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Articles 1 - 30 of 81
Full-Text Articles in Cell and Developmental Biology
Phenotyping Regression In A Female Mouse Model For Rett Syndrome Using Computational Neuroethology Tools, Michael J. Mykins
Phenotyping Regression In A Female Mouse Model For Rett Syndrome Using Computational Neuroethology Tools, Michael J. Mykins
Doctoral Dissertations
Regression is defined as loss of acquired skills over time and is a key feature of many neurodevelopmental disorders such as Rett syndrome (RTT). RTT is caused by mutations in the X-linked gene Methyl CpG-Binding Protein 2 (MECP2) and is characterized by a period of typical development with subsequent regression of previously acquired motor and speech skills in girls. In human and animal models, it is clear syndromic phenotypes are dynamic over time but phenotyping regression over time in animal models has remained elusive. Lack of established timelines to study the molecular, cellular, and behavioral features of regression in female …
Investigating The Role Of Spatial Compartmentalization And Genomic Translocations In Metastatic Cancer: A Multi-Omic Analysis, Joshua Harris Garretson
Investigating The Role Of Spatial Compartmentalization And Genomic Translocations In Metastatic Cancer: A Multi-Omic Analysis, Joshua Harris Garretson
Chancellor’s Honors Program Projects
No abstract provided.
A Novel Transmembrane Ligand Inhibits T Cell Receptor Activation, Yujie Ye
A Novel Transmembrane Ligand Inhibits T Cell Receptor Activation, Yujie Ye
Doctoral Dissertations
T lymphocytes (T cells) play essential roles in the adaptive immune system. Each mature T cell expresses one type of functional T cell receptor (TCR). The TCR recognizes antigens bound to the major histocompatibility complex (MHC) in antigen presenting cells. The resulting stimulation signal crosses the transmembrane domain of TCR and initiates downstream signaling cascades. The human immune system relies on TCRs to recognize a variety of pathogens. Normally, TCR can distinguish the self-antigens from pathogenic antigens. However, dysfunction or aberrant expression of TCRs causes different inflammatory and autoimmune diseases, which afflict millions of people annually (Chapter I). Current treatments …
What I Talk About When I Talk About Integration Of Single-Cell Data, Yang Xu
What I Talk About When I Talk About Integration Of Single-Cell Data, Yang Xu
Doctoral Dissertations
Over the past decade, single-cell technologies evolved from profiling hundreds of cells to millions of cells, and emerged from a single modality of data to cover multiple views at single-cell resolution, including genome, epigenome, transcriptome, and so on. With advance of these single-cell technologies, the booming of multimodal single-cell data creates a valuable resource for us to understand cellular heterogeneity and molecular mechanism at a comprehensive level. However, the large-scale multimodal single-cell data also presents a huge computational challenge for insightful integrative analysis. Here, I will lay out problems in data integration that single-cell research community is interested in and …
Metabolism In The Colonocyte: Where Bacteria And Diet Meet, Bohye Park
Metabolism In The Colonocyte: Where Bacteria And Diet Meet, Bohye Park
Doctoral Dissertations
The host-microbiome interaction and the functions of microbial-derived metabolites, including butyrate, are important in colon health. Butyrate is the preferred energy source in colonocytes and has multiple physiological functions in the colon. A metabolic shift in colonocytes toward increased glucose utilization from butyrate oxidation is followed by several critical genetic modifications in cancerous colonocytes. Moreover, it has been suggested that the gut-microbiota composition is influenced by environmental factors, such as diets and the host's physiological status. Therefore, an understanding of the role of colonocyte metabolism toward impacting the host-microbiota commensal relationship would be an important step in understanding the functional …
Investigating The Role Of Dullard And Tmem-188 In Lipid Droplet Biogenesis In Mammalian Cells, Mia Kaitlin Buono
Investigating The Role Of Dullard And Tmem-188 In Lipid Droplet Biogenesis In Mammalian Cells, Mia Kaitlin Buono
Chancellor’s Honors Program Projects
No abstract provided.
