Abstract
Amyloid-β precursor protein (APP) correlates with the pathogenesis of certain brain diseases, such as Alzheimer disease (AD). APP is cleaved by several enzymes to produce APP metabolites, including the amyloid beta peptide (Aβ), which accumulates in the brain of AD patients. However, the exact functions of APP metabolites remain elusive. In this study, using genome editing technology, we mutated juxta- and intra-membrane domains of murine APP in the mouse neuroblastoma cell line, Neuro2a. We identified several clones that expressed characteristic patterns of APP metabolites. Mutations in juxta- (deletion 673A), and intra-membrane (deletion 705-6LM) domains of APP, decreased overall levels of APP metabolites or decreased the level of α-secretase-cleaved carboxy-terminal fragment (αCTF), respectively. APP is known to influence neuronal differentiation; therefore, we used theses clones to dissect the function of APP metabolites during neuronal differentiation. One clone (CA), which expressed reduced levels of both FL-APP and αCTF, showed increased expression of the neuronal marker, β3-tubulin, and enhanced retinoic acid (RA)-induced neurite outgrowth. In contrast, a clone that expressed FL-APP, but was devoid of αCTF (CE), showed comparable expression of β3-tubulin and neurite outgrowth compared with normal Neuro2a cells. These data indicate that FL-APP is a suppressor of neurite outgrowth. Our data suggest a novel regulatory function of juxta- and intra-membrane domains on the metabolism and function of APP.
| Original language | English |
|---|---|
| Pages (from-to) | 1023-1028 |
| Number of pages | 6 |
| Journal | Biochemical and Biophysical Research Communications |
| Volume | 501 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Jul 2 2018 |
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Keywords
- Alzheimer disease
- Amyloid beta
- Amyloid precursor protein
- Neurite outgrowth
ASJC Scopus subject areas
- Biophysics
- Biochemistry
- Molecular Biology
- Cell Biology
Cite this
Functional analysis of juxta- and intra-membrane domains of murine APP by genome editing in Neuro2a cells. / Kaneshiro, Nanaka; Imaoka, Ryosuke; Komai, Masato; Kashiyama, Taku; Sakurai, Takashi; Uehara, Takashi; Takasugi, Nobumasa.
In: Biochemical and Biophysical Research Communications, Vol. 501, No. 4, 02.07.2018, p. 1023-1028.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Functional analysis of juxta- and intra-membrane domains of murine APP by genome editing in Neuro2a cells
AU - Kaneshiro, Nanaka
AU - Imaoka, Ryosuke
AU - Komai, Masato
AU - Kashiyama, Taku
AU - Sakurai, Takashi
AU - Uehara, Takashi
AU - Takasugi, Nobumasa
PY - 2018/7/2
Y1 - 2018/7/2
N2 - Amyloid-β precursor protein (APP) correlates with the pathogenesis of certain brain diseases, such as Alzheimer disease (AD). APP is cleaved by several enzymes to produce APP metabolites, including the amyloid beta peptide (Aβ), which accumulates in the brain of AD patients. However, the exact functions of APP metabolites remain elusive. In this study, using genome editing technology, we mutated juxta- and intra-membrane domains of murine APP in the mouse neuroblastoma cell line, Neuro2a. We identified several clones that expressed characteristic patterns of APP metabolites. Mutations in juxta- (deletion 673A), and intra-membrane (deletion 705-6LM) domains of APP, decreased overall levels of APP metabolites or decreased the level of α-secretase-cleaved carboxy-terminal fragment (αCTF), respectively. APP is known to influence neuronal differentiation; therefore, we used theses clones to dissect the function of APP metabolites during neuronal differentiation. One clone (CA), which expressed reduced levels of both FL-APP and αCTF, showed increased expression of the neuronal marker, β3-tubulin, and enhanced retinoic acid (RA)-induced neurite outgrowth. In contrast, a clone that expressed FL-APP, but was devoid of αCTF (CE), showed comparable expression of β3-tubulin and neurite outgrowth compared with normal Neuro2a cells. These data indicate that FL-APP is a suppressor of neurite outgrowth. Our data suggest a novel regulatory function of juxta- and intra-membrane domains on the metabolism and function of APP.
AB - Amyloid-β precursor protein (APP) correlates with the pathogenesis of certain brain diseases, such as Alzheimer disease (AD). APP is cleaved by several enzymes to produce APP metabolites, including the amyloid beta peptide (Aβ), which accumulates in the brain of AD patients. However, the exact functions of APP metabolites remain elusive. In this study, using genome editing technology, we mutated juxta- and intra-membrane domains of murine APP in the mouse neuroblastoma cell line, Neuro2a. We identified several clones that expressed characteristic patterns of APP metabolites. Mutations in juxta- (deletion 673A), and intra-membrane (deletion 705-6LM) domains of APP, decreased overall levels of APP metabolites or decreased the level of α-secretase-cleaved carboxy-terminal fragment (αCTF), respectively. APP is known to influence neuronal differentiation; therefore, we used theses clones to dissect the function of APP metabolites during neuronal differentiation. One clone (CA), which expressed reduced levels of both FL-APP and αCTF, showed increased expression of the neuronal marker, β3-tubulin, and enhanced retinoic acid (RA)-induced neurite outgrowth. In contrast, a clone that expressed FL-APP, but was devoid of αCTF (CE), showed comparable expression of β3-tubulin and neurite outgrowth compared with normal Neuro2a cells. These data indicate that FL-APP is a suppressor of neurite outgrowth. Our data suggest a novel regulatory function of juxta- and intra-membrane domains on the metabolism and function of APP.
KW - Alzheimer disease
KW - Amyloid beta
KW - Amyloid precursor protein
KW - Neurite outgrowth
UR - http://www.scopus.com/inward/record.url?scp=85047350275&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85047350275&partnerID=8YFLogxK
U2 - 10.1016/j.bbrc.2018.05.102
DO - 10.1016/j.bbrc.2018.05.102
M3 - Article
C2 - 29777707
AN - SCOPUS:85047350275
VL - 501
SP - 1023
EP - 1028
JO - Biochemical and Biophysical Research Communications
JF - Biochemical and Biophysical Research Communications
SN - 0006-291X
IS - 4
ER -