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Identification and development of antimicrobial peptoids effective against cross-kingdom biofilms

Award Number: R03AI146393
ORGANIZATION: NATIONAL INSTITUTE OF ALLERGY & INFECTIOUS DISEASES
OPDIV: NIH
AWARD CLASS: DISCRETIONARY
AWARD ACTIVITY TYPE: SCIENTIFIC/HEALTH RESEARCH (INCLUDES SURVEYS)

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Identification and development of antimicrobial peptoids effective against cross-kingdom biofilms - Identification and development of antimicrobial peptoids effective against cross-kingdom biofilms Project Summary The purposed work focuses on identifying antimicrobial compounds targeting cross-kingdom biofilms generated by Candida albicans and bacteria through high-throughput screening of a one bead one compound combinatorial library. C. albicans is the third most common source of hospital acquired infections and the primary source of hospital acquired fungal infections, with high rates of morbidity and mortality. C. albicans often forms cross-kingdom polymicrobial biofilms with other infectious microbes. These cross-kingdom interactions can be synergistic and result in unique quorum-sensing that causes increased drug resistance. Antimicrobial drugs that treat both the fungal and the bacterial infections within a complex, synergistic biofilm would provide a valuable therapeutic option to those dealing with deadly hospital acquired cross-kingdom biofilm infections. Once such option could be antimicrobial peptoids. Peptoids are a useful class of peptidomimetics due to ease of synthesis, increased bioavailability, and decreased protease recognition compared with peptides. Our lab and others have demonstrated the antimicrobial efficacy of peptoids against both bacterial and fungal pathogens. Additionally, reports demonstrate modest efficacy of antimicrobial peptoids against both monospecial and cross-kingdom biofilms. However, the low throughput nature of these antimicrobial peptoid reports limits the compound chemical diversity and biofilm species variety they can explore. The overall goal of this proposal is to identify antimicrobial peptoids effective against C. albicans/bacterial cross-kingdom biofilms through the adaption and use of our previously developed PLAD high-throughput assay. Specific work proposed here will include the synthesis of several combinatorial peptoid libraries and screening of these libraries using our high-throughput Peptoid Library Agar Diffusion (PLAD) assay with subsequent testing to evaluate antibiofilm activity. Additionally, we will also adapt our PLAD assay to screen peptoid libraries against mature, established biofilms to directly generate peptoids with antibiofilm activity. Antibiofilm compounds rapidly identified using these techniques will be resynthesized and their broad antibiofilm activity and preliminary cytotoxicity evaluated using traditional methods to generate lead compounds. Successful completion of this work will result in antibiofilm peptoids that can be further developed into therapeutic options for individuals dealing with deadly cross-kingdom biofilm infections on wounds, prosthetics, and other surfaces.


Issue Date FY	Funding FY	Legal Entity Name	Legal Entity Address	Legal Entity City	Legal Entity State	Legal Entity Zip Code	Legal Entity COUNTY	Legal Entity COUNTRY	Assistance Listing	Award Code	Budget Year	Action Date	Action Type	Action Amount

Issue Date FY: 2024 ( Subtotal = -$11 )
2024	2021	MIDDLE TENNESSEE STATE UNIVERSITY	1301 E MAIN ST	MURFREESBORO	TN	37132	RUTHERFORD	USA	Allergy and Infectious Diseases Research	000	2	1/8/2024	NON-COMPETING CONTINUATION	-$11
														Subtotal = -$11

Issue Date FY: 2021 ( Subtotal = $65,400 )
2021	2021	MIDDLE TENNESSEE STATE UNIVERSITY	1301 E MAIN ST	MURFREESBORO	TN	37132	RUTHERFORD	USA	Allergy and Infectious Diseases Research	000	2	1/15/2021	NON-COMPETING CONTINUATION	$65,400
														Subtotal = $65,400

Issue Date FY: 2020 ( Subtotal = $65,400 )
2020	2020	MIDDLE TENNESSEE STATE UNIVERSITY	1301 E MAIN ST	MURFREESBORO	TN	37132	RUTHERFORD	USA	Allergy and Infectious Diseases Research	000	1	2/18/2020	NEW	$65,400
														Subtotal = $65,400

Grand Total All Awards = $130,789

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Identification and development of antimicrobial peptoids effective against cross-kingdom biofilms

Award Number: R03AI146393

ORGANIZATION: NATIONAL INSTITUTE OF ALLERGY & INFECTIOUS DISEASES

OPDIV: NIH

AWARD CLASS: DISCRETIONARY

AWARD ACTIVITY TYPE: SCIENTIFIC/HEALTH RESEARCH (INCLUDES SURVEYS)

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