scholarly journals C1q enhances cone photoreceptor survival in a mouse model of autosomal recessive retinitis pigmentosa

2011 ◽  
Vol 20 (1) ◽  
pp. 64-68 ◽  
Author(s):  
Marian M Humphries ◽  
Paul F Kenna ◽  
Matthew Campbell ◽  
Lawrence C S Tam ◽  
Anh T H Nguyen ◽  
...  
Keyword(s):  
Mouse Model ◽  
Retinitis Pigmentosa ◽  
Autosomal Recessive ◽  
Cone Photoreceptor

scholarly journals Targeting of the NRL Pathway as a Therapeutic Strategy to Treat Retinitis Pigmentosa

2020 ◽  
Vol 9 (7) ◽  
pp. 2224 ◽  
Author(s):  
Spencer M. Moore ◽  
Dorota Skowronska-Krawczyk ◽  
Daniel L. Chao
Keyword(s):  
Retinitis Pigmentosa ◽  
Autosomal Recessive ◽  
Therapeutic Strategy ◽  
Leucine Zipper ◽  
Retinal Dystrophy ◽  
Rod Photoreceptor ◽  
Cone Photoreceptor ◽  
Future Directions ◽  
Inherited Retinal Dystrophy ◽  
Visual Acuity Loss

Retinitis pigmentosa (RP) is an inherited retinal dystrophy (IRD) with a prevalence of 1:4000, characterized by initial rod photoreceptor loss and subsequent cone photoreceptor loss with accompanying nyctalopia, visual field deficits, and visual acuity loss. A diversity of causative mutations have been described with autosomal dominant, autosomal recessive, and X-linked inheritance and sporadic mutations. The diversity of mutations makes gene therapy challenging, highlighting the need for mutation-agnostic treatments. Neural leucine zipper (NRL) and NR2E3 are factors important for rod photoreceptor cell differentiation and homeostasis. Germline mutations in NRL or NR2E3 leads to a loss of rods and an increased number of cones with short wavelength opsin in both rodents and humans. Multiple groups have demonstrated that inhibition of NRL or NR2E3 activity in the mature retina could endow rods with certain properties of cones, which prevents cell death in multiple rodent RP models with diverse mutations. In this review, we summarize the literature on NRL and NR2E3, therapeutic strategies of NRL/NR2E3 modulation in preclinical RP models, as well as future directions of research. In summary, inhibition of the NRL/NR2E3 pathway represents an intriguing mutation agnostic and disease-modifying target for the treatment of RP.

Melatonin delays photoreceptor degeneration in a mouse model of autosomal recessive retinitis pigmentosa

2017 ◽  
Vol 63 (3) ◽  
pp. e12428 ◽  
Author(s):  
Xiao-Jian Xu ◽  
Shu-Min Wang ◽  
Ying Jin ◽  
Yun-Tao Hu ◽  
Kang Feng ◽  
...  
Keyword(s):  
Mouse Model ◽  
Retinitis Pigmentosa ◽  
Autosomal Recessive ◽  
Photoreceptor Degeneration

scholarly journals Iron-Chelating Drugs Enhance Cone Photoreceptor Survival in a Mouse Model of Retinitis Pigmentosa

2017 ◽  
Vol 58 (12) ◽  
pp. 5287 ◽  
Author(s):  
Ke Wang ◽  
Bo Peng ◽  
Jia Xiao ◽  
Orly Weinreb ◽  
Moussa B. H. Youdim ◽  
...  
Keyword(s):  
Mouse Model ◽  
Retinitis Pigmentosa ◽  
Cone Photoreceptor

scholarly journals The cGMP-Dependent Protein Kinase 2 Contributes to Cone Photoreceptor Degeneration in the Cnga3-Deficient Mouse Model of Achromatopsia

2020 ◽  
Vol 22 (1) ◽  
pp. 52
Author(s):  
Mirja Koch ◽  
Constanze Scheel ◽  
Hongwei Ma ◽  
Fan Yang ◽  
Michael Stadlmeier ◽  
...  
Keyword(s):  
Protein Kinase ◽  
Mouse Model ◽  
Cyclic Guanosine Monophosphate ◽  
Guanosine Monophosphate ◽  
Cone Photoreceptor ◽  
Photoreceptor Degeneration ◽  
Dependent Protein Kinase ◽  
Genetic Ablation ◽  
Cgmp Dependent Protein Kinase ◽  
Dependent Protein

Mutations in the CNGA3 gene, which encodes the A subunit of the cyclic guanosine monophosphate (cGMP)-gated cation channel in cone photoreceptor outer segments, cause total colour blindness, also referred to as achromatopsia. Cones lacking this channel protein are non-functional, accumulate high levels of the second messenger cGMP and degenerate over time after induction of ER stress. The cell death mechanisms that lead to loss of affected cones are only partially understood. Here, we explored the disease mechanisms in the Cnga3 knockout (KO) mouse model of achromatopsia. We found that another important effector of cGMP, the cGMP-dependent protein kinase 2 (Prkg2) is crucially involved in cGMP cytotoxicity of cones in Cnga3 KO mice. Virus-mediated knockdown or genetic ablation of Prkg2 in Cnga3 KO mice counteracted degeneration and preserved the number of cones. Analysis of markers of endoplasmic reticulum stress and unfolded protein response confirmed that induction of these processes in Cnga3 KO cones also depends on Prkg2. In conclusion, we identified Prkg2 as a novel key mediator of cone photoreceptor degeneration in achromatopsia. Our data suggest that this cGMP mediator could be a novel pharmacological target for future neuroprotective therapies.

Clinical spectrum, genetic associations and management outcomes of Coats-like exudative retinal vasculopathy in autosomal recessive retinitis pigmentosa

2021 ◽  
pp. 1-8
Author(s):  
Moustafa Magliyah ◽  
Abdulaziz A. Alshamrani ◽  
Patrik Schatz ◽  
Ibrahim Taskintuna ◽  
Yahya Alzahrani ◽  
...  
Keyword(s):  
Retinitis Pigmentosa ◽  
Autosomal Recessive ◽  
Clinical Spectrum ◽  
Genetic Associations

In vivo potency testing of subretinal rAAV5.hCNGB1 gene therapy in the Cngb1 knockout mouse model of retinitis pigmentosa

2021 ◽  
Author(s):  
Johanna E Wagner ◽  
Lena Zobel ◽  
Maximilian Joachim Gerhardt ◽  
Catherine R O'Riordan ◽  
Amy Frederick ◽  
...  
Keyword(s):  
Gene Therapy ◽  
Mouse Model ◽  
Retinitis Pigmentosa ◽  
Knockout Mouse ◽  
Knockout Mouse Model

scholarly journals A new autosomal recessive retinitis pigmentosa locus maps on chromosome 2q31-q33.

1998 ◽  
Vol 35 (2) ◽  
pp. 141-145 ◽  
Author(s):  
M Bayes ◽  
B Goldaracena ◽  
A Martinez-Mir ◽  
M I Iragui-Madoz ◽  
T Solans ◽  
...  
Keyword(s):  
Retinitis Pigmentosa ◽  
Autosomal Recessive

scholarly journals Autosomal Recessive Retinitis Pigmentosa Caused by Mutations in theMAKGene

2011 ◽  
Vol 52 (13) ◽  
pp. 9665 ◽  
Author(s):  
Edwin M. Stone ◽  
Xunda Luo ◽  
Elise Héon ◽  
Byron L. Lam ◽  
Richard G. Weleber ◽  
...  
Keyword(s):  
Retinitis Pigmentosa ◽  
Autosomal Recessive
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