DOI: 10.11931/guihaia.gxzw202309012
張馨予, 羅日措, 王洪玲, 等, 2024.
藏藥黃帚橐吾化學(xué)成分及抗炎活性研究 [J].
廣西植物, 44(6): 1017-1027.
ZHANG XY, LUO RC, WANG HL, et al., 2024.
Chemical constituents and anti-inflammatory activity from Ligularia virgaurea [J].
Guihaia, 44(6 ): 1017-1027.
摘" 要:" 黃帚橐吾(Ligularia virgaurea)為藏藥“日肖”的基原植物之一,具有清熱解毒、干黃水功效。為探究黃帚橐吾抗炎活性成分,該研究采用硅膠柱色譜、凝膠柱色譜、ODS反相柱色譜等進(jìn)行分離純化,通過(guò)各種波譜學(xué)方法對(duì)化合物進(jìn)行結(jié)構(gòu)鑒定,并采用脂多糖(LPS)誘導(dǎo)的RAW264.7細(xì)胞模型測(cè)定化合物對(duì)一氧化氮(NO)的抑制活性。結(jié)果表明:(1)從黃帚橐吾石油醚和正丁醇部位共分離得到21個(gè)化合物,分別鑒定為spiroeuryolide(1)、cacalol acetate(2)、oplopenone(3)、8-ethyl-palmosalide A(4)、1-hydroxy-3,7-dimethyl-2-(pent-3-enyl) benzofuran(5)、丁香脂素-O-β-D-葡萄糖苷(6)、松脂酚-O-β-D-葡萄吡喃糖苷(7)、isoeucommin A(8)、eucommin A(9)、6,7-二甲氧基香豆素(10)、阿魏酸(11)、咖啡酸乙酯(12)、咖啡酸甲酯(13)、阿魏酸甲酯(14)、阿魏酸乙酯(15)、咖啡酸(16)、2-[(2′E)-3′,7′-dimethyl-2′,6′-octadienyl]-4-methoxy-6-methylphenol(17)、2,8-dimethyl-6-methoxy-2-(4′-methylpent-3′-enyl)-chromene(18)、β-谷甾醇(19)、dodecyl(Z)-9-hexadecenoate(20)、hexacosanal(21)。其中,化合物1-4、6、11-16、18、20、21為首次從黃帚橐吾中分離得到。(2)體外抗炎實(shí)驗(yàn)表明,化合物1-3、6、11-16、17、19在檢測(cè)濃度下(1.56 ~ 50.00 μmol·L-1)均能顯著抑制NO釋放量(Plt;0.05或Plt;0.01),化合物5在濃度為50.00 μmol·L-1時(shí)對(duì)NO的釋放量無(wú)抑制作用,但在12.50、25.00 μmol·L-1的濃度下,對(duì)NO的釋放量有抑制作用(Plt;0.05)。該研究結(jié)果豐富了黃帚橐吾的化學(xué)成分和生物活性研究,為黃帚橐吾抗炎活性的開(kāi)發(fā)和利用提供了理論基礎(chǔ)。
關(guān)鍵詞: 黃帚橐吾, 倍半萜, 化學(xué)成分, 結(jié)構(gòu)鑒定, 抗炎活性
中圖分類號(hào):" Q946
文獻(xiàn)標(biāo)識(shí)碼:" A
文章編號(hào):" 1000-3142(2024)06-1017-11
收稿日期: 2023-12-28
接受日期: 2024-01-26
基金項(xiàng)目:" 國(guó)家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2019YFC1712300); 國(guó)家自然科學(xué)基金(31660098); 江西省教育廳科技項(xiàng)目(GJJ201215)。
第一作者: 張馨予(1995—),碩士研究生,主要從事中藥及民族藥藥效物質(zhì)基礎(chǔ)研究,(E-mail)1947774835@qq.com。
*通信作者:" 王洪玲,博士,副教授,主要從事中藥及民族藥藥效物質(zhì)基礎(chǔ)研究,(E-mail)centurymaomao2008@163.com。
Chemical constituents and anti-inflammatory
activity from Ligularia virgaurea
ZHANG Xinyu1, LUO Ricuo1, WANG Hongling1*, LIANG Wenjuan2
( 1. Research Center of Chinese Medicine Resource and National Medicine, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004,
China; 2. College of Food Science and Technology, Yunnan Agricultural of University, Kunming 650201, China )
Abstract:" Ligularia virgaurea is one of the original plants of the Tibetan medicine “Rixiao” for the treatment of clearing heat and removing yellow water. In order to study the chemical constituents and anti-inflammatory activity of L. virgaurea, the compounds were separated by silica gel, Sephadex LH-20 gel, ODS gel column chromatography and other column chromatography technologies. The structures of all isolates were identified by spectroscopic methods (NMR and HR-ESI-MS). Their inhibitory activity of the compounds on nitric oxide (NO) was determined by lipopolysaccharide (LPS)-induced RAW264.7 cell model. The results were as follows: (1) Twenty-one compounds were separated and identified from petroleum ether and n-butanol extracts of L. virgaurea, including spiroeuryolide (1), cacalol acetate (2), oplopenone (3), 8-ethyl-palmosalide A (4), 1-hydroxy-3,7-dimethyl-2-(pent-3-enyl)benzofuran (5), syringaresinol-O-β-D-glucopyranoside (6), pinoresinol-O-β-D-glucopyranoside (7), isoeucommin A (8), eucommin A (9), 6,7-dimethoxycoumarin (10), ferulic acid (11), ethyl caffeate (12), methyl caffeate (13), methyl ferulate (14), ethyl ferulate (15), caffeic acid (16), 2-[(2′E)-3′,7′-dimethyl-2′,6′-octadienyl]-4-methoxy-6-methylphenol (17), 2,8-dimethyl-6-methoxy-2-(4′-methylpent-3′-enyl)-chromene (18), β-sitosterol (19), dodecyl(Z)-9-hexadecenoate (20) and hexacosanal (21). Compounds 1-4, 6, 11-16, 18, 20, 21 were isolated from the whole herbs of L. virgaurea for the first time. (2) The anti-inflammatory activity in vitro showed that compounds 1-3, 6, 11-16, 17, 19 could significantly inhibited releases of NO at concentration ranging from 1.56 to 50.00 μmol·L-1 (Plt;0.05 or Plt;0.01), Compound 5 had no inhibitory effect on the release of NO at a concentration of 50.00 μmol·L-1, but it could inhibit releases of NO at concentrations of 12.50, 25.00 μmol·L-1 (Plt;0.05). This finding enriches the chemical constituent and biological activity research of L. virgaurea and provides a certain theoretical reference for the future development and utilization of its anti-inflammatory activity.
