William Bentley

Professor

Bentley Group

Contact

Email: bentley@umd.edu

Call: (301) 405-4321

Education

  • Ph.D., Chemical Engineering, University of Colorado, 1989
  • M.Eng., Chemical Engineering, Cornell University, 1983
  • B.S., Chemical Engineering, Cornell University, 1982

Profile

Dr. William E. Bentley develops and uses molecular tools to engineer cells for enhanced function (synthetic biology) and to open “communication” pathways for innovative device design and fabrication (bioelectronics). His laboratory has engineered cells and small consortia of cells to execute advanced functions such as detecting and killing pathogens. His lab has also adapted natural bacterial signaling pathways to build components and systems that enable bidirectional communication between devices and biological systems.

CURRENT RESEARCH

Metabolic and Biomolecular Engineering – Quorum Sensing and Cell Networks

The Bentley Lab creates and uses molecular tools to understand the regulation of genetic circuits during applied stresses, and to gain near real-time information on the dynamics of metabolites, genes, proteins, and protein assemblies in targeted circuits. They use systems biology and synthetic biology approaches to alter the intracellular environment to improve cellular processes.

Many projects in the lab involve “quorum sensing” (QS), a signal transduction pathway of cell-to-cell communication about population levels that regulates cell behavior and enables individual bacteria to act with multicellularity. The Bentley Lab was the first group to use QS signaling to develop a means to control bacterial subpopulations and sort quantized quorums (Servinsky et al. 2015, ISME Journal). More recently, they exploited these signaling pathways that control individual and groups of cells to engineer bacteria to seek out and kill pathogens in the GI tract of mice (Hwang et al. 2017, Nature Comm). Here, the cells themselves are functioning products of synthetic biology, as they recognize, compute, actuate, and deliver -- all in a programmed manner.

Biofabrication Engineering of Biological Signaling - bBIOS

The Bentley Lab is engaged in a multidisciplinary effort to create systems that serve to bridge the communication gap between biological systems and electronic microfabricated devices. Biology “communicates” via small molecule signaling (e.g. QS above) and ion flow, but devices are programmed with electrons, leading to a problem of translation. Dr. Bentley’s group employs the biopolymer chitosan as a “smart” stimuli-responsive interface. 

For example, the group developed a means to electronically assemble and control the activity of a two-enzyme biosynthetic pathway that leads to a bacterial QS signal molecule (Gordonov et al. 2014, Nature Nanotech). This showed for the first time that one can electrically connect to and control biological behavior.  A signal molecule generated and controlled on-chip affected behavioral phenotype at the population level,

More recently, they demonstrated for the first time direct electrical actuation of gene expression in bacteria. They exploited redox signaling to actuate in a reversible manner expression of several genes in E. coli, including those that synthesize a native QS signal molecule. This molecule, in turn, actuated gene expression in neighboring cells. Hence, electrically programmed cells were made to stimulate signaling via native biological means. (Tshirhart et al. 2017, Nature Comm).  For more information, visit the Maryland Biochip Collaborative website.

The Bentley group anticipates developing new tools for deciphering the presence of pathogens and for understanding and treatment of metabolic diseases, cancer, and hemorrhagic shock.

Publications
2022
Quorum sensing componentry opens new lines of communication.
Bacterial chemotaxis in static gradients quantified in a biopolymer membrane-integrated microfluidic platform.
Network-based redox communication between abiotic interactive materials.
Electrogenetic Signal Transmission and Propagation in Coculture to Guide Production of a Small Molecule, Tyrosine.
2021
Parsed synthesis of pyocyanin via co-culture enables context-dependent intercellular redox communication.
3D-Printed electrochemical sensor-integrated transwell systems.
Editorial overview: Bioanalytical tools, techniques, and trailblazers offer insight to drive bioprocess development.
Electrochemical measurement of serotonin by Au-CNT electrodes fabricated on microporous cell culture membranes.
Association of acute psychosocial stress with oxidative stress: Evidence from serum analysis.
Mediated electrochemistry for redox-based biological targeting: entangling sensing and actuation for maximizing information transfer.
A Redox-Based Autoinduction Strategy to Facilitate Expression of 5xCys-Tagged Proteins for Electrobiofabrication.
Electronic signals are electrogenetically relayed to control cell growth and co-culture composition.
Mediated Electrochemical Probing: A Systems-Level Tool for Redox Biology.
Single-Step Synthesis of Alginate Microgels Enveloped with a Covalent Polymeric Shell: A Simple Way to Protect Encapsulated Cells.
Bacterial Extracellular Vesicles and the Gut-Microbiota Brain Axis: Emerging Roles in Communication and Potential as Therapeutics.
Simple, rapidly electroassembled thiolated PEG-based sensor interfaces enable rapid interrogation of antibody titer and glycosylation.
Interactive Materials for Bidirectional Redox-Based Communication.
Bioelectronic control of a microbial community using surface-assembled electrogenetic cells to route signals.
2020
Redox Electrochemistry to Interrogate and Control Biomolecular Communication.
Homologous Quorum Sensing Regulatory Circuit: A Dual-Input Genetic Controller for Modulating Quorum Sensing-Mediated Protein Expression in E. coli.