PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 19912951-1 1993 We have demonstrated previously that chronic morphine and cocaine treatments increase levels of tyrosine hydroxylase (TH), and decrease levels of neurofilament (NF) proteins, in the ventral tegmental area (VTA), a major dopaminergic brain reward region, of outbred Sprague-Dawley rats. Morphine 45-53 tyrosine hydroxylase Rattus norvegicus 96-116 19912951-1 1993 We have demonstrated previously that chronic morphine and cocaine treatments increase levels of tyrosine hydroxylase (TH), and decrease levels of neurofilament (NF) proteins, in the ventral tegmental area (VTA), a major dopaminergic brain reward region, of outbred Sprague-Dawley rats. Morphine 45-53 tyrosine hydroxylase Rattus norvegicus 118-120