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Northern analysis of mRNA from hypoxic ECs also demonstrated increased levels of mRNA for macrophage chemotactic protein-1 , another member of the chemokine superfamily of proinflammatory cytokines .
 ECs, macrophage chemotactic protein-1, proinflammatory cytokines, mRNA, chemokine superfamily
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 ECs, macrophage chemotactic protein-1, proinflammatory cytokines, mRNA, chemokine superfamily