title: Gabapentin Differentially Modulate c-Fos Expression in Hypothalamus and Spinal Trigeminal Nucleus in Surgical Molar Extraction.
abstract: The study on the efficacy of oral analgesics reported that no single class of drug is effective in post-surgical dental pain. Pain following removal of third molar is most commonly used and widely accepted acute pain model for assessing the analgesic effect of drugs in humans. Reports demonstrated that analgesic efficacy in the human dental model is highly predictive. The high incidence of false-negative findings in analgesic investigations hinders the process of molecular discovery. Molecular mechanism of post-surgical pain is not known. More importantly, the animal model for postoperative dental pain is not well established. In an attempt to discover an effective post-surgical dental pain blocker with acceptable side effects, it is essential to elucidate the molecular mechanism of post-operative dental pain. The present study investigated mandibular molars extraction in rat as an animal model for the post-operative dental pain in central nervous system. Using c-Fos immunohistochemistry, we demonstrated that pre administration of GBP (150 mg/kg. i.p) significantly (p< 0.01) neutralized the surgical molar extraction induced c-Fos expression bilaterally in rat hypothalamus. Present results indicate that pain after surgical molar extraction might follow novel neural pathways therefore difficult to treat with existing anti-nociceptive drugs.
authors.affiliation: Universiti Teknologi MARA (UiTM), Jalan Hospital, Sungai Buloh, Selangor, Malaysia.
authors.forename: Jamil Ahsan
authors.initials: JA
authors.lastname: Kazi
authors.affiliation: Universiti Teknologi MARA (UiTM), Jalan Hospital, Sungai Buloh, Selangor, Malaysia.
authors.forename: Ban Kahtan
authors.initials: BK
authors.lastname: Ibrahim
mesh_terms: D000588:Amines / Q000494:pharmacology* / Q000627:therapeutic use; D000818:Animals; D003509:Cyclohexanecarboxylic Acids / Q000494:pharmacology* / Q000627:therapeutic use; D000077206:Gabapentin; D007031:Hypothalamus / Q000187:drug effects* / Q000378:metabolism; D008297:Male; D010149:Postoperative Pain / Q000188:drug therapy*; D016760:Proto-Oncogene Proteins c-fos / Q000378:metabolism*; D051381:Rats; D017207:Rats, Sprague-Dawley; D014081:Tooth Extraction / Q000009:adverse effects / Q000379:methods*; D014279:Trigeminal Nucleus, Spinal / Q000187:drug effects* / Q000378:metabolism; D005680:gamma-Aminobutyric Acid / Q000494:pharmacology* / Q000627:therapeutic use
chemical_list: D000588:Amines; D003509:Cyclohexanecarboxylic Acids; D016760:Proto-Oncogene Proteins c-fos; D005680:gamma-Aminobutyric Acid; D000077206:Gabapentin