Mice carrying a R142C Notch 3 knock-in mutation do not develop a CADASIL-like phenotype.
CADASIL (Cerebral Autosomal Dominant Arteriopathy with Subcortical Infarcts and Leukoencephalopathy, MIM 125310) is a genetic vascular dementia disease that is linked to missense mutations, small in-frame deletions, and splice site mutations in the human Notch 3 gene. Here we describe the generation of a mouse knockin model for one of the most prevalent CADASIL mutations, an arginine to cysteine transition at position 141, R141C, which corresponds to mutation R142C in mouse NOTCH 3. CADASIL(R142C) mice show no apparent CADASIL-like phenotype after histological and MRI analysis. The NOTCH 3 (R142C) receptor is processed normally and does not appear to accumulate the ectodomain, which has been observed in CADASIL patients. We discuss possible reasons for the different outcomes of the same germline CADASIL mutation in mice and humans.
Lundkvist
Johan
J
Department of Cell and Molecular Biology, Medical Nobel Institute, Karolinska Institute, SE-171 77 Stockholm, Sweden.
Zhu
Shunwei
S
Hansson
Emil M
EM
Schweinhardt
Petra
P
Miao
Qing
Q
Beatus
Paul
P
Dannaeus
Karin
K
Karlström
Helena
H
Johansson
Clas B
CB
Viitanen
Matti
M
Rozell
Björn
B
Spenger
Christian
C
Mohammed
Abdul
A
Kalimo
Hannu
H
Lendahl
Urban
U
D019943:Amino Acid Substitution; D000818:Animals; D001013:Aorta, Thoracic / Q000473:pathology / Q000648:ultrastructure; D001522:Behavior, Animal; D015153:Blotting, Western; D046589:CADASIL / Q000235:genetics*; D017536:Carotid Artery, Common / Q000473:pathology / Q000648:ultrastructure; D003545:Cysteine / Q000378:metabolism; D018095:Germ-Line Mutation; D008279:Magnetic Resonance Imaging; D008297:Male; D051379:Mice; D008817:Mice, Mutant Strains; D010641:Phenotype; D016133:Polymerase Chain Reaction; D011518:Proto-Oncogene Proteins / Q000235:genetics*; D000074562:Receptor, Notch4; D011956:Receptors, Cell Surface / Q000235:genetics*; D051880:Receptors, Notch; D017422:Sequence Analysis, DNA; D013904:Thoracic Vertebrae / Q000000981:diagnostic imaging; D014463:Ultrasonography
D011518:Proto-Oncogene Proteins; D000074562:Receptor, Notch4; D011956:Receptors, Cell Surface; D051880:Receptors, Notch; C073572:Notch4 protein, mouse; D003545:Cysteine