Insertion sequence mediating mrgB disruption is the major mechanism of polymyxin resistance in carbapenem-resistant Klebsiella pneumoniae isolates from China

Objectives: Infections caused by carbapenem-resistant Klebsiella pneumoniae (CRKP) pose a huge health challenge worldwide. The aim of this study was to evaluate the incidence of polymyxin resistance in clinical CRKP isolates in China and to characterize the molecular mechanisms underlying these poly...
Ausführliche Beschreibung

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Autor*in:	Xin Chen [verfasserIn] Pei Li [verfasserIn] Zhewei Sun [verfasserIn] Xiaogang Xu [verfasserIn] Jianping Jiang [verfasserIn] Jiachun Su [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2022

Schlagwörter:	Carbapenem-resistant Klebsiella pneumoniae Polymyxin resistance mgrB Insertion sequence pmrB

Übergeordnetes Werk:	In: Journal of Global Antimicrobial Resistance - Elsevier, 2021, 30(2022), Seite 357-362
Übergeordnetes Werk:	volume:30 ; year:2022 ; pages:357-362

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.1016/j.jgar.2022.07.002

Katalog-ID:	DOAJ03347205X

Internformat


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245	1	0	\|a Insertion sequence mediating mrgB disruption is the major mechanism of polymyxin resistance in carbapenem-resistant Klebsiella pneumoniae isolates from China
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520			\|a Objectives: Infections caused by carbapenem-resistant Klebsiella pneumoniae (CRKP) pose a huge health challenge worldwide. The aim of this study was to evaluate the incidence of polymyxin resistance in clinical CRKP isolates in China and to characterize the molecular mechanisms underlying these polymyxin-resistant CRKP (PR-CRKP) isolates. Methods: A total of 493 CRKP clinical isolates from patients were collected from six tertiary-care hospitals in China during 2017–2018. Minimum inhibitory concentrations of polymyxin B and colistin were determined using the broth microdilution method. PR-CRKP isolates were identified and subjected to whole-genome sequencing. Quantitative real-time PCR and structural modelling analysis were also performed. Results: We observed a 2.2% (11/493) polymyxin resistance rate in this multicentre cohort. Polymyxin B MICs ranged from 4 to 64 μg/mL and colistin MICs ranged from 8 to 128 μg/mL in 11 PR-CRKP isolates. Key genetic variations identified in PR-CRKP isolates involved eight disruptions (seven insertional inactivation by an insertion sequence [IS] element, one frameshift deletion) in mgrB, and three missense mutations in pmrA, pmrB, and phoP. ISKpn26 was the predominant IS (4/7), and three of these occurred in nucleotide position 74 in the mgrB gene. In addition, we reported a novel mutation S62R in pmrB that may confer polymyxin resistance in K. pneumoniae. Conclusions: Our findings highlight the multifaceted molecular mechanisms of polymyxin resistance in CRKP.
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912			\|a GBV_ILN_40
912			\|a GBV_ILN_60
912			\|a GBV_ILN_62
912			\|a GBV_ILN_63
912			\|a GBV_ILN_65
912			\|a GBV_ILN_69
912			\|a GBV_ILN_70
912			\|a GBV_ILN_73
912			\|a GBV_ILN_74
912			\|a GBV_ILN_95
912			\|a GBV_ILN_105
912			\|a GBV_ILN_110
912			\|a GBV_ILN_151
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912			\|a GBV_ILN_285
912			\|a GBV_ILN_293
912			\|a GBV_ILN_602
912			\|a GBV_ILN_2001
912			\|a GBV_ILN_2003
912			\|a GBV_ILN_2004
912			\|a GBV_ILN_2005
912			\|a GBV_ILN_2007
912			\|a GBV_ILN_2008
912			\|a GBV_ILN_2009
912			\|a GBV_ILN_2010
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912			\|a GBV_ILN_2050
912			\|a GBV_ILN_2055
912			\|a GBV_ILN_2056
912			\|a GBV_ILN_2059
912			\|a GBV_ILN_2061
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912			\|a GBV_ILN_2065
912			\|a GBV_ILN_2068
912			\|a GBV_ILN_2088
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912			\|a GBV_ILN_2129
912			\|a GBV_ILN_2143
912			\|a GBV_ILN_2147
912			\|a GBV_ILN_2148
912			\|a GBV_ILN_2152
912			\|a GBV_ILN_2153
912			\|a GBV_ILN_2190
912			\|a GBV_ILN_2232
912			\|a GBV_ILN_2336
912			\|a GBV_ILN_2470
912			\|a GBV_ILN_2507
912			\|a GBV_ILN_2548
912			\|a GBV_ILN_4012
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912			\|a GBV_ILN_4112
