Vicine

Last updated
Vicine
Vicin.svg
Names
IUPAC name
2,6-Diamino-5-(β-D-glucopyranosyloxy)pyrimidin-4(1H)-one
Systematic IUPAC name
2,6-Diamino-5-{[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}pyrimidin-4(1H)-one
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.005.283 OOjs UI icon edit-ltr-progressive.svg
PubChem CID
UNII
  • InChI=1S/C10H16N4O7/c11-7-6(8(19)14-10(12)13-7)21-9-5(18)4(17)3(16)2(1-15)20-9/h2-5,9,15-18H,1H2,(H5,11,12,13,14,19)/t2-,3-,4+,5-,9+/m1/s1 Yes check.svgY
    Key: KGNGTSCIQCLKEH-SYCVNHKBSA-N Yes check.svgY
  • InChI=1/C10H16N4O7/c11-7-6(8(19)14-10(12)13-7)21-9-5(18)4(17)3(16)2(1-15)20-9/h2-5,9,15-18H,1H2,(H5,11,12,13,14,19)/t2-,3-,4+,5-,9+/m1/s1
    Key: KGNGTSCIQCLKEH-SYCVNHKBBM
  • O=C2\N=C(\N)NC(=C2/O[C@@H]1O[C@@H]([C@@H](O)[C@H](O)[C@H]1O)CO)/N
Properties
C10H16N4O7
Molar mass 304.259 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
X mark.svgN  verify  (what is  Yes check.svgYX mark.svgN ?)

Vicine is an alkaloid glycoside found mainly in fava beans, which are also called broad beans ( Vicia faba). [1] Vicine is toxic in individuals who have a hereditary loss of the enzyme glucose-6-phosphate dehydrogenase. It causes haemolytic anaemia, called favism. The formation of vicine in Vicia faba has been studied, but this natural formation has not yet been found. [2] [3]

Contents

History

Vicine was initially isolated in 1870 from the seeds of Vicia sativa by a method of extraction with sulfuric acid and subsequent precipitation with mercury sulfate (HgSO4). Later vicine was also found in other Vicia species, namely Vicia faba, beet juice and peas. The chemical structure of the compound was built gradually. First the glycosidic nature of the compound was recognized in 1896. The same year the aglycone of vicine, divicine, was isolated. In the beginning of the 20th century the pyrimidine structure was recognized. Despite these initial successes, the correct formula of vicine was determined only in 1953 and it is 2,4-diamino-6-oxypyrimidine-5-(β-D-glucopyranoside). [2]

Metabolism

Vicine is an inactive compound in the body. When vicine enters the body through food, it is hydrolysed by the intestinal microflora to a highly reactive free radical generating compound, the aglycone divicine. [2] Upon hydrolysis, the glucose part of the molecule is split off and that results in the reduced divicine. Divicine is then taken up in the blood through the intestinal epithelium. [4] [5]

Adverse effects

Adverse effects almost solely occur in humans that suffer from glucose-6-phosphate dehydrogenase deficiency. This deficiency causes a shortage of glutathione in erythrocytes and glutathione is needed for the neutralization of ROS (reactive oxygen species) created by the strongly oxidizing agent divicine. [5] Glucose-6-phosphate dehydrogenase deficiency is a common genetic condition, with a global prevalence of approximately 4.9%, affecting over 400 million individuals worldwide. [5] [6] It is important to recognize that glucose-6-phosphate dehydrogenase deficiency can still be life-threatening if not promptly diagnosed and managed. Effective management often includes interventions as blood transfusions, but with appropriate care, full recovery from favism without lasting complications is the expected outcome. [7]

Indications

Persons with G6PD deficiency are asymptomatic. An attack of acute haemolytic anaemia can appear out of nowhere and can be very severe and life-threatening. Indications of such a sudden attack of favism are dark urine, pallor, jaundice, abdominal pain and in most cases fever. [5]

