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Details on Person Acetoacetate, beta-hydroxybutyrate, and acetone collectively...
| Class:Id | Summation:74481 |
|---|---|
| _displayName | Acetoacetate, beta-hydroxybutyrate, and acetone collectively... |
| _timestamp | 2011-07-11 18:39:11 |
| created | [InstanceEdit:74482] Gopinathrao, G, 2003-07-23 10:32:00 |
| modified | [InstanceEdit:76562] Gopinathrao, G, 2003-10-10 10:53:18 [InstanceEdit:77107] Joshi-Tope, G, 2003-10-16 15:07:00 [InstanceEdit:77371] Joshi-Tope, G, 2003-10-19 14:58:00 [InstanceEdit:77453] Gopinathrao, G, 2007-03-20 09:37:59 [InstanceEdit:77509] Joshi-Tope, G, 2003-10-30 02:26:00 [InstanceEdit:177516] D'Eustachio, P, 2006-03-31 16:41:52 [InstanceEdit:1433611] D'Eustachio, P, 2011-07-11 |
| text | Acetoacetate, beta-hydroxybutyrate, and acetone collectively are called ketone bodies. The first two are synthesized from acetyl-CoA, in the mitochondria of liver cells; acetone is formed by spontaneous decarboxylation of acetoacetate. Ketone body synthesis in liver is effectively irreversible because the enzyme that catalyzes the conversion of acetoacetate to acetoacetyl-CoA is not present in liver cells. Ketone bodies, unlike fatty acids and triglycerides, are water-soluble. They are exported from the liver, and are taken up by other tissues, notably brain and skeletal and cardiac muscle. There, they are broken down to acetyl-CoA which is oxidized via the TCA cycle to yield energy. In a normal person, this pathway of ketone body synthesis and utilization is most active during extended periods of fasting. Under these conditions, mobilization and breakdown of stored fatty acids generates abundant acetyl-CoA acetyl-CoA in liver cells for synthesis of ketone bodies, and their utilization in other tissues minimizes the demand of these tissues for glucose (Sass 2011). |
| (summation) | [Pathway:74182] Ketone body metabolism [Homo sapiens] |
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