Names | |
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IUPAC name 2,3,9,10-tetramethoxy-5,6-dihydroisoquinolino[2,1-b]isoquinolin-7-ium | |
Other names Berbericinine | |
Identifiers | |
3D model (JSmol) | |
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ChemSpider | |
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PubChem CID | |
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CompTox Dashboard (EPA) | |
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Properties | |
C21H22NO4+ | |
Molar mass | 352.4083 g/mol |
Density | 1.23 g/cm3 |
Boiling point | 482.9 °C (901.2 °F; 756.0 K) at 760 mmHg |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). |
Palmatine is a protoberberine alkaloid found in several plants including Phellodendron amurense , Coptis Chinensis [1] (Rhizoma coptidis, chinese goldthread) and Corydalis yanhusuo , [2] Tinospora cordifolia [3] (gurjo, heart-leaved moonseed), Tinospora sagittata , [4] Phellodendron amurense [5] (amur cork tree), Stephania yunnanensis. [6]
It is the major component of the protoberberine extract from Enantia chlorantha . [7]
It has been studied for its potential use in the treatment of jaundice, dysentery, hypertension, inflammation, and liver-related diseases. [8] This compound also has weak in vitro activity against flavivirus. [9]
Palmatine can be used to treat Alzheimer’s disease, mainly by inhibiting the activity of acetylcholinesterase (AChE), butyrylcholinesterase (BChE) and neuraminidase-1 (NA-1). It was found, that the positively charged nitrogen on palmatine binds in the gorge of active sire of AChE. [10]
Research show that palmatine had antidepressant effect. It was achieved by regulating brain catalase levels, monoamine oxidase-A (MAO-A) activity, lipid peroxidation, plasma nitrite and corticosterone levels. [11]
Palmatine achieved hypoglycemic effects by inducing insulin release and insulin-mimicking activity. [12] [13] In addition, studies found that palmatine also inhibited the activity of lens aldose reductase, [14] sucrase and maltase. [15] In vivo research showed that palmatine reduced serum total cholesterol (TC) and triglycerides (TG) and increased serum high-density lipoprotein cholesterol. [16]
Research showed that palmatine had broad anti-cancer activity. Palmatine had significant growth inhibitory effects on seven human cancer cell lines: 7701QGY, SMMC7721, HepG2, CEM, CEM/VCR, K III and Lewis. [17] In addition, palmatine also had anti-cancer activity on MCF-7, U251, KB, [18] CHOK-1, HT-29 and SiHacell lines. [19] Palmatine induced apoptosis in human skin epithelial carcinoma cells (A431) in a concentration- and time-dependent manner via damaging severely to DNA and inhibiting the activity of Bcl-2 protein. [20] [21] [22] In addition, palmatine can inhibit the proliferation and infiltration of cancer cells.
Palmitine has inhibitory effect on Gram-positive bacteria which is significantly stronger than that on Gram-negative bacteria, [23] and 9-O-substituted palmatine derivatives exhibited stronger antibacterial activity. [24] [25]
Studies have shown that palmatine can decrease the production of pro-inflammatory factors and increase the production of anti-inflammatory factors. [26]
Studies have shown that palmatine chave antioxidant activity, [27] [28] had a protective effect on gastric ulcer, [29] derivatives of palmatine were more effective against ulcerative colitis, including low cytotoxicity to intestinal epithelial cells. [30] In addition, palmatine might have the antiarrhythmic effect, [31] and provideprotection from myocardial ischemia-reperfusion injury. [32]
A large number of studies have shown that palmatine has a complex effect on the metabolism of enzymes in the liver, and that palmatine has significant DNA toxicity. [33] However, some 9-O-substituted palmatine derivatives exhibited less toxic than palmatine. [34] In addition, palmatine had higher affinity to nucleic acids than serum proteins, which make them suitable candidates for delivery by serum proteins. [35]
Cyclopamine (11-deoxojervine) is a naturally occurring steroidal alkaloid. It is a teratogenic component of corn lily, which when consumed during gestation has been demonstrated to induce birth defects, including the development of a single eye (cyclopia) in offspring. The molecule was named after this effect, which was originally observed by Idaho lamb farmers in 1957 after their herds gave birth to cycloptic lambs. It then took more than a decade to identify corn lily as the culprit. Later work suggested that differing rain patterns had changed grazing behaviours, which led to a greater quantity of corn lily to be ingested by pregnant sheep. Cyclopamine interrupts the sonic hedgehog signalling pathway, instrumental in early development, ultimately causing birth defects.
Chelerythrine is a benzophenanthridine alkaloid present in the plant Chelidonium majus. It is a potent, selective, and cell-permeable protein kinase C inhibitor in vitro. And an efficacious antagonist of G-protein-coupled CB1 receptors. This molecule also exhibits anticancer qualities and it has served as a base for many potential novel drugs against cancer. Structurally, this molecule has two distinct conformations, one being a positively charged iminium form, and the other being an uncharged form, a pseudo-base.
Berberine is a quaternary ammonium salt from the protoberberine group of benzylisoquinoline alkaloids
Tinospora cordifolia is a herbaceous vine of the family Menispermaceae indigenous to tropical regions of the Indian subcontinent. It has been used in Ayurveda to treat various disorders.
