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Articles 271 - 300 of 40155
Full-Text Articles in Entire DC Network
Identifying Textual Predictors Of Early Termination In Clinical Trials In Medicine: An Explainable Machine-Learning Study, Rohan Ramnarain
Identifying Textual Predictors Of Early Termination In Clinical Trials In Medicine: An Explainable Machine-Learning Study, Rohan Ramnarain
Dissertations, Theses, and Capstone Projects
About one in five clinical trials in medicine ends early, wasting valuable resources and reducing the evidence available for developing life-saving medical treatments. This project uses a method called Trial2Vec, which is a self-supervised machine-learning method that converts clinical trial documents into dense numerical representations that capture their key design and clinical characteristics, to turn each proposed clinical trial’s written protocol into a compact numerical profile (a process referred to as embedding). These profiles are then paired with a predictive machine learning models to identify the words and phrases in the trial documents that can signal a higher risk of …
Dock7 Is A Novel Modifier Of Duchenne Muscular Dystrophy Pathology, Katherine English
Dock7 Is A Novel Modifier Of Duchenne Muscular Dystrophy Pathology, Katherine English
ETDs from 2020-2029
Duchenne muscular dystrophy (DMD) is a progressive, x-linked neuromuscular disorder affecting 1/5000 male births every year. DMD results from mutations in DMD, a critical structural protein within the muscle. In the absence of Dystrophin, the muscle degrades, increasing inflammation, destabilizing the cell membrane and going through constant cycles of regeneration which depletes the stem cell population. Over time, muscle tissue is replaced by fibrosis and adipose tissue, leading to loss of ambulation, respiratory and cardiac failure leading to death by early 20s. The standard of care for DMD patients is corticosteroid treatment. However, gene therapies have recently emerged which present …
Roots And Greens: Discovering The Power Of Indigenous Produce, Abiodun T. Atoloye, Sherif O. Olasoji, Ebunoluwa G. Ibidapo
Roots And Greens: Discovering The Power Of Indigenous Produce, Abiodun T. Atoloye, Sherif O. Olasoji, Ebunoluwa G. Ibidapo
Nutrition, Dietetics, and Food Sciences Courseware
The curriculum was designed in alignment with the Cognitive Theory of Multimedia Learning (CTML), Empowerment Theory (ET), and Social Cognitive Theory (SCT) frameworks. These frameworks were used to determine the selection and sequencing of learning activities. As reflected in CTML principles, the use of texts, images, infographics, and videos enhances knowledge retention and information comprehension and helps prevent cognitive overload. Through activities, homework, and family engagement, the principles of ET were incorporated into the curriculum to facilitate participants’ perceived control over food-related decisions. Additionally, by applying the principles of SCT, the curriculum incorporates scenario-based questions, opportunities to engage with peers, …
Title Page And Abstract: Diet Quality And Sustainability Based On Nut Intake Among Free-Living Adults, Raquel Aurora Martínez
Title Page And Abstract: Diet Quality And Sustainability Based On Nut Intake Among Free-Living Adults, Raquel Aurora Martínez
Loma Linda University Electronic Theses, Dissertations & Projects
Background: There is increasing interest in dietary patterns that support both human and planetary health. Plant-forward dietary patterns commonly promoted within sustainability frameworks frequently include nuts. Despite concerns regarding resource use, particularly water demands, nuts may contribute to improved diet quality and sustainable dietary behaviors.
Objectives: To examine whether diets characterized by higher nut intake are associated with dietary quality, adherence to sustainable dietary patterns, and food-related sustainability behaviors among free-living adults.
