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Articles 1 - 13 of 13
Full-Text Articles in Molecular Biology
Mechanisms Of The Anti-Pneumococcal Function Of C-Reactive Protein, Toh B. Gang
Mechanisms Of The Anti-Pneumococcal Function Of C-Reactive Protein, Toh B. Gang
Electronic Theses and Dissertations
Human C-reactive protein (CRP) increases survival of and decreases bacteremia in mice infected with Streptococcus pneumoniae. Such protection of mice against pneumococcal infection is seen only when CRP is administered into mice 6 hours before to 2 hours after the injection of pneumococci, but not when CRP is given to mice at a later time. Our first aim was to define the mechanism of CRP-mediated initial protection of mice against infection. It was proposed that CRP binds to phosphocholine (PCh) moieties present in the cell wall and activates the complement system on the pneumococcal surface that kills the pathogen. …
Human Adenovirus E1a Binds And Retasks Cellular Hbre1, Blocking Interferon Signalling And Activating Virus Early Gene Transcription, Gregory J. Fonseca
Human Adenovirus E1a Binds And Retasks Cellular Hbre1, Blocking Interferon Signalling And Activating Virus Early Gene Transcription, Gregory J. Fonseca
Electronic Thesis and Dissertation Repository
Upon infection, human adenovirus (HAdV) must block interferon signaling and activate the expression of its early genes to reprogram the cellular environment to support virus replication. During the initial phase of infection, these processes are orchestrated by the first HAdV gene expressed during infection, early region 1A (E1A). E1A binds and appropriates components of the cellular transcriptional machinery to modulate cellular gene transcription and activate viral early genes transcription. We have identified hBre1/RNF20 as a novel target of E1A. hBre1 is an E3 ubiquitin ligase which acts with the Ube2b E2 conjugase and accessory factors RNF40 and WAC1 to monoubiquitinate …
Analysis Of The Chondroitinase Operon Of Flavobacterium Columnare, Erin L. Sorlien
Analysis Of The Chondroitinase Operon Of Flavobacterium Columnare, Erin L. Sorlien
Senior Honors Projects
Analysis of the chondroitinase operon of Flavobacterium columnare
Erin Sorlien
Major
Cell and Molecular Biology, Chemistry
Advisor
Dr. David R. Nelson
Date
May 2, 2013
Keywords
Flavobacterium columnare, columnaris disease, chondroitin AC lyase, complementation, csl operon
Abstract
Flavobacterium columnare, an opportunistic bacterial pathogen of fish, is the causative agent of columnaris disease (CD). The bacterium is a Gram-negative rod that exhibits gliding motility and avidly forms biofilms. CD affects both wild and cultured freshwater fish, and continues to cause large economic losses to the fish farming industry. According to an investigation conducted by the National Animal Health Monitoring System, CD …
Evolutionary And Molecular Analysis Of Conserved Vertebrate Immunity To Fungi, Erin Carter
Evolutionary And Molecular Analysis Of Conserved Vertebrate Immunity To Fungi, Erin Carter
Honors College
The innate immune system is highly conserved amongst all multicellular organisms. Yet a constant battle exists between host cells and pathogens due to the rapid evolution of immune system components. Functional genomics and in silico methods can be employed to elucidate the evolutionary patterns of vertebrate immunity to pathogenic fungi such as Candida albicans, an opportunistic fungal pathogen that can cause lethal candidiasis in the immunocompromised. Mammals such as humans and mice possess conserved C-type lectin receptors that recognize the C. albicans cell wall. However, these receptors have not been identified in fish. Here I describe how we identified potential …
Cellular Adaptation Of Macrophages To Anthrax Lethal Toxin-Induced Pyroptosis Via Epigenetic Mechanisms, Chae Young Han
Cellular Adaptation Of Macrophages To Anthrax Lethal Toxin-Induced Pyroptosis Via Epigenetic Mechanisms, Chae Young Han
Electronic Thesis and Dissertation Repository
Cellular adaptation to microbial stresses has been demonstrated in several cell types. Macrophages (MФ) are sentinel immune cells fending off invading microbes. Anthrax lethal toxin (LeTx) is a key virulence factor released by Bacillus anthracis that causes rapid cell death, pyroptosis. A small number of RAW246.7 macrophages (~4%) exposed to a non-lethal dose of LeTx become resistant to LeTx-induced pyroptosis for ~ 4 weeks, termed “toxin-induced resistance (TIR)”. Here, I showed that high levels of DNA methyl transferase1 (DNMT1) expression were maintained although global genomic methylation levels were not high in TIR. TIR cells treated with the DNMT inhibitor 5-azacitidine …
Phi X 174, David J. Hall
Phi X 174, David J. Hall
Infectious Pathogens
Phi X 174 database number # 1CD3. Phi X 174 is a virus that infects bacteria and was the first DNA-based genome to be sequenced in 1977. This bacteriophage has a [+] circular single-stranded DNA genome. The assembly of the capsid has been successfully done in vitro and is the focus of many studies on self-assembly, drug delivery and nanotechnology.
Human Papilloma Virus 16, David J. Hall
Human Papilloma Virus 16, David J. Hall
Infectious Pathogens
Human Papilloma virus 16, database# 1DZL Infection by most papillomaviruses is either asymptomatic or causes small benign tumors, known as papillomas or warts (e.g. human papillomavirus HPV6 or HPV11). Papillomas caused by some types, however, such as human papillomaviruses 16 and 18, carry a risk of becoming cancerous. Human papilloma virus is a non-enveloped, double stranded, circular DNA virus.
Dengue Virus, David J. Hall
Dengue Virus, David J. Hall
Infectious Pathogens
Dengue virus, database # 1THD Dengue fever, is an infectious tropical disease caused by the dengue virus and transmitted by mosquito. Symptoms include fever, headache, muscle and joint pains, and a characteristic skin rash that is similar to measles. In a small proportion of cases the disease develops into the life-threatening dengue hemorrhagic fever. Dengue is a positive strand RNA virus that is part of the flavivirus family. Dengue is an enveloped virus meaning it has a nucleocapsid protecting the RNA and the nucleocapsid is surrounded by lipids (hence the name enveloped).
Hepatitis B, David J. Hall
Hepatitis B, David J. Hall
Infectious Pathogens
Hepatitis B, database # 2g33. Hepatitis B is an infectious inflammatory illness of the liver caused by the hepatitis B virus (HBV). Hepatitis B virus (HBV) is a member of the Hepadnavirus family.The virus particle, (virion) consists of an outer lipid envelope and an icosahedral nucleocapsid core composed of protein. These virions are 42 nM in diameter. The nucleocapsid encloses the viral DNA and a DNA polymerase that has reverse transcriptase activity.
Epigenetic Modifiers To Augment The Immunogenicity Of Chronic Lymphocytic Leukemia, Jason A. Dubovsky
Epigenetic Modifiers To Augment The Immunogenicity Of Chronic Lymphocytic Leukemia, Jason A. Dubovsky
USF Tampa Graduate Theses and Dissertations
Cancer cells employ a litany of immunosuppressive and immunevasive strategies to avoid detection and elimination by the various arms of the innate and adaptive immune system. Many hematologic and solid tumors progressively develop a specialized microenvironment which promotes tissue restructuring inflammation while masking the immune signature of the tumor cells themselves. Chronic lymphocytic leukemia, a malignancy of mature B lymphocytes must constantly balance on the precipice of immune recognition. A mature antigen presenting cell themselves, CLL clonal growth is dependent on the very interactions which, if effective, could potentially lead to their demise. To circumvent this, CLL clones set up …
The Role Of P38 Mapk In The Aetiopathogenesis Of Psoriasis And Psoriatic Arthritis, Athanasios Mavropoulos, Eirini I. Rigopoulou, Christos Liaskos, Dimitrios P. Bogdanos, Lazaros I. Sakkas
The Role Of P38 Mapk In The Aetiopathogenesis Of Psoriasis And Psoriatic Arthritis, Athanasios Mavropoulos, Eirini I. Rigopoulou, Christos Liaskos, Dimitrios P. Bogdanos, Lazaros I. Sakkas
Biological Sciences Faculty Publications
The pathogenetic mechanisms responsible for the induction of immune-mediated disorders, such as psoriasis, remain not well characterized. Molecular signaling pathways are not well described in psoriasis, as well as psoriatic arthritis, which is seen in up to 40% of patients with psoriasis. Signaling pathway defects have long been hypothesized to participate in the pathology of psoriasis, yet their implication in the altered psoriatic gene expression still remains unclear. Emerging data suggest a potential pathogenic role for mitogen activated protein kinases p38 (p38 MAPK) extracellular signal-regulated kinase 1/2 (ERK1/2), and c-Jun N-terminal kinase (JNK) in the development of psoriasis. The data …
Giardia Lamblia: Regulation Of Cyst Production By Glycosphingolipids, Tavis Lyle Mendez
Giardia Lamblia: Regulation Of Cyst Production By Glycosphingolipids, Tavis Lyle Mendez
Open Access Theses & Dissertations
The diplomonad protist, Giardia lamblia, colonizes and replicates in the small intestine of mammals. In humans, Giardia infection (known as giardiasis) can be symptomatic or asymptomatic with the former being associated with fatty stool, abdominal pain, malnutrition, and weight loss. Both cell-mediated and humoral immune responses against Giardia infection are possible, and adaptive responses have been reported to be important for controlling the infection. Non-immune components such as secretory immunoglobulin, intestinal lipids, and bile acids also play significant roles in determining the severity of the infection by Giardia.
Giardia exists in two morphologic forms--trophozoites and cysts--and maintains a simple life …
The Transcriptional Regulation Of Flagellin-Induced Innate Protection Of The Cornea: Role Of Irf1 And Atf3, Gi Sang Yoon
The Transcriptional Regulation Of Flagellin-Induced Innate Protection Of The Cornea: Role Of Irf1 And Atf3, Gi Sang Yoon
Wayne State University Dissertations
Pre-exposure of the cornea to TLR5 ligand flagellin induces profound mucosal innate protection against infections by reprogramming gene expression. This study explored the flagellin-induced modifications of transcription factor expression and function, specifically of IRF1 and ATF3 in corneal epithelial cells to elucidate the transcriptional mechanisms underlying the protective function of flagellin on the cornea.
Initially we used Superarray to screen for transcription factors and identified Interferon Regulatory Factor (IRF) 1 and Activating Transcription Factor (ATF) 3 as the most drastically affected genes by flagellin pretreatment in P. aeruginosa challenged human corneal epithelial cells (CEC). However, flagellin pretreatment had opposite effects …