Identification of Novel Biomarkers Using Serum and Urinary Proteomics for Early Detection of Hypoxic Ischemic...

Hypoxic-ischemic encephalopathy (HIE) is a severe birth complication affecting neonates. Around 40-60% of affected neonates die by two years of age or have severe disabilities and neurodevelopmental delays. The early assessments of brain injury using traditional clinical and biochemical indicators do not always align with its severity and recovery. This delays identifying neonates who may benefit from adjuvant therapeutic strategies and monitoring therapy response. Our aim was to identify specific proteins using proteomic approach to predict the severity of neonatal asphyxia so that its outcome can also be prevented. To achieve this goal a case-control study was conducted on 38 neonates, and serum and urine samples were collected within 24 h of life. Clinical findings, biochemical parameters, and outcomes of the neonates were recorded. A tandem mass spectrometry-based quantitative proteomics approach was used to identify proteins in the serum and urine of HIE neonates. Bioinformatics analyses were performed to assess the potential features and competence of the identified differentially expressed proteins. This resulted in identification of 51 differentially expressed proteins which were found common to both serum and urine proteomic data. Some of the promising biomarkers found were APOD, ORM1, SOD1, and FABP1. These proteins were associated with the pathways like Amyloid fiber formation, diseases of programmed cell death, detoxification of reactive oxygen species, and neurodegenerative diseases. This study will pave the way for identifying the biomarkers (proteins) that can screen neonates for brain injury and monitor the disease progression, which may reduce mortality and neurodevelopmental impairment.

The online version contains supplementary material available at 10.1007/s12291-023-01143-2.