PDHA1 and intervertebral disk degenerative disorder: A total of 16 cuproptosis regulators (FDX1, DLD, LIAS, LIPT1, DLST, DLAT, DBT, GCSH, PDHA1, ATP7A, ATP7B, PDHB, SLC31A1, MTF1, GLS, CDKN2A) were screened according to difference analysis between the control and IDD groups.