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Here , we show that overexpression of miR - 194 in lung cancer cell lines , results in suppressing metastasis of lung cancer cells , while inhibiting its expression through ' miRNA sponge ' promotes the cancer cells to metastasize .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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