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Articles 601 - 630 of 1778
Full-Text Articles in Medicine and Health Sciences
Characterization Of The Role That Alternative Ribonucleotide Reductases Play In Restoring Replication In The Presence Of Hydroxyurea In Escherichia Coli, Michael Sadek
PSU McNair Scholars Online Journal
DNA replication is essential for cells to grow and divide. Ribonucleotide reductase is an essential enzyme that is responsible for the formation of deoxyribonucleotides that are used in DNA synthesis during replication. Hydroxyurea is a chemotherapeutic agent that is thought to work by specifically inhibiting the ribonuceotide reductase to prevent replication. However, recent studies in E. coli have shown that following an initial period of inhibition, DNA synthesis then recovers in the presence of hydroxyurea, suggesting that the mode of death and cellular response to hydroxyurea is more complex than originally proposed. The E.coli genome encodes three ribonucleotide reductases that …
The Associations Between Environmental Quality And Preterm Birth In The United States, 2000–2005: A Cross-Sectional Analysis, Kristen M. Rappazzo, Lynne C. Messer, Jyotsna S. Jagai, Christine L. Gray, Shannon C. Grabich, Danelle T. Lobdell
The Associations Between Environmental Quality And Preterm Birth In The United States, 2000–2005: A Cross-Sectional Analysis, Kristen M. Rappazzo, Lynne C. Messer, Jyotsna S. Jagai, Christine L. Gray, Shannon C. Grabich, Danelle T. Lobdell
Community Health Faculty Publications and Presentations
Background: Many environmental factors have been independently associated with preterm birth (PTB). However, exposure is not isolated to a single environmental factor, but rather to many positive and negative factors that co-occur. The environmental quality index (EQI), a measure of cumulative environmental exposure across all US counties from 2000—2005, was used to investigate associations between ambient environment and PTB.
Methods: With 2000–2005 birth data from the National Center for Health Statistics for the United States (n = 24,483,348), we estimated the association between increasing quintiles of the EQI and county-level and individual-level PTB; we also considered environmental domain-specific (air, …
Cyclic Rhamnosylated Elongation Factor P Establishes Antibiotic Resistance In Pseudomonas Aeruginosa, Andrei Rajkovic, Sarah Erickson, Anne Witzky, Owen E. Branson, Jin Seo, Philip R. Gafken, Michael A. Frietas, Julian P. Whitelegge, Kym F. Faull, William Wiley Navarre, Andrew J. Darwin, Michael Ibba
Cyclic Rhamnosylated Elongation Factor P Establishes Antibiotic Resistance In Pseudomonas Aeruginosa, Andrei Rajkovic, Sarah Erickson, Anne Witzky, Owen E. Branson, Jin Seo, Philip R. Gafken, Michael A. Frietas, Julian P. Whitelegge, Kym F. Faull, William Wiley Navarre, Andrew J. Darwin, Michael Ibba
Biology, Chemistry, and Environmental Sciences Faculty Articles and Research
Elongation factor P (EF-P) is a ubiquitous bacterial protein that is required for the synthesis of poly-proline motifs during translation. In Escherichia coli and Salmonella enterica, the posttranslational β-lysylation of Lys34 by the PoxA protein is critical for EF-P activity. PoxA is absent from many bacterial species such as Pseudomonas aeruginosa, prompting a search for alternative EF-P posttranslation modification pathways. Structural analyses of P. aeruginosa EF-P revealed the attachment of a single cyclic rhamnose moiety to an Arg residue at a position equivalent to that at which β-Lys is attached to E. coli EF-P. Analysis of the genomes …
Whole Genome Capture Of Vector-Borne Pathogens From Mixed Dna Samples: A Case Study Of Borrelia Burgdorferi, Giovanna Carpi, Katharine S. Walter, Stephen J. Bent, Anne Gatewood Hoen, Maria Diuk-Wasser, Adalgisa Caccone
Whole Genome Capture Of Vector-Borne Pathogens From Mixed Dna Samples: A Case Study Of Borrelia Burgdorferi, Giovanna Carpi, Katharine S. Walter, Stephen J. Bent, Anne Gatewood Hoen, Maria Diuk-Wasser, Adalgisa Caccone
Dartmouth Scholarship
Background:
Rapid and accurate retrieval of whole genome sequences of human pathogens from disease vectors or animal reservoirs will enable fine-resolution studies of pathogen epidemiological and evolutionary dynamics. However, next generation sequencing technologies have not yet been fully harnessed for the study of vector-borne and zoonotic pathogens, due to the difficulty of obtaining high-quality pathogen sequence data directly from field specimens with a high ratio of host to pathogen DNA.
