title: [Research on the expression of Survivin and PTEN in laryngeal squamous cell carcinoma transplanted on the back sides of nude mice treated by gold throat tablets].
abstract: OBJECTIVE
  To explore the positive expressing rates of oncogene Survivin and tumor-suppressor gene PTEN in transplanted laryngo-carcinoma of nude mice treated by Gold Throat Tablets (GTT) which can improve circulation and remove haemostasis in TCM theory.
  
  
  METHODS
  The 32 nude mice seeded with cultured laryngeal carcinoma cells subcutaneously at the back were randomly divided into high, middle, low (according to 6 : 3: 1 proportion of GTT dosing given by intragastric administration) dose groups and blank control groups. The changes on weight and size of tumors originated from these cells were observed for 28 days, and the density of tumors and expression of Survivin and PTEN were examined with tumor sections by immunohistochemical assay after separating tumors from back of nude mice.
  
  
  RESULTS
  The weight and size of subcutaneous laryngo-carcinoma on backs of high dose group nude mice were both the smallest among all the experimental groups with the average density of tumors as 1.202 g/cm3. The positive expressing rates of Survivin and PTEN both revealed the following tendency that high dose group < middle dose group < low dose group < blank control group.
  
  
  CONCLUSIONS
  Six times of regular doses of GTT can prevent overgrowth of laryngo-carcinoma transplanted on nude mice and decrease the excessive expression of oncogene Survivin in the tumor. PTEN, expressing lower than Survivin in all groups, shows a subordinative relationship with it, maybe due to a competition mechanism.
authors.affiliation: Department of Otolaryngology, Second Affiliated Hospital of Guangzhou University of Traditional Chinese Medicine, 510120 Guangzhou, China.
authors.forename: Qiangzhong
authors.initials: Q
authors.lastname: Guo
authors.forename: Yunying
authors.initials: Y
authors.lastname: Li
mesh_terms: D000818:Animals; D002294:Carcinoma, Squamous Cell / Q000378:metabolism* / Q000473:pathology; D045744:Cell Line, Tumor; D004365:Drugs, Chinese Herbal / Q000494:pharmacology*; D005260:Female; D006801:Humans; D051034:Inhibitor of Apoptosis Proteins / Q000378:metabolism*; D007822:Laryngeal Neoplasms / Q000378:metabolism* / Q000473:pathology; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008819:Mice, Nude; D012097:Repressor Proteins / Q000378:metabolism*; D000077022:Survivin
chemical_list: C107489:BIRC5 protein, human; C117749:Birc5 protein, mouse; D004365:Drugs, Chinese Herbal; D051034:Inhibitor of Apoptosis Proteins; D012097:Repressor Proteins; D000077022:Survivin