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LPL gene
URL of this page: https://medlineplus.gov/genetics/gene/lpl/

LPL gene

lipoprotein lipase

Normal Function

The LPL gene provides instructions for making an enzyme called lipoprotein lipase. This enzyme is found primarily on the surface of cells that line tiny blood vessels (capillaries) within muscles and in fatty (adipose) tissue. Lipoprotein lipase plays a critical role in breaking down fat in the form of triglycerides, which are carried from various organs to the blood by molecules called lipoproteins.

Lipoprotein lipase breaks down triglycerides carried by two different types of lipoproteins, which bring fat to the bloodstream from different organs. Fat from the intestine, which is taken in from the diet, is transported to the bloodstream by lipoproteins called chylomicrons. Another type of lipoprotein called very low density lipoprotein (VLDL) carries triglycerides from the liver to the bloodstream. When lipoprotein lipase breaks down triglycerides, the fat molecules are used by the body as energy or stored in fatty tissue for later use.

Health Conditions Related to Genetic Changes

Familial lipoprotein lipase deficiency

More than 220 mutations in the LPL gene have been found to cause familial lipoprotein lipase deficiency. This condition disrupts the normal breakdown of triglycerides in the body, resulting in an increase of these fats. The most common mutation in people of European ancestry replaces the protein building block (amino acid) glycine with the amino acid glutamic acid at position 188 in the enzyme (written as Gly188Glu or G188E). Mutations that cause familial lipoprotein lipase deficiency reduce or eliminate lipoprotein lipase activity, which prevents the enzyme from effectively breaking down triglycerides in the bloodstream. As a result, triglycerides attached to lipoproteins accumulate in the blood and tissues, leading to inflammation of the pancreas (pancreatitis), enlarged liver and spleen (hepatosplenomegaly), fatty deposits in the skin (eruptive xanthomas), and the other signs and symptoms of familial lipoprotein lipase deficiency.

More About This Health Condition

Other disorders

Certain variations in the LPL gene have been shown to influence the levels of fats in the bloodstream. The LPL gene variants likely result in the production of lipoprotein lipase enzymes with altered abilities to break down triglycerides. In some cases, the enzyme is overactive, resulting in low fat levels. In other cases, the enzyme is impaired, resulting in increased fat levels, a condition called hyperlipidemia. Individuals with hyperlipidemia are at greater than normal risk of developing atherosclerosis, a condition in which fatty deposits accumulate on artery walls. This fatty material hardens over time, eventually blocking the arteries and increasing the chance of having a heart attack or stroke. It is unclear how much of a role LPL gene variants play in the development of atherosclerosis, as a large number of genetic and environmental factors determine the risk of developing this complex condition.

Other Names for This Gene

  • clearing factor lipase
  • diacylglycerol lipase
  • LIPD
  • postheparin lipase
  • triacylglycerol protein acylhydrolase

Additional Information & Resources

Tests Listed in the Genetic Testing Registry

  • Tests of LPL From the National Institutes of Health

Scientific Articles on PubMed

  • PubMed From the National Institutes of Health

Catalog of Genes and Diseases from OMIM

  • HYPERLIPIDEMIA, FAMILIAL COMBINED, 3; FCHL3
  • LIPOPROTEIN LIPASE; LPL

Gene and Variant Databases

  • NCBI Gene From the National Institutes of Health
  • ClinVar From the National Institutes of Health

References

  • Benlian P, De Gennes JL, Foubert L, Zhang H, Gagne SE, Hayden M. Premature atherosclerosis in patients with familial chylomicronemia caused by mutations in the lipoprotein lipase gene. N Engl J Med. 1996 Sep 19;335(12):848-54. doi: 10.1056/NEJM199609193351203. Citation on PubMed
  • Gilbert B, Rouis M, Griglio S, de Lumley L, Laplaud P. Lipoprotein lipase (LPL) deficiency: a new patient homozygote for the preponderant mutation Gly188Glu in the human LPL gene and review of reported mutations: 75 % are clustered in exons 5 and 6. Ann Genet. 2001 Jan-Mar;44(1):25-32. doi: 10.1016/s0003-3995(01)01037-1. Citation on PubMed
  • Kersten S. Physiological regulation of lipoprotein lipase. Biochim Biophys Acta. 2014 Jul;1841(7):919-33. doi: 10.1016/j.bbalip.2014.03.013. Epub 2014 Apr 8. Citation on PubMed
  • Mead JR, Irvine SA, Ramji DP. Lipoprotein lipase: structure, function, regulation, and role in disease. J Mol Med (Berl). 2002 Dec;80(12):753-69. doi: 10.1007/s00109-002-0384-9. Epub 2002 Oct 24. Citation on PubMed
  • Mead JR, Ramji DP. The pivotal role of lipoprotein lipase in atherosclerosis. Cardiovasc Res. 2002 Aug 1;55(2):261-9. doi: 10.1016/s0008-6363(02)00405-4. No abstract available. Citation on PubMed
  • Pirim D, Wang X, Radwan ZH, Niemsiri V, Hokanson JE, Hamman RF, Barmada MM, Demirci FY, Kamboh MI. Lipoprotein lipase gene sequencing and plasma lipid profile. J Lipid Res. 2014 Jan;55(1):85-93. doi: 10.1194/jlr.M043265. Epub 2013 Nov 9. Citation on PubMed or Free article on PubMed Central
  • Tang W, Apostol G, Schreiner PJ, Jacobs DR Jr, Boerwinkle E, Fornage M. Associations of lipoprotein lipase gene polymorphisms with longitudinal plasma lipid trends in young adults: The Coronary Artery Risk Development in Young Adults (CARDIA) study. Circ Cardiovasc Genet. 2010 Apr;3(2):179-86. doi: 10.1161/CIRCGENETICS.109.913426. Epub 2010 Feb 11. Citation on PubMed or Free article on PubMed Central
DNA helix

Genomic Location

The LPL gene is found on chromosome 8.

Related Health Topics

  • Genes and Gene Therapy
  • Genetic Disorders

MEDICAL ENCYCLOPEDIA

  • Genes
  • Genetics

Understanding Genetics

  • What is DNA?
  • What is a gene?
  • What is a gene variant and how do variants occur?

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