passages.id: split_6_test_2125_passage
passages.type: progene_text
passages.text: Comparison of messenger RNA gene expression of extracellular matrix proteins ( procollagen I , collagenase , elastin , hyaluronic acid synthase 2 , hyaluronidase , fibronectin , cd44 , fibromodulin , and decorin ) across cell passages ( 3 , 4 , 5 , 6 , 10 , and 12 fornormal laminapropria and 3 , 4 , 5 , 6 , and 10 for tracheal scar ) revealed varied growth patterns .