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Full-Text Articles in Medicine and Health Sciences
Patterns Of Fecal Progestagens, Estrogens, And Androgens Associated With Reproduction In Blue-Throated Piping Guans (Pipile Cumanensis), Leslie Ann Sterling, Helen Clawitter, Corinne P. Kozlowski, Michael Macek, Anne Tieber
Patterns Of Fecal Progestagens, Estrogens, And Androgens Associated With Reproduction In Blue-Throated Piping Guans (Pipile Cumanensis), Leslie Ann Sterling, Helen Clawitter, Corinne P. Kozlowski, Michael Macek, Anne Tieber
Undergraduate Research Symposium Posters
While fecal hormone analyses are routinely employed to monitor reproduction in mammals, few studies have used these techniques for monitoring reproductive events in birds. This study describes the endocrine patterns associated with reproduction in the blue-throated piping guan (Pipile cumanensis), a less threatened relative of the critically endangered Trinidad piping guan (P. pipile). Fecal samples were collected approximately once a week for 3 years from seven female guans and six male guans at the Saint Louis Zoo. Concentrations of fecal progestagens, estrogens, and androgens were quantified using commercially available enzyme immunoassays. Baseline progestagen concentrations for females …
The Role Of Notch Signaling On Heart Rate And Atrial Conduction, Somya Bhatnagar
The Role Of Notch Signaling On Heart Rate And Atrial Conduction, Somya Bhatnagar
Undergraduate Research Symposium Posters
Heart disease is the leading cause of death worldwide and can result in arrhythmias, or dysregulation in the electrical activation of the heart. Sick Sinus Syndrome (SSS) is characterized by sinus bradycardia (slowed heart rate, HR), slowed conduction through atrial myocardium, and can predispose to the development of atrial fibrillation. A developmental signaling pathway, Notch, regulates cellular identity through differentiation of cardiomyocytes (CMs) into cardiac conduction system-like cells. Previous data show that Notch electrically remodels the right atrium, causing slowed conduction velocity (CV) and hallmarks of SSS including sinus pauses, sinus bradycardia and a predisposition to atrial fibrillation. However, the …