RESUMO
OBJECTIVE: Graves' ophthalmopathy (GO) is an autoimmune disease that leads to ocular proptosis caused by fat accumulation and inflammation, and the main treatment is corticosteroid therapy. Retinoid acid receptor-alpha (RARα) seems to be associated with inflammation and adipocyte differentiation. This study aimed to assess the effect of glucocorticoid treatment on orbital fibroblasts of GO patient treated or not with different glucocorticoid doses. MATERIALS AND METHODS: Orbital fibroblasts collected during orbital decompression of a female patient with moderately severe/severe GO were cultivated and treated with 10 nM and 100 nM dexamethasone (Dex). rRARα gene expression in the treated and untreated cells was then compared. RESULTS: Fibroblast RARα expression was not affected by 100 nM Dex. On the other hand, RARα expression was 24% lower in cells treated with 10 nM Dex (p < 0.05). CONCLUSIONS: Orbital fibroblasts from a GO patient expressed the RARα gene, which was unaffected by higher, but decreased with lower doses of glucocorticoid.
Assuntos
Dexametasona/administração & dosagem , Fibroblastos/química , Expressão Gênica/efeitos dos fármacos , Glucocorticoides/administração & dosagem , Oftalmopatia de Graves/tratamento farmacológico , Órbita/efeitos dos fármacos , Receptor alfa de Ácido Retinoico/genética , Fibroblastos/efeitos dos fármacos , Oftalmopatia de Graves/patologia , Humanos , Órbita/patologia , Receptor alfa de Ácido Retinoico/efeitos dos fármacos , Índice de Gravidade de DoençaRESUMO
ABSTRACT Objective: Graves' ophthalmopathy (GO) is an autoimmune disease that leads to ocular proptosis caused by fat accumulation and inflammation, and the main treatment is corticosteroid therapy. Retinoid acid receptor-alpha (RARα) seems to be associated with inflammation and adipocyte differentiation. This study aimed to assess the effect of glucocorticoid treatment on orbital fibroblasts of GO patient treated or not with different glucocorticoid doses. Materials and methods: Orbital fibroblasts collected during orbital decompression of a female patient with moderately severe/severe GO were cultivated and treated with 10 nM and 100 nM dexamethasone (Dex). rRARα gene expression in the treated and untreated cells was then compared. Results: Fibroblast RARα expression was not affected by 100 nM Dex. On the other hand, RARα expression was 24% lower in cells treated with 10 nM Dex (p < 0.05). Conclusions: Orbital fibroblasts from a GO patient expressed the RARα gene, which was unaffected by higher, but decreased with lower doses of glucocorticoid.
Assuntos
Humanos , Órbita/efeitos dos fármacos , Dexametasona/administração & dosagem , Expressão Gênica/efeitos dos fármacos , Oftalmopatia de Graves/tratamento farmacológico , Fibroblastos/química , Glucocorticoides/administração & dosagem , Órbita/patologia , Índice de Gravidade de Doença , Oftalmopatia de Graves/patologia , Fibroblastos/efeitos dos fármacos , Receptor alfa de Ácido Retinoico/efeitos dos fármacos , Receptor alfa de Ácido Retinoico/genéticaRESUMO
RESUMO O bimatoprost é utilizado comumente como a droga de primeira escolha no tratamento do glaucoma primário de ângulo aberto. Hiperemia conjuntival, crescimento dos cílios, enoftalmia, escurecimento cutâneo periocular, sulco palpebral profundo e prurido ocular têm sido relatados em pacientes que receberam bimatoprost em doses únicas diárias durante cerca de 3 meses. O mecanismo exato para estes efeitos adversos permanece desconhecido. Objetivo: Verificar em animais de experimentação, as alterações do tecido conjuntivo orbitário após injeção retrobulbar de bimatoprost 0,03%. Métodos Foram utilizados trinta e seis ratos machos (Rattus norvegicus albinus) submetidos a diferentes períodos de injeção retrobulbar de bimatoprost à direita. O material exenterado foi submetido à análise histológica, morfométrica (diâmetro, densidade numérica e densidade de volume dos adipócitos) e imunohistoquímica para marcação do VEGF. Os resultados destas análises foram submetidos à análise descritiva com o auxílio do software R. O nível de significância adotado foi 5%. Para as comparações foi proposto o modelo de regressão linear com efeitos mistos. Resultados: Na amostra estudada, as órbitas submetidas a injeções retrobulbares de bimatoprost apresentaram ao redor do nervo óptico tecido conjuntivo mais espesso, com inúmeros capilares e vasos de vários calibres e a redução da quantidade, diâmetro e volume das células adiposas estatisticamente significativo quando comparado à órbita contralateral e ao grupo controle. Conclusão: Neste estudo observaram-se as seguintes alterações potencialmente reversíveis do tecido conjuntivo orbitário nos ratos submetidos à injeção retrobulbar de bimatoprost: 1) redução da quantidade, do diâmetro e do volume das células adiposas orbitárias; 2) neovascularização local; 3) espessamento e remodelamento das fibras de colágeno na cavidade orbitária.
