Title:Multivariate Statistical 2D QSAR Analysis of Indenoisoquinoline-based Topoisomerase-
I Inhibitors as Anti-lung Cancer Agents
Volume: 23
Issue: 20
Author(s): Supriya Singh, Bharti Mangla*, Shamama Javed, Pankaj Kumar and Waquar Ahsan*
Affiliation:
- Department of Pharmaceutics, Delhi Pharmaceutical Sciences and Research University, New Delhi, 110017, India
- Department of Pharmaceutical Chemistry,
College of Pharmacy, Jazan University, PO. Box No. 114, Jazan, Saudi Arabia
Keywords:
Indenoisoquinoline, lung cancer, QSAR, multiple linear regression, partial least-square, artificial neural network.
Abstract:
Background: Indenoisoquinoline-based compounds have shown promise as topoisomerase-I inhibitors,
presenting an attractive avenue for rational anticancer drug design. However, a detailed QSAR study on
these derivatives has not been performed till date.
Objective: This study aimed to identify crucial molecular features and structural requirements for potent topoisomerase-
1 inhibition.
Methods: A comprehensive two-dimensional (2D) QSAR analysis was performed on a series of 49 indenoisoquinoline
derivatives using TSAR3.3 software. A robust QSAR model based on a training set of 33 compounds
was developed achieving favorable statistical values: r2 = 0.790, r2CV = 0.722, f = 36.461, and s = 0.461. Validation
was conducted using a test set of nine compounds, confirming the predictive capability of the model (r2 =
0.624). Additionally, artificial neural network (ANN) analysis was employed to further validate the significance
of the derived descriptors.
Results: The optimized QSAR model revealed the importance of specific descriptors, including molecular volume,
Verloop B2, and Weiner topological index, providing essential insights into effective topoisomerase-1 inhibition.
We also obtained a robust partial least-square (PLS) analysis model with high predictive ability (r2 =
0.788, r2CV = 0.743). The ANN results further reinforced the significance of the derived descriptors, with strong
r2 values for both the training set (r2 = 0.798) and the test set (r2 = 0.669).
Conclusion: The present 2D QSAR analysis offered valuable molecular insights into indenoisoquinoline-based topoisomerase-
I inhibitors, supporting their potential as anti-lung cancer agents. These findings contribute to the rational design
of more effective derivatives, advancing the development of targeted therapies for lung cancer treatment.