Date of Award
1-1-2017
Document Type
Masters Thesis
Degree Name
M.S.
Organizational Unit
Biological Sciences
First Advisor
Joseph K. Angleson, Ph.D.
Second Advisor
Cedric Asensio
Third Advisor
Schuyler van Engelenburg
Fourth Advisor
Eric Boschmann
Keywords
Anterior pituitary, Exocytosis, IA2, Islet antibody 2, Lactotrophs, Phogrin, Synaptotagmin
Abstract
Peptides, which are packaged in dense core vesicles, are an integral part of the function of the endocrine and neurological systems. The dense core vesicles function as an efficient form of peptide storage prior to regulated exocytosis. Two different dense core specific transmembrane proteins traffic different when comparted to retained prolactin cores, offering evidence of heterogeneity of vesicles within a single cell. By comparing synaptotagmin 1 and 7 distribution in male rat and lactating female lactotrophs, a distinct pattern emerges. Cells that retain prolactin cores after exocytosis correspond with those that contain synaptotagmin 1. This finding is a reversal for previous studies in chromaffin cells supporting the theory that not all dense core vesicles are the same across cell types. These experiments offer evidence of two different levels of heterogeneity in dense core vesicles across cell types and within a single cell. This variation allows cells to have robust regulation over secretion, an necessity in these vital systems.
Publication Statement
Copyright is held by the author. User is responsible for all copyright compliance.
Rights Holder
Kelly Sinak
Provenance
Received from ProQuest
File Format
application/pdf
Language
en
File Size
45 p.
Recommended Citation
Sinak, Kelly, "Dense Core Vesicle Heterogeneity in Anterior Pituitary Cells" (2017). Electronic Theses and Dissertations. 1364.
https://digitalcommons.du.edu/etd/1364
Copyright date
2017
Discipline
Cellular biology, Molecular biology, Biology