Hypoxia up-regulated angiogenin and down-regulated vascular cell adhesion molecule-1 expression and secretion in human placental trophoblasts

Raja Shekhar Gangaraju, A. Loganath, A. C. Roy, S. S. Chong, Y. C. Wong

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

OBJECTIVE: Many processes that are involved in cellular invasion, including blastocyst implantation, placental development, and rapidly growing tumors, occur in reduced oxygen environments. It has been surmised that oxygen tension could regulate the cytotrophoblast ability to differentiate and, as a consequence, to express proteins that are critical for placentation. The objective of the current investigation was therefore to test the hypothesis that placental tissues and trophoblast cells in culture, under low oxygen tension, release angiogenic factors that could affect vascular behavior and invasive potential, thus providing a link between abnormal placentation and maternal vascular abnormality. METHODS: Functionally active term placental explant culture and trophoblast cultures were used to demonstrate the secretion profiles of angiogenin and vascular cell adhesion molecule-1 (VCAM-1), and the real-time quantitative reverse transcriptase polymerase chain reaction (RT-PCR) technique was employed to demonstrate the mRNA expression under both normoxic and hypoxic conditions. RESULTS: A significant increase in the secretion (P <.01) and mRNA expression (P <.01) of angiogenin and a significant decrease in the secretion (P <.04) and mRNA expression (P <.03) of VCAM-1 from both term placental explants and trophoblast cultures subjected to hypoxia in vitro were observed. CONCLUSION: Because the primary defect in uteroplacental insufficiency is placental maldevelopment probably associated with hypoxia in situ, this study provides molecular evidence to indicate that the differential expression and secretion of angiogenic factors may play an important role in these pathologic conditions.

Original languageEnglish (US)
Pages (from-to)310-319
Number of pages10
JournalJournal of the Society for Gynecologic Investigation
Volume12
Issue number5
DOIs
StatePublished - Jul 1 2005
Externally publishedYes

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Vascular Cell Adhesion Molecule-1
Trophoblasts
Placentation
Angiogenesis Inducing Agents
Oxygen
Messenger RNA
Blood Vessels
Placental Insufficiency
Aptitude
Reverse Transcriptase Polymerase Chain Reaction
Cell Culture Techniques
Mothers
Hypoxia
angiogenin
Neoplasms
Proteins

All Science Journal Classification (ASJC) codes

  • Obstetrics and Gynecology

Cite this

Hypoxia up-regulated angiogenin and down-regulated vascular cell adhesion molecule-1 expression and secretion in human placental trophoblasts. / Gangaraju, Raja Shekhar; Loganath, A.; Roy, A. C.; Chong, S. S.; Wong, Y. C.

In: Journal of the Society for Gynecologic Investigation, Vol. 12, No. 5, 01.07.2005, p. 310-319.

Research output: Contribution to journalArticle

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