Abstract:
:Electrophoretic mobility shift assays revealed minimal levels of NF-kappaB activity in rat distal lung epithelial cells cultured at fetal (23 mmHg) or adult alveolar (100 mmHg) P(O2), but revealed significant activation of this transcription factor in cells exposed to a rise in P(O2) mimicking that experienced at birth. This response was entirely abolished by pretreating cells with 5 mM sulfasalazine (SSA). This shift in P(O2) also evoked a rise in apical Na+ conductance (G(Na+)) that may underlie the O2-evoked stimulation of Na+ transport seen in these cells. Pretreatment with SSA had no effect upon G(Na+) in cells cultured continually at adult or fetal P(O2) but did inhibit the increase in G(Na+) seen in cells that had experienced the rise in P(O2). O2-evoked activation of NF-kappaB may thus mediate the increased Na+ transport that occurs when the distal lung epithelial cells are exposed to a physiologically-relevant increase in P(O2).
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Haddad JJ,Collett A,Land SC,Olver RE,Wilson SMdoi
10.1006/bbrc.2001.4453subject
Has Abstractpub_date
2001-03-09 00:00:00pages
987-92issue
4eissn
0006-291Xissn
1090-2104pii
S0006-291X(01)94453-5journal_volume
281pub_type
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