[Influence of SEPT7 on biological characters of glioma cell line TJ905].
OBJECTIVE
To investigate the influence of SEPT7 on biological characters of gliomas cells TJ905.


METHODS
Recombinant SEPT7 constructs was transfected to human glioblastoma cell line TJ905 in which SEPT7 expression is absent. The positive clones were identified by RT-PCR and Western blot analysis. The cell proliferation was determined by MTT assay and flow cytometry, cell apoptosis was detected with Annexin V staining and cell invasion was evaluated by motility in three-dimensional culture. Moreover, the molecules regulating the cell cycle progression were examined by immunofluorescence staining and Western blot analysis.


RESULTS
When SEPT7 was successfully transfected to TJ905 cells, the cell proliferation activity of TJ905 cell was inhibited, the cell cycle was arrested in G0/G1 phase and S phase fraction (SPF) was lowered, the positive regulatory molecules for cell cycle progression including cyclin D1, CDk4, cyclin E and CDk2 were downregulated while the negative modulators including p16 and p21 were upregulated, apoptotic cells were increased and cell invasive ability was attenuated.


CONCLUSIONS
Transfection of SEPT7 construct into the glioma cells TJ905 is able to inhibit the proliferation activity and invasive ability of TJ905 cell and to induce cell apoptosis. These results revealed that SEPT7 exerted the suppressive effect on the glioma cell growth and invasion, and induced apoptosis, and suggested that SEPT7 as a gene of glioma suppressor.
Jia
Zhi-Fan
ZF
Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin Neurological Institute and Laboratory of Neuro-Oncology, Tianjin, China.
Pu
Pei-Yu
PY
Kang
Chun-Sheng
CS
Wang
Guang-Xiu
GX
Zhang
Zhi-Yong
ZY
Qiu
Ming-Zhe
MZ
Huang
Qiang
Q
D017209:Apoptosis; D015153:Blotting, Western; D001932:Brain Neoplasms / Q000235:genetics / Q000378:metabolism / Q000473:pathology; D002453:Cell Cycle; D018797:Cell Cycle Proteins / Q000235:genetics / Q000378:metabolism / Q000502:physiology*; D045744:Cell Line, Tumor; D049109:Cell Proliferation; D002470:Cell Survival; D005434:Flow Cytometry; D005455:Fluorescent Antibody Technique; D005910:Glioma / Q000235:genetics / Q000378:metabolism / Q000473:pathology; D006801:Humans; D020133:Reverse Transcriptase Polymerase Chain Reaction; D058112:Septins; D014162:Transfection
D018797:Cell Cycle Proteins; C113158:SEPTIN7 protein, human; D058112:Septins