Methods: Cross-sectional analyses were conducted using data from an online validated semi-quantitative food frequency questionnaire integrated with sustainability-related survey items. Energy-adjusted nut intake was categorized …
A Predictive Coding Account Of Spatial Working Memory Following Prophylactic Levetiracetam Administration Prior To Traumatic Brain Injury, Omeima Mutwali
A Predictive Coding Account Of Spatial Working Memory Following Prophylactic Levetiracetam Administration Prior To Traumatic Brain Injury, Omeima Mutwali
Dissertations, Theses, and Capstone Projects
Traumatic brain injury (TBI) symptom prevention and remediation is an important area of research that would benefit vulnerable groups, including active-duty and veteran soldiers. These patients can sustain penetrative forces in fields of combat or in training, which result in focal lesions that trigger inflammatory and degenerative processes in the brain. Both primary and secondary injuries are associated with changes to cognition, behavior and affective state. This disease poses increased risk of epileptogenesis, as well. Given these outcomes, prior research has evaluated levetiracetam (LEV) as a prophylactic treatment for seizures, cognitive deficits and negative emotionality. LEV acts as a presynaptic …
Supramolecular Assembly In Short Peptide Systems For Selective Metabolite Recognition And Drug Nanoencapsulation, Maithreyi Ramakrishnan
Supramolecular Assembly In Short Peptide Systems For Selective Metabolite Recognition And Drug Nanoencapsulation, Maithreyi Ramakrishnan
Dissertations, Theses, and Capstone Projects
Short peptides can form adaptive supramolecular assemblies, and understanding how minimal sequences organize around neurometabolites or hydrophobic cancer drugs enables the rational design of functional materials. This thesis combines molecular dynamics with experimental validation to establish design rules linking peptide sequence to emergent structure and function. Chapter 1 outlines the molecular determinants governing peptide assembly. Chapter 2 reviews computational workflows that reveal sequence-dependent conformations and supramolecular organization. Chapter 3 applies these principles to Dynamic Peptide Libraries which identify tetrapeptides that selectively interact with neurometabolites. Chapter 4 extends the same interaction-driven framework to design tryptophan-rich pentapeptides that co-assemble with kinase inhibitors …
Computational Insights Into Nucleosome Dynamics In Epigenetics Using Molecular Dynamics Simulations, Rutika Patel
Computational Insights Into Nucleosome Dynamics In Epigenetics Using Molecular Dynamics Simulations, Rutika Patel
Dissertations, Theses, and Capstone Projects
Nucleosome core particles (NCP) are the building blocks that form a highly organized and compact chromatin structure. Nucleosomes package DNA in the nucleus of eukaryotic cells. The NCP consists of about 147 base pairs of DNA wrapped around the histone octamer, with 1.65 superhelical turns in a left-handed manner. The histone octamer is composed of two copies of H3, H4, H2A, and H2B. Together with histone H1 and linker DNA, they further assemble into a higher-order chromatin structure. The nucleosome complex is stabilized by electrostatic interactions between positively charged histone residues and the negatively charged DNA backbone. To effectively access …
Reducing The Complexity Of The Experimental Design Attenuates Trait-Level Effects In Threat Safety Discrimination Learning, Justin M. Lazzarino
Reducing The Complexity Of The Experimental Design Attenuates Trait-Level Effects In Threat Safety Discrimination Learning, Justin M. Lazzarino
Dissertations, Theses, and Capstone Projects
Trait measures of negative emotionality have sometimes been shown to play a role in shaping threat learning, but findings are mixed. For example, Johnson et al (2023) showed that the inhibitory and prospective subscales of the Intolerance for Uncertainty Scale (IUS) were associated with diminished and enhanced threat-safety discrimination, respectively, during the acquisition phase of a Pavlovian fear conditioning task. This finding was subsequently replicated in an independent sample (Kinney-Petrucha, 2024, unpublished). However, these findings and other trait-level fear acquisition effects have not been consistently observed in the broader fear learning literature. Variation in the complexity of or uncertainty inherent …
