Chemistry:Pterostilbene

From HandWiki

Pterostilbene (/ˌtɛrəˈstɪlbiːn/) (trans-3,5-dimethoxy-4-hydroxystilbene) is a stilbenoid chemically related to resveratrol.[1] In plants, it serves a defensive phytoalexin role.[2]

Natural occurrence

Pterostilbene is found in almonds,[3] various Vaccinium berries (including blueberries[4][5][6]), grape leaves and vines.[2][7] It is also encountered in the xylem, particularly in the heartwood of Pterocarpus marsupium[5] as well as in other species of the Pterocarpus family, including Malay padauk, the Narra tree (Pterocarpus indicus), Muninga and African padauk (Pterocarpus erinaceus), thus contributing to the high natural durability as a known phytoalexin.[8]

Safety and regulation

Pterostilbene is considered to be a corrosive substance, is dangerous upon exposure to the eyes, and is an environmental toxin, especially to aquatic life.[1] A preliminary study of healthy human subjects given pterostilbene for 6–8 weeks, showed pterostilbene to be safe for human use at dosages up to 250 mg per day, although this study did not assess metabolic effects on the lipid profile.[9]

Other studies have reported dose-based elevations of low density lipoprotein cholesterol (LDL-C, "bad cholesterol") and decreased high density lipoprotein cholesterol (HDL-C, "good cholesterol") within 4 to 8 weeks of daily dosing.[10] The elevation of LDL-C may move previously normal ranges into borderline high or high reference range and has raised questions about the longterm cardiovascular risk of pterostilbene supplementation in humans.[10]

Its chemical relative, resveratrol, received FDA GRAS status in 2007,[11] and approval of synthetic resveratrol as a safe compound by the European Food Safety Authority (EFSA) in 2016.[12] Pterostilbene differs from resveratrol by exhibiting increased bioavailability (80% compared to 20% in resveratrol) due to the presence of two methoxy groups which cause it to exhibit increased lipophilic and oral absorption.[5]

Research

Pterostilbene is being studied in laboratory and preliminary clinical research.[1]

See also

  • Piceatannol, a stilbenoid related to both resveratrol and pterostilbene

References

  1. ↑ 1.0 1.1 1.2 "Pterostilbene, CID 5281727". PubChem, National Library of Medicine, US National Institutes of Health. 16 November 2019. https://pubchem.ncbi.nlm.nih.gov/compound/5281727. 
  2. ↑ 2.0 2.1 Langcake, P.; Pryce, R. J. (1977). "A new class of phytoalexins from grapevines". Experientia 33 (2): 151–2. doi:10.1007/BF02124034. PMID 844529. 
  3. ↑ "Characterisation of stilbenes in California almonds (Prunus dulcis) by UHPLC-MS". Food Chem 148 (Apr 1): 300–6. 2014. doi:10.1016/j.foodchem.2013.10.057. PMID 24262561. 
  4. ↑ "Pterostilbene's healthy potential". US Department of Agriculture, Online Magazine, Vol. 54, No. 11. 1 November 2006. https://agresearchmag.ars.usda.gov/2006/nov/health. 
  5. ↑ 5.0 5.1 5.2 McCormack, Denise; McFadden, David (2013). "A review of pterostilbene antioxidant activity and disease modification". Oxidative Medicine and Cellular Longevity 2013: 1–15. doi:10.1155/2013/575482. ISSN 1942-0900. PMID 23691264.   This article incorporates text available under the CC BY 3.0 license.
  6. ↑ "Resveratrol, pterostilbene, and piceatannol in vaccinium berries". J Agric Food Chem 52 (15): 4713–9. 2004. doi:10.1021/jf040095e. PMID 15264904. 
  7. ↑ "MALDI mass spectrometry imaging for the simultaneous location of resveratrol, pterostilbene and viniferins on grapevine leaves". Molecules 2013 (7): 10587–600. 2014. doi:10.3390/molecules190710587. PMID 25050857. 
  8. ↑ "Springer Handbook of Wood Science and Technology (Chapter 5. Wood Chemistry)". Springer Handbooks. Cham: Springer International Publishing. 2023. p. 263. doi:10.1007/978-3-030-81315-4. ISBN 978-3-030-81314-7. 
  9. ↑ "Metabolism and pharmacokinetics of resveratrol and pterostilbene". BioFactors 44 (1): 16–25. 2018. doi:10.1002/biof.1410. PMID 29315886. 
  10. ↑ 10.0 10.1 Brenner, C; Boileau, AC (October 13, 2018). "Pterostilbene raises low density lipoprotein cholesterol in people". Clinical Nutrition 38 (1): 480–481. doi:10.1016/j.clnu.2018.10.007. PMID 30482564. 
  11. ↑ "GRAS Notice GRN 224: Resveratrol". US Food and Drug Administration, Food Ingredient and Packaging Inventories. 1 August 2007. https://www.accessdata.fda.gov/scripts/fdcc/index.cfm?set=GRASNotices&id=224. 
  12. ↑ "Safety of synthetic trans‐resveratrol as a novel food pursuant to Regulation (EC) No 258/97". EFSA Journal (European Food Safety Authority, EFSA Panel on Dietetic Products, Nutrition and Allergies) 14 (1): 4368. 12 January 2016. doi:10.2903/j.efsa.2016.4368. 



Retrieved from "https://handwiki.org/wiki/index.php?title=Chemistry:Pterostilbene&oldid=4178104"