Toxicity

The β-glycosidic bond between glucose and the hydroxyl group at C5 on the pyrimidine ring are hydrolysed to yield the aglycone of vicine, divicine (2,6-diamino-4,5-dihydroxypyrimidine). [8] These aglycones have a strong oxidising capacity for glutathione. [9] In healthy individuals, this is not a problem, as glutathione can be reduced quickly enough to regenerate it. In individuals with a deficiency for glucose 6-phosphate dehydrogenase (G6PD) however, this results in haemolytic anaemia. [10]

Effects on animals

A 10 g vicine /kg diet in laying hens led to reduced feed intake, egg weight, haemoglobin levels and fertility and increased liver weights, liver glutathione levels and plasma lipid levels. A diet with comparable levels of vicine per kg in pigs showed only small effects on protein and energy digestibility. [11]

In another study, laying and broiler hens were fed grains that were soaked for different periods of time, which partly or totally removed vicine. Hens that had had grains with vicine still in them showed a significant decrease in corpuscular haemoglobin, while the others did not. [12]

An in vivo study in rats showed that oral administration of vicine resulted in only small reductions in glutathione concentrations and no mortality. Intraperitoneal administration however, led to a rapid decrease in glutathione followed by death because of anoxia. [13]

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<i>Vicia faba</i> Species of plant in the pea and bean family Fabaceae

Vicia faba, commonly known as the broad bean, fava bean, or faba bean, is a species of vetch, a flowering plant in the pea and bean family Fabaceae. It is widely cultivated as a crop for human consumption, and also as a cover crop. Varieties with smaller, harder seeds that are fed to horses or other animals are called field bean, tic bean or tick bean. Horse bean, Vicia faba var. equinaPers., is a variety recognized as an accepted name. This legume is very common in Southern European, Northern European, East Asian, Latin American and North African cuisines.

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Hemolytic anemia or haemolytic anaemia is a form of anemia due to hemolysis, the abnormal breakdown of red blood cells (RBCs), either in the blood vessels or elsewhere in the human body (extravascular). This most commonly occurs within the spleen, but also can occur in the reticuloendothelial system or mechanically. Hemolytic anemia accounts for 5% of all existing anemias. It has numerous possible consequences, ranging from general symptoms to life-threatening systemic effects. The general classification of hemolytic anemia is either intrinsic or extrinsic. Treatment depends on the type and cause of the hemolytic anemia.

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Vicia is a genus of over 240 species of flowering plants that are part of the legume family (Fabaceae), and which are commonly known as vetches. Member species are native to Europe, North America, South America, Asia and Africa. Some other genera of their subfamily Faboideae also have names containing "vetch", for example the vetchlings (Lathyrus) or the milk-vetches (Astragalus). The lentils are included in genus Vicia, and were formerly classified in genus Lens. The broad bean is sometimes separated in a monotypic genus Faba; although not often used today, it is of historical importance in plant taxonomy as the namesake of the order Fabales, the Fabaceae and the Faboideae. The tribe Vicieae in which the vetches are placed is named after the genus' current name. The true peas (Pisum) are among the closest living relatives of vetches.

