Production and Easy One-Step Purification of Bluetongue Recombinant VP7 from Infected Sf9 Supernatant for an Immunoenzymatic Assay (ELISA).

Bluetongue (BT) is non-contagious, vector-borne viral disease of domestic and wild ruminants, transmitted by midges (Culicoides spp.) and is caused by Bluetongue virus (BTV). BTV is the type species of the Orbivirus genus within the Reoviridae family and possesses a genome consisting of 10 double-stranded RNA segments encoding 7 structural and 4 nonstructural proteins. Viral Protein 7 (VP7) is the major sera group-specific protein and is a good antigen candidate for immunoenzymatic assays for the BT diagnosis. In our work, BTV-2 recombinant VP7 (BTV-2 recVP7), expressed in Spodoptera frugiperda (Sf9) cells using a baculovirus system, was produced and purified by affinity chromatography from the supernatant of infected cell culture. The use of the supernatant allowed us to obtain a high quantity of recombinant protein with high purity level by an easy one-step procedure, rather than the multistep purification from the pellet. RecVP7-BTV2 was detected using a MAb anti-BTV in Western blot and it was used to develop an immunoenzymatic assay.

Telangiectasias maculares idiopáticas de tipo 2: prevalencia en nuestra área y estudio morfométrico y fenotípico / Idiopathic macular telangiectasia type 2: Prevalence and a morphometric and phenotypic study

Objetivo: Las telangiectasias maculares idiopáticas de tipo 2 (MacTel 2) son una enfermedad retiniana poco frecuente y aún no completamente caracterizada. El objetivo del presente trabajo es describir las características clínicas en imagen multimodal de la retina, presentar los resultados funcionales y estimar la prevalencia de la enfermedad en nuestro medio. Métodos: Estudio retrospectivo en el que se analizaron 12 ojos de 6 pacientes con MacTel 2. Se realizaron fotografías en color de fondo, autofluorescencia, angiografía fluoresceínica, tomografía de coherencia óptica (OCT) y angiografía por OCT y se analizaron posteriormente. Se registró prospectivamente la agudeza visual. La prevalencia se estableció en base en los pacientes referidos a una unidad especializada en enfermedades maculares. El período mínimo de seguimiento fue de 18 meses. Resultados: La prevalencia de MacTel2 en nuestro medio fue de 0,12%. Se presentaron las características clínicas en imagen multimodal de la retina. La agudeza visual permaneció estable durante el seguimiento (p = 0,492). Tres pacientes desarrollaron neovascularización coroidea (NVC), requiriendo tratamiento intravítreo con agentes antiangiogénicos. Conclusiones: La prevalencia de la enfermedad en nuestro medio es del 0,12%. El estudio mediante imágenes multimodales permite un diagnóstico y seguimiento de esta patología más preciso. La agudeza visual se mantuvo durante los 18 meses de seguimiento. Los pacientes que desarrollan NVC y son tratados con agentes antiangiogénicos parecen responder adecuadamente a ellos. Se necesitan más estudios para establecer estas conclusiones (AU)

Objective: Type 2 idiopathic macular telangiectasia (MacTel2) is a rare retinal disease that has still not been well-defined. The aim of the present manuscript is to describe the clinical features by multimodal retinal imaging, to present the functional characteristics, and to estimate the prevalence of the disease. Methods: A retrospective study was conducted on the 12 eyes of 6 patients with MacTel2. Fundus colour photographs, fundus autofluorescence, fluorescein angiography, optical coherence tomography (OCT), and OCT-angiography were performed and subsequently analysed. Visual acuity (VA) was prospectively recorded. The prevalence was established based on the patients referred to a specialised macular diseases unit. Minimum follow-up period was 18 months. Results: Prevalence of MacTel 2 in our study was 0.12%. Clinical features were presented using multimodal retinal imaging. VA remained stable during follow-up. Three patients developed choroidal neovascularisation (CNV), requiring intravitreal treatment with antiangiogenic agents. Conclusions: The prevalence of the disease found was 0.12%. The study using multimodal imaging allows a more accurate diagnosis and follow-up of this pathology. The VA is maintained during the 18-month follow-up (P = .492). Patients who develop CNV and are treated with antiangiogenic agents appear to respond adequately to them. More studies are needed to establish these conclusions (AU)

Idiopathic macular telangiectasia type 2: Prevalence and a morphometric and phenotypic study. / Telangiectasias maculares idiopáticas de tipo 2: prevalencia en nuestra área y estudio morfométrico y fenotípico.

OBJECTIVE: Type 2 idiopathic macular telangiectasia (MacTel2) is a rare retinal disease that has still not been well-defined. The aim of the present manuscript is to describe the clinical features by multimodal retinal imaging, to present the functional characteristics, and to estimate the prevalence of the disease. METHODS: A retrospective study was conducted on the 12 eyes of 6 patients with MacTel2. Fundus colour photographs, fundus autofluorescence, fluorescein angiography, optical coherence tomography (OCT), and OCT-angiography were performed and subsequently analysed. Visual acuity (VA) was prospectively recorded. The prevalence was established based on the patients referred to a specialised macular diseases unit. Minimum follow-up period was 18 months. RESULTS: Prevalence of MacTel 2 in our study was 0.12%. Clinical features were presented using multimodal retinal imaging. VA remained stable during follow-up. Three patients developed choroidal neovascularisation (CNV), requiring intravitreal treatment with antiangiogenic agents. CONCLUSIONS: The prevalence of the disease found was 0.12%. The study using multimodal imaging allows a more accurate diagnosis and follow-up of this pathology. The VA is maintained during the 18-month follow-up (P=.492). Patients who develop CNV and are treated with antiangiogenic agents appear to respond adequately to them. More studies are needed to establish these conclusions.

Jugando con la futura visión. Neovascularización coroidea por puntero láser / Playing with future sight. Choroidal neovascularisation due to hand-held laser pointers

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