hypoglycin a/vomiting

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Isovaleric and -methylbutyric acidemias induced by hypoglycin A: mechanism of Jamaican vomiting sickness.

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Hypoglycin A, the causative agent of the Jamaican vomiting sickness, produced a marked increase in concentration of isovaleric acid in the plasma of rats, when administered in a single dose. alpha-Methylbutyric acid, a position isomer, also accumulated. The use of hypoglycin A reproduced some

Jamaican vomiting sickness. Biochemical investigation of two cases.

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We identified methylenecyclopropylacetic acid, a known metabolite of hypoglycin A, in the urine of two patients with Jamaican vomiting sickness. Excretion of unusual dicarboxylic acids such as 2-ethylmalonic, 2-methylsuccinic, glutaric, adipic and dicarboxylic acids with eight and 10 carbon chains

A validated method for quantifying hypoglycin A in whole blood by UHPLC-HRMS/MS.

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Hypoglycin A (HGA) is the toxic principle in ackee (Blighia sapida Koenig), a nutritious and readily available fruit which is a staple of the Jamaican working-class and rural population. The aril of the unripe fruit has high concentrations of HGA, the cause of Jamaican vomiting sickness, which is

Hypoglycin A: a specific inhibitor of isovaleryl CoA dehydrogenase.

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Evidence is presented for the specific in vivo and in vitro inhibition of isovaleryl CoA dehydrogenation by hypoglycin A and its derivative, alpha-ketomethylenecyclopropylpropionic acid. alpha-Methylbutyryl CoA dehydrogenation was also impaired, but the degree of inhibition was much lower.

Effect of hypoglycin A on insulin release.

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Thirty experimental and fifteen control Wistar rats were studied to determine whether hypoglycin A influences insulin levels in the body to contribute to the state of hypoglycemia usually observed in Jamaican vomiting sickness, a condition arising after ingestion of unripe ackees. This fruit also

Quantification of metabolites for assessing human exposure to soapberry toxins hypoglycin A and methylenecyclopropylglycine.

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Ingestion of soapberry fruit toxins hypoglycin A and methylenecyclopropylglycine has been linked to public health challenges worldwide. In 1976, over 100 years after Jamaican vomiting sickness (JVS) was first reported, the cause of JVS was linked to the ingestion of the toxin hypoglycin A produced

Quantification of hypoglycin A and methylenecyclopropylglycine in human plasma by HPLC-MS/MS.

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Hypoglycin A (HGA) and methylenecyclopropylglycine (MCPG) are naturally-occurring amino acids known to cause hypoglycemia and encephalopathy. Exposure to one or both toxins through the ingestion of common soapberry (Sapindaceae) fruits are documented in illness outbreaks throughout the world.

Ackee (Blighia sapida) hypoglycin A toxicity: dose response assessment in laboratory rats.

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Hypoglycin A, the toxin found in the ackee fruit, has been reported in the literature as the causative agent in incidences of acute toxicity termed Jamaican vomiting sickness or toxic hypoglycemic syndrome. Hypoglycin A toxicity in this study was determined by feeding male and female Sprague-Dawley

Identification of ethylmalonic acid in urine of two patients with the vomitting sickness of Jamaica.

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Large amounts of ethylmalonic acid have been identified in urines from two patients with the vomitting sickness of Jamaica. The amounts were 178 and 882 mug per mg creatinine which are 70 and 350 times, respectively, over control values. Other short and medium chain dicarboxylic acids including

Hypoglycin stimulates insulin secretion.

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Hypoglycin A(0.01--1.0 mmol/l) stimulated insulin release from pieces of rabbit pancreas in vitro in the presence or absence of extracellular glucose. The relevance of this finding to the hypoglycaemia of Jamaican vomiting sickness is discussed.

Plasma and urine amino acid changes in rats treated with hypoglycin.

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Hypoglycin A is a toxin which causes Jamaican vomiting sickness. In rats treated with this compound, we observed significant increases in a number of amino acids in the plasma and the urine, and detected several unidentified amino compounds in the urine. These changes suggest that hypoglycin, in

Synthesis of beta-cyclopropylalanines by photolysis of diacyl peroxides.

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[reaction: see text] Photolysis at 254 nm of neat (no solvent) unsymmetrical diacyl peroxides derived from cyclopropane carboxylic acids and l-aspartic acid generates protected beta-cyclopropylalanines in reasonable yields. Orthogonally protected 3-(trans-2-aminocyclopropyl)alanine (21), a key

Blighia sapida K.D. Koenig: A review on its phytochemistry, pharmacological and nutritional properties.

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Ackee plant (Blighia sapida K. D. Koenig) (Sapindaceae) is used in Sub-Saharan Africa (where it has its origin) and in different parts of the world (The Caribbean, North and South America, Europe). Traditionally it is used to manage numerous ailments like backache, constipation,

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