Results:
We addressed this challenge by using custom probes for multiplexed hybrid capture to enrich for and sequence 30 Borrelia burgdorferi genomes from field samples of its arthropod vector. Hybrid …
Alcohol And Hcv: Implications For Liver Cancer, Gyongyi Szabo, Banishree Saha, Terence Bukong
Alcohol And Hcv: Implications For Liver Cancer, Gyongyi Szabo, Banishree Saha, Terence Bukong
Gyongyi Szabo
Liver cancers are one of the deadliest known malignancies which are increasingly becoming a major public health problem in both developed and developing countries. Overwhelming evidence suggests a strong role of infection with hepatitis B and C virus (HBV and HCV), alcohol abuse, as well as metabolic diseases such as obesity and diabetes either individually or synergistically to cause or exacerbate the development of liver cancers. Although numerous etiologic mechanisms for liver cancer development have been advanced and well characterized, the lack of definite curative treatments means that gaps in knowledge still exist in identifying key molecular mechanisms and pathways …
A Novel Human Radixin Peptide Inhibits Hepatitis C Virus Infection At The Level Of Cell Entry, Terence Bukong, Karen Kodys, Gyongyi Szabo
A Novel Human Radixin Peptide Inhibits Hepatitis C Virus Infection At The Level Of Cell Entry, Terence Bukong, Karen Kodys, Gyongyi Szabo
Gyongyi Szabo
Hepatitis C virus infection of hepatocytes is a multistep process involving the interaction between viral and host cell molecules. Recently, we identified ezrin-moesin-radixin proteins and spleen tyrosine kinase (SYK) as important host therapeutic targets for HCV treatment development. Previously, an ezrin hinge region peptide (Hep1) has been shown to exert anti-HCV properties in vivo, though its mechanism of action remains limited. In search of potential novel inhibitors of HCV infection and their functional mechanism we analyzed the anti-HCV properties of different human derived radixin peptides. Sixteen different radixin peptides were derived, synthesized and tested. Real-time quantitative PCR, cell toxicity assay, …
The Genetics Of Hepatitis C Virus Underlie Its Ability To Escape Humoral Immunity, Jay Kolls, Gyongyi Szabo
The Genetics Of Hepatitis C Virus Underlie Its Ability To Escape Humoral Immunity, Jay Kolls, Gyongyi Szabo
Gyongyi Szabo
Hepatitis C virus (HCV) is a leading cause of chronic liver disease, and efforts to develop therapeutic vaccine strategies have been limited by immune escape due to HCV variants that are resistant to current vaccines or HCV variants that rapidly acquire new resistance-conferring mutations. Recently, the crystal structure of the viral envelope protein E2 region was resolved as well as how E2 docks to the host CD81 protein; therefore, antibodies that block this interaction should prevent viral entry into host cells. In this issue of the JCI, Bailey and colleagues show that immune escape of HCV can occur by naturally …
Prepubertal Organochlorine Pesticide Concentrations And Age Of Pubertal Onset Among Russian Boys, Thuy Lam, Paige Williams, Mary Lee, Susan Korrick, Linda Birnbaum, Jane Burns, Oleg Sergeyev, Boris Revich, Larisa Altshul, Donald Patterson, Wayman Turner, Russ Hauser
Prepubertal Organochlorine Pesticide Concentrations And Age Of Pubertal Onset Among Russian Boys, Thuy Lam, Paige Williams, Mary Lee, Susan Korrick, Linda Birnbaum, Jane Burns, Oleg Sergeyev, Boris Revich, Larisa Altshul, Donald Patterson, Wayman Turner, Russ Hauser
Mary M. Lee
BACKGROUND: In animal studies, organochlorine pesticide (OCP) exposure alters pubertal development; however, epidemiological data are limited and inconsistent. OBJECTIVE: To evaluate the associations of serum OCP concentrations [hexachlorobenzene (HCB), beta-hexachlorocyclohexane (beta-HCH), and p,p'-dichlorodiphenyldichloroethylene (p,p'-DDE)] with male pubertal onset. METHODS: In Chapaevsk, Russia, a town environmentally contaminated with OCPs, 350 8-9 year old boys with measured OCPs were enrolled during 2003-2005 and were followed annually for eight years. We evaluated three measures of pubertal onset: testicular volume (TV) > 3 mL in either testis, or stage 2 or greater for genitalia (G2+), or pubic hair (P2+). We used multivariable interval-censored models to …
