Abstract | PURPOSE: To assess whether the Pax6 gene is involved in the development of retinoblastoma. METHODS: Three human retinoblastoma cell cultures were transfected with human Pax6 specific double-stranded, small interfering siRNA molecules RH-1 and RH-2. In addition, untreated control groups and negative control groups (CT groups) transfected with siRNA without homology to the human genome were formed for all three cell culture lines. RESULTS: After Pax6 gene was silenced by siRNA, the percentage of tumor cell survival decreased significantly (P < 0.05). Correspondingly, the percentage of apoptotic cells to total cells was significantly (P < 0.05) higher in the three retinoblastoma cell lines transfected with siRNA than in the CT control groups and the untreated control groups. In a parallel manner, the cell cycle was significantly (P < 0.01) altered in the transfected study groups, with reduced percentages of retinoblastoma cells in the S-phase. The cell-cycle-associated protein P21 was upregulated, and the protein P27 was slightly upregulated in the transfected retinoblastoma cell lines, in comparison to the control groups. CONCLUSIONS:
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Authors | Shu-wei Bai, Bin Li, Hao Zhang, Jost B Jonas, Bo-wen Zhao, Ling Shen, Yi-chen Wang |
Journal | Investigative ophthalmology & visual science
(Invest Ophthalmol Vis Sci)
Vol. 52
Issue 7
Pg. 4560-70
(Jun 28 2011)
ISSN: 1552-5783 [Electronic] United States |
PMID | 21169528
(Publication Type: Comparative Study, Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Eye Proteins
- Homeodomain Proteins
- PAX6 Transcription Factor
- PAX6 protein, human
- Paired Box Transcription Factors
- RNA, Neoplasm
- RNA, Small Interfering
- Repressor Proteins
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Topics |
- Apoptosis
(physiology)
- Blotting, Western
- Cell Proliferation
- Eye Proteins
(biosynthesis, genetics)
- Gene Expression Regulation, Neoplastic
- Gene Silencing
- Homeodomain Proteins
(biosynthesis, genetics)
- Humans
- PAX6 Transcription Factor
- Paired Box Transcription Factors
(biosynthesis, genetics)
- Polymerase Chain Reaction
- RNA, Neoplasm
(genetics)
- RNA, Small Interfering
(genetics)
- Repressor Proteins
(biosynthesis, genetics)
- Retinal Neoplasms
(genetics, metabolism, pathology)
- Retinoblastoma
(genetics, metabolism, pathology)
- Tumor Cells, Cultured
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