Effects of welsh onion extracts on human platelet function in vitro

Jia Huey Chen, Hsiun ing Chen, Jong Shyan Wang, Shun Jen Tsai, Chauying J. Jen*

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

37 Scopus citations


Welsh onion has been consumed for prevention of cardiovascular disorders. However, its underlying mechanisms are still unclear. This study investigated whether Welsh onion extracts can alter human platelet function (ie, platelet adhesion, aggregation, and thromboxane release). To clarify the underlying mechanisms, we also measured the intracellular calcium ([Ca2+](i)) and cyclic nucleotide levels in platelets. Our results showed that 1) boiled extracts directly induced platelet aggregation in a dose- dependent manner; 2) raw extracts inhibited platelet adhesion and ADP-evoked platelet aggregation, while boiled extracts enhanced them; 3) raw green extract suppressed ADP-stimulated platelet [Ca2+](i) elevation and thromboxane production, whereas boiled green extract enhanced them; 4) raw green extract elevated platelet cAMP level, whereas boiled green extract had no effect on cAMP level. Furthermore, the boiled green extract, but not the raw extract, induced pronounced platelet morphological changes. In conclusion, raw extracts of Welsh onion inhibit platelet function in vitro while boiled extracts activate platelets.

Original languageEnglish
Pages (from-to)1571-1579
Number of pages9
JournalLife Sciences
Issue number17
StatePublished - 17 03 2000


  • CAMP
  • Platelet adhesion
  • Platelet aggregation
  • Thromboxane
  • [Ca](i)


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