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- MINIREVIEW] Development of bacteria as diagnostics and therapeutics by genetic engineering
- Daejin Lim , Miryoung Song
- J. Microbiol. 2019;57(8):637-643. Published online May 11, 2019
- DOI: https://doi.org/10.1007/s12275-019-9105-8
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- 15 Web of Science
- 13 Crossref
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Abstract
- Bacteria sense and respond to the environment, communicate, and continuously interact with their surroundings, including host bodies. For more than a century, engineers have been trying to harness the natural ability of bacteria as live biotherapeutics for the treatment of diseases. Recent advances in synthetic biology facilitate the enlargement of the repertoire of genetic parts, tools, and devices that serve as a framework for biotherapy. This review describes bacterial species developed for specific diseases shown in in vitro studies and clinical stages. Here, we focus on drug delivery by programing bacteria and discuss the challenges for safety and improvement.
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Citations
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- Extracellular DNAs released form the genetically engineered E. coli CU103 during growth in different liquid media
- Kim, Chi Kyung , Park, Sang Ho , Lim, Jai Yun , Kim, Young Chang , Kim, Young Soo , Min Kyung Hee , Lee, Ki Sung
- J. Microbiol. 1996;34(2):144-150.
- 33 View
- 0 Download
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Abstract
- During growth of the genetically engineered E. coli CU103 in different media, extracellular DNAs released from the cells were studied. The extracellular DNAs released in the medium were concentrated by an ethanol precipitation method and then quantified by a fluorescence method using Hoechst 33258. The released extracellular DNAs were also examined by gel electrophoresis and identified by Southern hybridization for the cloned pcbCD genes. The chromosomal DNAs and recombinant plasmid containing the cloned genes were observed to be released in an exponential growth phase. In Luria-Bertani (LB) broth and MM2-GLUCOSE, 210 and 69 ng/ml of DNAs were detected, respectively, after 3-4 days incubation at 30℃ and at pH 7.0. But the released DNAs were measured to be about 10-15 ng/ml in filtered river water (FW) and Tris-EDTA (TE). The at both 15℃ and 4℃, but the released DNAs were more easily degraded at the higher temperature. The extracellular DNAs were produced about 2 times more at pH 7.0 than at both pH 5.0 and pH 9.0 in MM2-glucose medium at 30℃. Therefore, the extracellular DNAs were found to be released actively from the cells during growth in liquid media.
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