Leber＇s congenital amaurosis（LCA）and recent gene therapy advancement for treating inherited retinopathies were extensive literature reviewed using MEDLINE,Pub Med and EMBASE. Adeno-associated viral vectors were the...Leber＇s congenital amaurosis（LCA）and recent gene therapy advancement for treating inherited retinopathies were extensive literature reviewed using MEDLINE,Pub Med and EMBASE. Adeno-associated viral vectors were the most utilised vectors for ocular gene therapy. Cone photoreceptor cells might use an alternate pathway which was not reliant of the retinal pigment epithelium（RPE）derived retinoid isomerohydrolase（RPE65）to access the 11-cis retinal dehydechromophore. Research efforts dedicated on the progression of a gene-based therapy for the treatment of LCA2. Such gene therapy approaches were extremely successful in canine,porcine and rodent LCA2 models. The recombinant AAV2.h RPE65v2 adenoassociated vector contained the RPE65 cDNA and was replication deficient. Its in vitro injection in target cells induced RPE65 protein production. The gene therapy trials that were so far conducted for inherited retinopathies have generated promising results. Phase I clinical trials to cure LCA and choroideremia demonstrated that adeno-associated viral vectors containing RPE genes and photoreceptors respectively,could be successfully administered to inherited retinopathy patients. A phase III trial is presently ongoing and if successful,it will lead the way to additional gene therapy attempts to cure monogenic,inherited retinopathies.展开更多
Dear Editor,We are Dr. Zhi-Qing Li and Dr. Jin Yang, from the Neuro-ophthalmology and Medical Retinal Department of Tianjin Medical University Eye Hospital, Tianjin, China. We here present two cases of X-linked inheri...Dear Editor,We are Dr. Zhi-Qing Li and Dr. Jin Yang, from the Neuro-ophthalmology and Medical Retinal Department of Tianjin Medical University Eye Hospital, Tianjin, China. We here present two cases of X-linked inheritable retinal diseases with genetic confirmation of the multimodal imaging findings of the patients, especially the female carriers. This study was approved by the institutional review board of Tianjin Medical University Eye Hospital, and the protocols adhered to the tenets of the Declaration of Helsinki. This letter mainly describes a novel imaging modality, multispectral imaging （MSI）, which appeared to be sensitive in detecting the pattern of chorioretinal degeneration and the tapetal-like reflex.展开更多
目的分析无脉络膜症患者的基因变异,明确其可能的致病原因,为临床诊断和遗传咨询提供依据。方法收集3个家系患者的临床表型资料,采集患者及家系受试者外周血提取基因组DNA。应用全外显子组靶向测序筛查可疑基因变异,对候选变异进一步通...目的分析无脉络膜症患者的基因变异,明确其可能的致病原因,为临床诊断和遗传咨询提供依据。方法收集3个家系患者的临床表型资料,采集患者及家系受试者外周血提取基因组DNA。应用全外显子组靶向测序筛查可疑基因变异,对候选变异进一步通过Sanger测序及定量PCR法验证并调查家系其他成员变异携带情况。通过HGMD和PubMed数据库检索基因变异的致病性报道情况,依据根据美国医学遗传学与基因组学学会(American College of Medical Genetics and Genomics,ACMG)变异指南判断候选变异的致病性。结果3个家系均检测到CHM基因致病变异,家系1先证者(Ⅱ1)为c.1584_1587del(p.Val529Hisfs*6)变异半合子,其女儿(Ⅲ_(2))携带c.1584_1587del(p.Val529Hisfs*6)杂合变异;家系2先证者(Ⅱ2)为第10至15外显子缺失(E10-15del)半合子,其母亲(Ⅰ2)和妹妹(Ⅱ3)携带E10-15del杂合变异;家系3先证者(Ⅱ2)为c.544delT(p.Cys182Valfs*14)变异半合子,母亲携带c.544delT(p.Cys182Valfs*14)杂合变异,父亲未检测到该变异。其中2个为已知致病性变异、1个为本研究发现的新变异CHM基因c.544delT(p.C182Vfs*14)。CHM基因c.544delT移码变异可导致翻译过程提前终止、产生无功能的产物蛋白,为致病性变异。结论本研究的发现扩展了无脉络膜症的基因变异谱。展开更多