Exploring The Durability Of Marine Picocyanobacterial Microcolonies, Erik Swanson
Exploring The Durability Of Marine Picocyanobacterial Microcolonies, Erik Swanson
University Honors Theses
Picocyanobacteria of the genus Synechococcus are widespread aquatic photoautotrophs that play essential roles in primary production and carbon cycling. Some Synechococcus strains form multicellular microcolonies, but the mechanisms of cell-to-cell attachments and structural durability of these microcolonies remain poorly understood. This research investigated the physical durability of microcolonies in two marine Synechococcus strains (CC9605 and CC9311) using physical disruption treatments. Cultures were subjected to vortexing and sonication treatments, and populations of single cells and microcolonies were quantified using flow cytometry based on differences in measures of size. Results indicated that strain CC9605 showed no significant treatment effect, whereas CC9311 displayed …
Recent Advances In The Juvenile-To-Adult Phase Transition, Yifei Liao, Mingli Xu
Recent Advances In The Juvenile-To-Adult Phase Transition, Yifei Liao, Mingli Xu
Faculty Publications
The transition from the juvenile to adult vegetative phase in Arabidopsis thaliana is a fundamental developmental process that integrates morphological and physiological maturation. Despite extensive study, how vegetative phase change is regulated and how this phase transition is coordinated with plant physiology remain incompletely understood. This review synthesizes recent advances in the molecular regulation and physiological functions of vegetative phase change. We summarize how developmental traits—such as leaf shape, trichome distribution, and margin serration—are controlled through distinct downstream targets of the age-dependent miR156–SPL pathway. We further highlight emerging insights into how epigenetic factors dynamically modify chromatin states of key regulatory …
Neural Correlates Of Recognition Memory And Metamemory In Breast Cancer Survivors: An Event-Related Potential Study, Dishari Zaman Azad
Neural Correlates Of Recognition Memory And Metamemory In Breast Cancer Survivors: An Event-Related Potential Study, Dishari Zaman Azad
Dissertations, Theses, and Capstone Projects
Breast cancer survivors (BCS) often report noticeable cognitive difficulties despite showing limited impairment on standardized neuropsychological tests. Some have theorized that this is simply an insensitivity of standardized testing to subtle cognitive changes (test-insensitivity hypothesis), whereas others have suggested there are early neural changes that are detected by patients but precede detection by these tests (early signal hypothesis) or that when they achieve normal performance, it is through saliently effortful compensatory processes (compensation hypothesis). The present study tested these theories by assessing metamemory and recognition memory retrieval in BCS and non-cancer controls (NCC) using both behavioral and event-related potential (ERP) …
The Phoenix Flora: Plant Survival, Succession, And Putative Adaptation In The Post-Atomic Landscapes Of Hiroshima And Nagasaki, Gian Marco Ludovici, Paola Amelia Tassi, Alba Iannotti, Colomba Russo, Fausto D'Agostino, Matilde Neble Segade, Timothy Mousseau, Andrea Malizia
The Phoenix Flora: Plant Survival, Succession, And Putative Adaptation In The Post-Atomic Landscapes Of Hiroshima And Nagasaki, Gian Marco Ludovici, Paola Amelia Tassi, Alba Iannotti, Colomba Russo, Fausto D'Agostino, Matilde Neble Segade, Timothy Mousseau, Andrea Malizia
Faculty Publications
The atomic bombings of Hiroshima and Nagasaki in 1945 created a unique environment of acute, high-dose ionizing radiation, contrasting sharply with the chronic low-dose rate exposure in the Chernobyl and Fukushima Exclusion Zones. This stands in stark contrast to the chronic, low-dose rate contamination that defines the Chernobyl and Fukushima Exclusion Zones. While the long-term ecological effects of the latter are well-documented, a systematic synthesis of the floral response to the atomic bombings is lacking. This review integrates historical data with modern radio-ecological principles to analyze plant survival and succession. We document the remarkable recovery of vegetation, from the resprouting …
Decentralizing Dementia Research To The Us–Mexico Border: The Rio Grande Valley Ad-Rcmar As A Model For Translational Equity, Gladys E. Maestre, John Blangero, Eron Manusov, Gabriel A. De Erausquin, Francisco Fernandez, Silvia Mejia-Arango, Vincent P. Diego, Juan C. Lopez-Alvarenga, Claudia Alaniz, Neyra García, Rosa V. Pirela, Andrew Tsin, Michael Mahaney
