title: Effect of octreotide on cell-cycle kinetics and serum carcinoembryonic antigen level in hepatic metastases of colonic adenocarcinoma.
abstract: OBJECTIVE
  To study the inhibitory effect of somatostatin analogue (octreotide) on tumor growth.
  
  
  METHODS
  The influence of cell-cycle kinetics on hepatic metastases of BALB/c mice colonic adenocarcinoma (CT26) with octreotide treatment in vivo was investigated by flow cytometry. The serum carcinoembryonic antigen (CEA) levels were also determined.
  
  
  RESULTS
  The results showed that the proliferative index (PI) and the S-phase fraction in hepatic tumors of mice treated with octreotide decreased markedly and that the G0/G1 serum CEA phase fraction increased significantly in comparison with the control (P < 0.01). After administration of octreotide, the serum CEA levels were also lower than those in the control group. The incidence of liver metastases in the treated group was lower than that in the control. The body weight loss in the mice was slower and survival was longer in the treated group than in the control group. Furthermore, the changes in PI and the fraction distribution of S-phase or G0/G1-phase in cell cycle were closely related to the serum CEA levels.
  
  
  CONCLUSIONS
  Octreotide may be useful for inhibiting the hepatic metastases of colonic carcinoma.
authors.affiliation: Rui Liu, Yuan-He Wang, Yan Tang, Gui-Song Cao, Department of Surgery, Changhai Hospital, Shanghai 200433, China.
authors.forename: R
authors.initials: R
authors.lastname: Liu
authors.affiliation: Rui Liu, Yuan-He Wang, Yan Tang, Gui-Song Cao, Department of Surgery, Changhai Hospital, Shanghai 200433, China.
authors.forename: Y H
authors.initials: YH
authors.lastname: Wang
authors.affiliation: Rui Liu, Yuan-He Wang, Yan Tang, Gui-Song Cao, Department of Surgery, Changhai Hospital, Shanghai 200433, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Tang
authors.affiliation: Rui Liu, Yuan-He Wang, Yan Tang, Gui-Song Cao, Department of Surgery, Changhai Hospital, Shanghai 200433, China.
authors.forename: G S
authors.initials: GS
authors.lastname: Cao
keywords: Carcinoembryonic antigen/analysis; Colonic neoplasms; Cytometry; Liver neoplasms/secondary; Octreotide; adenocarcinoma