According to the results of a study published recently by the International Journal of Molecular Sciences, low doses of cannabidiol (CBD) may help protect the developing heart from damage caused by high oxygen exposure, a common risk for babies born prematurely.
The research was conducted by scientists from Charité-Universitätsmedizin Berlin, who examined how neonatal exposure to elevated oxygen levels affects heart development and whether CBD could reduce resulting injury. Premature infants are often exposed to supplemental oxygen, which can trigger oxidative stress and inflammation that interfere with normal cardiac maturation and increase long-term cardiovascular risk.
In the study, newborn mice were exposed to 80% oxygen for 48 hours during a critical developmental window and treated with either a low or high dose of CBD. Compared with control animals raised in normal air, hyperoxia-exposed mice showed marked increases in inflammatory markers, disrupted regulation of apoptosis and autophagy, and a roughly 50% reduction in cardiomyocyte proliferation by postnatal day 14. These changes were accompanied by thicker heart walls, fibrosis, and other signs of adverse cardiac remodeling.
CBD treatment significantly blunted many of these effects. The lower dose preserved cardiomyocyte proliferation, reduced abnormal wall thickening, and helped normalize autophagy-related pathways, while both doses reduced fibrosis and cell death. Notably, the higher CBD dose failed to protect proliferative capacity, pointing to a narrow therapeutic window. Researchers also observed sex-specific differences, with male mice showing more severe long-term damage from hyperoxia and greater responsiveness to low-dose CBD.
Researchers conclude the study by stating “These findings identify CBD as a potential cardioprotective modulator of neonatal hyperoxia-induced injury and highlight the importance of dose- and sex-specific mechanisms in early cardiac maturation.”
More articles from The Marijuana Herald can be found below.
