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Significantly increased levels of telomerase expression and activity have been observed innearly 90% of the cancer cells,making it a potential target for anti-cancer drugs.Servalanti-tumor drugs targeting telomere and telomerase such as GRN163L were developedand enter into clinical trials (phase Ⅰ/Ⅱ), but there are some disadvantages such as low specifyand high toxicity in small molecule drugs, protein drugs become a novel way to antitumorsbecause of their high specificity and low toxicity.