Littérature scientifique sur le sujet « ISOPETASINA »
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Articles de revues sur le sujet "ISOPETASINA"
Witschel, Matthias Christian, et Hans Jürgen Bestmann. « Synthese der Pestwurzinhaltsstoffe (+)-Petasin und (+)-Isopetasin ». Tetrahedron Letters 36, no 19 (mai 1995) : 3325–28. http://dx.doi.org/10.1016/0040-4039(95)00475-r.
Texte intégralWitschel, Matthias C., et Hans Jürgen Bestmann. « The Total Synthesis of (+)-Petasin and (+)-Isopetasin ». Synthesis 1997, no 01 (janvier 1997) : 107–12. http://dx.doi.org/10.1055/s-1997-1492.
Texte intégralWITSCHEL, M. C., et H. J. BESTMANN. « ChemInform Abstract : The Total Synthesis of (+)-Petasin and (+)-Isopetasin. » ChemInform 28, no 23 (3 août 2010) : no. http://dx.doi.org/10.1002/chin.199723211.
Texte intégralUrda, Lorena, Matthias Heinrich Kreuter, Jürgen Drewe, Georg Boonen, Veronika Butterweck et Thomas Klimkait. « The Petasites hybridus CO2 Extract (Ze 339) Blocks SARS-CoV-2 Replication In Vitro ». Viruses 14, no 1 (7 janvier 2022) : 106. http://dx.doi.org/10.3390/v14010106.
Texte intégralWITSCHEL, M. C., et H. J. BESTMANN. « ChemInform Abstract : Synthesis of (+)-Petasin and (+)-Isopetasin, Constituents of Petasitis hybridus. » ChemInform 26, no 35 (17 août 2010) : no. http://dx.doi.org/10.1002/chin.199535301.
Texte intégralThomet, O. A. R., U. N. Wiesmann, K. Blaser et H. U. Simon. « Differential inhibition of inflammatory effector functions by petasin, isopetasin and neopetasin in human eosinophils ». Clinical & ; Experimental Allergy 31, no 8 (août 2001) : 1310–20. http://dx.doi.org/10.1046/j.1365-2222.2001.01158.x.
Texte intégralLin, Ling-Hung, Tzu-Jung Huang, Sheng-Hao Wang, Yun-Lian Lin, Sheng-Nan Wu et Wun-Chang Ko. « Bronchodilatory effects of S-isopetasin, an antimuscarinic sesquiterpene of Petasites formosanus, on obstructive airway hyperresponsiveness ». European Journal of Pharmacology 584, no 2-3 (avril 2008) : 398–404. http://dx.doi.org/10.1016/j.ejphar.2008.02.034.
Texte intégralKo, Wun-Chang, Sheng-Hao Wang, Mei-Chun Chen, Yun-Lian Lin et Chieh-Fu Chen. « S-Isopetasin, A Sesquiterpene of Petasites formosanus, Allosterically Antagonized Carbachol in Isolated Guinea Pig Atria ». Planta Medica 68, no 7 (juillet 2002) : 652–55. http://dx.doi.org/10.1055/s-2002-32905.
Texte intégralBenemei, Silvia, Francesco De Logu, Simone Li Puma, Ilaria Maddalena Marone, Elisabetta Coppi, Filippo Ugolini, Wolfgang Liedtke et al. « The anti-migraine component of butterbur extracts, isopetasin, desensitizes peptidergic nociceptors by acting on TRPA1 cation channel ». British Journal of Pharmacology 174, no 17 (20 juillet 2017) : 2897–911. http://dx.doi.org/10.1111/bph.13917.
Texte intégralDisch, Lucia, Kristina Forsch, Beate Siewert, Jürgen Drewe et Gert Fricker. « In Vitro and In Situ Absorption and Metabolism of Sesquiterpenes from Petasites hybridus Extracts ». Planta Medica 84, no 11 (16 janvier 2018) : 795–805. http://dx.doi.org/10.1055/s-0044-100401.
Texte intégralThèses sur le sujet "ISOPETASINA"
Puma, Simone Li. « Ruolo dei canali Transient Receptor Potential (TRP) espressi in cellule neuronali e non neuronali, nelle patologie dolorose di origine infiammatoria e neuropatica ». Doctoral thesis, 2020. http://hdl.handle.net/2158/1206841.
Texte intégralHuang, Tzu-Jung, et 黃子容. « Mechanisms of antiasthmatic action of S-petasin and S-isopetasin, sesquiterpenes of petasites formosanus ». Thesis, 2007. http://ndltd.ncl.edu.tw/handle/31364321995586500372.