Association Between Chlorinated Pesticides In The Serum Of Prepubertal Russian Boys And Longitudinal Biomarkers Of Metabolic Function, Jane Burns, Paige Williams, Susan Korrick, Russ Hauser, Oleg Sergeyev, Boris Revich, Thuy Lam, Mary Lee
Association Between Chlorinated Pesticides In The Serum Of Prepubertal Russian Boys And Longitudinal Biomarkers Of Metabolic Function, Jane Burns, Paige Williams, Susan Korrick, Russ Hauser, Oleg Sergeyev, Boris Revich, Thuy Lam, Mary Lee
Mary M. Lee
Organochlorine pesticides (OCPs) have been linked to adult metabolic disorders; however, few studies have examined these associations in childhood. We prospectively evaluated the associations of baseline serum OCPs (hexachlorobenzene, beta-hexachlorocyclohexane, and p,p'-dichlorodiphenyldichloroethylene) in Russian boys with subsequent repeated measurements of serum glucose, insulin, lipids, leptin, and calculated homeostatic model assessment of insulin resistance (IR). During 2003-2005, we enrolled 499 boys aged 8-9 years in a prospective cohort; 318 had baseline serum OCPs and serum biomarkers measured at ages 10-13 years. Multivariable generalized estimating equation and mediation regression models were used to examine associations and direct and indirect (via body mass …
Intact Lkb1 Activity Is Required For Survival Of Dormant Ovarian Cancer Spheroids, Teresa M. Peart, Yudith R. Valdes, Rohann J.M. Correa, Elena Fazio, Monique Bertrand, Jacob Mcgee, Michel Prefontaine, Akira Sugimoto, Gabriel E. Dimattia, Trevor G. Shepherd
Intact Lkb1 Activity Is Required For Survival Of Dormant Ovarian Cancer Spheroids, Teresa M. Peart, Yudith R. Valdes, Rohann J.M. Correa, Elena Fazio, Monique Bertrand, Jacob Mcgee, Michel Prefontaine, Akira Sugimoto, Gabriel E. Dimattia, Trevor G. Shepherd
Anatomy and Cell Biology Publications
Metastatic epithelial ovarian cancer (EOC) cells can form multicellular spheroids while in suspension and disperse directly throughout the peritoneum to seed secondary lesions. There is growing evidence that EOC spheroids are key mediators of metastasis, and they use specific intracellular signalling pathways to control cancer cell growth and metabolism for increased survival. Our laboratory discovered that AKT signalling is reduced during spheroid formation leading to cellular quiescence and autophagy, and these may be defining features of tumour cell dormancy. To further define the phenotype of EOC spheroids, we have initiated studies of the Liver kinase B1 (LKB1)-5′-AMP-activated protein kinase (AMPK) …
The Effects Of Arginine Vasopressin On Maternal Behavior And Aggression In Peromyscus Californicus Mothers, Nathaniel Ng
The Effects Of Arginine Vasopressin On Maternal Behavior And Aggression In Peromyscus Californicus Mothers, Nathaniel Ng
Honors Projects
Research studies since the 1950s have shown that a chemical within the brain called arginine vasopressin (AVP) is associated with the modulation of many different social behaviors in mammals. Some of these behaviors are related to parenting, such as parental care initiation, aggression, social recognition, depression and anxiety. Understanding the physiology behind AVP regulation could allow for the creation of new therapies for treating human social disorders, such as using an AVP receptor antagonist to attenuate anxiety. This project examines how neural injections of AVP and an AVP receptor antagonist affect both maternal care and aggression in female Peromyscus californicus …
Relative Volume Of The Cerebellum In Dolphins And Comparison With Anthropoid Primates, L. Marino, James K. Rilling, Shinko K. Lin, Sam H. Ridgway
Relative Volume Of The Cerebellum In Dolphins And Comparison With Anthropoid Primates, L. Marino, James K. Rilling, Shinko K. Lin, Sam H. Ridgway
Lori Marino, PhD
