Baicalin

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Baicalin
Baicalin.svg
Names
IUPAC name
5,6-Dihydroxy-4-oxoflav-2-en-7-yl β-D-glucopyranosiduronic acid
Systematic IUPAC name
(2S,3S,4S,5R,6S)-6-[(5,6-Dihydroxy-4-oxo-2-phenyl-4H-1-benzopyran-7-yl)oxy]-3,4,5-trihydroxyoxane-2-carboxylic acid
Other names
Baicalein 7-O-glucuronide; 5,6-Dihydroxy-4-oxygen-2-phenyl-4H-1-benzopyran-7-β-D-glucopyranose acid
Identifiers
3D model (JSmol)
70480
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.133.557 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 606-866-1
KEGG
PubChem CID
UNII
  • InChI=1S/C21H18O11/c22-9-6-10(8-4-2-1-3-5-8)30-11-7-12(14(23)15(24)13(9)11)31-21-18(27)16(25)17(26)19(32-21)20(28)29/h1-7,16-19,21,23-27H,(H,28,29)/t16-,17-,18+,19-,21+/m0/s1 Yes check.svgY
    Key: IKIIZLYTISPENI-ZFORQUDYSA-N Yes check.svgY
  • InChI=1/C21H18O11/c22-9-6-10(8-4-2-1-3-5-8)30-11-7-12(14(23)15(24)13(9)11)31-21-18(27)16(25)17(26)19(32-21)20(28)29/h1-7,16-19,21,23-27H,(H,28,29)/t16-,17-,18+,19-,21+/m0/s1
    Key: IKIIZLYTISPENI-ZFORQUDYBD
  • O=C3\C=C(/Oc2cc(O[C@@H]1O[C@H](C(=O)O)[C@@H](O)[C@H](O)[C@H]1O)c(O)c(O)c23)c4ccccc4
Properties
C21H18O11
Molar mass 446.364 g·mol−1
Melting point 202 to 205 °C (396 to 401 °F; 475 to 478 K)
Hazards
GHS labelling:
GHS-pictogram-exclam.svg
Warning
H315, H319, H335
P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
X mark.svgN  verify  (what is  Yes check.svgYX mark.svgN ?)

As baicalin is a flavone glycoside, it is a flavonoid. It is the glucuronide of baicalein.

Contents

Natural occurrences

Baicalin is found in several species in the genus Scutellaria, including Scutellaria baicalensis , [1] and Scutellaria lateriflora . There are 10 mg/g baicalin in Scutellaria galericulata leaves. [2] It is also present in the bark isolate of the Oroxylum indicum tree.

Medical uses

Baicalin is one of the chemical ingredients of at least two herbal supplements: Shuanghuanglian [1] and Sho-Saiko-To, which is a Chinese classic herbal formula, and listed in Japan as Kampo medicine.[ citation needed ]

Baicalin, along with its aglycone baicalein, is a positive allosteric modulator of the benzodiazepine site and/or a non-benzodiazepine site of the GABAA receptor. [3] [4] [5] In mice, baicalin produces anxiolytic effects without sedative or myorelaxant effects. [6] [7] It is thought that baicalin, along with other flavonoids, may underlie the anxiolytic effects of S. baicalensis and S. lateriflora. [8] [9]

Baicalin is a known prolyl endopeptidase inhibitor. [10] It induces apoptosis in pancreatic cancer cells. [11]

Related Research Articles

<i>Scutellaria</i> Genus of flowering plants

Scutellaria is a genus of flowering plants in the mint family, Lamiaceae. They are known commonly as skullcaps. The generic name is derived from the Latin scutella, meaning "a small dish, tray or platter", or "little dish", referring to the shape of the calyx. The common name alludes to the resemblance of the same structure to "miniature medieval helmets". The genus has a subcosmopolitan distribution, with species occurring nearly worldwide, mainly in temperate regions.

<span class="mw-page-title-main">Bretazenil</span> Chemical compound

Bretazenil (Ro16-6028) is an imidazopyrrolobenzodiazepine anxiolytic drug which is derived from the benzodiazepine family, and was invented in 1988. It is most closely related in structure to the GABA antagonist flumazenil, although its effects are somewhat different. It is classified as a high-potency benzodiazepine due to its high affinity binding to benzodiazepine binding sites where it acts as a partial agonist. Its profile as a partial agonist and preclinical trial data suggests that it may have a reduced adverse effect profile. In particular bretazenil has been proposed to cause a less strong development of tolerance and withdrawal syndrome. Bretazenil differs from traditional 1,4-benzodiazepines by being a partial agonist and because it binds to α1, α2, α3, α4, α5 and α6 subunit containing GABAA receptor benzodiazepine receptor complexes. 1,4-benzodiazepines bind only to α1, α2, α3 and α5GABAA benzodiazepine receptor complexes.

