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Articles 1 - 30 of 130
Full-Text Articles in Medicine and Health Sciences
Atomistic Simulations And Network-Based Modeling Of The Hsp90-Cdc37 Chaperone Binding With Cdk4 Client Protein: A Mechanism Of Chaperoning Kinase Clients By Exploiting Weak Spots Of Intrinsically Dynamic Kinase Domains, John Czemeres, Kurt Buse, Gennady M. Verkhivker
Atomistic Simulations And Network-Based Modeling Of The Hsp90-Cdc37 Chaperone Binding With Cdk4 Client Protein: A Mechanism Of Chaperoning Kinase Clients By Exploiting Weak Spots Of Intrinsically Dynamic Kinase Domains, John Czemeres, Kurt Buse, Gennady M. Verkhivker
Mathematics, Physics, and Computer Science Faculty Articles and Research
A fundamental role of the Hsp90 and Cdc37 chaperones in mediating conformational development and activation of diverse protein kinase clients is essential in signal transduction. There has been increasing evidence that the Hsp90-Cdc37 system executes its chaperoning duties by recognizing conformational instability of kinase clients and modulating their folding landscapes. The recent cryo-electron microscopy structure of the Hsp90-Cdc37- Cdk4 kinase complex has provided a framework for dissecting regulatory principles underlying differentiation and recruitment of protein kinase clients to the chaperone machinery. In this work, we have combined atomistic simulations with protein stability and network-based rigidity decomposition analyses to characterize dynamic …
Inhibitory Or Excitatory? Optogenetic Interrogation Of The Functional Roles Of Gabaergic Interneurons In Epileptogenesis, Hui Ye
Biology: Faculty Publications and Other Works
Alteration in the excitatory/inhibitory neuronal balance is believed to be the underlying mechanism of epileptogenesis. Based on this theory, GABAergic interneurons are regarded as the primary inhibitory neurons, whose failure of action permits hyperactivity in the epileptic circuitry. As a consequence, optogenetic excitation of GABAergic interneurons is widely used for seizure suppression. However, recent evidence argues for the context-dependent, possibly “excitatory” roles that GABAergic cells play in epileptic circuitry. We reviewed current optogenetic approaches that target the “inhibitory” roles of GABAergic interneurons for seizure control. We also reviewed interesting evidence that supports the “excitatory” roles of GABAergic interneurons in epileptogenesis. …
Comparing The Effectiveness Of Alternative And Prescription Antibiotics Against Gram-Positive Bacteria, Rachel Jenkins, Roan Dickenson, Sam Turnbull, Marcela Torres
Comparing The Effectiveness Of Alternative And Prescription Antibiotics Against Gram-Positive Bacteria, Rachel Jenkins, Roan Dickenson, Sam Turnbull, Marcela Torres
Senior Theses
The rapid emergence of antibiotic-resistant bacteria is a global public health concern that threatens the efficacy of antibiotic drugs. We found that natural remedies, specifically coconut oil, honey and cinnamon essential oil, have the potential to be used as a clinical alternative to treat antibiotic-resistant infections. In this experiment, we performed a disk diffusion test and measured the area of inhibition of each treatment to compare the effectiveness of natural and prescription antibiotics. Cinnamon essential oil showed significantly greater antibiotic activity compared to a prescription treatment, amoxicillin. With bacterial resistance continuously expanding, more work needs to be done to determine …
24-Month Hiv-Free Survival Among Infants Born To Hiv-Positive Women Enrolled In Option B+ Program In Kigali, Rwanda: The Kabeho Study, Michelle Gill, Heather J. Hoffman, Dieudonne Ndatimana, Placidie Mugwaneza, Laura Guay, +Several Additional Authors
24-Month Hiv-Free Survival Among Infants Born To Hiv-Positive Women Enrolled In Option B+ Program In Kigali, Rwanda: The Kabeho Study, Michelle Gill, Heather J. Hoffman, Dieudonne Ndatimana, Placidie Mugwaneza, Laura Guay, +Several Additional Authors
Genomics and Precision Medicine Faculty Publications
