نشریه علمی مهندسی پزشکی زیستی

Nonlinear Adaptive Control of Mathematical Model of Lung Cancer Tumor Growth using Angiogenic Inhibition

Document Type : Full Research Paper

Authors

1 M.Sc. Student, Department of Electrical and Computer Engineering, University of Mohaghegh Ardabili, Ardabil, Iran

2 Professor, Department of Electrical and Computer Engineering, University of Mohaghegh Ardabili, Ardabil, Iran

3 Assistant Professor, Department of Advanced Technology, University of Mohaghegh Ardabili,, Namin, Iran

Abstract
The primary target of high-dose chemotherapy is the rapidly proliferating tumor cells. Chemotherapy, while beneficial in cancer treatment, also comes with significant side effects. In recent decades, in addition to classical treatment methods, new targeted molecular therapies have emerged, some of which are designed based on mathematical models. Metronomic chemotherapy is a method in which low doses of chemotherapy drugs are given continuously and regularly to treat cancer. This method specifically targets active endothelial cells in new blood vessels. These cells play a supportive role in the tumor and are therefore a suitable target for this therapy. Therefore, biomedical control engineering, based on mathematical modeling, can be a powerful tool for optimizing the treatment process and controlling tumor growth. By providing treatment protocols and adjusting and minimizing the dosage of chemotherapeutic drugs during patient treatment, treatment outcomes can be improved. In this paper, a nonlinear adaptive method for determining the chemotherapy dosage to control the considered model is proposed, relying on the validated mathematical model of lung cancer tumor growth developed by Hahnfeldt et al. The proposed model describes the interactions between endothelial cells, which form the inner lining of blood vessels, and tumor cells in a two-dimensional nonlinear dynamical system. The proposed approach in this research, utilizing a nonlinear model reference adaptive controller, has successfully achieved a significant reduction in both endothelial cell volume and tumor volume while substantially decreasing drug consumption. Simulation results demonstrate that the system variables converged to a safe range within approximately 19 days and continued to decrease until day 24. Ultimately, the volume of variables was reduced to approximately 1 mm3.

Keywords

Subjects


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Volume 18, Issue 1
Spring 2024
Pages 51-64

  • Receive Date 01 July 2024
  • Revise Date 27 October 2024
  • Accept Date 29 October 2024