According to the ‘developmental constraint hypothesis’ of comparative mammalian neuroanatomy, brain growth follows predictable allometric trends. Therefore, brain structures should scale to the entire brain in the same way across mammals. Evidence for a departure from this pattern for cerebellum volume has recently been reported among the anthropoid primates. One of the mammalian groups that has been neglected in tests of the ‘developmental constraint hypothesis’ is the cetaceans (dolphins, whales, and porpoises). Because many cetaceans possess relative brain sizes in the range of primates comparative tests of the ‘developmental constraint hypothesis’ across these two groups could help to delineate the …
Expert–Novice Differences In Mental Models Of Viruses, Vaccines, And The Causes Of Infectious Disease, Benjamin D. Jee, David H. Uttal, Amy N. Spiegel, Judy Diamond
Expert–Novice Differences In Mental Models Of Viruses, Vaccines, And The Causes Of Infectious Disease, Benjamin D. Jee, David H. Uttal, Amy N. Spiegel, Judy Diamond
Amy N. Spiegel
Humans are exposed to viruses everywhere they live, play, and work. Yet people’s beliefs about viruses may be confused or inaccurate, potentially impairing their understanding of scientific information. This study used semi-structured interviews to examine people’s beliefs about viruses, vaccines, and the causes of infectious disease. We compared people at different levels of science expertise: middle school students, teachers, and professional virologists. The virologists described more entities involved in microbiological processes, how these entities behaved, and why. Quantitative and qualitative analyses revealed distinctions in the cognitive organization of several concepts, including infection and vaccination. For example, some students and teachers …
Defining And Assessing Animal Pain, Lynne U. Sneddon, Robert W. Elwood, Shelley A. Adamo, Matthew C. Leach
Defining And Assessing Animal Pain, Lynne U. Sneddon, Robert W. Elwood, Shelley A. Adamo, Matthew C. Leach
Lynne Sneddon, PhD
The detection and assessment of pain in animals is crucial to improving their welfare in a variety of contexts in which humans are ethically or legally bound to do so. Thus clear standards to judge whether pain is likely to occur in any animal species is vital to inform whether to alleviate pain or to drive the refinement of procedures to reduce invasiveness, thereby minimizing pain. We define two key concepts that can be used to evaluate the potential for pain in both invertebrate and vertebrate taxa. First, responses to noxious, potentially painful events should affect neurobiology, physiology and behaviour …
Orexin Receptor Activation Generates Gamma Band Input To Cholinergic And Serotonergic Arousal System Neurons And Drives An Intrinsic Ca(2+)-Dependent Resonance In Ldt And Ppt Cholinergic Neurons, Masaru Ishibashi, Iryna Gumenchuk, Bryan Kang, Catherine Steger, Elizabeth Lynn, Nancy Molina, Leonard M. Eisenberg, Christopher S. Leonard
Orexin Receptor Activation Generates Gamma Band Input To Cholinergic And Serotonergic Arousal System Neurons And Drives An Intrinsic Ca(2+)-Dependent Resonance In Ldt And Ppt Cholinergic Neurons, Masaru Ishibashi, Iryna Gumenchuk, Bryan Kang, Catherine Steger, Elizabeth Lynn, Nancy Molina, Leonard M. Eisenberg, Christopher S. Leonard
NYMC Faculty Publications
A hallmark of the waking state is a shift in EEG power to higher frequencies with epochs of synchronized intracortical gamma activity (30-60 Hz) - a process associated with high-level cognitive functions. The ascending arousal system, including cholinergic laterodorsal (LDT) and pedunculopontine (PPT) tegmental neurons and serotonergic dorsal raphe (DR) neurons, promotes this state. Recently, this system has been proposed as a gamma wave generator, in part, because some neurons produce high-threshold, Ca(2+)-dependent oscillations at gamma frequencies. However, it is not known whether arousal-related inputs to these neurons generate such oscillations, or whether such oscillations are ever transmitted to neuronal …
Process Improvement Consulting Teams: Creating An Undergraduate Capstone Experience, Eileen Steinle Alexander, Frederick Browne
Process Improvement Consulting Teams: Creating An Undergraduate Capstone Experience, Eileen Steinle Alexander, Frederick Browne
Faculty Scholarship
No abstract provided.
