AIM:To determine the prevalence of some retinal pathologies in people over 60y and their association with demographic and ocular factors.METHODS:A cross-sectional study was conducted in Tehran using multistage cluster...AIM:To determine the prevalence of some retinal pathologies in people over 60y and their association with demographic and ocular factors.METHODS:A cross-sectional study was conducted in Tehran using multistage cluster sampling.After selecting subjects aged 60 and over,optometric,and ophthalmic examinations were done.For retinal examination,a 90 D lens was used and indirect ophthalmoscopy was performed after instilling tropicamide drops.Biometry was done using the IOL Master for all participants.RESULTS:Of 3791 people that were invited through cluster sampling,3310 participated in the study(response rate=82%).The prevalence of retinal pigmented epithelium(RPE)change,drusen,geographic atrophy(GA),hypertensive retinopathy(HTR),nonproliferative diabetic retinopathy(NPDR),proliferative diabetic retinopathy(PDR),choroidal neovascularization(CNV),central retinal artery occlusion(CRAO),myopic retinopathy(MR),branch retinal vein occlusion(BRVO),and central retinal vein occlusion(CRVO)was 27.42%,11.08%,4.52%,3.03%,4.05%,0.54%,0.82%,0.39%,0.20%,0.49%,and 0.19%,respectively.After removing the effect of age,the odds of NPDR were 1.68 times higher in women compared to men(P=0.014).After removing the effect of sex,the odds of drusen,RPE change,GA,CNV,BRVO,and CRVO increased with age.CONCLUSION:There is a higher prevalence of RPE change,drusen,GA,CNV and a lower prevalence of MR and CRAO in the elderly population of Tehran aged over 60y compared to global average values.Considering the correlation of most of the diseases with age and their effects on vision,attention should be paid to these diseases and the related screening programs to prevent vision impairment.展开更多
Retinal angiogenesis is a critical process for normal retinal function.However,uncontrolled angiogenesis can lead to pathological neovascularization(NV),which is closely related to most irreversible blindness-causing ...Retinal angiogenesis is a critical process for normal retinal function.However,uncontrolled angiogenesis can lead to pathological neovascularization(NV),which is closely related to most irreversible blindness-causing retinal diseases.Understanding the molecular basis behind pathological NV is important for the treatment of related diseases.Twist-related protein 1(TWIST1)is a well-known transcription factor and principal inducer of epithelial-mesenchymal transition(EMT)in many human cancers.Our previous study showed that Twist1 expression is elevated in pathological retinal NV.To date,however,the role of TWIST1 in retinal pathological angiogenesis remains to be elucidated.To study the role of TWIST1 in pathological retinal NV and identify specific molecular targets for antagonizing pathological NV,we generated an inducible vascular endothelial cell(EC)-specific Twist1 transgenic mouse model(Tg-Twist1iEC+).Whole-mount retinas from Tg-Twist1iEC+mice showed retarded vascular progression and increased vascular density in the front end of the growing retinal vasculature,as well as aneurysm-like pathological retinal NV.Furthermore,overexpression of Twist1 in the ECs promoted cell proliferation but disturbed cell polarity,thus leading to uncontrolled retinal angiogenesis.TWIST1 promoted pathological NV by activating the Wnt/β-catenin signaling pathway and inducing the expression of NV formation-related genes,thereby acting as a‘valve’in the regulation of pathological angiogenesis.This study identified the critical role of TWIST1 in retinal pathological NV,thus providing a potential therapeutic target for pathological NV.展开更多
