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Thiamine deficiency is a medical condition of low levels of thiamine (vitamin B 1). [1] A severe and chronic form is known as beriberi. [1] [7] The name beriberi was possibly borrowed in the 18th century from the Sinhalese phrase බැරි බැරි (bæri bæri, “I cannot, I cannot”), owing to the weakness caused by the condition.
Korsakoff syndrome (KS) [1] is a disorder of the central nervous system characterized by amnesia, deficits in explicit memory, and confabulation.This neurological disorder is caused by a deficiency of thiamine (vitamin B 1) in the brain, and it is typically associated with and exacerbated by the prolonged, excessive ingestion of alcohol. [2]
The enzymes that are dependent on thiamine pyrophosphate are associated with the citric acid cycle (also known as the Krebs cycle), and catalyze the oxidation of pyruvate, α-ketoglutarate and branched chain amino acids. Thus, anything that encourages glucose metabolism will exacerbate an existing clinical or sub-clinical thiamine deficiency. [15]
Thiamine responsive megaloblastic anemia syndrome (also known as Rogers syndrome) is a very rare autosomal recessive genetic disorder affecting a thiamine transporter, which is characterized by megaloblastic anemia, diabetes mellitus, and hearing loss. The condition is treated with high doses of thiamine (vitamin B1).
Acquired immune deficiency syndrome AIP Acute intermittent porphyria: ALA DD Doss porphyria/ALA dehydratase deficiency/Plumboporphyria (the disease is known by multiple names) ALD Alcoholic liver disease: ALI Acute lung injury: ALL Acute lymphoblastic lymphoma, acute lymphocytic leukemia: ALS Amyotrophic lateral sclerosis: AMD Age-related ...
While its role is well-known, the non-coenzyme action of thiamine and derivatives may be realized through binding to proteins which do not use that mechanism. [21] No physiological role is known for the monophosphate except as an intermediate in cellular conversion of thiamine to the di- and triphosphates.
Niacin deficiency is a consequence of a diet low in both niacin and the amino acid tryptophan, a precursor for the vitamin. Low plasma tryptophan is a non-specific indicator, meaning it can have other causes. The signs and symptoms of niacin deficiency start to revert within days of oral supplementation with large amounts of the vitamin. [23] [24]
The Great Imitator (also the Great Masquerader) is a phrase used for medical conditions that feature nonspecific symptoms and may be confused with a number of other diseases. [1] The term connotes especially difficult differential diagnosis (DDx), increased potential for misdiagnosis , and the protean nature of some diseases.