Factors influencing RNA yield from placenta tissue

Area of Science:

• Reproductive biology
• Molecular biology
• Genomics

Background:

• High yield and integrity of placental RNA are essential for accurate placental transcriptomics.
• Previous studies have not comprehensively evaluated factors affecting placental RNA yield.

Purpose of the Study:

• To determine the optimal protocol for maximizing placental RNA yield and integrity.
• To investigate the impact of various pre-analytical and analytical factors on RNA extraction.

Main Methods:

• Samples were collected and processed under different conditions (time to collection, storage).
• RNA extraction was performed using TRIzol reagent with varying tissue amounts and methods.
• RNA yield was quantified and compared across different placental tissue types (decidua, villi, chorion) and non-placental tissues (murine kidney, HEK293T).

Main Results:

• Immediate cryofreezing of placental samples post-collection is optimal.
• Extraction from 50 mg of tissue using TRIzol reagent provides high RNA yield.
• Decidua yielded the highest RNA quantity per milligram of tissue, followed by villous tissue and chorion.
• Placental RNA yield is generally lower than from murine kidney or HEK293T tissues.

Conclusions:

• An optimal protocol for placental RNA extraction involves immediate cryofreezing and using TRIzol reagent on 50 mg of decidual tissue.
• Understanding tissue-specific variations and optimizing extraction methods are crucial for successful placental transcriptomics.