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Rodrigo MJ, Garcia-Herranz D, Aragón-Navas A, Subias M, Martinez-Rincón T, Mendez-Martínez S, Cardiel MJ, García-Feijoo J, Ruberte J, Herrero-Vanrell R, Pablo L, Garcia-Martin E, Bravo-Osuna I. Long-term corticosteroid-induced chronic glaucoma model produced by intracameral injection of dexamethasone-loaded PLGA microspheres. Drug Deliv 2021; 28:2427-2446. [PMID: 34763590 PMCID: PMC8592597 DOI: 10.1080/10717544.2021.1998245] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Abstract
PURPOSE To evaluate a new chronic glaucoma model produced by intracameral injection of dexamethasone-loaded poly lactic-co-glycolic acid microspheres (Dex-PLGA-Ms) over six months. METHODS Healthy rats received two injections (at baseline and Week 4) of Dex-PLGA-Ms into the anterior chamber of the right eye. Clinical signs and intraocular pressure (IOP) were weekly recorded. The structure of the retina and optic nerve was in vivo evaluated using optical coherence tomography (OCT) every two weeks and functionally using dark- and light-adapted electroretinography at 0-12-24 weeks. Histological studies were also performed. RESULTS IOP progressively increased up to hypertension (23.22 ± 3.63 mmHg) in both eyes but did so later in left eyes. OCT quantified a decrease in full-thickness retina posterior pole (R), retinal-nerve-fiber layer (RNFL), and ganglion-cell layer (GCL) thickness up to 24 weeks. Right eyes showed higher neuroretinal thickness loss up to week 8. RNFL experienced the highest percentage thickness loss at the inferior-superior axis, while in GCL the inner sectors of the horizontal axis (Nasal-Temporal) suffered the greatest decrease in thickness. Retinal ganglion cell, photoreceptor, and intermediate cell functionality decreased over time. Increased deposition of collagen IV was also found in zonular fibers and the ciliary body. CONCLUSIONS This work shows the usefulness of drug delivery systems, not to treat pathology but to induce it. Only two injections of Dex-PLGA-Ms in the anterior chamber of rat eyes were enough to progressively create ocular hypertension and subsequent functional and structural neuroretinal degeneration, at least over 6 months.
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Affiliation(s)
- M J Rodrigo
- Department of Ophthalmology, Miguel Servet University Hospital, Zaragoza, Spain.,Miguel Servet Ophthalmology Research Group (GIMSO), Aragon Health Research Institute (IIS Aragon), Zaragoza, Spain.,National Ocular Pathology Network (OFTARED), Carlos III Health Institute, Madrid, Spain
| | - D Garcia-Herranz
- Complutense University of Madrid. Innovation, Therapy and Pharmaceutical Development in Ophthalmology (InnOftal) Research Group, UCM 920415, Department of Pharmaceutics and Food Technology, Faculty of Pharmacy, Complutense University of Madrid, Spain.,Health Research Institute, San Carlos Clinical Hospital (IdISSC), Madrid, Spain
| | - A Aragón-Navas
- Complutense University of Madrid. Innovation, Therapy and Pharmaceutical Development in Ophthalmology (InnOftal) Research Group, UCM 920415, Department of Pharmaceutics and Food Technology, Faculty of Pharmacy, Complutense University of Madrid, Spain.,Health Research Institute, San Carlos Clinical Hospital (IdISSC), Madrid, Spain
| | - M Subias
- Department of Ophthalmology, Miguel Servet University Hospital, Zaragoza, Spain.,Miguel Servet Ophthalmology Research Group (GIMSO), Aragon Health Research Institute (IIS Aragon), Zaragoza, Spain
| | - T Martinez-Rincón
- Department of Ophthalmology, Miguel Servet University Hospital, Zaragoza, Spain.,Miguel Servet Ophthalmology Research Group (GIMSO), Aragon Health Research Institute (IIS Aragon), Zaragoza, Spain
| | - S Mendez-Martínez
- Department of Ophthalmology, Miguel Servet University Hospital, Zaragoza, Spain.,Miguel Servet Ophthalmology Research Group (GIMSO), University of Zaragoza, Aragon Health Research Institute (IIS Aragon), Zaragoza, Spain
| | - M J Cardiel
- Miguel Servet Ophthalmology Research Group (GIMSO), University of Zaragoza, Aragon Health Research Institute (IIS Aragon), Zaragoza, Spain.,Department of Pathology, Lozano Blesa University Hospital, Zaragoza, Spain
| | - J García-Feijoo
- Complutense University of Madrid. Innovation, Therapy and Pharmaceutical Development in Ophthalmology (InnOftal) Research Group, UCM 920415. National Ocular Pathology Network (OFTARED), Carlos III Health Institute, Spain.,Servicio de Oftalmología, Hospital Clínico San Carlos, Madrid, Spain.,Departamento de Inmunología, Oftalmología y ORL, Facultad de Medicina, Universidad Complutense de Madrid (UCM), IdISSC, Madrid, Spain
| | - J Ruberte
- Animal Biotechnology and Gene Therapy Centre (CBATEG), Universitat Autònoma de Barcelona, Bellaterra, Spain.,Networked Biomedical Research Centre for Diabetes and Associated Metabolic Diseases (CIBERDEM), Madrid, Spain.,Department of Animal Health and Anatomy, School of Veterinary Medicine, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - R Herrero-Vanrell
