Changes

==Roles in the Body==

==Roles in the Body==

Thiamin (as TPP) is responsible for the decarboxylation of α-ketoacids and acyl-CoA derivatives during amino acid and glucose metabolism. The TPP-dependant enzyme transketolase is also involved in metabolism of glucose and ribose synthesis via the pentose phosphate pathway.  

Thiamin (as TPP) is responsible for the decarboxylation of α-ketoacids and aceyl-CoA derivatives during amino acid and glucose metabolism. The TPP-dependant enzyme transketolase is also involved in metabolism of glucose and ribose synthesis via the pentose phosphate pathway.  

Thiamin is one of the [[Nutrition Glossary#Essential Nutrients|essential nutrients]] involved with the clinical sequelae of refeeding syndrome<ref>Mehanna HM, et al. Refeeding syndrome: what it is, and how to prevent and treat it. BMJ 2008;336:1495-1498.</ref>. Refeeding syndrome can occurs when chronically starved animals are given a large bolus of readily absorbed carbohydrates without adequate amount of rate-limiting essential nutrients, specifically thiamin, [[Potassium - Nutrition|potassium]], and [[Magnesium - Nutrition|magnesium]]. The intracellular shift of these nutrients can cause rapid and profound clinical signs, leading to death if untreated.

Thiamin is one of the [[Nutrition Glossary#Essential Nutrients|essential nutrients]] involved with the clinical sequelae of refeeding syndrome<ref>Mehanna HM, et al. Refeeding syndrome: what it is, and how to prevent and treat it. BMJ 2008;336:1495-1498.</ref>. Refeeding syndrome can occurs when chronically starved animals are given a large bolus of readily absorbed carbohydrates without adequate amount of rate-limiting essential nutrients, specifically thiamin, [[Potassium - Nutrition|potassium]], and [[Magnesium - Nutrition|magnesium]]. The intracellular shift of these nutrients can cause rapid and profound clinical signs, leading to death if untreated.

==Diagnosing Thiamin Deficiency==

==Diagnosing Thiamin Deficiency==

Diagnosis of thiamine deficiency is based on measurement of low erythrocyte transketolase activity or low plasma thiamine phosphorylated esters serum [[Nutrition Glossary#Retinol|retinol]], though not routinely tested through veterinary reference laboratories. Submission of samples to a human reference laboratory may be possible, though often concurrent submission of normal reference samples is required. Magnetic resonance imaging (MRI) images show changes consistent with thiamine deficient grey matter degeneration.  

Diagnosis of thiamine deficiency is based on measurement of low [[Erythrocytes|erythrocyte]] transketolase activity or low plasma thiamine phosphorylated esters serum [[Nutrition Glossary#Retinol|retinol]], though not routinely tested through veterinary reference laboratories. Submission of samples to a human reference laboratory may be possible, though often concurrent submission of normal reference samples is required. Magnetic resonance imaging (MRI) images show changes consistent with thiamine deficient grey matter degeneration.  

 

Diagnosis is also made on clinical signs consistent with deficiency, evaluation of diet, and response to parenteral thiamine supplementation.

Diagnosis is also made on clinical signs consistent with deficiency, evaluation of diet, and response to parenteral thiamine supplementation.

==References==

==References==

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[[Category:Vitamins]]

[[Category:Vitamins]]