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912			\|a GBV_ILN_4334
912			\|a GBV_ILN_4338
912			\|a GBV_ILN_4367
912			\|a GBV_ILN_4393
912			\|a GBV_ILN_4700
951			\|a AR
952			\|d 30 \|j 2022 \|h 357-362

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author_variant	x c xc p l pl z s zs x x xx j j jj j s js
matchkey_str	article:22137173:2022----::netosqecmdaigrbirpinshmjrehnsoplmxneitnenabpnmeitnk
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publishDate	2022
allfields	10.1016/j.jgar.2022.07.002 doi (DE-627)DOAJ03347205X (DE-599)DOAJ726488e56b074beca8ff589a3432b9ad DE-627 ger DE-627 rakwb eng QR1-502 Xin Chen verfasserin aut Insertion sequence mediating mrgB disruption is the major mechanism of polymyxin resistance in carbapenem-resistant Klebsiella pneumoniae isolates from China 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Objectives: Infections caused by carbapenem-resistant Klebsiella pneumoniae (CRKP) pose a huge health challenge worldwide. The aim of this study was to evaluate the incidence of polymyxin resistance in clinical CRKP isolates in China and to characterize the molecular mechanisms underlying these polymyxin-resistant CRKP (PR-CRKP) isolates. Methods: A total of 493 CRKP clinical isolates from patients were collected from six tertiary-care hospitals in China during 2017–2018. Minimum inhibitory concentrations of polymyxin B and colistin were determined using the broth microdilution method. PR-CRKP isolates were identified and subjected to whole-genome sequencing. Quantitative real-time PCR and structural modelling analysis were also performed. Results: We observed a 2.2% (11/493) polymyxin resistance rate in this multicentre cohort. Polymyxin B MICs ranged from 4 to 64 μg/mL and colistin MICs ranged from 8 to 128 μg/mL in 11 PR-CRKP isolates. Key genetic variations identified in PR-CRKP isolates involved eight disruptions (seven insertional inactivation by an insertion sequence [IS] element, one frameshift deletion) in mgrB, and three missense mutations in pmrA, pmrB, and phoP. ISKpn26 was the predominant IS (4/7), and three of these occurred in nucleotide position 74 in the mgrB gene. In addition, we reported a novel mutation S62R in pmrB that may confer polymyxin resistance in K. pneumoniae. Conclusions: Our findings highlight the multifaceted molecular mechanisms of polymyxin resistance in CRKP. Carbapenem-resistant Klebsiella pneumoniae Polymyxin resistance mgrB Insertion sequence pmrB Microbiology Pei Li verfasserin aut Zhewei Sun verfasserin aut Xiaogang Xu verfasserin aut Jianping Jiang verfasserin aut Jiachun Su verfasserin aut In Journal of Global Antimicrobial Resistance Elsevier, 2021 30(2022), Seite 357-362 (DE-627)741167042 (DE-600)2710046-7 22137173 nnns volume:30 year:2022 pages:357-362 https://doi.org/10.1016/j.jgar.2022.07.002 kostenfrei https://doaj.org/article/726488e56b074beca8ff589a3432b9ad kostenfrei http://www.sciencedirect.com/science/article/pii/S2213716522001692 kostenfrei https://doaj.org/toc/2213-7165 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_165 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4393 GBV_ILN_4700 AR 30 2022 357-362
spelling	10.1016/j.jgar.2022.07.002 doi (DE-627)DOAJ03347205X (DE-599)DOAJ726488e56b074beca8ff589a3432b9ad DE-627 ger DE-627 rakwb eng QR1-502 Xin Chen verfasserin aut Insertion sequence mediating mrgB disruption is the major mechanism of polymyxin resistance in carbapenem-resistant Klebsiella pneumoniae isolates from China 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Objectives: Infections caused by carbapenem-resistant Klebsiella pneumoniae (CRKP) pose a huge health challenge worldwide. The aim of this study was to evaluate the incidence of polymyxin resistance in clinical CRKP isolates in China and to characterize the molecular mechanisms underlying these polymyxin-resistant CRKP (PR-CRKP) isolates. Methods: A total of 493 CRKP clinical isolates from patients were collected from six tertiary-care hospitals in China during 2017–2018. Minimum inhibitory concentrations of polymyxin B and colistin were determined using the broth microdilution method. PR-CRKP isolates were identified and subjected to whole-genome sequencing. Quantitative real-time PCR and structural modelling analysis were also performed. Results: We observed a 2.2% (11/493) polymyxin resistance