Human amniotic fluid motogenic activity for fetal alveolar type II cells by way of hepatocyte growth factor.

Abstract:

OBJECTIVE:To find out if hepatocyte growth factor (HGF) in amniotic fluid (HGF-AF) has a direct effect on fetal lung development, we investigated the effects of AF as well as recombinant human HGF (rhHGF) on proliferation, migration, and morphogenesis of fetal alveolar type II cells in vitro. METHODS:Amniotic fluid samples were obtained from 37 women at various gestational ages. Mitogenic, motogenic, and morphogenic activity was investigated by 5-bromo-2'-deoxyuridine incorporation, Boyden chamber assay, and culture in collagen-gels, respectively. RESULTS:The motility of AK-D cells was stimulated by AF from 14 to 31 weeks' gestation in proportion to the concentration of HGF-AF, and this effect was comparable to that observed with rhHGF. Furthermore, this activity was neutralized by anti-human HGF antibody. However, AF samples subsequent to 32 weeks had no motogenic influence despite the continued presence of immunoreactive HGF-AF. Neither increased DNA synthesis nor morphogenesis in response to AF was identified under the conditions used. CONCLUSION:The present study suggests that AF stimulates alveolar type II cell migration by way of HGF-AF in vitro.

journal_name

Obstet Gynecol

authors

Itakura A,Kurauchi O,Morikawa S,Furugori K,Mizutani S,Tomoda Y

doi

10.1016/s0029-7844(97)00083-5

subject

Has Abstract

pub_date

1997-05-01 00:00:00

pages

729-33

issue

5 Pt 1

eissn

0029-7844

issn

1873-233X

journal_volume

89

pub_type

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