Decentralizing Dementia Research To The Us–Mexico Border: The Rio Grande Valley Ad-Rcmar As A Model For Translational Equity, Gladys E. Maestre, John Blangero, Eron Manusov, Gabriel A. De Erausquin, Francisco Fernandez, Silvia Mejia-Arango, Vincent P. Diego, Juan C. Lopez-Alvarenga, Claudia Alaniz, Neyra García, Rosa V. Pirela, Andrew Tsin, Michael Mahaney
School of Medicine Publications
Translational equity means ensuring that diagnostics, treatments, care models, and prevention strategies are developed and implemented so they work for populations with the greatest burden and least access to care. In Alzheimer's disease and related dementias (ADRD), where most evidence derives from highly educated, non-Hispanic White participants at large academic centers, translational equity is critical to prevent misclassification, limited access, and widening disparities and to ensure that underrepresented communities shape how new knowledge moves into practice. Hispanic and other populations in the United States are disproportionately affected by ADRD yet remain underrepresented in research, with gaps especially pronounced in high-poverty …
The Phoenix Flora: Plant Survival, Succession, And Putative Adaptation In The Post-Atomic Landscapes Of Hiroshima And Nagasaki, Gian Marco Ludo, Paola Amelia Tassi, Alba Iannotti, Colomba Russo, Fausto D'Agostino, Matilde Neble Segade, Timothy Mousseau, Andrea Malizia
The Phoenix Flora: Plant Survival, Succession, And Putative Adaptation In The Post-Atomic Landscapes Of Hiroshima And Nagasaki, Gian Marco Ludo, Paola Amelia Tassi, Alba Iannotti, Colomba Russo, Fausto D'Agostino, Matilde Neble Segade, Timothy Mousseau, Andrea Malizia
Faculty Publications
The atomic bombings of Hiroshima and Nagasaki in 1945 created a unique environment of acute, high-dose ionizing radiation, contrasting sharply with the chronic low-dose rate exposure in the Chernobyl and Fukushima Exclusion Zones. This stands in stark contrast to the chronic, low-dose rate contamination that defines the Chernobyl and Fukushima Exclusion Zones. While the long-term ecological effects of the latter are well-documented, a systematic synthesis of the floral response to the atomic bombings is lacking. This review integrates historical data with modern radio-ecological principles to analyze plant survival and succession. We document the remarkable recovery of vegetation, from the resprouting …
Exploring Csf Microrna Signatures As Diagnostic Biomarkers In Adult-Type Diffuse Gliomas, Maryam Pirhoushiaran, Kamilah Walker-Charles, Tsung-Hung Yao, Satwikreddy Putluri, Nehal Patel, Daniel H Wang, Isabel Wang, Srividya Arjuna, Antonio Dono, Angel Bueno, Sophia Nguyen, Ashish P Balar, Jason T Huse, Suprateek Kundu, Yoshua Esquenazi, Chirag B Patel, Sujit S Prabhu, Frederick F Lang, Leomar Y Ballester
Exploring Csf Microrna Signatures As Diagnostic Biomarkers In Adult-Type Diffuse Gliomas, Maryam Pirhoushiaran, Kamilah Walker-Charles, Tsung-Hung Yao, Satwikreddy Putluri, Nehal Patel, Daniel H Wang, Isabel Wang, Srividya Arjuna, Antonio Dono, Angel Bueno, Sophia Nguyen, Ashish P Balar, Jason T Huse, Suprateek Kundu, Yoshua Esquenazi, Chirag B Patel, Sujit S Prabhu, Frederick F Lang, Leomar Y Ballester
Faculty, Staff and Student Publications
Mutations in isocitrate dehydrogenase (IDH) genes, specifically IDH1 and IDH2, are frequently observed in diffuse gliomas (DG) and define distinct molecular subtypes, namely IDH-wildtype and IDH-mutant. Abnormal expression of extracellular vesicle-derived microRNAs (EV-miRNAs) in the cerebrospinal fluid (CSF) of DG patients may serve as minimally invasive diagnostic and prognostic biomarkers. To investigate this potential, we employed miRNA-sequencing (miRNA-seq), quantitative real-time PCR (qRT-PCR), and multivariable logistic regression (MLR) to identify differentially expressed microRNAs (DE-miRNAs) in CSF samples from DG patients. qRT-PCR analysis demonstrated that EV-miR-21-5p effectively differentiated CSF from glioblastoma (GBM) patients versus controls (p = 0.012, AUC = 0.84) and …
Nlrp3 Inflammasome: A Link Between Systemic Infection And Alzheimer’S Disease, Tatiana Barichello, Felipe Dal-Pizzol
Nlrp3 Inflammasome: A Link Between Systemic Infection And Alzheimer’S Disease, Tatiana Barichello, Felipe Dal-Pizzol
Faculty, Staff and Student Publications
No abstract provided.
