title: Evidence of non-deficient low-density lipoprotein receptor patients in a pool of subjects with clinical familial hypercholesterolemia profile.
abstract: For this study, we selected 41 adult patients with the classic clinical diagnosis of heterozygous familial hypercholesterolemia (FH), which is characterized by a low-density lipoprotein (LDL) cholesterol level above the 95th percentile, xanthomas, and/or personal or familial cardiovascular history. We used an indirect immunocytofluorimetric assay to classify these 41 subjects according to LDL receptor function on lymphocytes. We found that LDL receptor activity was normal in nine patients. A large study of plasma lipid, lipoprotein, and apolipoprotein levels found no significant difference between patients with and without LDL receptor defect. Familial defective apolipoprotein (apo) B-100 (FDB) and LDL-binding defects were not found in the nine patients without LDL receptor defect. These results suggest that other defects in the regulation of lipoprotein metabolism are capable of giving rise to a clinical and biochemical disorder indistinguishable from classic FH.
authors.affiliation: SERLIA et INSERM U325, Institut Pasteur, Lille, France.
authors.forename: S
authors.initials: S
authors.lastname: Lestavel-Delattre
authors.forename: S
authors.initials: S
authors.lastname: Benhamamouch
authors.forename: G
authors.initials: G
authors.lastname: Agnani
authors.forename: G
authors.initials: G
authors.lastname: Luc
authors.forename: J M
authors.initials: JM
authors.lastname: Bard
authors.forename: T
authors.initials: T
authors.lastname: Brousseau
authors.forename: C
authors.initials: C
authors.lastname: Billardon
authors.forename: J P
authors.initials: JP
authors.lastname: Kusnierz
authors.forename: J L
authors.initials: JL
authors.lastname: De Gennes
authors.forename: J C
authors.initials: JC
authors.lastname: Fruchart
mesh_terms: D000328:Adult; D053299:Apolipoprotein B-100; D001055:Apolipoproteins B / Q000378:metabolism; D001483:Base Sequence; D008078:Cholesterol, LDL / Q000378:metabolism; D017931:DNA Primers; D005260:Female; D006367:HeLa Cells; D006801:Humans; D006938:Hyperlipoproteinemia Type II / Q000097:blood* / Q000235:genetics; D008214:Lymphocytes / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D008969:Molecular Sequence Data; D011973:Receptors, LDL / Q000378:metabolism*
chemical_list: D053299:Apolipoprotein B-100; D001055:Apolipoproteins B; D008078:Cholesterol, LDL; D017931:DNA Primers; D011973:Receptors, LDL