Circulating ET like immunoreactive peptides were similar in D 2-/- and D 2+/+ mice but ETB receptor expression was greater in D 2-/- than in D 2+/+ mice.

• D2- / -鼠血浆ET水平与D2 +/ +相似 ,但D2 - / -鼠中ETB受体的表达强于D2 +/ +鼠。