Stem-like T-cell reservoir helps explain persistent kidney transplant immunity
Published in Biology, Immunology, Journals.
Published November 1, 2026.
A Nature Communications study published on October 31 investigates why immune responses against a transplanted kidney can persist for years rather than simply becoming exhausted.
Zou and colleagues examined rejected human kidney grafts obtained approximately ten years after transplantation. They found overlapping CD8 T-cell clones in blood and graft tissue. Circulating cells retained a TCF1-positive, stem-like state, while related cells in the graft became cytotoxic effectors.
In mouse experiments, stem-like cells renewed themselves and repeatedly generated short-lived effectors across serial transplantations. Effector cells alone did not sustain rejection after transfer into secondary hosts. The experiments also implicated TCF1 and lactate dehydrogenase A in regulating effector differentiation.
The findings distinguish persistent immune reservoirs from their short-lived descendants. Human observations and mouse mechanism experiments do not establish that targeting this pathway safely prevents rejection in patients, and they do not justify changing immunosuppressive treatment. The authors report no competing interests. This peer-reviewed accepted article remains subject to editorial changes.
Source: Zou et al., Nature Communications, October 31, 2026.