- National Ocular Pathology Network (OFTARED), Carlos III Health Institute, Madrid, Spain.,Complutense University of Madrid. Innovation, Therapy and Pharmaceutical Development in Ophthalmology (InnOftal) Research Group, UCM 920415, Department of Pharmaceutics and Food Technology, Faculty of Pharmacy, Complutense University of Madrid, Spain.,Health Research Institute, San Carlos Clinical Hospital (IdISSC), Madrid, Spain
| | - L Pablo
- Department of Ophthalmology, Miguel Servet University Hospital, Zaragoza, Spain.,National Ocular Pathology Network (OFTARED), Carlos III Health Institute, Madrid, Spain.,Miguel Servet Ophthalmology Research Group (GIMSO), University of Zaragoza, Aragon Health Research Institute (IIS Aragon), Zaragoza, Spain
| | - E Garcia-Martin
- Department of Ophthalmology, Miguel Servet University Hospital, Zaragoza, Spain.,National Ocular Pathology Network (OFTARED), Carlos III Health Institute, Madrid, Spain.,Miguel Servet Ophthalmology Research Group (GIMSO), University of Zaragoza, Aragon Health Research Institute (IIS Aragon), Zaragoza, Spain
| | - I Bravo-Osuna
- National Ocular Pathology Network (OFTARED), Carlos III Health Institute, Madrid, Spain.,Complutense University of Madrid. Innovation, Therapy and Pharmaceutical Development in Ophthalmology (InnOftal) Research Group, UCM 920415, Department of Pharmaceutics and Food Technology, Faculty of Pharmacy, Complutense University of Madrid, Spain.,Health Research Institute, San Carlos Clinical Hospital (IdISSC), Madrid, Spain
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Rodrigo MJ, Cardiel MJ, Fraile JM, Mendez-Martinez S, Martinez-Rincon T, Subias M, Polo V, Ruberte J, Ramirez T, Vispe E, Luna C, Mayoral JA, Garcia-Martin E. Brimonidine-LAPONITE® intravitreal formulation has an ocular hypotensive and neuroprotective effect throughout 6 months of follow-up in a glaucoma animal model. Biomater Sci 2020; 8:6246-6260. [PMID: 33016285 DOI: 10.1039/d0bm01013h] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Intravitreal administration is widely used in ophthalmological practice to maintain therapeutic drug levels near the neuroretina and because drug delivery systems are necessary to avoid reinjections and sight-threatening side effects. However, currently there is no intravitreal treatment for glaucoma. The brimonidine-LAPONITE® formulation was created with the aim of treating glaucoma for extended periods with a single intravitreal injection. Glaucoma was induced by producing ocular hypertension in two rat cohorts: [BRI-LAP] and [non-bri], with and without treatment, respectively. Eyes treated with brimonidine-LAPONITE® showed lower ocular pressure levels up to week 8 (p < 0.001), functional neuroprotection explored by scotopic and photopic negative response electroretinography (p = 0.042), and structural protection of the retina, retinal nerve fibre layer and ganglion cell layer (p = 0.038), especially on the superior-inferior axis explored by optical coherence tomography, which was corroborated by a higher retinal ganglion cell count (p = 0.040) using immunohistochemistry (Brn3a antibody) up to the end of the study (week 24). Furthermore, delayed neuroprotection was detected in the contralateral eye. Brimonidine was detected in treated rat eyes for up to 6 months. Brimonidine-LAPONITE® seems to be a potential sustained-delivery intravitreal drug for glaucoma treatment.
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Affiliation(s)
- M J Rodrigo
- Department of Ophthalmology, Miguel Servet University Hospital, Zaragoza, Spain.
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Córdoba Díaz de Laspra E, Calleja JL, Hernando E, Lahuerta L, Ceballos C, Cardiel MJ, del Río Marco F, Ferreira Montero V. Primary malignant fibrous histiocytoma of the jejunum: report of a case and review of subject. J R Coll Surg Edinb 1997; 42:355-8. [PMID: 9354075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
We report a new case of primary malignant fibrous histiocytoma of the jejunum. Malignant fibrous histiocytoma (MFH) occurs most commonly in the extremities and trunk, but rarely in visceral organs. However, only eight cases of primary tumours involving the small intestine, including the present, have been described. This case report documents the appearance of malignant fibrous histiocytoma as a primary lesion of the intestinal wall in a patient with a 2-month history of dyspepsia, weight loss and unspecific abdominal pain. The final diagnosis was based on the pathological report of the surgical specimen. Emphasis is placed on the clinical signs, radiological studies and pathological findings. The literature on MFH of the jejunum is also reviewed. Malignant fibrous histiocytoma is considered an aggressive tumour, and the treatment of choice is complete surgical excision. Adjuvant chemotherapy or radiation is recommended mainly in those patients in whom there is vascular or lymphatic infiltration.
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