TY - JOUR
T1 - The P274S Mutation of Lecithin-Cholesterol Acyltransferase (LCAT) and Its Clinical Manifestations in a Large Kindred
AU - Fountoulakis, Nikolaos
AU - Lioudaki, Eirini
AU - Lygerou, Dimitra
AU - Dermitzaki, Eleftheria-Kleio
AU - Papakitsou, Ioanna
AU - Kounali, Vasiliki
AU - Holleboom, Adriaan G.
AU - Stratigis, Spyros
AU - Belogianni, Christina
AU - Syngelaki, Paraskevi
AU - Stratakis, Stavros
AU - Evangeliou, Athanasios
AU - Gakiopoulou, Hariklia
AU - Kuivenhoven, Jan Albert
AU - Wevers, Ron
AU - Dafnis, Eugene
AU - Stylianou, Kostas
N1 - Copyright © 2019 National Kidney Foundation, Inc. Published by Elsevier Inc. All rights reserved.
PY - 2019/10
Y1 - 2019/10
N2 - Rationale & Objective: Lecithin-cholesterol acyltransferase (LCAT) catalyzes the maturation of high-density lipoprotein. Homozygosity for loss-of-function mutations causes familial LCAT deficiency (FLD), characterized by corneal opacities, anemia, and renal involvement. This study sought to characterize kidney biopsy findings and clinical outcomes in a family with FLD. Study Design: Prospective observational study. Setting & Participants: 2 (related) index patients with clinically apparent FLD were initially identified. 110 of 122 family members who consented to genetic analysis were also studied. Predictors: Demographic and laboratory parameters (including lipid profiles and LCAT activity) and full sequence analysis of the LCAT gene. Kidney histologic examination was performed with samples from 6 participants. Outcomes: Cardiovascular and renal events during a median follow-up of 12 years. Estimation of annual rate of decline in glomerular filtration rate. Analytical Approach: Analysis of variance, linear regression analysis, and Fine-Gray competing-risk survival analysis. Results: 9 homozygous, 57 heterozygous, and 44 unaffected family members were identified. In all affected individuals, full sequence analysis of the LCAT gene revealed a mutation (c.820C>T) predicted to cause a proline to serine substitution at amino acid 274 (P274S). Homozygosity caused a complete loss of LCAT activity. Kidney biopsy findings demonstrated lipid deposition causing glomerular basement membrane thickening, mesangial expansion, and “foam-cell” infiltration of kidney tissue. Tubular atrophy, glomerular sclerosis, and complement fixation were associated with worse kidney outcomes. Estimated glomerular filtration rate deteriorated among homozygous family members at an average annual rate of 3.56 mL/min/1.73 m 2 . The incidence of cardiovascular and renal complications was higher among homozygous family members compared with heterozygous and unaffected members. Mild thrombocytopenia was a common finding among homozygous participants. Limitations: The presence of cardiovascular disease was mainly based on medical history. Conclusions: The P274S LCAT mutation was found to cause FLD with renal involvement. Tubular atrophy, glomerular sclerosis, and complement fixation were associated with a worse renal prognosis.
AB - Rationale & Objective: Lecithin-cholesterol acyltransferase (LCAT) catalyzes the maturation of high-density lipoprotein. Homozygosity for loss-of-function mutations causes familial LCAT deficiency (FLD), characterized by corneal opacities, anemia, and renal involvement. This study sought to characterize kidney biopsy findings and clinical outcomes in a family with FLD. Study Design: Prospective observational study. Setting & Participants: 2 (related) index patients with clinically apparent FLD were initially identified. 110 of 122 family members who consented to genetic analysis were also studied. Predictors: Demographic and laboratory parameters (including lipid profiles and LCAT activity) and full sequence analysis of the LCAT gene. Kidney histologic examination was performed with samples from 6 participants. Outcomes: Cardiovascular and renal events during a median follow-up of 12 years. Estimation of annual rate of decline in glomerular filtration rate. Analytical Approach: Analysis of variance, linear regression analysis, and Fine-Gray competing-risk survival analysis. Results: 9 homozygous, 57 heterozygous, and 44 unaffected family members were identified. In all affected individuals, full sequence analysis of the LCAT gene revealed a mutation (c.820C>T) predicted to cause a proline to serine substitution at amino acid 274 (P274S). Homozygosity caused a complete loss of LCAT activity. Kidney biopsy findings demonstrated lipid deposition causing glomerular basement membrane thickening, mesangial expansion, and “foam-cell” infiltration of kidney tissue. Tubular atrophy, glomerular sclerosis, and complement fixation were associated with worse kidney outcomes. Estimated glomerular filtration rate deteriorated among homozygous family members at an average annual rate of 3.56 mL/min/1.73 m 2 . The incidence of cardiovascular and renal complications was higher among homozygous family members compared with heterozygous and unaffected members. Mild thrombocytopenia was a common finding among homozygous participants. Limitations: The presence of cardiovascular disease was mainly based on medical history. Conclusions: The P274S LCAT mutation was found to cause FLD with renal involvement. Tubular atrophy, glomerular sclerosis, and complement fixation were associated with a worse renal prognosis.
UR - https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85065591889&origin=inward
UR - https://www.ncbi.nlm.nih.gov/pubmed/31103331
U2 - https://doi.org/10.1053/j.ajkd.2019.03.422
DO - https://doi.org/10.1053/j.ajkd.2019.03.422
M3 - Article
C2 - 31103331
SN - 0272-6386
VL - 74
SP - 510
EP - 522
JO - American Journal of Kidney Diseases
JF - American Journal of Kidney Diseases
IS - 4
ER -