rate in this multicentre cohort. Polymyxin B MICs ranged from 4 to 64 μg/mL and colistin MICs ranged from 8 to 128 μg/mL in 11 PR-CRKP isolates. Key genetic variations identified in PR-CRKP isolates involved eight disruptions (seven insertional inactivation by an insertion sequence [IS] element, one frameshift deletion) in mgrB, and three missense mutations in pmrA, pmrB, and phoP. ISKpn26 was the predominant IS (4/7), and three of these occurred in nucleotide position 74 in the mgrB gene. In addition, we reported a novel mutation S62R in pmrB that may confer polymyxin resistance in K. pneumoniae. Conclusions: Our findings highlight the multifaceted molecular mechanisms of polymyxin resistance in CRKP. Carbapenem-resistant Klebsiella pneumoniae Polymyxin resistance mgrB Insertion sequence pmrB Microbiology Pei Li verfasserin aut Zhewei Sun verfasserin aut Xiaogang Xu verfasserin aut Jianping Jiang verfasserin aut Jiachun Su verfasserin aut In Journal of Global Antimicrobial Resistance Elsevier, 2021 30(2022), Seite 357-362 (DE-627)741167042 (DE-600)2710046-7 22137173 nnns volume:30 year:2022 pages:357-362 https://doi.org/10.1016/j.jgar.2022.07.002 kostenfrei https://doaj.org/article/726488e56b074beca8ff589a3432b9ad kostenfrei http://www.sciencedirect.com/science/article/pii/S2213716522001692 kostenfrei https://doaj.org/toc/2213-7165 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_165 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4393 GBV_ILN_4700 AR 30 2022 357-362
allfields_unstemmed	10.1016/j.jgar.2022.07.002 doi (DE-627)DOAJ03347205X (DE-599)DOAJ726488e56b074beca8ff589a3432b9ad DE-627 ger DE-627 rakwb eng QR1-502 Xin Chen verfasserin aut Insertion sequence mediating mrgB disruption is the major mechanism of polymyxin resistance in carbapenem-resistant Klebsiella pneumoniae isolates from China 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Objectives: Infections caused by carbapenem-resistant Klebsiella pneumoniae (CRKP) pose a huge health challenge worldwide. The aim of this study was to evaluate the incidence of polymyxin resistance in clinical CRKP isolates in China and to characterize the molecular mechanisms underlying these polymyxin-resistant CRKP (PR-CRKP) isolates. Methods: A total of 493 CRKP clinical isolates from patients were collected from six tertiary-care hospitals in China during 2017–2018. Minimum inhibitory concentrations of polymyxin B and colistin were determined using the broth microdilution method. PR-CRKP isolates were identified and subjected to whole-genome sequencing. Quantitative real-time PCR and structural modelling analysis were also performed. Results: We observed a 2.2% (11/493) polymyxin resistance rate in this multicentre cohort. Polymyxin B MICs ranged from 4 to 64 μg/mL and colistin MICs ranged from 8 to 128 μg/mL in 11 PR-CRKP isolates. Key genetic variations identified in PR-CRKP isolates involved eight disruptions (seven insertional inactivation by an insertion sequence [IS] element, one frameshift deletion) in mgrB, and three missense mutations in pmrA, pmrB, and phoP. ISKpn26 was the predominant IS (4/7), and three of these occurred in nucleotide position 74 in the mgrB gene. In addition, we reported a novel mutation S62R in pmrB that may confer polymyxin resistance in K. pneumoniae. Conclusions: Our findings highlight the multifaceted molecular mechanisms of polymyxin resistance in CRKP. Carbapenem-resistant Klebsiella pneumoniae Polymyxin resistance mgrB Insertion sequence pmrB Microbiology Pei Li verfasserin aut Zhewei Sun verfasserin aut Xiaogang Xu verfasserin aut Jianping Jiang verfasserin aut Jiachun Su verfasserin aut In Journal of Global Antimicrobial Resistance Elsevier, 2021 30(2022), Seite 357-362 (DE-627)741167042 (DE-600)2710046-7 22137173 nnns volume:30 year:2022 pages:357-362 https://doi.org/10.1016/j.jgar.2022.07.002 kostenfrei https://doaj.org/article/726488e56b074beca8ff589a3432b9ad kostenfrei http://www.sciencedirect.com/science/article/pii/S2213716522001692 kostenfrei https://doaj.org/toc/2213-7165 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_165 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4393 GBV_ILN_4700 AR 30 2022 357-362
