•PABP-1 and eIF4G are present in NCIs in patients with FUS pathology.•PABP-1 IHC shows highly immunoreactivity in NCIs in ALS's spinal cord MNs, BIBD, FTLD-u's hippocampus and NIFID but not detected in FTLD-TDP's hippocampus.•PABP-1 colocalized with p62 in same brain regions in ALS, FTLD-u, NIFID and BIBD but not in FTLD-TDP.•eIF4G was not detected in FTLD-TDP. Here, EIF4G1 is linked to amyotrophic lateral sclerosis.