International Journal of Nanomedicine (Jul 2021)

Structural Deformation of MTX Induced by Nanodrug Conjugation Dictate Intracellular Drug Transport and Drug Efficacy

  • Park JY,
  • Hyun JS,
  • Jee JG,
  • Park SJ,
  • Khang D

Journal volume & issue
Vol. Volume 16
pp. 4943 – 4957

Abstract

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Jun-Young Park,1 Ja-Shil Hyun,2 Jun-Goo Jee,3 Sung Jean Park,2 Dongwoo Khang1,4 1Lee Gil Ya Cancer and Diabetes Institute, Gachon University, Incheon, 21999, Republic of Korea; 2College of Pharmacy and Gachon Institute of Pharmaceutical Sciences, Gachon University, Incheon, 21936, Republic of Korea; 3Research Institute of Pharmaceutical Sciences, College of Pharmacy, Kyungpook National University, Daegu, 41566, Republic of Korea; 4Department of Physiology, College of Medicine, Gachon University, Incheon, 21999, Republic of KoreaCorrespondence: Dongwoo KhangDepartment of Physiology, College of Medicine, Gachon University, Incheon, 21999, South KoreaTel +82-32-899-6515Email [email protected] Jean ParkCollege of Pharmacy and Gachon Institute of Pharmaceutical Sciences, Gachon University, Incheon, 21936, Republic of KoreaTel +82-32-899-6113Email [email protected]: Understanding structural interactions between the active drug and conjugated nanoparticles is critical for optimizing intracellular drug transport and for increasing nano drug efficacy. In this regard, analyzing the conformational deformation of conjugated drugs surrounding nanoparticles is essential to understand the corresponding nanodrug efficacy.Purpose: The objective of this study is to present an optimal synthesis method for efficient drug delivery through a clear structural analysis of nanodrugs according to the type of conjugation.Methods and Results: In this study, the structural variation of methotrexate (MTX) surrounding carbon nanotubes, depending on the type of conjugation style, such as covalent and non-covalent (PEGylation) bonds, was investigated. Specifically, covalent bonds of MTX surrounding CNTs induced greater structural deformation compared to non-covalent bonds (ie, PEGylated CNT).Conclusion: Greater changes in the structural variations of MTX analyzed by nuclear magnetic resonance (NMR) significantly improved the anti-inflammatory drug efficacy of human fibroblast-like synovial cells (FLS) via stable drug release in the extracellular environment and burst drug release under intracellular conditions.Keywords: structural deformation, methotrexate, covalent conjugation, rheumatoid arthritis, carbon nanotube

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