Digital Commons Network^™

Knowledge, Access And Practice: Understanding The Affordable Care Act From The Voices Of Somali Immigrant Women In The United States, Fareeda Griffith

Faculty Publications

No abstract provided.

Bfd, A New Class Of [2fe-2s] Protein That Functions In Bacterial Iron Homeostasis, Requires A Structural Anion Binding Site, Harshani Wijerathne, Huili Yao, Yan Wang, Scott Lovell, Kevin P. Battaile, Mario Rivera

Faculty Publications

Copyright © 2018 American Chemical Society. Mobilization of iron from bacterioferritin (BfrB) requires specific interactions with a [2Fe-2S] ferredoxin (Bfd). Blocking the BfrB:Bfd interaction results in irreversible iron accumulation in BfrB and iron deficiency in the cytosol [Eshelman, K., et al. (2017) Metallomics 9, 646-659]. The only known Bfd structure, which was obtained in complex with BfrB (Protein Data Bank entry 4E6K), indicated a new fold and suggested that the stability of Bfd is aided by an anion binding site consisting of R26, R29, and K46. We investigated the Bfd fold using site-directed mutagenesis, X-ray crystallography, and biochemistry in solution. …

Serpentinization: Connecting Geochemistry, Ancient Metabolism And Industrial Hydrogenation, Martina Preiner, Joana C. Xavier, Fliipa L. Sousa, Verena Zimorski, Anna Neubeck, Susan Q. Lang, H. Chris Greenwell, Karl Kleinermanns, Harun Tüysüz, Tom M. Mccollom, Nils G. Holm, William F. Martin

Faculty Publications

Rock–water–carbon interactions germane to serpentinization in hydrothermal vents have occurred for over 4 billion years, ever since there was liquid water on Earth. Serpentinization converts iron(II) containing minerals and water to magnetite (Fe₃O₄) plus H₂. The hydrogen can generate native metals such as awaruite (Ni₃Fe), a common serpentinization product. Awaruite catalyzes the synthesis of methane from H₂ and CO₂ under hydrothermal conditions. Native iron and nickel catalyze the synthesis of formate, methanol, acetate, and pyruvate—intermediates of the acetyl-CoA pathway, the most ancient pathway of CO₂ fixation. Carbon monoxide dehydrogenase …

Guidelines And Considerations For Designing Field Experiments Simulating Precipitation Extremes In Forest Ecosystems, Heidi Asbjornsen, John L. Campbell, Katie A. Jennings, Matthew A. Vadeboncoeur, Cameron Mcintire, Pamela H. Templer, Richard P. Phillips, Taryn L. Bauerle, Michael C. Dietze, Serita D. Frey, Peter M. Groffman, Rosella Guerrieri, Paul J. Hanson, Eric P. Kelsey, Alan K. Knapp, Nathan G. Mcdowell, Patrick Meir, Kimberly A. Novick, Scott V. Ollinger, Will T. Pockman, Paul G. Schaberg, Stan D. Wullschleger, Melinda D. Smith, Lindsey E. Rustad

Faculty Publications

Precipitation regimes are changing in response to climate change, yet understanding of how forest ecosystems respond to extreme droughts and pluvials remains incomplete. As future precipitation extremes will likely fall outside the range of historical variability, precipitation manipulation experiments (PMEs) are critical to advancing knowledge about potential ecosystem responses. However, few PMEs have been conducted in forests compared to short-statured ecosystems, and forest PMEs have unique design requirements and constraints. Moreover, past forest PMEs have lacked coordination, limiting cross-site comparisons. Here, we review and synthesize approaches, challenges, and opportunities for conducting PMEs in forests, with the goal of guiding design …

Comparison Of Thermally Actuated Retro-Diels-Alder Release Groups For Nanoparticle Based Nucleic Acid Delivery, Mohammad Abu-Laban, Raju R. Kumal, Jonathan Casey, Jeff Becca, Daniel Lamaster, Carlos N. Pacheco, Dan G. Sykes, Lasse Jensen, Louis H. Haber, Daniel J. Hayes

