23838-17-7Relevant academic research and scientific papers
Farnesyloxycoumarins, a new class of squalene-hopene cyclase inhibitors
Cravotto, Giancarlo,Balliano, Gianni,Robaldo, Bruna,Oliaro-Bosso, Simonetta,Chimichi, Stefano,Boccalini, Marco
, p. 1931 - 1934 (2004)
A few naturally occurring prenyl- and prenyloxycoumarins and several new related synthetic derivatives were evaluated as inhibitors of squalene-hopene cyclase (SHC), a useful model enzyme, to predict their interactions with oxidosqualene cyclase (OSC). Umbelliprenin-10′,11′-monoepoxide (IC50 2.5 μM) and the corresponding 6′,7′-10′, 11′ diepoxide (IC50 1.5 μM) were the most active enzyme inhibitors.
Investigation of the cytotoxicity of bioinspired coumarin analogues towards human breast cancer cells
Gkionis, Leonidas,Kavetsou, Eleni,Kalospyros, Alexandros,Manousakis, Dimitris,Garzon Sanz, Miguel,Butterworth, Sam,Detsi, Anastasia,Tirella, Annalisa
, p. 307 - 321 (2020/05/06)
Abstract: Coumarins possess a wide array of therapeutic capabilities, but often with unclear mechanism of action. We tested a small library of 18 coumarin derivatives against human invasive breast ductal carcinoma cells with the capacity of each compound to inhibit cell proliferation scored, and the most potent coumarin analogues selected for further studies. Interestingly, the presence of two prenyloxy groups (5,7-diprenyloxy-4-methyl-coumarin, 4g) or the presence of octyloxy substituent (coumarin 4d) was found to increase the potency of compounds in breast cancer cells, but not against healthy human fibroblasts. The activity of potent compounds on breast cancer cells cultured more similarly to the conditions of the tumour microenvironment was also investigated, and increased toxicity was observed. Results suggest that tested coumarin derivatives could potentially reduce the growth of tumour mass. Moreover, their use as (combination) therapy in cancer treatment might have the potential of causing limited side effects. Graphic abstract: [Figure not available: see fulltext.].
O-prenylated carbostyrils as a novel class of 15-lipoxygenase inhibitors: Synthesis, characterization, and inhibitory assessment
Alavi, Seyed Jamal,Zebarjadi, Amir,Bafghi, Mahdi Hosseini,Orafai, Hossein,Sadeghian, Hamid
, p. 894 - 902 (2021/09/08)
Catalyzed peroxidation of unsaturated lipid in animals and plants intimately is linked to the activity of 15-Lipoxygenase enzymes. Lipoxygenases (LOXs) are well known to play an important role in many acute and chronic syndromes such as inflammation, asthma, cancer, and allergy. In this study, a series of mono prenyloxycarbostyrils were synthesized and evaluated as potential inhibitors of soybean 15-Lipoxygenase (SLO) and their inhibitory potencies were compared to mono prenyloxycoumarins which had been reported in the previous works. The synthetic compounds inhibit lipoxygenase enzyme by competitive mechanism like the prenyloxy coumarins. The results showed that position and length of the prenyl moiety play the important role in lipoxygenase inhibitory activity. Among all of the synthetic compounds (coumarin and carbostyril derivatives), 5-farnesyloxycoumarin and 8-farnesyloxycarbostyril demonstrated the best inhibitory activity by IC50?values of 1.1?μM and 0.53?μM, respectively.