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References

  1. ↑ Lattanzio V, Bianco VV, Crivelli G, Miccolis V (May 1983). "Variability of Amino Acids, Protein, Vicine and Convicine in Vicia faba (L) Cultivars". Journal of Food Science. 48 (3): 992–993. doi:10.1111/j.1365-2621.1983.tb14950.x.
  2. 1 2 3 Mager, J.; Razin, A.; Herschko, A. (2012) [1969]. "10. Favism". In Liener, I. (ed.). Toxic constituents of plant foodstuffs. Springer. pp. 293–312. ISBN   9780323147378.
  3. ↑ Khazaei, Hamid (September 2019). "Eliminating vicine and convicine, the main anti-nutritional factors restricting faba bean usage". Trends in Food Science & Technology. 91: 549–556. doi: 10.1016/j.tifs.2019.07.051 .
  4. ↑ Baker MA, Bosia A, Pescarmona G, Turrini F, Arese P (June 1984). "Mechanism of action of divicine in a cell-free system and in glucose-6-phosphate dehydrogenase-deficient red cells". Toxicologic Pathology. 12 (4): 331–6. doi:10.1177/019262338401200405. PMID   6099911. S2CID   26038580.
  5. 1 2 3 4 Luzzatto L, Arese P (January 2018). "Favism and Glucose-6-Phosphate Dehydrogenase Deficiency". The New England Journal of Medicine. 378 (1): 60–71. doi:10.1056/NEJMra1708111. PMID   29298156.
  6. ↑ Khazaei, Hamid; Purves, Randy W.; Hughes, Jessa; Link, Wolfgang; O'Sullivan, Donal M.; Schulman, Alan H.; Björnsdotter, Emilie; Geu-Flores, Fernando; Nadzieja, Marcin; Andersen, Stig U.; Stougaard, Jens; Vandenberg, Albert; Stoddard, Frederick L. (2019-09-01). "Eliminating vicine and convicine, the main anti-nutritional factors restricting faba bean usage". Trends in Food Science & Technology. 91: 549–556. doi: 10.1016/j.tifs.2019.07.051 . ISSN   0924-2244.
  7. ↑ Reading, N. Scott; Sirdah, Mahmoud M.; Shubair, Mohammad E.; Nelson, Benjamin E.; Al-Kahlout, Mustafa S.; Al-Tayeb, Jamal M.; Aboud, Lina N.; Shaban, Maysaa Abu; Luzzatto, Lucio; Prchal, Josef T. (2016-09-01). "Favism, the commonest form of severe hemolytic anemia in Palestinian children, varies in severity with three different variants of G6PD deficiency within the same community". Blood Cells, Molecules and Diseases. 60: 58–64. doi:10.1016/j.bcmd.2016.07.001. ISSN   1079-9796. PMID   27519946.
  8. ↑ Rizzello CG, Losito I, Facchini L, Katina K, Palmisano F, Gobbetti M, Coda R (August 2016). "Degradation of vicine, convicine and their aglycones during fermentation of faba bean flour". Scientific Reports. 6 (1): 32452. Bibcode:2016NatSR...632452R. doi:10.1038/srep32452. PMC   5006014 . PMID   27578427.
  9. ↑ Mager J, Glaser G, Razin A, Izak G, Bien S, Noam M (July 1965). "Metabolic effects of pyrimidines derived from fava bean glycosides on human erythrocytes deficient in glucose-6-phosphate dehydrogenase". Biochemical and Biophysical Research Communications. 20 (2): 235–40. doi:10.1016/0006-291x(65)90352-9. PMID   5850686.
  10. ↑ Pulkkinen M, Zhou X, Lampi AM, Piironen V (December 2016). "Determination and stability of divicine and isouramil produced by enzymatic hydrolysis of vicine and convicine of faba bean". Food Chemistry. 212: 10–9. doi:10.1016/j.foodchem.2016.05.077. PMID   27374500.
  11. ↑ Jezierny D, Mosenthin R, Bauer E (May 2010). "The use of grain legumes as a protein source in pig nutrition: A review". Animal Feed Science and Technology. 157 (3–4): 111–128. doi:10.1016/j.anifeedsci.2010.03.001.
  12. ↑ Farran MT, Darwish AH, Uwayjan MG, Sleiman FT, Ashkarian VM (June 2002). "Vicine and convicine in common vetch (Vicia sativa) seeds enhance beta-cyanoalanine toxicity in male broiler chicks". International Journal of Toxicology. 21 (3): 201–9. doi:10.1080/10915810290096333. PMID   12055021. S2CID   21101425.
  13. ↑ Arbid MS, Koriem KM, Asaad GF, Megahed HA (2013). "Effect of the antibiotic neomycin on the toxicity of the glycoside vicine in rats". Journal of Toxicology. 2013: 913128. doi: 10.1155/2013/913128 . PMC   3694484 . PMID   23840205.
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