FOLLOWUS
Total alkaloids from Sophora alopecuroides L. increase susceptibility of extended-spectrum β-lactamases producing Escherichia coli isolates to cefotaxime and ceftazidime
- Chinese Journal of Integrative Medicine Vol. 19, Issue 12, Pages: 945-952(2013)
- Affiliations：
Key Laboratory of the Ministry of Education for the Conservation and Utilization of Special Biological Resources of Western China, College of Life Science, Ningxia University,Yinchuan,China
- Author bio：
- Funds：Supported by a Sub-project of National Basic Research Program of China (No. 2006CB504401), the National Natural Science Foundation of China (No. 31060348, No. 30860207), Grants of Science and Technology Program of Ningxia to Yujiong Wang (No. Z2006-1-75001, KGZ-12-10-02)
DOI：10.1007/s11655-011-0899-4
CLC：Published：2013，
Published Online：11 April 2012，
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Zhou, Xz., Jia, F., Liu, Xm. et al. Total alkaloids from Sophora alopecuroides L. increase susceptibility of extended-spectrum β-lactamases producing Escherichia coli isolates to cefotaxime and ceftazidime., Chin. J. Integr. Med. 19, 945–952 (2013). https://doi.org/10.1007/s11655-011-0899-4
Xue-zhang Zhou, Fang Jia, Xiao-ming Liu, et al. Total alkaloids from Sophora alopecuroides L. increase susceptibility of extended-spectrum β-lactamases producing Escherichia coli isolates to cefotaxime and ceftazidime. [J]. Chinese Journal of Integrative Medicine 19(12):945-952(2013)
Zhou, Xz., Jia, F., Liu, Xm. et al. Total alkaloids from Sophora alopecuroides L. increase susceptibility of extended-spectrum β-lactamases producing Escherichia coli isolates to cefotaxime and ceftazidime., Chin. J. Integr. Med. 19, 945–952 (2013). https://doi.org/10.1007/s11655-011-0899-4 DOI：
Xue-zhang Zhou, Fang Jia, Xiao-ming Liu, et al. Total alkaloids from Sophora alopecuroides L. increase susceptibility of extended-spectrum β-lactamases producing Escherichia coli isolates to cefotaxime and ceftazidime. [J]. Chinese Journal of Integrative Medicine 19(12):945-952(2013) DOI： 10.1007/s11655-011-0899-4.
摘要
To evaluate the antimicrobial activity of total alkaloids extracted from Sophorea alopecuroides L. (TASA) against clinical isolated extended-spectrum beta-lactamases (ESBLs) producing Escherichia coli (E. coli) strains. The antibacterial activity of TASA either itself or in combination with cefotaxime (CTX) or ceftazidime (CAZ) was investigated by using the microbroth dilution method and phenotypic confirmatory disk diffusion test against three clinical isolated ESBLs-producing E. coli strains; the interactions of TASA and CTX or CAZ were ascertained by evaluating the fractional inhibitory concentration index (FICI). The antibacterial activity of either TASA itself or in combination with CTX or CAZ was found. The minimum inhibitory concentration (MICs) of TASA against the ESBLs producing isolates was 12.5 mg/mL. In the combinations with a sub-inhibitory concentration of TASA
a synergistic effect on CTX and CAZ against the ESBLs producing isolates was observed. Similarly
the isolates exposed to lower dose of TASA yielded an increased susceptibility to CTX and CAZ by 8–16 folds determined by microdilution assay. Moreover
enzymatic detection of ESBLs demonstrated that TASA induced reversal resistance to CTX and CAZ partially by a mechanism of inhibition of ESBLs activity in these isolates. Additionally
in the tested isolates following the exposure of TASA
molecular analysis verified the SHV-type beta-lactamase encoding ESBL gene in these isolates
and no mutation was introduced into the ESBL gene. These results suggest that TASA could be used as a source of natural compound with pharmacological activity of reversal resistance to antimicrobial agent. These findings also indicated that the application of the TASA in combination with antibiotics might prove useful in the control and treatment of infectious diseases caused by the ESBLs producing enterobacteriaceae.
Abstract
To evaluate the antimicrobial activity of total alkaloids extracted from Sophorea alopecuroides L. (TASA) against clinical isolated extended-spectrum beta-lactamases (ESBLs) producing Escherichia coli (E. coli) strains. The antibacterial activity of TASA either itself or in combination with cefotaxime (CTX) or ceftazidime (CAZ) was investigated by using the microbroth dilution method and phenotypic confirmatory disk diffusion test against three clinical isolated ESBLs-producing E. coli strains; the interactions of TASA and CTX or CAZ were ascertained by evaluating the fractional inhibitory concentration index (FICI). The antibacterial activity of either TASA itself or in combination with CTX or CAZ was found. The minimum inhibitory concentration (MICs) of TASA against the ESBLs producing isolates was 12.5 mg/mL. In the combinations with a sub-inhibitory concentration of TASA
a synergistic effect on CTX and CAZ against the ESBLs producing isolates was observed. Similarly
the isolates exposed to lower dose of TASA yielded an increased susceptibility to CTX and CAZ by 8–16 folds determined by microdilution assay. Moreover
enzymatic detection of ESBLs demonstrated that TASA induced reversal resistance to CTX and CAZ partially by a mechanism of inhibition of ESBLs activity in these isolates. Additionally
in the tested isolates following the exposure of TASA
molecular analysis verified the SHV-type beta-lactamase encoding ESBL gene in these isolates
and no mutation was introduced into the ESBL gene. These results suggest that TASA could be used as a source of natural compound with pharmacological activity of reversal resistance to antimicrobial agent. These findings also indicated that the application of the TASA in combination with antibiotics might prove useful in the control and treatment of infectious diseases caused by the ESBLs producing enterobacteriaceae.
关键词
total alkaloidsSophorea alopecuroides L.extended spectrum β-lactamasesantibiotic resistanceEscherichia coli
Keywords
total alkaloidsSophorea alopecuroides L.extended spectrum β-lactamasesantibiotic resistanceEscherichia coli
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