passages.id: split_8_test_3307_passage
passages.type: progene_text
passages.text: The expressions of neuronal markers neural specific enolase ( NSE ) , neurofilament ( NF ) , glial cell marker , glial fibrillary acedic protein ( GFAP ) , and enteric neuronal marker protein gene product 9.5 ( PGP9.5 ) , neural nitric oxide synthase ( nNOS ) , and enteric neural transmitter vasoactive intestinal polypeptide ( VIP ) were detected by fluorescent immunohistochemistry .