Texte intégral臺北醫學大學
藥理學研究所
95
PDE4 is present in inflammatory cells and bronchial smooth muscles. The increased cAMP level by PDE4 inhibitors leads to have bronchodilator and anti-inflammatory effects. Petasites formosanus Kitamura, a perennial herb, is used as a folk medicine for treating hypertension, tumor and asthma in Taiwan. In the present study, we investigated mechanisms of antiasthmatic action of S-petasin and S-isopetasin, the main constituents of the plant. First, S-petasin has proven to concentration-dependently inhibit PDE3/4 activities with a respective IC50 value of 27.55 and 16.56 μM, which did not significantly differ from each other. According to the Lineweaver-Burk analysis, S-petasin (3~30 μM) competitively inhibited PDE3/4 activities, and had a Ki value of 27.6 and 23.3 μM, respectively, which also did not differ from each other. However, S-isopetasin had no effect on PDE1~PDE5 (IC50 > 100 μM). The airway hyperresponsiveness (AHR) was measured in unrestrained, sensitized and OVA-secondarily challenged BALB/c mice by barometric plethysmography using a whole-body plethysmograph after exposure of methacholine (MCh, 6.25~50 mg/ml). In the present results, S-petasin (10~30 μmol/kg, s.c. or 30~100 μmol/kg, p.o.) dose-dependently and significantly attenuated the enhanced pause (Penh) value induced by MCh (50 mg/ml) and significantly suppressed the increase of total inflammatory cells, eosinophils, neutrophils, and lymphocytes, and also significantly attenuated the release of IL-2, IL-4, IL-5, IFN-γ and TNF-α in bronchoalveolar lavage fluid (BALF) of the mice with some exceptions at lower dose. It also significantly reduced total and OVA-specific IgE in serum and in BALF. In the opposite, it dose-dependently and significantly increased IgG2a in serum suggesting that the anti-inflammation was potentiated. S-petasin displaced [3H]-rolipram from high affinity rolipram binding sites (HARBS) of particulates of whole brains isolated from sensitized guinea pigs, with an EC50 value beyond 300 μM. Therefore, the PDE4H/PDE4L ratio (> 300 μM/16.56 μM) of S-petasin was beyond 18. S-petasin did not shorten the duration of anathesia induced by xylazine/ketamine, suggesting that its adverse effect, such as nausea, vomiting and gastric hypersecretion, may be little. S-petasin (30~300 μM) and S-isopetasin (30~300 μM) significantly relaxed the baseline tension, but did not suppress cumulative OVA (10~100 μg/ml)-induced contractions in isolated sensitized guinea pig trachealis. S-isopetasin (30~300 μM) competitively antagonized cumulative ACh-induced contractions in guinea pig trachealis, because the slope of Schild plot did not significantly differ from unity. The pA2 value of S-isopetasin was calculated to be 4.70 ± 0.66 (n=18). According to the analysis of Scatchard plot, the muscarinic receptor binding sites in cultured human tracheal smooth muscle cells (HTSMCs) revealed a single population (Hill coefficient 1.00). The equilibrium dissociation constant (Kd) and the maximal receptor density (Bmax) for [3H]-NMS binding were 766 pM and 0.189 pmol/mg of protein, respectively. The –logIC50 value of S-isopetasin, methoctramine and 4-DAMP for displacing 0.4 nM [3H]-NMS specific binding was 5.05, 6.25, and 8.56, respectively, suggesting that the [3H]-NMS binding is predominantly on M3 cholinoceptors of cultured HTSMCs. The potency of S-petasin for displacing [3H]-NMS binding in cultured HTSMCs appeared greater (about 2.2-fold) than that against cumulative ACh-induced contractions in guinea pig trachealis, suggesting that S-isopetasin may be more effective in human airway smooth muscles than in guinea pig trachealis. Threfore, S-isopetasin may have benefits as a bronchodilator for treating asthma. In conclusion, S-petasin selectively and competitively inhibited PDE3/4 activities, and potentiated its anti-inflammatory and bronchodilator effects. S-isopetasin antagonized the activation of M3 cholinoceptors of cultured HTSMCs and had bronchodilator effect. The above results suggest that S-petasin and S-isopetasin may have the potential for treating asthma.
Chapitres de livres sur le sujet "ISOPETASINA"
« 3α-Angeloyloxy-eremophila-9(10),7(11)-dien-8-one (Iso-Petasin ; Isopetasin) ». Dans Natural Compounds, 502–3. New York, NY : Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-0539-9_1009.
Texte intégral« 3α-[(Z)-3-Methylthioacryloyloxy]-eremophila-9(10),7(11)-dien-8-one (Iso-S-Petasin ; S-Isopetasin) ». Dans Natural Compounds, 530. New York, NY : Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-0539-9_1061.
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