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Research Article Open access CC BY 3.0

QSAR Rationale of Matrix Metalloproteinase Inhibition Activity in a Class of Carboxylic Acid Based Compounds

B. K. Sharma, P. Singh, Y. S. Prabhakar

Journal of Pharmaceutical Research International · pp. 697–721 · Published 16 Jun 2013

10.9734/BJPR/2013/3903

Abstract

The matrix metalloproteinase-13 (MMP-13) inhibitory activities of carboxylic acid based compounds, in presence and absence of bovine serum albumin (BSA), have been analyzed quantitatively in terms of chemometric descriptors. The statistically validated quantitative structure-activity relationship (QSAR) models obtained through combinatorial protocol in multiple linear regression (CP-MLR) analysis and the participated descriptors in these models provided rationales to explain the inhibitory activities of these congeners. For MMP-13 inhibition activity, the identified descriptors (BEHm1, BELm1 and BEHm8) have highlighted the role of the atomic mass in terms of the highest and lowest eigenvalues derived from Burden matrix. The positive correlation with activity suggested that their higher values are desirable in improving the activity of a compound. Additionally, the descriptor C-027 representing R-CH-X type fragment in a molecular structure advocates the absence of such type of fragment for the improved activity. On the other hand presence of RCO-N< or >N-X=X type fragment (descriptor N-072) would be beneficiary to the MMP-13 inhibitory activity. The structural features, rationalized by the descriptors MSD (Balaban’s mean square distance index), nCrHR (number of ring tertiary C (sp3), H-047 (H attached to C1(sp3)/C0(sp2)) and H-050 (H attached to heteroatom) have imparted positive impact on the MMP-13 w/BSA inhibition activity. The atomic properties such as atomic polarizability and atomic Sanderson’s electronegativity have shown their positive impact on the activity via descriptors BELp4 and GATS3e in respective eigenvalues or lag. The other descriptors, MATS1m and MATS3e, have revealed the negative influence of atomic mass and electronegativity on the of MMP-13 w/BSA inhibition activity. The results obtained from CP-MLR analysis have been supported further through partial least-squares (PLS) study.

Matrix metalloproteinase inhibitors carboxylic acid based compounds chemometric descriptors combinatorial protocol in multiple linear regression (CP-MLR) analysis QSAR

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