Abstract:
:Hypertriglyceridemia is a hallmark of many disorders, including metabolic syndrome, diabetes, atherosclerosis and obesity. A well-known cause is the deficiency of lipoprotein lipase (LPL), a key enzyme in plasma triglyceride hydrolysis. Mice carrying the combined lipase deficiency (cld) mutation show severe hypertriglyceridemia owing to a decrease in the activity of LPL and a related enzyme, hepatic lipase (HL), caused by impaired maturation of nascent LPL and hepatic lipase polypeptides in the endoplasmic reticulum (ER). Here we identify the gene containing the cld mutation as Tmem112 and rename it Lmf1 (Lipase maturation factor 1). Lmf1 encodes a transmembrane protein with an evolutionarily conserved domain of unknown function that localizes to the ER. A human subject homozygous for a deleterious mutation in LMF1 also shows combined lipase deficiency with concomitant hypertriglyceridemia and associated disorders. Thus, through its profound effect on lipase activity, LMF1 emerges as an important candidate gene in hypertriglyceridemia.
journal_name
Nat Genetjournal_title
Nature geneticsauthors
Péterfy M,Ben-Zeev O,Mao HZ,Weissglas-Volkov D,Aouizerat BE,Pullinger CR,Frost PH,Kane JP,Malloy MJ,Reue K,Pajukanta P,Doolittle MHdoi
10.1038/ng.2007.24subject
Has Abstractpub_date
2007-12-01 00:00:00pages
1483-7issue
12eissn
1061-4036issn
1546-1718pii
ng.2007.24journal_volume
39pub_type
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