Why can chronic inflammatory disease make some body tissues age faster than others?

Answer: Ongoing inflammation stresses many tissues, so aging speeds up where it lasts longest.

The disease affects immune cells only, so aging speeds up only inside the immune system. — Wrong. This gets the immune involvement almost right: immune cells do respond to inflammation and can show aging-related changes. But inflammation is not confined to immune cells; signaling molecules can act across multiple tissues and cell types. That broader exposure helps explain why aging can speed up outside the immune system too.

Ongoing inflammation stresses many tissues, so aging speeds up where it lasts longest. ✓ — Correct! Chronic inflammatory disease can keep inflammation-related signaling active in many tissues, not just immune cells. Tissues that carry that signaling longer can show faster aging-related changes, while less exposed tissues age more slowly. The unevenness comes from where and how long the inflammatory stress persists.

The disease affects the whole body evenly, so every tissue ages at the same rate. — Wrong. This gets the whole-body reach almost right: chronic disease can affect many organs and circulating signals. But it assumes the effect is even. Tissues differ in how much inflammation-related signaling they receive and how long they are exposed, so aging can speed up unevenly.