.webp&w=384&q=75){kind=logo}
Loading, please wait...
Loading, please wait...
Retinopathy of prematurity (ROP) remains a significant cause of childhood blindness worldwide. Current treatments primarily rely on anti-VEGF agents, which occasionally produce off-target effects. Consequently, researchers are exploring alternative biological pathways to target retinal pathological neovascularization. A recent study suggests that the dopaminergic system plays a critical role in regulating abnormal vessel growth in the eye.
Specifically, the study utilized an oxygen-induced retinopathy (OIR) mouse model to understand the role of dopamine. Researchers found that OIR leads to a distinct dopaminergic deficiency. This deficiency impairs the activity of dopamine D2 receptors (Drd2) located on Müller cells. Moreover, integrated single-cell RNA sequencing revealed that Drd2-mediated signaling governs the biosynthesis of hypoxia-inducible factor alpha. Therefore, impaired Drd2 activity directly contributes to the progression of ROP by allowing growth factors to proliferate unchecked.
The investigation examined various dopamine receptor agonists and antagonists to determine their therapeutic potential. Specifically, apomorphine, a non-selective agonist, effectively inhibited vessel proliferation. Furthermore, Müller cell-specific Drd2 knockout mice exhibited worsened outcomes, confirming the protective role of these receptors. Additionally, the study showed that restoring Drd2 signaling reduces vascular endothelial growth factor A (VEGF-A) levels. This finding suggests that dopaminergic agents might complement current anti-VEGF therapies in the future.
In addition to therapeutic potential, this research highlights the importance of Müller cells in retinal health. These cells act as mediators between neuronal activity and vascular stability. Consequently, understanding their interaction with dopamine provides a foundation for future clinical trials. Scientists hope that these insights will lead to more consistent outcomes for premature infants at risk of blindness.
Dopamine acts as a neuromodulator that helps regulate retinal vascular development. A deficiency in dopamine or its receptors can trigger the uncontrolled growth of blood vessels, which leads to vision loss in conditions like ROP.
While effective, anti-VEGF agents can have variable efficacy and may cause off-target effects in the developing eye and systemic circulation. Researchers are looking for more specific targets, such as Drd2 receptors, to improve treatment safety.
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 health provider with any questions you may have regarding a medical condition. Refer to the latest local and national guidelines for clinical practice.
References
Read summarized clinical updates, watch expert medical content, and earn CME certifications right from your smartphone.
Open your smartphone camera to scan and install.
New research identifies that dopamine deficiency and impaired Drd2 signaling in Müller cells drive pathological angiogenesis in retinopathy of prematurity....
last month
Andhra Pradesh reported 10 new Covid-19 cases, taking the state tally to 49 while deaths remain at four. With 24 patients hospitalized and 16 under home isolation, the Health Department has intensified monitoring. Medical professionals should review regional distribution, diagnostic protocols, and management plans.
Today
An 11-year Swedish registry study of 618 uterine sarcoma patients found that minimally invasive surgery yielded survival comparable to open surgery in early stages. However, adjuvant chemotherapy conferred no survival benefit in localized or advanced disease, highlighting stage and histology as key outcomes.
3 days back
A cross-sectional study evaluates post-intensive care syndrome in cardiac patients 2-4 weeks post-ICU discharge, highlighting cognitive, psychological, and functional impairments and the need for structured multidisciplinary rehabilitation.
3 days back
Anterior cruciate ligament reconstruction failure lacks uniform definition. A narrative review proposes an integrative framework incorporating objective and subjective instability, persistent pain, restricted motion, graft rupture, and secondary meniscal injury to standardize clinical reporting.
3 days back
With World Obesity Atlas data warning that over 41 million Indian children are overweight or obese, ICMR and NIN have unveiled a 10-point policy roadmap. The initiative calls for mandatory front-of-pack labeling, HFSS taxes, strict marketing bans, and healthier school environments to curb non-communicable diseases.
Today
