Ascertaining HIV-1 entry in primary cells using advanced imaging approaches

Project Overview

Figure 1. (1) Fusion between the virus particle and target cell (either at the cell membrane or ...

The PhD project aims to establish a radically new approach to interrogate cell signalling cascades in a physiologically realistic context to enable screening of complex signalling networks for applications in virus entry. We will show the power of the approach by developing improved in-vitro disease models during the first stages of HIV-1 entry and fusion.  We will use high content analysis and advanced 3D imaging for assays of multiple cell signalling readouts within 3-D cellular HIV disease models using Primary and iPS derived cells and tissues. Multiplexed fluorescence-based readouts of molecular processes will be carried out using Förster resonant energy transfer (FRET) based biosensors. We will exploit the power of automated imaging technology and develop analysis tools to probe a specific set of signalling pathways acquiring many image-based spatial and temporal readouts from a single coverslip. We will design labelling strategies to optimise multiplexed FRET readouts, exploring the use of spectrally efficient FRET probes including constructs utilising homo- and hetero-FRET with dark acceptors. FRET readouts will be complemented by 2-colour correlation imaging readouts to provide a robust and independent readout of protein interactions. Cell arrays will be prepared in 3-D cultures to provide a more physiologically realistic context than conventional cell-based assays. To evaluate the efficacy of this approach and refine the technology, we will interrogate common pathways associated with HIV-1 entry and infection in primary cells and tissues.

Training Opportunities

The Ph.D offers the possibility of applying cutting-edge approaches from sample preparation (molecular biology tools, CRISPR), cutting-edge light microscopy instruments capable of super-resolution and development of custom-made algorithms for automated image analtysis

Theme

Immunology & Infectious Disease and Physiology, Cellular & Molecular Biology

Admissions

Project reference number: 823

Funding and admissions information

Supervisors

Name Department Institution Country Email
Dr Sergi Padilla-Parra Structural Biology Oxford University, Henry Wellcome Building of Genomic Medicine GBR spadilla@well.ox.ac.uk
Professor Peijun Zhang Structural Biology Oxford University, Henry Wellcome Building of Genomic Medicine GBR peijun@strubi.ox.ac.uk

Padilla-Parra S, Dustin ML. 2016. Actin Dynamics and HIV-1 Entry. Trends Mol Med, Read abstract | Read more

Cortical F-actin plays important roles during HIV-1 infection. A recent paper in Cell highlights the involvement of F-actin in enhancing dendritic cell (DC)-mediated HIV-1 infection of T cells. Such a critical mechanism of HIV-1 trans-enhancement between human DCs and T cells had not been analyzed in molecular detail before this work. Hide abstract