Key words: Ligularia virgaurea, sesquiterpenes, chemical constituent, structural identification, anti-inflammatory activity
黃帚橐吾(Ligularia virgaurea)為菊科橐吾屬多年生草本植物,是藏藥“日肖”的基原植物之一,收載于《中華人民共和國(guó)衛(wèi)生部藥品標(biāo)準(zhǔn)·藏藥》(1995版)和《青海省藏藥標(biāo)準(zhǔn)》(1992版)中,主要分布于我國(guó)西藏東北部、云南西北部、四川、青海、甘肅等地,以全草入藥,具有清宿熱、解毒愈瘡、干黃水(青海省衛(wèi)生廳,1992)、祛風(fēng)濕(劉守金等,2006)等功效。文獻(xiàn)報(bào)道黃帚橐吾乙醇提取物對(duì)結(jié)痂病菌具有抑制作用(Luo et al., 2015),其化學(xué)結(jié)構(gòu)類型為倍半萜類、木脂素類、甾體類、苯丙素類等(Wu et al., 2004; Wu et al., 2005a,b; Zhang et al., 2007; Dong et al., 2015; Tori, 2016; Qi et al., 2017; Nakashima et al., 2018; Saito et al., 2019),其中倍半萜化合物為主要成分,并且文獻(xiàn)報(bào)道部分倍半萜和苯丙素化合物具有一定的抗炎活性(郭立敏等,2018; 廖佳慧等,2023)。本課題組前期從黃帚橐吾乙酸乙酯部位分離得到12個(gè)化合物(王曉云等, 2022),為了進(jìn)一步研究黃帚橐吾抗炎活性成分,本研究從黃帚橐吾石油醚部位和正丁醇部位分離鑒定出21個(gè)化合物,其中化合物1-4、6、11-16、18、20、21為首次從黃帚橐吾中分離得到,發(fā)現(xiàn)13個(gè)潛在的抗炎活性成分,為黃帚橐吾的開(kāi)發(fā)與利用提供一定的化學(xué)和藥理學(xué)基礎(chǔ)。
1" 儀器與材料
核磁共振波譜儀AX-600型(德國(guó)Bruker公司);高效液相色譜儀Waters e2695型(美國(guó)Waters公司);Eclipse XD-C18分析型色譜柱(250 mm × 4.6 mm, 5 μm,美國(guó)安捷倫科技有限公司);高效液相色譜儀Agilent 1260型(美國(guó)安捷倫科技有限公司);ZORBAXSB-C18半制備型色譜柱(250 mm × 9.4 mm, 5 μm,美國(guó)安捷倫科技有限公司);高分辨質(zhì)譜儀Triple TOF56型(HR-QTOF-MS,美國(guó)AB SCIEX公司);恒溫CO2培養(yǎng)箱(2014-88759,新加坡Esco有限公司);Rotavator R-210旋轉(zhuǎn)蒸發(fā)儀(瑞士BUCHI公司);MultiskanGo全波長(zhǎng)酶標(biāo)儀(美國(guó)Thermo Fisher Scientific公司)。
Sephadex LH-20(瑞士Amersham Pharmacia公司);GF254薄層色譜硅膠(煙臺(tái)華陽(yáng)新材料有限公司);ODS反相硅膠(日本Fuji株式會(huì)社);Nitric Oxide Detection Kit檢測(cè)試劑盒(上海碧云天生物科技有限公司);Cell Counting Kit-8試劑盒(大連美侖生物科技有限公司);RAW264.7小鼠單核巨噬細(xì)胞(中國(guó)科學(xué)院細(xì)胞庫(kù)型培養(yǎng)標(biāo)本庫(kù));色譜甲醇(美國(guó)TEDIA有限公司);氘代試劑(美國(guó)Cambridge Isotope Laboratories, Inc公司);有機(jī)試劑(西隴化學(xué)有限公司); DMEM高糖培養(yǎng)基、胎牛血清FBS(美國(guó)Gibco Life Technologies公司)。
黃帚橐吾于2020年8月采自四川甘孜,由鐘國(guó)躍研究員鑒定為菊科橐吾屬植物黃帚橐吾(Ligularia virgaurea)的干燥全草,標(biāo)本(20200801)存放于江西中醫(yī)藥大學(xué)中藥資源與民族藥研究中心。
2" 方法
2.1 提取和分離
取5.0 kg干燥的黃帚橐吾藥材用75%乙醇提取2次,合并濃縮得總浸膏,分別用石油醚、乙酸乙酯以及正丁醇進(jìn)行萃取(王曉云等, 2022),得到石油醚部位(Fr.1)、乙酸乙酯部位(Fr.2)、正丁醇部位(Fr.3)和水部位(Fr.4)。石油醚部位Fr.1(73.8 g)經(jīng)硅膠柱色譜,用石油醚-乙酸乙酯(100∶2~7∶3,V/V)洗脫,得到6個(gè)組分(Fr.1-1~Fr.1-6)。Fr.1-2(12.4 g)經(jīng)硅膠柱色譜,用石油醚-二氯甲烷(9∶1~7∶3,V/V)進(jìn)行洗脫,再通過(guò)Sephadex LH-20柱色譜(甲醇)以及ODS反相柱色譜(甲醇-水6∶4~9∶1,V/V)等分離手段,得到化合物3(32.0 mg)、18(37.2 mg)、20(21.3 mg)、21(24.3 mg)。Fr.1-3(9.2 g)經(jīng)硅膠柱色譜,用石油醚-二氯甲烷(7∶3~5∶5,V/V)進(jìn)行洗脫,再經(jīng)過(guò)ODS反相柱色譜(甲醇-水4∶6~7∶3,V/V)和Sephadex LH-20柱色譜(甲醇)等分離手段,得到化合物1(42.8 mg)、2(21.4 mg)、4(8.7 mg)、5(48.6 mg)、10(12.3 mg)、17(10.2 mg)。