Investigating The Role Of Hydrogen Sulfide In The Survival, Growth And Angiogenic Potential Of Clear Cell Renal Cell Carcinoma Cell Lines And Xenografts, Eric Sonke
Electronic Thesis and Dissertation Repository
Clear cell renal cell carcinoma (ccRCC) is characterized by Von Hippel-Lindau (VHL)-deficiency, resulting in pseudohypoxic, angiogenic and glycolytic tumours. Hydrogen sulfide (H2S) is an endogenously-produced gasotransmitter that accumulates under hypoxia and has been shown to be pro-angiogenic and cytoprotective in cancer. It was hypothesized that H2S levels are elevated in VHL-deficient ccRCC, contributing to survival, metabolism, and angiogenesis. Using H2S-specific probes, it was found that H2S levels were higher in VHL-deficient ccRCC cell lines compared to cells with wild-type VHL. Inhibition of H2S-producing enzymes could reduce the proliferation, metabolism …
Questionable Validity Of The Catheter-Associated Urinary Tract Infection Metric Used For Value-Based Purchasing, Lindsay E. Calderon, Kevin T. Kavanagh, Mara K. Rice
Questionable Validity Of The Catheter-Associated Urinary Tract Infection Metric Used For Value-Based Purchasing, Lindsay E. Calderon, Kevin T. Kavanagh, Mara K. Rice
Biological Sciences Faculty and Staff Research
Catheter-associated urinary tract infections (CAUTIs) occur in 290,000 US hospital patients annually, with an estimated cost of $290 million. Two different measurement systems are being used to track the US health care system's performance in lowering the rate of CAUTIs. Since 2010, the Agency for Healthcare Research and Quality (AHRQ) metric has shown a 28.2% decrease in CAUTI, whereas the Centers for Disease Control and Prevention metric has shown a 3%-6% increase in CAUTI since 2009. Differences in data acquisition and the definition of the denominator may explain this discrepancy. The AHRQ metric analyzes chart-audited data and reflects both catheter …
From Wanted To Weeds: A Natural History Of Some Of New England’S Introduced Plants, Jessamy R. Luthin
From Wanted To Weeds: A Natural History Of Some Of New England’S Introduced Plants, Jessamy R. Luthin
Maine History
When the Europeans first colonized New England they initiated the process of transforming the landscape into something more familiar. In order to ensure access to food and medicine and recreate the pastoral landscape of the Old World they brought with them a variety of known plant species for cultivation. With time, shifts in medical practice, agriculture, food preservation, and dietary preferences, reliance on these plants declined. As knowledge of these plant species disappeared from popular consciousness, so too did they disappear into the wilds of America, exploiting new found ecological niches, and becoming New England’s naturalized flora. Human labor was …
Iarc Monographs: 40 Years Of Evaluating Carcinogenic Hazards To Humans, Neil Pearce, Aaron Blair, Paolo Vineis, Wolfgang Ahrens, Aage Andersen, Melissa J. Perry, +Several Additional Authors
Iarc Monographs: 40 Years Of Evaluating Carcinogenic Hazards To Humans, Neil Pearce, Aaron Blair, Paolo Vineis, Wolfgang Ahrens, Aage Andersen, Melissa J. Perry, +Several Additional Authors
Environmental and Occupational Health Faculty Publications
Background: Recently, the International Agency for Research on Cancer (IARC) Programme for the Evaluation of Carcinogenic Risks to Humans has been criticized for several of its evaluations, and also for the approach used to perform these evaluations. Some critics have claimed that failures of IARC Working Groups to recognize study weaknesses and biases of Working Group members have led to inappropriate classification of a number of agents as carcinogenic to humans.
