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Articles 1 - 7 of 7
Full-Text Articles in Comparative and Evolutionary Physiology
Ammonia Regulation In Aedes Taeniorhynchus, A Salt-Water Mosquito, Joseph Edmonds
Ammonia Regulation In Aedes Taeniorhynchus, A Salt-Water Mosquito, Joseph Edmonds
Undergraduate Honors Theses
The salt tolerant mosquito species Aedes taeniorhynchus has been observed in high salinity and ammonia conditions. Previous studies indicate Na+/K+ ATPase (NKA), the proton pump vacuolar-type H+ ATPase (VHA) and sodium-dependent cation-chloride cotransporters (NKCC’s) in sodium secretion in larval Aedes taeniorhynchus. However ammonia transporter such as Rh-protein, Amt1, and Amt2 have only been characterized in Aedes taeniorhynchus’s fresh water relative Aedes aegypti. Our research exhibits the expression of these transporters in A.taeniorhynchus using immunohistochemistry techniques. Evidence of VHA and NKA function in ammonia transport was characterized in vivo using drug antagonists in varying saline and ammonia concentrations. Ammonia flux rates …
Impacts Of Temperature Acclimation On Swimming Performance And Metabolic Dynamics Of The Amargosa River Pupfish, Cyprinodon Nevadensis Amargosae, Teresa E. Guerre
Impacts Of Temperature Acclimation On Swimming Performance And Metabolic Dynamics Of The Amargosa River Pupfish, Cyprinodon Nevadensis Amargosae, Teresa E. Guerre
Master's Theses
Climate change is leading to warmer atmospheric temperatures in many regions of the world, which in turn is raising the temperatures of aquatic habitats and simultaneously shifting the frequency and severity of extreme precipitation events. In fishes, metabolic demands are higher under warmer conditions, while dissolved oxygen levels typically decline in warmer water. This mismatch may limit the ability of fishes to cope with high water flow events like floods that can occur following extreme rainfall. A few species of pupfishes (genus Cyprinodon) in the Death Valley region of California and Nevada, USA, occupy stream or river habitats with …
Assessing The Osmoregulatory Capabilities Of American Alligator Lingual Glands, Benjamin Angalet, Nicholas S. Green
Assessing The Osmoregulatory Capabilities Of American Alligator Lingual Glands, Benjamin Angalet, Nicholas S. Green
Symposium of Student Scholars
Crocodilians inhabit a wide variety of aquatic, marine, and estuarine habitats on 4 continents. Saltwater-adapted species and populations face considerable osmoregulatory challenges in maintaining homeostasis with respect to plasma salt [NaCl] concentration. In addition to the kidneys and cloaca found in all crocodilians, crocodiles possess a salt-secreting lingual gland whose presence and function is less understood in other crocodilians. This study investigates the lingual gland anatomy, physiology, and potential function of American alligator (Alligator mississippiensis) populations exposed to varying salinity levels. At each of four sites (Jekyll Island, Sapelo Island, Okefenokee NWR, and Banks Lake NWR), we will capture 12 …
Metabolic And Microbial Crossroads: Sodium-Glucose Cotransporter-2 Inhibitors And Urinary Tract Infections In (Asian) Diabetes Care, Rob E. Carpenter
Metabolic And Microbial Crossroads: Sodium-Glucose Cotransporter-2 Inhibitors And Urinary Tract Infections In (Asian) Diabetes Care, Rob E. Carpenter
Human Resource Development Faculty Publications and Presentations
The global rise of type 2 diabetes, particularly in Asian populations, has led to widespread adoption of sodium-glucose cotransporter-2 (SGLT2) inhibitors for glycemic control. While effective, these agents elevate the risk of urinary tract infections (UTIs) by inducing glycosuria, which creates a nutrient-rich environment that favors uropathogen growth. Asian individuals may be disproportionately vulnerable to SGLT2 inhibitor–associated UTIs due to a confluence of factors, including lower body mass index, increased visceral adiposity, congenital urinary tract anomalies, and genetic polymorphisms that impair uroepithelial integrity and immunity. This review integrates emerging evidence on the molecular, anatomical, and immunometabolic mechanisms that underlie infection …
Metabolic Transitions In Embryos Of Artemia Franciscana: Regulation And Consequences For Oxidative Stress, Daniel Anthony Arabie
Metabolic Transitions In Embryos Of Artemia Franciscana: Regulation And Consequences For Oxidative Stress, Daniel Anthony Arabie
LSU Doctoral Dissertations
Embryos of Artemia franciscana survive harsh conditions in diapause and anoxia-induced quiescence for years by undergoing deep metabolic transitions. I investigated the relationship between phosphorylation of pyruvate dehydrogenase (PDH) and carbon flux to the tricarboxylic acid (TCA) cycle during metabolic depression. The difference in catalytic activity of the PDH complex (PDC) in maximally phosphorylated and dephosphorylated samples was 16.5-fold. Western blot analysis confirmed the changes in phosphorylation of PDH. Analysis of PDH expression in diapause and post-diapause embryos via phospho-PDH showed no significant differences. Investigation of post-diapause embryos under anoxia showed that phosphorylation of PDH decreased and activated the enzyme. …
Mitochondrial Mrna And The Small Subunit Rrna In Budding Yeasts Undergo 3'-End Processing At Conserved Species-Specific Elements, Michael Anikin, Michael F Henry, Viktoria Hodorova, Hristo B Houbaviy, Jozef Nosek, Dimitri G Pestov, Dmitriy A Markov
Mitochondrial Mrna And The Small Subunit Rrna In Budding Yeasts Undergo 3'-End Processing At Conserved Species-Specific Elements, Michael Anikin, Michael F Henry, Viktoria Hodorova, Hristo B Houbaviy, Jozef Nosek, Dimitri G Pestov, Dmitriy A Markov
Rowan-Virtua School of Osteopathic Medicine Departmental Research
Respiration in eukaryotes depends on mitochondrial protein synthesis, which is performed by organelle-specific ribosomes translating organelle-encoded mRNAs. Although RNA maturation and stability are central events controlling mitochondrial gene expression, many of the molecular details in this pathway remain elusive. These include
The Evolution Of The Stress Response In The Trinidadian Killifish: Ecological Drivers And Maternal Mediation, Mikaela E. Feder
The Evolution Of The Stress Response In The Trinidadian Killifish: Ecological Drivers And Maternal Mediation, Mikaela E. Feder
Biology Dissertations - Archive
Ecological variables can induce the stress response in organisms. Yet, few studies have tested for evolutionary shifts in stress responses across ecological gradients. In these studies, we used Trinidadian killifish found in sites with predators (high predation, HP) and sites where they are the only fish present (killifish only, KO). HP and KO populations differ in a suite of behavioral and life-history traits, making the Trinidadian killifish an excellent model to examine evolutionary physiology. My dissertation addresses the knowledge gap by examining: (1) how baseline cortisol differs in wild-caught Trinidadian killifish found in HP and KO sites, (2) the influence …