Lifelong antiretroviral therapy (ART) provision to all pregnant HIV-positive women (“Option B+”) has been recommended by the World Health Organization since 2013, but there remain limited data on the effects of Option B+ on long-term HIV-free survival in breastfeeding HIV-exposed infants. The Kigali Antiretroviral and Breastfeeding Assessment for the Elimination of HIV (Kabeho) study enrolled HIV-positive women from the third trimester of pregnancy to 2 weeks postpartum in 14 heath facilities implementing Option B+ in Kigali, Rwanda. Mother–child pairs in the longitudinal observational cohort were followed until 24 months postpartum, with HIV diagnostic testing at 6 weeks, and 9, 18 …
Insights Into The Therapeutic Potential Of Salt Inducible Kinase 1: A Novel Mechanism Of Metabolic Control, Randi Fitzgibbon
Insights Into The Therapeutic Potential Of Salt Inducible Kinase 1: A Novel Mechanism Of Metabolic Control, Randi Fitzgibbon
Dissertations & Theses (Open Access)
Salt inducible kinase 1 (SIK1) has been considered a stress-inducible kinase since it was first cloned in 1999. Continued efforts since this time have been dedicated to characterizing the structure and function of SIK1. Such research has laid the ground work for our understanding of SIK1 action and regulation in tissue and stimuli dependent manners. The fundamental findings of this dissertation continue in this tradition and include investigations of SIK1 regulatory mechanisms in skeletal muscle cells, the cellular and physiological effects of SIK1 loss of function in vitro and in vivo, and intracellular metabolic and mitochondrial regulation by this …
Gastrin Induces Nuclear Export And Proteasomal Degradation Of Menin In Enteric Glial Cells, Sinju Sundaresan, Cameron A. Meininger, Anthony J. Kang, Amanda L. Photenhauer, Michael M. Hayes, Nirakar Sahoo, Jolanda Lindenberg, Jolanta Grembecka, Tomasz Cierpicki, Lin Ding
Gastrin Induces Nuclear Export And Proteasomal Degradation Of Menin In Enteric Glial Cells, Sinju Sundaresan, Cameron A. Meininger, Anthony J. Kang, Amanda L. Photenhauer, Michael M. Hayes, Nirakar Sahoo, Jolanda Lindenberg, Jolanta Grembecka, Tomasz Cierpicki, Lin Ding
Biology Faculty Publications and Presentations
Background & aims: The multiple endocrine neoplasia, type 1 (MEN1) locus encodes the nuclear protein and tumor suppressor menin. MEN1 mutations frequently cause neuroendocrine tumors such as gastrinomas, characterized by their predominant duodenal location and local metastasis at time of diagnosis. Diffuse gastrin cell hyperplasia precedes the appearance of MEN1 gastrinomas, which develop within submucosal Brunner's glands. We investigated how menin regulates expression of the gastrin gene and induces generation of submucosal gastrin-expressing cell hyperplasia.
Methods: Primary enteric glial cultures were generated from the VillinCre:Men1FL/FL:Sst-/- mice or C57BL/6 mice (controls), with or without inhibition of gastric acid by omeprazole. Primary …
Behavioral Ecology And Associated Virology Of Mosquito-Host Interactions In Southern California, Oliver Eshun
Behavioral Ecology And Associated Virology Of Mosquito-Host Interactions In Southern California, Oliver Eshun
Loma Linda University Electronic Theses, Dissertations & Projects
Elucidating characteristics of mosquito-host interactions are critical for understanding the ecology and epidemiology of mosquito-borne diseases. In this dissertation, I conducted three studies to explore potential mosquito-host interactions and associated virus infection rates. I first demonstrated that mosquito captures at CO2-baited traps decreased most markedly with height above ground, and also decreased with distance from water at a riparian area but not at an open water source lacking a vegetated border. Birds might therefore prefer elevated nests or roosts to avoid mosquitoes. The second study examined the anti-mosquito behaviors of budgerigars (Melopsittacus undulatus) in a laboratory study. The birds defended …
Exploiting Fission Yeast Genetic Interaction Data To Identify Disease-Specific Drug Targets For Tuberous Sclerosis Complex, Ashyad Rayhan
Exploiting Fission Yeast Genetic Interaction Data To Identify Disease-Specific Drug Targets For Tuberous Sclerosis Complex, Ashyad Rayhan
Electronic Thesis and Dissertation Repository
Tuberous sclerosis complex (TSC) is an inherited genetic disorder caused by loss-of-function mutations in either TSC1 or TSC2. Their respective gene products regulate the mechanistic target of rapamycin (mTOR) signaling pathway, which serves as an activator of cellular proliferation, metabolism, and cell survival. Orthologs of the TSC1 and TSC2 genes exist in a wide range of organisms, including the commonly used and genetically tractable model eukaryote, Schizosaccharomyces pombe. To better understand the functional roles of S. pombe tsc1 and tsc2, I exploited recent advances in genetic interaction biology to identify and characterize genes that modulate the phenotypic …