正丁醇部位Fr.3(159.1 g)經(jīng)硅膠柱色譜,用二氯甲烷-甲醇(100∶5~8∶2,V/V)洗脫后得到6個(gè)組分(Fr.3-1~Fr.3-6)。Fr.3-1(10.1 g)經(jīng)硅膠柱色譜,用石油醚-乙酸乙酯(100∶1~6∶4,V/V)洗脫,再通過(guò)Sephadex LH-20柱色譜(甲醇)和ODS反相柱色譜(甲醇-水4∶6~8∶2,V/V)等分離手段,得到化合物14(34.7 mg)、15(45.1 mg)、19(107.1 mg)。Fr.3-2(6.0 g)經(jīng)硅膠柱色譜,用石油醚-乙酸乙酯(8∶2~5∶5,V/V)進(jìn)行洗脫,再經(jīng)過(guò)Sephadex LH-20柱色譜(甲醇),得到化合物11(48.0 mg),然后經(jīng)安捷倫半制備液相色譜,以甲醇-水(37∶63,V/V,228 nm)作為流動(dòng)相,得到化合物12(10.8 mg,tR = 32.4 min)、13(50.1 mg,tR = 40.6 min)。Fr.3-4(5.6 g)經(jīng)ODS反相硅膠色譜柱分離,用甲醇-水(1∶9~5∶5,V/V)進(jìn)行洗脫,然后經(jīng)硅膠柱色譜和Sephadex LH-20柱色譜(甲醇)等分離手段,得到化合物6(73.2 mg)、7(8.6 mg)、8(5.9 mg)、9(3.4 mg)。Fr.3-5(6.1 g)經(jīng)ODS反相硅膠柱色譜,用甲醇-水(1∶9~5∶5,V/V)洗脫得到化合物16(20.0 mg)。
2.2 抗炎活性評(píng)價(jià)
檢測(cè)化合物1-3、5、6、11-16、17、19對(duì)小鼠RAW264.7細(xì)胞的毒性。將對(duì)數(shù)生長(zhǎng)期的RAW264.7細(xì)胞接種到96孔板(每孔3 × 104個(gè)),固定條件下培養(yǎng)24 h,棄掉上層培養(yǎng)基,并將實(shí)驗(yàn)分為空白組、對(duì)照組、給藥組,每孔設(shè)置4個(gè)復(fù)孔,給藥組加入含有不同濃度藥物(6.25~100.00 μmol·L-1)的新培養(yǎng)基,處理后,加入CCK-8溶液,孵育30 min,于450 nm波長(zhǎng)處測(cè)吸光度,根據(jù)郭敏俠等(2022)的方法計(jì)算細(xì)胞存活率,進(jìn)而確定化合物的安全濃度。
將對(duì)數(shù)期的RAW264.7細(xì)胞接種到96孔板中,密度為每孔3 × 104個(gè),并將實(shí)驗(yàn)分為空白組、模型組、甲氨蝶呤組、給藥組,每孔設(shè)置4個(gè)復(fù)孔,培養(yǎng)24 h后,將舊培養(yǎng)基棄去,除空白組只加入培養(yǎng)基外,其余各組均加入濃度為1.00 μg·mL-1的LPS進(jìn)行造模。培養(yǎng)箱培育1 h,取出后,給藥組根據(jù)細(xì)胞毒性的測(cè)定結(jié)果加入不同濃度的藥物(1.56~50.00 μmol·L-1),甲氨蝶呤組加入甲氨蝶呤(0.06 μmol·L-1),模型組和空白組加入新鮮培養(yǎng)基,培養(yǎng)箱培養(yǎng)24 h后,將96孔板取出,并將樣品上層的培養(yǎng)基(每孔50 μL)轉(zhuǎn)移至新的96孔板中,避光依次加入(每孔50 μL)Griess A和B試劑,于540 nm波長(zhǎng)處測(cè)吸光度,計(jì)算NO濃度。
3" 結(jié)果與分析
3.1 結(jié)構(gòu)鑒定
化合物1-21的結(jié)構(gòu)式見(jiàn)圖1。
化合物1" 淡黃色油狀物,分子式為C15H18O2, ESI-MS m/z: 231.1" [M+H]+。1H-NMR (600 MHz, Methanol-d4) δH: 6.52 (1H, d, J = 1.4 Hz, H-6), 5.69 (1H, s, H-9), 2.23 (1H, m, H-4), 2.07 (3H, s, H-14), 2.06~1.94 (5H, m, H-1,
2, 3α), 1.90 (3H, s, H-13), 1.71 (1H, m, H-3β), 0.76 (3H, d, J = 7.1 Hz, H-15); 13C-NMR (150 MHz, Methanol-d4) δC: 38.6 (C-1), 25.4 (C-2), 35.4 (C-3), 48.9 (C-4), 156.2 (C-5), 117.3 (C-6), 144.6 (C-7), 147.8 (C-8), 119.2 (C-9), 57.5 (C-10), 112.8 (C-11), 174.5 (C-12), 7.8 (C-13), 23.5 (C-14), 14.1 (C-15)。以上數(shù)據(jù)與文獻(xiàn)(黃帥等, 2013)報(bào)道基本一致,因此鑒定為spiroeuryolide。
化合物2" 白色固體, 分子式為C17H20O3, ESI-MS m/z: 273.1" [M+H]+。1H-NMR (600 MHz, Chloroform-d) δH: 7.23 (1H, d, J = 1.4 Hz, H-12), 3.27~3.22 (1H, m, H-4), 2.85~2.81 (1H, m, H-1α), 2.57 (3H, s, H-14), 2.39 (3H, s, H-17), 2.37 (3H, d, J = 1.4 Hz, H-15), 1.91~1.75 (4H, m, H-2, 3), 1.19 (3H, d, J = 7.1 Hz, H-13); 13C-NMR (150 MHz, Chloroform-d) δC: 23.6 (C-1), 16.7 (C-2), 30.1 (C-3), 29.1 (C-4), 125.1 (C-5), 135.6 (C-6), 127.2 (C-7), 145.3 (C-8), 131.5 (C-9), 127.0 (C-10), 116.9 (C-11), 141.6 (C-12), 11.4 (C-13), 14.4 (C-14), 20.7 (C-15), 168.9 (C-16), 21.5 (C-17)。以上數(shù)據(jù)與文獻(xiàn)(Arellano et al., 2018)報(bào)道基本一致,因此鑒定為cacalol acetate。
