DARPP32, a target of hyperactive mTORC1 in the retinal pigment epithelium.
DARPP32, a target of hyperactive mTORC1 in the retinal pigment epithelium.
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DOI:
10.1073/pnas.2207489119
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发表时间:
2022-08-16
影响因子:
11.1
通讯作者:
中科院分区:
文献类型:
--
作者:
The mechanistic target of rapamycin (mTOR) is assembled into signaling complexes of mTORC1 or mTORC2, and plays key roles in cell metabolism, stress response, and nutrient and growth factor sensing. Accumulating evidence from human and animal model studies has demonstrated a pathogenic role of hyperactive mTORC1 in age-related macular degeneration (AMD). The retinal pigment epithelium (RPE) is a primary injury site in AMD. In mouse models of RPE-specific deletion of Tuberous sclerosis 1 (Tsc1), which encodes an upstream suppressor of mTORC1, the hyperactivated mTORC1 metabolically reprogrammed the RPE and led to the degeneration of the outer retina and choroid (CH). In the current study, we use single-cell RNA sequencing (scRNA-seq) to identify an RPE mTORC1 downstream protein, dopamine- and cyclic AMP-regulated phosphoprotein of molecular weight 32,000 (DARPP-32). DARPP-32 was not found in healthy RPE but localized to drusen and basal linear deposits in human AMD eyes. In animal models, overexpressing DARPP-32 by adeno-associated virus (AAV) led to abnormal RPE structure and function. The data indicate that DARPP-32 is a previously unidentified signaling protein subjected to mTORC1 regulation and may contribute to RPE degeneration in AMD.
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影响因子:
4.6
作者:
Zhang, Meng;Jiang, Nisi;Golestaneh, Nady
通讯作者:
Golestaneh, Nady
影响因子:
46.9
作者:
Butler A;Hoffman P;Smibert P;Papalexi E;Satija R
通讯作者:
Satija R
影响因子:
12.4
作者:
Huang, Jiancheng;Gu, Shun;Zhao, Chen
通讯作者:
Zhao, Chen
DOI:
10.1084/jem.20190730
发表时间:
2020-06-01
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Lehmann GL;Hanke-Gogokhia C;Hu Y;Bareja R;Salfati Z;Ginsberg M;Nolan DJ;Mendez-Huergo SP;Dalotto-Moreno T;Wojcinski A;Ochoa F;Zeng S;Cerliani JP;Panagis L;Zager PJ;Mullins RF;Ogura S;Lutty GA;Bang J;Zippin JH;Romano C;Rabinovich GA;Elemento O;Joyner AL;Rafii S;Rodriguez-Boulan E;Benedicto I
通讯作者:
Benedicto I
影响因子:
15.9
作者:
Zhao, Chen;Yasumura, Douglas;Vollrath, Douglas
通讯作者:
Vollrath, Douglas