Decrypting Strong and Weak Single-Walled Carbon Nanotubes Interactions with Mitochondrial Voltage-Dependent Anion Channels Using Molecular Docking and Perturbation Theory

Sci Rep. 2017 Oct 16;7(1):13271. doi: 10.1038/s41598-017-13691-8.

Abstract

The current molecular docking study provided the Free Energy of Binding (FEB) for the interaction (nanotoxicity) between VDAC mitochondrial channels of three species (VDAC1-Mus musculus, VDAC1-Homo sapiens, VDAC2-Danio rerio) with SWCNT-H, SWCNT-OH, SWCNT-COOH carbon nanotubes. The general results showed that the FEB values were statistically more negative (p < 0.05) in the following order: (SWCNT-VDAC2-Danio rerio) > (SWCNT-VDAC1-Mus musculus) > (SWCNT-VDAC1-Homo sapiens) > (ATP-VDAC). More negative FEB values for SWCNT-COOH and OH were found in VDAC2-Danio rerio when compared with VDAC1-Mus musculus and VDAC1-Homo sapiens (p < 0.05). In addition, a significant correlation (0.66 > r2 > 0.97) was observed between n-Hamada index and VDAC nanotoxicity (or FEB) for the zigzag topologies of SWCNT-COOH and SWCNT-OH. Predictive Nanoparticles-Quantitative-Structure Binding-Relationship models (nano-QSBR) for strong and weak SWCNT-VDAC docking interactions were performed using Perturbation Theory, regression and classification models. Thus, 405 SWCNT-VDAC interactions were predicted using a nano-PT-QSBR classifications model with high accuracy, specificity, and sensitivity (73-98%) in training and validation series, and a maximum AUROC value of 0.978. In addition, the best regression model was obtained with Random Forest (R2 of 0.833, RMSE of 0.0844), suggesting an excellent potential to predict SWCNT-VDAC channel nanotoxicity. All study data are available at https://doi.org/10.6084/m9.figshare.4802320.v2 .

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Humans
  • Mitochondria / chemistry
  • Mitochondria / metabolism
  • Molecular Docking Simulation
  • Nanotubes, Carbon / chemistry*
  • Voltage-Dependent Anion Channel 1 / chemistry
  • Voltage-Dependent Anion Channel 1 / metabolism
  • Voltage-Dependent Anion Channel 2 / chemistry
  • Voltage-Dependent Anion Channel 2 / metabolism
  • Voltage-Dependent Anion Channels / chemistry
  • Voltage-Dependent Anion Channels / metabolism

Substances

  • Nanotubes, Carbon
  • VDAC1 protein, human
  • VDAC2 protein, human
  • Voltage-Dependent Anion Channel 2
  • Voltage-Dependent Anion Channels
  • Voltage-Dependent Anion Channel 1