PL247262B1 - Method for preparing 5-hydroxy-8-methoxyflavone 7-O-β-D-glucoside - Google Patents
Method for preparing 5-hydroxy-8-methoxyflavone 7-O-β-D-glucoside Download PDFInfo
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- PL247262B1 PL247262B1 PL438508A PL43850821A PL247262B1 PL 247262 B1 PL247262 B1 PL 247262B1 PL 438508 A PL438508 A PL 438508A PL 43850821 A PL43850821 A PL 43850821A PL 247262 B1 PL247262 B1 PL 247262B1
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Abstract
Wynalazek dotyczy sposobu wytwarzania 7-O-β-D-glukozydu 5-hydroksy-8-metoksyflawonu o wzorze 2. Postępując zgodnie z wynalazkiem, w wyniku działania układu enzymatycznego zawartego w komórkach szczepu Beauveria Bassiana AM278, następuje regioselektywna O-glikozylacja w substracie. Uzyskany w ten sposób produkt wydziela się z wodnej kultury mikroorganizmu, znanym sposobem, przez ekstrakcję rozpuszczalnikiem organicznym niemieszającym się z wodą.The invention relates to a method for the production of 5-hydroxy-8-methoxyflavone 7-O-β-D-glucoside of formula 2. By proceeding according to the invention, as a result of the action of the enzymatic system contained in the cells of the Beauveria Bassiana AM278 strain, regioselective O-glycosylation occurs in the substrate. The product obtained in this way is isolated from the aqueous culture of the microorganism, in a known manner, by extraction with an organic solvent immiscible with water.
Description
Opis wynalazkuDescription of the invention
Przedmiotem wynalazku jest sposób wytwarzania 7-O-e-D-glukozydu 5-hydroksy-8-metoksyflawonu (7-O-^-D-glukozydu wogoniny).The subject of the invention is a method for producing 5-hydroxy-8-methoxyflavone 7-O-e-D-glucoside (wogonin 7-O-e-D-glucoside).
Metoda, według wynalazku może znaleźć zastosowanie w przemyśle farmaceutycznym jako lek przeciwzapalny, przeciwwirusowy i przeciwnowotworowy.The method according to the invention may find application in the pharmaceutical industry as an anti-inflammatory, antiviral and anticancer drug.
Substratem do wytwarzania 7-O-e-D-glukozydu 5-hydroksy-8-metoksyflawonu jest wogonina (5,7-dihydroksy-8-metoksyflawon) izolowany m.in. z korzenia tarczycy bajkalskiej Scutteralia baicalensis. Wogonina wykazuje szereg właściwości biologicznych w tym: przeciwzapalne (Li-Weber, M., New therapeutic aspects of flavones: the anticancer properties of Scutellaria and its main active constituents Wogonin, Baicalein and Baicalin. Cancer treatment reviews 2009, 35, (1), 57-68.), przeciwwirusowe (Chu, Y.; Lv, X.; Zhang, L.; Fu, X.; Song, S.; Su, A.; Chen, D.; Xu, L.; Wang, Y.; Wu, Z., Wogonin inhibits in vitro herpes simplex virus type 1 and 2 infection by modulating cellular NF-kB and MAPK pathways. BMC microbiology 2020, 20, (1), 1-11.) oraz przeciwnowotworowe (Wang, W.; Guo, Q.-L; You, Q.-D.; Zhang, K.; Yang, Y.; Yu, J.; Liu, W.; Zhao, L.; Gu, H.-Y.; Hu, Y., The anticancer activities of wogonin in murine sarcoma S180 both in vitro and in vivo. Biological and Pharmaceutical Bulletin 2006, 29, (6), 1132-1137.; Li-Weber, M., New therapeutic aspects of flavones: the anticancer properties of Scutellaria and its main active constituents Wogonin, Baicalein and Baicalin. Cancer treatment reviews 2009, 35, (1), 57-68. Aktywność biologiczna wogoniny może być jednak ograniczona, ze względu na niską biodostępność tego flawonu, związaną z jego słabą rozpuszczalnością w wodzie.The substrate for the production of 5-hydroxy-8-methoxyflavone 7-O-e-D-glucoside is wogonin (5,7-dihydroxy-8-methoxyflavone) isolated, among others, from the root of Scutteralia baicalensis. Wogonin has a number of biological properties including: anti-inflammatory (Li-Weber, M., New therapeutic aspects of flavones: the anticancer properties of Scutellaria and its main active constituents Wogonin, Baicalein and Baicalin. Cancer treatment reviews 2009, 35, (1), 57-68.), antiviral (Chu, Y.; Lv, X.; Zhang, L.; Fu, X.; Song, S.; Su, A.; Chen, D.; Xu, L.; Wang, Y.; Wu, Z., Wogonin inhibits in vitro herpes simplex virus type 1 and 2 infection by modulating cellular NF-kB and MAPK pathways. BMC microbiology 2020, 20, (1), 1-11.) and anticancer (Wang, W.; Guo, Q.-L; You, Q.-D.; Zhang, K.; Yang, Y.; Yu, J.; Liu, W.; Zhao, L.; Gu, H.-Y.; Hu, Y., The anticancer activities of wogonin in murine sarcoma S180 both in vitro and in vivo. Biological and Pharmaceutical Bulletin 2006, 29, (6), 1132-1137.; Li-Weber, M., New therapeutic aspects of flavones: the anticancer properties of Scutellaria and its main active constituents Wogonin, Baicalein and Baicalin. Cancer treatment reviews 2009, 35, (1), 57-68. The biological activity of wogonin may be limited, however, due to the low bioavailability of this flavone, related to its poor solubility in water.
