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Full-Text Articles in Life Sciences

The Kinetic Signatures Of Antibody Binding To M. Genitalium Adhesin Protein Fragments, Margaret C. Lunn Jun 2020

The Kinetic Signatures Of Antibody Binding To M. Genitalium Adhesin Protein Fragments, Margaret C. Lunn

Honors Projects

Mycoplasma genitalium is a sexually-transmitted bacterial pathogen that persists in patients by adherence to cells through matrix glycoproteins and evasion of host antibodies. The MgpB and MgpC adherence proteins consist of variable and conserved regions. Variable regions undergo antigenic variation to avoid specific antibodies. However, the C-terminus (MgpB-4a) does not vary, is highly immunogenic, and antibodies to this region inhibit attachment and promote bacterial killing in vitro. To better understand how M. genitalium avoids clearance by antibodies to MgpB-4a in vivo we used surface plasmon resonance (SPR) to measure kinetic values of binding events. Binding of polyclonal rabbit antibodies (3935 …


Review Of The Latest Trends In Transplantation Immunology And Its Role In Mortality Reduction, Vivian Adedoye May 2020

Review Of The Latest Trends In Transplantation Immunology And Its Role In Mortality Reduction, Vivian Adedoye

Honor’s College Freeman Research Journal

Transplantation immunology deals with the process of moving cells, tissues, or organs, from one site to another, either within the same person or between a donor and a recipient. If an organ system fails, or becomes damaged because of disease or injury, it can be replaced with a healthy organ or tissue from a donor. The process of transplantation has become increasingly popular due to its life saving benefit. In 2015 /2016 4601 patients' lives were saved or improved by an organ transplant in the United Kingdom alone. Kidney transplants are the most common organ transplant followed by liver and …


Haemonchus Contortus Antigen Identification And Use Of Tropomyosin In Ovine Vaccine Development, Brynnan P. Russ Jan 2020

Haemonchus Contortus Antigen Identification And Use Of Tropomyosin In Ovine Vaccine Development, Brynnan P. Russ

Graduate Theses, Dissertations, and Problem Reports

Globally, the small ruminant industry loses hundreds of millions of dollars due to parasitism by the gastrointestinal nematode Haemonchus contortus. This parasite feeds on blood in the host’s abomasum leading to disease including anemia, hypoproteinemia, lethargy, and death. There have been exhaustive efforts to manage this parasite including different management applications, anthelmintic treatment, and now integration of resistance genetics into a flock. Like antibiotics, overuse of anthelmintics has led to resistance of H. contortus to these drugs. Therefore, other methods of control are the main focuses of many research initiatives. St. Croix are a resistant breed of sheep that mount …


Germinal Center B Cell Expression Of Aire Regulates Antibody Diversification And Autoimmunity, Jordan Zheng Zhou Jan 2020

Germinal Center B Cell Expression Of Aire Regulates Antibody Diversification And Autoimmunity, Jordan Zheng Zhou

Wayne State University Dissertations

B cells are a unique subset of immune cells that, in response to antigen, diversify their antibody repertoire to generate progressively higher affinity antibodies of different isotypes through the processes of affinity maturation/somatic hypermutation (SHM) and class switch recombination (CSR). One of the major sites in which this diversification occurs is in T cell dependent microanatomical structures known as germinal centers (GC). Here, we find that GC B cells express the protein, autoimmune regulator (Aire) in a CD40 dependent manner. In these cells, Aire interacts with activation induced cytidine deaminase (AID), the protein responsible for initiating the processes of diversification …


Single-Domain Alpaca Antibodies That Disrupt Ricin Toxin Uptake And Trafficking In Mammalian Cells, Amanda Yee Poon Jan 2020

Single-Domain Alpaca Antibodies That Disrupt Ricin Toxin Uptake And Trafficking In Mammalian Cells, Amanda Yee Poon

Legacy Theses & Dissertations (2009 - 2024)

Ricin is a member of the ribosome-inactivating protein (RIP) family of toxins found throughout the plant and microbial worlds. In its mature form, ricin is a 65 kDa glycoprotein consisting of two subunits, RTA and RTB, joined by a single disulfide bond. RTA (267 amino acids) is an RNA N-glycosidase that mediates the depurination of a universally conserved residue within the Sarcin-ricin loop (SRL) ribosomal RNA element. RTB is a galactose-/N-acetylgalactosamine-specific lectin that facilitates attachment, endocytosis, and intracellular trafficking of ricin in mammalian cells. Following endocytosis, ricin is routed to the trans-Golgi network (TGN) and then shuttled to the endoplasmic …


Adaptation Of Vibrio Cholerae O1 To Protective, Lipopolysaccharide-Specific Antibodies In The Intestinal Lumen, Danielle Elizabeth Baranova Jan 2020

Adaptation Of Vibrio Cholerae O1 To Protective, Lipopolysaccharide-Specific Antibodies In The Intestinal Lumen, Danielle Elizabeth Baranova

Legacy Theses & Dissertations (2009 - 2024)

The outer membrane (OM) of Gram-negative enteric pathogens like Vibrio cholerae is a barrier against host defense factors, as well as a sensor of physical and chemical stimuli that the bacteria encounter in the gastrointestinal tract. The OM is also the primary target of the mucosal immune response, which consists of secretory antibodies primarily directed against lipopolysaccharide (LPS). ZAC-3 is a monoclonal antibody (MAb) that targets the conserved core/lipid A region of LPS of the pandemic V. cholerae O1 serotype. In a neonatal mouse model, passively administered ZAC-3 IgG has been shown to reduce the ability of V. cholerae to …