Exploring Csf Microrna Signatures As Diagnostic Biomarkers In Adult-Type Diffuse Gliomas, Maryam Pirhoushiaran, Kamilah Walker-Charles, Tsung-Hung Yao, Satwikreddy Putluri, Nehal Patel, Daniel H Wang, Isabel Wang, Srividya Arjuna, Antonio Dono, Angel Bueno, Sophia Nguyen, Ashish P Balar, Jason T Huse, Suprateek Kundu, Yoshua Esquenazi, Chirag B Patel, Sujit S Prabhu, Frederick F Lang, Leomar Y Ballester
Exploring Csf Microrna Signatures As Diagnostic Biomarkers In Adult-Type Diffuse Gliomas, Maryam Pirhoushiaran, Kamilah Walker-Charles, Tsung-Hung Yao, Satwikreddy Putluri, Nehal Patel, Daniel H Wang, Isabel Wang, Srividya Arjuna, Antonio Dono, Angel Bueno, Sophia Nguyen, Ashish P Balar, Jason T Huse, Suprateek Kundu, Yoshua Esquenazi, Chirag B Patel, Sujit S Prabhu, Frederick F Lang, Leomar Y Ballester
Faculty, Staff and Student Publications
Mutations in isocitrate dehydrogenase (IDH) genes, specifically IDH1 and IDH2, are frequently observed in diffuse gliomas (DG) and define distinct molecular subtypes, namely IDH-wildtype and IDH-mutant. Abnormal expression of extracellular vesicle-derived microRNAs (EV-miRNAs) in the cerebrospinal fluid (CSF) of DG patients may serve as minimally invasive diagnostic and prognostic biomarkers. To investigate this potential, we employed miRNA-sequencing (miRNA-seq), quantitative real-time PCR (qRT-PCR), and multivariable logistic regression (MLR) to identify differentially expressed microRNAs (DE-miRNAs) in CSF samples from DG patients. qRT-PCR analysis demonstrated that EV-miR-21-5p effectively differentiated CSF from glioblastoma (GBM) patients versus controls (p = 0.012, AUC = 0.84) and …
Ldm-Morph: Latent Diffusion Model Guided Deformable Image Registration, Jiong Wu, Tinsu Pan, Kuang Gong
Ldm-Morph: Latent Diffusion Model Guided Deformable Image Registration, Jiong Wu, Tinsu Pan, Kuang Gong
Faculty, Staff and Student Publications
Deformable image registration plays an essential role in various medical image tasks. Existing deep learning-based deformable registration frameworks primarily utilize convolutional neural networks (CNNs) or Transformers to learn features to predict the deformations. However, the lack of semantic information in the learned features limits the registration performance. Furthermore, the similarity metric of the loss function is often evaluated only in the pixel space, which ignores the matching of high-level anatomical features and can lead to deformation folding. To address these issues, in this work, we proposed LDM-Morph, an unsupervised deformable registration algorithm for medical image registration. LDM-Morph integrated features extracted …
Kolonialisme Iklim Dan Tercerabutnya Pengetahuan Ekologi Tradisional: Sosio-Bioekonomi Sebagai Reorientasi Epistemologis, Viky Arthiando Putra
Kolonialisme Iklim Dan Tercerabutnya Pengetahuan Ekologi Tradisional: Sosio-Bioekonomi Sebagai Reorientasi Epistemologis, Viky Arthiando Putra
Antropologi Indonesia
Abstract The global climate change has brought with it a growing stack of conceptual proposals – from green economy to bioeconomy – each presenting itself as a non-extractive economic alternative. Unfortunately, these conceptual claims continue to reproduce colonial logic that subordinates local knowledge. The loss of Traditional Ecological Knowledge (TEK) is not merely an ecological setback: it is a systematic epistemological violence – a product of climate colonialism operating within the architecture of global green programs. This article traces the discourse of green economy, analyzes the loss of TEK as an epistemological problem, and proposes a socio-bioeconomy reorientation as a …
Hydroxamate Formation In The Lipopeptide Containing Siderophore Taiwachelin, Aaron J. Gringer, Kernen P. Agwaza, Isabel Da Fonseca, Pablo Sobrado
