Age-related changes of thymalin content in human epidermis.
Khlystova. Z S ZS; Kalinina. I I II; Shmeleva. S P SP; Ryabchikov. O P OP; Khavinson. V Kh VKh
Key Findings
- Thymalin is detectable in human epidermis and fetal reticuloepithelium.
- Only young epidermal cells contain thymalin; older cells lose it.
- By age 70, the thymalin‑containing cell layer is thinned and discontinuous, indicating an age‑related decline.
Practical Outcomes
- For biohackers, the main takeaway is that thymalin levels naturally fall with age, which may contribute to skin aging. While the paper doesn’t give dosing or treatment advice, it suggests that maintaining or restoring thymalin could be a target for anti‑aging skin strategies, prompting interest in supplementation or topical approaches pending further research.
Summary
The study found that a protein called thymalin is present in the skin of both embryos and young adults, but its amount drops as people get older, especially after age 70, when the layer of thymalin‑rich cells becomes thin and broken.
Abstract
Immunomorphological analysis revealed the presence of thymalin in human epidermis and in fetal reticuloepithelium. These structures are developed from the common embryonic primordium ectoderm. In embryos and adult humans thymalin is present only in young epidermal cells, which undergo age-related involution. By the age of 70 years, the layer of thymalin-containing cells looks thinned and discontinuous. The content of thymalin, a thymic factor, decreases with age.
Study Information
pubmed
2002
10.1023/a:1020214816056