The downstream target genes upregulated in aged MTC to Crlf1/Lifr pair functioned in inflammatory response (Abl1, Elmo1, Tpm1, Aldoa, Bhlhe40, Cirbp, Elf3, Smad7), cell cycle arrest (Btg2, Cdkn1a, Dusp1), cellular senescence (Cpeb4, Ier2), maintenance of stem cell quiescence (Hes1), cell death (Slc2a1, Zfp36, Dusp1), and innate immunity (Hk1, Irf9, Pim1) (Figure 4f). The gene discussed is ZFP36; the disease is medullary thyroid gland carcinoma.