Solenopsin is a lipophilic alkaloid with the molecular formula C17H35N found in the venom of fire ants (Solenopsis). It is considered the primary toxin in the venom and may be the component responsible for the cardiorespiratory failure in people who experience excessive fire ant stings.
Serine/threonine-protein kinase PAK 4 is an enzyme that in humans is encoded by the PAK4 gene.
PIN2/TERF1-interacting telomerase inhibitor 1, also known as PINX1, is a human gene. PINX1 is also known as PIN2 interacting protein 1. PINX1 is a telomerase inhibitor and a possible tumor suppressor.
Tetrandrine, a bis-benzylisoquinoline alkaloid, is a calcium channel blocker. It is isolated from the plant Stephania tetrandra, and other Chinese and Japanese herbs.
Dauricine is a plant metabolite, chemically classified as a phenol, an aromatic ether, and an isoquinoline alkaloid. It has been isolated from the Asian vine Menispermum dauricum, commonly known as Asian moonseed, and the North American vine Menispermum canadense, commonly known as Canadian moonseed. Scientists Tetsuji Kametani and Keiichiro Fukumoto of Japan are credited with being the first to synthesize dauricine in 1964, using both the Arndt-Eistert reaction and Bischler-Napieralski reaction to do so. Dauricine has been studied in vitro for its potential to inhibit cancer cell growth and to block cardiac transmembrane Na+, K+, and Ca2+ ion currents.
(S)-Canadine, also known as (S)-tetrahydroberberine and xanthopuccine, is a benzylisoquinoline alkaloid (BIA), of the protoberberine structural subgroup, and is present in many plants from the family Papaveraceae, such as Corydalis yanhusuo and C. turtschaninovii.
Cāng zhú, also known as black atractylodes rhizome or Rhizoma Atractylodes, is a Chinese herbal medicine. It is the dried rhizome of Atractylodes lancea (Thunb.) DC., synonyms Atractylodes chinensis (DC.) Koidz, and Atractylodes japonica Koidz. The medicine is distinguished from bái zhú, which is typically cultivated, whereas cāng zhú more often tends to be collected from the wild. It is believed that the distinction between cāng zhú and bái zhú emerged in relatively modern times; a single drug "zhú" described in the Shen nong ben cao jing probably included many Atractylodes species.
Jatrorrhizine is a protoberberine alkaloid found in some plant species, such as Enantia chlorantha (Annonaceae). Synonyms that may be encountered include jateorrhizine, neprotin, jatrochizine, jatrorhizine, and yatrorizine.
Bufothionine is a sulfur-containing compound which is present in the bufotoxins secreted by the parotoid gland of certain toads of the genera Bufo and Chaunus. This specific compound can be found in the skin of certain species of toad such as the Asiatic Toad, Chaunus arunco, Chaunus crucifer, Chaunus spinulosus, and Chaunus arenarum.
Sonodynamic therapy (SDT) is a noninvasive treatment, often used for tumor irradiation, that utilizes a sonosensitizer and the deep penetration of ultrasound to treat lesions of varying depths by reducing target cell number and preventing future tumor growth. Many existing cancer treatment strategies cause systemic toxicity or cannot penetrate tissue deep enough to reach the entire tumor; however, emerging ultrasound stimulated therapies could offer an alternative to these treatments with their increased efficiency, greater penetration depth, and reduced side effects. Sonodynamic therapy could be used to treat cancers and other diseases, such as atherosclerosis, and diminish the risk associated with other treatment strategies since it induces cytotoxic effects only when externally stimulated by ultrasound and only at the cancerous region, as opposed to the systemic administration of chemotherapy drugs.
Cerevisterol (5α-ergosta-7,22-diene-3β,5,6β-triol) is a sterol. Originally described in the 1930s from the yeast Saccharomyces cerevisiae, it has since been found in several other fungi and, recently, in deep water coral. Cerevisterol has some in vitro bioactive properties, including cytotoxicity to some mammalian cell lines.
Chrysophanol, also known as chrysophanic acid, is a fungal isolate and a natural anthraquinone. It is a C-3 methyl substituted chrysazin of the trihydroxyanthraquinone family.
Eudistomins are β-carboline derivatives, isolated from ascidians, like Ritterella sigillinoides, Lissoclinum fragile, or Pseudodistoma aureum.
Corydaline is an acetylcholinesterase inhibitor isolated from Corydalis yanhusuo.
(S)-Magnoflorine is a quaternary benzylisoquinoline alkaloid (BIA) of the aporphine structural subgroup which has been isolated from various species of the family Menispermaceae, such as Pachygone ovata,Sinomenium acutum, and Cissampelos pareira.
Tropoflavin, also known as 7,8-dihydroxyflavone, is a naturally occurring flavone found in Godmania aesculifolia, Tridax procumbens, and primula tree leaves. It has been found to act as a potent and selective small-molecule agonist of the tropomyosin receptor kinase B (TrkB), the main signaling receptor of the neurotrophin brain-derived neurotrophic factor (BDNF). Tropoflavin is both orally bioavailable and able to penetrate the blood–brain barrier. A prodrug of tropoflavin with greatly improved potency and pharmacokinetics, R13, is under development for the treatment of Alzheimer's disease.