allfieldsGer	10.1016/j.jgar.2022.07.002 doi (DE-627)DOAJ03347205X (DE-599)DOAJ726488e56b074beca8ff589a3432b9ad DE-627 ger DE-627 rakwb eng QR1-502 Xin Chen verfasserin aut Insertion sequence mediating mrgB disruption is the major mechanism of polymyxin resistance in carbapenem-resistant Klebsiella pneumoniae isolates from China 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Objectives: Infections caused by carbapenem-resistant Klebsiella pneumoniae (CRKP) pose a huge health challenge worldwide. The aim of this study was to evaluate the incidence of polymyxin resistance in clinical CRKP isolates in China and to characterize the molecular mechanisms underlying these polymyxin-resistant CRKP (PR-CRKP) isolates. Methods: A total of 493 CRKP clinical isolates from patients were collected from six tertiary-care hospitals in China during 2017–2018. Minimum inhibitory concentrations of polymyxin B and colistin were determined using the broth microdilution method. PR-CRKP isolates were identified and subjected to whole-genome sequencing. Quantitative real-time PCR and structural modelling analysis were also performed. Results: We observed a 2.2% (11/493) polymyxin resistance rate in this multicentre cohort. Polymyxin B MICs ranged from 4 to 64 μg/mL and colistin MICs ranged from 8 to 128 μg/mL in 11 PR-CRKP isolates. Key genetic variations identified in PR-CRKP isolates involved eight disruptions (seven insertional inactivation by an insertion sequence [IS] element, one frameshift deletion) in mgrB, and three missense mutations in pmrA, pmrB, and phoP. ISKpn26 was the predominant IS (4/7), and three of these occurred in nucleotide position 74 in the mgrB gene. In addition, we reported a novel mutation S62R in pmrB that may confer polymyxin resistance in K. pneumoniae. Conclusions: Our findings highlight the multifaceted molecular mechanisms of polymyxin resistance in CRKP. Carbapenem-resistant Klebsiella pneumoniae Polymyxin resistance mgrB Insertion sequence pmrB Microbiology Pei Li verfasserin aut Zhewei Sun verfasserin aut Xiaogang Xu verfasserin aut Jianping Jiang verfasserin aut Jiachun Su verfasserin aut In Journal of Global Antimicrobial Resistance Elsevier, 2021 30(2022), Seite 357-362 (DE-627)741167042 (DE-600)2710046-7 22137173 nnns volume:30 year:2022 pages:357-362 https://doi.org/10.1016/j.jgar.2022.07.002 kostenfrei https://doaj.org/article/726488e56b074beca8ff589a3432b9ad kostenfrei http://www.sciencedirect.com/science/article/pii/S2213716522001692 kostenfrei https://doaj.org/toc/2213-7165 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_165 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4393 GBV_ILN_4700 AR 30 2022 357-362
allfieldsSound	10.1016/j.jgar.2022.07.002 doi (DE-627)DOAJ03347205X (DE-599)DOAJ726488e56b074beca8ff589a3432b9ad DE-627 ger DE-627 rakwb eng QR1-502 Xin Chen verfasserin aut Insertion sequence mediating mrgB disruption is the major mechanism of polymyxin resistance in carbapenem-resistant Klebsiella pneumoniae isolates from China 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Objectives: Infections caused by carbapenem-resistant Klebsiella pneumoniae (CRKP) pose a huge health challenge worldwide. The aim of this study was to evaluate the incidence of polymyxin resistance in clinical CRKP isolates in China and to characterize the molecular mechanisms underlying these polymyxin-resistant CRKP (PR-CRKP) isolates. Methods: A total of 493 CRKP clinical isolates from patients were collected from six tertiary-care hospitals in China during 2017–2018. Minimum inhibitory concentrations of polymyxin B and colistin were determined using the broth microdilution method. PR-CRKP isolates were identified and subjected to whole-genome sequencing. Quantitative real-time PCR and structural modelling analysis were also performed. Results: We observed a 2.2% (11/493) polymyxin resistance rate in this multicentre cohort. Polymyxin B MICs ranged from 4 to 64 μg/mL and colistin MICs ranged from 8 to 128 μg/mL in 11 PR-CRKP isolates. Key genetic variations identified in PR-CRKP isolates involved eight disruptions (seven insertional inactivation by an insertion sequence [IS] element, one frameshift deletion) in mgrB, and three missense mutations in pmrA, pmrB, and phoP. ISKpn26 was the predominant IS (4/7), and three of these occurred in nucleotide position 74 in the mgrB gene. In addition, we reported a novel mutation S62R in pmrB that may confer polymyxin