Objectives: The authors of this Commentary are scientists from various disciplines relevant to the identification and hazard evaluation of human carcinogens. We examined criticisms of the IARC classification process …
Klf4-Sqstm1/P62-Associated Prosurvival Autophagy Contributes To Carfilzomib Resistance In Multiple Myeloma Models., Irene Riz, Teresa S. Hawley, Robert G. Hawley
Klf4-Sqstm1/P62-Associated Prosurvival Autophagy Contributes To Carfilzomib Resistance In Multiple Myeloma Models., Irene Riz, Teresa S. Hawley, Robert G. Hawley
Anatomy and Regenerative Biology Faculty Publications
Multiple myeloma (MM) is an incurable clonal plasma cell malignancy. Because of a high rate of immunoglobulin synthesis, the endoplasmic reticulum of MM cells is subjected to elevated basal levels of stress. Consequently, proteasome inhibitors, which exacerbate this stress by inhibiting ubiquitin-proteasome-mediated protein degradation, are an important new class of chemotherapeutic agents being used to combat this disease. However, MM cells still develop resistance to proteasome inhibitors such as carfilzomib. Toward this end, we have established carfilzomib-resistant derivatives of MM cell lines. We found that resistance to carfilzomib was associated with elevated levels of prosurvival autophagy, and Kruppel-like factor 4 …
Mala Lā’Au Lapa’Au: Preserving The Hawaiian ‘Āina And Mo’Omehue, Sandra Fogg
Mala Lā’Au Lapa’Au: Preserving The Hawaiian ‘Āina And Mo’Omehue, Sandra Fogg
Senior Honors Projects
The study of medicinal plants in the western world tends to focus on the isolation and elucidation of natural products that have bioactive characteristics and potential for pharmaceutical formulation. However, the utilization of medicinal plants in cultures that still practice ancient medicine, such as Hawai’i and other Pacific Island nations, involves the use of whole plant parts in conjunction with spiritual rituals to heal illnesses and ailments. In order to gather a different perspective of the use of plants in medicine, a diverse investigation of “Lā’au Lapa’au,” or the Hawaiian art of healing through the use of plants and spiritual …
Iarc Monographs: 40 Years Of Evaluating Carcinogenic Hazards To Humans, Neil E. Pearce, Aaron Blair, Paolo Vineis, Wolfgang Ahrens, Aage Andersom, Josep M. Anto, Bruce K. Armstrong, Andrea A. Baccarelli, Frederick A. Beland, Amy Berrington, Pier Alberto Bertazzi, Linda S. Birnbaum, Ross C. Brownson, John R. Bucher, Kenneth P. Cantor, Elisabeth Cardis, John W. Cherrie, David C. Christiani, Pierluigi Cocco, David Coggon, Pietro Comba, Paul A. Demers, John M. Dement, Jeroen Douwes, Ellen A. Eisen, Lawrence S. Engel, Richard A. Fenske, Lora E. Fleming, Tony Fletcher, Elizabeth Fontham, Francesco Forastiere, Rainer Frentzel-Beyme, Lin Fritschi, Michel Gerin, Marcel Goldberg, Philippe Grandjean, Tom K. Grimsrud, Per Gustavsson, Andy Haines, Patricia Hartge, Johnni Hansen, Michael Hauptmann, Dick Heederik, Kari Hemminki, Denis Hemon, Irva Hertz-Picciotto, Jane A. Hoppin, James Huff, Bengt Jarvholm, Daehee Kang, Margaret R. Karagas
Iarc Monographs: 40 Years Of Evaluating Carcinogenic Hazards To Humans, Neil E. Pearce, Aaron Blair, Paolo Vineis, Wolfgang Ahrens, Aage Andersom, Josep M. Anto, Bruce K. Armstrong, Andrea A. Baccarelli, Frederick A. Beland, Amy Berrington, Pier Alberto Bertazzi, Linda S. Birnbaum, Ross C. Brownson, John R. Bucher, Kenneth P. Cantor, Elisabeth Cardis, John W. Cherrie, David C. Christiani, Pierluigi Cocco, David Coggon, Pietro Comba, Paul A. Demers, John M. Dement, Jeroen Douwes, Ellen A. Eisen, Lawrence S. Engel, Richard A. Fenske, Lora E. Fleming, Tony Fletcher, Elizabeth Fontham, Francesco Forastiere, Rainer Frentzel-Beyme, Lin Fritschi, Michel Gerin, Marcel Goldberg, Philippe Grandjean, Tom K. Grimsrud, Per Gustavsson, Andy Haines, Patricia Hartge, Johnni Hansen, Michael Hauptmann, Dick Heederik, Kari Hemminki, Denis Hemon, Irva Hertz-Picciotto, Jane A. Hoppin, James Huff, Bengt Jarvholm, Daehee Kang, Margaret R. Karagas
Dartmouth Scholarship
Background: Recently, the International Agency for Research on Cancer (IARC) Programme for the Evaluation of Carcinogenic Risks to Humans has been criticized for several of its evaluations, and also for the approach used to perform these evaluations. Some critics have claimed that failures of IARC Working Groups to recognize study weaknesses and biases of Working Group members have led to inappropriate classification of a number of agents as carcinogenic to humans.
