Chemistry:Genipin

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Genipin
Skeletal formula of genipin
Ball-and-stick model of the genipin molecule
Names
Preferred IUPAC name
Methyl (1R,4aS,7aS)-1-hydroxy-7-(hydroxymethyl)-1,4a,5,7a-tetrahydrocyclopenta[c]pyran-4-carboxylate
Identifiers
3D model (JSmol)
ChEMBL
ChemSpider
KEGG
UNII
Properties
C11H14O5
Molar mass 226.226 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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Genipin is a chemical compound found in Genipa americana fruit extract. It is an aglycone derived from an iridoid glycoside called geniposide which is also present in fruit of Gardenia jasminoides.[1]

Genipin is an excellent natural cross-linker for proteins, collagen, gelatin, and chitosan cross-linking. It has a low acute toxicity, with -1">50 i.v. 382 mg/kg in mice, therefore, much less toxic than glutaraldehyde and many other commonly used synthetic cross-linking reagents. Furthermore, genipin can be used as a regulating agent for drug delivery, as the raw material for gardenia blue pigment preparation, and as the intermediate for alkaloid syntheses.[2]

The blue color of genipin is stabilized in milk due to the natural pH of milk [3]

In vitro experiments have shown that genipin blocks the action of the transporter uncoupling protein 2.[4]

References

  1. Ramos-de-la-Peña, A.M.; Renard, C.M.G.C.; Montañez, J.; Reyes-Vega, M.L.; Contreras-Esquivel, J.C. (2014), "A review through recovery, purification and identification of genipin", Phytochemistry Reviews 15: 37–49, doi:10.1007/s11101-014-9383-z 
  2. Brenda Vaandering, Genipin, http://www.wou.edu/las/physci/ch350/Projects_2006/Vaandering/Genipin.htm, retrieved 22 December 2019 
  3. M.I.L. Neves, A. Valdés, E.K. Silva, M.A.A. Meireles, E. Ibáñez, A. Cifuentes (2022), "Study of the reaction between genipin and amino acids, dairy proteins, and milk to form a blue colorant ingredient", Food Research International 157: 111240, doi:10.1016/j.foodres.2022.111240, PMID 35761551, https://doi.org/10.1016/j.foodres.2022.111240, retrieved 9 December 2022 
  4. Zhang, CY; Parton, LE; Ye, CP; Krauss, S; Shen, R; Lin, CT; Porco Jr, JA; Lowell, BB (2006). "Genipin inhibits UCP2-mediated proton leak and acutely reverses obesity- and high glucose-induced beta cell dysfunction in isolated pancreatic islets". Cell Metabolism 3 (6): 417–27. doi:10.1016/j.cmet.2006.04.010. PMID 16753577.