Calmodulin Like 38 Is Required For Autophagy Of Hypoxia-Induced Cytoplasmic Rna Granules In Arabidopsis Thaliana, Sterling Field
Calmodulin Like 38 Is Required For Autophagy Of Hypoxia-Induced Cytoplasmic Rna Granules In Arabidopsis Thaliana, Sterling Field
Doctoral Dissertations
In response to the energy crisis resulting from submergence stress and hypoxia, the model plant Arabidopsis thaliana limits non-essential mRNA translation, and accumulates cytosolic stress granules. Stress granules are phase-separated mRNA-protein particles that partition transcripts for various fates: storage, degradation, or return to translation after stress alleviation. Another response by the plant cell to low oxygen stress is the induction of the turnover pathway autophagy. Stress granule regulation by autophagy occurs by a ‘granulophagy’ pathway in yeast and mammalian systems through which parts or whole stress granules are degraded. Whether this occurs in plants has not been investigated.
A connection …
Erecta Family Genes Regulate The Shoot Apical Meristem And Organ Formation, Daniel A. Degennaro
Erecta Family Genes Regulate The Shoot Apical Meristem And Organ Formation, Daniel A. Degennaro
Doctoral Dissertations
Plants are sessile and must adjust their organ growth to their environments. A reservoir of stem cells in the shoot apical meristem (SAM) supplies cells for differentiation into organs. The SAM must balance organ production with stem cell maintenance. The ERECTA family (ERfs) encodes the leucine-rich repeat receptor-like kinases ERECTA (ER), ERECTA-LIKE 1 (ERL1), and ERL2. ERf signaling regulates organ initiation and stem cell maintenance. Results presented in this work include the following:
1) WUSCHEL (WUS) and CLAVATA3 (CLV3) make up a negative feedback loop to maintain SAM size. WUS and CLV3 expression localization is critical for …
The Effect Of Bovine Endometrial Cell Conditioned Media On In Vitro Produced Bovine Embryo Development And Gene Expression, Mary A. Oliver
The Effect Of Bovine Endometrial Cell Conditioned Media On In Vitro Produced Bovine Embryo Development And Gene Expression, Mary A. Oliver
Masters Theses
In vitro produced (IVP) bovine embryos provide enhanced genetic value and a means for studying early embryonic development. However, IVP embryos are developmentally compromised and are lower quality compared to in vivo derived (IVD) embryos. Consequently, after transfer pregnancy rates from IVP embryos are consistently lower, as they exhibit the highest amounts of pregnancy failure during the early embryonic phase (prior to day 28). Progesterone (P4) has been shown to influence bovine endometrial epithelial (EPI) and stromal fibroblast (SF) cells to secrete developmentally important molecules that promote early embryo development and conceptus elongation. However, IVP embryos are not exposed to …
The Histone Variant H2av Regulates Stress Responses And Tissue Development Through Interactions With Chromatin Insulator Proteins In Drosophila Melanogaster, James Ryan Simmons
The Histone Variant H2av Regulates Stress Responses And Tissue Development Through Interactions With Chromatin Insulator Proteins In Drosophila Melanogaster, James Ryan Simmons
Doctoral Dissertations
The ability of a cell to sense and respond to various forms of stress is essential to maintain integrity of the genome. Numerous pathways have been implicated in cellular responses to environmental and genotoxic stresses, often involving proteins and complexes that bind DNA directly to orchestrate changes in transcription and genome organization. Chromatin insulators describe a class of protein complex that bind specific sequences in the genome and work through two classically described functions: to restrict communication between enhancers and promoters through physical separation into different genomic domains and to prevent the spread of heterochromatin into euchromatic regions of the …
The Role Of Cdc42 Regulation In Cell Growth Pattern And Timing, Julie Robinson
The Role Of Cdc42 Regulation In Cell Growth Pattern And Timing, Julie Robinson
Doctoral Dissertations
In fission yeast, polarized cell growth stops during division and resumes after cell separation at the end that existed in the previous generation. It is unclear how growth occurs specifically at this end after cell division. Via a pedigree analysis of mutant cells which display a unique polarity phenotype, we show the existence of a memory of growth. This memory of growth exists at the pre-existing cell end, which grew in the previous generation, and facilitates growth at that end in the next generation. This memory of growth gives the pre-existing end some advantage in a competition for active Cdc42, …
Understanding The Novel Role Of Checkpoint Protein Rough Deal In Homolog Orientation And Centromeric Cohesion In Drosophila Male Meiosis, Qiutao He
Doctoral Dissertations
Meiosis is a central mechanism in sexual reproduction, through which the diploid precursor cells in the germline produce haploid gametes. After fertilization, a new set of diploid genome forms in the offspring with the characteristics of mother and father. The faithful transmission of genetic material to next generation relies on the fidelity of chromosome segregation during meiosis. A variety of mechanisms regulate the chromosome segregations in meiosis, including homolog interaction, chromosome cohesion, and sister-chromatid orientation. In most eukaryotic organisms, homolog interactions are built by the formation of chiasmata resulted from crossovers, but it is absent in male Drosophila in which …
Biofabricated Constructs Of Carbon-Based Nanoparticles With Mesenchymal Stem Cells For Orthopedic Repair, Steven D. Newby
Biofabricated Constructs Of Carbon-Based Nanoparticles With Mesenchymal Stem Cells For Orthopedic Repair, Steven D. Newby
Doctoral Dissertations
Breakthroughs in tissue engineering are moving at a rapid rate especially in the regenerative bone biofabrication. Technology growth in the field of additive manufacturing (AM) such 3D bioprinting which provides the ability to create biocompatible 3D construct on which a cell source could be seeded is an encouraging substitute to autologous grafts.
This present research aims to biofabricate a construct for bone tissue engineering using AM technology. The biocompatible material was chosen corresponding to bones extracellular matrix (ECM) composition, which demonstrates an inorganic and organic development phase: Poly (lactic-glycolic acid) was chosen as the polymeric matrix of the compound, due …
Dna Damage And Aging In Progeria Compared To Healthy Cells., Ashtyn Marie Hill
Dna Damage And Aging In Progeria Compared To Healthy Cells., Ashtyn Marie Hill
Chancellor’s Honors Program Projects
No abstract provided.
Iojap: Morphological And Physiological Phenotype Characterization In Arabidopsis, Thomas Jay Payne
Iojap: Morphological And Physiological Phenotype Characterization In Arabidopsis, Thomas Jay Payne
Doctoral Dissertations
IOJAP protein is found in all organisms that contain a ribosome of bacterial origin. The majority of studies suggest that IOJAP plays a role in translation, although this has yet to be thoroughly investigated in plants. Using Arabidopsis thaliana, an extensive phenotype characterization of iojap mutants was performed. Many processes of plant growth were slightly impaired at optimal temperature (22˚C) but became severely hindered at low temperature (12˚C and 4˚C). These cold temperature defects manifested in an overall reduction of plant growth as well as variegation, chlorosis, leaf hyponasty, as well as reduced maximum quantum yield (Fv/F …
Investigating The Effects Of Excitotoxic Stimuli On The Suprachiasmatic Nucleus, Rachel A. Brandes
Investigating The Effects Of Excitotoxic Stimuli On The Suprachiasmatic Nucleus, Rachel A. Brandes
Chancellor’s Honors Program Projects
No abstract provided.
A Mitotic Cue Triggers The Resumption Of Cell Growth After Division, Afton R. Russell
A Mitotic Cue Triggers The Resumption Of Cell Growth After Division, Afton R. Russell
Chancellor’s Honors Program Projects
No abstract provided.
The Function Of Ecdysone And Inhibiting Programmed Cell Death In Death Class Iii Neurons Of Drosophila Melanogaster, Nikolas Richard Likourentzos
The Function Of Ecdysone And Inhibiting Programmed Cell Death In Death Class Iii Neurons Of Drosophila Melanogaster, Nikolas Richard Likourentzos
EURēCA: Exhibition of Undergraduate Research and Creative Achievement
The inhibition of programmed cell death is a factor believed to be responsible for the survival of cancer cells. Using Drosophila as models, factors contributing to the process of programmed cell death can be studied. Neurons die throughout Drosophila melanogaster development to allow the addition of new neurons. The groups of neurons programmed to die are Death Class I neurons, Death Class II neurons, and Death Class III neurons. Ecdysone is a hormone responsible for the timing of programmed cell death (PCD) in the Death Class neurons. Elevated levels of ecdysone are associated with the initiation of PCD of Death …
A Cell Cycle Cue Triggers Cell Growth Resumption After Division, Afton R. Russell
A Cell Cycle Cue Triggers Cell Growth Resumption After Division, Afton R. Russell
EURēCA: Exhibition of Undergraduate Research and Creative Achievement
The decoupling of the fundamental processes of cell division and growth is important for maintaining cell integrity. Through a chemical approach, we delayed the clock that controls when cells separate, uncoupling cell division and cell growth. This led to polarized cell growth before the cells completed separation. Using fluorescent markers to denote the cell’s stage in the cell cycle, we observed that only cells that were in mitosis exhibited this uncoupling. Previously it was thought that growth resumption occurred after completion of cell division, but this observation suggests that growth is triggered earlier, from a mitotic cue. This mitotic cue …
Investigating The Role Of The Rough Deal Protein In Spindle Assembly Complex Signaling, Ryan P. Mihealsick
Investigating The Role Of The Rough Deal Protein In Spindle Assembly Complex Signaling, Ryan P. Mihealsick
Chancellor’s Honors Program Projects
No abstract provided.
Investigation For Novel Anti-Apoptotic Factors In The Neurons Of Drosophila Melanogaster, Haylie Rachel Lam
Investigation For Novel Anti-Apoptotic Factors In The Neurons Of Drosophila Melanogaster, Haylie Rachel Lam
Chancellor’s Honors Program Projects
No abstract provided.
Pkm2 Influences The Metabolic Fate Of Butyrate In Colorectal Cancer Cells, Megan Louise Pence
Pkm2 Influences The Metabolic Fate Of Butyrate In Colorectal Cancer Cells, Megan Louise Pence
Chancellor’s Honors Program Projects
No abstract provided.
Iteratively Improving Hi-C Experiments One Step At A Time, Rosela Golloshi, Jacob T. Sanders, Rachel Patton Mccord
Iteratively Improving Hi-C Experiments One Step At A Time, Rosela Golloshi, Jacob T. Sanders, Rachel Patton Mccord
Faculty Publications and Other Works -- Biochemistry, Cellular and Molecular Biology
The 3D organization of eukaryotic chromosomes affects key processes such as gene expression, DNA replication, cell division, and response to DNA damage. The genome-wide chromosome conformation capture (Hi-C) approach can characterize the landscape of 3D genome organization by measuring interaction frequencies between all genomic regions. Hi-C protocol improvements and rapid advances in DNA sequencing power have made Hi-C useful to study diverse biological systems, not only to elucidate the role of 3D genome structure in proper cellular function, but also to characterize genomic rearrangements, assemble new genomes, and consider chromatin interactions as potential biomarkers for diseases. Yet, the Hi-C protocol …
Constitutive Expression Of Thioglucoside Glucohydrolase 1 (Tgg1) Decreases Intercellular Trafficking In Arabidopsis Thaliana, Alessandro Francesco Sarno
Constitutive Expression Of Thioglucoside Glucohydrolase 1 (Tgg1) Decreases Intercellular Trafficking In Arabidopsis Thaliana, Alessandro Francesco Sarno
EURēCA: Exhibition of Undergraduate Research and Creative Achievement
