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  5. 大葉骨碎補與姬蕨化學成分及活性評估之探討
 
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大葉骨碎補與姬蕨化學成分及活性評估之探討

Other Title
Chemical Investigation and Bioactivity of Davallia formosana Hayata and Hypolepis punctate (Thunb.) Mett
Type
thesis
Date Issued
2015-07-14
Author(s)
陳拯裕
Advisor
黃偉展
徐鳳麟
Subjects
系所名稱:藥學系(碩博士班)
Description
學位別:博士
語文別:中文
指導教授:黃偉展
共同指導教授:徐鳳麟
口試委員:李水盛;謝博軒;李美賢
中文關鍵字:大葉骨碎補;姬蕨;高尿酸血症;蝕骨細胞;葡萄糖攝入
英文關鍵字:Davallia formosana (Davalliaceae);Hypolepis punctata (Dennstaediaaceae);Hypouricemic;Osteoclastogenesis;Glucose uptake
Abstract
大葉骨碎補 (Davallia formosana Hayata)為骨碎補科 (Davalliaceae) 骨碎補屬 (Davallia),為民間常用治療骨科藥材之一。本研究探討大葉骨碎補之根部成分對高尿酸血症及抑制蝕骨細胞形成,從大葉骨碎補之根部分離出 20個化合物,包含2個新化合物: epiphyllocoumarin-3-O-β-D-allopyranoside (4)與8-(2-pyrro-lidinone-5-yl)-catechin-3-O-β-D-allopyranoside (5),及18個已知化合物。其中,化合5,7-dihydroxy-6-C-glucosy-chromone (1)、eriodictyol-6-C-β-D-glucopyranoside (2)、naringenin-6-C-β-D-glucopyranoside (3)、eriodicytyol-8-
C-β-D-glucopyranoside (10)、davallioside A (11)davallioside B (12)、caffeic acid-4-O-β-D-glucopyranoside (13)、p-coumaric acid-4-O-β-D-glucopyranoside (14)、protocatechuic acid (15)、4-hydroxy-3,5-dimethylbenzoic acid (16)、vanillic acid (17)及4-hydroxy-3-aminobenzoic acid (18)為從大葉骨碎補之根部首次所分離出之化合物。從體外活性評估實驗結果顯示,naringenin-6-C-
β-D-glucopyranoside (3) (IC50 57.4 M)與 epiphyllocoumarin-3-O-β-D-allopyranoside (4) (IC50 124 M)可抑制XOD之活性,並分別在小鼠動物模式中亦可降低血清尿酸濃度41.7 -46.0 %。另外,caffeic acid-4-O-β-D-glucopyranoside (13)、protocatehuic acid (15) 與 epicatechin (6)於10 μg/ml濃度下可抑制由RAKNL所誘導的蝕骨細胞形成。
姬蕨 (Hypolepis punctata (Thunb.) Mett.)屬於多年原生草本蕨類植物,為碗蕨科 (Dennstaediaaceae),姬蕨屬(Hyplepis)。從台灣產蕨類植物降血糖活性之篩選當中,姬蕨甲醇萃取物具有降血糖活性。經由姬蕨全草甲醇萃取物中,分離出23個化合物,包含3個新化合物: (+)-3-O-caffeoyl-L-glyceric acid (22)、(+)-3-O-p-coumaroyl-L-glyceric acid (23) 及quercetin-3-O-(3-O-acetyl-α-L-rhamnopyranosyl-(1→6))-β-D-glucopyranoside (38),及20個已知化合物,其中化合物(-)-4-O-caffeoyl-threonic acid (24)、chlorogenic acid (25)、6-O-p-coumaroyl-β-D-glucopyranoside (26)、coniferin (27)、lanicepside B (28)、lanicepside A (29)、quercetin (34)、quercetin-3-O-β-D-glucopyranoside (35)、kaempherol-3-O-β-D-glucopyranoside (36)與rutin (37),為姬蕨植物首次分離出之化合物。利用2-NBDG評估化合物是否對L6骨骼肌細胞有促進葡萄糖攝取效果,實驗結果顯示,化合物 lanicepside A (29)、 (-)-(7S,8R)-dihydro dehydrodiconiferyl alcohol 4-O-β-D-glucopyranoside (31)、(-)-isolariciresinol-4-O-β-D-glucopyranoside (32)、quercetin (34)與kaempherol-3-O-β-D-glucopyranoside (36)在濃度1 M劑量下,有促進L6細胞攝取葡萄糖。
本實驗從大葉骨碎補及姬蕨共分離出43個化合物,其中化合物4、5、22、23與38為新化合物。化合物(-)-epicatechin-3-O-β-D-allopyranoside (9)為大葉骨碎補主要成分,而pterosin A (39)為姬蕨主要成分。在高尿酸血症評估中,epiphyllocoumarin-3-O-β-D-allopyranoside (4)可能是透過抑制XOD,達到降低血清尿酸濃度。除此之外,在抑制蝕骨細胞形成之活性探討,以caffeic acid-4-O-β-D-glucopyranoside (13)效果最佳 (26.8%)。同時,在促進L6骨骼肌攝入葡萄糖初步篩選,以lanicepside A (29) (157%)及quercetin (34) (153%)效果相較其它化合物較佳,其中化合物29則為首次發現具有glucose uptake的促進效果。
URI
https://203.71.86.71/handle/123456789/57320

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