This subproject is one of many research subprojects utilizing theresources provided by a Center grant funded by NIH/NCRR. The subproject andinvestigator (PI) may have received primary funding from another NIH source,and thus could be represented in other CRISP entries. The institution listed isfor the Center, which is not necessarily the institution for the investigator.Arsenic is an established, well-known vascular toxicant that is abundant in ground water and soil around areas with extractive industries. Exposure to arsenic through drinking water increases the frequency of miscarriage, stillbirth and spontaneous abortion in human populations. Our results from experimental mouse studies show that sodium arsenite (AsIII) exposure disrupts placental vasculogenesis, concomitant with placental dysplasia, causing spontaneous abortion between E7.5 and E12.5. Published reports indicate that stromal vascular endothelial growth factor (VEGF) ligand expression is upregulated by AsIII exposure, and our AsIII exposure data in cultured human microvascular endothelial cells (HMVECs) show increased VEGF receptor expression. Therefore, the central hypothesis states that arsenic toxicity causes placental dysplasia and disrupts VEGF-directed vasculogenesis resulting in placental insufficiency and spontaneous abortion.
The specific aims to test this hypothesis are (1) to identify the defect in placental morphogenesis caused by AsIII toxicity and (2) to conduct a functional analysis of the VEGF regulatory pathway to reveal the molecular mechanisms for how AsIII toxicity disrupts placental vasculogenesis. To accomplish these aims, we will utilize a mouse model to fate map stromal and endothelial cells during placentation, to measure key molecules in the VEGF regulatory pathway and to assess placental integrity and function. In addition, adeno-associated virus (AAV) transduction of HMVECs will be used to test the function of ligands, receptors and signaling components of the VEGF placental regulatory pathway. This project will provide a model for studying the morphogenic differences between angiogenesis and vasculogenesis, and most importantly, will offer insight into possible environmental causes of idiopathic human pregnancy complications.

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Exploratory Grants (P20)
Project #
5P20RR017670-07
Application #
7720587
Study Section
Special Emphasis Panel (ZRR1-RI-5 (01))
Project Start
2008-06-01
Project End
2009-05-31
Budget Start
2008-06-01
Budget End
2009-05-31
Support Year
7
Fiscal Year
2008
Total Cost
$155,188
Indirect Cost
Name
University of Montana
Department
Other Health Professions
Type
Schools of Pharmacy
DUNS #
010379790
City
Missoula
State
MT
Country
United States
Zip Code
59812
Peters, Bridget; Ballmann, Christopher; Quindry, Tiffany et al. (2018) Experimental Woodsmoke Exposure During Exercise and Blood Oxidative Stress. J Occup Environ Med 60:1073-1081
Ward, Tony J; Semmens, Erin O; Weiler, Emily et al. (2017) Efficacy of interventions targeting household air pollution from residential wood stoves. J Expo Sci Environ Epidemiol 27:64-71
Biswas, Rupa; Trout, Kevin L; Jessop, Forrest et al. (2017) Imipramine blocks acute silicosis in a mouse model. Part Fibre Toxicol 14:36
Sanchez-Contreras, Monica; Cardozo-Pelaez, Fernando (2017) Age-related length variability of polymorphic CAG repeats. DNA Repair (Amst) 49:26-32
Ferguson, Matthew D; Semmens, Erin O; Weiler, Emily et al. (2017) Lung function measures following simulated wildland firefighter exposures. J Occup Environ Hyg 14:739-748
Park, Sunyoung; Nevin, Andrew B C; Cardozo-Pelaez, Fernando et al. (2016) Pb exposure prolongs the time period for postnatal transient uptake of 5-HT by murine LSO neurons. Neurotoxicology 57:258-269
Jessop, Forrest; Hamilton, Raymond F; Rhoderick, Joseph F et al. (2016) Autophagy deficiency in macrophages enhances NLRP3 inflammasome activity and chronic lung disease following silica exposure. Toxicol Appl Pharmacol 309:101-10
Gábriel, Robert; Erdélyi, Ferenc; Szabó, Gábor et al. (2016) Ectopic transgene expression in the retina of four transgenic mouse lines. Brain Struct Funct 221:3729-41
Wang, Xiaobo; Olson, Jenessa R; Rasoloson, Dominique et al. (2016) Dynein light chain DLC-1 promotes localization and function of the PUF protein FBF-2 in germline progenitor cells. Development 143:4643-4653
Campbell, Matthew A; Van Leuven, James T; Meister, Russell C et al. (2015) Genome expansion via lineage splitting and genome reduction in the cicada endosymbiont Hodgkinia. Proc Natl Acad Sci U S A 112:10192-9

Showing the most recent 10 out of 161 publications