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Maulvi FA, Soni PD, Patel PJ, Desai AR, Desai DT, Shukla MR, Shah SA, Shah DO, Willcox MDP. Controlled bimatoprost release from graphene oxide laden contact lenses: In vitro and in vivo studies. Colloids Surf B Biointerfaces 2021; 208:112096. [PMID: 34530331 DOI: 10.1016/j.colsurfb.2021.112096] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Revised: 08/30/2021] [Accepted: 09/01/2021] [Indexed: 11/28/2022]
Abstract
Ocular drug delivery using contact lenses may be able to substitute for eye drop therapy. However, issues with hydrophobic drugs (like bimatoprost that is used to treat glaucoma) such as low drug uptake using a simple soaking method into preformed contact lenses and alteration in the swelling and transmittance of lenses restricts the application for drug delivery. This research uses graphene oxide (GO) to control the release of bimatoprost from contact lenses along with improvements in the drug uptake, and lens swelling and transmittance. GO was loaded into silicone hydrogel contact lenses by adding the GO at the same time as lenses were polymerized. These lenses were soaked in bimatoprost. Alternatively contact lenses, either with or without GO, were produced by adding bimatoprost during lens polymerization. GO improved contact lens swelling due to its water binding capacity and lens transmittance due to the molecular dispersion of bimatoprost on the surface of the GO which prevented the local precipitation of the drug. The bimatoprost uptake was not improved in the presence of GO. However, its in vitro release profile was improved. Adding bimatoprost and GO at the same time as lenses were polymerized (DL-GO-BMT) significantly decreased the loss of drug during extraction and sterilization in comparison to contact lenses (DL-BMT) without GO. As the amount of GO was increased, the DL-GO-BMT lenses showed a significant decrease in the burst and cumulative release of bimatoprost. Ocular irritation and histopathology reports demonstrated the safety of GO contact lens. The in vivo pharmacokinetic studies in the rabbit tear fluid showed significant improvement in mean residence time (MRT) and area under the curve (AUC) with DL-GO-0.2 μg-BMT-100 contact lens in comparison to eye drop solution. The study demonstrated that the addition of GO to contact lenses can control the release of bimatoprost as well as improved the lens swelling and transmittance. However, further optimization is needed to modulate the release of drug within the therapeutic level to manage glaucoma.
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Affiliation(s)
- Furqan A Maulvi
- Maliba Pharmacy College, Uka Tarsadia University, Surat, 394350, India.
| | - Parth D Soni
- Maliba Pharmacy College, Uka Tarsadia University, Surat, 394350, India
| | - Pooja J Patel
- Maliba Pharmacy College, Uka Tarsadia University, Surat, 394350, India
| | - Ankita R Desai
- Maliba Pharmacy College, Uka Tarsadia University, Surat, 394350, India
| | - Ditixa T Desai
- Maliba Pharmacy College, Uka Tarsadia University, Surat, 394350, India
| | - Manish R Shukla
- Centre for Ocular Research & Education (CORE), School of Optometry and Vision Science, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
| | - Shailesh A Shah
- Maliba Pharmacy College, Uka Tarsadia University, Surat, 394350, India
| | - Dinesh O Shah
- Department of Chemical Engineering and Department of Anesthesiology, University of Florida, Gainesville, FL, 32611, USA
| | - Mark D P Willcox
- School of Optometry and Vision, University of New South Wales, Sydney, New South Wales, 2052, Australia
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Maulvi FA, Patel PJ, Soni PD, Desai AR, Desai DT, Shukla MR, Ranch KM, Shah SA, Shah DO. Novel Poly(vinylpyrrolidone)-Coated Silicone Contact Lenses to Improve Tear Volume During Lens Wear: In Vitro and In Vivo Studies. ACS Omega 2020; 5:18148-18154. [PMID: 32743189 PMCID: PMC7391853 DOI: 10.1021/acsomega.0c01764] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 06/30/2020] [Indexed: 06/11/2023]
Abstract
