Abstract:
PURPOSE: A composition for enhancing radiosensitivity, which containing microRNA-21 inhibitor is provided to enhance radiosensitivity of cancer cells and the effect of radiation therapy. CONSTITUTION: A composition for enhancing radiosensitivity contains microRNA-21 inhibitor. The microRNA-inhibitor is antisense nucleic acid molecule which complementarily binds to the microRNA-21 sequence. The microRNA-inhibitor is siRNA(small interfering RNA), RNA aptamer, or ribozyme which is specific to the microRNA. The antisense nucleic acid molecule is anti oligonucleotide. The length of the anti oligonucleotide is 15-40 nucleotide. The anti oligonucleotide comprises sequence of the sequence number 1. The anti oligonucleotide is contained in an expression vector for intracellular delivery. The expression vector is lentivirus, retrovirus, adenovirus, herpes virus, or avipox virus.
Abstract:
PURPOSE: An anticancer composition containing micro RNA-125 nucleic acid molecule is provided to treat angiogenesis-associated diseases and to suppress cancer cell invasion and metastasis. CONSTITUTION: A composition for suppressing angiogenesis in hypoxic condition contains human-derived microRNA-125a, microRNA-125b1, or microRNA-125b2. A marker composition for diagnosing brain cancer or brain tumor contains an agent which measures microRNA-125 expression level. The microRNA-125 nucleic acid molecule suppresses cancer cell invasion and metastasis. The microRNA-125 nucleic acid molecule is used in treating angiogenesis-associated diseases, especially cancer, which are induced in hypoxia condition.