Molecular Hydrogen Modulates the Baroreflex Activity and Reduces the Vascular Adrenoreceptor Sensitivity to Phenylephrine and Lung Inflammation in Rats with Pulmonary Hypertension.
Marina Artemieva, Larisa Kozaeva, Tatyana Kuropatkina, Khaidar Gufranov, Dmitrii Atiakshin, Natalia Medvedeva, Oleg Medvedev · Biomedicines · 2026
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Independent study record
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H2HUBB TAKEAWAY
In a laboratory model, experiments on isolated aortic preparations from MCT rats showed that the addition of H₂ to the perfusion medium resulted in a 30% reduction in the maximal response to PE compared with the MCT group without hydrogen (p < 0.01), and the potency of PE (EC50) decreased threefold (p < 0.05). These findings come from a laboratory model and suggest molecular hydrogen's biological potential. Further research is needed to determine clinical relevance.
What the Researchers Tested
In vitro cell-culture laboratory experiment.
How Molecular Hydrogen Was Used
Cages with the rats of the MCT-H₂ and Control-H₂ groups were ventilated with air containing 4% H₂ twice daily for 2 h each. In in vitro experiments, the researchers studied the effect of adding H₂ to the perfusion solution on the responsiveness of isolated aortic preparations from MCT and control rats to the α1-adrenoceptor agonist PE and the vasodilators NP and Acetylcholine.
What Molecular Hydrogen Changed
Experiments on isolated aortic preparations from MCT rats showed that the addition of H₂ to the perfusion medium resulted in a 30% reduction in the maximal response to PE compared with the MCT group without hydrogen (p < 0.01), and the potency of PE (EC50) decreased threefold (p < 0.05).
Proposed Mechanism
Background/Objectives: Molecular hydrogen (H₂), a natural antioxidant, can selectively reduce hydroxyl radicals and peroxynitrite without affecting signaling molecules such as H₂O₂ and NO.
Authors’ Conclusion
These findings come from a laboratory model and suggest molecular hydrogen's biological potential. Further research is needed to determine clinical relevance.