Geraniin

Geraniin
Chemical structure of geraniin
Chemical structure of geraniin
Names
IUPAC name
(1R,7R,8S,26R,28S,29R,38R)-1,13,14,15,18,19,20,34,35,39,39-Undecahydroxy-2,5,10,23,31-pentaoxo-6,9,24,27,30,40-hexaoxaoctacyclo[34.3.1.04,38.07,26.08,29.011,16.017,22.032,37]tetraconta-3,1 1,13,15,17,19,21,32,34,36-decaen-28-yl 3,4,5-trihydroxybenzoate
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
KEGG
  • InChI=1S/C41H28O27/c42-13-1-8(2-14(43)24(13)48)34(54)67-39-33-32-30(64-38(58)12-6-19(47)41(61)40(59,60)23(12)22-11(37(57)66-33)5-17(46)27(51)31(22)68-41)18(63-39)7-62-35(55)9-3-15(44)25(49)28(52)20(9)21-10(36(56)65-32)4-16(45)26(50)29(21)53/h1-6,18,23,30,32-33,39,42-46,48-53,59-61H,7H2/t18-,23+,30-,32+,33-,39+,41+/m1/s1
    Key: JQQBXPCJFAKSPG-SVYIMCMUSA-N
  • Oc1cc(cc(O)c1O)C(=O)O[C@@H]9O[C@@H]7COC(=O)c2cc(O)c(O)c(O)c2c3c(O)c(O)c(O)cc3C(=O)O[C@@H]8[C@H]9OC(=O)c4cc(O)c(O)c5O[C@@]6(O)C(=O)/C=C(\[C@@H](c45)C6(O)O)C(=O)O[C@H]78
Properties
C41H28O27
Molar mass 952.64 g/mol
Density 2.26 g/mL
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Geraniin is a dehydroellagitannin found in geraniums. It is found for instance in Geranium thunbergii, which is one of the most popular folk medicines and also an official antidiarrheic drug in Japan. It can also be found in the rind of Nephelium lappaceum (rambutan).

It mediates apoptosis by cleavage of focal adhesion kinase through up-regulation of Fas ligand expression in human melanoma cells.

Geraniin has also been shown to possess immunomodularity properties, as it inhibits tumor necrosis factor-alpha, and NF-κB in ovarian cancer cells.

Geraniin was studied for its anticancer activity and shown to target apoptosis via inactivation of PI3K/Akt/mTOR signaling pathway involving NF-κB when treated against HT-29 human colorectal adenocarcinoma cells.

It is formed with one hexahydroxydiphenic acid unit, one modified hexahydroxydiphenic acid unit (dehydrohexahydroxydiphenic acid or DHHDP) and one gallic acid unit linked to a glucose molecule. It is forming an equilibrium mixture of six-membered hemi-ketal and five-membered hemi-ketal forms.[citation needed]

Chebulagic acid is formed from geraniin through a glutathione-mediated conversion.

References

  1. 1 2 Lee, Jang-Chang; Tsai, Chih-Yen; Kao, Jung-Yie; Kao, Ming-Ching; Tsai, Shih-Chang; Chang, Chih-Shiang; Huang, Li-Jiau; Kuo, Sheng-Chu; et al. (2008). "Geraniin-mediated apoptosis by cleavage of focal adhesion kinase through up-regulation of Fas ligand expression in human melanoma cells". Molecular Nutrition & Food Research. 52 (6): 655–63. doi:10.1002/mnfr.200700381. PMID 18435487.
  2. ↑ Luger, P.; Weber, M.; Kashino, S.; Amakura, Y.; Yoshida, T.; Okuda, T.; Beurskens, G.; Dauter, Z. (1998). "Structure of the Tannin Geraniin Based on Conventional X-ray Data at 295 K and on Synchrotron Data at 293 and 120 K". Acta Crystallographica Section B. 54 (5): 687. Bibcode:1998AcCrB..54..687L. doi:10.1107/S0108768198000081.
  3. ↑ Rapid isolation of geraniin from Nephelium lappaceum rind waste and its anti-hyperglycemic activity. Uma D. Palanisamy, Lai Teng Ling, Thamilvaani Manaharan, and David Appleton, Food Chemistry, 1 July 2011, Volume 127, Issue 1, Pages 21–27, doi:10.1016/j.foodchem.2010.12.070
  4. ↑ Wang X, et al. Geraniin suppresses ovarian cancer growth through inhibition of NF-κB activation and downregulation of Mcl-1 expression. J Biochem Mol Toxicol. 2017 Sep;31(9)
  5. ↑ Chan, Chim Kei; Tang, Liu Ying; Goh, Bey Hing; Abdul Kadir, Habsah (2019). "Targeting apoptosis via inactivation of PI3K/Akt/MTOR signaling pathway involving NF-κB by geraniin in HT-29 human colorectal adenocarcinoma cells". Progress in Drug Discovery & Biomedical Science. 2. doi:10.36877/pddbs.a0000030.
  6. ↑ Glutathione-mediated conversion of the ellagitannin geraniin into chebulagic acid. Tanaka T, Kouno I and Nonaka G.I, Chemical and pharmaceutical bulletin, 1996, volume 44, no 1, pages 34-40, INIST 3003361