ABSTRACT Bimatoprost is commonly used as the drug of first choice in the treatment of primary open-angle glaucoma. Conjunctival hyperemia, eyelash growth, enophthalmos, periocular skin pigmentation, deep lid sulcus and itching eyes have been reported in patients that daily received single dosages during a three month period. The exact mechanism for these adverse effects remains unknown. Objective: to verify alterations, in test animals, of the orbital connective tissue after peribulbar injections of bimatoprost 0.03% using histological and immune-histochemical analysis. Methods: thirty six male test rats (Rattus norvegicus albinus) were subjected to various periods of periocular injections of bimatoprost 0.03% in the right eye.All extracted material was submitted to histological, morphometric (diameter, numeric density and density of adipocyte volume) and immune-histochemical analysis to mark the vascular endothelial growth factor (VEGF). These analysis results were then submitted to a descriptive analysis with the help of R software. The significance level used was 5%. For comparison, the model of linear regression with mixed effects was proposed. Results: In the sample studied, the eye sockets that were continuously submitted to bimatoprost had a denser conjunctival tissue around the optic nerve, with numerous capillaries and blood vessels of various sizes and a reduction of quantity, diameter and volume of adipose cells of statistic importance when compared to the contralateral eye socked and the control group. Conclusion: In this study, the following potentially reversible changes of orbital connective tissue were observed in test rats subjected to periocular injection of bimatoprost: 1) reduction of quantity, diameter and volume of orbital adipose cells; 2) local neovascularization; 3) thickening and remodeling of collagen fibers in the orbital cavity.
Assuntos
Animais , Masculino , Órbita/efeitos dos fármacos , Tecido Conjuntivo/efeitos dos fármacos , Bimatoprost/farmacologia , Ratos , Ratos Wistar , Adipócitos/efeitos dos fármacos , Adipócitos/metabolismo , Injeções IntraocularesRESUMO
BACKGROUND AND OBJECTIVES: To compare the needle path during retrobulbar ophthalmic block with that during peribulbar ophthalmic block, its relation with anesthetic spread, and the quality of the anesthesia. METHODS: This is a prospective comparative study in selected candidates of ophthalmic blocks for phacoemulsification. The procedure used a 22-gauge 1 needle in a single lateral inferior transcutaneous puncture with 5 mL of anesthetic solution with radiological contrast. Patients were randomly divided into 2 groups: GI, retrobulbar block; GII, peribulbar block. Computed tomography scans of the orbit were performed at the time of the blockade and 10 minutes after anesthetic injection. The quality of anesthesia was assessed by measurement of ocular motility at 3, 5, and 10 minutes after the block. RESULTS: Twenty eyes per group were included. The needle path was intraconal in 10 cases in GI and in no patient in GII, transfixed the muscle cone in 5 cases in GI and in 4 in GII, and was extraconal in 2 cases in GI and in 13 in GII. The anesthetic dispersion was directly related to the needle path. In all extraconal cases, the block was unsatisfactory. It was satisfactory when the path of the needle was intraconal or the cone was transfixed (P = 1.0). The quality of anesthesia was higher in the retrobulbar block (P < 0.01). CONCLUSIONS: The path of the needle contributed to the orbital anesthetic solution dispersion and the quality of anesthesia. The retrobulbar block technique provided better-quality anesthesia compared with the peribulbar one.
Assuntos
Anestésicos Locais/administração & dosagem , Agulhas , Bloqueio Nervoso/instrumentação , Bloqueio Nervoso/métodos , Órbita/efeitos dos fármacos , Facoemulsificação/métodos , Administração Oftálmica , Idoso , Anestésicos Locais/farmacocinética , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Órbita/metabolismo , Estudos Prospectivos , Método Simples-CegoRESUMO
Objective: To evaluate in experimental animals the changes of the palpebral fissure and the orbital volume after orbital injection of bimatoprost 0.03%. Methods: Two main groups of Wistar rats were analyzed, one after orbital injection of bimatoprost 0.03% and another, a control group, after orbital injection of saline solution. The calculation of the palpebral fissure was done on images by means of computer processing, using the program Image J. After taking photographs, the animals were submitted to bilateral orbital exenteration and the volume was calculated in all the animals by the water displacement method (Archimedes’ Principle). Results: While comparing the measurements of the palpebral fissure and the orbital volume among animals given an injection with bimatoprost 0.03% and the control group it was found that there were no statistically significant differences. Conclusions: In this study there were no statistically significant differences in the measurement of the vertical palpebral fissure and the orbital volume among animals given the orbital injection of bimatoprost 0.03% and the animals of the control group. .