Emergence Of The L Phenotype In Group B Streptococci In The South Of Ireland, Katherine Hayes, Lesley Cotter, L. Barry, Fiona O'Halloran
Emergence Of The L Phenotype In Group B Streptococci In The South Of Ireland, Katherine Hayes, Lesley Cotter, L. Barry, Fiona O'Halloran
Department of Biological Sciences Publications
Group B Streptococcal isolates (n = 235) from the South of Ireland were characterised by serotyping, antimicrobial susceptibility and determination of the phenotypic and genotypic mechanisms of resistance. Resistance to erythromycin and clindamycin was observed in 21·3% and 20·4% of the total population, respectively. The c-MLSB phenotype was the most common phenotype detected (62%), with ermB being the predominant genetic determinant, present in 84% of resistant isolates. The rare L phenotype was observed in 2·9% (n = 7) of isolates, four of which harboured the lsaC gene responsible for clindamycin resistance. Serotypes Ia, III and II were the most common …
Investigating The Toxicity And Accumulation Of 2,4-Dichlorophenoxyacetic Acid (2,4-D) And Glyphosate In Eisenia Fetida, Caitlin Lazurick, Nicole Lidzbarski, Rachel Owings, Jeff Brotherton, Edna Steele
Investigating The Toxicity And Accumulation Of 2,4-Dichlorophenoxyacetic Acid (2,4-D) And Glyphosate In Eisenia Fetida, Caitlin Lazurick, Nicole Lidzbarski, Rachel Owings, Jeff Brotherton, Edna Steele
Journal of the South Carolina Academy of Science
Glyphosate, the main ingredient in Roundup®, is the most widely used herbicide in the world. It is also used in combination with another effective herbicide, 2,4-D, in the formulation called Enlist Duo®. The EPA approved the use of Enlist Duo® on certain crops including those genetically modified to be resistant to both herbicides. The predicted significant increase in the use of these herbicides raised concerns from the general public because both compounds have been classified as possibly or probably carcinogenic. Since herbicides are applied directly to vegetation, the safety of organisms that come in contact …
Investigation Of Moringa Oleifera Leaf Extract And Its Cancer-Selective Antiproliferative Properties, Reagen H. Welch, Ashlee H. Tietje
Investigation Of Moringa Oleifera Leaf Extract And Its Cancer-Selective Antiproliferative Properties, Reagen H. Welch, Ashlee H. Tietje
Journal of the South Carolina Academy of Science
Moringa oleifera is a tree native to a number of Asian, African, and Central American countries and has been used in traditional medicine for an assortment of medicinal uses for centuries. Due to bioactive compounds within Moringa leaves, it is believed that Moringa leaf extract may possess cancer-selective antiproliferative properties. Previous research has been conducted in regards to this topic, but poor experimental design due to lack of necessary controls limits the legitimacy of anticancer claims. While previous research has shown that Moringa leaf extract has the potential to kill cancer cells, the research fails to demonstrate the effects of …
Differences In Pragmatic Language Measures In Mothers Of Children With Autism Or Fragile X Syndrome, Michelle Huang
Differences In Pragmatic Language Measures In Mothers Of Children With Autism Or Fragile X Syndrome, Michelle Huang
Journal of the South Carolina Academy of Science
Mastery of pragmatics, which refers to the language used in different social interactions, is key to effective communication in daily life. However, studies have found that mothers of children with an autism spectrum disorder (ASD) or Fragile X Syndrome (FXS) are at an increased risk for impaired pragmatic language skills. Though many measures of pragmatic language exist for children, very few are available for these mothers. Two commonly used measures for the mothers include the Pragmatic Rating Scale (PRS) and the Pragmatic Language Subscale of the Broad Autism Phenotype Questionnaire (BAPQ). This study, unlike previous ones that only look at …
Table Of Contents
Journal of the South Carolina Academy of Science
No abstract provided.
The Effects Of Sports Related Head Impact On Balance And Neurocognitive Functions, Shaquanda D. Ross-Simmons, Michelle L. Vieyra, Abhishek Jain, Keri Weed
The Effects Of Sports Related Head Impact On Balance And Neurocognitive Functions, Shaquanda D. Ross-Simmons, Michelle L. Vieyra, Abhishek Jain, Keri Weed
Journal of the South Carolina Academy of Science
The goal of this study was to investigate the effects of sports-related head injury on balance, attention, and memory. Reliable differences have been found using measures that directly tap into brain functioning, such as the auditory oddball task combined with EEG recording. We hypothesized that athletes reporting a diagnosed concussion or participation in high-risk sports would have compromised balance and neurocognitive functioning compared to athletes in low risk sports. Forty-five undergraduate participants were identified as either concussed, non-concussed in high-risk sports, or non-concussed in low-risk sports using a survey of athletic history, head trauma and demographics. The Biopac MP36 system, …
Optimizing Sperm Collection Procedures In Zebrafish, Madelyn B. Wasden, Rachel L. Roberts, April Delaurier
Optimizing Sperm Collection Procedures In Zebrafish, Madelyn B. Wasden, Rachel L. Roberts, April Delaurier
Journal of the South Carolina Academy of Science
Zebrafish are a highly-valued model organism used for developmental biology research. Zebrafish can be used for genetic manipulation and hence, many mutant and transgenic lines exist. It is impractical to maintain lines of adult zebrafish, due to resource constraints and the need to continuously produce new generations. Therefore, a practical way to preserve zebrafish lines is to freeze sperm and retrieve lines using in vitro fertilization of fresh eggs. Most existing in vitro protocols used by research labs have a wide variety of fertilization rates (ranging from 0% to >90%). Due to this variability, lines may be at risk of …
Nlrp10 Enhances Cd4+ T-Cell-Mediated Ifnγ Response Via Regulation Of Dendritic Cell-Derived Il-12 Release, Maurizio Vacca, Julia Böhme, Lisa Zambetti, Hanif Javanmard Khameneh, Bhairav S. Paleja, Federica Laudisi, Adrian W. S. Ho, Kurt Neo, Keith Weng Kit Leong, Mardiana Marzuki, Bernett Lee, Michael Poidinger, Laura Santambrogio, Liana Tsenova, Francesca Zolezzi, Gennaro De Libero, Amit Singhal, Alessandra Mortellaro
Nlrp10 Enhances Cd4+ T-Cell-Mediated Ifnγ Response Via Regulation Of Dendritic Cell-Derived Il-12 Release, Maurizio Vacca, Julia Böhme, Lisa Zambetti, Hanif Javanmard Khameneh, Bhairav S. Paleja, Federica Laudisi, Adrian W. S. Ho, Kurt Neo, Keith Weng Kit Leong, Mardiana Marzuki, Bernett Lee, Michael Poidinger, Laura Santambrogio, Liana Tsenova, Francesca Zolezzi, Gennaro De Libero, Amit Singhal, Alessandra Mortellaro
Publications and Research
NLRP10 is a nucleotide-binding oligomerization domain-like receptor that functions as an intracellular pattern recognition receptor for microbial products. Here, we generated a Nlrp10−/− mouse to delineate the role of NLRP10 in the host immune response and found that Nlrp10−/− dendritic cells (DCs) elicited sub-optimal IFNγ production by antigenspecific CD4+ T cells compared to wild-type (WT) DCs. In response to T-cell encounter, CD40 ligation or Toll-like receptor 9 stimulation, Nlrp10−/− DCs produced low levels of IL-12, due to a substantial decrease in NF-κB activation. Defective IL-12 production was also evident in vivo and affected IFNγ production by CD4+ T cells. Upon …
