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Defining the developmental and toxicological roles of the AHR-regulated Sox9 lncRNA in zebrafish

Award Number: R01ES030017
ORGANIZATION: NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES
OPDIV: NIH
AWARD CLASS: DISCRETIONARY
AWARD ACTIVITY TYPE: SCIENTIFIC/HEALTH RESEARCH (INCLUDES SURVEYS)

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Defining the developmental and toxicological roles of the AHR-regulated Sox9 lncRNA in zebrafish - PROJECT SUMMARY/ABSTRACT The aryl hydrocarbon receptor (AHR) is required for proper vertebrate development and is activated by a diverse group of chemicals including common pollutants such as chlorinated dioxins, polycyclic aromatic hydrocarbons (PAHs), and coplanar polychlorinated biphenyls. In vertebrates, exposure to chemicals that activate the AHR during early life stages is associated with adverse birth outcomes and impaired neurodevelopment; however, the signaling events downstream of AHR and the genes contributing to toxic responses remain largely unknown. Our long-term goal is to decipher conserved AHR-mediated biological responses via discovery and validation of the causal genes and signaling mechanisms involved in AHR regulated developmental and toxicological processes. We previously identified a novel and phylogenetically conserved long non-coding RNA (slincR) that is induced by multiple environmentally relevant AHR ligands. SlincR is required for the AHR-induced repression of sox9b, a master regulator of cartilage development, and plays a causal role in AHR-mediated hemorrhaging and cartilage defects. The objective of this proposal is to identify the developmental and toxicological roles of the AHR-regulated lncRNA, slincR, in zebrafish. The central hypothesis is that slincR is a critical AHR-downstream signaling factor potentiating adverse developmental responses to diverse xenobiotic chemicals. Our rationale is that understanding how slincR functions and what other factors it interacts with will deepen the understanding of AHR-signaling with the potential to uncover human therapeutic targets for AHR-related disease. We will test our hypothesis by performing loss- and gain-of-function studies to determine the in vivo role of slincR in AHR regulated developmental and toxicological processes (Aim 1). To understand the slincR structure-function relationship with AHR signaling, we will perform structure-mapping experiments and identify the slincR interacting proteins and genome-wide targets (Aim 2). We will use computational approaches to integrate the findings of Aims 1 & 2 into the construction of an AHR gene regulatory network, establishing a systems-level understanding of slincR in AHR-regulated biological processes (Aim 3). This contribution is significant as it will unravel the functional impact of AHR activation on slincR expression and provide a new paradigm for understanding AHR-dependent cellular responses. The proposed research is innovative as we employ cutting-edge technologies new to the field of environmental health sciences. Our proposal will also help to describe a novel adverse outcome pathway (AOP) for dioxin-like AHR ligands that incorporate multiple biological levels including molecular structure, molecular interactions, co- regulated genes, signaling networks, tissue development and whole animal phenotypes. These studies will serve as a template for the systematic functional characterization of lncRNA potentiating biology and disease.


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: 2023 ( Subtotal = -$323,247 )
2023	2021	OREGON STATE UNIVERSITY	1500 SW JEFFERSON AVE	CORVALLIS	OR	97331	BENTON	USA	Environmental Health	000	3	11/24/2022	NON-COMPETING CONTINUATION	-$323,247
														Subtotal = -$323,247

Issue Date FY: 2021 ( Subtotal = $432,680 )
2021	2021	OREGON STATE UNIVERSITY	1500 SW JEFFERSON ST	CORVALLIS	OR	97331	BENTON	USA	Environmental Health	001	3	7/6/2021	NON-COMPETING CONTINUATION	$0
2021	2021	OREGON STATE UNIVERSITY	1500 SW JEFFERSON ST	CORVALLIS	OR	97331	BENTON	USA	Environmental Health	000	3	1/12/2021	NON-COMPETING CONTINUATION	$432,680
														Subtotal = $432,680

Issue Date FY: 2020 ( Subtotal = $397,610 )
2020	2020	OREGON STATE UNIVERSITY	1500 SW JEFFERSON ST	CORVALLIS	OR	97331	BENTON	USA	Environmental Health	000	2	1/24/2020	NON-COMPETING CONTINUATION	$397,610
														Subtotal = $397,610

Issue Date FY: 2019 ( Subtotal = $374,695 )
2019	2019	OREGON STATE UNIVERSITY	1500 SW JEFFERSON ST	CORVALLIS	OR	97331	BENTON	USA	Environmental Health	000	1	1/21/2019	NEW	$374,695
														Subtotal = $374,695

Grand Total All Awards = $881,738

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Defining the developmental and toxicological roles of the AHR-regulated Sox9 lncRNA in zebrafish

Award Number: R01ES030017

ORGANIZATION: NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES

OPDIV: NIH

AWARD CLASS: DISCRETIONARY

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

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