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Articles 1 - 8 of 8
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The Effects Of Hemoglobin-Based Oxygen Carriers On Mean Arterial Pressure, Arteriolar Diameter, And Nitric Oxide In The Microcirculation, Veronique C. Hionis
The Effects Of Hemoglobin-Based Oxygen Carriers On Mean Arterial Pressure, Arteriolar Diameter, And Nitric Oxide In The Microcirculation, Veronique C. Hionis
Theses and Dissertations
In the US today, blood transfusion is safer than ever. Nevertheless, the century-old quest for a suitable blood substitute persists. The elimination of unwanted side effects, especially transfusion-transmitted diseases, the problems and high cost factor involved in collecting and storing human blood, the pending worldwide shortages, and the need for compatibility testing are the driving forces contributing towards the development of blood substitutes. The leading research is focusing on hemoglobin-based oxygen carriers (HBOCs), which are limited in clinical application due to the pressor effect they induce. In this study, the mechanisms through which HBOCs affect mean arterial pressure (MAP), arteriolar …
The Effect Of Adding Drag-Reducing Polymers To Resuscitation Fluid During Hemorrhagic Shock On Skeletal Muscle Microcirculation, Geoffrey C. Alexander
The Effect Of Adding Drag-Reducing Polymers To Resuscitation Fluid During Hemorrhagic Shock On Skeletal Muscle Microcirculation, Geoffrey C. Alexander
Theses and Dissertations
Previous studies have shown an increase in survival when a minute amount of drag-reducing polymers were added to a resuscitation fluid. The purpose of this investigation was to examine the effect of adding a minute amount of the drag-reducing polymer polyethylene glycol to a resuscitation fluid, on the microcirculation of skeletal muscle during a volume-controlled hemorrhage model. The spinotrapezius muscle in twelve male Sprague Dawley rats was exteriorized for microvascular measurements of the arterioles. The diameters of the three levels of arterioles, interstitial fluid PO2, and RBC velocity in the feed arteriole were measured. Flow in the feed arteriole was …
Isolation Of Mesenchymal Stem Cells Derived From Adult Bone Marrow And Umbilical Cord Blood And Their Potential To Differentiate Into Osteoblasts, Andrew P. Pacitti
Isolation Of Mesenchymal Stem Cells Derived From Adult Bone Marrow And Umbilical Cord Blood And Their Potential To Differentiate Into Osteoblasts, Andrew P. Pacitti
Theses and Dissertations
The demand for treatment strategies of musculoskeletal tissues is continuously growing, especially considering the increasing number of elderly people with degenerative diseases of the skeletal system. Despite major strides in the field of bone regenerative medicine during the years, current therapies, such as bone grafts, still have several limitations. Multipotent stem cells, such as mesenchymal stem cells (MSCs) are promising candidates for tissue repair because of their differentiation potential and their capacity to undergo extensive replication. However, isolating a homogeneous population of MSCs from multiple sources is an area that needs to be addressed. Also, the knowledge regarding the mechanisms …
Effect Of Nitric Oxide On Oxygen Consumption Of Skeletal Muscle, Christina Lyn Cox
Effect Of Nitric Oxide On Oxygen Consumption Of Skeletal Muscle, Christina Lyn Cox
Theses and Dissertations
Mammalian cells require a continuous and sufficient supply of oxygen to carry out their functions. The oxygen pathway has an overall direction taking O2 from the air to the mitochondria, which is a result of the mitochondrial O2 consumption (VO2) NO various effects on the mitochondria: at low concentrations for short periods NO specifically and irreversibly inhibits cytochrome c and reversibly inhibits cytochrome c oxidase, to decrease VO2. Thus, NO can modulate VO2 of skeletal muscle. The purpose of the present study was to measure VO2 of the rat spinotrapezius muscle under conditions of altered NO. The methods used provide …
Early Mediators Of Cutaneous Ischemia Reperfusion Injury: A Mouse Model, Christopher Rogers Pruitt
Early Mediators Of Cutaneous Ischemia Reperfusion Injury: A Mouse Model, Christopher Rogers Pruitt
Theses and Dissertations
Chronic tissue injuries present an enormous problem to both patients and healthcare professionals, and yet little is definitively known as to the underlying pathophysiology. While there are numerous comorbidities associated with these wounds, a unifying theme has been proposed to be the repetitive incidence of ischemia reperfusion injury.A mouse model of cyclic ischemia reperfusion was employed to examine the initiation events in the pathology of chronic wounds. Mice were subjected to eight hours of magnetic skin compression via four cycles of two-hours ischemia and thirty minutes of reperfusion. The presence of neutrophil markers of oxidative stress and inflammation such as …
Functional Consequences Of Matrix Metalloproteinase-1 Over-Expression In Human Gliomas, Emily Mullet
Functional Consequences Of Matrix Metalloproteinase-1 Over-Expression In Human Gliomas, Emily Mullet
Theses and Dissertations
Malignant brain tumors are among the deadliest of human cancers. Despit recent advancements in conventional therapies, glioblastomas remain incurable, largel y due to their ability to invade surrounding tissue. Matrix metalloproteinases are thought to contribute to the invaseive phenotype of human gliomas. Absent in normal brain, matrix metalloproteinase-1 (MMP-1) has been shown to be present in gliomas, and in particular in glioblastoma multiforme (GBM). To begin to examine the role of MMP-1 in these tumore, two human glioma cell lines were stably transfected with MMP-1 cDNA. Confirmation of MMP-1 over-expression in these cells was achieved through real-time PCR and Western …
Comparison Of Leukocyte Classes Most Likely To Cause Vascular Dysfunction In Preeclampsia, Kristen Anne Cadden
Comparison Of Leukocyte Classes Most Likely To Cause Vascular Dysfunction In Preeclampsia, Kristen Anne Cadden
Theses and Dissertations
Leukocytes are activated in women with preeclampsia, but the class of leukocyte most likely to cause vascular dysfunction is not known. We hypothesized that neutrophils may be the class of leukocyte most involved in causing this dysfunction because neutrophils are the most abundant of the leukocytes and their numbers increase during pregnancy. In this study we compared vascular infiltration of neutrophils (CD66b) with monocytes/macrophages (CD14) and lymphocytes (CD99) in normal non-pregnant women (NNP), normal pregnant women (NP), and preeclamptic women (PE). There was no significant difference in the infiltration of lymphocytes into the maternal vasculature in PE as compared to …
Anatomical Bases For Auditory Projections To Suprasylvian Visual Areas In The Cat Cerebral Cortex, Giriaj K. Sharma
Anatomical Bases For Auditory Projections To Suprasylvian Visual Areas In The Cat Cerebral Cortex, Giriaj K. Sharma
Theses and Dissertations
How the neural representations of different sensory modalities transition from one to another is an unexplored issue of cortical organization. The present experiments addressed this problem by examining auditory projections to the lateral suprasylvian visual area (LSS) of the cat using neuroanatomical tract tracing methods. Injections of tracer (Biotinylated Dextran Amine, BDA) were made into defined areas of the cat auditory cortex. Following transport and tissue processing, a light microscope with a digitizing stage was used to visualize and plot labeled auditory projections to the LSS. The results showed that all auditory cortices tested demonstrated projections to a restricted portion …