Molecular and Cellular Biochemistry

, Volume 343, Issue 1–2, pp 231–238 | Cite as

Stable knockdown of TPPP3 by RNA interference in Lewis lung carcinoma cell inhibits tumor growth and metastasis



Tubulin polymerization promoting protein 3 (TPPP3), a member of the TPPP family, can induce tubulin polymerization and microtubule bundling. Previously, it has been shown that TPPP3 plays an important role in cell proliferation. Depletion of TPPP3 by microRNA-based RNA interference (RNAi) inhibits cell growth, arrests cell cycles, and causes mitotic abnormalities in HeLa cells. In the present study, we knocked down TPPP3 in Lewis lung carcinoma (LLC) cells with the same RNAi construct, and observed a retarded tumor cell growth in vitro. Furthermore, C57BL/6 mice that received subcutaneously injected LLC cells in which TPPP3 was knocked down showed a pronounced reduction in tumor progression. The migration/invasion activity of TPPP3-knockdown LLC cells was significantly suppressed in a transwell chamber migration assay. When these cells were injected into the tail veins of C57BL/6 mice, they exhibited milder lung metastasis compared with control tumor cells. Taken together, these findings suggested that the TPPP3 gene played an important role in tumorigenesis and metastasis, and it could potentially become a novel target for cancer therapy.


TPPP3 RNAi Lewis lung carcinoma Tumor growth Migration Metastasis 



This work was supported by grants to Prof. RM Hu from National Natural Science Foundation of China (Grant number: 30670999 and 30770854), Shanghai Science and Technology Commission (08dj1400605, 08JC1403200), and National Key Basic Research and Development Program (Grant number: 2002CB713703).


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Copyright information

© Springer Science+Business Media, LLC. 2010

Authors and Affiliations

  • Wenbai Zhou
    • 1
  • Jiada Li
    • 2
  • Xuanchun Wang
    • 1
  • Renming Hu
    • 1
  1. 1.Department of Endocrinology and Metabolism, Institute of Endocrinology and Diabetology, Huashan Hospital, Shanghai Medical CollegeFudan UniversityShanghaiChina
  2. 2.The State Key Laboratory of Medical GeneticsCentral South UniversityChangshaChina

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