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Articles 1 - 30 of 104
Full-Text Articles in Entire DC Network
Mir319a Targeting Of Tcp4 Is Critical For Petal Growth And Development In Arabidopsis, Anwesha Nag, Stacey King, Thomas Jack
Mir319a Targeting Of Tcp4 Is Critical For Petal Growth And Development In Arabidopsis, Anwesha Nag, Stacey King, Thomas Jack
Dartmouth Scholarship
In a genetic screen in a drnl-2 background, we isolated a loss-of-function allele in miR319a (miR319a129). Previously, miR319a has been postulated to play a role in leaf development based on the dramatic curled-leaf phenotype of plants that ectopically express miR319a (jaw-D). miR319a129 mutants exhibit defects in petal and stamen development; petals are narrow and short, and stamens exhibit defects in anther development. The miR319a129 loss-of-function allele contains a single-base change in the middle of the encoded miRNA, which reduces the ability of miR319a to recognize targets. Analysis of the expression patterns of the …
Gbdr Regulates Pseudomonas Aeruginosa Plch And Pchp Transcription In Response To Choline Catabolites, Matthew J. Wargo, Tiffany C. Ho, Maegan J. Gross, Laurie A. Whittaker, Deborah A. Hogan
Gbdr Regulates Pseudomonas Aeruginosa Plch And Pchp Transcription In Response To Choline Catabolites, Matthew J. Wargo, Tiffany C. Ho, Maegan J. Gross, Laurie A. Whittaker, Deborah A. Hogan
Dartmouth Scholarship
Pseudomonas aeruginosa hemolytic phospholipase C, PlcH, can degrade phosphatidylcholine (PC) and sphingomyelin in eukaryotic cell membranes and extracellular PC in lung surfactant. Numerous studies implicate PlcH in P. aeruginosa virulence. The phosphorylcholine released by PlcH activity on phospholipids is hydrolyzed by a periplasmic phosphorylcholine phosphatase, PchP. Both plcH gene expression and PchP enzyme activity are positively regulated by phosphorylcholine degradation products, including glycine betaine. Here we report that the induction of plcH and pchP transcription by glycine betaine is mediated by GbdR, an AraC family transcription factor. Mutants that lack gbdR are unable to induce plcH and pchP in media …
Consent To The Use Of Stored Dna For Genetics Research: A Survey Of Attitudes In The Jewish Population, Marc D. Schwartz, Karen H. Rothenberg, Linda Joseph, Judith Benkendorf, Caryn Lerman
Consent To The Use Of Stored Dna For Genetics Research: A Survey Of Attitudes In The Jewish Population, Marc D. Schwartz, Karen H. Rothenberg, Linda Joseph, Judith Benkendorf, Caryn Lerman
Karen H. Rothenberg
No abstract provided.
Judging Genes: Implications Of The Second Generation Of Genetic Tests In The Courtroom, Diane E. Hoffmann, Karen H. Rothenberg
Judging Genes: Implications Of The Second Generation Of Genetic Tests In The Courtroom, Diane E. Hoffmann, Karen H. Rothenberg
Karen H. Rothenberg
The use of DNA tests for identification has revolutionized court proceedings in criminal and paternity cases. Now, requests by litigants to admit or compel a second generation of genetic tests – tests to confirm or predict genetic diseases and conditions – threaten to affect judicial decision-making in many more contexts. Unlike DNA tests for identification, these second generation tests may provide highly personal health and behavioral information about individuals and their relatives and will pose new challenges for trial court judges. This article reports on an original empirical study of how judges analyze these requests and uses the study results …
Genetic Information And Health Insurance: State Legislative Approaches, Karen H. Rothenberg
Genetic Information And Health Insurance: State Legislative Approaches, Karen H. Rothenberg
Karen H. Rothenberg
No abstract provided.
Social Implications Of Genetic Testing, Karen H. Rothenberg
Social Implications Of Genetic Testing, Karen H. Rothenberg
Karen H. Rothenberg
This paper examines the social implications of predictive genetic testing and its impact on the insurance industry. Although the Human Genome Project has the potential to improve the health of our nation, it also may serve as a means of highlighting genetic differences among individuals and ethnic groups. Thus, if we are to reach the full promise of the Project, society must address the public's fears of genetic discrimination in insurance and employment context. Following an analysis of state and federal legislation on genetic privacy and discrimination, the paper concludes with a challenge to the insurance industry to work with …
Genetic Information And The Workplace: Legislative Approaches And Policy Challenges, Karen H. Rothenberg, Barbara Fuller, Mark Rothstein, Troy Duster, Mary Jo Ellis Kahn, Rita Cunningham, Beth Fine, Kathy Hudson, Mary-Claire King, Patricia Murphy, Gary Swergold, Francis Collins
Genetic Information And The Workplace: Legislative Approaches And Policy Challenges, Karen H. Rothenberg, Barbara Fuller, Mark Rothstein, Troy Duster, Mary Jo Ellis Kahn, Rita Cunningham, Beth Fine, Kathy Hudson, Mary-Claire King, Patricia Murphy, Gary Swergold, Francis Collins
Karen H. Rothenberg
No abstract provided.
Protecting Workers From Genetic Discrimination, Karen H. Rothenberg
Protecting Workers From Genetic Discrimination, Karen H. Rothenberg
Karen H. Rothenberg
No abstract provided.
The Scarlet Gene: Behavioral Genetics, Criminal Law, And Racial And Ethnic Stigma, Karen H. Rothenberg, Alice Wang
The Scarlet Gene: Behavioral Genetics, Criminal Law, And Racial And Ethnic Stigma, Karen H. Rothenberg, Alice Wang
Karen H. Rothenberg
Imagine that a scientist from the state university asks you and your family to participate in a study on a particular gene variant associated with alcoholism. The project focuses on your ethnic group, the Tracy Islanders, who have a higher incidence of alcoholism, as well as a higher incidence of the gene variant, than the general population. You will not be informed whether you have the gene variant, but your participation in the study might help scientists develop drugs to help individuals control their addiction to alcohol. You have a family history of alcoholism, and you are concerned that your …
When Should Judges Admit Or Compel Genetic Tests?, Diane E. Hoffmann, Karen H. Rothenberg
When Should Judges Admit Or Compel Genetic Tests?, Diane E. Hoffmann, Karen H. Rothenberg
Karen H. Rothenberg
No abstract provided.
The Potential For Discrimination In Health Insurance Based On Predictive Genetic Tests, Karen H. Rothenberg
The Potential For Discrimination In Health Insurance Based On Predictive Genetic Tests, Karen H. Rothenberg
Karen H. Rothenberg
No abstract provided.
National Institutes Of Health Workshop Statement. Reproductive Genetic Testing: Impact On Women, Karen H. Rothenberg, Elizabeth Thomson
National Institutes Of Health Workshop Statement. Reproductive Genetic Testing: Impact On Women, Karen H. Rothenberg, Elizabeth Thomson
Karen H. Rothenberg
No abstract provided.
The Social Implications Of The Use Of Stored Tissue Samples: Context, Control, And Community, Karen H. Rothenberg
The Social Implications Of The Use Of Stored Tissue Samples: Context, Control, And Community, Karen H. Rothenberg
Karen H. Rothenberg
No abstract provided.
Cancer Genetic Susceptibility Testing: Ethical And Policy Implications For Future Research And Clinical Practice, Benjamin S. Wilfond, Karen H. Rothenberg, Elizabeth J. Thomson, Caryn Lerman
Cancer Genetic Susceptibility Testing: Ethical And Policy Implications For Future Research And Clinical Practice, Benjamin S. Wilfond, Karen H. Rothenberg, Elizabeth J. Thomson, Caryn Lerman
Karen H. Rothenberg
No abstract provided.
Privacy In Genetics Research, Barbara Fuller, Mary Jo Ellis Kahn, P. A. Barr, L. Biesecker, E. Crowley, J. Garber, M. K. Mansoura, Patricia Murphy, J. Murray, J. Phillips, Karen H. Rothenberg, Mark Rothstein, J. Stopfer, Gary Swergold, B. Weber, Francis Collins, Kathy Hudson
Privacy In Genetics Research, Barbara Fuller, Mary Jo Ellis Kahn, P. A. Barr, L. Biesecker, E. Crowley, J. Garber, M. K. Mansoura, Patricia Murphy, J. Murray, J. Phillips, Karen H. Rothenberg, Mark Rothstein, J. Stopfer, Gary Swergold, B. Weber, Francis Collins, Kathy Hudson
Karen H. Rothenberg
No abstract provided.
Toward A Framework Of Mutualism: The Jewish Community In Genetics Research, Karen H. Rothenberg, Amy B. Rutkin
Toward A Framework Of Mutualism: The Jewish Community In Genetics Research, Karen H. Rothenberg, Amy B. Rutkin
Karen H. Rothenberg
No abstract provided.
Advances In Genetic Research And Technologies: Challenges For Public Policy, Karen H. Rothenberg
Advances In Genetic Research And Technologies: Challenges For Public Policy, Karen H. Rothenberg
Karen H. Rothenberg
No abstract provided.
Movements, Relatedness And Modeled Genetic Manipulation Of White-Tailed Deer, Stephen Lance Webb
Movements, Relatedness And Modeled Genetic Manipulation Of White-Tailed Deer, Stephen Lance Webb
Theses and Dissertations
White-tailed deer (Odocoileus virginianus) have been intensively studied across their range. However, many aspects of the white-tailed deer’s ecology have not been studied or are difficult to study. The advent of global positioning system (GPS) collar technology and molecular genetics techniques now allows researchers to collect fine-scale and cryptic phenomena. In addition, selective harvest of male white-tailed deer, based on antler size, has not been critically evaluated. Thus, development and use of quantitative genetics models will be useful for elucidating the effects of selective harvest on mean population antler size. I used GPS collar technology to further understand white-tailed deer …
Genetic Variations In Three Interacting Single Nucleotide Polymorphisms And The Risk Of Preterm Birth In Black Families, Margaret Steinbach
Genetic Variations In Three Interacting Single Nucleotide Polymorphisms And The Risk Of Preterm Birth In Black Families, Margaret Steinbach
Open Access Dissertations
Preterm birth, defined as birth prior to 37 completed weeks gestation, is a serious health concern. Despite advances in health care screening and interventions, the rate of preterm birth in the United States has risen more than 30 percent since 1981. In 2006, Menon and associates reported the first multilocus genetic interaction in three single nucleotide polymorphisms predictive of spontaneous preterm birth in a population of White mothers. A gene association study using a case-control design was conducted to determine whether the results of the Menon study were also true for Black women and their infants. The case group included …
Light-Related Photosynthetic Gene Expression And Enzyme Activity In The Heterokont Alga Vaucheria Litorea And Its Symbiotic Partner The Sacoglossan Mollusc Elysia Chlorotica, Kara M. Soule
Electronic Theses and Dissertations
Photosynthesis is comprised of tightly coupled reactions and therefore requires strict matrices of regulation, particularly involving alterations in gene expression and enzyme activity within the nucleus and plastid. Extensive research has been carried out on these light-regulated mechanisms in plants and green algae, however, much less is known in the red algal lineage, including heterokonts. The goal of this study was to investigate the influence of light on photosynthetic gene expression and select enzyme activity in the heterokont alga Vaucheria litorea and its symbiotic partner Elysia chlorotica, a photosynthetic sacoglossan mollusc (sea slug). Elysia chlorotica harbors V. litorea plastids …
Does Patent Strategy Shape The Long-Run Supply Of Public Knowledge? Evidence From Human Genetics, Kenneth Guang-Lih Huang, Fiona Murray
Does Patent Strategy Shape The Long-Run Supply Of Public Knowledge? Evidence From Human Genetics, Kenneth Guang-Lih Huang, Fiona Murray
Research Collection Lee Kong Chian School Of Business
Knowledge-based firms seeking competitive advantage often draw on the public knowledge stream (ideas embedded in public commons institutions) as the foundation for private knowledge (ideas firms protect through private intellectual property [IP] institutions). However, understanding of the converse relationship—the impact of private knowledge strategies on public knowledge production—is limited. We examine this question in human genetics, where policy makers debate expanding IP ownership over the human genome. Our difference-in-differences estimates show that gene patents decrease public genetic knowledge, with broader patent scope, private sector ownership, patent thickets, fragmented patent ownership, and a gene's commercial relevance exacerbating their effect.
Post-Transcriptional Regulation Of Rpos And Hema In Salmonella, Amy Madeline Jones
Post-Transcriptional Regulation Of Rpos And Hema In Salmonella, Amy Madeline Jones
Graduate Theses, Dissertations, and Problem Reports
The first part of this thesis is dedicated to translational regulation of rpoS mRNA by the small noncoding RNAs (sRNAs), DsrA and RprA, in two closely related enteric bacteria, Escherichia coli, and Salmonella enterica serovar Typhimurium. The rpoS gene encodes a second vegetative sigma factor for RNA polymerase, which directs the cell's transcriptional response to general stress and entry into stationary phase. The rpoS gene is highly conserved among the gamma-branch of proteobacteria, and sRNAs are highly conserved in related species. In fact, sequence conservation is thought to have predictive value in sRNA discovery and functional conservation is largely assumed. …
Thermoregulation Of Capsule Production Of Streptococcus Pyogenes Strain Hsc5, Trilce Michelle Galeas
Thermoregulation Of Capsule Production Of Streptococcus Pyogenes Strain Hsc5, Trilce Michelle Galeas
Theses
Group A Streptococcus (GAS) is responsible for mild and common infections like tonsillitis and pharyngitis, and more serious invasive disorders like necrotizing fasciitis and glomerulonephritis. The ability to invade tissues is closely linked to the virulence factors expressed by the bacterium. Hyaluronic acid capsule expression is variable among all the strains in S. pyogenes and confers the capacity to evade the immune response. In a previous study, it was found that capsule production in CovR mutants was temperature-regulated, showing no capsule production at 37℃ but increased production was observed at 25℃. In this study, the objective is to find the …
Cryptic Subtelomeric Rearrangements And Studies Of Telomere Length, Jasen Lee Wise
Cryptic Subtelomeric Rearrangements And Studies Of Telomere Length, Jasen Lee Wise
Graduate Theses, Dissertations, and Problem Reports
Study One. An estimated five percent of individuals with unexplained mental retardation (MR) have chromosomally unbalanced subtelomere regions. Around half of these individuals inherited the imbalance from a parent with a balanced rearrangement. The frequency of carriers for cryptic balanced translocations is unknown. To determine this frequency, blood samples received from 565 out of 978 phenotypically normal, unrelated individuals were examined using fluorescent in situ hybridization (FISH) probes to analyze all subtelomere regions. No balanced subtelomeric rearrangements were identified. The frequency of balanced cryptic translocations in the general population was estimated to be 1/8,000 from the literature. However, three females …
Ceramide Kinase Regulates Phospholipase C And Phosphatidylinositol 4, 5, Bisphosphate In Phototransduction, Ujjaini Dasgupta, Takeshi Bamba, Salvatore Chiantia, Pusha Karim, Ahmad N. Abou Tayoun
Ceramide Kinase Regulates Phospholipase C And Phosphatidylinositol 4, 5, Bisphosphate In Phototransduction, Ujjaini Dasgupta, Takeshi Bamba, Salvatore Chiantia, Pusha Karim, Ahmad N. Abou Tayoun
Dartmouth Scholarship
Phosphoinositide-specific phospholipase C (PLC) is a central effector for many biological responses regulated by G-protein-coupled receptors including Drosophila phototransduction where light sensitive channels are activated downstream of NORPA, a PLCbeta homolog. Here we show that the sphingolipid biosynthetic enzyme, ceramide kinase, is a novel regulator of PLC signaling and photoreceptor homeostasis. A mutation in ceramide kinase specifically leads to proteolysis of NORPA, consequent loss of PLC activity, and failure in light signal transduction. The mutant photoreceptors also undergo activity-dependent degeneration. Furthermore, we show that a significant increase in ceramide, resulting from lack of ceramide kinase, perturbs the membrane microenvironment of …
Quantifying And Resolving Multiple Vector Transformants In S. Cerevisiae Plasmid Libraries, Thomas C. Scanlon, Elizabeth C. Gray, Karl E. Griswold
Quantifying And Resolving Multiple Vector Transformants In S. Cerevisiae Plasmid Libraries, Thomas C. Scanlon, Elizabeth C. Gray, Karl E. Griswold
Dartmouth Scholarship
In addition to providing the molecular machinery for transcription and translation, recombinant microbial expression hosts maintain the critical genotype-phenotype link that is essential for high throughput screening and recovery of proteins encoded by plasmid libraries. It is known that Escherichia coli cells can be simultaneously transformed with multiple unique plasmids and thusly complicate recombinant library screening experiments. As a result of their potential to yield misleading results, bacterial multiple vector transformants have been thoroughly characterized in previous model studies. In contrast to bacterial systems, there is little quantitative information available regarding multiple vector transformants in yeast. Saccharomyces cerevisiae is the …
Decreased Replication Origin Activity In Temporal Transition Regions, Zeqiang Guan, Christina M. Hughes, Settapong Kosiyatrakul, Paolo Norio, Ranjan Sen, Steven Fiering
Decreased Replication Origin Activity In Temporal Transition Regions, Zeqiang Guan, Christina M. Hughes, Settapong Kosiyatrakul, Paolo Norio, Ranjan Sen, Steven Fiering
Dartmouth Scholarship
In the mammalian genome, early- and late-replicating domains are often separated by temporal transition regions (TTRs) with novel properties and unknown functions. We identified a TTR in the mouse immunoglobulin heavy chain (Igh) locus, which contains replication origins that are silent in embryonic stem cells but activated during B cell development. To investigate which factors contribute to origin activation during B cell development, we systematically modified the genetic and epigenetic status of the endogenous Igh TTR and used a single-molecule approach to analyze DNA replication. Introduction of a transcription unit into the Igh TTR, activation of gene transcription, …
Wnt Pathway Reprogramming During Human Embryonal Carcinoma Differentiation And Potential For Therapeutic Targeting, Grace E. Snow, Allison C. Kasper, Alexander M. Busch, Elisabeth Schwarz, Katherine E. Ewings, Thomas Bee, Michael J. Spinella, Ethan Dmitrovsky, Sarah J. Freemantle
Wnt Pathway Reprogramming During Human Embryonal Carcinoma Differentiation And Potential For Therapeutic Targeting, Grace E. Snow, Allison C. Kasper, Alexander M. Busch, Elisabeth Schwarz, Katherine E. Ewings, Thomas Bee, Michael J. Spinella, Ethan Dmitrovsky, Sarah J. Freemantle
Dartmouth Scholarship
Testicular germ cell tumors (TGCTs) are classified as seminonas or non-seminomas of which a major subset is embryonal carcinoma (EC) that can differentiate into diverse tissues. The pluripotent nature of human ECs resembles that of embryonic stem (ES) cells. Many Wnt signalling species are regulated during differentiation of TGCT-derived EC cells. This study comprehensively investigated expression profiles of Wnt signalling components regulated during induced differentiation of EC cells and explored the role of key components in maintaining pluripotency.
Sarz Promotes The Expression Of Virulence Factors And Represses Biofilm Formation By Modulating Sara And Agr In Staphylococcus Aureus, Sandeep Tamber, Ambrose L. Cheung
Sarz Promotes The Expression Of Virulence Factors And Represses Biofilm Formation By Modulating Sara And Agr In Staphylococcus Aureus, Sandeep Tamber, Ambrose L. Cheung
Dartmouth Scholarship
Staphylococcus aureus is a remarkably adaptable organism capable of multiple modes of growth in the human host, as a part of the normal flora, as a pathogen, or as a biofilm. Many of the regulatory pathways governing these modes of growth are centered on the activities of two regulatory molecules, the DNA binding protein SarA and the regulatory RNAIII effector molecule of the agr system. Here, we describe the modulation of these regulators and their downstream target genes by SarZ, a member of the SarA/MarR family of transcriptional regulators. Transcriptional and phenotypic analyses of a sarZ mutant demonstrated that the …
Integral Membrane Proteins Brr6 And Apq12 Link Assembly Of The Nuclear Pore Complex To Lipid Homeostasis In The Endoplasmic Reticulum, Christine A. Hodge, Vineet Choudhary, Michael J. Wolyniak, John J. Scarcelli, Roger Schneiter, Charles N. Cole
Integral Membrane Proteins Brr6 And Apq12 Link Assembly Of The Nuclear Pore Complex To Lipid Homeostasis In The Endoplasmic Reticulum, Christine A. Hodge, Vineet Choudhary, Michael J. Wolyniak, John J. Scarcelli, Roger Schneiter, Charles N. Cole
Dartmouth Scholarship
Cells of Saccharomyces cerevisiae lacking Apq12, a nuclear envelope (NE)-endoplasmic reticulum (ER) integral membrane protein, are defective in assembly of nuclear pore complexes (NPCs), possibly because of defects in regulating membrane fluidity. We identified BRR6, which encodes an essential integral membrane protein of the NE-ER, as a dosage suppressor of apq12 Delta. Cells carrying the temperature-sensitive brr6-1 allele have been shown to have defects in nucleoporin localization, mRNA metabolism and nuclear transport. Electron microscopy revealed that brr6-1 cells have gross NE abnormalities and proliferation of the ER. brr6-1 cells were hypersensitive to compounds that affect membrane biophysical properties and to …