<i>Scutellaria baicalensis</i> Species of flowering plant

Scutellaria baicalensis, with the common name Baikal skullcap or Chinese skullcap, is a species of flowering plant in the family Lamiaceae.

<i>Scutellaria lateriflora</i> Species of flowering plant

Scutellaria lateriflora, is a hardy perennial herb of the mint family, Lamiaceae, native to North America.

<span class="mw-page-title-main">Honokiol</span> Chemical compound

Honokiol is a lignan isolated from the bark, seed cones, and leaves of trees belonging to the genus Magnolia. It has been identified as one of the chemical compounds in some traditional eastern herbal medicines along with magnolol, 4-O-methylhonokiol, and obovatol.

Shō-saiko-tō (小柴胡湯), also known as minor bupuleurum formula and xiǎocháihútāng (XCHT), is a herbal supplement, believed to enhance liver health. Sho-Saiko-To is a widely used prescription drug in China and is a listed formula in China and Japan as a Kampo medicine. There are currently ongoing clinical trials for Sho-Saiko-To at University of California, San Diego and Memorial Sloan-Kettering Cancer Center. The active ingredients of sho-saiko-to discovered so far include baicalin, baicalein, glycyrrhizin, saikosaponins, ginsenosides, wogonin, and gingerol.

<span class="mw-page-title-main">Leonurine</span> Chemical compound

Leonurine is a pseudoalkaloid that has been isolated from Leonotis leonurus, Leonotis nepetifolia, Leonurus japonicus, Leonurus cardiaca (motherwort), Leonurus sibiricus, as well as other plants of family Lamiaceae. Leonurine is easily extracted into water.

<span class="mw-page-title-main">Kavain</span> Chemical compound

Kavain is the main kavalactone found mostly in the roots of the kava plant.

<span class="mw-page-title-main">Baicalein</span> Chemical compound

Baicalein (5,6,7-trihydroxyflavone) is a flavone, a type of flavonoid, originally isolated from the roots of Scutellaria baicalensis and Scutellaria lateriflora. It is also reported in Oroxylum indicum and Thyme. It is the aglycone of baicalin. Baicalein is one of the active ingredients of Sho-Saiko-To, which is a Chinese classic herbal formula, and listed in Japan as Kampo medicine. As a Chinese herbal supplement, it is believed to enhance liver health.

<span class="mw-page-title-main">Viqualine</span> Medication

Viqualine (INN) is an antidepressant and anxiolytic drug that was never marketed. It acts as a potent and selective serotonin releasing agent and serotonin reuptake inhibitor. In addition, viqualine displaces diazepam from the GABAA receptor and produces benzodiazepine-like effects, indicating that it is also a positive allosteric modulator of the benzodiazepine site of the GABAA receptor. The drug has mainly been researched as a potential treatment for alcoholism.

<span class="mw-page-title-main">Wogonin</span> Chemical compound

Wogonin is an O-methylated flavone, a flavonoid-like chemical compound which is found in Scutellaria baicalensis.

<span class="mw-page-title-main">Oroxylin A</span> Chemical compound

Oroxylin A is an O-methylated flavone, a chemical compound that can be found in the medicinal plants Scutellaria baicalensis and Scutellaria lateriflora, and the Oroxylum indicum tree. It has demonstrated activity as a dopamine reuptake inhibitor, and is also a negative allosteric modulator of the benzodiazepine site of the GABAA receptor. Oroxylin A has been found to improve memory consolidation in mice by elevating brain-derived neurotrophic factor (BDNF) levels in the hippocampus.

<span class="mw-page-title-main">Scutellarin</span> Chemical compound

Scutellarin is a flavone, a type of phenolic chemical compound. It can be found in the Asian "barbed skullcap" Scutellaria barbata and the north American plant S. lateriflora both of which have been used in traditional medicine. The compound is found only in trace amounts in the "Chinese skullcap" Scutellaria baicalensis, another plant used in traditional Chinese medicine.

<span class="mw-page-title-main">6-Hydroxyflavone</span> Chemical compound

6-Hydroxyflavone is a flavone, a type of chemical compound. It is one of the noncompetitive inhibitors of cytochrome P450 2C9. It is reported in Crocus and leaves of Barleria prionitis Linn. . 6-Hydroxyflavone may have a potential as a therapeutic drug capable for the treatment of anxiety-like disorders.

<span class="mw-page-title-main">Taxifolin</span> Chemical compound

Taxifolin (5,7,3',4'-flavan-on-ol), also known as dihydroquercetin, belongs to the subclass flavanonols in the flavonoids, which in turn is a class of polyphenols.

<span class="mw-page-title-main">Huang Bai</span> Herb in Chinese medicine

Huáng bǎi, huáng bó or huáng bò is one of the fifty fundamental herbs of traditional Chinese medicine. Known also as Cortex Phellodendri, it is the bark of one of two species of Phellodendron tree: Phellodendron amurense or Phellodendron chinense.

Flavonolignans are natural phenols composed of a part flavonoid and a part phenylpropane.

