Figure 5: Radiotherapy reduced TCI-induced increase of IL-1β and TNF-α in the spinal cord. IL-1β and TNF-α concentrations were analyzed by ELISA. The tissues were collected on postoperative days 10 and 14, that is, 1 and 5 days after radiotherapy, respectively. Four samples were included in each group and each sample included a segment of the spinal cord at L4-L5. versus sham; versus TCI + sham.