title: Three-dimensional quantitative structure-activity relationship CoMSIA/CoMFA and LeapFrog studies on novel series of bicyclo [4.1.0] heptanes derivatives as melanin-concentrating hormone receptor R1 antagonists.
abstract: Comparative molecular similarity indices analysis (CoMSIA) and comparative molecular field analysis (CoMFA) were performed on a series of bicyclo [4.1.0] heptanes derivatives as melanin-concentrating hormone receptor R1 antagonists (MCHR1 antagonists). Molecular superimposition of antagonists on the template structure was performed by database alignment method. The statistically significant model was established on sixty five molecules, which were validated by a test set of ten molecules. The CoMSIA model yielded the best predictive model with a q(2) = 0.639, non cross-validated R(2) of 0.953, F value of 92.802, bootstrapped R(2) of 0.971, standard error of prediction = 0.402, and standard error of estimate = 0.146 while the CoMFA model yielded a q(2) = 0.680, non cross-validated R(2) of 0.922, F value of 114.351, bootstrapped R(2) of 0.925, standard error of prediction = 0.364, and standard error of estimate = 0.180. CoMFA analysis maps were employed for generating a pseudo cavity for LeapFrog calculation. The contour maps obtained from 3D-QSAR studies were appraised for activity trends for the molecules analyzed. The results show the variability of steric and electrostatic contributions that determine the activity of the MCHR1 antagonist, with these results we proposed new antagonists that may be more potent than previously reported, these novel antagonists were designed from the addition of highly electronegative groups in the substituent di(i-C(3)H(7))N- of the bicycle [4.1.0] heptanes, using the model CoMFA which also was used for the molecular design using the technique LeapFrog. The data generated from the present study will further help to design novel, potent, and selective MCHR1 antagonists.
authors.affiliation: Grupo de Química Cuántica y Teórica, Universidad de Cartagena, Programa de Química, Facultad de Ciencias Exactas y Naturales, Cartagena, Colombia.
authors.forename: Alejandro
authors.initials: A
authors.lastname: Morales-Bayuelo
authors.forename: Hernan
authors.initials: H
authors.lastname: Ayazo
authors.forename: Ricardo
authors.initials: R
authors.lastname: Vivas-Reyes
mesh_terms: D001643:Bridged Bicyclo Compounds / Q000737:chemistry / Q000494:pharmacology; D055808:Drug Discovery; D006536:Heptanes / Q000737:chemistry* / Q000494:pharmacology*; D006801:Humans; D008958:Models, Molecular; D009765:Obesity / Q000188:drug therapy; D021281:Quantitative Structure-Activity Relationship; D011979:Receptors, Pituitary Hormone / Q000037:antagonists & inhibitors* / Q000378:metabolism; D017481:Receptors, Somatostatin / Q000037:antagonists & inhibitors / Q000378:metabolism; D012984:Software
chemical_list: D001643:Bridged Bicyclo Compounds; D006536:Heptanes; C103263:MCHR1 protein, human; D011979:Receptors, Pituitary Hormone; D017481:Receptors, Somatostatin; C092274:melanin-concentrating hormone receptor