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Orange Hair Pigment Fights Cell Damage
13 Jul
Summary
- Pheomelanin production helps balance harmful cysteine levels in cells.
- This pigment acts as a cellular protector against damage.
- The findings offer a new perspective on red hair's evolutionary persistence.
A groundbreaking study suggests that the pigment responsible for orange-red hair, known as pheomelanin, may offer significant health advantages. Researchers have discovered that pheomelanin production actively helps cells manage cysteine levels, a crucial protein component.
Excessive cysteine can lead to cellular damage and death. However, pheomelanin synthesis appears to draw down these excess levels, converting them into an inert pigment. This process prevents cellular harm and maintains a critical balance within cells.
Experiments with zebra finches provided key evidence. Birds given a substance blocking pheomelanin synthesis showed more cell damage when exposed to excess cysteine, compared to those producing the pigment.
These findings suggest pheomelanin's role in "cysteine homeostasis" could explain the evolutionary persistence of traits associated with orange hair, despite potential melanoma risks. This research opens new avenues for understanding melanoma risk influenced by environmental factors affecting cysteine availability.
