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I read here and here that the function of lipoprotein lipase is to facilitate fat uptake and storage in adipose tissue. Could anyone provide a slightly more expanded explanation, without going into too much detail, and without the use of too much jargon (I am not a biologist). I have read the wikipedia page, but sadly I didn't understand it....Thanks !

Edit: One of the things that is confusing me is what "fat uptake" means in this context.

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up vote 10 down vote accepted

Fat uptake means cells eating fat.

I'll try to keep it simple, so forget the many approximations. You need first to consider that most fat circulates in the blood under the form of triglycerides (TG). TG are not soluble in water, so how do they circulate? They are hidden inside cargo vehicles called lipoproteins. When a circulating lipoprotein touches a cell, if the cell expresses lipoprotein lipase (LPL), first LPL would trap the lipoprotein cargo, and then will start to catabolize the TG.

Importantly, there are no efficient TG cargoes inside the cell, so the function of lipoprotein lipase is to make fat easy to move inside the cell. TG are a chemical assembly of one glycerol and three fatty acids. Of note, there are good fatty acid cargoes inside the cell, so LPL will break TG into glycerol and fatty acids so that they can be further metabolized depending on the cell type.

Heart and muscle cells will bring fatty acids to mitochondria where they will be oxidized to produce energy. With reference to your question, adipocyte cells will bring fatty acids to other cellular compartments where they will be converted back to triglycerides and stored as fat. That's why you read that LPL facilitates fat uptake and storage in adipose tissue.

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Great answer. Thank you ! I would upvote, but I don't have sufficient rep myself (yet). Just a further query: when I read: "facilitate fat uptake and storage" would I be right in saying the /primary/ function is fat uptake, which then results in fat storage (in adipocytes). –  Robert Long May 8 '12 at 11:05
    
No. All cells need fats, primarily to build membranes and to store in vesicles for later conversion to energy. Storage is not restricted to adipocytes. –  Larry_Parnell May 8 '12 at 14:42
    
@Larry_Parnell Sorry, by writing "(adipocytes)" I meant to query whether the /primary/ function of LPL in adipose tissue is fat storage ? I took home from the answer is that LPL performs fat uptake and thereby facilitates fat storage. –  Robert Long May 8 '12 at 16:09
    
+1 by the way :) –  Robert Long May 8 '12 at 16:11
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