238428-08-5Relevant academic research and scientific papers
Extending the use of tadalafil scaffold: Development of novel selective phosphodiesterase 5 inhibitors and histone deacetylase inhibitors
Abadi, Ashraf H.,Abdel-Halim, Mohammad,Ahmed, Nermin S.,Chen, Yu-Cheng,ElHady, Ahmed K.,Engel, Matthias,Keeton, Adam B.,Liu, Yi-Chang,Piazza, Gary A.,Shih, Shou-Ping
, (2020/04/08)
Herein we present the synthesis and characterization of a novel chemical series of tadalafil analogues that display different pharmacological profiles. Compounds that have the 6R, 12aR configuration and terminal carboxylic acid group at the side chain arising from the piperazinedione nitrogen were potent PDE5 inhibitors, with compound 11 having almost equal potency to tadalafil and superior selectivity over PDE11, the most common off–target for tadalafil. Modifying the stereochemistry into 6S, 12aS configuration and adopting the hydroxamic acid moiety as a terminal group gave rise to compounds that only inhibited HDAC. Dual PDE5/HDAC inhibition could be achieved with compounds having 6R, 12aR configuration and hydroxamic acid moiety as a terminal group. The anticancer activity of the synthesized compounds was evaluated against a diverse number of cell lines of different origin. The compounds elicited anticancer activity against cell lines belonging to lymphoproliferative cancer as well as solid tumors. Despite the previous reports suggesting anticancer activity of PDE5 inhibitors, the growth inhibitory activity of the compounds seemed to be solely dependent on HDAC inhibition. Compound 26 (pan HDAC IC50 = 14 nM, PDE5 IC50 = 46 nM) displayed the most potent anticancer activity in the present series and was shown to induce apoptosis in Molt-4 cells. HDAC isoform selectivity testing for compound 26 showed that it is more selective for HDAC6 and 8 over HDAC1 by more than 20-fold.
Exploration of TRPM8 Binding Sites by β-Carboline-Based Antagonists and Their in Vitro Characterization and in Vivo Analgesic Activities
Bertamino, Alessia,Ostacolo, Carmine,Medina, Alicia,Di Sarno, Veronica,Lauro, Gianluigi,Ciaglia, Tania,Vestuto, Vincenzo,Pepe, Giacomo,Basilicata, Manuela Giovanna,Musella, Simona,Smaldone, Gerardina,Cristiano, Claudia,Gonzalez-Rodriguez, Sara,Fernandez-Carvajal, Asia,Bifulco, Giuseppe,Campiglia, Pietro,Gomez-Monterrey, Isabel,Russo, Roberto
, p. 9672 - 9694 (2020/10/19)
Transient receptor potential melastatin 8 (TRPM8) ion channel represents a valuable pharmacological option for several therapeutic areas. Here, a series of conformationally restricted derivatives of the previously described TRPM8 antagonist N,N′-dibenzyl
Design, synthesis and structure-activity relationship of functionalized tetrahydro-β-carboline derivatives as novel PDE5 inhibitors
Ahmed, Nermin S.,Gary, Bernard D.,Tinsley, Hethar N.,Piazza, Gary A.,Laufer, Stefan,Abadi, Ashraf H.
experimental part, p. 149 - 157 (2011/10/05)
Starting from tadalafil as a template, a series of functionalized tetrahydro-β-carboline derivatives have been prepared and identified as novel potent and selective PDE5 inhibitors. Replacing the 3,4- methylenedioxyphenyl at position 6 of tadalafil, together with elongation of the N2-methyl substituent and manipulation of the stereochemical aspects of the two chiral carbons led to the identification of compound XXI, a highly potent PDE5 inhibitor (IC50 = 3 nM). Compound XXI was also highly selective for PDE5 versus PDE3B, PDE4B, and PDE11A, with a selectivity index of 52 and 235 towards PDE5 rather than PDE11 with both cAMP and cGMP as substrate, respectively.
Synthesis of 2-[3-(7-Chloro-quinolin-4-ylamino)-alkyl]-1-(substituted phenyl)-2,3,4,9-tetrahydro-1H-β-carbolines as a new class of antimalarial agents
Gupta, Leena,Srivastava, Kumkum,Singh, Shubhra,Puri,Chauhan, Prem M.S.
scheme or table, p. 3306 - 3309 (2009/04/11)
A series of hybrid molecules 2-[3-(7-Chloro-quinolin-4-ylamino)-alkyl]-1-(substituted phenyl)-2,3,4,9-tetrahydro-1H-β-carbolines have been synthesized and screened for their in vitro antimalarial activity against chloroquine-sensitive strains of Plasmodium falciparum. Compounds 26, 32, and 34 have shown MIC in the range of 0.05-0.11 μM and are in vitro several folds more active than chloroquine.
Potent 1,3-disubstituted-9H-pyrido[3,4-b]indoles as new lead compounds in antifilarial chemotherapy
Srivastava,Agarwal,Chauhan,Agarwal,Bhaduri,Singh,Fatima,Chatterjee
, p. 1223 - 1236 (2007/10/03)
Substituted 9H-pyrido[3,4-b]indoles (β-carbolines) identified in our laboratory as potential pharmacophore for designing macrofilaricidal agents, have been explored further for identifying the pharmacophore responsible for high order of adulticidal activity. This has led to syntheses and macrofilaricidal evaluations of a number of 1-aryl-9H-pyrido[3,4-b]indole-3-carboxylate derivatives (3-7). The macrofilarical activity was initially evaluated in vivo against Acanthoeilonema viteae. Amongst all the synthesized compounds, only twelve compounds namely 3a, 3c, 3d, 3f, 4c, 4d, 4f, 5a, 6f, 6h, 6i and 7h have exhibited either >90% micro- or macrofilaricidal activity or sterilization of female worms. These compounds have also been screened against Litomosoides carinii and of these only 3f and 5a have also been found to be active. Finally these two compounds have been evaluated against Brugia malayi. The structure activity relationship (SAR) associated with position-1 and 3 substituents in β-carbolines have been discussed. It has been observed that the presence of carbomethoxy at position-3 and an aryl substituent at position-1 in β-carbolines effectively enhance antifilarial activity particularly against A. viteae. Amongst the various compounds screened, methyl 1-(4-methylphenyl)-9H-pyrido[3,4-b]indole-3-carboxylate (4c) has shown highest adulticidal activity and methyl 1-(4-chlorophenyl)-1,2,3,4-tetrahydro-9H-pyrido[3,4-b]indole-3-carboxylate (3a) has shown highest microfilaricidal action against A. viteae at 50mg/kgx5 days (ip). Another derivative of this compound namely 1-(4-chlorophenyl)-3-hydroxymethyl-9H-pyrido[3,4-b]indole (5a) exhibited highest activity against L. carinii at 30mg/kgx5 days (ip) and against B. malayi at 50mg/kgx5 days (ip) or at 200mg/kgx5 days (po). Copyright (C) 1999 Elsevier Science Ltd.