Hydroxamate Formation In The Lipopeptide Containing Siderophore Taiwachelin, Aaron J. Gringer, Kernen P. Agwaza, Isabel Da Fonseca, Pablo Sobrado
Chemistry Faculty Research & Creative Works
Cupriavidus taiwanensis is a nitrogen-fixing bacterium found in root nodules of the invasive tropical weed Mimosa pudica . C. taiwanensis has been shown to grow in environments contaminated with heavy metals such as Pb, Cu, and Cd. Taiwachelin, a recently identified siderophore produced by C. taiwanensis , is an iron chelator that contains a hydroxamate functional group for metal binding. In its biosynthesis, a flavin-dependent N-monooxygenase (NMO) was predicted to hydroxylate l -ornithine, leading to formation of the metal binding hydroxamate moiety. Here, we report the cloning, expression, and biochemical characterization of this enzyme, herein referred to as CtNMO. CtNMO …
Routine Transfusion Of Rh(D)-Positive Rbcs To Rh(D)-Negative Patients Designated As Do Not Resuscitate Conserves Rh(D)-Negative Red Blood Cell Inventory, Julie Katz Karp, Jovanna Everetts, Juliana Guarente, Angelica Vivero, Tiffany Bohr, Mary Harach
Routine Transfusion Of Rh(D)-Positive Rbcs To Rh(D)-Negative Patients Designated As Do Not Resuscitate Conserves Rh(D)-Negative Red Blood Cell Inventory, Julie Katz Karp, Jovanna Everetts, Juliana Guarente, Angelica Vivero, Tiffany Bohr, Mary Harach
Department of Pathology, Anatomy, and Cell Biology Faculty Papers
Background: A minority of blood donors are Rh(D)-negative, and Rh(D)-negative red blood cell (RBC) products are often overutilized. As such, Rh(D)-negative RBCs may be difficult to maintain in blood bank inventory.
Study design and methods: We changed our blood bank laboratory policy to approve non-alloimmunized Rh(D)-negative patients to receive Rh(D)-positive RBCs for routine transfusion under defined criteria. Those criteria included Rh(D)-negative males (all ages) and females (aged >50 years) who were designated as do not resuscitate (DNR), either with or without intubation, in the electronic medical record.
Results: From August 15, 2024 through August 15, 2025, a total of 204 …
Viruses Causing Panleukopenia In Domestic Cats: A Review Of Feline And Canine Parvoviruses, Simon Colby
Viruses Causing Panleukopenia In Domestic Cats: A Review Of Feline And Canine Parvoviruses, Simon Colby
University Honors Theses
Parvoviruses remain among the most important viral pathogens in domestic cats today. Despite this, there is much confusion around which parvoviruses can infect cats, and what extent of disease they can cause. One of the two parvoviruses infecting cats, canine parvovirus type-2 (CPV-2), likely evolved from the other parvovirus infecting cats, feline parvovirus (FPV). These viruses differ at only a few places in their genomes, and share the method of cell entry via the transferrin receptor. The disease caused by FPV has been well characterized in cats, but disease caused by CPV-2 is more obscure. Additionally, current testing methods for …
Developing A High-Resolution Off-Axis Common-Mode Digital Holographic Microscope, Lucy Cook
Developing A High-Resolution Off-Axis Common-Mode Digital Holographic Microscope, Lucy Cook
University Honors Theses
Off-axis digital holographic microscopy (DHM) is a powerful tool for 3D, non-invasive live-cell tracking without moving parts. However, traditional setups face an inherent dilemma: split-path interferometers offer high spatial resolution but poor temporal stability, while more stable common-mode configurations are historically limited to lower numerical aperture (NA) regimes. This thesis bridges that gap by scaling a common-mode DHM architecture into a high-resolution benchtop instrument featuring NA = 0.65 objectives, paired with a high-power 520 nm laser source to combat transmission losses and sustain imaging frame rates across an expanded optical footprint. We map the multi-variable design space required to satisfy …
