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Cudrania Tricuspidata root extract (CTE) has an anti-platelet effect via cGMP-dependent VASP phosphorylation in human platelets

꾸지뽕나무 뿌리 추출물의 cGMP에 의한 VASP 인산화 기전을 통한 항혈소판 효과

  • Ro, Ju-Ye (Department of Biomedical Laboratory Science, Konyang University) ;
  • Cho, Hyun-Jeong (Department of Biomedical Laboratory Science, Konyang University)
  • 노주예 (건양대학교 의과학대학 임상병리학과) ;
  • 조현정 (건양대학교 의과학대학 임상병리학과)
  • Received : 2019.10.31
  • Accepted : 2019.12.06
  • Published : 2019.12.31

Abstract

Cudrania tricuspidata has been reported to have many biological activities, including anti-inflammatory, anti-cancer, and antioxidant properties. However, the effects of C. tricuspidata root extract (CTE) on human platelet aggregation induced by collagen as well as the signaling pathways involved remain unknown. In the present study, we investigated the effect of CTE on human platelets. CTE inhibited platelet aggregation via down-regulation of thromboxane A2 (TXA2) by blocking cyclooxygenase-1 (COX-1) activity and intracellular Ca2+ mobilization in collagen-induced platelets. CTE also reduced the phosphorylation of phospholipase C (PLC) γ2 and syk. CTE regulated platelet aggregation via cyclic guanosine monophosphate (cGMP)-dependent phosphorylation of vasodilator-stimulated phosphoprotein (VASP) Ser239. In addition, administration of CTE (50 and 100 mg/kg) significantly reduced hyper-aggregated platelet aggregation by collagen (5 ㎍/mL) without hepatotoxicity in HFD (high fat diet)-fed rats. Taken together, these results suggest that CTE has anti-platelet effects both in vitro and in vivo. Therefore, CTE may be an effective therapeutic and preventive agent for cardiovascular disease, and is a safe and natural product.

꾸지뽕나무 뿌리 추출물은 항염, 항암, 항산화와 같은 효과를 갖는 많은 생리활성 물질을 포함하고 있다고 알려져 있다. 그러나 꾸지뽕나무 뿌리 추출물(이하 CTE)의 사람 혈소판 응집 억제 기전에 관하여는 알려진 바 없다. 본 연구에서는 CTE가 혈소판에 미치는 영향을 확인하고자 하였다. CTE는 collagen으로 유도한 혈소판 응집 반응에서 cyclooxygenase-1 활성을 억제하고, 세포 내 칼슘 농도를 낮추는 방식으로 thromboxane A2 생성을 억제하였다. 또한, phospholipase Cγ2와 syk의 인산화 반응을 억제하였으며, guanosine monophosphate (cGMP)에 의존적인 방식으로 vasodilator-stimulated phosphoprotein(VASP)의 Ser239 위치를 인산화하여 항혈소판 효과를 나타내었다. 또한, 고지방 식이로 혈소판 활성화를 유도한 랫드에서 CTE를 경구 투여 하였을 때, 간독성 없이 콜라겐으로 유도한 혈소판 응집반응을 thromboxane A2 생성을 억제함으로써 항혈소판 효과를 보였다. 이는 in vivo와 in vitro에서 같은 결과를 제시하고 있다. 결론적으로, CTE는 항혈소판 작용 및 심혈관계 질환 예방을 위한 천연물 유래의 안전하고, 새로운 물질임을 제시하는 바이다.

Keywords

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