TUSC2P1 and neoplasm: To examine the consequences of TUSC2 and TUSC2P down-regulation, siRNAs for TUSC2 (si-TUSC2/ TUSC2P) which can suppress both TUSC2 and TUSC2P expression was transfected into EC109 cells or TE-1 cells Transfection of si-TUSC2/ TUSC2P in EC109 and TE-1 cell reduced TUSC2 expression (Fig. 4a and b), and thus accelerated cell proliferation (Fig. 4c) and invasion (Fig. 4d), decelerated apoptosis (Fig. 4e), indicating that TUSC2 and its pseudogene have important roles in tumor cell biology.