Objectives: The authors of this Commentary are scientists from various disciplines relevant to the identification and hazard evaluation of human carcinogens. We examined criticisms of the IARC classification process …
Factors Associated With Belief In Conspiracies About Hiv/Aids Among Hiv-Positive African-American Patients, Andrew A. Zekeri, Youssouf Diabate
Factors Associated With Belief In Conspiracies About Hiv/Aids Among Hiv-Positive African-American Patients, Andrew A. Zekeri, Youssouf Diabate
Professional Agricultural Workers Journal
Abstract
The purpose of this study is to examine factors associated with belief in conspiracies about HIV/AIDS among HIV-Positive African American patients. Survey data were collected from 256 African American patients living with HIV/AIDS attending two HIV clinics in Montgomery and Dothan, Alabama. The study used multiple regression analysis to examine how sociodemographic factors contribute to belief in conspiracies about HIV/AIDS. Education and age were significantly related to belief in conspiracies about HIV/AIDS among men and women. Beliefs in conspiracies about HIV/AIDS may be a barrier to HIV prevention among African Americans. Public health officials should work toward obtaining the …
The Biological Consequences Of Kaolin Geophagia, Deloris Alexander, Desire Richardson, Lakisha Odom, Kara Cromwell, Dejuana Grant, Micoya Myers, Eddy Cadet, Hamid Mahama, Vijaya Rangari, Ralphenia Pace, Ramble Ankumah, Kokoasse Kpomblekou-A, Curtis Fluker
The Biological Consequences Of Kaolin Geophagia, Deloris Alexander, Desire Richardson, Lakisha Odom, Kara Cromwell, Dejuana Grant, Micoya Myers, Eddy Cadet, Hamid Mahama, Vijaya Rangari, Ralphenia Pace, Ramble Ankumah, Kokoasse Kpomblekou-A, Curtis Fluker
Professional Agricultural Workers Journal
Abstract
Kaolin geophagia is associated with the relief of gastrointestinal distress, but it may also cause adverse health effects on the body. This study was designed to: assess kaolin composition; test if 129SvEv mice would consume kaolin and determine the consequences of consumption; and assess rotational stress modulation of consumption. Thirteen kaolin samples were purchased from Alabama and Georgia stores. Chemical and physical properties were characterized for each sample using a Munsell chart, pH meter, Energy Dispersive Spectroscopy, Transmission Electron Microscopy, Visible Near-InfraRed Spectra, and Inductively Coupled Plasma-Optical Emission Spectrometry. Kaolin was then given to mice as food supplements and …
Thyroxine Replacement In Patients On Parenteral Nutrition: A Clinical Conundrum, Abdul Rehman, Noor Ul-Ain Baloch, Muhammad Awais
Thyroxine Replacement In Patients On Parenteral Nutrition: A Clinical Conundrum, Abdul Rehman, Noor Ul-Ain Baloch, Muhammad Awais
Department of Biological & Biomedical Sciences
No abstract provided.
Galectin-1: A Biomarker Of Surgical Stress In Murine Model Of Cardiac Surgery, Satwat Hashmi, Suhail Al-Salam
Galectin-1: A Biomarker Of Surgical Stress In Murine Model Of Cardiac Surgery, Satwat Hashmi, Suhail Al-Salam
Department of Biological & Biomedical Sciences
Galectin-1 (GAL-1) belongs to the family of β-galactoside-binding lectins. It regulates cell-cell and cell-matrix interactions, the immune response, apoptosis, cell cycle, RNA splicing and neoplastic transformation. We investigate the effect of heart manipulation secondary to cardiac surgery on the level of GAL-1 in murine heart and plasma. Male C57B6/J mice were used for adopted model of cardiac surgery. Heart samples were processed for immunohistochemical and immunofluorescent labeling, Enzyme linked immunosorbent assay and quantitative RT-PCR to identify GAL-1 levels in the heart and plasma during the first 24 hours following cardiac surgery. There is significant increase of GAL-1 in the LV …
Understanding Childhood Hunger: A Qualitative Look At The Issues Hindering Progress In The United States, Samantha Kropp
Understanding Childhood Hunger: A Qualitative Look At The Issues Hindering Progress In The United States, Samantha Kropp
Honors Theses
This thesis examines childhood hunger as roughly 1 in 5 kids live in households that struggle to put food on the table. These children experience physical problems as a result of their food instability, but this problem is connected to other personal and societal issues, such as poor education. To understand how hunger affects children, this study began with a historical analysis of the past 60 years of government supported programs and policies, such as the school breakfasts and summer lunch programs. Four interviews were conducted with different experts in the field, specifically three individuals from a prominent national non‐profit …
Fecal Volatile Organic Ccompound Profiles From White-Tailed Deer (Odocoileus Virginianus) As Indicators Of Mycobacterium Bovis Exposure Or Mycobacterium Bovis Bacille Calmette-Guerin (Bcg) Vaccination, Randal S. Stahl, Christine K. Ellis, Pauline Nol, W. Ray Waters, Kurt C. Vercauteren
Fecal Volatile Organic Ccompound Profiles From White-Tailed Deer (Odocoileus Virginianus) As Indicators Of Mycobacterium Bovis Exposure Or Mycobacterium Bovis Bacille Calmette-Guerin (Bcg) Vaccination, Randal S. Stahl, Christine K. Ellis, Pauline Nol, W. Ray Waters, Kurt C. Vercauteren
USDA Wildlife Services: Staff Publications
White-tailed deer (Odocoileus virginianus) serve as a reservoir for bovine tuberculosis, caused by Mycobacterium bovis, and can be a source of infection in cattle. Vaccination with M. bovis Bacille Calmette Guerin (BCG) is being considered for management of bovine tuberculosis in deer. Presently, no method exists to non-invasively monitor the presence of bovine tuberculosis in deer. In this study, volatile organic compound profiles of BCG-vaccinated and non-vaccinated deer, before and after experimental challenge with M. bovis strain 95–1315, were generated using solid phase microextraction fiber head-space sampling over suspended fecal pellets with analysis by gas chromatography/mass spectrometry. …
The Cognition-Enhancing Effects Of Psychostimulants Involve Direct Action In The Prefrontal Cortex, Robert C. Spencer, David M. Devilbiss, Craig Berridge
The Cognition-Enhancing Effects Of Psychostimulants Involve Direct Action In The Prefrontal Cortex, Robert C. Spencer, David M. Devilbiss, Craig Berridge
Rowan-Virtua School of Osteopathic Medicine Faculty Scholarship
Psychostimulants are highly effective in the treatment of attention-deficit/hyperactivity disorder. The clinical efficacy of these drugs is strongly linked to their ability to improve cognition dependent on the prefrontal cortex (PFC) and extended frontostriatal circuit. The procognitive actions of psychostimulants are only associated with low doses. Surprisingly, despite nearly 80 years of clinical use, the neurobiology of the procognitive actions of psychostimulants has only recently been systematically investigated. Findings from this research unambiguously demonstrate that the cognition-enhancing effects of psychostimulants involve the preferential elevation of catecholamines in the PFC and the subsequent activation of norepinephrine α2 and dopamine D1 receptors. …