Presentation Title

Investigation of Marine Bacterial Compounds That Inhibit Biofilm Production in Mycobacteria

Faculty Mentor

Jacqueline A. Trischman

Start Date

17-11-2018 10:15 AM

End Date

17-11-2018 10:30 AM

Location

C335

Session

Oral 2

Type of Presentation

Oral Talk

Subject Area

physical_mathematical_sciences

Abstract

Tuberculosis (TB) kills more than one million people annually. Bacteria of the Mycobacterium genus, including M. tuberculosis, build a complex cell wall containing mycolic acids. This cell wall is difficult to penetrate, so specialized antibiotics are needed. Even with newly developed drugs, bacteria adapt quickly and exhibit resistance at an alarmingly rapid pace.One adaptation that allows the community to survive is production of biofilms. Formation of biofilm is one of many quorum sensing behaviors known in pathogenic mycobacteria. This additional layer surrounds a microenvironment where bacteria can thrive with a very low concentration of antibiotic. Thus, one alternative method to treat TB is to control biofilm formation.

In this research, a set of marine bacterial strains, including several bacteria that exhibited swarming behaviors and several from the same environmental samples that did not, were cultured, extracted, and analyzed by 1H NMR and LC-MS as well as in newly-developed biofilm and growth inhibition assays. Initial results showed one group of bacteria produced an organic compound that induced biofilm production in mycobacteria. This was an unexpected result. One representative strain producing a strong biofilm inducer was grown on large scale (10L) then extracted using progressively less polar eluents on a reversed-phase SPE column. The biofilm-inducing fraction was then separated using HPLC. One major component was analyzed spectroscopically using 1D and 2D NMR techniques along with Mass Spectrometry. This compound could result in a strategy to interfere with biofilm formation in mycobacteria, thus making antibiotics more effective.

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Nov 17th, 10:15 AM Nov 17th, 10:30 AM

Investigation of Marine Bacterial Compounds That Inhibit Biofilm Production in Mycobacteria

C335

Tuberculosis (TB) kills more than one million people annually. Bacteria of the Mycobacterium genus, including M. tuberculosis, build a complex cell wall containing mycolic acids. This cell wall is difficult to penetrate, so specialized antibiotics are needed. Even with newly developed drugs, bacteria adapt quickly and exhibit resistance at an alarmingly rapid pace.One adaptation that allows the community to survive is production of biofilms. Formation of biofilm is one of many quorum sensing behaviors known in pathogenic mycobacteria. This additional layer surrounds a microenvironment where bacteria can thrive with a very low concentration of antibiotic. Thus, one alternative method to treat TB is to control biofilm formation.

In this research, a set of marine bacterial strains, including several bacteria that exhibited swarming behaviors and several from the same environmental samples that did not, were cultured, extracted, and analyzed by 1H NMR and LC-MS as well as in newly-developed biofilm and growth inhibition assays. Initial results showed one group of bacteria produced an organic compound that induced biofilm production in mycobacteria. This was an unexpected result. One representative strain producing a strong biofilm inducer was grown on large scale (10L) then extracted using progressively less polar eluents on a reversed-phase SPE column. The biofilm-inducing fraction was then separated using HPLC. One major component was analyzed spectroscopically using 1D and 2D NMR techniques along with Mass Spectrometry. This compound could result in a strategy to interfere with biofilm formation in mycobacteria, thus making antibiotics more effective.