RRC ID 58430
Author Wada Y, Kikuchi A, Kaga A, Shimizu N, Ito J, Onuma R, Fujishima F, Totsune E, Sato R, Niihori T, Shirota M, Funayama R, Sato K, Nakazawa T, Nakayama K, Aoki Y, Aiba S, Nakagawa K, Kure S.
Title Metabolic and pathologic profiles of human LSS deficiency recapitulated in mice.
Journal PLoS Genet
Abstract Skin lesions, cataracts, and congenital anomalies have been frequently associated with inherited deficiencies in enzymes that synthesize cholesterol. Lanosterol synthase (LSS) converts (S)-2,3-epoxysqualene to lanosterol in the cholesterol biosynthesis pathway. Biallelic mutations in LSS have been reported in families with congenital cataracts and, very recently, have been reported in cases of hypotrichosis. However, it remains to be clarified whether these phenotypes are caused by LSS enzymatic deficiencies in each tissue, and disruption of LSS enzymatic activity in vivo has not yet been validated. We identified two patients with novel biallelic LSS mutations who exhibited congenital hypotrichosis and midline anomalies but did not have cataracts. We showed that the blockade of the LSS enzyme reaction occurred in the patients by measuring the (S)-2,3-epoxysqualene/lanosterol ratio in the forehead sebum, which would be a good biomarker for the diagnosis of LSS deficiency. Epidermis-specific Lss knockout mice showed neonatal lethality due to dehydration, indicating that LSS could be involved in skin barrier integrity. Tamoxifen-induced knockout of Lss in the epidermis caused hypotrichosis in adult mice. Lens-specific Lss knockout mice had cataracts. These results confirmed that LSS deficiency causes hypotrichosis and cataracts due to loss-of-function mutations in LSS in each tissue. These mouse models will lead to the elucidation of the pathophysiological mechanisms associated with disrupted LSS and to the development of therapeutic treatments for LSS deficiency.
Volume 16(2)
Pages e1008628
Published 2020-2-1
DOI 10.1371/journal.pgen.1008628
PMID 32101538
PMC PMC7062289
MeSH Adolescent Animals Cataract / congenital Cataract / genetics* Cataract / pathology Cholesterol / metabolism DNA Mutational Analysis Disease Models, Animal Epidermis / enzymology Epidermis / pathology* Exome Sequencing Holistic Health Humans Hypotrichosis / congenital Hypotrichosis / genetics* Hypotrichosis / pathology Intramolecular Transferases / genetics* Intramolecular Transferases / metabolism Lanosterol / analysis Lanosterol / metabolism Lens, Crystalline / enzymology Lens, Crystalline / pathology* Male Mice Mice, Knockout Mutation Pedigree Sebum / chemistry
IF 5.175
Times Cited 0
Mice RBRC01834
Human and Animal Cells HeLa(RCB0007)