Shallow-Marine Crinoid Genera May Have Been More Resilient Across Permian Extinction Events In Terms Of Richness Than Deep-Marine Crinoid Genera, Amelia C. Kolstad
Shallow-Marine Crinoid Genera May Have Been More Resilient Across Permian Extinction Events In Terms Of Richness Than Deep-Marine Crinoid Genera, Amelia C. Kolstad
University Honors Theses
Throughout the Phanerozoic, one of the most successful phyla of marine invertebrates has been Echinodermata. Echinodermata was particularly successful throughout the Paleozoic, with class Crinoidea making up a majority of occurrences. The proportion of echinoderm occurrences that are crinoids declined massively at the end of the Permian and continued to decrease into modern day, never fully recovering. One of the factors thought to have been so important for crinoid success in the Paleozoic and their decreasing success throughout geologic time has been their propensity for success in shallow-marine environments, though crinoids also exist within deep-marine environments. This study seeks to …
Is Trimethylamine N-Oxide A Friend, Foe, Or Hormetic Agent In Patients With Parkinson’S Disease: A Focused Review Of One Microbial Metabolite, Abraham B. Alton
Is Trimethylamine N-Oxide A Friend, Foe, Or Hormetic Agent In Patients With Parkinson’S Disease: A Focused Review Of One Microbial Metabolite, Abraham B. Alton
Student Works
This review synthesizes recent literature examining trimethylamine N-oxide (TMAO) synthesis and its potential role in Parkinson’s Disease (PD) pathology. An increase in TMAO plasma and CSF concentration is associated with PD progression and severity. TMAO biosynthesis is a two-step process. First, precursors including carnitine and choline are converted to trimethylamine (TMA) by gut microbes. Second, TMAO is oxidized to TMAO in the liver. Once absorbed into circulation TMAO crosses the blood brain barrier and may influence PD disease pathology by increasing neuroinflammation and astrocyte activation and damaging the cerebral lymphatic system. These mechanisms may contribute to the cognitive and motor …
Dr. Jonathan Velotta Faculty Spotlight, Katelyn Trimble
Dr. Jonathan Velotta Faculty Spotlight, Katelyn Trimble
DU Undergraduate Research Journal Archive
An interview with Dr. Jonathan Velotta of the University of Denver's Department of Biological Sciences.
Structure Of Ergosteryl-Aspartate Synthase Reveals How An Entrapped Trna Is Used Like A Prosthetic Swinging Arm In The Synthesis Of Aminoacylated Sterols, Hanako Murayama, Nathaniel Yakobov, Nassira Mahmoudi, Sasha Legrosdidier, Nicolas Fournier, Solène Zuttion, Kanata Matsumoto, Michihiro Nishimura, Jingwei Ji, Bruno Senger, Laurence Huck, Howard Gamper, Yoshiaki Kise, Ralph Kleiner, Mathieu Frechin, Ya-Ming Hou, Hubert Becker, Yuzuru Itoh, Frédéric Fischer, Osamu Nureki
Structure Of Ergosteryl-Aspartate Synthase Reveals How An Entrapped Trna Is Used Like A Prosthetic Swinging Arm In The Synthesis Of Aminoacylated Sterols, Hanako Murayama, Nathaniel Yakobov, Nassira Mahmoudi, Sasha Legrosdidier, Nicolas Fournier, Solène Zuttion, Kanata Matsumoto, Michihiro Nishimura, Jingwei Ji, Bruno Senger, Laurence Huck, Howard Gamper, Yoshiaki Kise, Ralph Kleiner, Mathieu Frechin, Ya-Ming Hou, Hubert Becker, Yuzuru Itoh, Frédéric Fischer, Osamu Nureki
Department of Biochemistry and Molecular Biology Faculty Papers
Ergosteryl-3β-O-L-aspartate synthase (ErdS) catalyzes tRNA-dependent aspartylation of ergosterol, a lipid essential for fungal cell membrane integrity. However, the functional significance of ergosteryl-aspartate and the molecular mechanisms underlying its synthesis remain unclear. Here, we show that ErdS localization is highly dynamic and that Erg-Asp is required for proper hyphal growth, sporulation, and spore germination, and likely influences stress tolerance. The cryo-electron microscopy structure of ErdS revealed an unprecedented sterol-binding pocket. In addition, the structures in complex with a non-hydrolyzable Asp-N-tRNAAsp show a tRNA-guided intramolecular aminoacyl transfer mechanism between two functional domains of the enzyme. The CCA end of tRNAAsp undergoes a …