化合物3" 黃色固體, 分子式為C15H24O, ESI-MS m/z: 221.2" [M+H]+。1H-NMR (600 MHz, Chloroform-d) δH: 4.63 (1H, m, H-10α), 4.53 (1H, m, H-10β), 2.70~2.66 (1H, m, H-3), 2.35~2.32 (1H, m, H-7β), 2.15 (3H, s, H-15), 1.10~1.03 (1H, m, H-6β), 0.87 (3H, d, J = 6.9 Hz, H-12), 0.62 (3H, d, J = 6.9 Hz, H-13); 13C-NMR (150 MHz, Chloroform-d) δC: 27.4 (C-1), 28.6 (C-2), 56.1 (C-3), 52.1 (C-4), 49.3 (C-5), 26.6 (C-6), 35.3 (C-7), 150.9 (C-8), 51.8 (C-9), 103.6 (C-10), 29.6 (C-11), 22.0 (C-12), 15.7 (C-13), 211.7 (C-14), 29.0 (C-15)。以上數(shù)據(jù)與文獻(xiàn)(Joseph-Nathan et al., 1989)報(bào)道基本一致,因此鑒定為oplopenone。
化合物4" 淡黃色油狀,分子式為C17H24O3, ESI-MS m/z: 277.2" [M+H]+。1H-NMR (600 MHz, Chloroform-d) δH: 5.57 (1H, m, H-1), 3.47~3.42 (1H, m, H-16α), 3.27~3.22 (1H, m, H-16β), 2.85 (1H, d, J = 14.3 Hz, H-9α), 2.74 (1H, d, J = 13.0 Hz, H-6α), 2.44~2.40 (1H, m, H-9β), 2.16 (1H, m, H-2α), 2.03 (1H, m, H-2β), 1.95 (1H, d, J = 13.0 Hz, H-6β), 1.89 (3H, d, J = 1.5 Hz, H-13), 1.73~1.67 (1H, m, H-4), 1.48~1.41 (2H, m, H-3), 1.16 (3H, t, J = 7.0 Hz, H-17), 1.00 (3H, d, J = 7.0 Hz, H-14), 0.82 (3H, s, H-15); 13C-NMR (150 MHz, Chloroform-d) δC: 126.2 (C-1), 25.8 (C-2), 27.1 (C-3), 40.5 (C-4), 41.2 (C-5), 37.5 (C-6), 158.2 (C-7), 106.2 (C-8), 44.0 (C-9), 136.4 (C-10), 124.6 (C-11), 172.1 (C-12), 8.2 (C-13), 15.9 (C-14), 17.9 (C-15), 58.7 (C-16), 15.4 (C-17)。以上數(shù)據(jù)與文獻(xiàn)(Wiemer et al.,1990)報(bào)道基本一致,因此鑒定為8-ethyl-palmosalide A。
化合物5" 淡黃色固體,分子式為C15H18O2, ESI-MS m/z: 231.1" [M+H]+。1H-NMR (600 MHz, Chloroform-d) δH: 7.26 (1H, d, J = 1.3 Hz, H-8), 6.85 (1H, s, H-4), 5.56~5.45 (2H, m, H-13, 14), 2.77 (2H, t, J = 7.3 Hz, H-11), 2.36 (3H, s, H-10), 2.15 (3H, d, J = 1.3 Hz, H-9), 1.63 (3H, d, J = 6.1 Hz, H-15); 13C-NMR (150 MHz, Chloroform-d) δC: 138.8 (C-1), 122.9 (C-2), 131.9 (C-3), 111.9 (C-4), 127.7 (C-5), 142.7 (C-6), 116.2 (C-7), 140.8 (C-8), 8.0 (C-9), 20.1 (C-10), 26.8 (C-11), 32.6 (C-12), 131.3 (C-13), 125.4 (C-14), 18.1 (C-15)。以上數(shù)據(jù)與文獻(xiàn)(Liu et al., 2007; Sun et al., 2007)報(bào)道基本一致,因此鑒定為1-hydroxy-3,7-dimethyl-2-(pent-3-enyl) benzofuran。
化合物6" 白色粉末,分子式為C28H36O13, ESI-MS m/z: 603.0" [M+Na]+。1H-NMR (600 MHz, Pyridine-d5) δH: 7.00 (2H, s, H-1, 1′), 6.98 (2H, s, H-5, 5′), 5.02 (2H, br s, H-7, 7′), 4.35 (4H, m, H-9, 9′), 3.86 (6H, s, H-10, 10′), 3.84 (6H, s, H-11, 11′), 3.31~3.24 (2H, m, H-8, 8′); 13C-NMR (150 MHz, Pyridine-d5) δC: 132.1 (C-1), 105.0 (C-2), 154.0 (C-3), 138.4 (C-4), 154.0 (C-5), 105.0 (C-6), 86.6 (C-7), 55.0 (C-8), 72.3 (C-9), 56.6 (C-10), 56.8 (C-11), 130.2 (C-1′), 104.8 (C-2′), 149.3 (C-3′), 137.3 (C-4′), 149.3 (C-5′), 104.8 (C-6′), 86.3 (C-7′), 54.9 (C-8′), 72.2 (C-9′), 56.6 (C-10′), 56.8 (C-11′), 104.9 (C-1″), 76.1 (C-2″), 78.4 (C-3″), 71.6 (C-4″), 78.7 (C-5″), 62.4 (C-6″)。以上數(shù)據(jù)與文獻(xiàn)(劉科蘭等,2016)報(bào)道基本一致,因此鑒定為丁香脂素-O-β-D-葡萄糖苷。
