A farnesyltransferase inhibitor improves disease phenotypes in mice with a Hutchinson-Gilford progeria syndrome mutation.
Hutchinson-Gilford progeria syndrome (HGPS) is caused by the production of a truncated prelamin A, called progerin, which is farnesylated at its carboxyl terminus. Progerin is targeted to the nuclear envelope and causes misshapen nuclei. Protein farnesyltransferase inhibitors (FTI) mislocalize progerin away from the nuclear envelope and reduce the frequency of misshapen nuclei. To determine whether an FTI would ameliorate disease phenotypes in vivo, we created gene-targeted mice with an HGPS mutation (LmnaHG/+) and then examined the effect of an FTI on disease phenotypes. LmnaHG/+ mice exhibited phenotypes similar to those in human HGPS patients, including retarded growth, reduced amounts of adipose tissue, micrognathia, osteoporosis, and osteolytic lesions in bone. Osteolytic lesions in the ribs led to spontaneous bone fractures. Treatment with an FTI increased adipose tissue mass, improved body weight curves, reduced the number of rib fractures, and improved bone mineralization and bone cortical thickness. These studies suggest that FTIs could be useful for treating humans with HGPS.
Yang
Shao H
SH
Department of Medicine, Division of Cardiology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA, and Department of Medicine, Wallenberg Laboratory, Sahlgrenska University Hospital, Göteborg, Sweden.
Meta
Margarita
M
Qiao
Xin
X
Frost
David
D
Bauch
Joy
J
Coffinier
Catherine
C
Majumdar
Sharmila
S
Bergo
Martin O
MO
Young
Stephen G
SG
Fong
Loren G
LG
D000818:Animals; D001847:Bone Diseases / Q000000981:diagnostic imaging; D001842:Bone and Bones / Q000000981:diagnostic imaging; D004195:Disease Models, Animal; D004791:Enzyme Inhibitors / Q000627:therapeutic use*; D051231:Farnesyltranstransferase / Q000037:antagonists & inhibitors*; D051379:Mice; D009154:Mutation; D011371:Progeria / Q000000981:diagnostic imaging / Q000188:drug therapy / Q000235:genetics*; D011859:Radiography
D004791:Enzyme Inhibitors; D051231:Farnesyltranstransferase