Interleukin-2 and aging: decreased interleukin-2 production in healthy older people does not correlate with reduced helper cell numbers or antibody response to influenza vaccine and is not corrected in vitro by thymosin alpha 1.
Ershler. W B WB; Moore. A L AL; Roessner. K K; Ranges. G E GE
Key Findings
- Elderly lymphocytes produce less interleukin‑2 than those from younger people.
- Low IL‑2 production correlates with reduced cell proliferation but not with lower helper T‑cell numbers or weaker vaccine antibody response.
- Thymosin‑alpha‑1 did not consistently increase IL‑2 production in vitro.
Practical Outcomes
- Thymosin‑alpha‑1 is unlikely to be an effective stand‑alone supplement for boosting IL‑2 or improving vaccine responses in older adults, so biohackers should not rely on it for immune‑aging benefits without stronger evidence.
Summary
In healthy older adults, immune cells make less interleukin‑2, but this isn’t tied to fewer helper T cells or weaker flu‑vaccine antibody responses, and adding thymosin‑α1 in the lab didn’t reliably raise IL‑2 levels.
Abstract
The capacity of lymphocytes obtained from healthy young or old volunteers to produce interleukin-2 was measured and the results were compared with other measures of immune function. The in vitro effect of thymosin alpha 1 on interleukin-2 production was also measured. Interleukin-2 was lower in lymphocytes from the elderly, and individuals with low production also had lower proliferative responses in vitro to phytohemagglutinin. These individuals did not have a reduced helper T-cell number, abnormal ratio of helper to suppressor T-cells or reduced antibody production in response to vaccine. Thymosin alpha 1 did not have a consistent effect on interleukin-2 production.
Study Information
pubmed
1985
1985-08-01T00:00:00.000Z
10.1016/0162-3109(85)90054-2
24
16