The therapeutic potential of D-Serine in reducing expression of the cytopathic genotoxin colibactin
The therapeutic potential of D-Serine in reducing expression of the cytopathic genotoxin colibactin
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D-丝氨酸在减少细胞病变基因毒素大肠杆菌表达方面的治疗潜力
DOI:
10.1101/2022.03.08.483572
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Hallam J
中科院分区:
文献类型:
--
作者:
Hallam J
Some Escherichia colistrains belonging mainly to the B2 phylogroup harbour thepksisland, a 54 kb genomic island encoding the biosynthesis genes for a genotoxic compound named colibactin. In eukaryotic cells, colibactin can induce DNA damage, cell cycle arrest and chromosomal instability. Moreover, production of colibactin has been implicated in the development of colorectal cancer. In this study, we demonstrate the inhibitory effect of D-Serine on the expression of thepksisland in two colibactin-producing strains, CFT073 and Nissle 1917, and determine the implications for cytopathic effects on host cells. To investigate the specificity of the inhibitory effect of D-Serine, we also tested a comprehensive panel of proteinogenic L-amino acids and corresponding D-enantiomers for their ability to modulateclbBtranscription using RT-qPCR. Several D-amino acids exhibited the ability to inhibit expression ofclbB, with D-Serine exerting the strongest repressing activity (3.81-fold in CFT073; 3.80-fold in Nissle 1917) and thus, we focussed additional experiments on D-Serine. To investigate the cellular effect, we investigated if repression of colibactin by D-Serine could reduce the cytopathic responses normally observed during infection of HeLa cells withpks+strains. Levels of γ-H2AX (a marker of DNA double strand breaks) were reduced 2.75-fold in cells infected with D-Serine treatment. Moreover, exposure ofpks+E. colito D-Serine during infection caused a reduction in cellular senescence that was observable at 72 h post infection. The recent finding of an association betweenpks-carrying commensalE. coliand CRC, highlights the necessity for the development of colibactin targeting therapeutics. Here we show that D-Serine can reduce expression of colibactin, and inhibit downstream cellular cytopathy, illuminating its therapeutic potential to prevent colibactin-associated disease.
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影响因子:
4.8
作者:
D. Metzler;E. Snell
通讯作者:
E. Snell
DOI:
10.1101/2021.05.12.443952
发表时间:
2021
期刊:
--
影响因子:
--
作者:
Connolly J
通讯作者:
Connolly J
影响因子:
9.4
作者:
Johnson, James R.;Johnston, Brian;Oswald, Eric
通讯作者:
Oswald, Eric
影响因子:
6.4
作者:
Marcq, Ingrid;Martin, Patricia;Oswald, Eric
通讯作者:
Oswald, Eric
影响因子:
3.2
作者:
COSLOY, SD;MCFALL, E
通讯作者:
MCFALL, E