Purpose: To Study the clinical, pathological, ultrastructural and immunohistchemicalcharacters of adenoma of the retinal pigment epithelium in order to offer evidence todiagnose this tumor.Methods: Routine paraffin sl...Purpose: To Study the clinical, pathological, ultrastructural and immunohistchemicalcharacters of adenoma of the retinal pigment epithelium in order to offer evidence todiagnose this tumor.Methods: Routine paraffin slices HE stain, histochemistry PAS and VG stain,transmission electron microscopy, and immunohistochemistry for S-100 and vimentinwith LSAB method were used.Results: The tumor cells were oval and cuboidal in shape. Part of the tumor had atubular arrangement. Around the sheets of tumors cells there was a large amount ofuniform red stick-like substances. The above matter represented positive in PAS stain.Most of the above matter was yellow, while less of the matter showed red in VG stain.Transmission electron microscopy showed that there were tight junctions between tumorcells. Immunohistochemistry showed positive for S-100, negative for vimentin.Conclusions: The ultrastructural and immunohistochemical characters of the adenoma ofretinal pigment epithelium are consistent with the retinal pigment epithelium.展开更多
Stickler syndrome (SS) is an autosomal dominant inherited genetic disorder that presents with hearing loss, a cleft palate, epiphyseal dysplasia, and degeneration, similar to arthritis and well known to be associated ...Stickler syndrome (SS) is an autosomal dominant inherited genetic disorder that presents with hearing loss, a cleft palate, epiphyseal dysplasia, and degeneration, similar to arthritis and well known to be associated with rhegmato-genous retinal detachments. A particular group of physical features called Pierre Robin sequence is also common in people with stickler syndrome. Pierre Robin sequence includes a cleft palate, glossoptosis, and micrognathia. We describe a case report of a family diagnosed with stickler syndrome presenting with Pierre Robin sequence and share some universal management steps for rhegmatogenous retinal detachment in stickler syndrome. Genetic testing is important to support the diagnosis and conduct screenings of family members.展开更多
Dear Editor,Despite substantial advances in neonatal medicine, retinopathy of prematurity (ROP) continues to be a serious therapeutic challenge⑴.Visual acuity loss in patients with ROP has been associated with struct...Dear Editor,Despite substantial advances in neonatal medicine, retinopathy of prematurity (ROP) continues to be a serious therapeutic challenge⑴.Visual acuity loss in patients with ROP has been associated with structural retinal abnormalities (including retinal detachment, retinal folds, and pigmentary retinopathy), cataract, glaucoma, and amblyopia due to refractive error or strabismus[2].展开更多
基金Supported by National Institute for Medical Research Development(NIMAD)Affiliated with the Iranian Ministry of Health and Medical Education(No.963660).
文摘AIM:To determine the prevalence of some retinal pathologies in people over 60y and their association with demographic and ocular factors.METHODS:A cross-sectional study was conducted in Tehran using multistage cluster sampling.After selecting subjects aged 60 and over,optometric,and ophthalmic examinations were done.For retinal examination,a 90 D lens was used and indirect ophthalmoscopy was performed after instilling tropicamide drops.Biometry was done using the IOL Master for all participants.RESULTS:Of 3791 people that were invited through cluster sampling,3310 participated in the study(response rate=82%).The prevalence of retinal pigmented epithelium(RPE)change,drusen,geographic atrophy(GA),hypertensive retinopathy(HTR),nonproliferative diabetic retinopathy(NPDR),proliferative diabetic retinopathy(PDR),choroidal neovascularization(CNV),central retinal artery occlusion(CRAO),myopic retinopathy(MR),branch retinal vein occlusion(BRVO),and central retinal vein occlusion(CRVO)was 27.42%,11.08%,4.52%,3.03%,4.05%,0.54%,0.82%,0.39%,0.20%,0.49%,and 0.19%,respectively.After removing the effect of age,the odds of NPDR were 1.68 times higher in women compared to men(P=0.014).After removing the effect of sex,the odds of drusen,RPE change,GA,CNV,BRVO,and CRVO increased with age.CONCLUSION:There is a higher prevalence of RPE change,drusen,GA,CNV and a lower prevalence of MR and CRAO in the elderly population of Tehran aged over 60y compared to global average values.Considering the correlation of most of the diseases with age and their effects on vision,attention should be paid to these diseases and the related screening programs to prevent vision impairment.