Jednym ze sposobów zwiększenia rozpuszczalności w wodzie, a co za tym idzie, biodostępności, jest sprzęganie związku bioaktywnego z polarnymi cząsteczkami takimi jak cukry.One way to increase water solubility, and therefore bioavailability, is to conjugate the bioactive compound with polar molecules such as sugars.
Znany jest sposób otrzymywania 7-O-e-D-glukozydu 5-hydroksy-8-metoksyflawonu - pochodnej wogoniny sprzężonej z cząsteczką β-D-glukopiranozy, z wykorzystaniem bakterii Escherichia coli z wklonowanym genem 7-O-glukozylotransferazy pochodzącym z kultur korzeni włośnikowatych tarczycy bajkalskiej Scuttelaria baicalensis Georgi (Hirotani, M.; Kuroda, R.; Suzuki, H.; Yoshikawa, T., Cloning and expression of UDP- glucose: flavonoid 7-O-glucosyltransferase from hairy root cultures of Scutellaria baicalensis. Planta 2000, 210, (6), 1006-1013.).There is a known method of obtaining 5-hydroxy-8-methoxyflavone 7-O-e-D-glucoside - a wogonin derivative conjugated with a β-D-glucopyranose molecule, using Escherichia coli bacteria with a cloned 7-O-glucosyltransferase gene originating from cultures of the hairy roots of Scuttelaria baicalensis Georgi (Hirotani, M.; Kuroda, R.; Suzuki, H.; Cloning and expression of UDP-glucose: flavonoid 7-O-glucosyltransferase from hairy root cultures of Scutellaria planta 2000, 210, (6), 1006-1013.
Istota wynalazku polega na tym, że do podłoża odpowiedniego dla grzybów strzępkowych wprowadza się szczep Beauveria Bassiana AM278. Po upływie, co najmniej 48 godzin do hodowli wprowadza się substrat, jakim jest 5,7-dihydroksy-8-metoksyflawon (wogonina) o wzorze 1, rozpuszczony w rozpuszczalniku organicznym mieszającym się z wodą. Transformację prowadzi się w temperaturze od 15 do 30 stopni Celsjusza, przy ciągłym wstrząsaniu, co najmniej 3 dni. Kolejno produkt z hodowli ekstrahuje się rozpuszczalnikiem organicznym niemieszającym się z wodą i oczyszcza chromatograficznie.The essence of the invention is that Beauveria Bassiana AM278 strain is introduced into a medium suitable for filamentous fungi. After at least 48 hours, a substrate is introduced into the culture, which is 5,7-dihydroxy-8-methoxyflavone (wogonin) of formula 1, dissolved in an organic solvent miscible with water. The transformation is carried out at a temperature of 15 to 30 degrees Celsius, with continuous shaking, for at least 3 days. The product from the culture is then extracted with an organic solvent immiscible with water and purified chromatographically.
W wyniku regioselektywnej glikozylacji grupy hydroksylowej w pozycji C7 substratu jakim jest wogonina o wzorze 1, aromatycznego otrzymuje się 7-O-e-D-glukozydu 5-hydroksy-8-metoksyflawonu o wzorze 2, a reakcję prowadzi się w wodnej kulturze szczepu Beauveria Bassiana AM278.As a result of regioselective glycosylation of the hydroxyl group at the C7 position of the substrate, which is wogonin of formula 1, the aromatic 5-hydroxy-8-methoxyflavone 7-O-e-D-glucoside of formula 2 is obtained, and the reaction is carried out in an aqueous culture of the Beauveria Bassiana AM278 strain.
Korzystnie jest, gdy rozpuszczalnikiem mieszającym się z wodą jest dimetylosulfotlenek i/lub metanol, i/lub aceton.It is preferred that the water-miscible solvent is dimethyl sulfoxide and/or methanol and/or acetone.
Korzystnie także jest, gdy proces prowadzi się w temperaturze 20-25 stopni Celsjusza.It is also beneficial if the process is carried out at a temperature of 20-25 degrees Celsius.
Korzystnie jest również, gdy rozpuszczalnikiem niemieszającym się z wodą jest octan etylu albo eter dietylowy.It is also preferred that the water-immiscible solvent is ethyl acetate or diethyl ether.