Baicalein 7-O-glucuronosyltransferase is an enzyme with systematic name UDP-D-glucuronate:5,6,7-trihydroxyflavone 7-O-glucuronosyltransferase . This enzyme catalyses the following chemical reaction

Baicalin-beta-D-glucuronidase (EC 3.2.1.167, baicalinase) is an enzyme with systematic name 5,6,7-trihydroxyflavone-7-O-beta-D-glucupyranosiduronate glucuronosylhydrolase. This enzyme catalyses the following chemical reaction

Shuanghuanglian is a traditional Chinese medicine with a long history for treating respiratory tract infection in China. Some of its active ingredients are Wogonin, Baicalin and baicalein. It is derived from three Chinese herbal medicines, namely, Lonicera japonica Thunb., Scutellaria baicalensis Georgi, and Forsythia suspense (Thunb.) Vahl. It has been used for the treatment of acute respiratory tract infections since 1973. It is mentioned in the Chinese Pharmacopoeia.

References

  1. 1 2 Su, Hai-xia; Yao, Sheng; Zhao, Wen-Feng; Li, Min-jun; Liu, Jia; Shang, Wei-Juan; Xie, Hang; Ke, Chang-Qiang; Hu, Hang-Chen; Gao, Mei-na; Yu, Kun-Qian; Liu, Hong; Shen, Jing-Shan; Tang, Wei; Zhang, Lei-ke; Xiao, Geng-fu; Ni, Li; Wang, Dao-wen; Zuo, Jian-Ping; Jiang, Hua-Liang; Bai, Fang; Wu, Yan; Ye, Yang; Xu, Ye-Chun (2020). "Anti-SARS-CoV-2 activities in vitro of Shuanghuanglian preparations and bioactive ingredients". Acta Pharmacologica Sinica. 41 (9): 1167–1177. doi:10.1038/s41401-020-0483-6. PMC   7393338 . PMID   32737471.
  2. ↑ P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979
  3. ↑ Wang H, Hui KM, Xu S, Chen Y, Wong JT, Xue H (2002). "Two flavones from Scutellaria baicalensis Georgi and their binding affinities to the benzodiazepine site of the GABAA receptor complex". Pharmazie. 57 (12): 857–8. PMID   12561253.
  4. ↑ Hui KM, Wang XH, Xue H (2000). "Interaction of flavones from the roots of Scutellaria baicalensis with the benzodiazepine site". Planta Med. 66 (1): 91–3. doi:10.1055/s-0029-1243121. PMID   10705749.
  5. ↑ Edwin Lowell Cooper; Nobuo Yamaguchi (1 January 2004). Complementary and Alternative Approaches to Biomedicine. Springer Science & Business Media. pp.  188–. ISBN   978-0-306-48288-5.
  6. ↑ Xu Z, Wang F, Tsang SY, Ho KH, Zheng H, Yuen CT, Chow CY, Xue H (2006). "Anxiolytic-Like Effect of baicalin and its additivity with other anxiolytics". Planta Med. 72 (2): 189–92. doi:10.1055/s-2005-873193. PMID   16491459.
  7. ↑ Liao JF, Hung WY, Chen CF (2003). "Anxiolytic-like effects of baicalein and baicalin in the Vogel conflict test in mice". Eur. J. Pharmacol. 464 (2–3): 141–6. doi:10.1016/s0014-2999(03)01422-5. PMID   12620506.
  8. ↑ Awad R, Arnason JT, Trudeau V, Bergeron C, Budzinski JW, Foster BC, Merali Z (2003). "Phytochemical and biological analysis of skullcap (Scutellaria lateriflora L.): a medicinal plant with anxiolytic properties". Phytomedicine. 10 (8): 640–9. doi:10.1078/0944-7113-00374. PMID   14692724.
  9. ↑ Stefanie Schwartz (9 January 2008). Psychoactive Herbs in Veterinary Behavior Medicine. John Wiley & Sons. pp. 139–. ISBN   978-0-470-34434-7.
  10. ↑ Tarragó, T; Kichik, N; Claasen, B; Prades, R; Teixidó, M; Giralt, E (2008). "Baicalin, a prodrug able to reach the CNS, is a prolyl oligopeptidase inhibitor". Bioorganic & Medicinal Chemistry. 16 (15): 7516–24. doi:10.1016/j.bmc.2008.04.067. PMID   18650094.
  11. ↑ Takahashi H, Chen MC, Pham H, Angst E, King JC, Park J, Brovman EY, Ishiguro H, Harris DM, Reber HA, Hines OJ, Gukovskaya AS, Go VL, Eibl G (2011). "Baicalein, a component of Scutellaria baicalensis, induces apoptosis by Mcl-1 down-regulation in human pancreatic cancer cells". Biochim Biophys Acta. 1813 (8): 1465–1474. doi:10.1016/j.bbamcr.2011.05.003. PMC   3123440 . PMID   21596068.
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