TY - JOUR
T1 - Nrf-2 regulation of prion protein expression is independent of oxidative stress
AU - Cichon, Ann-Christin
AU - Brown, David R.
PY - 2014/11
Y1 - 2014/11
N2 - Cellular expression of host prion protein (PrP) is essential to infection with prion disease. Understanding the mechanisms that regulate prion protein expression at both the transcriptional and translational levels is therefore an important goal. The cellular prion protein has been associated with resistance to oxidative, and its expression is also increased by oxidative stress. The transcription factor Nrf-2 is associated with cellular responses to oxidative stress and is known to induce upregulation of antioxidant defense mechanisms. We have identified an Nrf-2 binding site in the prion protein promoter (. Prnp) and shown that Nrf-2 downregulated PrP expression. However, this effect is independent of oxidative stress as oxidative stress can up-regulate PrP expression regardless of the level of Nrf-2 expression. Furthermore, Nrf-2 has no impact on PrP expression when cells are infected with scrapie. These findings highlight that Nrf-2 can regulate PrP expression, but that this regulation becomes uncoupled during cellular stress.
AB - Cellular expression of host prion protein (PrP) is essential to infection with prion disease. Understanding the mechanisms that regulate prion protein expression at both the transcriptional and translational levels is therefore an important goal. The cellular prion protein has been associated with resistance to oxidative, and its expression is also increased by oxidative stress. The transcription factor Nrf-2 is associated with cellular responses to oxidative stress and is known to induce upregulation of antioxidant defense mechanisms. We have identified an Nrf-2 binding site in the prion protein promoter (. Prnp) and shown that Nrf-2 downregulated PrP expression. However, this effect is independent of oxidative stress as oxidative stress can up-regulate PrP expression regardless of the level of Nrf-2 expression. Furthermore, Nrf-2 has no impact on PrP expression when cells are infected with scrapie. These findings highlight that Nrf-2 can regulate PrP expression, but that this regulation becomes uncoupled during cellular stress.
KW - Nrf-2
KW - Oxidative stress
KW - Prion disease
KW - Promoter
KW - Transcription factor
UR - http://www.scopus.com/inward/record.url?scp=84908348144&partnerID=8YFLogxK
UR - http://dx.doi.org/10.1016/j.mcn.2014.09.001
U2 - 10.1016/j.mcn.2014.09.001
DO - 10.1016/j.mcn.2014.09.001
M3 - Article
AN - SCOPUS:84908348144
SN - 1044-7431
VL - 63
SP - 31
EP - 37
JO - Molecular and Cellular Neuroscience
JF - Molecular and Cellular Neuroscience
ER -