resistance in K. pneumoniae. Conclusions: Our findings highlight the multifaceted molecular mechanisms of polymyxin resistance in CRKP. Carbapenem-resistant Klebsiella pneumoniae Polymyxin resistance mgrB Insertion sequence pmrB Microbiology Pei Li verfasserin aut Zhewei Sun verfasserin aut Xiaogang Xu verfasserin aut Jianping Jiang verfasserin aut Jiachun Su verfasserin aut In Journal of Global Antimicrobial Resistance Elsevier, 2021 30(2022), Seite 357-362 (DE-627)741167042 (DE-600)2710046-7 22137173 nnns volume:30 year:2022 pages:357-362 https://doi.org/10.1016/j.jgar.2022.07.002 kostenfrei https://doaj.org/article/726488e56b074beca8ff589a3432b9ad kostenfrei http://www.sciencedirect.com/science/article/pii/S2213716522001692 kostenfrei https://doaj.org/toc/2213-7165 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_165 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4393 GBV_ILN_4700 AR 30 2022 357-362
language	English
source	In Journal of Global Antimicrobial Resistance 30(2022), Seite 357-362 volume:30 year:2022 pages:357-362
sourceStr	In Journal of Global Antimicrobial Resistance 30(2022), Seite 357-362 volume:30 year:2022 pages:357-362
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	Carbapenem-resistant Klebsiella pneumoniae Polymyxin resistance mgrB Insertion sequence pmrB Microbiology
isfreeaccess_bool	true
container_title	Journal of Global Antimicrobial Resistance
authorswithroles_txt_mv	Xin Chen @@aut@@ Pei Li @@aut@@ Zhewei Sun @@aut@@ Xiaogang Xu @@aut@@ Jianping Jiang @@aut@@ Jiachun Su @@aut@@
publishDateDaySort_date	2022-01-01T00:00:00Z
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language_de	englisch
fullrecord	<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">DOAJ03347205X</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230307180450.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">230226s2022 xx \|\|\|\|\|o 00\| \|\|eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1016/j.jgar.2022.07.002</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)DOAJ03347205X</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-599)DOAJ726488e56b074beca8ff589a3432b9ad</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="050" ind1=" " ind2="0"><subfield code="a">QR1-502</subfield></datafield><datafield tag="100" ind1="0" ind2=" "><subfield code="a">Xin Chen</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Insertion sequence mediating mrgB disruption is the major mechanism of polymyxin resistance in carbapenem-resistant Klebsiella pneumoniae isolates from China</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2022</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Objectives: Infections caused by carbapenem-resistant Klebsiella pneumoniae (CRKP) pose a huge health challenge worldwide. The aim of this study was to evaluate the incidence of polymyxin resistance in clinical CRKP isolates in China and to characterize the molecular mechanisms underlying these polymyxin-resistant CRKP (PR-CRKP) isolates. Methods: A total of 493 CRKP clinical isolates from patients were collected from six tertiary-care hospitals in China during 2017–2018. Minimum inhibitory concentrations of polymyxin B and colistin were determined using the broth microdilution method. PR-CRKP isolates were identified and subjected to whole-genome sequencing. Quantitative real-time PCR and structural modelling analysis were also performed. Results: We observed a 2.2% (11/493) polymyxin resistance rate in this multicentre cohort. Polymyxin B MICs ranged from 4 to 64 μg/mL and colistin MICs ranged from 8 to 128 μg/mL in 11 PR-CRKP isolates. Key genetic variations identified in PR-CRKP isolates involved eight disruptions (seven insertional inactivation by an insertion sequence [IS] element, one frameshift deletion) in mgrB, and three missense mutations in pmrA, pmrB, and phoP. ISKpn26 was the predominant IS (4/7), and three of these occurred in nucleotide position 74 in the mgrB gene. In addition, we reported a novel mutation S62R in pmrB that may confer polymyxin resistance in K. pneumoniae. 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callnumber-first	Q - Science
author	Xin Chen