Natural and semisynthetic oxyprenylated aromatic compounds as stimulators or inhibitors of melanogenesis
Genovese, Salvatore,Epifano, Francesco,Medina, Philippe de,Caron, Nicolas,Rives, Arnaud,Poirot, Marc,Poirot, Sandrine Silvent,Fiorito, Serena
, p. 181 - 190 (2019/03/23)
It has been very recently shown how naturally occurring oxyprenylated coumarins are effective modulators of melanogenesis. In this short communication we wish to generalize the potentialities as skin tanning or whitening agents of a wider panel of natural and semisynthetic aromatic compounds, including coumarins, cinnamic and benzoic acids, cinnamaldehydes, benzaldehyde, and anthraquinone derivatives. A total number of 43 compounds have been tested assaying their capacity to inhibit or stimulate melanin biosynthesis in cultured murine Melan A cells. The wider number of chemicals herein under investigation allowed to depict a detailed structure-activity relationship, as the following: (a) benzoic acid derivatives are slightly pigmenting agent, for which the effect is more pronounced in compounds with longer O-side chains; (b) independently from the type of substitution, cinnamic acids are able to increase melanin biosynthesis, while benzaldehydes are able to decrease it; (c) coumarins with a 3,3-dimethylallyl or shorter skeletons as substituents in position 7 are tanning agents, while coumarins with farnesyloxy groups are whitening ones; (d) double oxyprenylation in position 6 and 7 and 3,3-dimethylallyl or geranyl skeletons have slight depigmenting capacities, while farnesyl skeletons tend to marginally increase the tanning effect; (e) the presence of electron withdrawing groups (acetyl, COOH, and -Cl) and geranyl or farnesyl oxyprenylated chains respectively in positions 3 and 7 of the coumarin nucleus lead to a whitening effect, and finally (f) oxyprenylated anthraquinones have only a weak depigmenting capacity.
Combined molecular modeling and cholinesterase inhibition studies on some natural and semisynthetic O-alkylcoumarin derivatives
Orhan, Ilkay Erdogan,Senol Deniz, F. Sezer,Salmas, Ramin Ekhteiari,Durdagi, Serdar,Epifano, Francesco,Genovese, Salvatore,Fiorito, Serena
, p. 355 - 362 (2018/12/13)
Coumarins of synthetic or natural origins are an important chemical class exerting diverse pharmacological activities. In the present study, 26 novel O-alkylcoumarin derivatives were synthesized and have been tested at 100 μM for their in vitro inhibitory potential against acetylcholinesterase (AChE) and butyrlcholinesterase (BChE) targets which are the key enzymes playing role in the pathogenesis of Alzheimer's disease. Among the tested coumarins, none of them could inhibit AChE, whereas 12 of them exerted a marked and selective inhibition against BChE as compared to the reference (galanthamine, IC50 = 46.58 ± 0.91 μM). In fact, 10 of the active coumarins showed higher inhibition (IC50 = 7.01 ± 0.28 μM – 43.31 ± 3.63 μM) than that of galanthamine. The most active ones were revealed to be 7-styryloxycoumarin (IC50 = 7.01 ± 0.28 μM) and 7-isopentenyloxy-4-methylcoumarin (IC50 = 8.18 ± 0.74 μM). In addition to the in vitro tests, MetaCore/MetaDrug binary QSAR models and docking simulations were applied to evaluate the active compounds by ligand-based and target-driven approaches. The predicted pharmacokinetic profiles of the compounds suggested that the compounds reveal lipophilic character and permeate blood brain barrier (BBB) and the ADME models predict higher human serum protein binding percentages (>50%) for the compounds. The calculated docking scores indicated that the coumarins showing remarkable BChE inhibition possessed favorable free binding energies in interacting with the ligand-binding domain of the target. Therefore, our results disclose that O-alkylcoumarins are promising selective inhibitors of cholinesterase enzymes, particularly BChE in our case, which definitely deserve further studies.
Natural oxyprenylated coumarins are modulators of melanogenesis
Fiorito, Serena,Epifano, Francesco,Preziuso, Francesca,Cacciatore, Ivana,di Stefano, Antonio,Taddeo, Vito Alessandro,de Medina, Philippe,Genovese, Salvatore
, p. 274 - 282 (2018/05/14)
Naturally occurring coumarins 7-isopentenyloxycoumarin, auraptene, and umbelliprenin are able to modulate the biosynthesis of melanin in murine Melan-a cells probably through the interaction with selected biological targets like estrogen receptor β and aryl hydrocarbon receptor. Such a modulation strictly depends on the individual structure of the coumarin: the presence of a 3,3-dimethylallyloxy side chain is a structural determinant for tanning activation whereas a farnesyl one leads to the opposite effect. The parent compound with a free OH group, umbelliferone, did not provide any interaction. Other coumarins assayed, having shorter chains and/or being substituted in other positions, and prenyloxypsoralens, were not active or not further investigated in this context being cytotoxic at low doses.
