Pinoresinol

Chemical compound From Wikipedia, the free encyclopedia

Pinoresinol is a tetrahydrofuran lignan[1] found in Styrax sp.,[2] Forsythia suspensa, and in Forsythia koreana.[3][4] It is also found in the caterpillar of the cabbage butterfly, Pieris rapae where it serves as a defence against ants.[5]

Quick facts Names, Identifiers ...
Pinoresinol
Chemical structure of pinoresinol
Chemical structure of pinoresinol
Names
IUPAC names
(+) form:
  • 4-[(3S,3aR,6S,6aR)-6-(4-hydroxy-3-methoxyphenyl)-1,3,3a,4,6,6a-hexahydrofuro[3,4-c]furan-3-yl]-2-methoxyphenol
  • (7α,7′α,8α,8′α)-3,3′-dimethoxy-7,9′:7′,9-diepoxylignane-4,4′-diol
Other names
(+)-Pinoresinol
(-)-Pinoresinol
Identifiers
3D model (JSmol)
ChEMBL
ChemSpider
KEGG
UNII
  • InChI=1S/C20H22O6/c1-23-17-7-11(3-5-15(17)21)19-13-9-26-20(14(13)10-25-19)12-4-6-16(22)18(8-12)24-2/h3-8,13-14,19-22H,9-10H2,1-2H3/t13-,14-,19+,20+/m0/s1 ☒N
    Key: HGXBRUKMWQGOIE-AFHBHXEDSA-N ☒N
  • InChI=1/C20H22O6/c1-23-17-7-11(3-5-15(17)21)19-13-9-26-20(14(13)10-25-19)12-4-6-16(22)18(8-12)24-2/h3-8,13-14,19-22H,9-10H2,1-2H3/t13-,14-,19+,20+/m0/s1
    Key: HGXBRUKMWQGOIE-AFHBHXEDBE
  • COC1=C(C=CC(=C1)C2C3COC(C3CO2)C4=CC(=C(C=C4)O)OC)O
Properties
C20H22O6
Molar mass 358.38 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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In food, it is found in sesame seed, in Brassica vegetables[6] and in olive oil.[7] Pinoresinol has also been found to be toxic to larvae of the milkweed bug Oncopeltus fasciatus and of the haematophagous insect Rhodnius prolixus, which is a vector of chagas disease.[8]

Currently, pinoresinol is isolated from plants with low efficiency and low yield.[9]

Biosynthesis

A first dirigent protein was discovered in Forsythia intermedia. This protein has been found to direct the stereoselective biosynthesis of (+)-pinoresinol from coniferyl alcohol monomers.[10] Recently, a second, enantiocomplementary dirigent protein was identified in Arabidopsis thaliana, which directs enantioselective synthesis of (-)-pinoresinol.[11]

(+)-Pinoresinol Biosynthesis
Reaction of monolignol radicals in the presence of dirigent protein to form (+)-pinoresinol
In the presence of dirigent protein from Forsythia intermedia, production of (+)-pinoresinol is greatly enriched while production of other products of dimerization is inhibited.

Pharmacology

Pinoresinol inhibits the enzyme α-glucosidase in vitro and may therefore act as a hypoglycemic agent.[12] A study involving extra virgin olive oil showed that pinoresinol possess in vitro chemoprevention properties. Increased apoptosis and cellular arrest at the G2/M stage in p53-proficient cells occurred.[13] Pinoresinol of olive oil decreases vitamin D intestinal absorption.[14]

Metabolism into enterolignans

Pinoresinol, along with other plant lignans, are converted into enterolignans by intestinal microflora in the human body.[15]

See also

References

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