test Browse by Author Names Browse by Titles of Works Browse by Subjects of Works Browse by Issue Dates of Works
       

Advanced Search
Home   
 
Browse   
Communities
& Collections
  
Issue Date   
Author   
Title   
Subject   
 
Sign on to:   
Receive email
updates
  
My Account
authorized users
  
Edit Profile   
 
Help   
About T-Space   

T-Space at The University of Toronto Libraries >
School of Graduate Studies - Theses >
Doctoral >

Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/32690

Title: Regulation of B Lymphopoiesis: The Role of IL-7, SOCS-1, Heparan Sulfate and CD19 in Mediating B Cell Development
Authors: Corfe, Steven A.
Advisor: Paige, Christopher J.
Department: Immunology
Keywords: B Cell Development
Issue Date: 21-Aug-2012
Abstract: B lymphopoiesis is regulated by cytokines, chemokines and cell surface proteins that initiate signal transduction pathways necessary for maturation to proceed. Many of these factors are expressed by cells in the surrounding bone marrow (BM) microenvironment, which also form the niches that support development. Interleukin-7 (IL-7) is an essential cytokine for progenitor B cells and is important in providing survival, proliferation and maturation signals. By growing BM B cells for extended periods of time in vitro with IL-7 it is possible to select for cells that possess the ability to grow indefinitely, and these cultures can be used to generate cell lines. Data presented herein describe the generation and characterization of IL-7-dependent B cell lines as well as their utility in investigating aspects of B cell development. As B cells mature they lose responsiveness to IL-7, yet retain IL-7 receptor expression. I demonstrate that a B cell’s ability to respond to IL-7 is controlled by the expression of suppressor of cytokine signaling (SOCS) proteins, which are regulated by a variety of signaling pathways including those initiated by IL-7. Development of progenitor B cells to mature immunoglobulin secreting B cells is mediated in part by surface proteins present on stromal cells as well as on B cells themselves. Heparan sulfate and CD19 play important roles in regulating this transition and I provide data that demonstrates how their ability to regulate Erk activation downstream of the pre-B cell receptor (pre-BCR) alters the proliferation and maturation of developing B cells.
URI: http://hdl.handle.net/1807/32690
Appears in Collections:Doctoral

Files in This Item:

File Description SizeFormat
Corfe_Steven_A_201206_phD_thesis.pdf8.59 MBAdobe PDF
View/Open

Items in T-Space are protected by copyright, with all rights reserved, unless otherwise indicated.

uoft