Co-Independent Modification Of K+ Channels By Tricarbonyldichlororuthenium(Ii) Dimer (Corm-2), Guido Gessner, Nirakar Sahoo, Sandip M. Swain, Gianna Hirth, Roland Schönherr, Ralf Mede, Matthias Westerhausen, Hans Henning Brewitz, Pascal Heimer, Diana Imhof
Co-Independent Modification Of K+ Channels By Tricarbonyldichlororuthenium(Ii) Dimer (Corm-2), Guido Gessner, Nirakar Sahoo, Sandip M. Swain, Gianna Hirth, Roland Schönherr, Ralf Mede, Matthias Westerhausen, Hans Henning Brewitz, Pascal Heimer, Diana Imhof
Biology Faculty Publications and Presentations
Although toxic when inhaled in high concentrations, the gas carbon monoxide (CO) is endogenously produced in mammals, and various beneficial effects are reported. For potential medicinal applications and studying the molecular processes underlying the pharmacological action of CO, so-called CO-releasing molecules (CORMs), such as tricabonyldichlororuthenium(II) dimer (CORM-2), have been developed and widely used. Yet, it is not readily discriminated whether an observed effect of a CORM is caused by the released CO gas, the CORM itself, or any of its intermediate or final breakdown products. Focusing on Ca2+- and voltage-dependent K+ channels (KCa1.1) and voltage-gated K+ channels (Kv1.5, Kv11.1) relevant …
Beginning Experiment: Nanoparticle Uptake In Arpe-19 Cells, Nitya Nunna
Beginning Experiment: Nanoparticle Uptake In Arpe-19 Cells, Nitya Nunna
Trick to the Treat of Internships and Research
No abstract provided.
Cleveland Clinic Summer Scholars Program, Chethani Chitraacharige
Cleveland Clinic Summer Scholars Program, Chethani Chitraacharige
Trick to the Treat of Internships and Research
No abstract provided.
Practicum In Biology, Sarah Amaris
Practicum In Biology, Sarah Amaris
Trick to the Treat of Internships and Research
No abstract provided.
Cano Health Clinical Studies Internship Program, Stephanie Hernandez
Cano Health Clinical Studies Internship Program, Stephanie Hernandez
Trick to the Treat of Internships and Research
No abstract provided.
The Austria Summer Biology Internship, Max Cedeno-Hahn, Laura Enzinna
The Austria Summer Biology Internship, Max Cedeno-Hahn, Laura Enzinna
Trick to the Treat of Internships and Research
No abstract provided.
Rumbaugh Goodwin Institute Of Cancer Research, Christopher Garcia
Rumbaugh Goodwin Institute Of Cancer Research, Christopher Garcia
Trick to the Treat of Internships and Research
No abstract provided.
The International Human Cadaver Prosection Program, Wilford Miranda, Christopher Garcia
The International Human Cadaver Prosection Program, Wilford Miranda, Christopher Garcia
Trick to the Treat of Internships and Research
No abstract provided.
Science Alive, Allan Barraza, Ahjay Bhatia, Gwen Bui, Sophia Nguyen
Science Alive, Allan Barraza, Ahjay Bhatia, Gwen Bui, Sophia Nguyen
Trick to the Treat of Internships and Research
No abstract provided.
