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Biomarkers of glomerular dysfunction in pre-eclampsia - A systematic review
Robert N Kerley1, Cathal McCarthy1
1Irish Centre for Fetal and Neonatal Translational Research (INFANT), Cork University Maternity Hospital, Cork, Ireland.
Insights
Biomarkers of podocyte injury, such as urinary nephrin, show promise for diagnosing pre-eclampsia. Further large-scale studies are needed to confirm their clinical utility in routine antenatal care.
Area of Science:
- Nephrology
- Obstetrics
- Biomarker Research
Background:
- Early pre-eclampsia detection is crucial in antenatal care but often delayed due to non-specific symptoms.
- Podocyte injury in pre-eclampsia leads to proteinuria, highlighting podocytes as key indicators.
- This review focuses on the diagnostic potential of podocyte injury biomarkers.
Purpose of the Study:
- To systematically review and assess the clinical utility of podocyte injury biomarkers for pre-eclampsia prediction.
- To evaluate the diagnostic accuracy of identified biomarkers.
Main Methods:
- A systematic literature review was conducted using QUADAS criteria.
- The review focused on studies evaluating biomarkers of podocyte injury in pre-eclampsia.
- Diagnostic accuracy data for identified biomarkers were pooled.
Main Results:
- Five renal biomarkers were identified: podocytes, nephrin, synaptopodin, podocin, and podocalyxin.
- The pooled sensitivity and specificity for all biomarkers were 0.78 and 0.82, respectively.
- Urinary nephrin demonstrated the highest diagnostic accuracy with 0.81 sensitivity and 0.84 specificity.
Conclusions:
- Glomerular injury biomarkers show potential as diagnostic aids for pre-eclampsia.
- Urinary nephrin is a promising biomarker for pre-eclampsia diagnosis.
- Large-scale prospective studies are required before routine clinical implementation.
Background:
Early detection of pre-eclampsia remains one of the major focuses of antenatal obstetric care. There is often a delay in the diagnosis, mainly due to the non-specific nature of the condition. Podocytes which play a pivotal role in glomerular function become injured in pre-eclampsia leading to subsequent proteinuria. Our aim was to review available studies to determine the clinical utility of biomarkers of podocyte injury in pre-eclampsia.
Methods:
We used QUADAS (Quality Assessment of Diagnostic Accuracy Studies) criteria to perform a systematic review of the literature to determine the clinical utility of podocyte injury biomarkers in predicting pre-eclampsia.
Results:
This study identified five potential renal biomarkers including podocytes, nephrin, synaptopodin, podocin and podocalyxin. The pooled sensitivity of all biomarkers was 0.78 (95% CI 0.74-0.82) with a specificity of 0.82 (95% CI 0.79-0.85). The area under the Summary of Receiver Operating Characteristics Curve (SROC) was 0.926 (SE 0.30). Urinary nephrin achieved the highest diagnostic values with a sensitivity of 0.81 (95% CI 0.72-0.88) and specificity of 0.84 (95% CI 0.79-0.84).
Conclusion:
Biomarkers of glomerular injury show promise as diagnostic aids in pre-eclampsia. A large-scale prospective cohort study is warranted before these biomarkers can be recommended for routine clinical care.
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