Faculty Publications

© 2018 Elsevier Inc. The present study explores alternate pericyclic chemistries for tethering amine-terminal biomolecules onto silver nanoparticles. Employing the versatile tool of the retro-Diels-Alder (rDA) reaction, three thermally-labile cycloadducts are constructed that cleave at variable temperature ranges. While the reaction between furan and maleimide has widely been reported, the current study also evaluates the reverse reaction kinetics between thiophene-maleimide, and pyrrole-maleimide cycloadducts. Density Functional Theorem (DFT) calculations used to model and plan the experiments, predict energy barriers for the thiophene-maleimide reverse reaction to be greatest, and the pyrrole-maleimide barriers the lowest. Based on the computational analyses, it is projected …

Genomic Sequence Of A Novel Endornavirus From Phaseolus Vulgaris And Occurrence In Mixed Infections With Two Other Endornaviruses, Ryo Okada, Ricardo Iván Alcalá-Briseño, Cesar Escalante, Sead Sabanadzovic, Rodrigo A. Valverde

Faculty Publications

The Endornaviridae family includes viruses with ssRNA genome that infect plants, fungi, and oomycetes. Plant endornaviruses do not cause visible symptoms and are transmitted only vertically. Many common bean (Phaseolus vulgaris) genotypes have been reported to be infected by Phaseolus vulgaris endornavirus 1 and Phaseolus vulgaris endornavirus 2. Using next-generation sequencing, we obtained the RNA sequence of a third common bean endornavirus, which we named Phaseolus vulgaris endornavirus 3 (PvEV3). The complete sequence consisted of 15,205nt in length with a single open reading frame (ORF) coding for a polyprotein of 4932 aa, and untranslated regions of 344önt and 62önt at …

More Than A Pretty Interface: The Louisiana Digital Library As A Data Hub, Scott Ziegler, Cara M. Key

Faculty Publications

The Louisiana Digital Library (LDL) is an online platform for libraries, museums, archives, and historical organizations across the state. The books, manuscripts, oral histories, maps, and photographs held in the LDL showcase the cultural resources of Louisiana.

The metadata about these items is also a great asset. When explored in their entirety, the data held in the LDL is as valuable as the digital facsimiles. This talk will explore the LDL as a data hub, a place to gather and share the metadata of the participating institutions. Open data is a growing trend in archives and special collections, enabling new …

Cover Crops May Cause Winter Warming In Snow-Covered Regions, Danica L. Lombardozzi, Gordon B. Bonan

Faculty Publications

Cover crops, grown between cash crops when soil is fallow, are a management strategy that may help mitigate climate change. The biogeochemical effects of cover crops are well documented, as they provide numerous localized benefits to farmers. We test potential biogeophysical climate impacts of idealized cover crop scenarios by assuming that cover crops are planted offseason in all crop regions throughout North America. Our results suggest that planting cover crops increases wintertime temperature up to 3 °C in central North America by decreasing albedo in regions with variable snowpack. Cover crops with higher leaf area indices increase temperature more by …

Effects Of Protein Supplementation On Performance And Recovery In Resistance And Endurance Training, Harry P. Cintineo, Michelle A. Arent, Jose Antonio, Shawn M. Arent Ph.D., Cscs*D, Fissn, Facsm, Fnak

Faculty Publications

There is robust evidence which shows that consuming protein pre- and/or post-workout induces a significant rise in muscle protein synthesis. It should be noted, however, that total daily caloric and protein intake over the long term play the most crucial dietary roles in facilitating adaptations to exercise. However, once these factors are accounted for, it appears that peri-exercise protein intake, particularly in the post-training period, plays a potentially useful role in terms of optimizing physical performance and positively influencing the subsequent recovery processes for both resistance training and endurance exercise. Factors that affect the utility of pre- or post-workout feeding …

Edwardsiella Ictaluri Type Iii Secretion System (T3ss) Effector Esen Is A Phosphothreonine Lyase That Inactivates Erk1/2, Lidiya P. Dubytska, Ronald L. Thune

Faculty Publications

© The authors 2018. EseN is a type III secretion system (T3SS) effector that is encoded on the Edwardsiella ictaluri chromosome and is homologous to a family of T3SS effector proteins with phosphothreonine lyase (PTL) activity, including OspF from Shigella and SpvC from Salmonella. A yeast-2-hybrid system was used to identify the major vault protein (MVP) as a specific host-cell binding partner for EseN, and the proximity ligation assay (PLA) confirmed the interaction. Similar to other pathogens, E. ictaluri invasion activates extracellular signal-regulated kinases 1 and 2 (ERK1/2) early in the infection, which are subsequently inactivated by EseN. Structurally, EseN …

Ubiquitin Receptor Rpn13 Mediates The Inhibitory Interaction Of Diphenyldihaloketones Clefma And Ef24 With The 26s Proteasome, Geeta Rao, Gregory Nkepang, Jian Xu, Hooman Yari, Hailey Houson, Chengwen Teng Pharm.D., Ph.D., Vibhudutta Awasthi

Faculty Publications

The proteasome is a validated target in drug discovery for diseases associated with unusual proteasomal activity. Here we report that two diphenyldihaloketones, CLEFMA and EF24, inhibit the peptidase activity of the 26S proteasome. The objective of this study was to investigate interaction of these compounds with the proteasome and identify a putative target within the protein components of the 26S proteasome. We employed standard fluorogenic peptide-based proteasome activity assay for trypsin-like, chymotrypsin-like, and caspase-like activities of human purified 26S proteasome in cell-free conditions. GFPu-1 and HUVEC cells were used as proteasome reporter cells. Direct binding studies used purified 19S, 20S, …

Membrane Expression Of Thymidine Kinase 1 And Potential Clinical Relevance In Lung, Breast, And Colorectal Malignancies, Evita G. Weagel, Weston Burrup, Roman Kovtun, Edwin J. Valazquez, Abigail M. Felsted, Michelle H. Townsend, Zachary E. Ence, Erica Suh, Stephen Piccolo, K. Scott Weber, Richard A. Robison, Kim Oneill

Faculty Publications

Background: Lung, breast, and colorectal malignancies are the leading cause of cancer-related deaths in the world causing over 2.8 million cancer-related deaths yearly. Despite efforts to improve prevention methods, early detection, and treatments, survival rates for advanced stage lung, breast, and colon cancer remain low, indicating a critical need to identify cancer-specific biomarkers for early detection and treatment. Thymidine kinase 1 (TK1) is a nucleotide salvage pathway enzyme involved in cellular proliferation and considered an important tumor proliferation biomarker in the serum. In this study, we further characterized TK1’s potential as a tumor biomarker and immunotherapeutic target and clinical relevance. …

Toxoplasma Gondii Seropositivity And Substance Use In Us Adults, Bruce L. Brown, Andrew N. Berrett, Shawn D. Gale, Lance D. Erickson, Evan L. Thacker, Dawson W. Hedges

Faculty Publications

The intracellular parasite Toxoplasma gondii (Nicolle et Manceaux, 1908) infects humans resulting in acute toxoplasmosis, an infection that in immunocompetent people is typically mild but results in persistent latent toxoplasmosis. In that T. gondii appears to affect dopamine synthesis and because addicting drugs affect midbrain dopamine transmission, latent toxoplasmosis could influence substance use. Using both the third and continuous National Health and Nutrition Examination Surveys from the US Centers for Disease Control and Prevention, we used logistic regression to test for associations between T. gondii seropositivity and subject self-report of having ever used tobacco, alcohol, marijuana, cocaine, heroin, or methamphetamine. …

Managing The Risks And Rewards Of Death In Eusocial Insects, Qian Sun, Kenneth F. Haynes, Xuguo Zhou

Faculty Publications

Eusocial insects frequently face death of colony members as a consequence of living in large groups where the success of the colony is not dependent on the fate of the individual. Whereas death of conspecifics commonly triggers aversion in many group-living species due to risk of pathogens, eusocial insects perform cooperative corpse management. The causes and social context of the death, as well as feeding and nesting ecology of the species, influence the way that corpses are treated. The corpse itself releases cues that dictate the colony's response. As a result, social insects exhibit behavioural responses that promote disease resistance, …

Selective Habitat Use By Moose During Critical Periods In The Winter Tick Life Cycle, Christine Healy, Peter J. Pekins, Lee Kantar, Russell G. Congalton, Shadi Atallah

Faculty Publications

High calf mortality attributed to winter tick (Dermacentor albipictus) parasitism occurs in moose (Alces alces) populations along their southern range in the northeastern United States. We analyzed habitat use of cow and calf moose during the critical drop-off and questing periods in the winter tick life cycle to determine a potential relationship between tick density and habitat. We measured habitat use using geospatial analyses of locational data from > 200 radio-marked animals at 3 sites in New Hampshire and Maine. Moose selected for optimal habitat, defined as 4–16 year-old forest openings, regardless of season or site; this was the only land …

Little Lasting Impact Of The Paleocene-Eocene Thermal Maximum On Shallow Marine Molluscan Faunas, Linda Ivany, Carlie Pietsch, John Handley, Rowan Lockwood, Warren Allmon, Jocelyn Sessa

Faculty Publications

Global warming, acidification, and oxygen stress at the Paleocene-Eocene Thermal Maximum (PETM) are associated with severe extinction in the deep sea and major biogeographic and ecologic changes in planktonic and terrestrial ecosystems, yet impacts on shallow marine macrofaunas are obscured by the incompleteness of shelf sections. We analyze mollusk assemblages bracketing (but not including) the PETM and find few notable lasting impacts on diversity, turnover, functional ecology, body size, or life history of important clades. Infaunal and chemosymbiotic taxa become more common, and body size and abundance drop in one clade, consistent with hypoxia-driven selection, but within-clade changes are not …

Spatial Distribution And Contamination Assessment Of Surface Heavy Metals Off The Western Guangdong Province And Northeastern Hainan Island, Qian Ge, Zuo George Xue, Fengyou Chu

Faculty Publications

Surface sediments collected from the continental shelf off the western Guangdong Province and northeastern Hainan Island are analyzed for selected heavy metals contents including Cd, Cr, Cu, Pb, Zn, and As to determine spatial distribution, potential ecological risks, and sources. In addition, some of the controlling factors of heavy metals distribution are also discussed. The average heavy metals contents decrease in the order of Zn > Cr > Pb > Cu > As > Cd. The averaged pollution degree, as shown by the index of geo-accumulation (Igeo), decreases in the order of Zn > Cu > Pb > Cr > Cd > As. Due to the barrier of islands, the …

Transgene-Assisted Genetic Screen Identifies Rsd-6 And Novel Genes As Key Components Of Antiviral Rna Interference In Caenorhabditis Elegans, Tianyun Long, Fei Meng, Rui Lu

Faculty Publications

© 2018 American Society for Microbiology. RNA interference (RNAi) is a widespread antiviral mechanism triggered by virus-produced double-stranded RNAs (dsRNAs). In Caenorhabditis elegans, antiviral RNAi involves a RIG-I-like RNA helicase, termed DRH-1 (dicer related RNA helicase 1), that is not required for classical RNAi triggered by artificial dsRNA. Currently, whether antiviral RNAi in C. elegans involves novel factors that are dispensable for classical RNAi remains an open question. To address this question, we designed and carried out a genetic screen that aims to identify novel genes involved in worm antiviral RNAi. By introducing extra copies of known antiviral RNAi genes …

Gene Regulation By Redox-Sensitive Burkholderia Thailandensis Ohrr And Its Role In Bacterial Killing Of Caenorhabditis Elegans, Anuja Pande, Todd C. Veale, Anne Grove

Faculty Publications

© 2018 American Society for Microbiology. Fatty acid hydroperoxides are involved in host-pathogen interactions. In both plants and mammals, polyunsaturated fatty acids are liberated during infection and enzymatically oxidized to the corresponding toxic hydroperoxides during the defensive oxidative burst that is designed to thwart the infection. The bacterial transcription factor OhrR (organic hydroperoxide reductase regulator) is oxidized by organic hydroperoxides, as a result of which the ohr gene encoding organic hydroperoxide reductase is induced. This enzyme converts the hydroperoxides to less toxic alcohols. We show here that OhrR from Burkholderia thailandensis represses expression of ohr. Gene expression is induced by …

Circular Rna Identified From Peg3 And Igf2r, Bambarendage P.U. Perera, Subash Ghimire, Joomyeong Kim

