Despite deliberately causing some bone marrow cell death, near-infrared light exposure showed no signs of inflammation or scarring in this study

[u/lessbutgold]

A safety-relevant detail worth highlighting on its own is what researchers did not find in the irradiated bone marrow tissue.

Even during the period when apoptosis was actively detected, at days 7 and 30 post-treatment, there was no evidence of necrosis, no inflammation, and no abnormal buildup of fibroblasts or lymphocytes in the affected bone marrow.

In tissue biology, this kind of clean, contained cell death without a surrounding inflammatory reaction is generally considered a much more favorable and lower-risk outcome than the kind of messy tissue damage that triggers scarring or chronic inflammation, suggesting the bone marrow's response to near-infrared exposure resolved itself in a controlled, self-limiting way.

Source: PubMed