Moreover, the conjugation of HA-AuNPs with inhibitor of apoptosis protein-2 specific-RNA (IAP-2 siRNA) led to silencing of the IAP-2 expression, the decreasing of cell proliferation and the triggering of pronounced cell apoptosis; thus, HA-AuNPs could be considered as a promising tool for the therapy of lung cancer [26]. The gene discussed is BIRC2; the disease is lung cancer.