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Star-Shaped Poly (Ε-Caprolactone)-B-Poly [2-(Dimethylamino) Ethyl Methacrylate]-B-Poly (N-Isopropyl Acrylamide) As Ph- and Thermo-Responsive Doxorubicin Nanocarriers for Leukemia Therapy: Experimental and Simulation Studies Publisher



Bastani K1 ; Sakhaee K1 ; Ahmadpoursamani P1 ; Khatibi A1 ; Zahedi P1 ; Akrami M2 ; Jafari SH1
Authors
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Authors Affiliations
  1. 1. Nano-Biopolymers Research Laboratory, School of Chemical Engineering, College of Engineering, University of Tehran, P. Box: 11155-4563, Tehran, Iran
  2. 2. Department of Pharmaceutical Biomaterials and Medical Biomaterials Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran

Source: Journal of Industrial and Engineering Chemistry Published:2025


Abstract

Doxorubicin (DOX) nanocarriers based on star-shaped terpolymer poly(ε-caprolactone)-b-poly[2-(dimethylamino) ethyl methacrylate]-b-poly (N-isopropyl acrylamide) [PCL-b-PDMAEMA-b-PNIPAAm] (NPs) were synthesized with three degrees of polymerization (DP = 50, 100, and 200) for each block and three different block ratios of PNIPAAm/PDMAEMA (0.25, 1, and 4). Their structures were characterized using FTIR, 1H NMR, GPC, turbidometry, and FE-SEM tests. Moreover, the drug loading capacity and encapsulation efficiency were obtained experimentally at 14.91 % and 75 % for the optimal sample (S5), while the simulation ones accounted for 12.95 % and 69.91 % through novel modeling. The in vitro drug release study demonstrated the thermo- and pH-responsive behaviors of NPs (at temperatures of 308 and 318 K, pHs of 5.5 and 7.4), validating the simulation results. The efficacy of DOX-loaded S5 for human myeloid leukemia treatment (U937 cell line) was investigated through hemolysis, MTT, and flow cytometry. Based on the results, the S5 delivered more efficient therapeutic performance than free DOX against U937 cells. Finally, an innovative in vitro molecular dynamics simulation study assessed the interactions between the human serum albumin, fibrinogen proteins, and S5. Accordingly, the cohesive energy densities for human serum albumin and fibrinogen were measured at 4.42 and 42.52 Cal/cm3, respectively, indicating further fibrinogen adhesion with S5. © 2024 The Korean Society of Industrial and Engineering Chemistry