化合物7" 白色粉末,分子式為C26H32O11, ESI-MS m/z: 543.0" [M+Na]+。1H-NMR (600 MHz, Methanol-d4) δH: 7.14 (1H, d, J = 8.3 Hz, H-5), 7.03 (1H, d, J = 1.8 Hz, H-2), 6.95 (1H, d, J = 1.5 Hz, H-2′), 6.91 (1H, dd, J = 8.3, 1.8 Hz, H-6), 6.81 (1H, dd, J = 8.1, 1.5 Hz, H-6′), 6.77 (1H, d, J = 8.1 Hz, H-5′), 4.75 (1H, d, J = 4.4, H-7), 4.71 (1H, d, J = 4.0 Hz, H-7′), 4.25~4.21 (2H, m, H-9, 9′), 3.87 (3H, s, H-10), 3.85 (3H, s, H-10′), 3.12 (2H, m, H-8, 8′); 13C-NMR (150 MHz, Methanol-d4) δC: 137.4 (C-1), 111.6 (C-2), 147.5 (C-3), 150.9 (C-4), 118.0 (C-5), 120.0 (C-6), 87.1 (C-7), 55.5 (C-8), 72.7 (C-9), 56.7 (C-10), 133.7 (C-1′), 111.0 (C-2′), 147.3 (C-3′), 149.1 (C-4′), 116.1 (C-5′), 119.8 (C-6′), 87.5 (C-7′), 55.3 (C-8′), 72.7 (C-9′), 56.4 (C-10′), 102.8 (C-1″), 74.9 (C-2″), 78.0 (C-3″), 71.3 (C-4″), 77.8 (C-5″), 62.5 (C-6″)。以上數(shù)據(jù)與文獻(xiàn)(張彥龍等,2008)報(bào)道基本一致,因此鑒定為松脂酚-O-β-D-葡萄吡喃糖苷。
化合物8" 白色粉末,分子式為C27H34O12, ESI-MS m/z: 573.0" [M+Na]+。1H-NMR (600 MHz, Methanol-d4) δH: 7.15 (1H, d, J = 7.8 Hz, H-5), 7.04 (1H, br s, H-2), 6.93 (1H, br d, J = 7.8 Hz, H-6), 6.66 (2H, s, H-2′, 6′), 4.77~4.72 (2H, overlap, H-7, 7′), 4.27~4.25 (2H, m, H-9β, 9′β), 3.88 (3H, s, H-10), 3.85 (6H, s, H-11, 12), 3.14 (2H, m, H-8, 8′); 13C-NMR (150 MHz, Methanol-d4) δC: 133.1 (C-1), 104.5 (C-2), 149.3 (C-3), 137.5 (C-4), 149.3 (C-5), 104.5 (C-6), 87.6 (C-7), 55.5 (C-8), 72.7 (C-9), 56.8 (C-10), 56.8 (C-11), 56.7 (C-12), 136.2 (C-1′), 111.6 (C-2′), 151.0 (C-3′), 147.5 (C-4′), 118.0 (C-5′), 119.8 (C-6′), 87.1 (C-7′), 55.5 (C-8′), 72.8 (C-9′), 102.8 (C-1″), 74.9 (C-2″), 77.8 (C-3″), 71.3 (C-4″), 78.2 (C-5″), 62.5 (C-6″)。以上數(shù)據(jù)與文獻(xiàn)(南澤東等,2015)報(bào)道基本一致,因此鑒定為isoeucommin A。
化合物9" 白色粉末,分子式為C27H34O12, ESI-MS m/z: 573.0" [M+Na]+。1H-NMR (600 MHz, Methanol-d4) δH: 6.96~6.73 (5H, overlap, H-2, 2′, 5′, 6, 6′), 4.76~4.71 (2H, overlap, H-7, 7′), 4.29~4.24 (2H, m, H-9β, 9′β), 3.86 (9H, s, H-10, 11, 12), 3.30~3.14 (2H, m, H-8, 8′); 13C-NMR (150 MHz, Methanol-d4) δC: 135.6 (C-1), 104.8 (C-2, 6), 154.4 (C-3, 5), 139.6 (C-4), 87.4 (C-7), 55.4 (C-8), 72.9 (C-9), 57.1 (C-10, 11), 56.4 (C-12), 133.7 (C-1′), 111.0 (C-2′), 149.1 (C-3′), 147.3 (C-4′), 116.1 (C-5′), 120.1 (C-6′), (C-7′), 55.8 (C-8′), 72.7 (C-9′), 105.3 (C-1″), 75.7 (C-2″), 77.8 (C-3″), 71.3 (C-4″), 78.3 (C-5″), 62.6 (C-6″)。以上數(shù)據(jù)與文獻(xiàn)(南澤東等,2015)報(bào)道基本一致,因此鑒定為eucommin A。
化合物10" 無(wú)色針狀晶體(二氯甲烷),分子式為C11H10O4, ESI-MS m/z: 207.1" [M+H]+。1H-NMR (600 MHz, Chloroform-d) δH: 7.88 (1H, d, J = 9.4 Hz, H-4), 7.13 (1H, s, H-5), 6.97 (1H, s, H-8), 6.26 (1H, d, J = 9.4 Hz, H-3), 3.92 (3H, s, H-11), 3.88 (3H, s, H-12); 13C-NMR (150 MHz, Chloroform-d) δC: 163.8 (C-2), 113.5 (C-3), 145.9 (C-4), 109.9 (C-5), 148.1 (C-6), 154.7 (C-7), 100.9 (C-8), 151.2 (C-9), 113.0 (C-10), 56.9 (C-11), 56.8 (C-12)。以上數(shù)據(jù)與文獻(xiàn)(肖炳坤等,2005)報(bào)道基本一致,因此鑒定為6,7-二甲氧基香豆素。
