Cited by 112Cholesterol and Lipid MetabolismLipoproteins and Cardiovascular HealthLipid metabolism and disorders

Low density lipoprotein receptor-binding activity in human tissues: quantitative importance of hepatic receptors and evidence for regulation of their expression in vivo.

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Rudling, M J, Reihnér, E, Einarsson, K, Ewerth, S, Angelin, B·1990·Proceedings of the National Academy of Sciences

Abstract

The heparin-sensitive binding of 125I-labeled low-density lipoprotein (LDL) to homogenates from 18 different normal human tissues and some solid tumors was determined. The binding to adrenal and liver homogenates fulfilled criteria established for the binding of LDL to its receptor--namely, (i) saturability, (ii) sensitivity to proteolytic destruction, (iii) inhibition by EDTA, and (iv) heat sensitivity. When the binding of 125I-labeled LDL was assayed at a constant concentration (50 micrograms/ml), the adrenal gland and the ovary had the highest binding of normal tissues. The highest binding per g of tissue overall was obtained in homogenates of a gastric carcinoma and a parotid adenoma. When the weights of the parenchymatous organs were considered, the major amount of LDL receptors was contained in the liver. To study the possible regulation of hepatic LDL-receptor expression, 11 patients were pretreated with cholestyramine (8 g twice a day for 3 weeks). Increased binding activity (+105%, P less than 0.001) was obtained in homogenates from liver biopsies from the cholestyramine-treated patients as compared with 12 untreated controls. It is concluded that the liver is the most important organ for LDL catabolism in humans and that the receptor activity in this organ can be regulated upon pharmacologic intervention. Further studies are needed to confirm the possibility that certain solid tumors can exhibit high numbers of LDL receptors.

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Crossref · 10.1073/pnas.87.9.3469

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Authors
Rudling, M. J., Reihnér, E., Einarsson, K., Ewerth, S., & Angelin, B.
Affiliations
Karolinska Institutet (SE)
Venue
Proceedings of the National Academy of Sciences
Published
1990-05
Volume
87
Issue
9
Pages
3469-3473
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W1998600489
Cited by
112
References
36
Citations by year
2025: 1 · 2023: 1 · 2022: 2 · 2021: 1 · 2020: 2 · 2019: 3 · 2018: 2 · 2017: 3 · 2016: 3 · 2015: 4 · 2014: 3 · 2013: 4 · 2012: 2
FWCI
11.31
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Surgery › Cholesterol and Lipid Metabolism
  • Health Sciences › Medicine › Surgery › Lipoproteins and Cardiovascular Health
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Lipid metabolism and disorders
Keywords
LDL receptor, hepatic LDL receptor, receptor regulation, cholestyramine, LDL catabolism, adrenal gland, liver, solid tumors
MeSH terms
Adrenal Cortex, Adult, Aged, Cholelithiasis, Edetic Acid, Female, Gene Expression Regulation, Humans, Kinetics, Lipoproteins, LDL, Liver, Male, Middle Aged, Neoplasms, Organ Specificity, Receptors, LDL, Reference Values, Thermodynamics

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