Objetivo: Avaliar em modelos experimentais as alterações da fenda palpebral e do volume orbitário após aplicação orbitária de bimatoprost 0,03%. Métodos: Dois principais grupos compostos por ratos Wistar foram analisados, sendo comparados os animais submetidos à injeção orbitária de bimatoprost 0.03% com os submetidos à injeção orbitária de solução salina. O cálculo da fenda palpebral vertical foi obtido através de imagem computadorizada utilizando-se o programa Image J. Após serem fotografados os animais foram submetidos à exenteração bilateral e o volume orbitário foi calculado pelo método de deslocamento da coluna de água (Princípio de Archimedes). Resultados: Quando foram comparadas as medidas da fenda palpebral vertical e do volume orbitário entre os animais submetidos a injeção de bimatoprost 0.03% e o grupo controle não foi obsevada diferença estatisticamente significante. Conclusão: Neste estudo não houve diferença estatisticamente significante nas medidas da fenda palpebral vertical e no volume orbitário entre os animais submetidos à injeção orbitária de bimatoprost 0.03% e o grupo controle. .
Assuntos
Animais , Masculino , Órbita/efeitos dos fármacos , Atrofia/induzido quimicamente , Tecido Adiposo/efeitos dos fármacos , Pálpebras/efeitos dos fármacos , Bimatoprost/efeitos adversos , Bimatoprost/farmacologia , Doenças Orbitárias/induzido quimicamente , Prostaglandinas F Sintéticas/administração & dosagem , Prostaglandinas F Sintéticas/efeitos adversos , Prostaglandinas F Sintéticas/farmacologia , Ratos , Ratos Wistar , Adipócitos/efeitos dos fármacos , Doenças Palpebrais/induzido quimicamente , Injeções IntraocularesRESUMO
PURPOSE: To describe the authors experience with calcium hydroxyl-apatite (CaHa) injections for the aesthetic correction of tear trough, infraorbital hollows, deep upper sulcus, dark circles and lower eyelid bags. METHODS: The records of 63 patients (127 eyelids) injected with CaHa for aesthetic rejuvenation of the periocular region between March 2012 and March 2013 were retrospectively evaluated. All injections were carried out using a 25-gauge cannula after adding 0.5 ml of 2% lidocaine to 1.5 ml vials of the original product. Postoperative visits were scheduled at 1 week and 1 month. Any previous treatment was recorded, and necessity of retreatments and side effects was evaluated. Patient satisfaction was recorded at 1 month with self-evaluation of the treatment result as "worsened," "unchanged," or "improved." Standard pre- and postinjection photographs were taken and compared to analyze the success of the procedure. Pictures were retrospectively graded by the authors on a similar improvement scale of 1 (worse), 2 (no change), and 3 (improvement). RESULTS: Fifty-eight/sixty-three patients were women (92%), with an average age of 42 years (range; 18-57 years). Chief complaints were "hollows" in 94% of patients, "dark circles" in 33%, lower eyelid "bags" in 17%, and deep upper sulcus in 4.7%. Twenty-three patients (36.5%) required an additional correction 1 month after the primary treatment. Satisfaction was as high as 98% among patients treated primarily for hollowness, and the overall satisfaction rate was 92%. Associated dark circles were satisfactorily treated in 68% of the patients. Temporary side effects involved mild erythema and swelling for 2 to 3 days and pseudoxanthalesma effect in 22 eyelids (17.4%) lasting <6 weeks. In 2 patients, erythema lasted longer than 4 weeks. The 2 worse complications in this series were migration of the product above the medial canthal tendon in 1 patient and overcorrection in another patient. These complications were all managed conservatively and resolved spontaneously within 6 to 8 weeks. No case of irregular contour, palpable lumpiness, or unevenness were encountered. In the end, only 1 patient thought she was worsened after the treatment. CONCLUSIONS: Treatment of the periocular region with CaHa injections is a safe and effective treatment with high patient satisfaction and low complication rate. Advanced technical skills may have to be acquired for the specific treatment of this area using this particulate material.