基金supported by the National Natural Science Foundation of China(82071009,81700841)the Grant from Chinese Academy of Medical Sciences(2019-I2M-5-032)。
文摘Retinal angiogenesis is a critical process for normal retinal function.However,uncontrolled angiogenesis can lead to pathological neovascularization(NV),which is closely related to most irreversible blindness-causing retinal diseases.Understanding the molecular basis behind pathological NV is important for the treatment of related diseases.Twist-related protein 1(TWIST1)is a well-known transcription factor and principal inducer of epithelial-mesenchymal transition(EMT)in many human cancers.Our previous study showed that Twist1 expression is elevated in pathological retinal NV.To date,however,the role of TWIST1 in retinal pathological angiogenesis remains to be elucidated.To study the role of TWIST1 in pathological retinal NV and identify specific molecular targets for antagonizing pathological NV,we generated an inducible vascular endothelial cell(EC)-specific Twist1 transgenic mouse model(Tg-Twist1iEC+).Whole-mount retinas from Tg-Twist1iEC+mice showed retarded vascular progression and increased vascular density in the front end of the growing retinal vasculature,as well as aneurysm-like pathological retinal NV.Furthermore,overexpression of Twist1 in the ECs promoted cell proliferation but disturbed cell polarity,thus leading to uncontrolled retinal angiogenesis.TWIST1 promoted pathological NV by activating the Wnt/β-catenin signaling pathway and inducing the expression of NV formation-related genes,thereby acting as a‘valve’in the regulation of pathological angiogenesis.This study identified the critical role of TWIST1 in retinal pathological NV,thus providing a potential therapeutic target for pathological NV.
文摘Purpose: To Study the clinical, pathological, ultrastructural and immunohistchemicalcharacters of adenoma of the retinal pigment epithelium in order to offer evidence todiagnose this tumor.Methods: Routine paraffin slices HE stain, histochemistry PAS and VG stain,transmission electron microscopy, and immunohistochemistry for S-100 and vimentinwith LSAB method were used.Results: The tumor cells were oval and cuboidal in shape. Part of the tumor had atubular arrangement. Around the sheets of tumors cells there was a large amount ofuniform red stick-like substances. The above matter represented positive in PAS stain.Most of the above matter was yellow, while less of the matter showed red in VG stain.Transmission electron microscopy showed that there were tight junctions between tumorcells. Immunohistochemistry showed positive for S-100, negative for vimentin.Conclusions: The ultrastructural and immunohistochemical characters of the adenoma ofretinal pigment epithelium are consistent with the retinal pigment epithelium.
文摘Stickler syndrome (SS) is an autosomal dominant inherited genetic disorder that presents with hearing loss, a cleft palate, epiphyseal dysplasia, and degeneration, similar to arthritis and well known to be associated with rhegmato-genous retinal detachments. A particular group of physical features called Pierre Robin sequence is also common in people with stickler syndrome. Pierre Robin sequence includes a cleft palate, glossoptosis, and micrognathia. We describe a case report of a family diagnosed with stickler syndrome presenting with Pierre Robin sequence and share some universal management steps for rhegmatogenous retinal detachment in stickler syndrome. Genetic testing is important to support the diagnosis and conduct screenings of family members.
基金Supported in part by the National Institute of Health,Bethesda,Maryland(Grant P30-EY014801)an unrestricted grant to the University of Miami from Research to Prevent Blindness,New York,New York,USA
文摘Dear Editor,Despite substantial advances in neonatal medicine, retinopathy of prematurity (ROP) continues to be a serious therapeutic challenge⑴.Visual acuity loss in patients with ROP has been associated with structural retinal abnormalities (including retinal detachment, retinal folds, and pigmentary retinopathy), cataract, glaucoma, and amblyopia due to refractive error or strabismus[2].
