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In missed abortion the decrease of IGF-1 down-regulates PI3K/AKT signaling pathway reducing the secretion of
Weitao Liang1, Tianyuan Zhu2, Na Tan3
1Institute of Maternal, Child and Adolescent Health, School of Public Health, Lanzhou University, Lanzhou 730000, China.
Reduced Insulin-like Growth Factor-1 (IGF-1) in missed abortion down-regulates the PI3K/AKT pathway, increasing trophoblast cell apoptosis and lowering key hormone levels.
Area of Science:
- Reproductive Biology
- Endocrinology
- Cellular Biology
Background:
- Missed abortion is a pregnancy complication.
- The role of Insulin-like Growth Factor-1 (IGF-1) in missed abortion is not fully understood.
- Investigating IGF-1's impact on trophoblast cells and hormone secretion is crucial.
Purpose of the Study:
- To determine if reduced IGF-1 in missed abortion down-regulates the PI3K/AKT signaling pathway.
- To explore the effect of this pathway on trophoblast cell apoptosis.
- To examine the impact on beta-human chorionic gonadotropin (β-hCG) and progesterone secretion.
Main Methods:
- Compared serum and villous tissue from missed abortion patients (n=12) with normal early pregnancy controls (n=12).
- Utilized Wes Simple Western system and qRT-PCR for gene and protein expression analysis (IGF-1, IGF-1R, PI3K/AKT pathway, apoptosis factors).
- Measured serum β-hCG, progesterone, and IGF-1 using Radioimmunoassay and ELISA.
Main Results:
- Serum levels of β-hCG, progesterone, and IGF-1 were significantly lower in the missed abortion group.
- Genes and proteins related to IGF-1, the PI3K/AKT pathway, and anti-apoptosis factors were decreased in missed abortion villous tissues.
- Trophoblast cell apoptosis was increased in missed abortion cases.
Conclusions:
- Reduced IGF-1 in missed abortion down-regulates the PI3K/AKT signaling pathway.
- This leads to increased trophoblast cell apoptosis and decreased β-hCG and progesterone secretion.
- This mechanism is implicated as a significant factor in missed abortion.
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