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Circulatory and Respiratory Physiology Commons™
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Articles 1 - 5 of 5
Full-Text Articles in Circulatory and Respiratory Physiology
Endogenous Mechanisms Regulating Myeloid Cell Mediated Inflammation During Acute Lung Injuries, Nathaniel Berg
Endogenous Mechanisms Regulating Myeloid Cell Mediated Inflammation During Acute Lung Injuries, Nathaniel Berg
Dissertations and Theses (Open Access)
Acute lung injuries (ALI) can result from both direct insults (e.g. pneumonia or inhalation injury), or systemic conditions such as sepsis or trauma. Current treatment options for patients are limited to supportive care and novel approaches are urgently needed. Appreciating the role of excessive inflammation that underlies the pathophysiology of ALI, we sought to identify endogenous mechanisms that dampen inflammation. Here we investigated two pathways that worked to limit excessive pulmonary inflammation in myeloid cells using a mouse model of sepsis-associated ALI. In the first approach we screened for microRNAs during the recovery phase of ALI that could potentially regulate …
Alternative Polyadenylation Modulates Expression Of Pro-Fibrotic Proteins And Contributes To Lung Fibrosis, Junsuk Ko
Dissertations and Theses (Open Access)
Idiopathic pulmonary fibrosis (IPF) is a chronic lung disease which affects about 5 to 8 million individuals in the world. Despite the high prevalence, there is currently no cure for IPF, and the cause of this disease is still unclear. Our laboratory and collaborators have shown that nudix hydrolase 21 (NUDT21, which is also known as cleavage factor 25, CFIm25) is a key regulator of alternative polyadenylation (APA). NUDT21 depletion causes 3’UTR shortening via APA leading to enhanced mRNA stability and protein translation. This NUDT21 reduction promotes tumor growth in glioblastoma by enhancing expression of oncogenes. Cancer and IPF share …
Ankyrin-B And Mtor Complex 1 In The Regulation Of Electrical Activities In The Heart, Henry C. Wu, Henry C. Wu
Ankyrin-B And Mtor Complex 1 In The Regulation Of Electrical Activities In The Heart, Henry C. Wu, Henry C. Wu
Dissertations and Theses (Open Access)
The mammalian target of rapamycin complex 1 (mTORC1) activity is paramount in the regulation of electrical activities in the brain and the heart. In the brain, the tumor suppressor gene TSC2 encodes the protein product tuberin that interacts with hamartin to form a heterodimer Tuberous Sclerosis Complex (TSC) that regulates mTORC1. When TSC2 is disrupted, mTORC1 activity becomes dysregulated resulting in abnormal electrical activities in the brain manifesting in the form of epileptic seizures. In the heart, mTORC1 activity is triggered by a sustained increase in hemodynamic pressure causing the heart to electrically remodel. A likely candidate serving as the …
Delayed Thrombus Resolution And Fibroproliferative Vascular Wound Healing From Deficiency Of Type Iii Collagen: A Paradoxical Mechanism For Tissue Fragility, Amy J. Reid
Dissertations and Theses (Open Access)
Vascular Ehlers-Danlos syndrome is a heritable disease of connective tissue caused by mutations in COL3A1, conferring a tissue deficiency of type III collagen. Cutaneous wounds heal poorly in these patients, and they are susceptible to spontaneous and catastrophic rupture of expansible hollow organs like the gut, uterus, and medium-sized to large arteries, which leads to premature death. Although the predisposition for organ rupture is often attributed to inherent tissue fragility, investigation of arteries from a haploinsufficient Col3a1 mouse model (Col3a1+/-) demonstrates that mutant arteries withstand even supraphysiologic pressures comparably to wild-type vessels. We hypothesize that injury …
Osteopontin And Cadherin 11 Are Novel Mediators And Drug Targets For Chronic Lung Diseases, Daniel J. Schneider
Osteopontin And Cadherin 11 Are Novel Mediators And Drug Targets For Chronic Lung Diseases, Daniel J. Schneider
Dissertations and Theses (Open Access)
Chronic lung diseases (CLDs) are a considerable source of morbidity and mortality and are thought to arise from dysregulation of normal wound healing processes. An aggressive, feature of many CLDs is pulmonary fibrosis (PF) and is characterized by excess deposition of extracellular matrix (ECM) proteins from myofibroblasts in airways. However, factors regulating myofibroblast biology are incompletely understood. Proteins in the cadherin family contribute epithelial to mesenchymal transition (EMT), a suggested source of myofibroblasts. Cadherin 11 (CDH11) contributes to developmental and pathologic processes that parallel those seen in PF and EMT. Utilizing Cdh11 knockout (Cdh11 -/-) mice, the goal of this …