Plasmodesmata (PD) are pores that traverse plant cell walls, providing a route for intercellular trafficking of essential metabolites, nutrients, and signaling molecules between adjacent plant cells, thereby aiding communication. The increased size exclusion limit 2 (ise2) mutant of Arabidopsis thaliana has an increased abundance of branched PD, as well as a greater flux of intercellular trafficking. A search for proteins that interact with ISE2 identified THIOGLUCOSIDE GLUCOHYDROLASE 2 (a myrosinase). A. thaliana also encodes a second, closely-related myrosinase, TGG1. Myrosinases are enzymes that catalyze the hydrolysis of glucosinolates, a type of secondary metabolite that are amino acid derivatives. The breakdown …
Using The Suprachiasmatic Nucleus As A Model System To Assess Tolerance And Withdrawal To Alcohol, Jonathan Houghton Lindsay
Using The Suprachiasmatic Nucleus As A Model System To Assess Tolerance And Withdrawal To Alcohol, Jonathan Houghton Lindsay
Doctoral Dissertations
Alcohol abuse induces many disorders including depression, metabolic syndrome, and sleep disturbances. The strong link between alcohol abuse and sleep problems, along with the close connection between sleep and circadian rhythms, led us to investigate ethanol’s effects on the circadian clock. Previous work has shown that acute ethanol blocks photic phase shifts in vivo and glutamatergic phase shifts in vitro. However, neural systems become tolerant to ethanol across different timeframes. Despite both ethanol tolerance and ethanol withdrawal syndrome being listed as criteria for developing alcohol use disorders, little is known about how ethanol tolerance and withdrawal induced hyperexcitability develop and …
Myosin Xi-I Works In Tandem With A Microtubule-Associated Mechanism To Position The Nucleus In Arabidopsis Root Hairs, Ian Andrew Windham
Myosin Xi-I Works In Tandem With A Microtubule-Associated Mechanism To Position The Nucleus In Arabidopsis Root Hairs, Ian Andrew Windham
Chancellor’s Honors Program Projects
No abstract provided.
Identification Of A General Targeting Motif Guiding Interaction Between Nuclear-Encoded Plastid Precursors And The Translocon Of The Plastid Outer Membrane, Erika N. Sanders
Identification Of A General Targeting Motif Guiding Interaction Between Nuclear-Encoded Plastid Precursors And The Translocon Of The Plastid Outer Membrane, Erika N. Sanders
Chancellor’s Honors Program Projects
No abstract provided.
Characterization Of The Chea2 Chemotaxis Operon In Azospirillum Brasilense, Erin Lutz
Characterization Of The Chea2 Chemotaxis Operon In Azospirillum Brasilense, Erin Lutz
Chancellor’s Honors Program Projects
No abstract provided.
Biophysical Studies Of Cell Division Protein Localization Mechanisms In Escherichia Coli, Matthew Wayne Bailey
Biophysical Studies Of Cell Division Protein Localization Mechanisms In Escherichia Coli, Matthew Wayne Bailey
Doctoral Dissertations
How nanometer-scale proteins position accurately within micron-scale bacteria has intrigued both biologists and physicists alike. A critical process requiring precise protein localization is cell division. In most bacteria, cell division starts with the self-assembly of the FtsZ proteins into filaments that form a ring-like structure encircling the cell at its middle, the Z-ring. The Z-ring is a scaffold for additional proteins that synthesize the lateral cell wall which separates the two daughter cells. If division planes are misplaced relative to bacterial chromosomes, also called nucleoids, daughter cells with incomplete genetic material can be produced. In Escherichia coli, research carried out …
Expansion, Characterization, Differentiation, And Visualization Of Mc 3t3-E1 Preosteoblast Cells: An In Vitro Model To Study Bone Healing And Stem Cell-Mediated Regeneration, Jakob T. Samsel, Madhu Dhar, Austin Bow, Tom Masi
Expansion, Characterization, Differentiation, And Visualization Of Mc 3t3-E1 Preosteoblast Cells: An In Vitro Model To Study Bone Healing And Stem Cell-Mediated Regeneration, Jakob T. Samsel, Madhu Dhar, Austin Bow, Tom Masi
Chancellor’s Honors Program Projects
No abstract provided.