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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]
Thiamine (vitamin B 1) is an essential coenzyme in carbohydrate metabolism and is also a regulator of osmotic gradient. Its deficiency may cause swelling of the intracellular space and local disruption of the blood-brain barrier. Brain tissue is very sensitive to changes in electrolytes and pressure and edema can be cytotoxic.
Thiamine deficiency and errors of thiamine metabolism are believed to be the primary cause of Wernicke encephalopathy. Thiamine, also called B 1, helps to break down glucose. Specifically, it acts as an essential coenzyme to the TCA cycle and the pentose phosphate shunt. Thiamine is first metabolised to its more active form, thiamine ...
BTRBGD, [1] Biotin-responsive basal ganglia disease (BBGD), [2] Thiamine metabolism dysfunction syndrome 2 (biotin or thiamine-responsive type) (THMD2), [3] Thiamine-responsive encephalopathy, Thiamine transporter-2 deficiency [4] Specialty: Neurometabolic disorders, neurology, internal medicine: Symptoms
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]
Transketolase activity decreases due to thiamine deficiency, generally due to malnutrition. Several diseases are associated with thiamine deficiency, including beriberi , biotin-thiamine-responsive basal ganglia disease (BTBGD) , [ 5 ] Wernicke–Korsakoff syndrome , and others (see thiamine for a comprehensive listing).
The presence of thiaminases counter the production of thiamine by breaking them down, resulting in a futile cycle between rumen microbes and thiaminases. Eventually, when the rate of synthesis production can not exceed thiaminase intake, a state of thiamine deficiency will be reached.
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