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Master's Dissertation
DOI
10.11606/D.42.2016.tde-11082016-145839
Document
Author
Full name
Cainã Max Couto da Silva
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2016
Supervisor
Committee
Lopes, Marilene Hohmuth (President)
Debbio, Carolina Beltrame Del
Lee, Kil Sun
Title in Portuguese
Papel da proteína prion celular e seu ligante, stip1, na neurogênese adulta.
Keywords in Portuguese
Chaperona
NSPCs
Precursores neurais
Proteína prion
PrPC
STIP1
Abstract in Portuguese
A proteína prion celular (PrPC) consiste em uma glicoproteína de membrana que atua como receptora para diversas moléculas, desencadeando sinais intracelulares. Ao interagir com a co-chaperona STIP1, PrPC promove a autorrenovação e proliferação de células-tronco/progenitoras neurais (NSPCs) durante a fase embrionária. De fato, PrPC tem se destacado por sua participação na neurogênese embrionária e adulta, porém o papel de sua interação com a proteína STIP1 na neurogênese adulta permanece obscuro. Deste modo, o presente trabalho adotou abordagens in vitro para avaliação do complexo PrPC-STIP1 em processos celulares que culminam na neurogênese adulta. Para isso, culturas primárias de NSPCs de camundongos deficientes (Prnp-/-) e tipo-selvagens (Prnp+/+) para PrPC foram realizadas, e a cultura foi devidamente padronizada e caracterizada. Através de ensaios de autorrenovação, proliferação e migração celular sugere-se que PrPC promove estes eventos celulares independentemente de STIP1, e que possivelmente a proteína laminina seja um alvo crítico para migração via PrPC.
Title in English
Role of cellular prion protein and its ligand, stip1, in the adult neurogenesis.
Keywords in English
Chaperone
Neural precursors
NSPCs
Prion protein
PrPC
STIP1
Abstract in English
Cellular prion protein (PrPC) consists in a membrane glycoprotein that acts as a receptor to several molecules, triggering intracellular signals. By interacting with co-chaperone STIP1, PrPC promotes self-renewal and proliferation of neural stem/progenitor cells (NSPCs) during embryonic stage. Indeed, PrPC has excelled for its participation in embryonic and adult neurogenesis, but the role of its interaction with STIP1 protein in adult neurogenesis remains unclear. Thus, herein it was adopted in vitro approaches in order to evaluate the PrPC-STIP1 complex on cellular processes that culminate in adult neurogenesis. In order to assess that, NSPC primary cultures of PrPC deficient (Prnp-/-) and wild-type (Prnp+/+) mice were performed, and the culture was properly standardized and characterized. Through self-renewal, proliferation and cell migration assays, it was suggested that PrPC promotes these cellular events regardless of STIP1, and possibly the laminin protein is a critical target for migration via PrPC.
 
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Publishing Date
2016-08-11
 
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