TBNBiotech
Sulfur, Right There All Along
Publication: AAAS: Keyword search for query
Author: Not available in collected metadata
Source published: 19/10/2026, 11:31:44 UTC
Briefing created: 19/10/2026, 15:51:06 UTC
Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 19/10/2026, 15:49:31 UTC.
Briefings
A recent study reveals that humans store and utilize elemental sulfur (S8) in mitochondria and lipid droplets, a previously unknown function in mammals. The research utilized Raman spectroscopy and mass spectrometry to detect S8 signatures, which were previously thought to be exclusive to prokaryotes. The study estimates normal human cells contain tens of grams of elemental sulfur, with levels exceeding 100mM in cancerous tissue. The authors suggest S8 may function as an antioxidant, potentially preventing lipid peroxidation, and is synthesized by endothelial nitric oxide synthase (eNOS).
Key points
- Human cells contain elemental sulfur (S8) stored in mitochondria and cellular lipid droplets, a previously unknown function in mammals.
- Elemental sulfur levels in cancerous tissue were estimated to exceed 100mM, significantly higher than normal levels.
Context
This finding challenges the assumption that sulfur metabolism is limited to prokaryotes, as the study confirms S8 is actively handled in higher animals. The discovery of S8 storage in human mitochondria and lipid droplets suggests a novel role for elemental sulfur in cellular defense mechanisms, potentially acting as an antioxidant to prevent lipid peroxidation.
Limitations
The study relies on Raman spectroscopy and mass spectrometry techniques to detect S8 signatures, which may have limitations in sensitivity or specificity. The estimate of tens of grams of elemental sulfur in human cells is based on current data and may vary across individuals. The authors speculate on the antioxidant function of S8, but cellular assays and functional studies are needed to confirm this hypothesis.
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