化合物11" 淡黃色固體,分子式為C10H10O4, ESI-MS m/z: 217.0" [M+Na]+。1H-NMR (600 MHz, Methanol-d4) δH: 7.60 (1H, d, J = 15.9 Hz, H-7), 7.20 (1H, d, J = 2.0 Hz, H-2), 7.07 (1H, dd, J = 8.2, 2.0 Hz, H-6), 6.81 (1H, d, J = 8.2 Hz, H-5), 6.31 (1H, d, J = 15.9 Hz, H-8), 3.90 (3H, s, H-12); 13C-NMR (150 MHz, Methanol-d4) δC: 127.8 (C-1), 116.4 (C-2), 150.5 (C-3), 149.4 (C-4), 115.9 (C-5), 124.0 (C-6), 146.9 (C-7), 111.7 (C-8), 171.0 (C-9), 56.4 (C-10)。以上數(shù)據(jù)與文獻(xiàn)(Shen et al., 2010)報(bào)道基本一致,因此鑒定為阿魏酸。
化合物12" 白色粉末,分子式為C11H12O4, ESI-MS m/z: 231.0" [M+Na]+。1H-NMR (600 MHz, Methanol-d4) δH: 7.54 (1H, d, J = 15.9 Hz, H-7), 7.04 (1H, d, J = 2.0 Hz, H-2), 6.95 (1H, dd, J = 8.1, 2.0 Hz, H-6), 6.78 (1H, d, J = 8.1 Hz, H-5), 6.25 (1H, d, J = 15.9 Hz, H-8), 4.22 (2H, q, J = 7.1 Hz, H-1′), 1.31 (3H, t, J = 7.1 Hz, H-2′); 13C-NMR (150 MHz, Methanol-d4) δC: 127.7 (C-1), 115.1 (C-2), 146.8 (C-3), 149.5 (C-4), 116.5 (C-5), 122.9 (C-6), 146.7 (C-7), 115.2 (C-8), 169.3 (C-9), 61.4 (C-1′), 14.6 (C-2′)。以上數(shù)據(jù)與文獻(xiàn)(戴忠等,2006)報(bào)道基本一致,因此鑒定為咖啡酸乙酯。
化合物13" 白色粉末,分子式為C10H10O4, ESI-MS m/z: 217.0" [M+Na]+。1H-NMR (600 MHz, Methanol-d4) δH: 7.55 (1H, d, J = 15.9 Hz, H-7), 7.04 (1H, d, J = 2.0 Hz, H-2), 6.95 (1H, dd, J = 8.2, 2.0 Hz, H-6), 6.78 (1H, d, J = 8.2 Hz, H-5), 6.27 (1H, d, J = 15.9 Hz, H-8), 3.76 (3H, s, H-10); 13C-NMR (150 MHz, Methanol-d4) δC: 127.7 (C-1), 114.8 (C-2), 146.9 (C-3), 149.6 (C-4), 116.5 (C-5), 122.9 (C-6), 146.8 (C-7), 115.1 (C-8), 169.7 (C-9), 52.0 (C-10)。以上數(shù)據(jù)與文獻(xiàn)(Prevost et al., 2013)報(bào)道基本一致,因此鑒定為咖啡酸甲酯。
化合物14" 白色粉末,分子式為C11H12O4, ESI-MS m/z: 231.0" [M+Na]+。1H-NMR (600 MHz, Methanol-d4) δH: 7.61 (1H, d, J = 15.8 Hz, H-7), 7.18 (1H, d, J = 2.0 Hz, H-2), 7.08 (1H, dd, J = 8.2, 2.0 Hz, H-6), 6.82 (1H, d, J = 8.2 Hz, H-5), 6.37 (1H, d, J = 15.8 Hz, H-8), 3.89 (3H, s, H-10), 3.77 (3H, s, H-11); 13C-NMR (150 MHz, Methanol-d4) δC: 126.3 (C-1), 110.3 (C-2), 147.9 (C-3), 149.2 (C-4), 115.1 (C-5), 122.7 (C-6), 145.4 (C-7), 113.8 (C-8), 168.3 (C-9), 55.0 (C-10), 50.6 (C-11)。以上數(shù)據(jù)與文獻(xiàn)(Karakousi et al., 2020)報(bào)道基本一致,因此鑒定為阿魏酸甲酯。
化合物15" 白色粉末,分子式為C12H14O4, ESI-MS m/z: 223.0" [M+H]+。1H-NMR (600 MHz, Methanol-d4) δH: 7.60 (1H, d, J = 15.9 Hz, H-7), 7.18 (1H, d, J = 2.0 Hz, H-2), 7.07 (1H, dd, J = 8.2, 2.0 Hz, H-6), 6.82 (1H, d, J = 8.2 Hz, H-5), 6.35 (1H, d, J = 15.9 Hz, H-8), 4.23 (2H, q, J = 7.1 Hz, H-10), 3.90 (3H, s, H-12), 1.32 (3H, t, J = 7.1 Hz, H-11); 13C-NMR (150 MHz, Methanol-d4) δC: 127.7 (C-1), 115.6 (C-2), 149.3 (C-3), 150.5 (C-4), 116.4 (C-5), 124.0 (C-6), 146.6 (C-7), 111.7 (C-8), 169.2 (C-9), 61.4 (C-10), 14.6 (C-11), 56.4 (C-12)。以上數(shù)據(jù)與文獻(xiàn)(孫志國(guó)等,2018)報(bào)道基本一致,因此鑒定為阿魏酸乙酯。
化合物16" 淺黃色固體,分子式為C9H10O4, ESI-MS m/z: 183.0" [M+H]+。1H-NMR (600 MHz, Methanol-d4) δH: 7.49 (1H, d, J = 15.8 Hz, H-7), 6.99 (1H, d, J = 2.0 Hz, H-2), 6.88 (1H, dd, J = 8.2, 2.0 Hz, H-6), 6.73 (1H, d, J = 8.2 Hz, H-5), 6.17 (1H, d, J = 15.8 Hz, H-8); 13C-NMR (150 MHz, Methanol-d4) δC: 127.8 (C-1), 115. 1 (C-2), 146.8 (C-3), 149.4 (C-4), 116.5 (C-5), 122. 8 (C-6), 147.0 (C-7), 115.6 (C-8), 171.1 (C-9)。以上數(shù)據(jù)與文獻(xiàn)(林建斌等,2016)報(bào)道基本一致,因此鑒定為咖啡酸。
