Salmonella typhimurium strain SL7207 induces apoptosis and inhibits the growth of HepG2 hepatoma cells in vitro and in vivo
Salmonella typhimurium is probably most extensively studied tumor-targeting bacteria and SL7207 is one of its attenuated strains. SL7207 was first made for bacterial vaccine development and its therapeutic efficacy and safety for hepatocellular carcinoma has not been characterized. In this study, th...
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| Format: | Article |
| Language: | English |
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Elsevier
2012-12-01
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| Series: | Acta Pharmaceutica Sinica B |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211383512001451 |
| _version_ | 1811277111637311488 |
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| author | Baowei Li Hongwei He Shenghua Zhang Wuli Zhao Naren Li Rongguang Shao |
| author_facet | Baowei Li Hongwei He Shenghua Zhang Wuli Zhao Naren Li Rongguang Shao |
| author_sort | Baowei Li |
| collection | DOAJ |
| description | Salmonella typhimurium is probably most extensively studied tumor-targeting bacteria and SL7207 is one of its attenuated strains. SL7207 was first made for bacterial vaccine development and its therapeutic efficacy and safety for hepatocellular carcinoma has not been characterized. In this study, the inhibitory ability of SL7207-lux on human hepatoma HepG2 cells was tested in vitro and in vivo. A bacterial luminescent gene cluster (lux CDABE) was transfected into SL7207 to better monitor the invasion of the bacteria. The results show that SL7207-lux can rapidly enter HepG2 cells and localize in the cytoplasm. This invasion represses cell proliferation and induces apoptosis. In vivo real-time invasion studies showed that the bacteria gradually accumulate in the tumor. This enrichment was confirmed by anatomic observation at 5 days after inoculation. About 40% of tumor growth was inhibited by SL7207-lux at 34 days post-treatment without significant loss of body weight. The area of necrosis of tumor tissue was clearly increased in the treated group. Bacterial quantification showed that the number of colony-forming units per gram of bacteria within tumor tissue was approximately 1000-fold higher than that of liver and spleen. These data suggest that attenuated S. typhimurium strain SL7207 has potential for the treatment of cancers. |
| first_indexed | 2024-04-13T00:09:49Z |
| format | Article |
| id | doaj.art-096bdcd6301049dbbafa59732eabb93c |
| institution | Directory Open Access Journal |
| issn | 2211-3835 2211-3843 |
| language | English |
| last_indexed | 2024-04-13T00:09:49Z |
| publishDate | 2012-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Acta Pharmaceutica Sinica B |
| spelling | doaj.art-096bdcd6301049dbbafa59732eabb93c2022-12-22T03:11:07ZengElsevierActa Pharmaceutica Sinica B2211-38352211-38432012-12-012656256810.1016/j.apsb.2012.10.006Salmonella typhimurium strain SL7207 induces apoptosis and inhibits the growth of HepG2 hepatoma cells in vitro and in vivoBaowei LiHongwei HeShenghua ZhangWuli ZhaoNaren LiRongguang ShaoSalmonella typhimurium is probably most extensively studied tumor-targeting bacteria and SL7207 is one of its attenuated strains. SL7207 was first made for bacterial vaccine development and its therapeutic efficacy and safety for hepatocellular carcinoma has not been characterized. In this study, the inhibitory ability of SL7207-lux on human hepatoma HepG2 cells was tested in vitro and in vivo. A bacterial luminescent gene cluster (lux CDABE) was transfected into SL7207 to better monitor the invasion of the bacteria. The results show that SL7207-lux can rapidly enter HepG2 cells and localize in the cytoplasm. This invasion represses cell proliferation and induces apoptosis. In vivo real-time invasion studies showed that the bacteria gradually accumulate in the tumor. This enrichment was confirmed by anatomic observation at 5 days after inoculation. About 40% of tumor growth was inhibited by SL7207-lux at 34 days post-treatment without significant loss of body weight. The area of necrosis of tumor tissue was clearly increased in the treated group. Bacterial quantification showed that the number of colony-forming units per gram of bacteria within tumor tissue was approximately 1000-fold higher than that of liver and spleen. These data suggest that attenuated S. typhimurium strain SL7207 has potential for the treatment of cancers.http://www.sciencedirect.com/science/article/pii/S2211383512001451Salmonella typhimuriumHepatocellular carcinomaApoptosisCancer therapy |
| spellingShingle | Baowei Li Hongwei He Shenghua Zhang Wuli Zhao Naren Li Rongguang Shao Salmonella typhimurium strain SL7207 induces apoptosis and inhibits the growth of HepG2 hepatoma cells in vitro and in vivo Acta Pharmaceutica Sinica B Salmonella typhimurium Hepatocellular carcinoma Apoptosis Cancer therapy |
| title | Salmonella typhimurium strain SL7207 induces apoptosis and inhibits the growth of HepG2 hepatoma cells in vitro and in vivo |
| title_full | Salmonella typhimurium strain SL7207 induces apoptosis and inhibits the growth of HepG2 hepatoma cells in vitro and in vivo |
| title_fullStr | Salmonella typhimurium strain SL7207 induces apoptosis and inhibits the growth of HepG2 hepatoma cells in vitro and in vivo |
| title_full_unstemmed | Salmonella typhimurium strain SL7207 induces apoptosis and inhibits the growth of HepG2 hepatoma cells in vitro and in vivo |
| title_short | Salmonella typhimurium strain SL7207 induces apoptosis and inhibits the growth of HepG2 hepatoma cells in vitro and in vivo |
| title_sort | salmonella typhimurium strain sl7207 induces apoptosis and inhibits the growth of hepg2 hepatoma cells in vitro and in vivo |
| topic | Salmonella typhimurium Hepatocellular carcinoma Apoptosis Cancer therapy |
| url | http://www.sciencedirect.com/science/article/pii/S2211383512001451 |
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