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Updated: Jun 19, 2026

Monitoring Dynamic Growth of Retinal Vessels in Oxygen-Induced Retinopathy Mouse Model
Published on: April 2, 2021
Risk factors and growth factors in ROP
1Division of Neonatology, Catholic University of Rome, Largo A. Gemelli, 8 00168, Rome, Italy. j.rampazzi@emec-roma.com
Insights
Retinopathy of prematurity (ROP) is a growing concern in very preterm infants. Early intervention is crucial, as risk factors significantly impact retinal vascular development from the first weeks of life.
Area of Science:
- Ophthalmology
- Neonatology
- Developmental Biology
Background:
- Retinopathy of prematurity (ROP) incidence is rising due to increased survival rates of very preterm infants.
- ROP involves abnormal retinal vascular development influenced by vascular growth factors like IGF-1 and VEGF.
- Numerous factors, including gestational age, birth weight, oxygen, infections, and transfusions, affect retinal vascularization.
Purpose of the Study:
- To analyze the time-dependent role of postnatal risk factors in the pathogenesis of Retinopathy of Prematurity.
- To determine the critical window for intervention in very preterm infants at risk for ROP.
Main Methods:
- Review of existing literature on Retinopathy of Prematurity pathogenesis and risk factors.
- Analysis of the temporal influence of various risk factors on retinal vascular development.
- Correlation of early-life risk factors with the onset and severity of ROP.
Main Results:
- Postnatal risk factors significantly influence retinal vascular development in a time-dependent manner.
- The critical period for ROP pathogenesis is within the first two to four weeks of life.
- ROP development begins before clinical features are apparent, highlighting the importance of early risk factor management.
Conclusions:
- Preventive strategies for Retinopathy of Prematurity in very preterm infants must be implemented from birth.
- Understanding the temporal dynamics of risk factors is essential for effective ROP prevention.
- Early and continuous monitoring and management of risk factors are vital for improving outcomes in preterm infants.
Abstract:
Retinopathy of prematurity (ROP) is a multifactorial disease which incidence is increasing with increasing survival of very preterm infants. Pathogenic pathway is characterised by abnormal retinal vascular development modulated by vascular growth factors: low IGF-1 in the first phase and high VEGF in the second phase. Many causal factors are able to influence retinal vascularization: gestational age, birth weight, oxygen administration, perinatal bacterial or fungal infections, and blood transfusions. All risk factors, both oxygen and not-oxygen-regulated, have been studied considering the whole period from hospital birth to the hospital discharge, but it is possible that postnatal risk factors may be determinant in a time-dependent way. Analysis of factors involved in the pathogenesis of ROP suggests that their action begins long before anatomical clinical features become appreciable and this is strengthened by the essential role of risk factors from the first two to four weeks of life, thus preventive strategies in very preterm infants should be carried out since birth.
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