Patent ID: 8222393

Claim:
A cell growth inhibitor comprising as an active ingredient a polynucleotide reagent that inhibits expression of SEQ ID NO:13, wherein the reagent inhibiting the expression is: (1) a double-stranded RNA that decreases the SEQ ID NO:13 mRNA level through RNA interference, and the double-stranded RNA consists of RNA that is 19 to 23 nucleotides in length having at least 90% homology to SEQ ID NO: 1 and RNA that is 19 to 23 nucleotides in length having at least 90% homology to SEQ ID NO: 2; or (2) a DNA encoding a double-stranded RNA that decreases the SEQ ID NO:13 mRNA level through RNA interference, and the double-stranded RNA consists of RNA that is 19 to 23 nucleotides in length having at least 90% homology to SEQ ID NO:1 and RNA that is 19 to 23 nucleotides in length having at least 90% homology to SEQ ID NO:2.