Zasadniczą zaletą wynalazku jest otrzymanie 7-O-e-D-glukozyd 5-hydroksy-8-metoksyflawonu o wzorze 2, w kulturze całych niemodyfikowanych genetycznie komórek, w temperaturze pokojowej i przy pH naturalnym dla szczepu.The main advantage of the invention is the obtaining of 5-hydroxy-8-methoxyflavone 7-O-e-D-glucoside of formula 2 in a culture of whole, non-genetically modified cells, at room temperature and at the natural pH of the strain.
Wynalazek jest bliżej objaśniony na przykładzie wykonania.The invention is explained in more detail with reference to an example embodiment.
Przykład. Do kolby Erlenmajera o pojemności 300 cm3, w której znajduje się 100 cm3 sterylnej pożywki zawierającej 1 g aminobaku i 3 g glukozy, wprowadza się szczep Beauveria Bassiana AM278. Po 72 godzinach jego wzrostu dodaje się 20 mg 5,7-dihydroksy-8-metoksyflawon (wogonina) o wzorze 1, rozpuszczonego w 1 cm3 dimetylosulfotlenku (DMSO). Transformację prowadzi się w 25 stopniach Celsjusza przy ciągłym wstrząsaniu przez 8 dni. Następnie mieszaninę poreakcyjną ekstrahuje się trzykrotnie octanem etylu, osusza bezwodnym siarczanem magnezu i odparowuje rozpuszczalnik. Otrzymany ekstrakt oczyszcza się chromatograficznie, używając jako eluentu mieszaniny chloroform i metanol 10:1.Example. Beauveria Bassiana strain AM278 is introduced into a 300 cm 3 Erlenmeyer flask containing 100 cm 3 of sterile medium containing 1 g of aminobac and 3 g of glucose. After 72 hours of its growth, 20 mg of 5,7-dihydroxy-8-methoxyflavone (wogonin) of formula 1, dissolved in 1 cm 3 of dimethyl sulfoxide (DMSO), is added. The transformation is carried out at 25 degrees Celsius with constant shaking for 8 days. Then the reaction mixture is extracted three times with ethyl acetate, dried with anhydrous magnesium sulfate and the solvent is evaporated. The extract obtained is purified chromatographically, using a mixture of chloroform and methanol 10:1 as eluent.
Na tej drodze otrzymuje się 7-O-e-D-glukozyd 5-hydroksy-8-metoksyflawon z wydajnością izolowaną 1%.In this way, 5-hydroxy-8-methoxyflavone 7-O-e-D-glucoside is obtained with an isolated yield of 1%.
1H NMR 600 MHz, DMSO-ds, δ [ppm]: 12,53 (1H, s, 5-OH), 8,09 (2H, m, H-2’,6’), 7,63 (3H, m, H-3’,4’,5’), 7,06 (1H, s, H-3), 6,68 (1H, s, H-6), 5,08 (1H, d, J = 7.1 Hz, H-1”), 3,90 (3H, s, C8-O-CH3), 3,71 (1H, m, H-6”a), 3,47 (1H, m, H-6”b), 3,33 (1H, m, nałożone sygnały od H-2” na H-3”), 3,33 (1H, m, nałożone sygnały od H-3” na H-2”), 3,19 (1H, m, H-4”). 1H NMR 600 MHz, DMSO-ds, δ [ppm]: 12.53 (1H, s, 5-OH), 8.09 (2H, m, H-2',6'), 7.63 (3H, m, H-3',4',5'), 7.06 (1H, s, H-3), 6.68 (1H, s, H-6), 5.08 (1H, d, J = 7.1 Hz, H-1"), 3.90 (3H, s, C8-O-CH3), 3.71 (1H, m, H-6”a), 3.47 (1H, m, H-6”b), 3.33 (1H, m, superimposed signals from H-2” on H-3”), 3.33 (1H, m, superimposed signals from H-3” on H-2”), 3.19 (1H, m, H-4”).
13C NMR 150 MHz, DMSO-ds, δ [ppm]: 182,4 (C-4), 163,6 (C-2), 156,9 (C-7), 156,1 (C-9), 149,4 (C-5), 132,2 (C-4’), 129,7 (C-8), 129,3 (C-3’,C-5’), 126,4 (C-2’,C-6’), 123,3 (C-1’), 105,3 (C-10), 105,2 (C-3), 100,3 (C-1”), 98,9 (C-6), 77,3 (C-5”), 76,6 (C-3”), 73,3 (C-2”), 69,6 (C-4”), 61,4 (C8-O-CH3), 60,6 (C-6”). 13 C NMR 150 MHz, DMSO-ds, δ [ppm]: 182.4 (C-4), 163.6 (C-2), 156.9 (C-7), 156.1 (C-9), 149.4 (C-5), 132.2 (C-4'), 129.7 (C-8), 129.3 (C-3',C-5'), 126.4 (C-2',C-6'), 123.3 (C-1'), 105.3 (C-10), 105.2 (C-3), 100.3 (C-1"), 98.9 (C-6), 77.3 (C-5"), 76.6 (C-3"), 73.3 (C-2") 69.6 (C-4") 61.4 (C8-O-CH3), 60.6 (C-6”).
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