化合物17" 黃色油狀物,分子式為C18H26O2, ESI-MS m/z: 275.2" [M+H]+。1H-NMR (600 MHz, Chloroform-d) δH: 6.58 (1H, d, J = 3.0 Hz, H-5), 6.53 (1H, d, J = 3.0 Hz, H-3), 5.30 (1H, t, J = 7.2 Hz, H-2′), 5.07 (1H, t, J = 6.5 Hz, H-6′), 4.80 (1H, br s, OH), 3.74 (3H, s, H-8), 3.33 (2H, d, J = 7.2 Hz, H-1′), 2.22 (3H, s, H-7), 2.15~2.07 (4H, overlap, H-4′, 5′), 1.78 (3H, s, H-10′), 1.69 (3H, s, H-8′), 1.60 (3H, s, H-9′); 13C-NMR (150 MHz, Chloroform-d) δC: 146.9 (C-1), 125.6 (C-2), 113.1 (C-3), 153.2 (C-4), 114.2 (C-5), 127.4 (C-6), 16.4 (C-7), 55.8 (C-8), 30.7 (C-1′), 121.8 (C-2′), 138.9 (C-3′), 39.8 (C-4′), 26.5 (C-5′), 123.9 (C-6′), 132.2 (C-7′), 25.8 (C-8′), 17.9 (C-9′), 16.3 (C-10′)。以上數(shù)據(jù)與文獻(xiàn)(Resch et al., 2001)報(bào)道基本一致,因此鑒定為2-[(2′E)-3′,7′-dimethyl-2′,6′-octadienyl]-4-methoxy-6-methylphenol。
化合物18" 淡黃色油狀物,分子式為C18H24O2, ESI-MS m/z: 273.2" [M+H]+。1H-NMR (600 MHz, Chloroform-d) δH: 6.57 (1H, d, J = 2.9 Hz, H-7), 6.40 (1H, d, J = 2.9 Hz, H-5), 6.30 (1H, d, J = 9.8 Hz, H-3), 5.59 (1H, d, J = 9.8 Hz, H-2), 5.12 (1H, t, J = 7.2 Hz, H-3′), 3.74 (3H, s, H-11), 2.18 (3H, s, H-10), 1.68 (3H, s, H-5′), 1.59 (3H, s, H-6′), 1.38 (3H, s, H-7′); 13C-NMR (150 MHz, Chloroform-d) δC: 77.8 (C-1), 130.7 (C-2), 121.2 (C-3), 123.2 (C-4), 108.9 (C-5), 153.0 (C-6), 116.2 (C-7), 126.3 (C-8), 145.1 (C-9), 15.7 (C-10), 55.7 (C-11), 40.98 (C-1′), 22.8 (C-2′), 124.4 (C-3′), 131.7 (C-4′), 25.8 (C-5′), 17.7 (C-6′), 26.1 (C-7′)。以上數(shù)據(jù)與文獻(xiàn)(Capon et al., 1981; Resch et al., 1998)報(bào)道基本一致,因此鑒定為2,8-dimethyl-6-methoxy-2-(4′-methylpent-3′-enyl)-chromene。
化合物19" 白色粉末,分子式為C29H50O, ESI-MS m/z: 415.4" [M+H]+。1H-NMR (600 MHz, Chloroform-d) δH: 5.32 (1H, t, J = 2.8 Hz, H-6), 2.28~2.18 (1H, m, H-2α), 2.05~1.93 (1H, m, H-12α), 1.85~1.80 (2H, m, H-7), 1.68~1.62 (3H, overlap, H-1α, 2β, 25), 1.55~1.40 (3H, m, H-8, 15), 1.35 (5H, m, H-11, 20, 22), 1.28 (4H, m, H-16, 28), 1.25 (2H, m, H-23), 1.15 (2H, m, H-12β, 17), 0.99 (3H, s, H-19), 0.90 (3H, d, J = 6.4 Hz, H-26), 0.66 (3H, s, H-18); 13C-NMR (150 MHz, Chloroform-d) δC: 37.4 (C-1), 31.7 (C-2), 71.8 (C-3), 42.3 (C-4), 140.9 (C-5), 121.7 (C-6), 32.0 (C-7), 32.0 (C-8), 50.2 (C-9), 36.3 (C-10), 21.2 (C-11), 39.9 (C-12), 42.4 (C-13), 56.9 (C-14), 24.4 (C-15), 28.4 (C-16), 56.2 (C-17), 12.1 (C-18), 19.5 (C-19), 36.3 (C-20), 18.9 (C-21), 34.0 (C-22), 26.2 (C-23), 45.9 (C-24), 29.2 (C-25), 19.2 (C-26), 19.9 (C-27), 23.2 (C-28), 12.0 (C-29)。以上數(shù)據(jù)與文獻(xiàn)(Kadowaki et al., 2003)報(bào)道基本一致,因此鑒定為β-谷甾醇。
