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Full-Text Articles in Medicine and Health Sciences
Neuroprotective Functions Of Docosahexaenoic Acid And Epidermal Fatty Acid Binding Protein, Manuel Luis Montero
Neuroprotective Functions Of Docosahexaenoic Acid And Epidermal Fatty Acid Binding Protein, Manuel Luis Montero
Loma Linda University Electronic Theses, Dissertations & Projects
Lipotoxicity (LTx) is involved in mostly every process of neuronal injury. Using NGFDPC12 cells we show that palmitic acid (PA) induces the expression of stress response genes HIF-1α and BNIP3, increases the accumulation of reactive oxygen species, and decreases cell viability by apoptosis. Inhibition of cathepsins does not rescue neurons from PA-LTx but inhibition of necroptosis and promotion of autophagy do. DHA decreases the expression of HIF-1α and BNIP3 and rescues PA-induced cell death by inhibiting apoptosis and necroptosis. Besides DHA stimulates the mRNA expression, phosphorylation and conjugation of autophagy controlling proteins. Inhibiting autophagy during DHA treatment decreases its capacity …
Vegf And Sympathetic Perivascular Nerves Contribute To Hypoxic Remodeling Of Ovine Cranial Arteries, Olayemi Olufikayo Adeoye
Vegf And Sympathetic Perivascular Nerves Contribute To Hypoxic Remodeling Of Ovine Cranial Arteries, Olayemi Olufikayo Adeoye
Loma Linda University Electronic Theses, Dissertations & Projects
Chronic hypoxia complicates many pregnancies and can result in postnatal pathologies that include compromised fetal cardiovascular structure and function. Mechanisms involved remain unclear. Because hypoxia increases production of VEGF, known to modulate smooth muscle (SM) phenotype, this thesis explored the hypothesis that VEGF contributes to hypoxic fetal vascular remodeling through direct effects on SM cells and indirectly through perivascular nerves. Using a chronic hypoxia sheep model, this work demonstrated that: 1) hypoxia potently upregulates VEGF receptor expression but not endogenous VEGF level in fetal ovine carotid arteries; 2) both chronic hypoxia and VEGF exert similar effects on smooth muscle contractile …
Long-Term Hypoxia Regulates Cortisol Biosynthesis In The Ovine Fetal Adrenal Cortex, Vladimir Enrique Vargas
Long-Term Hypoxia Regulates Cortisol Biosynthesis In The Ovine Fetal Adrenal Cortex, Vladimir Enrique Vargas
Loma Linda University Electronic Theses, Dissertations & Projects
Previous studies demonstrated enhanced fetal adrenal cortisol biosynthesis following exposure to long-term hypoxia (LTH). The studies presented here were designed to determine the mechanism(s) regulating this important adaptive endocrine response. Ewes were maintained at high altitude (3,820 m) from approximately day 40 to 138-141 of gestation. Fetal adrenal glands were then collected from LTH and age matched normoxic controls. Dispersed fetal adrenal cortical cells (FACs) were untreated, treated with ACTH, treated in combination with ACTH precursors (POMC and 22-kDa pro-ACTH), or pre-treated with H-89 and or UO126 followed by ACTH treatment. Following ACTH treatment, cortisol biosynthesis increased in both groups …