Alteration and Remediation of Asbestos Fibers: Current state-of-the-art for treatment of asbestos- contaminated sites is to move the asbestos and/or cap the site. The proposed research examines whether chemical alteration of asbestos particles by plants and/or fungi, either directly or indirectly via plant exudates or fungal metabolites, may be useful for bioremediation of asbestos-contaminated sites. The project is motivated by evidence that fungi (Fusarium oxysporum and Verticillium leptobactrum) can remove Fe atoms from asbestos particles, rendering them less toxic. We will target plant species that are known to be metal hyper- accumulators or are native to soils naturally high in heavy metals, such as serpentine soils, and whose roots form mutualist relationships with arbuscular mycorrhizal fungi (AMF). We hypothesize that: it is possible to discover and quantify new ways to remediate asbestos sites in situ using a combination of hyper- accumulating plants and plants native to serpentine soils coupled with their associated arbuscular mycorrhizal fungi (AMF). We propose to test this hypothesis using three specific strategies: 1) Determine new ways to remediate asbestos piles using iron hyper-accumulating plants, plants native to serpentine soils with AMF associations, and the exudates and metabolites fundamentally responsible for the chemical and physical alteration, 2) Validate the effect, rate and chemical mechanisms of asbestos fiber remediation by chemical analysis and spectroscopy techniques and to produce remediated fibers in suspension to apply to cells in Project 4, and to test directly, in animal model systems, whether remediation of asbestos abrogates its carcinogenic potential in vivo in Project 5, and to determine the size reduction and surface charge change of remediated fibers, which applies to Projects 2 and 3). We will etermine whether soil microbial constituents at the Ambler Superfund site and the relative abundance of different AMF species in greenhouse treatments respond to the presence of asbestos, providing clues to effective agents for bioremediation. Highly controlled greenhouse experiments coupled with Scanning Transmission Electron Microscopy, X-ray Diffraction characterization and Inductively Coupled Plasma Optical Emission Spectrometry will document the efficacy of different plant species and combinations of mycorrhizal fungal species in removing Fe from asbestos and destroying the fibrous structure. Where asbestos is altered at the greatest rates, high throughput DNA sequencing and pyrosequencing will be used to quantity the relative abundance of the different AMF species. The same technique will be used to determine how the AMF community at the Ambler superfund site responds to local concentration of asbestos. This information from the site will inform the greenhouse experiments. We believe that the proposed research will produce new remediation strategies for asbestos at Superfund and Brownfields sites, and will eventually lead to marketing such a technique for other sites of asbestos contamination. If clear remediation results in this trial, a larger translation of the results will be pursued through an application for an NIH Small Business Grant. Our results have direct impact on Project 2 and we will communicate how our asbestos remediation affects asbestos fiber size, transport and aggregate formation. We will work closely to confirm reduced toxicity of remediated fibers with the animal model studies in Project 4, and we will be to take advantage of the in vitro asbestos-induced cell injury models developed in Project 5 to compare the activity of untreated and remediated asbestos fibers. We will also interact significantly with the Administration, Biostatistics and Translation Cores.
This project takes a novel approach to the remediation of asbestos-polluted soil by using biological organisms. We evaluate the efficacy of plants and their associated mycorrhizal (root) fungi in harvesting Fe atoms from asbestos particles and changing the structure of the fibers, which renders them less toxic. The project targets plant species that are either metal hyper-accumulators, known to take up metals in large quantities, or are native to soils naturally high in heavy metals and whose roots form mutually beneficial relationships with mycorrhizal fungi.
|Salamatipour, Ashkan; Mohanty, Sanjay K; Pietrofesa, Ralph A et al. (2016) Asbestos Fiber Preparation Methods Affect Fiber Toxicity. Environ Sci Technol Lett 3:270-274|
|Clapp, Justin T; Roberts, Jody A; Dahlberg, Britt et al. (2016) Realities of environmental toxicity and their ramifications for community engagement. Soc Sci Med 170:143-151|
|Pietrofesa, Ralph A; Velalopoulou, Anastasia; Lehman, Stacey L et al. (2016) Novel Double-Hit Model of Radiation and Hyperoxia-Induced Oxidative Cell Damage Relevant to Space Travel. Int J Mol Sci 17:|
|Frey, Alexander J; Wang, Qingqing; Busch, Christine et al. (2016) Validation of highly sensitive simultaneous targeted and untargeted analysis of keto-steroids by Girard P derivatization and stable isotope dilution-liquid chromatography-high resolution mass spectrometry. Steroids 116:60-66|
|Pietrofesa, Ralph A; Velalopoulou, Anastasia; Arguiri, Evguenia et al. (2016) Flaxseed lignans enriched in secoisolariciresinol diglucoside prevent acute asbestos-induced peritoneal inflammation in mice. Carcinogenesis 37:177-87|
|Guo, Lili; Worth, Andrew J; Mesaros, Clementina et al. (2016) Diisopropylethylamine/hexafluoroisopropanol-mediated ion-pairing ultra-high-performance liquid chromatography/mass spectrometry for phosphate and carboxylate metabolite analysis: utility for studying cellular metabolism. Rapid Commun Mass Spectrom 30:1835-45|
|Kadariya, Yuwaraj; Menges, Craig W; Talarchek, Jacqueline et al. (2016) Inflammation-Related IL1Î²/IL1R Signaling Promotes the Development of Asbestos-Induced Malignant Mesothelioma. Cancer Prev Res (Phila) 9:406-14|
|Kadariya, Yuwaraj; Cheung, Mitchell; Xu, Jinfei et al. (2016) Bap1 Is a Bona Fide Tumor Suppressor: Genetic Evidence from Mouse Models Carrying Heterozygous Germline Bap1 Mutations. Cancer Res 76:2836-44|
|Ohar, Jill A; Cheung, Mitchell; Talarchek, Jacqueline et al. (2016) Germline BAP1 Mutational Landscape of Asbestos-Exposed Malignant Mesothelioma Patients with Family History of Cancer. Cancer Res 76:206-15|
|Mesaros, Clementina; Blair, Ian A (2016) Mass spectrometry-based approaches to targeted quantitative proteomics in cardiovascular disease. Clin Proteomics 13:20|
Showing the most recent 10 out of 20 publications