HTR1B and pulmonary arterial hypertension: The expression of receptors associated with pulmonary hypertension and RV remodeling such as receptor (HTR1B), BMPR2 and endoglin (Gore et al., 2014; Hautefort et al., 2019; Hood et al., 2017; Keegan et al., 2001; Wallace et al., 2015) were not affected by MA.