Normobaric Oxygen and Stem Cells : What the Research Shows

Explore research on normobaric oxygen and stem cells mobilization.

Normobaric Oxygen and Stem Cell Mobilization: What the Research Actually Shows

Stem cells play an important role in the body’s normal processes of maintenance and repair. Because of this, researchers have been interested in understanding whether changes in oxygen exposure can influence the behaviour and circulation of stem and progenitor cells.

One area now being investigated is normobaric oxygen and stem cell mobilization.

A human study published in Frontiers in Cell and Developmental Biology examined what happened to circulating stem/progenitor cells and certain cytokines after repeated exposure to 100% oxygen at normal atmospheric pressure.

The findings are interesting, but they also need to be understood in context.

What Is Stem Cell Mobilization?

Stem and progenitor cells normally exist throughout the body, including within bone marrow.

The term stem cell mobilization generally refers to an increase or change in stem/progenitor cells circulating in the bloodstream.

Researchers study these cells because of their involvement in normal biological processes associated with tissue maintenance, blood-vessel formation and repair.

Importantly, detecting changes in circulating stem-cell populations does not automatically mean that a treatment has been proven to heal an injury or treat a disease.

That distinction is important when looking at oxygen research.

What Did the Normobaric Oxygen Study Examine?

Researchers studied healthy volunteers between 30 and 35 years old.

Participants were exposed to 100% normobaric oxygen for 60 minutes per session, Monday through Friday, for a total of 10 exposures over two weeks.

Blood samples were collected at several points:

Before the first oxygen exposure
Immediately after the first exposure
Before the ninth exposure
Three days after the final exposure

Researchers then examined different stem/progenitor-cell populations and cytokine levels.

What Did Researchers Find?

After repeated normobaric oxygen exposure, researchers observed significant mobilization of certain stem/progenitor-cell populations, including cells characterized by CD34 and CD133 markers.

Other immature cell phenotypes decreased, which the researchers suggested could represent differentiation toward more mature phenotypes.

The study also found increased levels of two cytokines: macrophage migration inhibitory factor (MIF) and APRIL.

Some of the observed changes remained detectable three days after the final oxygen exposure.

Why Is This Research Interesting?

Oxygen’s relationship with stem-cell activity has previously received attention in hyperbaric oxygen therapy, where oxygen is administered at pressures above normal atmospheric pressure.

Research has reported stem/progenitor-cell mobilization following hyperbaric oxygen exposure as well.

The newer normobaric research raises an interesting question:

Can oxygen exposure at normal atmospheric pressure influence some of the same biological pathways?

The study provides evidence that certain biological changes can occur under normobaric conditions.

However, considerably more research is needed before those findings can be translated into specific clinical outcomes.

What This Study Does NOT Tell Us

This is one of the most important parts of understanding the research.

The study examined biological markers in healthy adults.

It did not demonstrate that normobaric oxygen:

cures disease
reverses aging
heals injuries faster
treats chronic pain
regenerates damaged organs
treats neurological disorders
replaces established medical treatments

Those questions would require additional clinical research involving larger populations and specific medical conditions.

The findings should therefore be viewed as an interesting area of emerging oxygen research rather than proof of a particular medical treatment.

Normobaric Oxygen vs. Hyperbaric Oxygen

These terms are sometimes confused.

Hyperbaric oxygen therapy (HBOT) involves breathing oxygen in an environment pressurized above normal atmospheric pressure.

Normobaric oxygen (NBO) refers to oxygen delivered without that elevated environmental pressure.

Although researchers have investigated both approaches, findings involving hyperbaric oxygen shouldn’t automatically be assumed to apply to normobaric environments.

That’s another reason research specifically examining normobaric oxygen is valuable.

Where Could the Research Go Next?

The study opens several interesting questions.

Researchers could investigate whether the observed stem/progenitor-cell changes occur in larger and more diverse populations, how long those changes persist, whether different oxygen concentrations or exposure schedules produce different responses, and—most importantly—whether changes in these biological markers eventually translate into meaningful clinical outcomes.

Those questions remain open.

Experience Normobaric Oxygen in Toronto

At Normobaric Wellness Centre, we’re interested in the developing science surrounding oxygen-rich environments and human wellness.

Our sessions take place in a controlled normobaric chamber designed to provide an oxygen-enriched environment while maintaining pressures far below those used in traditional hyperbaric oxygen therapy.

If you’re curious about the experience, you can learn more about normobaric oxygen therapy, explore our other educational resources, or book a session at our Toronto location.

For easier access to our website, visit normobaric.ca.

Research referenced

MacLaughlin KJ, Barton GP, MacLaughlin JE, et al. 100% oxygen mobilizes stem cells and up-regulates MIF and APRIL in humans: a new point on the hormetic dose curve of oxygen. Frontiers in Cell and Developmental Biology. DOI: 10.3389/fcell.2024.1377203.

The study, conducted by a team of researchers led by Dr. Kent J. MacLaughlin, explored how NBO influences stem cell activity and cytokine expression.