D Fisher
- a Department of Biomedical Engineering , University of Kentucky , Lexington , KY 40506 , USA
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150
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Wu W, Chen H, Shan F, Zhou J, Sun X, Zhang L, Gong T. A novel doxorubicin-loaded in situ forming gel based high concentration of phospholipid for intratumoral drug delivery. Mol Pharm 2014; 11:3378-85. [PMID: 24735404 DOI: 10.1021/mp500019p] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The purpose of this study was to develop a safe and effective drug delivery system for local chemotherapy. A novel injectable in-situ-forming gel system was prepared using small molecule materials, including phospholipids, medium chain triglycerides (MCTs), and ethanol. Thus, this new sustained release system was named PME (first letter of phospholipids, MCT, and ethanol). PME has a well-defined molecule structure, a high degree of safety, and better biocompatible characteristics. It was in sol state with low viscosity in vitro and turned into a solid or semisolid gel in situ after injection. When loaded with doxorubicin (Dox), PME-D (doxorubicin-loaded PME) exhibited notably antitumor efficiency in S180 sarcoma tumors bearing mice after a single intratumoral injection. In vitro, PME-D had remarkable antiproliferative efficacies against MCF-7 breast cancer cells for over 5 days. Moreover, the initial burst effect can hardly be observed from PME system, which was different from many other in-situ-forming gels. The in vivo biodistribution study showed the high Dox concentration in tumors compared with other major organs after PME-D intratumoral administration. The strong signal in tumors was retained for more than 14 days after one single injection. The high concentration of Dox in tumor and long-term retention may explain the superior therapeutic efficacy and reduced side effects. The PME-D in-situ-forming gel system is a promising drug delivery system for local chemotherapy.
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Affiliation(s)
- Wenqi Wu
- Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, Sichuan University , 29 Wangjiang Rd, Chengdu, Sichuan 610041, People's Republic of China
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