The Different Effects of Immunosuppressants on Progress and Metastasis of Mice Bladder Cancer
DOI:
Author:
Affiliation:

Clc Number:

Fund Project:

The work was supported by grants from Shanghai Medical Centre of Organ Transplantation (QY-040101-10), Foundation of Yung Scientists of The Health Bureau of Shanghai (024Y05) and Shanghai Rising-Star Program (04QMX1417).

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    Abstract:

    The different effects of cyclosporine and rapamycin on tumor progress and metastasis and their mechanisms were investigated. BTT-T739-gfp cell line stably expressed green fluorescence protein was intracutaneously inoculated into 24 mice. One week later, the mice were randomly divided into 3 groups and treated intraperitoneally by normal saline (as control), cyclosporine and rapamycin respectively. Survival rate and tumor volume were measured. The tumor metastasis, pathological angiogenesis and expression of angiogenesis-associated genes were analyzed. The metastasis analysis in lung and liver were also accomplished under the fluorescent microscope. Compared with the normal saline and cyclosporine, the general immunosuppressive dosage of rapamycin effectively inhibited the progress and metastasis of the established tumors. It was the rapamycin that improved the survival rate of tumor-beared mice and decreased the developmental velocity of tumor volume, to which was significantly different from the control and cyclosporine groups on the 12th day and 14th day. Experimentally, rapamycin inhibited tumor growth through angiogenesis and metastases repression in the established mouse model. From a mechanistic perspective, rapamycin showed anti-angiogenetic activities related to decrease of VEGF-A production which was a result of the down-regulation on the transcriptional level of VEGF-A and its transcription activator HIF-1α. It implied that conventional immunosuppressants showed different therapeutic roles on established tumors. Rapamycin, not cyclosporine could inhibit the tumor growth and metastasis of which was referred to anti-angiogenesis.

    Reference
    Related
    Cited by
Get Citation

LIU Yong, WANG Feng, YUAN Lin, HU Hong-Hui, TANG Xiao-Da. The Different Effects of Immunosuppressants on Progress and Metastasis of Mice Bladder Cancer[J]. Progress in Biochemistry and Biophysics,2007,34(12):1314-1320

Copy
Share
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:May 10,2007
  • Revised:August 05,2007
  • Accepted:
  • Online: August 09,2007
  • Published: