* * *lac·tase de·fi·cien·cy (lakґtās) the most common disaccharidase deficiency, reduced or absent lactase activity in the intestinal mucosa, usually due to an inherited defect in the enzyme but sometimes secondary to disorders involving the small intestinal mucosa. The hereditary adult form, an autosomal recessive trait, is the normal state in most populations other than white Northern Europeans and may be characterized by abdominal pain, flatulence, and diarrhea after ingestion of milk (lactose intolerance); the rare hereditary congenital form (congenital lactose intolerance), an autosomal recessive trait, is characterized by diarrhea, vomiting, and failure to thrive.
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lactase deficiency — noun congenital disorder consisting of an inability to digest milk and milk products; absence or deficiency of lactase results in an inability to hydrolyze lactose • Syn: ↑lactose intolerance, ↑milk intolerance • Hypernyms: ↑genetic disease,… … Useful english dictionary
Lactase persistence — is the continued activity of the enzyme lactase in adulthood. Since lactase s only function is the digestion of lactose in milk, in most mammalian species the activity of the enzyme is dramatically reduced after weaning. However in some human… … Wikipedia
Deficiency, lactase — Not enough of an enzyme called lactase in the small intestine to digest lactose, a prominent component of milk and most other dairy products. Lactose is sometimes also used as an ingredient in other foods, so anyone with lactase deficiency should … Medical dictionary
Lactase — Enzyme that breaks down the milk sugar lactose into glucose and galactose. Persons with a deficiency of lactase in the gut can develop abdominal cramping and diarrhea after ingesting milk products. * * * SYN: β d galactosidase. * * * lac·tase lak … Medical dictionary
Lactase — Protein Name=Lactase Symbol=LCT AltSymbols=LAC; LPH; LPH1 HGNCid=6530 Chromosome=2 Arm=q Band=21 LocusSupplementaryData= ECnumber=18.104.22.168 OMIM=603202 EntrezGene=3938 RefSeq=NM 002299 UniProt=P09848 Lactase (LCT), a part of the β galactosidase… … Wikipedia
deficiency — An insufficient quantity of some substance (as in dietary d. or hemoglobin d. in marrow aplasia); organization (as in mental d.); activity (as in enzyme d. or reduced oxygen carrying capacity of the blood), etc., of which the amount present is of … Medical dictionary
disaccharidase deficiency — less than normal activity of disaccharidases of the intestinal mucosa. It usually denotes a generalized deficiency of all such enzymes secondary to a disorder of the small intestine, which clinically may be manifest only as a deficiency of… … Medical dictionary
Galactose-1-phosphate uridylyltransferase deficiency — Classification and external resources Galactose ICD 10 E … Wikipedia
Lactose intolerance — Classification and external resources Lactose (disaccharide of β D galactose β D glucose) is normally split by lactase. ICD 10 … Wikipedia
Lactose intolerance — Inability to digest lactose, a component of milk and most other dairy products. Lactose is sometimes also used as an ingredient in other foods, so those with a lactase deficiency should check labels carefully. The basis for this condition is lack … Medical dictionary