Seaweed-Derived Bioactives: A Promising Source Of Novel Therapeutics, Aida H. Shobier, Sahar W.M. Hassan, Safaa A. Abdel Ghani
Seaweed-Derived Bioactives: A Promising Source Of Novel Therapeutics, Aida H. Shobier, Sahar W.M. Hassan, Safaa A. Abdel Ghani
Blue Economy
The marine environment provides bioactive natural products with unique structures that are absent in terrestrial compounds. This review aims to provide a thorough overview of key studies on bioactives derived from seaweeds. It focuses on their potential to address common diseases such as microbial infections, diabetes, oxidative stress, inflammation, viral infections, cancer, immune disorders, and Alzheimer's disease as well as their potential use in drug delivery systems. The bioactive compounds found in seaweeds belong to various chemical classes, with the largest proportion being polysaccharides, lipids, proteins, phenolics, pigments, terpenoids, alkaloids, and sterols. These compounds possess significant pharmacological potential. …
Mitochondria-Er Contact Sites (Mercs) In The Cell Cycle: Molecular Architecture And Functional Remodeling Across Cellular States, Eduardo Silva-Pavez, Bruno Torres-Gonzalez, Michelle Sotomayor, Benjamín Cartes-Saavedra, Dorian V. Ziegler, Yessia Hidalgo-Fadic, Ulises Ahumada-Castro
Mitochondria-Er Contact Sites (Mercs) In The Cell Cycle: Molecular Architecture And Functional Remodeling Across Cellular States, Eduardo Silva-Pavez, Bruno Torres-Gonzalez, Michelle Sotomayor, Benjamín Cartes-Saavedra, Dorian V. Ziegler, Yessia Hidalgo-Fadic, Ulises Ahumada-Castro
Department of Pathology, Anatomy, and Cell Biology Faculty Papers
Mitochondria–endoplasmic reticulum (ER) contact sites (MERCS) are nanoscopic, dynamic platforms integrating metabolism, signaling, and stress responses to regulate cell fate. These nanoscopic interfaces remodel continuously to meet the demands of proliferating, quiescent, and senescent cells. We synthesize evidence that MERCS actively coordinate local Ca2+ signaling, non-vesicular lipid transfer, and proteostasis to shape mitochondrial function and cellular homeostasis. We discuss how MERCS architecture changes across the cell cycle and during arrest, distinguishing adaptive from maladaptive remodeling, and consider therapeutic potential in aging and age-related disease.
Early Life Exposure To Antibiotics Increases The Risk Of Myopia: A Retrospective Cohort Study, Peng-Tai Tien, Chang-Ching Wei, Sheng-Chun Lin, Ping Ping Meng, Yu-Te Huang, Jamie Jiin-Yi Chen, Ming-Yen Wu, Ying-Hsiu Shih, Tzu-Ju Hsu, Fuu-Jen Tsai, Yao-Chien Wang, Hui-Ju Lin, Lei Wan
Early Life Exposure To Antibiotics Increases The Risk Of Myopia: A Retrospective Cohort Study, Peng-Tai Tien, Chang-Ching Wei, Sheng-Chun Lin, Ping Ping Meng, Yu-Te Huang, Jamie Jiin-Yi Chen, Ming-Yen Wu, Ying-Hsiu Shih, Tzu-Ju Hsu, Fuu-Jen Tsai, Yao-Chien Wang, Hui-Ju Lin, Lei Wan
BioMedicine
Background
Myopia is a growing health issue, expected to affect nearly half of the global population by 2050. Genetic predisposition and early environmental influences both play crucial roles in the development of myopia. Identifying modifiable risks and early interventions is critical. Antibiotics, commonly given to young children, may disrupt gut microbiota, which has been linked to ocular diseases in humans and animals.
Aim We aimed to investigate the association between antibiotic use in early life and the risk of developing myopia.
Methods Retrospective cohort study using data from a national health insurance database examined children aged three years or younger, …