scholarly journals Modulation of ATP-sensitive Potassium Channels by cGMP-dependent Protein Kinase in Rabbit Ventricular Myocytes

2001 ◽  
Vol 276 (25) ◽  
pp. 22140-22147 ◽  
Author(s):  
Jin Han ◽  
Nari Kim ◽  
Euiyong Kim ◽  
Won-Kyung Ho ◽  
Yung E Earm
Keyword(s):  
Protein Kinase ◽  
Potassium Channels ◽  
Ventricular Myocytes ◽  
Dependent Protein Kinase ◽  
Cgmp Dependent Protein Kinase ◽  
Dependent Protein ◽  
Rabbit Ventricular Myocytes

cDNA Cloning and Gene Expression of Human Type Iα cGMP-Dependent Protein Kinase

Hypertension ◽  
1996 ◽  
Vol 27 (3) ◽  
pp. 552-557 ◽  
Author(s):  
Naohisa Tamura ◽  
Hiroshi Itoh ◽  
Yoshihiro Ogawa ◽  
Osamu Nakagawa ◽  
Masaki Harada ◽  
...  
Keyword(s):  
Gene Expression ◽  
Protein Kinase ◽  
Cdna Cloning ◽  
Dependent Protein Kinase ◽  
Human Type ◽  
Cgmp Dependent Protein Kinase ◽  
Dependent Protein

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.

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