What is low - density lipoprotein receptor pathway, Biology

Assignment Help:

Q. What is low - density lipoprotein receptor pathway?

Ans.

The increasing cellular free cholesterol generated regulates the activities of two enzymes that are of crucial importance in cholesterol homeostasis. HMG-CoA reductase (the major rate-determining enzyme in the cholesterol synthetic pathway) is inhibited, reducing cholesterol synthesis. Acyl CoA: cholesterol acyl transferase (ACAT) is activated, thus facilitating the re-esterification of cholesterol to cholesterol ester.

Thus the LDL receptor pathway is a closely integrated system by which cells acquire cholesterol and cellular cholesterol homeostasis is maintained. The therapeutic potential of interrupting this pathway will become apparent when the statin drugs which are inhibitors of HMG-CoA reductase are discussed.

It is the activity of LDL receptors in the liver that largely controls plasma LDL levels. Approximately 70 per cent of LDL is removed by this pathway.


Related Discussions:- What is low - density lipoprotein receptor pathway

Contractility, Myocardial contractility is mostly dependent on the level of...

Myocardial contractility is mostly dependent on the level of sympathetic nerve activity and is also increased by circulating catecholamines and inotropic drugs like dopamine and do

Explain the absorption and transport of vitamin e, Explain the Absorption a...

Explain the Absorption and Transport of Vitamin E? Absorption of vitamin E from the intestine depends on adequate pancreatic function, biliary secretion and micelle form

What is the functional unity of the kidneys, Q. What is the functional unit...

Q. What is the functional unity of the kidneys? The functional (filtering) unity of the kidneys is the nephron a nephron is made of efferent arteriole, afferent arteriole, glom

Types of growth, KINDS OF GROWTH - 1 .      AUXETIC GROWTH - Body...

KINDS OF GROWTH - 1 .      AUXETIC GROWTH - Body grows by enlargement of its cells without increase in number of cells. eg. Nematodes, rotifers, tunicates. Growth of b

What is a biodigester, What is a biodigester? A biodigester is equipmen...

What is a biodigester? A biodigester is equipment that creates carbon dioxide, hydrogen sulfide and fuel gases (biogases) like methane from organic material under decomposition

Where is the patient most likely to experience, The most recent blood work ...

The most recent blood work of a patient with a diagnosis of acute myelogenous leukemia (AML) reveals thrombocytopenia. Where is the patient most likely to experience abnormal bleed

Dictyosomes, Dictyosomes  are produced on the Organelles in the plant cells...

Dictyosomes  are produced on the Organelles in the plant cells composed of the series of flattened membrane sacs which sort, chemically modify, and package protein srough endoplasm

How would contrast single covalent bonds, 1. In modern blimps, the gas of c...

1. In modern blimps, the gas of choice used to inflate them is helium rather than hydrogen. Hydrogen would be lighter, but helium is safer. Compare and contrast the atomic structur

Glucagon and glucocorticoids, Important  aspects  related to regulation inc...

Important  aspects  related to regulation include: 1)  The hormones glucagon and glucocorticoids  which are  secreted  during  starvation stimulate  glucose-6-phosphatase to en

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd