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Single-Component Hydrophilic Terpolymer Thin Film Systems For Imparting Surface Chemical Versatility On Various Substrates, Yun Hee Ko, Hai Ha Tran Nguyen, Christopher R. Branstetter, Soeun Park, Jin Kyun Lee, Jaesung Yang, Jangwook P. Jung, Myungwoong Kim Jan 2024

Single-Component Hydrophilic Terpolymer Thin Film Systems For Imparting Surface Chemical Versatility On Various Substrates, Yun Hee Ko, Hai Ha Tran Nguyen, Christopher R. Branstetter, Soeun Park, Jin Kyun Lee, Jaesung Yang, Jangwook P. Jung, Myungwoong Kim

Faculty Publications

We demonstrate a single-component hydrophilic photocrosslinkable copolymer system that incorporates all critical functionalities into one chain. This design allows for the creation of uniform functional organic coatings on a variety of substrates. The copolymers were composed of a poly(ethylene oxide)-containing monomer, a monomer that can release a primary amine upon UV light, and a monomer with reactive epoxide or cyclic dithiocarbonate with a primary amine. These copolymers are easily incorporated into the solution-casting process using polar solvents. Furthermore, the resulting coating can be readily stabilized through UV light-induced crosslinking, providing an advantage for controlling the surface properties of various substrates. …

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Method For Assessing Coating Uniformity Of Angioplasty Balloons Coated With Poly(Lactic-Co-Glycolic Acid) Nanoparticles Loaded With Quercetin, Allison D. Zieschang, Kevin F. Hoffseth, Tammy R. Dugas, Carlos E. Astete, Dorin Boldor Jan 2024

Method For Assessing Coating Uniformity Of Angioplasty Balloons Coated With Poly(Lactic-Co-Glycolic Acid) Nanoparticles Loaded With Quercetin, Allison D. Zieschang, Kevin F. Hoffseth, Tammy R. Dugas, Carlos E. Astete, Dorin Boldor

Faculty Publications

In this study, we aim to quantify coating uniformity and correlate fluorescence intensity to drug loading for drug-coated angioplasty balloons (DCB) coated with 5, 10, 15, or 20 layers of poly(lactic-co-glycolic acid) nanoparticles (NPs) entrapped with quercetin. Uniformity was quantified from histograms and horizontal line profiles of microscopic fluorescent images acquired with sample specific parameters, and cracks in the coating were measured and counted. The fluorescence of images acquired with global parameters was correlated with quercetin loading measured via gravimetric/HPLC analysis. More layers on DCBs may be associated with less uniform coatings, as indicated by differences in histogram standard deviations. …

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Cannabidiol Acts As Molecular Switch In Innate Immune Cells To Promote The Biosynthesis Of Inflammation-Resolving Lipid Mediators, Lukas K. Peltner, Lars Gluthmann, Friedemann Börner, Simona Pace, Robert K. Hoffstetter, Christian Kretzer, Rosella Bilancia, Federica Pollastro, Andreas Koeberle, Giovanni Appendino, Antonietta Rossi, Marcia E. Newcomer, Nathaniel C. Gilbert, Oliver Werz, Paul M. Jordan Dec 2023

Cannabidiol Acts As Molecular Switch In Innate Immune Cells To Promote The Biosynthesis Of Inflammation-Resolving Lipid Mediators, Lukas K. Peltner, Lars Gluthmann, Friedemann Börner, Simona Pace, Robert K. Hoffstetter, Christian Kretzer, Rosella Bilancia, Federica Pollastro, Andreas Koeberle, Giovanni Appendino, Antonietta Rossi, Marcia E. Newcomer, Nathaniel C. Gilbert, Oliver Werz, Paul M. Jordan

Faculty Publications

Cannabinoids are phytochemicals from cannabis with anti-inflammatory actions in immune cells. Lipid mediators (LM), produced from polyunsaturated fatty acids (PUFA), are potent regulators of the immune response and impact all stages of inflammation. How cannabinoids influence LM biosynthetic networks is unknown. Here, we reveal cannabidiol (CBD) as a potent LM class-switching agent that stimulates the production of specialized pro-resolving mediators (SPMs) but suppresses pro-inflammatory eicosanoid biosynthesis. Detailed metabololipidomics analysis in human monocyte-derived macrophages showed that CBD (i) upregulates exotoxin-stimulated generation of SPMs, (ii) suppresses 5-lipoxygenase (LOX)-mediated leukotriene production, and (iii) strongly induces SPM and 12/15-LOX product formation in resting cells …

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Progenitor Cell Isolation From Mouse Epididymal Adipose Tissue And Sequencing Library Construction, Qianglin Liu, Chaoyang Li, Yuxia Li, Leshan Wang, Xujia Zhang, Buhao Deng, Peidong Gao, Mohammad Shiri, Fozi Alkaifi, Junxing Zhao, Jacqueline M. Stephens, Constantine A. Simintiras, Joseph Francis, Jiangwen Sun, Xing Fu Dec 2023

Progenitor Cell Isolation From Mouse Epididymal Adipose Tissue And Sequencing Library Construction, Qianglin Liu, Chaoyang Li, Yuxia Li, Leshan Wang, Xujia Zhang, Buhao Deng, Peidong Gao, Mohammad Shiri, Fozi Alkaifi, Junxing Zhao, Jacqueline M. Stephens, Constantine A. Simintiras, Joseph Francis, Jiangwen Sun, Xing Fu

Faculty Publications

Here, we present a protocol to isolate progenitor cells from mouse epididymal visceral adipose tissue and construct bulk RNA and assay for transposase-accessible chromatin with sequencing (ATAC-seq) libraries. We describe steps for adipose tissue collection, cell isolation, and cell staining and sorting. We then detail procedures for both ATAC-seq and RNA sequencing library construction. This protocol can also be applied to other tissues and cell types directly or with minor modifications. For complete details on the use and execution of this protocol, please refer to Liu et al. (2023).1

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Mixed Method Study On Community College Instruction In Blended Social Science Courses, Andrea L. B. Eggenberger Dec 2023

Mixed Method Study On Community College Instruction In Blended Social Science Courses, Andrea L. B. Eggenberger

LSU Doctoral Dissertations

Community colleges have teaching faculty whose primary focus is educating their students and providing service to their institution. Community college teaching research has focused on innovation, students’ expectations, and the use of active learning techniques to foster student success. Research on blended courses has focused on instructional practices, learner engagement, and the benefits of blended learning for the community college student population. This study explores the relationship between student’s perceptions of the work in a blended developmental psychology course at two community colleges in Louisiana and their professors’ instructional decisions for their blended courses. The multiple-case study uses a convergent …

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A 30-Year Dataset Of Co2 In Flowing Freshwaters In The United States, Timothy R. Toavs, Caleb T. Hasler, Cory D. Suski, Stephen R. Midway Dec 2023

A 30-Year Dataset Of Co2 In Flowing Freshwaters In The United States, Timothy R. Toavs, Caleb T. Hasler, Cory D. Suski, Stephen R. Midway

Faculty Publications

Increasing atmospheric carbon dioxide (CO2) concentrations have been linked to effects in a wide range of ecosystems and organisms, with negative effects of elevated CO2 documented for marine organisms. Less is known about the dynamics of CO2 in freshwaters, but the potential exists for freshwater organisms to be challenged by elevated CO2. In flowing freshwaters CO2 exhibits more variability than in lakes or the ocean, yet spatiotemporally extensive direct measures of CO2 in freshwater are rare. However, CO2 can be estimated from pH, temperature, and alkalinity—commonly collected water quality metrics. We used data from the National Water Quality Monitoring Council …

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Global Responses To The Covid-19 Pandemic By Recreational Anglers: Considerations For Developing More Resilient And Sustainable Fisheries, J. Robert Britton, Adrian C. Pinder, Josep Alós, Robert Arlinghaus, Andy J. Danylchuk, Wendy Edwards, Kátia M.F. Freire, Casper Gundelund, Kieran Hyder, Ivan Jarić, Robert Lennox, Wolf Christian Lewin, Abigail J. Lynch, Stephen R. Midway, Warren M. Potts, Karina L. Ryan, Christian Skov, Harry V. Strehlow, Sean R. Tracey, Jun Ichi Tsuboi, Paul A. Venturelli, Jessica L. Weir, Marc Simon Weltersbach, Steven J. Cooke Dec 2023

Global Responses To The Covid-19 Pandemic By Recreational Anglers: Considerations For Developing More Resilient And Sustainable Fisheries, J. Robert Britton, Adrian C. Pinder, Josep Alós, Robert Arlinghaus, Andy J. Danylchuk, Wendy Edwards, Kátia M.F. Freire, Casper Gundelund, Kieran Hyder, Ivan Jarić, Robert Lennox, Wolf Christian Lewin, Abigail J. Lynch, Stephen R. Midway, Warren M. Potts, Karina L. Ryan, Christian Skov, Harry V. Strehlow, Sean R. Tracey, Jun Ichi Tsuboi, Paul A. Venturelli, Jessica L. Weir, Marc Simon Weltersbach, Steven J. Cooke

Faculty Publications

The global COVID-19 pandemic resulted in many jurisdictions implementing orders restricting the movements of people to inhibit virus transmission, with recreational angling often either not permitted or access to fisheries and/or related infrastructure being prevented. Following the lifting of restrictions, initial angler surveys and licence sales suggested increased participation and effort, and altered angler demographics, but with evidence remaining limited. Here, we overcome this evidence gap by identifying temporal changes in angling interest, licence sales, and angling effort in world regions by comparing data in the ‘pre-pandemic’ (up to and including 2019); ‘acute pandemic’ (2020) and ‘COVID-acclimated’ (2021) periods. We …

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Atmospheric Flash Drought In The Caribbean, Craig A. Ramseyer, Paul W. Miller Dec 2023

Atmospheric Flash Drought In The Caribbean, Craig A. Ramseyer, Paul W. Miller

Faculty Publications

Despite the intensifying interest in flash drought both within the United States and globally, moist tropical landscapes have largely escaped the attention of the flash drought community. Because these ecozones are acclimatized to receiving regular, near-daily precipitation, they are especially vulnerable to rapid-drying events. This is particularly true within the Caribbean Sea basin where numerous small islands lack the surface and groundwater resources to cope with swiftly developing drought conditions. This study fills the tropical flash drought gap by examining the pervasiveness of flash drought across the pan-Caribbean region using a recently proposed criterion based on the evaporative demand drought …

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Soil Legacy Nutrients Contribute To The Decreasing Stoichiometric Ratio Of N And P Loading From The Mississippi River Basin, Zihao Bian, Hanqin Tian, Shufen Pan, Hao Shi, Chaoqun Lu, Christopher Anderson, Wei Jun Cai, Charles S. Hopkinson, Dubravko Justic, Latif Kalin, Steven Lohrenz, Steven Mcnulty, Naiqing Pan, Ge Sun, Zhuonan Wang, Yuanzhi Yao, Yongfa You Dec 2023

Soil Legacy Nutrients Contribute To The Decreasing Stoichiometric Ratio Of N And P Loading From The Mississippi River Basin, Zihao Bian, Hanqin Tian, Shufen Pan, Hao Shi, Chaoqun Lu, Christopher Anderson, Wei Jun Cai, Charles S. Hopkinson, Dubravko Justic, Latif Kalin, Steven Lohrenz, Steven Mcnulty, Naiqing Pan, Ge Sun, Zhuonan Wang, Yuanzhi Yao, Yongfa You

Faculty Publications

Human-induced nitrogen–phosphorus (N, P) imbalance in terrestrial ecosystems can lead to disproportionate N and P loading to aquatic ecosystems, subsequently shifting the elemental ratio in estuaries and coastal oceans and impacting both the structure and functioning of aquatic ecosystems. The N:P ratio of nutrient loading to the Gulf of Mexico from the Mississippi River Basin increased before the late 1980s driven by the enhanced usage of N fertilizer over P fertilizer, whereafter the N:P loading ratio started to decrease although the N:P ratio of fertilizer application did not exhibit a similar trend. Here, we hypothesize that different release rates of …

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Identifying Healthy Individuals With Alzheimer’S Disease Neuroimaging Phenotypes In The Uk Biobank, Tiago Azevedo, Richard A.I. Bethlehem, David J. Whiteside, Nol Swaddiwudhipong, James B. Rowe, Pietro Lió, Timothy Rittman, Gail Li, Eric C. Petrie, Elaine R. Peskind, Teresa Villena, Walter Martinez, Carl Sadowsky, Athena Lee, Lisa Ravdin, Michael Lin, Gloria Chiang, Norman Relkin, Robert B. Santulli, Mary L. Hynes, Marc Seltzer, Laura A. Flashman, Karen Anderson, Karen Blank, Godfrey D. Pearlson, Smita Kittur, Stephen Correia, Paul Malloy, Stephen Salloway, Steven Potkin, Paul Newhouse, Angelica Garcia, Jiong Shi, Joseph Masdeu Dec 2023

Identifying Healthy Individuals With Alzheimer’S Disease Neuroimaging Phenotypes In The Uk Biobank, Tiago Azevedo, Richard A.I. Bethlehem, David J. Whiteside, Nol Swaddiwudhipong, James B. Rowe, Pietro Lió, Timothy Rittman, Gail Li, Eric C. Petrie, Elaine R. Peskind, Teresa Villena, Walter Martinez, Carl Sadowsky, Athena Lee, Lisa Ravdin, Michael Lin, Gloria Chiang, Norman Relkin, Robert B. Santulli, Mary L. Hynes, Marc Seltzer, Laura A. Flashman, Karen Anderson, Karen Blank, Godfrey D. Pearlson, Smita Kittur, Stephen Correia, Paul Malloy, Stephen Salloway, Steven Potkin, Paul Newhouse, Angelica Garcia, Jiong Shi, Joseph Masdeu

Clinical Research Faculty Publications

Spotting people with dementia early is challenging, but important to identify people for trials of treatment and prevention. We used brain scans of people with Alzheimer’s disease, the commonest type of dementia, and applied an artificial intelligence method to spot people with Alzheimer’s disease. We used this to find people in the Healthy UK Biobank study who might have early Alzheimer’s disease. The people we found had subtle changes in their memory and thinking to suggest they may have early disease, and we also found they had high blood pressure and smoked for longer. We have demonstrated an approach that …

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Refining The Diagnosis Of Gestational Diabetes Mellitus: A Systematic Review And Meta-Analysis, Ellen C. Francis, Camille E. Powe, William L. Lowe, Sara L. White, Sara L. White, Denise M. Scholtens, Jiaxi Yang, Yeyi Zhu, Cuilin Zhang, Marie France Hivert, Marie France Hivert, Soo Heon Kwak, Arianne Sweeting, Paul W. Franks, Stephen S. Rich, Robert Wagner, Tina Vilsbøll, Kimberly K. Vesco, Miriam S. Udler, Tiinamaija Tuomi, Emily K. Sims, Jennifer L. Sherr, Robert K. Semple, Rebecca M. Reynolds, Maria J. Redondo, Leanne M. Redman, Richard E. Pratley, Rodica Pop-Busui, Toni I. Pollin, Wei Perng, Ewan R. Pearson, Susan E. Ozanne, Katharine R. Owen, Richard Oram Dec 2023

Refining The Diagnosis Of Gestational Diabetes Mellitus: A Systematic Review And Meta-Analysis, Ellen C. Francis, Camille E. Powe, William L. Lowe, Sara L. White, Sara L. White, Denise M. Scholtens, Jiaxi Yang, Yeyi Zhu, Cuilin Zhang, Marie France Hivert, Marie France Hivert, Soo Heon Kwak, Arianne Sweeting, Paul W. Franks, Stephen S. Rich, Robert Wagner, Tina Vilsbøll, Kimberly K. Vesco, Miriam S. Udler, Tiinamaija Tuomi, Emily K. Sims, Jennifer L. Sherr, Robert K. Semple, Rebecca M. Reynolds, Maria J. Redondo, Leanne M. Redman, Richard E. Pratley, Rodica Pop-Busui, Toni I. Pollin, Wei Perng, Ewan R. Pearson, Susan E. Ozanne, Katharine R. Owen, Richard Oram

Clinical Research Faculty Publications

Background: Perinatal outcomes vary for women with gestational diabetes mellitus (GDM). The precise factors beyond glycemic status that may refine GDM diagnosis remain unclear. We conducted a systematic review and meta-analysis of potential precision markers for GDM. Methods: Systematic literature searches were performed in PubMed and EMBASE from inception to March 2022 for studies comparing perinatal outcomes among women with GDM. We searched for precision markers in the following categories: maternal anthropometrics, clinical/sociocultural factors, non-glycemic biochemical markers, genetics/genomics or other -omics, and fetal biometry. We conducted post-hoc meta-analyses of a subset of studies with data on the association of maternal …

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The Influence Of Salinity And Vegetation Texture On The Ecological Roles Of Insects In Tidal Marshes In Louisiana, Benjamin G. Aker, Claudia Husseneder, Lane D. Foil Dec 2023

The Influence Of Salinity And Vegetation Texture On The Ecological Roles Of Insects In Tidal Marshes In Louisiana, Benjamin G. Aker, Claudia Husseneder, Lane D. Foil

Faculty Publications

Tidal marsh insect communities are influenced by both salinity and aspects of vegetation texture (vegetation diversity, plant density, and architectural structure). These factors affect the abundances and intra- and interguild interactions of these insects and should result in broad-scale variation in the distribution and ecological functioning of tidal marsh insect communities along these gradients. However, this assumption has not been tested within Gulf Coast marshes, and the insect communities and their ecological roles are not well known. This study identifies how family-level insect biodiversity varies by salinity and which factors are most important in affecting the distribution of insect functional …

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A Survey On Mosquito Control Knowledge And Insecticide Use In New Orleans, La, 2020–2021, Erin R. Cloherty, Janet C. Mcallister, James A. Ottea, Kristen Healy, Claudia Riegel Dec 2023

A Survey On Mosquito Control Knowledge And Insecticide Use In New Orleans, La, 2020–2021, Erin R. Cloherty, Janet C. Mcallister, James A. Ottea, Kristen Healy, Claudia Riegel

Faculty Publications

Mosquitoes are a known public nuisance and can vector various diseases. Historically, New Orleans, LA, has long been acquainted with the burden of mosquito-borne diseases, such as malaria and yellow fever in the 20th century and West Nile virus in the 21st century. Government mosquito control awareness campaigns have been around for decades as has the use of organophosphate and pyrethroid insecticides by mosquito abatement districts. However, few data are available on public perception of mosquito control and public usage of insecticides to kill mosquitoes in New Orleans. We conducted a survey from August 2020 to July 2021 to evaluate …

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Droid: Dose-Ranging Approach To Optimizing Dose In Oncology Drug Development, Beibei Guo, Ying Yuan Dec 2023

Droid: Dose-Ranging Approach To Optimizing Dose In Oncology Drug Development, Beibei Guo, Ying Yuan

Faculty Publications

In the era of targeted therapy, there has been increasing concern about the development of oncology drugs based on the “more is better” paradigm, developed decades ago for chemotherapy. Recently, the US Food and Drug Administration (FDA) initiated Project Optimus to reform the dose optimization and dose selection paradigm in oncology drug development. To accommodate this paradigm shifting, we propose a dose-ranging approach to optimizing dose (DROID) for oncology trials with targeted drugs. DROID leverages the well-established dose-ranging study framework, which has been routinely used to develop non-oncology drugs for decades, and bridges it with established oncology dose-finding designs to …

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Building Resilience To Extreme Weather And Climate Events In The Rural Water And Wastewater Sectors, Nathan P. Kettle, Sarah F. Trainor, Renee Edwards, Donald Antrobus, Curt Baranowski, Tina Buxbaum, Kevin Berry, Michael Brubaker, Kristine L. De Long, Steve Fries, Davin Holen, Barry Keim, Danielle Meeker, Harry Penn, Cheryl Rosa, Rick Thoman, John Walsh, Jian Zhang Dec 2023

Building Resilience To Extreme Weather And Climate Events In The Rural Water And Wastewater Sectors, Nathan P. Kettle, Sarah F. Trainor, Renee Edwards, Donald Antrobus, Curt Baranowski, Tina Buxbaum, Kevin Berry, Michael Brubaker, Kristine L. De Long, Steve Fries, Davin Holen, Barry Keim, Danielle Meeker, Harry Penn, Cheryl Rosa, Rick Thoman, John Walsh, Jian Zhang

Faculty Publications

Extreme weather and climate events pose significant risks to rural water and wastewater systems. We examine the vulnerability of the water sector to weather and climate extremes in rural, predominantly Indigenous and underserved coastal areas and analyze how networks support resilience. Drawing on the analysis of 39 web-based questionnaire responses and 19 interviews with rural water and wastewater managers and service providers in southern Louisiana and western Alaska, this article reports a range of interrelated historical, environmental, and social factors that influence vulnerability to extreme weather events. Formal and informal social networks serve multiple roles in building resilience. These roles …

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A Trait Dataset For Freshwater Mussels Of The United States Of America, Garrett W. Hopper, Jamie R. Bucholz, Traci P. Dubose, Kaelyn J. Fogelman, Sean M. Keogh, Megan E. Kubala, Matthew B. Lodato, David H. Nichols, Irene Sánchez González, John M. Pfeiffer, James A. Stoeckel, Jeffrey D. Lozier, Carla L. Atkinson Dec 2023

A Trait Dataset For Freshwater Mussels Of The United States Of America, Garrett W. Hopper, Jamie R. Bucholz, Traci P. Dubose, Kaelyn J. Fogelman, Sean M. Keogh, Megan E. Kubala, Matthew B. Lodato, David H. Nichols, Irene Sánchez González, John M. Pfeiffer, James A. Stoeckel, Jeffrey D. Lozier, Carla L. Atkinson

Faculty Publications

The United States of America has a diverse collection of freshwater mussels comprising 301 species distributed among 59 genera and two families (Margaritiferidae and Unionidae), each having a unique suite of traits. Mussels are among the most imperilled animals and are critical components of their ecosystems, and successful management, conservation and research requires a cohesive and widely accessible data source. Although trait-based analysis for mussels has increased, only a small proportion of traits reflecting mussel diversity in this region has been collated. Decentralized and non-standardized trait information impedes large-scale analysis. Assembling trait data in a synthetic dataset enables comparison across …

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New Insights In The Mechanisms Of Weight-Loss Maintenance: Summary From A Pennington Symposium, Emily W. Flanagan, Redin Spann, Sarah E. Berry, Hans Rudolf Berthoud, Stephanie Broyles, Gary D. Foster, Jonathan Krakoff, Ruth J.F. Loos, Michael R. Lowe, Danielle M. Ostendorf, Tiffany M. Powell-Wiley, Leanne M. Redman, Michael Rosenbaum, Philip R. Schauer, Randy J. Seeley, Boyd A. Swinburn, Kevin Hall, Eric Ravussin Dec 2023

New Insights In The Mechanisms Of Weight-Loss Maintenance: Summary From A Pennington Symposium, Emily W. Flanagan, Redin Spann, Sarah E. Berry, Hans Rudolf Berthoud, Stephanie Broyles, Gary D. Foster, Jonathan Krakoff, Ruth J.F. Loos, Michael R. Lowe, Danielle M. Ostendorf, Tiffany M. Powell-Wiley, Leanne M. Redman, Michael Rosenbaum, Philip R. Schauer, Randy J. Seeley, Boyd A. Swinburn, Kevin Hall, Eric Ravussin

Division of Basic Science Faculty Publications

Obesity is a chronic disease that affects more than 650 million adults worldwide. Obesity not only is a significant health concern on its own, but predisposes to cardiometabolic comorbidities, including coronary heart disease, dyslipidemia, hypertension, type 2 diabetes, and some cancers. Lifestyle interventions effectively promote weight loss of 5% to 10%, and pharmacological and surgical interventions even more, with some novel approved drugs inducing up to an average of 25% weight loss. Yet, maintaining weight loss over the long-term remains extremely challenging, and subsequent weight gain is typical. The mechanisms underlying weight regain remain to be fully elucidated. The purpose …

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Sensory Spinal Interoceptive Pathways And Energy Balance Regulation, Heike Münzberg, Hans Rudolf Berthoud, Winfried L. Neuhuber Dec 2023

Sensory Spinal Interoceptive Pathways And Energy Balance Regulation, Heike Münzberg, Hans Rudolf Berthoud, Winfried L. Neuhuber

Division of Basic Science Faculty Publications

Interoception plays an important role in homeostatic regulation of energy intake and metabolism. Major interoceptive pathways include gut-to-brain and adipose tissue-to brain signaling via vagal sensory nerves and hormones, such as leptin. However, signaling via spinal sensory neurons is rapidly emerging as an additional important signaling pathway. Here we provide an in-depth review of the known anatomy and functions of spinal sensory pathways and discuss potential mechanisms relevant for energy balance homeostasis in health and disease. Because sensory innervation by dorsal root ganglia (DRG) neurons goes far beyond vagally innervated viscera and includes adipose tissue, skeletal muscle, and skin, it …

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Amazonian Mixed-Species Flocks Demonstrate Flexible Preferences For Vertical Forest Structure, Charles P.J. Coddington, W. Justin Cooper, Cameron L. Rutt, Karl Mokross, Bruna R. Amaral, Philip C. Stouffer, David A. Luther Dec 2023

Amazonian Mixed-Species Flocks Demonstrate Flexible Preferences For Vertical Forest Structure, Charles P.J. Coddington, W. Justin Cooper, Cameron L. Rutt, Karl Mokross, Bruna R. Amaral, Philip C. Stouffer, David A. Luther

Faculty Publications

How species interact with human-disturbed environments is a central focus of conservation biology. Within disturbed landscapes, regenerating forests have potential to provide habitat for forest species, especially as increasing amounts of primary forest are lost. As secondary forest regenerates beside primary forest, it increases habitat heterogeneity. However, relatively little is known about the influence of habitat heterogeneity on space use. In this study, we analyzed the topography and vertical vegetation structure of regenerating forest, small forest fragments, and undisturbed rainforest in the central Amazon to determine (1) how these structural characteristics influence understory mixed-species flock space use and (2) how …

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Modeling Of Cryopreservation Pathway Operation At An Aquatic Biomedical Stock Center For Zebrafish, Sarah Bodenstein, Fidan Abdullayeva, Joy M. Murphy, Zoltan M. Varga, Terrence R. Tiersch Dec 2023

Modeling Of Cryopreservation Pathway Operation At An Aquatic Biomedical Stock Center For Zebrafish, Sarah Bodenstein, Fidan Abdullayeva, Joy M. Murphy, Zoltan M. Varga, Terrence R. Tiersch

Faculty Publications

Aquatic biomedical model organisms play a substantial role in advancing our understanding of human health, however, comparably little work has been directed towards developing dependable, high-throughput storage programs for valuable genetic resources. The Zebrafish International Resource Center (ZIRC) has developed a standardized cryopreservation pathway and stored thousands of genetic lines in their repository for use by the biomedical research community. This has yet to be replicated in other facilities, and an overall repository-level pathway has never been analyzed for aquatic species. To encourage repository development for other biomedical models and to improve the ZIRC storage process and system, this study …

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Leslie Paul Kozak, Phd (1940-2023), Eric Ravussin, Sven Enerback, Robert Koza Dec 2023

Leslie Paul Kozak, Phd (1940-2023), Eric Ravussin, Sven Enerback, Robert Koza

Clinical Research Faculty Publications

No abstract provided.

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Effect Of An Acute Long-Duration Exercise Bout On Skeletal Muscle Lipid Droplet Morphology, Glut 4 Protein, And Perilipin Protein Expression, Sudip Bajpeyi, Jehu N. Apaflo, Victoria Rosas, Keisha Sepulveda-Rivera, Armando Varela-Ramirez, Jeffrey D. Covington, Jose E. Galgani, Eric Ravussin Dec 2023

Effect Of An Acute Long-Duration Exercise Bout On Skeletal Muscle Lipid Droplet Morphology, Glut 4 Protein, And Perilipin Protein Expression, Sudip Bajpeyi, Jehu N. Apaflo, Victoria Rosas, Keisha Sepulveda-Rivera, Armando Varela-Ramirez, Jeffrey D. Covington, Jose E. Galgani, Eric Ravussin

Clinical Research Faculty Publications

Purpose: Smaller lipid droplet morphology and GLUT 4 protein expression have been associated with greater muscle oxidative capacity and glucose uptake, respectively. The main purpose of this study was to determine the effect of an acute long-duration exercise bout on skeletal muscle lipid droplet morphology, GLUT4, perilipin 3, and perilipin 5 expressions. Methods: Twenty healthy men (age 24.0 ± 1.0 years, BMI 23.6 ± 0.4 kg/m2) were recruited for the study. The participants were subjected to an acute bout of exercise on a cycle ergometer at 50% VO2max until they reached a total energy expenditure of 650 kcal. The study …

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Body Shape Perception In Men And Women Without Obesity During Caloric Restriction: A Secondary Analysis From The Calerie Study, Maci M. Jacobson, Alexis M. Gardner, Camilla E. Handley, Michael W. Smith, William F. Christensen, Chad R. Hancock, Paule V. Joseph, Michael J. Larson, Corby K. Martin, James D. Lecheminant Dec 2023

Body Shape Perception In Men And Women Without Obesity During Caloric Restriction: A Secondary Analysis From The Calerie Study, Maci M. Jacobson, Alexis M. Gardner, Camilla E. Handley, Michael W. Smith, William F. Christensen, Chad R. Hancock, Paule V. Joseph, Michael J. Larson, Corby K. Martin, James D. Lecheminant

Clinical Research Faculty Publications

Objective: To examine body shape perception in 218 adults without obesity or history of eating disorders during caloric restriction (CR). Methods: Comprehensive Assessment of Long-term Effects of Reducing Intake of Energy (CALERIE) is a 2-year, randomized clinical trial using a 2:1 assignment (CR, 25% reduction in calories; Control, typical diet). For this secondary analysis, we examined perceived body shape using the Body Shape Questionnaire (BSQ). Analyses of BSQ scores are reported by group, over time, by sex, and by BMI. Data for body fat percentage, symptoms of depression, food cravings, maximal oxygen consumption, and stress were analyzed for their association …

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Physiologic Hormone Administration Improves Hba1c In Native Americans With Type 2 Diabetes: A Retrospective Study And Review Of Insulin Secretion And Action, Candida J. Rebello, Tyler S. Morales, Katsya Chuon, Shu Dong, V. Tyrone Lam, Dan Purner, Stanley Lewis, Jonathan Lakey, Robbie A. Beyl, Frank L. Greenway Dec 2023

Physiologic Hormone Administration Improves Hba1c In Native Americans With Type 2 Diabetes: A Retrospective Study And Review Of Insulin Secretion And Action, Candida J. Rebello, Tyler S. Morales, Katsya Chuon, Shu Dong, V. Tyrone Lam, Dan Purner, Stanley Lewis, Jonathan Lakey, Robbie A. Beyl, Frank L. Greenway

Clinical Research Faculty Publications

Insulin is secreted in pulses from pancreatic beta-cells, and these oscillations maintain fasting plasma glucose levels within a narrow normal range. Within islets, beta-cells exhibit tight synchronization of regular oscillations. This control circuit is disrupted in type 2 diabetes, and irregularities in pulse frequency and amplitude occur. The prevalence of type 2 diabetes is three times higher in American Indian and Native Alaskans compared to Whites, and their genetic ancestry is associated with low beta-cell function. Obesity in this population compounds their vulnerability to adverse outcomes. The purpose of this article is to review insulin secretion and action and its …

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An Aerobic Exercise Intervention To Improve Metabolic Health Among People Living With Hiv With At-Risk Alcohol Use: The Alive-Ex Research Study Protocol, Liz Simon, Stefany D. Primeaux, Danielle E. Levitt, Brianna Bourgeois, Neil M. Johannsen, Adrianna Peters, Jameel Ahmed, Richard H. Marshall, Alexandra H. Fairchild, Tekeda F. Ferguson, Patricia E. Molina Dec 2023

An Aerobic Exercise Intervention To Improve Metabolic Health Among People Living With Hiv With At-Risk Alcohol Use: The Alive-Ex Research Study Protocol, Liz Simon, Stefany D. Primeaux, Danielle E. Levitt, Brianna Bourgeois, Neil M. Johannsen, Adrianna Peters, Jameel Ahmed, Richard H. Marshall, Alexandra H. Fairchild, Tekeda F. Ferguson, Patricia E. Molina

Clinical Research Faculty Publications

Background: Effective antiretroviral therapy (ART) in people living with HIV (PLWH) has improved life expectancy and increased risk of age-associated cardiometabolic comorbidities. At-risk alcohol use is more frequent among PLWH and increases the risk of health challenges. PLWH with at-risk alcohol use are more likely to meet criteria for prediabetes/diabetes and this is associated with impaired whole-body glucose-insulin dynamics. Methods: The Alcohol & Metabolic Comorbidities in PLWH: Evidence Driven Interventions Study (ALIVE-Ex Study, NCT03299205) is a longitudinal, prospective, interventional study to determine the effects of an aerobic exercise protocol on improving dysglycemia among PLWH with at-risk alcohol use. The intervention …

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An Examination Of The Relationships Between The Neighborhood Social Environment, Adiposity, And Cardiometabolic Disease Risk In Adolescence: A Cross-Sectional Study, Kara D. Denstel, Robbie A. Beyl, Denise M. Danos, Maura M. Kepper, Amanda E. Staiano, Katherine T. Theall, Tung Sung Tseng, Stephanie T. Broyles Dec 2023

An Examination Of The Relationships Between The Neighborhood Social Environment, Adiposity, And Cardiometabolic Disease Risk In Adolescence: A Cross-Sectional Study, Kara D. Denstel, Robbie A. Beyl, Denise M. Danos, Maura M. Kepper, Amanda E. Staiano, Katherine T. Theall, Tung Sung Tseng, Stephanie T. Broyles

Population and Public Health Science Faculty Publications

Background: Disadvantaged neighborhood environments are a source of chronic stress which undermines optimal adolescent health. This study investigated relationships between the neighborhood social environment, specifically, chronic stress exposures, adiposity, and cardiometabolic disease risk factors among 288 Louisiana adolescents aged 10 to 16 years. Methods: This cross-sectional study utilized baseline data from the Translational Investigation of Growth and Everyday Routines in Kids (TIGER Kids) study. Adolescent data were obtained using self-reported questionnaires (demographics and perceived neighborhood disorder), anthropometry, body imaging, and a blood draw while objective neighborhood data for the concentrated disadvantage index were acquired from the 2016 American Community Survey …

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Spin-4/Spinster Supports Sperm Activation In C. Elegans Via Sphingosine-1-Phosphate Transport, Yash Flora, K. Adam Bohnert Dec 2023

Spin-4/Spinster Supports Sperm Activation In C. Elegans Via Sphingosine-1-Phosphate Transport, Yash Flora, K. Adam Bohnert

Faculty Publications

Spermiogenesis, a sperm-activation step, is crucial for the transformation of immotile spermatids into motile sperm. Though membrane transport of ions and molecules across the sperm plasma membrane has been implicated in this process, the full repertoire of transporters involved, and their respective substrates, is unclear. Here, we report that the major facilitator superfamily transporter SPIN-4/Spinster governs efficient spermiogenesis and fertility in the hermaphrodite nematode Caenorhabditis elegans. Unlike other C. elegans Spinster paralogs, SPIN-4 is germline-expressed. Moreover, SPIN-4 expression is gamete-specific; it is strongly expressed in developing sperm, where it localizes to the plasma membrane, but it is absent from oocytes. …

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Ketogenic Propensity Is Differentially Related To Lipid-Induced Hepatic And Peripheral Insulin Resistance, J. T. Mey, B. Vandagmansar, W. S. Dantas, K. P. Belmont, C. L. Axelrod, J. P. Kirwan Dec 2023

Ketogenic Propensity Is Differentially Related To Lipid-Induced Hepatic And Peripheral Insulin Resistance, J. T. Mey, B. Vandagmansar, W. S. Dantas, K. P. Belmont, C. L. Axelrod, J. P. Kirwan

