Axonal generation of amyloid-β from palmitoylated APP in mitochondria-associated endoplasmic reticulum membranes.
Axonal generation of amyloid-β from palmitoylated APP in mitochondria-associated endoplasmic reticulum membranes.
复制标题
DOI:
10.1016/j.celrep.2021.109134
复制
发表时间:
2021-05-18
期刊:
影响因子:
8.8
通讯作者:
Tanzi RE
中科院分区:
文献类型:
--
作者:
Bhattacharyya R;Black SE;Lotlikar MS;Fenn RH;Jorfi M;Kovacs DM;Tanzi RE
Axonal generation of Alzheimer’s disease (AD)-associated amyloid-β (Aβ) plays a key role in AD neuropathology, but the cellular mechanisms involved in its release have remained elusive. We previously reported that palmitoylated APP (palAPP) partitions to lipid rafts where it serves as a preferred substrate for β-secretase. Mitochondria-associated endoplasmic reticulum (ER) membranes (MAMs) are cholesterol-rich lipid rafts that are upregulated in AD. Here, we show that downregulating MAM assembly by either RNA silencing or pharmacological modulation of the MAM-resident sigma1 receptor (S1R) leads to attenuated β-secretase cleavage of palAPP. Upregulation of MAMs promotes trafficking of palAPP to the cell surface, β-secretase cleavage, and Aβ generation. We develop a microfluidic device and use it to show that MAM levels alter Aβ generation specifically in neuronal processes and axons, but not in cell bodies. These data suggest therapeutic strategies for reducing axonal release of Aβ and attenuating β-amyloid pathology in AD. Bhattacharyya et al. show that the modulation of mitochondrial-associated endoplasmic reticulum membranes (MAMs) via sigma-1 receptor regulates Aβ generation from axons via cell surface trafficking and β-secretase cleavage of MAM-resident palmitoylated APP (palAPP).
登录
查看更多内容
DOI:
10.1016/j.biocel.2009.04.010
发表时间:
2009-10
影响因子:
4
作者:
Giorgi, Carlotta;De Stefani, Diego;Bononi, Angela;Rizzuto, Rosario;Pinton, Paolo
通讯作者:
Pinton, Paolo
影响因子:
11.4
作者:
Area-Gomez, Estela;Castillo, Maria Del Carmen Lara;Tambini, Marc D.;Guardia-Laguarta, Cristina;de Groof, Ad J. C.;Madra, Moneek;Ikenouchi, Junichi;Umeda, Masato;Bird, Thomas D.;Sturley, Stephen L.;Schon, Eric A.
通讯作者:
Schon, Eric A.
影响因子:
4
作者:
Gyorgy Hajnoczky;Gyrogy Csordas;Yi, Muqing
通讯作者:
Yi, Muqing
影响因子:
4.8
作者:
Dai, Chun-Ling;Shi, Jianhua;Gong, Cheng-Xin
通讯作者:
Gong, Cheng-Xin
影响因子:
82.9
作者:
HAASS, C;LEMERE, CA;SELKOE, DJ
通讯作者:
SELKOE, DJ