Assuntos
Materiais Biocompatíveis/administração & dosagem , Durapatita/administração & dosagem , Pálpebras/efeitos dos fármacos , Órbita/efeitos dos fármacos , Rejuvenescimento , Envelhecimento da Pele/efeitos dos fármacos , Dermatopatias/tratamento farmacológico , Adolescente , Adulto , Técnicas Cosméticas , Feminino , Humanos , Injeções Intradérmicas , Masculino , Pessoa de Meia-Idade , Satisfação do Paciente , Estudos Retrospectivos , Adulto JovemRESUMO
OBJETIVO: Avaliar se a carboximetilcelulose 6,0% é capaz de atuar como modificadora do sistema oculomotor de coelhos por meio de forças de ação viscoelástica, a durabilidade de seu eventual efeito e reações teciduais à aplicação. MÉTODOS: Foram utilizados 25 coelhos da raça Nova Zelândia, divididos em dois grupos experimentais: um tratado com injeção peribulbar de carboximetilcelulose (CMC) 6,0 por cento e um controle que foi submetido à injeção peribulbar de 3,0 cc de soro fisiológico. No grupo tratado com CMC, variou-se o volume total injetado, obtendo-se, assim, quatro subgrupos (1,0, 1,5, 2,0 e 3,0 cc). Foram realizadas medidas da força necessária para promover movimentos tangenciais de adução, avaliação clínica e medidas da pressão intraocular antes, imediatamente após a injeção da substância e no 7º, 30º e 60º dia pós-operatório. A eutanásia dos animais foi realizada no 60º dia pós-operatório para análise histológica dos tecidos perioculares. RESULTADOS: A força média encontrada, 60 dias após a injeção da CMC 6,0 por cento, foi menor no subgrupo tratado 1,0 e maior nos subgrupos tratados 1,5, 2,0 e 3,0 relativamente à força antes da injeção. Nos subgrupos em que houve aumento da força, a análise histológica revelou processo inflamatório do tipo histiocitário com formação de fibrose e a presença da CMC nos tecidos perioculares. CONCLUSÕES: A carboximetilcelulose 6,0 por cento atuou como modificadora do sistema oculomotor de coelhos, podendo facilitar ou dificultar movimentos. Não foi possível concluir se o aumento da força deveu-se apenas ao processo inflamatório ou à soma de inflamação com um possível atrito viscoso provocado pela CMC.
PURPOSE: To determine the effects of 6.0% carboxymethylcellulose (CMC) in modifying the oculomotor system of rabbits by means of viscoelastic action forces, the durability of this effect and possible inflamatory reaction. METHODS: Twenty-five New Zealand rabbits were divided into two experimental groups: one treated with a peribulbar injection of 6.0 percent CMC and a control group submitted to peribulbar injection of 3.0 cc of physiological saline. The group submitted to peribulbar CMC injection was divided into four subgroups respectively receiving the following volumes: 1.0, 1.5, 2.0 and 3.0 cc. The force needed to promote tangential adduction dislocations, external ophthalmologic signs and intraocular pressure were evaluated. The animals were sacrificed on the 60th day after the injection for histological analysis. RESULTS: The mean force detected 60 days after the injection of 6.0 percent CMC was lower in the 1.0 treated subgroup and higher in the 1.5, 2.0 and 3.0 treated subgroups relative to the force before injection. Histological analysis revealed histiocytic infiltration with fibrosis in the subgroups in which there was an increase in force and the presence of CMC in periocular tissues. CONCLUSIONS: 6.0 percent CMC acted as a modifier of the oculomotor system of rabbits, facilitating or impairing movements. It was not possible to conclude whether the increase in force occurred as a consequence of the inflammatory process alone or of the sum of inflammation and a possible viscous attrition provoked by CMC.
