Bacterial biofllms are highly complex structures containing a diversity of microenvironments and physiological states. Due to the complex nature in which bacteria grow within a biofllm, the study of these communities requires sophisficated instrumentation that allows for the simultaneous analysis of individual cells within a population. Fortunately, there has recentiy been an explosion of techniques made available, previously used to study eukaryotic organisms, to help us understand the complexities of biofilm development. The primary function of this Core will be to provide the sophisticated instrumentation needed to visualize the specific transcriptional and physiological changes that occur during biofllm development. It will also give important tools and expertise needed for studying biofllm-related infections. Three speciflc aims are proposed to support this function.
Specific Aim 1 will be to upgrade and maintain the instrumentation needed to provide biofilm images. This will be achieved by providing an upgrade for an exisfing Zeiss LSM510 META confocal microscope available to our group for use in the study of biofllm structure and development, as well as host tissues infected with S. aureus. As this technology will be an integral component of all four Projects, making available expertise in the use of this instrumentation is also a key part of this aim.
Specific Aim 2 will be to provide the technology needed to visualize and isolate specific biofilm substructures and various immune cell populations from biofilms grown in vivo. This newly developed technology for the study of bacterial biofllm will be vital to Projects 1 and 2 for the study of physiological heterogeneity in biofllms. In addition, Project 4 will use this to examine local immunological responses to biofllm-related infections. Finally, Specific Aim 3 will be to provide the technology needed to visualize the progression of infection.
This aim will make available an In Vivo Imaging System (IVIS) for use in following the progression of staphylococcal infection, both from the bacterial and host perspective. This technology will allow Project 3 to test the ability of the bacteria to spread to sights throughout the host, and Project 4 to examine the status of specific immune cells in response to biofllm-related infections. Overall, this Core will give our group a state-of-the-art facility that will greatiy enhance our ability to accomplish the objectives of this PPG.

Public Health Relevance

Agency
National Institute of Health (NIH)
Institute
National Institute of Allergy and Infectious Diseases (NIAID)
Type
Research Program Projects (P01)
Project #
5P01AI083211-05
Application #
8496684
Study Section
Special Emphasis Panel (ZAI1-TS-M)
Project Start
Project End
Budget Start
2013-07-01
Budget End
2014-06-30
Support Year
5
Fiscal Year
2013
Total Cost
$215,102
Indirect Cost
$59,919
Name
University of Nebraska Medical Center
Department
Type
DUNS #
168559177
City
Omaha
State
NE
Country
United States
Zip Code
68198
Ibberson, Carolyn B; Parlet, Corey P; Kwiecinski, Jakub et al. (2016) Hyaluronan Modulation Impacts Staphylococcus aureus Biofilm Infection. Infect Immun 84:1917-29
Marshall, Darrell D; Sadykov, Marat R; Thomas, Vinai C et al. (2016) Redox Imbalance Underlies the Fitness Defect Associated with Inactivation of the Pta-AckA Pathway in Staphylococcus aureus. J Proteome Res 15:1205-12
Kavanaugh, Jeffrey S; Horswill, Alexander R (2016) Impact of Environmental Cues on Staphylococcal Quorum Sensing and Biofilm Development. J Biol Chem 291:12556-64
Gries, Casey M; Sadykov, Marat R; Bulock, Logan L et al. (2016) Potassium Uptake Modulates Staphylococcus aureus Metabolism. mSphere 1:
Windham, Ian H; Chaudhari, Sujata S; Bose, Jeffrey L et al. (2016) SrrAB Modulates Staphylococcus aureus Cell Death through Regulation of cidABC Transcription. J Bacteriol 198:1114-22
Chaudhari, Sujata S; Thomas, Vinai C; Sadykov, Marat R et al. (2016) The LysR-type transcriptional regulator, CidR, regulates stationary phase cell death in Staphylococcus aureus. Mol Microbiol 101:942-53
Vidlak, Debbie; Kielian, Tammy (2016) Infectious Dose Dictates the Host Response during Staphylococcus aureus Orthopedic-Implant Biofilm Infection. Infect Immun 84:1957-65
Paharik, Alexandra E; Horswill, Alexander R (2016) The Staphylococcal Biofilm: Adhesins, Regulation, and Host Response. Microbiol Spectr 4:
Schaeffer, Carolyn R; Hoang, Tra-My N; Sudbeck, Craig M et al. (2016) Versatility of Biofilm Matrix Molecules in Staphylococcus epidermidis Clinical Isolates and Importance of Polysaccharide Intercellular Adhesin Expression during High Shear Stress. mSphere 1:
Lewis, April M; Rice, Kelly C (2016) Quantitative Real-Time PCR (qPCR) Workflow for Analyzing Staphylococcus aureus Gene Expression. Methods Mol Biol 1373:143-54

Showing the most recent 10 out of 89 publications