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Multispecies aggregates from human dental plaque nucleate highly diverse spatially structured oral biofilms on saliva coated surfaces

Award Number: F31DE032913
ORGANIZATION: NATIONAL INSTITUTE OF DENTAL AND CRANIOFACIAL RESEARCH
OPDIV: NIH
AWARD CLASS: DISCRETIONARY
AWARD ACTIVITY TYPE: FELLOWSHIP/SCHOLARSHIP/STUDENT LOANS

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Abstract According to the CDC, Periodontitis affects 47.2% of individuals aged 30 and over. By the age of 65, the number of people impacted by periodontitis jumps to 70.1%. Dysbiosis, shifts in biofilm composition leading to imbalances in microbial composition are precursors of widespread human diseases such as tooth decay (dental caries) and periodontitis. How shifts in biofilm spatial structure impact the progression from health to disease is unknown. We have developed an in vitro dental plaque culture system in which plaque samples obtained from healthy donors via flossing are used to seed complex communities. Quantitative analysis by Fluorescence in situ Hybridization (FISH), confocal microscopy, and spectral imaging demonstrated that model biofilms are highly diverse, spatially structured, and unexpectedly heterogeneous in spatial structure. We observed that the dental plaque inocula from healthy donors were composed of single cells and large multispecies coaggregates. We hypothesize that early stochastic events mediated by these multispecies coaggregates lead to highly spatially structured and heterogeneous biofilms depending on where these interacting communities land on nascent surfaces. To test our hypothesis, we developed a protocol for disrupting plaque coaggregates. We observed that biofilms derived from dental plaque inocula in which aggregates were disrupted before seeding in vitro cultures resulted in biofilms with decreased diversity and increased spatial homogeneity. Biofilms derived de-aggregated plaque inocula lacked many gram-negative, obligate anaerobe community members. Our results demonstrate a previously unknown role multispecies aggregates in structuring oral biofilms and may have clinical importance in the mouth.


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 = $37,019 )
2024	2024	RESEARCH FOUNDATION FOR THE STATE UNIVERSITY OF NEW YORK, THE	1400 WASHINGTON AVE	ALBANY	NY	12222	ALBANY	USA	Oral Diseases and Disorders Research	000	2	8/5/2024	NON-COMPETING CONTINUATION	$37,019
														Subtotal = $37,019

Issue Date FY: 2023 ( Subtotal = $35,725 )
2023	2023	RESEARCH FOUNDATION FOR THE STATE UNIVERSITY OF NEW YORK, THE	1400 WASHINGTON AVE	ALBANY	NY	12222	ALBANY	USA	Oral Diseases and Disorders Research	000	1	3/15/2023	NEW	$35,725
2023	2023	RESEARCH FOUNDATION FOR THE STATE UNIVERSITY OF NEW YORK, THE	1400 WASHINGTON AVE	ALBANY	NY	12222	ALBANY	USA	Oral Diseases and Disorders Research	001	1	3/15/2023	NEW	$0
														Subtotal = $35,725

Grand Total All Awards = $72,744

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Multispecies aggregates from human dental plaque nucleate highly diverse spatially structured oral biofilms on saliva coated surfaces

Award Number: F31DE032913

ORGANIZATION: NATIONAL INSTITUTE OF DENTAL AND CRANIOFACIAL RESEARCH

OPDIV: NIH

AWARD CLASS: DISCRETIONARY

AWARD ACTIVITY TYPE: FELLOWSHIP/SCHOLARSHIP/STUDENT LOANS

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