Faculty Publications

Copyright: © 2018 Perera et al. Circular RNA is a newly discovered class of non-coding RNA generated through the back-splicing of linear pre-mRNA. In the current study, we characterized two circular RNAs that had been identified through NGS-based 5'RACE experiments. According to the results, the Peg3 locus contains a 214-nucleotide-long circular RNA, circPeg3, that is detected in low abundance from the neonatal brain, lung and ovary. In contrast, the Igf2r locus contains a group of highly abundant circular RNAs, circIgf2r, showing multiple forms with various exon combinations. In both cases, the expression patterns of circPeg3 and circIgf2r among individual tissues …

4c-Seq Characterization Of Drosophila Beaf Binding Regions Provides Evidence For Highly Variable Long-Distance Interactions Between Active Chromatin, Shraddha Shrestha, Dong Ha Oh, J. Keller Mckowen, Maheshi Dassanayake, Craig M. Hart

Faculty Publications

© 2018 Shrestha et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Chromatin organization is crucial for nuclear functions such as gene regulation, DNA replication and DNA repair. Insulator binding proteins, such as the Drosophila Boundary Element-Associated Factor (BEAF), are involved in chromatin organization. To further understand the role of BEAF, we detected cis-and trans-interaction partners of four BEAF binding regions (viewpoints) using 4C (circular chromosome conformation capture) and analyzed their association with …

Relief Of The Dma1-Mediated Checkpoint Requires Dma1 Autoubiquitination And Dynamic Localization, Christine M. Jones, Jun Song Chen, Alyssa E. Johnson, Zachary C. Elmore, Sierra N. Cullati, Janel R. Beckley, Kathleen L. Gould

Faculty Publications

© 2018 Jones, Chen, et al. Chromosome segregation and cell division are coupled to prevent aneuploidy and cell death. In the fission yeast Schizosaccharomyces pombe, the septation initiation network (SIN) promotes cytokinesis, but upon mitotic checkpoint activation, the SIN is actively inhibited to prevent cytokinesis from occurring before chromosomes have safely segregated. SIN inhibition during the mitotic checkpoint is mediated by the E3 ubiquitin ligase Dma1. Dma1 binds to the CK1-phosphorylated SIN scaffold protein Sid4 at the spindle pole body (SPB), and ubiquitinates it. Sid4 ubiquitination antagonizes the SPB localization of the Polo-like kinase Plo1, the major SIN activator, so …

Adipose Tissue Dysfunction Occurs Independently Of Obesity In Adipocyte-Specific Oncostatin Receptor Knockout Mice, Jacqueline M. Stephens, Jennifer L. Bailey, Hardy Hang, Victoria Rittell, Marilyn A. Dietrich, Randall L. Mynatt, Carrie M. Elks

Faculty Publications

© 2018 The Obesity Society Objective: This study examined the phenotypic effects of adipocyte-specific oncostatin M receptor (OSMR) loss in chow-fed mice. Methods: Chow-fed adipocyte-specific OSMR knockout (FKO) mice and littermate OSMRfl/fl controls were studied. Tissue weights, insulin sensitivity, adipokine production, and stromal cell immunophenotypes were assessed in epididymal fat (eWAT); serum adipokine production was also assessed. In vitro, adipocytes were treated with oncostatin M, and adipokine gene expression was assessed. Results: Body weights, fasting blood glucose levels, and eWAT weights did not differ between genotypes. However, the eWAT of OSMRFKO mice was modestly less responsive to insulin stimulation than …

Proximity Ligation Assay To Study Protein-Protein Interactions Of Proteins On Two Different Cells, Rushikesh Sable, Nithya Jambunathan, Sitanshu Singh, Sandeep Pallerla, Konstantin G. Kousoulas, Seetharama Jois

Faculty Publications

© 2018 Future Science. All rights reserved. Protein-protein interactions (PPI) by homo-, hetero- or oligo-merization in the cellular environment regulate cellular processes. PPI can be inhibited by antibodies, small molecules or peptides, and this inhibition has therapeutic value. A recently developed method, the proximity ligation assay (PLA), provides detection of PPI in the cellular environment. However, most applications using this assay are for proteins expressed in the same cell. We employ PLA for the first time to study PPI of cell surface proteins on two different cells. Inhibition of PPI using a peptide inhibitor is also quantified using this assay; …