SKIN PIGMENTATION MODIFIERS TO DARKEN OR LIGHTEN THE SKIN
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Page/Page column 27-28, (2016/12/22)
The present invention relates to a method for changing the pigmentation of a skin, a mucous membrane or hair with a compound of general formula (I), a cosmetic use of said compound of general formula (I), to cosmetic compositions comprising said compound of general formula (I), and to new depigmenting agents.
Synthesis and biological evaluation of isoprenylated coumarins as potential anti-pancreatic cancer agents
Jun, Maria,Bacay, Alyssa F.,Moyer, James,Webb, Andrew,Carrico-Moniz, Dora
supporting information, p. 4654 - 4658 (2015/01/09)
A series of isoprenylated coumarins has been designed, synthesized, and evaluated against human pancreatic adenocarcinoma cell line PANC-1 under nutrient-rich and nutrient-deprived conditions. The compounds described investigate the effect of isoprenyl chain length and positioning on cell growth inhibition. The majority of these compounds displayed cytotoxicity against PANC-1 cells selectively in the absence of essential amino acids, glucose, and serum, and showed no cytotoxicity under nutrient-rich conditions. In this study, compound 6 exhibited the highest cytotoxic activity with an LC50value of 4 μM and induced apoptosis-like morphological changes in PANC-1 cells after a 24-h incubation. The evaluated structure-activity relationships show that substitution at the 6-position and the presence of a farnesyl isoprenyl tail are important structural features for enhanced preferential cytotoxicity. These findings provide important information to designing other structural analogues for potential application as novel pancreatic antitumor agents.
Synthesis and SAR studies of mono O-prenylated coumarins as potent 15-lipoxygenase inhibitors
Iranshahi, Mehrdad,Jabbari, Atena,Orafaie, Ala,Mehri, Robabeh,Zeraatkar, Soudabeh,Ahmadi, Taraneh,Alimardani, Maliheh,Sadeghian, Hamid
, p. 134 - 142 (2013/01/15)
All of the mono isopentenyloxy, -geranyloxy and -farnesyloxy derivatives of coumarin were synthesized and their inhibitory potency against soybean 15-lipoxygenase (SLO) and human 15-lipoxygenase-1 (HLO-1) were determined. Amongst the synthetic analogs, 5-farnesyloxycoumarin showed the most potent inhibitory activity against SLO (IC50 = 0.8 μM) while 6-farnesyloxycoumarin was the strongest HLO-1 inhibitor (IC50 = 1.3 μM). The IC50 variations of the farnesyl derivatives for HLO-1 (1.3 to ~75 μM) were much higher than that observed for SLO (0.8-5.8 μM). SAR studies showed that hydrogen bonding, CH/π, anion-π and S-OC interactions with FeIII-OH, Leu408, Glu357 and Met419 were the distinct intermolecular interactions which can lead to important role of the coumarin substitution site in HLO-1 inhibitory potency, respectively.
Selective monocyclization of epoxy terpenoids promoted by zeolite NaY. A short biomimetic synthesis of elegansidiol and farnesiferols B-D
Tsangarakis, Constantinos,Arkoudis, Elias,Raptis, Christos,Stratakis, Manolis
, p. 583 - 586 (2008/02/02)
Epoxy terpenes cyclize readily, by confinement within zeolite NaY, to form exomethylenic cyclohexanols as the major products. The selective monocyclization of 10,11-epoxyfarnesyl acetate within NaY provides a short and efficient biomimetic route to (±)-elengasidiol and (±)-farnesiferols B-D.
