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Low birth weight in HEU infants remains a significant clinical concern for healthcare providers in India. While vertical transmission of HIV has decreased dramatically, these children still face unique health risks. Specifically, intrauterine exposure to HIV and antiretroviral drugs may disrupt normal fetal development. Consequently, identifying the biological pathways responsible for growth restriction is essential for improving neonatal outcomes.
Recent research focused on endothelial markers to explain these growth disparities. Scientists evaluated two key proteins, angiopoietin-1 (Ang-1) and angiopoietin-2 (Ang-2), in a cohort of 294 Ugandan infants. These proteins play vital roles in maintaining vascular stability. However, an imbalance can lead to endothelial dysfunction. The study found that infants with low birth weight had a median Ang-2/Ang-1 ratio of 0.051. In contrast, infants with normal birth weight had a much lower ratio of 0.018. This statistically significant difference suggests that vascular health is a major factor in fetal growth.
Furthermore, the data indicates that endothelial dysregulation may be a primary driver of adverse pregnancy outcomes. When the Ang-2/Ang-1 ratio increases, it often signals vascular leakage and inflammation. This environment is detrimental to a developing fetus. Therefore, monitoring these biomarkers could help clinicians identify high-risk pregnancies earlier. Additionally, focusing on maternal endothelial health might provide new avenues for intervention. Addressing these vascular changes could eventually reduce the prevalence of low birth weight in HEU infants across high-burden regions.
Angiopoietins are growth factors that regulate the formation and maintenance of blood vessels. Ang-1 promotes vessel stability, while Ang-2 is often associated with vascular inflammation and instability when levels are excessively high.
Even without direct infection, maternal HIV exposure can cause chronic immune activation and placental vascular issues. These factors limit the supply of nutrients and oxygen to the fetus, leading to lower birth weights.
Disclaimer: This content is for informational and educational purposes only. It does not constitute professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified healthcare provider with any questions you may have regarding a medical condition. Refer to the latest local and national guidelines for clinical practice.
References
Sawatzky J et al. Dysregulation of circulating angiopoietins is associated with low birth weight in children who are HIV-exposed and uninfected. AIDS. 2026 May 01. doi: 10.1097/QAD.0000000000004424. PMID: 41891219.
Silver KL et al. Dysregulation of Angiopoietins Is Associated with Placental Malaria and Low Birth Weight. PLoS ONE. 2010;5(3):e9481. doi: 10.1371/journal.pone.0009481.
Kumar A et al. Pregnancy Outcomes in HIV-Infected Women: Experience from a Tertiary Care Center in India. Matern Child Health J. 2016;20(9):1881-1888. doi: 10.1007/s10995-016-2002-3.
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