Assuntos
Animais , Feminino , Coelhos , Carboximetilcelulose Sódica/administração & dosagem , Músculos Oculomotores/efeitos dos fármacos , Órbita/efeitos dos fármacos , Carboximetilcelulose Sódica/efeitos adversos , Técnicas de Imagem por Elasticidade/métodos , Histiócitos/patologia , Modelos Animais , Músculos Oculomotores/patologia , Músculos Oculomotores/fisiologia , Miosite Orbital/etiologia , Miosite Orbital/patologia , Miosite Orbital/fisiopatologiaRESUMO
PURPOSE: To determine the effects of 6.0% carboxymethylcellulose (CMC) in modifying the oculomotor system of rabbits by means of viscoelastic action forces, the durability of this effect and possible inflammatory reaction. METHODS: Twenty-five New Zealand rabbits were divided into two experimental groups: one treated with a peribulbar injection of 6.0% CMC and a control group submitted to peribulbar injection of 3.0 cc of physiological saline. The group submitted to peribulbar CMC injection was divided into four subgroups respectively receiving the following volumes: 1.0, 1.5, 2.0 and 3.0 cc. The force needed to promote tangential adduction dislocations, external ophthalmologic signs and intraocular pressure were evaluated. The animals were sacrificed on the 60th day after the injection for histological analysis. RESULTS: The mean force detected 60 days after the injection of 6.0% CMC was lower in the 1.0 treated subgroup and higher in the 1.5, 2.0 and 3.0 treated subgroups relative to the force before injection. Histological analysis revealed histiocytic infiltration with fibrosis in the subgroups in which there was an increase in force and the presence of CMC in periocular tissues. CONCLUSIONS: 6.0% CMC acted as a modifier of the oculomotor system of rabbits, facilitating or impairing movements. It was not possible to conclude whether the increase in force occurred as a consequence of the inflammatory process alone or of the sum of inflammation and a possible viscous attrition provoked by CMC.
Assuntos
Carboximetilcelulose Sódica/administração & dosagem , Músculos Oculomotores/efeitos dos fármacos , Órbita/efeitos dos fármacos , Animais , Carboximetilcelulose Sódica/efeitos adversos , Técnicas de Imagem por Elasticidade/métodos , Feminino , Histiócitos/patologia , Modelos Animais , Músculos Oculomotores/patologia , Músculos Oculomotores/fisiologia , Miosite Orbital/etiologia , Miosite Orbital/patologia , Miosite Orbital/fisiopatologia , CoelhosRESUMO
PURPOSE: To evaluate the use of orbital polyacrylamide gel injection for the correction of anophthalmic enophthalmos. METHODS: Noncontrolled clinical trial of 21 patients (14 with ocular implants, 5 with phthisis bulbi, and 2 with dermis-fat graft). Orbital CT was performed to estimate the volume of polyacrylamide gel needed to restore orbital volume. Polyacrylamide gel was injected using a 22-gauge (30 x 0.7 mm) needle transcutaneously inserted in the lateral third of the lower eyelid, directed to the orbital muscle cone. A second injection was administered 15 days later, if necessary. CT was repeated 30 days after the last procedure. Exophthalmometry was performed before and 90 days after the procedure. RESULTS: The mean total volume injected per orbit was 2.4 +/- 0.7 ml (range, 1-3.5 ml). The volume of the enophthalmic orbit increased from 26.9 +/- 5.0 ml to 29.3 +/- 4.9 ml (p < 0.001). The mean difference in exophthalmometry readings was 3.3 +/- 1.6 mm (range, 1.5-8.0 mm) before the procedure and 1.0 +/- 0.9 mm (range, 0.0-3.0 mm) after 3 months (p < 0.001). Adjustment of the ocular prosthesis or fabrication of a new one was necessary in 11 patients (52.4%), and the mean volume of the ocular prosthesis was reduced from 2.0 +/- 0.6 ml to 1.6 +/- 0.6 ml (p = 0.003). All patients were satisfied with the aesthetic results. No serious adverse events were observed. The initial results were maintained 1 year after the procedure. CONCLUSIONS: Polyacrylamide gel injection in the orbital space effectively reduces enophthalmos in ocular prosthesis wearers.
Assuntos
Resinas Acrílicas/administração & dosagem , Anoftalmia/terapia , Enoftalmia/terapia , Órbita/efeitos dos fármacos , Tecido Adiposo/transplante , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Enucleação Ocular , Evisceração do Olho , Olho Artificial , Feminino , Géis/administração & dosagem , Humanos , Injeções , Masculino , Pessoa de Meia-Idade , Órbita/diagnóstico por imagem , Implantes Orbitários , Estudos Prospectivos , Tomografia Computadorizada por Raios XRESUMO
Rhino-orbital-cerebral mucormycosis is a disease that is frequently fatal. A 39-year-old man with diabetic ketoacidosis was referred to the authors' ophthalmic service with fever, orbital apex syndrome in the right eye, lethargy, and a black eschar in the palate. He was treated with systemic and local (intraconal) amphotericin B and his ketoacidosis was controlled; exenteration was not performed. Biopsy of the palate proved mucormycosis. Eighteen months later the patient was still alive and had a blind, anatomically preserved right eye with ptosis and intact extraocular muscle function without proptosis or pain. The authors propose this alternative means of treatment to achieve higher doses of the drug at the site of infection and better cosmetic and psychological results.