DDIT4 and temporal arteritis: Although the previous results revealed that BCL2, a DDIT4+ memory T cell in the GCA group, exhibited heightened protein activity, given that BCL2 is regulated by TNF-α and DDIT4 influences the expression of TNF-α, we elected to examine MCL1, which performs a comparable function to BCL2, to elucidate the impact of DDIT4 on apoptosis.