The effects of inhaling hydrogen gas on macrophage polarization, fibrosis, and lung function in mice with bleomycin-induced lung injury.
Toshiyuki Aokage, Mizuki Seya, Takahiro Hirayama, Tsuyoshi Nojima, Masumi Iketani, Michiko Ishikawa, Yasuhiro Terasaki, Akihiko Taniguchi, Nobuaki Miyahara, Atsunori Nakao, Ikuroh Ohsawa, Hiromichi Naito · BMC pulmonary medicine · 2021
Research-use notice
Independent study record
Each H2HUBB study page organizes source-linked research details for educational use. Interpretation should remain proportional to the study design, population, controls, and limitations.
H2HUBB TAKEAWAY
The results suggest that hydrogen inhalation inhibits the deterioration of respiratory physiological function and alveolar fibrosis in this model of lung injury. These preclinical findings add evidence supporting molecular hydrogen's therapeutic potential within the outcomes and biological pathways measured in this model.
What the Findings Mean
H2HUBB reviewed how inhaled hydrogen gas affected the outcomes measured in mice. The results suggest that hydrogen inhalation inhibits the deterioration of respiratory physiological function and alveolar fibrosis in this model of lung injury.
What the Researchers Studied
The researchers studied mice. The study used a preclinical animal experiment. The comparison condition was control condition or baseline measurements.
What Effects Did Molecular Hydrogen Have?
Source-reported hydrogen concentration: 4% source-reported H₂ gas concentration; Source-reported hydrogen exposure: 4% source-reported H₂ gas concentration; 800 mL/min H₂ flow; reported treatment duration: 10 min. The results suggest that hydrogen inhalation inhibits the deterioration of respiratory physiological function and alveolar fibrosis in this model of lung injury. Because hydrogen gas possesses anti-inflammatory properties, the researchers hypothesized that daily repeated inhalation of hydrogen gas could suppress persistent lung inflammation by inducing functional changes in macrophages, and consequently inhibit lung fibrosis during late-phase lung injury. Error bars: 95% CI To begin to discern the mechanisms underlying hydrogen’s protective effects in reducing fibrosis in this animal model, the researchers examined the inflammatory response 7 days after lung-injury induction.
Why These Findings Matter
These preclinical findings add evidence supporting molecular hydrogen's therapeutic potential within the outcomes and biological pathways measured in this model.
How Strong Is This Evidence?
This is preclinical animal evidence from a preclinical animal experiment. It is most informative for the disease model, mechanisms, biomarkers, and outcomes directly measured in the study.
Technical Study Details
H2HUBB classifies this publication as animal study with preclinical animal evidence. The research population or model was mice. The reported sample size was 6. The study used a preclinical animal experiment. The hydrogen delivery method was inhaled hydrogen gas. The source-reported hydrogen concentration was 4% source-reported H₂ gas concentration. The reported treatment duration was 10 min.
Limitations and Safety
No separate limitations or safety findings were identified in the source text available to H2HUBB.
Original Study and H2HUBB Research Context
H2HUBB presents this source-grounded research record as one contribution to the broader molecular-hydrogen evidence base.