Table 1 Degree of positivity for inducible heme oxygenase (HO-1) and constitutive heme oxygenase (HO-2) immunostaining
HO-1 | HO-2 | |||||
|---|---|---|---|---|---|---|
Weeks of Gestation | Weeks of Gestation | |||||
7 | 10 | 39 | 7 | 10 | 39 | |
Trophoblastic brush border | + | − | − | + | + | + |
Syncytial trophoblast | +/− | − | − | − | − | − |
Cytototrophoblast | − | − | − | ++ | + | − |
Villous stromal cells | + | + | + | + | +/− | − |
Perivascular stromal cells | ++ | +++ | ++++ | + | ++ | + |
Stem vessel media | − | − | − | − | − | − |
Endothelium/intima | − | − | +/− | +/− | +/− | +++ |
Decidua | +++ | +++ | ++ | ++ | ++ | ++ |
Chorion | ++ | +++ | +++ | + | + | + |
Amnion | +/− | − | + | + | +/− | + |