Variation Across Mitochondrial Gene Trees Provides Evidence For Systematic Error: How Much Gene Tree Variation Is Biological?, E J. Richards, J M. Brown, A J. Barley, R A. Chong, E J. Richards

Faculty Publications

The use of large genomic data sets in phylogenetics has highlighted extensive topological variation across genes. Much of this discordance is assumed to result from biological processes. However, variation among gene trees can also be a consequence of systematic error driven by poor model fit, and the relative importance of biological vs. methodological factors in explaining gene tree variation is a major unresolved question. Using mitochondrial genomes to control for biological causes of gene tree variation, we estimate the extent of gene tree discordance driven by systematic error and employ posterior prediction to highlight the role of model fit in …

Variation Across Mitochondrial Gene Trees Provides Evidence For Systematic Error: How Much Gene Tree Variation Is Biological?, E J. Richards, J M. Brown, A J. Barley, R A. Chong, E J. Richards

Faculty Publications

The use of large genomic data sets in phylogenetics has highlighted extensive topological variation across genes. Much of this discordance is assumed to result from biological processes. However, variation among gene trees can also be a consequence of systematic error driven by poor model fit, and the relative importance of biological vs. methodological factors in explaining gene tree variation is a major unresolved question. Using mitochondrial genomes to control for biological causes of gene tree variation, we estimate the extent of gene tree discordance driven by systematic error and employ posterior prediction to highlight the role of model fit in …

Sustaining Stem Initiatives: The Challenge Of A Worthy Investment, Melissa B. Crawford, Tyrslai M. Williams, Zakiya Wilson-Kennedy, Linda Hooper-Bui, Megan Stone, Isiah M. Warner

Faculty Publications

No abstract provided.

An Overview Of Extant Conifer Evolution From The Perspective Of The Fossil Record, Andrew B. Leslie, Jeremy Beaulieu, Garth Holman, Christopher S. Campbell, Wenbin Mei, Linda R. Raubeson, Sarah Mathews

Faculty Publications

© 2018 Botanical Society of America Premise of the Study: Conifers are an important living seed plant lineage with an extensive fossil record spanning more than 300 million years. The group therefore provides an excellent opportunity to explore congruence and conflict between dated molecular phylogenies and the fossil record. Methods: We surveyed the current state of knowledge in conifer phylogenetics to present a new time-calibrated molecular tree that samples ~90% of extant species diversity. We compared phylogenetic relationships and estimated divergence ages in this new phylogeny with the paleobotanical record, focusing on clades that are species-rich and well known from …

New Mouse Model Of Pulmonary Hypertension Induced By Respiratory Syncytial Virus Bronchiolitis, Dai Kimura, Jordy Saravia, Sridhar Jaligama, Isabella Mcnamara, Luan D. Vu, Ryan D. Sullivan, Salvatore Mancarella, Dahui You, Stephania A. Cormier

Faculty Publications

© 2018 American Physiological Society. All rights reserved. Pulmonary hypertension (PH) has been observed in up to 75% of infants with moderate to severe respiratory syncytial virus (RSV) bronchiolitis and is associated with significant morbidity and mortality in infants with congenital heart disease. The purpose of the present study was to establish a mouse model of PH secondary to RSV bronchiolitis that mimics the disease etiology as it occurs in infants. Neonatal mice were infected with RSV at 5 days of age and then reinfected 4 wk later. Serum-free medium was administered to age-matched mice as a control. Echocardiography and …

Dispersal Records Of The Sugarcane Aphid, Melanaphis Sacchari (Zehntner) (Hemiptera: Aphididae), Through The Midwest Suction Trap Network, Doris Lagos-Kutz, David Voegtlin, Jeffrey Davis, Glen Hartman

Faculty Publications

Summary Melanaphis sacchari (Zehntner) (Hemiptera: Aphididae), the sugarcane aphid, is an invasive species in the United States. This species is a threat to crops of economic importance including sorghum and sugar cane. Therefore, monitoring dispersal of this pest is necessary to document its geographic expansion. Based on trap catches obtained from the Midwest Suction Trap Network during 2015 to 2017, sugarcane aphids arrived late in the growing season as far as northern Wisconsin. We will continue to monitor the dispersal of this aphid species through the Midwest Suction Trap Network in order to provide information to researchers, extension agents, and …