文摘Leber＇s congenital amaurosis（LCA）and recent gene therapy advancement for treating inherited retinopathies were extensive literature reviewed using MEDLINE,Pub Med and EMBASE. Adeno-associated viral vectors were the most utilised vectors for ocular gene therapy. Cone photoreceptor cells might use an alternate pathway which was not reliant of the retinal pigment epithelium（RPE）derived retinoid isomerohydrolase（RPE65）to access the 11-cis retinal dehydechromophore. Research efforts dedicated on the progression of a gene-based therapy for the treatment of LCA2. Such gene therapy approaches were extremely successful in canine,porcine and rodent LCA2 models. The recombinant AAV2.h RPE65v2 adenoassociated vector contained the RPE65 cDNA and was replication deficient. Its in vitro injection in target cells induced RPE65 protein production. The gene therapy trials that were so far conducted for inherited retinopathies have generated promising results. Phase I clinical trials to cure LCA and choroideremia demonstrated that adeno-associated viral vectors containing RPE genes and photoreceptors respectively,could be successfully administered to inherited retinopathy patients. A phase III trial is presently ongoing and if successful,it will lead the way to additional gene therapy attempts to cure monogenic,inherited retinopathies.
基金Supported by National Natural Science Foundation of China(No.81670875No.81400412)+3 种基金Natural Science Foundation of Tianjin City(No.17JCYBJC27200 No.18JCQNJC10700No.15JCZDJC34500)the Dr. Henry Norman Bethune LangMu Young Scientist Scholarship(BJLM2015008L)
文摘Dear Editor,We are Dr. Zhi-Qing Li and Dr. Jin Yang, from the Neuro-ophthalmology and Medical Retinal Department of Tianjin Medical University Eye Hospital, Tianjin, China. We here present two cases of X-linked inheritable retinal diseases with genetic confirmation of the multimodal imaging findings of the patients, especially the female carriers. This study was approved by the institutional review board of Tianjin Medical University Eye Hospital, and the protocols adhered to the tenets of the Declaration of Helsinki. This letter mainly describes a novel imaging modality, multispectral imaging （MSI）, which appeared to be sensitive in detecting the pattern of chorioretinal degeneration and the tapetal-like reflex.
文摘目的分析无脉络膜症患者的基因变异,明确其可能的致病原因,为临床诊断和遗传咨询提供依据。方法收集3个家系患者的临床表型资料,采集患者及家系受试者外周血提取基因组DNA。应用全外显子组靶向测序筛查可疑基因变异,对候选变异进一步通过Sanger测序及定量PCR法验证并调查家系其他成员变异携带情况。通过HGMD和PubMed数据库检索基因变异的致病性报道情况,依据根据美国医学遗传学与基因组学学会(American College of Medical Genetics and Genomics,ACMG)变异指南判断候选变异的致病性。结果3个家系均检测到CHM基因致病变异,家系1先证者(Ⅱ1)为c.1584_1587del(p.Val529Hisfs*6)变异半合子,其女儿(Ⅲ_(2))携带c.1584_1587del(p.Val529Hisfs*6)杂合变异;家系2先证者(Ⅱ2)为第10至15外显子缺失(E10-15del)半合子,其母亲(Ⅰ2)和妹妹(Ⅱ3)携带E10-15del杂合变异;家系3先证者(Ⅱ2)为c.544delT(p.Cys182Valfs*14)变异半合子,母亲携带c.544delT(p.Cys182Valfs*14)杂合变异,父亲未检测到该变异。其中2个为已知致病性变异、1个为本研究发现的新变异CHM基因c.544delT(p.C182Vfs*14)。CHM基因c.544delT移码变异可导致翻译过程提前终止、产生无功能的产物蛋白,为致病性变异。结论本研究的发现扩展了无脉络膜症的基因变异谱。
