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New stereoisomeric derivatives of jasmonic acid generated by biotransformation with the fungus Gibberella fujikuroi affect the viability of human cancer cells Electron. J. Biotechnol.
Carvajal,Marcela; Espinoza,Luis; Caggia,Silvia; Cardile,Venera; Garbarino,Juan A; Peña-Cortés,Hugo; Russo,Alessandra.
Background: Several studies have shown that (-)-Jasmonic acid, (+)-7-iso-Jasmonic acid and its methyl ester, methyl jasmonate, have anti-cancer activity in vitro and in vivo, exhibiting selective cytotoxicity towards cancer cells. The degree of activity of these molecules is strongly related to their stereochemistry. The biotransformation of known compounds, natural or synthesized, related to interesting biological activities, generates new molecules displaying new improved properties compared with the original ones, increasing its value and providing new more effective products. Therefore, based on the above rationales and observations, in this work a biotransformation protocol to modify the chemical structure of the plant hormone jasmonic acid by using...
Tipo: Journal article Palavras-chave: Apoptosis; Biotransformations; Cancer cells; Cell vitality; Gibberella fujikuroi; Jasmonic acid.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582011000200007
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Effects of elicitor and copper sulfate on grindelic acid production in submerged cultures of Grindelia pulchella Electron. J. Biotechnol.
Hernandez,Xenia E; Orden,Alejandro A; Giordano,Oscar S; Kurina,Marcela.
Grindelia pulchella callus and cell suspension cultures were established from seedling leaves. When several phytoregulator supplementations were assayed in solid Murashige and Skoog medium containing 3% (w/v) of sucrose (MS medium), combinations of indole-3-butyric acid (IBA) and N6-benzylaminopurine (BA) resulted the most appropriate conditions to generate fast growing friable calli with detectable levels of grindelic acid. Moreover, the same basal media supplemented with 20.0 µM IBA/4.4 µM BA was found to be optimal for cell growth in submerged cultures (µmax = 0.26 days-1) while the addition of 20.0 µM IBA/18.0 µM BA resulted in a relative higher metabolite production (4.55 mg/gDW) when the inocula was 5% (v/v). Furthermore, three different stress...
Tipo: Journal article Palavras-chave: Cu2+; Dimethylsulfoxide permeabilization; Grindelane diterpenes; Jasmonic acid.
Ano: 2005 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582005000300007
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Molecular cloning and expression analysis of 12-oxophytodienoate reductase cDNA by wounding in Solanum tuberosum Electron. J. Biotechnol.
Díaz,Mauricio; Polanco,Victor; Ramírez,Ingrid; Peña-Cortés,Hugo.
Jasmonic acid (JA) and 12-oxophytodienoic acid (OPDA) are signal molecules involved in the stress and defense responses in plants. A full-length cDNA clon of OPR3 encoding 12-oxophytodienoate reductase 3, key enzyme involved in the biosynthesis of JA from linolenic acid was obtained from a Solanum tuberosum cDNA library. Sequence analysis showed that OPR3 encoded a polypeptide of 400 amino acids with a predicted molecular mass of 43.9 kDa and pI of 7.72. The deduced amino acid sequence of OPR3 showed high similarities to other 12-oxophytodienoate reductases. A peroxisomal signal sequence indicates OPR3 probable location in peroxisome. Levels of OPR3 mRNA accumulated in potato leaves reaching maximum levels within 1 hr of mechanical wounding. Elevated...
Tipo: Journal article Palavras-chave: 12-oxophytodienoate reductase; Jasmonic acid; OPDA; Solanum tuberosum; Stress; Wounding.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582012000100010
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