Is Tb Testing Associated With Increased Blood Interferon-Gamma Levels?, Aideen E. Kennedy, Jim O'Mahony, Noel Byrne, John Macsharry, Riona G. Sayers
Is Tb Testing Associated With Increased Blood Interferon-Gamma Levels?, Aideen E. Kennedy, Jim O'Mahony, Noel Byrne, John Macsharry, Riona G. Sayers
Department of Biological Sciences Publications
The Republic of Ireland reports a relatively low prevalence of Johne’s disease (JD) compared to international counterparts. Postulated reasons for this include a lower average herd size and a grass-based production system. Ireland also engages in high levels of bovine tuberculosis (bTB) testing. As interferon-gamma (IFN-γ) is believed to play a key role in protecting against JD, it is our hypothesis that administration of purified protein derivative (PPD), as part of the bTB test, is associated with a systemic increase in IFN-γ production, which may potentially limit clinical progression of the disease. We studied 265 cows (202 Friesian and 63 …
Water Supply In Developing Countries: Student Experiences In The Dominican Republic, Albert Alwang, Margaret Busse, Audrey Caprio, Marieke Fenton, Jason Hawes, Andrew Kanach, Autumn Mcelfresh-Sutton
Water Supply In Developing Countries: Student Experiences In The Dominican Republic, Albert Alwang, Margaret Busse, Audrey Caprio, Marieke Fenton, Jason Hawes, Andrew Kanach, Autumn Mcelfresh-Sutton
Purdue Journal of Service-Learning and International Engagement
In 2010, the United Nations established access to safe drinking water as a basic human right; however, many areas around the globe still lack access. The interdisciplinary service-learning course “Water Supply in Developing Countries” was established at Purdue in 2012 to address the complex issue of water insecurity around the world. Over the past five years, the course has produced teams involving students from nursing, engineering, agricultural economics, biology, and food science working together to develop sustainable, community-scale drinking water treatment systems. In partnership with Aqua Clara International, the student team in 2017 established a drinking water treatment system at …
Associative Learning Contributes To The Increased Water Intake Observed After Daily Injections Of Angiotensin Ii, Maggie Postolache, Jessica Santollo, Derek Daniels
Associative Learning Contributes To The Increased Water Intake Observed After Daily Injections Of Angiotensin Ii, Maggie Postolache, Jessica Santollo, Derek Daniels
Biology Faculty Publications
Daily injections of angiotensin II (AngII) cause a progressive increase of water intake that resembles a classically ascribed non-associative sensitization. Consistent with the presumption that the observed increase in intake was sensitization, we hypothesized that it resulted from a pharmacological interaction between AngII and its receptor. To test this hypothesis, and remove the influence of drinking itself, we implemented a delay in water access after injection of AngII (icv) on four consecutive ‘induction days,’ and then measured intake on the next day (‘test day’) when rats were allowed to drink immediately after AngII. The delay in water access effectively reduced …
Modeling Virus Coinfection To Inform Management Of Maize Lethal Necrosis In Kenya, Frank H. Hilker, Linda S. J. Allen, Vrushali A. Bokil, Cheryl J. Briggs, Zhilan Feng, Karen A. Garrett, Louis J. Gross, Frédéric M. Hamelin, Michael J. Jeger, Carrie A. Manore, Alison G. Power, Margaret G. Redinbaugh, Megan A. Rúa, Nik J. Cunniffee
Modeling Virus Coinfection To Inform Management Of Maize Lethal Necrosis In Kenya, Frank H. Hilker, Linda S. J. Allen, Vrushali A. Bokil, Cheryl J. Briggs, Zhilan Feng, Karen A. Garrett, Louis J. Gross, Frédéric M. Hamelin, Michael J. Jeger, Carrie A. Manore, Alison G. Power, Margaret G. Redinbaugh, Megan A. Rúa, Nik J. Cunniffee
Biological Sciences Faculty Publications
Maize lethal necrosis (MLN) has emerged as a serious threat to food security in sub-Saharan Africa. MLN is caused by coinfection with two viruses, Maize chlorotic mottle virus and a potyvirus, often Sugarcane mosaic virus. To better understand the dynamics of MLN and to provide insight into disease management, we modeled the spread of the viruses causing MLN within and between growing seasons. The model allows for transmission via vectors, soil, and seed, as well as exogenous sources of infection. Following model parameterization, we predict how management affects disease prevalence and crop performance over multiple seasons. Resource-rich farmers with …
Microbiology For Allied Health Students: Instructional Materials, Molly Smith, Sara Selby
Microbiology For Allied Health Students: Instructional Materials, Molly Smith, Sara Selby
Biological Sciences Ancillary Materials
This is a collection of instructional materials for the following open textbook and lab manual:
Authors' Description:
The materials in this collection were developed from various sources as a means of engaging students and assessing their understanding of the course content. Included in the Active Learning Strategies are several game-type activities, as well as a webquest that serves as a directed research project designed to supplement the information found in their lab manual.
The Case Studies build on information from the remixed version of the OpenStax Microbiology …