Supercentenarians have an abundance of cancer-killing immune cells

The human immune system has specialized cells called CD4 cytotoxic T lymphocytes (CD4 CTLs), which have been shown to kill tumor cells in some cancers. When a person gets sick, these cells multiply in a process called clonal expansion to help fight infection. In a study published in the journal Cell Reports on Aug. 19, researchers show that these immune cells also may play a role in healthy aging among supercentenarians.

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