Projects per year
Abstract
Insulin receptor (IR) plays a key role in the control of glucose homeostasis; however, the regulation of its cellular expression remains poorly understood. Here we show that the amount of biologically active IR is regulated by the cleavage of its ectodomain, by the β-site amyloid precursor protein cleaving enzyme 1 (BACE1), in a glucose concentration-dependent manner. In vivo studies demonstrate that BACE1 regulates the amount of IR and insulin signaling in the liver. During diabetes, BACE1-dependent cleavage of IR is increased and the amount of IR in the liver is reduced, whereas infusion of a BACE1 inhibitor partially restores liver IR. We suggest the potential use of BACE1 inhibitors to enhance insulin signaling during diabetes. Additionally, we show that plasma levels of cleaved IR reflect IR isoform A expression levels in liver tumors, which prompts us to propose that the measurement of circulating cleaved IR may assist hepatic cancer detection and management.
Original language | English |
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Article number | 1306 |
Pages (from-to) | 1-14 |
Number of pages | 14 |
Journal | Nature Communications |
Volume | 9 |
DOIs | |
Publication status | Published - 3 Apr 2018 |
Keywords
- Hepatocellular carcinoma
- Insulin signalling
- Proteases
- Type 2 diabetes
- Neoplasms/metabolism
- Signal Transduction
- Antigens, CD/metabolism
- Humans
- Mice, Inbred C57BL
- Glucose/chemistry
- Male
- Mice, Transgenic
- Glycosylation
- Aspartic Acid Endopeptidases/metabolism
- Amyloid Precursor Protein Secretases/metabolism
- Animals
- Liver/metabolism
- HEK293 Cells
- Insulin/metabolism
- Protein Domains
- Female
- Mice
- Diabetes Mellitus/metabolism
- Receptor, Insulin/metabolism
ASJC Scopus subject areas
- General Physics and Astronomy
- General Chemistry
- General Biochemistry,Genetics and Molecular Biology
Fingerprint
Dive into the research topics of 'The beta secretase BACE1 regulates the expression of the insulin receptor in the liver'. Together they form a unique fingerprint.Projects
- 2 Finished
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BACE1 and Endothelial Dysfunction in Diabetes (Project Grant scheme)
Ashford, M. (Investigator) & Khan, F. (Investigator)
1/10/15 → 30/09/18
Project: Research
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Targeting the Aspartic Protease BACE1 for Inhibition in Order to Increase Hypothalamic Leptin Sensitivity and Reverse Obesity
Ashford, M. (Investigator)
1/01/13 → 31/12/15
Project: Research
Profiles
-
Ashford, Michael
- Diabetes Endocrinology and Reproductive Biology - Professor (Teaching and Research)
Person: Academic