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 (sē′krə-tās′, -tāz′)
Any of three subtypes of a protease located in cell membranes of the brain. In Alzheimer's disease, a secretase (designated beta) degrades amyloid precursor protein into beta-amyloid peptides that accumulate to form amyloid plaques.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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Noun1.secretase - a set of enzymes believed to snip pieces off a longer protein producing fragments of amyloid protein that bunch up and create amyloid protein plaques in brain tissue (the pathological hallmark of Alzheimer's)
enzyme - any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Gamma secretase cleaves multiple transmembrane protein complexes, including Notch, which is believed to play a role in activating pathways that contribute to desmoid tumor growth.
Now, the researchers are all set to show that deactivating these pathways in part by using a class of AD drug, called gamma secretase inhibitor, could reduce loss of neurons in animal models of traumatic brain injury.
They have now been able to demonstrate that the complex assumes a different shape and function according to the tissue in which the secretase is active.
The mice used in the study were genetically altered to lack beta secretase, which meant they were incapable of producing amyloid.
Eli Lilly (LLY) and AstraZeneca (AZN) are discontinuing the global Phase 3 clinical trials of lanabecestat, an oral beta secretase cleaving enzyme, or BACE, inhibitor, for the treatment of Alzheimer's disease.
The gamma secretase inhibitors (GSIs) are common drugs which are used to decrease activated form of NOTCH1 influencing cancer cells proliferation and apoptosis [9,14].
In patient-derived cancer xenografts with Notch-1 mutation, the detection of high sensitivity of a gamma secretase inhibitor (gamma secretase is responsible for activation of Notch receptors) confirmed the results [64, 69, 70].
This secretase is formed by an assembly of four smaller proteins, including presenilins 1 and 2 (Chouraki et al., 2014).
announced today that the latest data on its oral dual orexin receptor antagonist lemborexant and its oral beta secretase cleaving enzyme (BACE) inhibitor elenbecestat(1) will be presented at the 10th Clinical Trials on Alzheimer's Disease (CTAD), taking place in Boston, the United States, from November 1 to 4.
We also analyzed whether a decrease in SORL1 levels in AD neurons might affect the binding of SORL1 to APP and how this was affected by secretase inhibitors.
Abbreviations: hCSP3 = human caspase-3; hPARP- 1 = human Poly(ADP-ribose)polymerase-1; hAPP= human amyloid precursor protein; hBACE-1 =human [beta]-APP cleaving enzyme 1; hADAM-10=hu-man antiamyloidogenic secretase, a Disintegrin and Metalloproteinase 10; hSOD1 = human Cu,Zn superoxide dismutase; hCAT=human catalase; hGR=human glutathione reductase; hGPx = human glutathione peroxidase: hGADPH (or hG3PDH)=human glyceraldehyde 3-phosphate dehydrogenase.