Division of Basic Science Faculty Publications

Aim: Determine the ketogenic response (β-hydroxybutyrate, a surrogate of hepatic ketogenesis) to a controlled lipid overload in humans. Methods: In total, nineteen young, healthy adults (age: 28.4 ± 1.7 years; BMI: 22.7 ± 0.3 kg/m2) received either a 12 h overnight lipid infusion or saline in a randomized, crossover design. Plasma ketones and inflammatory markers were quantified by colorimetric and multiplex assays. Hepatic and peripheral insulin sensitivity was assessed by the hyperinsulinemic–euglycemic clamp. Skeletal muscle biopsies were obtained to quantify gene expression related to ketone body metabolism and inflammation. Results: By design, the lipid overload-induced hepatic (50%, p < 0.001) and peripheral insulin resistance (73%, p < 0.01) in healthy adults. Ketones increased with hyperlipidemia and were subsequently reduced with hyperinsulinemia during the clamp procedure (Saline: Basal = 0.22 mM, Insulin = 0.07 mM; Lipid: Basal = 0.78 mM, Insulin = 0.51 mM; 2-way ANOVA: Lipid p < 0.001, Insulin p < 0.001, Interaction p = 0.07). In the saline control condition, ketones did not correlate with hepatic or peripheral insulin sensitivity. Conversely, in the lipid condition, ketones were positively correlated with hepatic insulin sensitivity (r = 0.59, p < 0.01), but inversely related to peripheral insulin sensitivity (r = −0.64, p < 0.01). Hyperlipidemia increased plasma inflammatory markers, but did not impact skeletal muscle inflammatory gene expression. Gene expression related to ketone and fatty acid metabolism in skeletal muscle increased in response to hyperlipidemia. Conclusion: This work provides important insight into the role of ketones in human health and suggests that ketone body metabolism is altered at the onset of lipid-induced insulin resistance.

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Weight-Independent Effects Of Roux-En-Y Gastric Bypass Surgery On Remission Of Nonalcoholic Fatty Liver Disease In Mice, Christopher L. Axelrod, Ingeborg Langohr, Wagner S. Dantas, Elizabeth C. Heintz, Bolormaa Vandanmagsar, Shengping Yang, Elizabeth R.M. Zunica, R. Leigh Townsend, Vance L. Albaugh, Hans Rudolf Berthoud, John P. Kirwan Dec 2023

Weight-Independent Effects Of Roux-En-Y Gastric Bypass Surgery On Remission Of Nonalcoholic Fatty Liver Disease In Mice, Christopher L. Axelrod, Ingeborg Langohr, Wagner S. Dantas, Elizabeth C. Heintz, Bolormaa Vandanmagsar, Shengping Yang, Elizabeth R.M. Zunica, R. Leigh Townsend, Vance L. Albaugh, Hans Rudolf Berthoud, John P. Kirwan

Division of Basic Science Faculty Publications

Objective: Obesity is a driver of non-alcoholic fatty liver disease (NAFLD), and interventions that decrease body weight, such as bariatric surgery and/or calorie restriction (CR), may serve as effective therapies. This study compared the effects of Roux-en-Y gastric bypass surgery (RYGB) and CR on hepatic function in mice with obesity and NAFLD. Methods: C57BL/6J mice were fed a high-fat diet to promote obesity. At 16 weeks of age, mice were randomized to sham surgery (sham), RYGB, or CR weight matched to RYGB (WM). Body weight/composition, food intake, and energy expenditure (EE) were measured throughout treatment. Liver histopathology was evaluated from …

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Participant Characteristics In The Prevention Of Gestational Diabetes As Evidence For Precision Medicine: A Systematic Review And Meta-Analysis, Siew Lim, Siew Lim, Wubet Worku Takele, Kimberly K. Vesco, Leanne M. Redman, Wesley Hannah, Wesley Hannah, Maxine P. Bonham, Mingling Chen, Sian C. Chivers, Andrea J. Fawcett, Andrea J. Fawcett, Jessica A. Grieger, Nahal Habibi, Gloria K.W. Leung, Kai Liu, Eskedar Getie Mekonnen, Maleesa Pathirana, Alejandra Quinteros, Rachael Taylor, Gebresilasea G. Ukke, Gebresilasea G. Ukke, Shao J. Zhou, Paul W. Franks, Stephen S. Rich, Robert Wagner, Tina Vilsbøll, Miriam S. Udler, Tiinamaija Tuomi, Arianne Sweeting, Emily K. Sims, Jennifer L. Sherr, Robert K. Semple, Rebecca M. Reynolds Dec 2023

Participant Characteristics In The Prevention Of Gestational Diabetes As Evidence For Precision Medicine: A Systematic Review And Meta-Analysis, Siew Lim, Siew Lim, Wubet Worku Takele, Kimberly K. Vesco, Leanne M. Redman, Wesley Hannah, Wesley Hannah, Maxine P. Bonham, Mingling Chen, Sian C. Chivers, Andrea J. Fawcett, Andrea J. Fawcett, Jessica A. Grieger, Nahal Habibi, Gloria K.W. Leung, Kai Liu, Eskedar Getie Mekonnen, Maleesa Pathirana, Alejandra Quinteros, Rachael Taylor, Gebresilasea G. Ukke, Gebresilasea G. Ukke, Shao J. Zhou, Paul W. Franks, Stephen S. Rich, Robert Wagner, Tina Vilsbøll, Miriam S. Udler, Tiinamaija Tuomi, Arianne Sweeting, Emily K. Sims, Jennifer L. Sherr, Robert K. Semple, Rebecca M. Reynolds

Clinical Research Faculty Publications

Background: Precision prevention involves using the unique characteristics of a particular group to determine their responses to preventive interventions. This study aimed to systematically evaluate the participant characteristics associated with responses to interventions in gestational diabetes mellitus (GDM) prevention. Methods: We searched MEDLINE, EMBASE, and Pubmed to identify lifestyle (diet, physical activity, or both), metformin, myoinositol/inositol and probiotics interventions of GDM prevention published up to May 24, 2022. Results: From 10347 studies, 116 studies (n = 40940 women) are included. Physical activity results in greater GDM reduction in participants with a normal body mass index (BMI) at baseline compared to …

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