Poly(vinylpyrrolidone) (PVP-K90) is widely used to manage dry eye syndrome (DES). The marketed eye drop solutions (high dose) need frequent instillation, affecting the routine lifestyle of patients. PVP-K90-laden contact lenses can be used to overcome the limitations of eye drop solutions (low bioavailability and frequent instillation). However, the conventional methods of PVP-K90 loading show poor loading capacity and short duration of effect. In the present study, we have developed PVP-K90-coated contact lenses via a short curing approach to increase the PVP-K90 loading capacity with a sustained release profile to manage dry eye syndrome. PVP-K90 was loaded by a soaking method (SM-PVP), direct loading (during fabrication, DL-PVP), a combination of soaking and direct loading (DL-SM-PVP), and a novel coating process (SM-PVP-C and DL-SM-PVP-C). The swelling studies suggested improvement in the water uptake (hydration) property of the contact lenses due to the presence of PVP-K90. The optical transparency was within an acceptable range. The in vitro release of PVP-K90 was in the following order: PVP-coated contact lens (168 h) > DL-SM-PVP (168 h) > DL-PVP (96 h) > SM-PVP (72-96 h). PVP-coated contact lenses showed a high burst effect (lubricating effect) and sustained release (3161-448 ng/h between 24 and 168 h) due to high PVP loading/coating in comparison to the uncoated respective contact lenses (964-113 ng/h between 24 and 96 h). In animal studies, the PVP-K90-coated contact lens showed higher tear volume in comparison to the respective uncoated contact lenses and an eye drop solution. This study demonstrates a novel approach of coating a high amount of PVP-K90 on contact lenses for sustained release to manage several ocular diseases like dry eye syndrome, conjunctivitis, and other ocular injuries.
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Affiliation(s)
- Furqan A. Maulvi
- Maliba
Pharmacy College, Uka Tarsadia University, Surat 394350, India
| | - Pooja J. Patel
- Maliba
Pharmacy College, Uka Tarsadia University, Surat 394350, India
| | - Parth D. Soni
- Maliba
Pharmacy College, Uka Tarsadia University, Surat 394350, India
| | - Ankita R. Desai
- Maliba
Pharmacy College, Uka Tarsadia University, Surat 394350, India
| | - Ditixa T. Desai
- Maliba
Pharmacy College, Uka Tarsadia University, Surat 394350, India
| | - Manish R. Shukla
- Centre
for Ocular Research & Education (CORE), School of Optometry and
Vision Science, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Ketan M. Ranch
- Maliba
Pharmacy College, Uka Tarsadia University, Surat 394350, India
| | - Shailesh A. Shah
- Maliba
Pharmacy College, Uka Tarsadia University, Surat 394350, India
| | - Dinesh O. Shah
- Department
of Chemical Engineering and Department of Anesthesiology, University of Florida, Gainesville, Florida 32611, United States
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Venkatesan AM, Stafford RJ, Duran C, Soni PD, Berlin A, McLaughlin PW. Prostate magnetic resonance imaging for brachytherapists: Diagnosis, imaging pitfalls, and post-therapy assessment. Brachytherapy 2017; 16:688-697. [PMID: 28139419 DOI: 10.1016/j.brachy.2016.12.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Accepted: 12/23/2016] [Indexed: 12/19/2022]
Abstract
Optimal integration of multiparametric MRI (mp MRI) into prostate brachytherapy practice necessitates an understanding of imaging findings pertinent to prostate cancer detection and staging. This review will summarize prostate cancer imaging findings and tumor staging on mp MRI, including an overview of the Prostate Imaging Reporting and Data System (PIRADS)-structured reporting schema, mp MRI findings observed in the post-therapy setting including cases of post-treatment recurrence, and MRI concepts integral to successful salvage brachytherapy.
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Affiliation(s)
- A M Venkatesan
- Section of Abdominal Imaging, Department of Diagnostic Radiology, MD Anderson Cancer Center, Houston, TX.
| | - R J Stafford
- Department of Imaging Physics, MD Anderson Cancer Center, Houston, TX
| | - Cihan Duran
- Section of Abdominal Imaging, Department of Diagnostic Radiology, MD Anderson Cancer Center, Houston, TX
| | - P D Soni
- Department of Radiation Oncology, University of Michigan, Novi, MI
| | - A Berlin
- Department of Radiation Oncology, Princess Margaret Cancer Centre, Toronto, ON
| | - P W McLaughlin
- Department of Radiation Oncology, University of Michigan, Novi, MI
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