Decreases in adrenomedullin expression and ciliary beat frequency in the nasal epithelium in tubal pregnancy

Nasal epithelial adrenomedullin expression is decreased in tubal ectopic pregnancy, which is associated with reduced ciliary beat frequency, and this may help predict the risk of tubal ectopic pregnancy.


Wai Sum O, Ph.D., Hang Wun Raymond Li M.Med.Sc., M.R.C.O.G., Su-Bin Liao, M.D., Ph.D., Annie Nga Yin Cheung, M.D., F.R.C.P., Ernest Hung Yu Ng, M.D., F.R.C.O.G., William Shu Biu Yeung, Ph.D., James Chung-Man Ho, M.D., F.R.C.P., Fai Tang, Ph.D.

Volume 100, Issue 2, Pages 459-463.e1, August 2013



To study adrenomedullin (ADM) expression and its relation to ciliary beat frequency (CBF) in the nasal mucociliated epithelium in tubal ectopic pregnancy (tEP).


Experimental study.


University teaching hospital.


Women with tEP and normal intrauterine pregnancy matched for age and gestational age were recruited. Healthy nonpregnant women were also recruited as nonpregnant controls.


Nasal epithelial brushing.

Main Outcome Measure(s):

Adrenomedullin expression in nasal epithelium (measured by real-time reverse transcription–polymerase chain reaction, plasma ADM concentration (measured by ELISA), and CBF (measured by photometric method).


We have demonstrated a similar decrease in ADM expression and CBF in the nasal mucociliated epithelium, as well as in plasma ADM concentration, in women with tEP compared with normal pregnant women. Adrenomedullin up-regulates nasal CBF via the ADM receptor, as in the oviduct. There is significant correlation between nasal and oviductal CBF.


Nasal epithelium ADM and CBF, as well as plasma ADM, are possible predictors of women at risk of tEP.

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