Human dopamine receptor nanovesicles for gate-potential modulators in high-performance field-effect transistor biosensors

Sci Rep. 2014 Mar 11:4:4342. doi: 10.1038/srep04342.

Abstract

The development of molecular detection that allows rapid responses with high sensitivity and selectivity remains challenging. Herein, we demonstrate the strategy of novel bio-nanotechnology to successfully fabricate high-performance dopamine (DA) biosensor using DA Receptor-containing uniform-particle-shaped Nanovesicles-immobilized Carboxylated poly(3,4-ethylenedioxythiophene) (CPEDOT) NTs (DRNCNs). DA molecules are commonly associated with serious diseases, such as Parkinson's and Alzheimer's diseases. For the first time, nanovesicles containing a human DA receptor D1 (hDRD1) were successfully constructed from HEK-293 cells, stably expressing hDRD1. The nanovesicles containing hDRD1 as gate-potential modulator on the conducting polymer (CP) nanomaterial transistors provided high-performance responses to DA molecule owing to their uniform, monodispersive morphologies and outstanding discrimination ability. Specifically, the DRNCNs were integrated into a liquid-ion gated field-effect transistor (FET) system via immobilization and attachment processes, leading to high sensitivity and excellent selectivity toward DA in liquid state. Unprecedentedly, the minimum detectable level (MDL) from the field-induced DA responses was as low as 10 pM in real- time, which is 10 times more sensitive than that of previously reported CP based-DA biosensors. Moreover, the FET-type DRNCN biosensor had a rapid response time (<1 s) and showed excellent selectivity in human serum.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biosensing Techniques / instrumentation*
  • Bridged Bicyclo Compounds, Heterocyclic / chemistry*
  • Dopamine / blood*
  • Equipment Design
  • Gene Expression
  • HEK293 Cells
  • Humans
  • Limit of Detection
  • Nanostructures / chemistry*
  • Nanotechnology / instrumentation*
  • Nanotechnology / methods
  • Polymers / chemistry*
  • Receptors, Dopamine D1 / chemistry*
  • Receptors, Dopamine D1 / genetics
  • Time Factors
  • Transistors, Electronic

Substances

  • Bridged Bicyclo Compounds, Heterocyclic
  • DRD1 protein, human
  • Polymers
  • Receptors, Dopamine D1
  • poly(3,4-ethylene dioxythiophene)
  • Dopamine