化合物20" 淡黃色油狀物,分子式為C28H54O2, ESI-MS m/z: 421.4" [M-H]-。1H-NMR (600 MHz, Chloroform-d) δH: 5.33 (2H, m, H-9, 10), 4.11 (2H, t, J = 7.0 Hz, H-1′), 2.27 (2H, t, J = 7.6 Hz, H-2), 2.13 (2H, m, H-8, 11), 1.62 (4H, m, H-3, 2′), 1.36~1.21 (34H, m, H-4-6, 12-15, 3′-11′), 0.87 (6H, t, J = 7.0 Hz, H-16, 12′); 13C-NMR (150 MHz, Chloroform-d) δC: 174.0 (C-1), 34.5 (C-2), 25.1 (C-3), 29.3 (C-4), 29.8 (C-5), 29.8 (C-6), 29.7 (C-7), 27.3 (C-8), 130.2 (C-9), 130.3 (C-10), 27.3 (C-11), 29.5 (C-12), 29.3 (C-13), 31.7 (C-14), 22.7 (C-15), 14.4 (C-16), 64.3 (C-1′), 29.2 (C-2′), 25.8 (C-3′), 29.3 (C-4′), 29.3 (C-5′), 29.3 (C-6′), 29.3 (C-7′), 29.5(C-8′), 29.3(C-9′), 32.0 (C-10′), 22.8 (C-11′), 14.2 (C-12′)。以上數(shù)據(jù)與文獻(xiàn)(陳丹丹等,2021)報(bào)道基本一致,因此鑒定為dodecyl(Z)-9-hexadecenoate。
化合物21" 淡黃色油狀物,分子式為C26H52O, ESI-MS m/z: 381.4" [M+H]+。1H-NMR (600 MHz, Chloroform-d) δH: 9.76 (1H, s, H-1), 2.42 (2H, t, J = 7.3 Hz, H-2), 1.33~1.25 (46H, overlap, H-3-25), 0.88 (3H, t, J = 6.8 Hz, H-26); 13C-NMR (150 MHz, Chloroform-d) δC: 203.0 (C-1), 43.4 (C-2), 22.7 (C-3), 29.7 (C-4-23), 31.9 (C-24), 22.1 (C-25), 14.1 (C-26)。以上數(shù)據(jù)與文獻(xiàn)(Govindan et al., 2019)報(bào)道基本一致,因此鑒定為hexacosanal。
3.2 抗炎活性評(píng)價(jià)結(jié)果
利用CCK-8法對(duì)分離得到的部分化合物進(jìn)行細(xì)胞毒性測(cè)定,結(jié)果表明,化合物1-3、6、11、12、17、19在濃度為6.25 μmol·L-1,化合物5、14-16在濃度為50.00 μmol·L-1以及化合物13在濃度為12.50 μmol·L-1以下時(shí),對(duì)RAW264.7細(xì)胞無(wú)明顯的細(xì)胞毒性。RAW264.7細(xì)胞經(jīng)過(guò)LPS(1.00 μg·mL-1)刺激24 h后,與空白組比較,模型組中釋放的NO含量顯著增加(Plt;0.01);與模型組比較,化合物1-3、6、11-16、17、19在檢測(cè)濃度(1.56~50.00 μmol·L-1)下均能顯著抑制NO的釋放量(Plt;0.05或Plt;0.01),化合物5在濃度為50.00 μmol·L-1時(shí)對(duì)NO的釋放量無(wú)抑制作用,但在12.50、25.00 μmol·L-1濃度下,對(duì)NO的釋放量有抑制作用(Plt;0.05),結(jié)果表明上述化合物均具有一定的抗炎活性(表1)。
4" 討論與結(jié)論
橐吾屬植物主要成分為倍半萜、三萜、苯丙素
等,具有抗腫瘤、抗炎等作用(廖佳慧等,2023)。本研究從黃帚橐吾石油醚部位和正丁醇部位分離得到21個(gè)化合物,包括5個(gè)倍半萜化合物(1-5)、4個(gè)木脂素類化合物(6-9)、9個(gè)苯環(huán)類化合物(10-18)以及3個(gè)其他類化合物(19-21),其中化合物1-4、6、11-16、18、20、21為首次從黃帚橐吾中分離得到。
黃帚橐吾為藏藥“日肖”的基原植物之一,其具有清宿熱、解毒愈瘡、干黃水、祛風(fēng)濕等功效,目前尚未見(jiàn)相關(guān)抗炎活性報(bào)道。因此,本研究采用LPS誘導(dǎo)的RAW264.7細(xì)胞模型對(duì)部分單體化合物進(jìn)行抗炎活性研究發(fā)現(xiàn)化合物1-3、5(倍半萜類)、6(木脂素類)、11-16、17(苯環(huán)類)、19 (甾體類)等共13個(gè)潛在的抗炎活性成分。根據(jù)文獻(xiàn)可知,化合物2通過(guò)影響 LPS/NF-κB來(lái)產(chǎn)生潛在抗炎活性(Mora-Ramiro et al., 2020);化合物5既沒(méi)有抗腫瘤活性也沒(méi)有抗菌活性,其藥理活性有待開(kāi)發(fā)(Liu et al., 2007; 孫曉白, 2007);化合物6通過(guò)對(duì)5-脂氧合酶的抑制作用產(chǎn)生抗炎活性(夏侯真如等,2022);化合物11通過(guò)抑制p38 MAPK的信號(hào)傳導(dǎo)來(lái)產(chǎn)生抗炎活性(韋子強(qiáng)等,2023);化合物12、13、16主要為抗氧化作用(胡婷,2013; 王美嬌等,2019);化合物14可作為阿魏酸前藥,產(chǎn)生抗炎活性(Botti et al., 2022);化合物15為阿魏酸乙酯,其與多通路及多蛋白間存在相互性,揭示其可能是通過(guò)多成分、多靶點(diǎn)及多途徑來(lái)達(dá)到抗炎的作用 (王加楠等,2023); 化合物17通過(guò)抑
制5-LOX和COX-1的活性位點(diǎn)產(chǎn)生抗炎活性(Resch et al., 2001);化合物19通過(guò)抑制TNF-α誘導(dǎo)的MH7A細(xì)胞的增殖、遷移、侵襲和炎癥因子分泌來(lái)產(chǎn)生抗炎作用(谷慧敏等,2023)。本研究豐富了黃帚橐吾的化學(xué)成分,明確了其抗炎活性成分,為后續(xù)黃帚橐吾抗炎活性的開(kāi)發(fā)和利用提供了一定基礎(chǔ)。
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(責(zé)任編輯" 鄧斯麗)