Intramyocellular lipids (or IMCL) are
fat
In nutrition science, nutrition, biology, and chemistry, fat usually means any ester of fatty acids, or a mixture of such chemical compound, compounds, most commonly those that occur in living beings or in food.
The term often refers specif ...
s stored in droplets in
muscle cells
A muscle cell, also known as a myocyte, is a mature contractile cell in the muscle of an animal. In humans and other vertebrates there are three types: skeletal, smooth, and cardiac (cardiomyocytes). A skeletal muscle cell is long and threadli ...
. They provide an important energy source for working muscle. During exercise, a large amount of circulating
free fatty acids
In chemistry, in particular in biochemistry, a fatty acid is a carboxylic acid with an aliphatic chain, which is either saturated or unsaturated. Most naturally occurring fatty acids have an unbranched chain of an even number of carbon atoms, f ...
are directed into muscle cells for energy; during rest, incoming fatty acids are instead stored in the muscle cell as
triglyceride
A triglyceride (from '' tri-'' and '' glyceride''; also TG, triacylglycerol, TAG, or triacylglyceride) is an ester derived from glycerol and three fatty acids.
Triglycerides are the main constituents of body fat in humans and other vertebrates ...
s for later burning.
However, an increase in muscle insulin resistance, caused by
obesity
Obesity is a medical condition, considered by multiple organizations to be a disease, in which excess Adipose tissue, body fat has accumulated to such an extent that it can potentially have negative effects on health. People are classifi ...
,
diabetes mellitus type 2
Type 2 diabetes (T2D), formerly known as adult-onset diabetes, is a form of diabetes mellitus that is characterized by high blood sugar, insulin resistance, and relative lack of insulin. Common symptoms include increased thirst, frequent ...
, and
metabolic syndrome
Metabolic syndrome is a clustering of at least three of the following five medical conditions: abdominal obesity, high blood pressure, high blood sugar, high serum triglycerides, and low serum high-density lipoprotein (HDL).
Metabolic syndro ...
, will result in an excess accumulation of intramyocellular lipids.
See also
Insulin glargine
Insulin glargine sold under the brand name Lantus among others is a long-acting modified form of medical insulin, used in the management of type 1 and type 2 diabetes. It is injected just under the skin. Effects generally begin an hour af ...
References
External links
Intramyocellular lipid content in human skeletal muscle
Skeletal muscle
Tissues (biology)
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