spellingShingle	Xin Chen misc QR1-502 misc Carbapenem-resistant Klebsiella pneumoniae misc Polymyxin resistance misc mgrB misc Insertion sequence misc pmrB misc Microbiology Insertion sequence mediating mrgB disruption is the major mechanism of polymyxin resistance in carbapenem-resistant Klebsiella pneumoniae isolates from China
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topic_title	QR1-502 Insertion sequence mediating mrgB disruption is the major mechanism of polymyxin resistance in carbapenem-resistant Klebsiella pneumoniae isolates from China Carbapenem-resistant Klebsiella pneumoniae Polymyxin resistance mgrB Insertion sequence pmrB
topic	misc QR1-502 misc Carbapenem-resistant Klebsiella pneumoniae misc Polymyxin resistance misc mgrB misc Insertion sequence misc pmrB misc Microbiology
topic_unstemmed	misc QR1-502 misc Carbapenem-resistant Klebsiella pneumoniae misc Polymyxin resistance misc mgrB misc Insertion sequence misc pmrB misc Microbiology
topic_browse	misc QR1-502 misc Carbapenem-resistant Klebsiella pneumoniae misc Polymyxin resistance misc mgrB misc Insertion sequence misc pmrB misc Microbiology
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title	Insertion sequence mediating mrgB disruption is the major mechanism of polymyxin resistance in carbapenem-resistant Klebsiella pneumoniae isolates from China
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title_full	Insertion sequence mediating mrgB disruption is the major mechanism of polymyxin resistance in carbapenem-resistant Klebsiella pneumoniae isolates from China
author_sort	Xin Chen
journal	Journal of Global Antimicrobial Resistance
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author_browse	Xin Chen Pei Li Zhewei Sun Xiaogang Xu Jianping Jiang Jiachun Su
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title_sort	insertion sequence mediating mrgb disruption is the major mechanism of polymyxin resistance in carbapenem-resistant klebsiella pneumoniae isolates from china
callnumber	QR1-502
title_auth	Insertion sequence mediating mrgB disruption is the major mechanism of polymyxin resistance in carbapenem-resistant Klebsiella pneumoniae isolates from China
abstract	Objectives: Infections caused by carbapenem-resistant Klebsiella pneumoniae (CRKP) pose a huge health challenge worldwide. The aim of this study was to evaluate the incidence of polymyxin resistance in clinical CRKP isolates in China and to characterize the molecular mechanisms underlying these polymyxin-resistant CRKP (PR-CRKP) isolates. Methods: A total of 493 CRKP clinical isolates from patients were collected from six tertiary-care hospitals in China during 2017–2018. Minimum inhibitory concentrations of polymyxin B and colistin were determined using the broth microdilution method. PR-CRKP isolates were identified and subjected to whole-genome sequencing. Quantitative real-time PCR and structural modelling analysis were also performed. Results: We observed a 2.2% (11/493) polymyxin resistance rate in this multicentre cohort. Polymyxin B MICs ranged from 4 to 64 μg/mL and colistin MICs ranged from 8 to 128 μg/mL in 11 PR-CRKP isolates. Key genetic variations identified in PR-CRKP isolates involved eight disruptions (seven insertional inactivation by an insertion sequence [IS] element, one frameshift deletion) in mgrB, and three missense mutations in pmrA, pmrB, and phoP. ISKpn26 was the predominant IS (4/7), and three of these occurred in nucleotide position 74 in the mgrB gene. In addition, we reported a novel mutation S62R in pmrB that may confer polymyxin resistance in K. pneumoniae. Conclusions: Our findings highlight the multifaceted molecular mechanisms of polymyxin resistance in CRKP.
abstractGer	Objectives: Infections caused by carbapenem-resistant Klebsiella pneumoniae (CRKP) pose a huge health challenge worldwide. The aim of this study was to evaluate the incidence of polymyxin resistance in clinical CRKP isolates in China and to characterize the molecular mechanisms underlying these polymyxin-resistant CRKP (PR-CRKP) isolates. Methods: A total of 493 CRKP clinical isolates from patients were collected from six tertiary-care hospitals in China during 2017–2018. Minimum inhibitory concentrations of polymyxin B and colistin were determined using the broth microdilution method. PR-CRKP isolates were identified and subjected to whole-genome sequencing. Quantitative real-time PCR and structural modelling analysis were also performed. