Increased circulating miR-155 identifies a subtype of preeclamptic patients

Area of Science:

• Biomarkers in Obstetrics
• Pregnancy Complications Research
• Molecular Diagnostics in Gynecology

Background:

• Preeclampsia is a heterogeneous pregnancy complication, hindering prediction and prevention efforts.
• Previous research identified high placental miR-155 as a distinct preeclampsia subtype.
• The current study investigates maternal serum miR-155 as a potential marker for this subtype.

Purpose of the Study:

• To determine if elevated maternal serum miR-155 levels can identify a specific preeclampsia subtype.
• To analyze the clinical manifestations associated with high serum miR-155 in preeclampsia patients.
• To evaluate the predictive value of serum miR-155 for this preeclampsia subtype.

Main Methods:

• Conducted case-control and longitudinal cohort studies measuring serum miR-155 across trimesters.
• Defined high serum miR-155 using the 95th percentile of control group levels.
• Compared clinical features between high and normal serum miR-155 preeclampsia groups; utilized t-SNE for subtype clustering.

Main Results:

• Serum miR-155 was significantly elevated in preeclampsia cases compared to controls.
• High serum miR-155 preeclampsia patients exhibited more severe symptoms, including higher blood pressure.
• Increased incidences of HELLP syndrome, visual disturbance, hypertensive retinopathy, and placental abruption were observed in the high miR-155 group.

Conclusions:

• Elevated maternal serum miR-155 is linked to more severe clinical manifestations in preeclampsia.
• Serum miR-155 serves as a potential biomarker for identifying a distinct subtype of preeclampsia.
• This finding aids in classifying preeclampsia subtypes for improved diagnostic and therapeutic strategies.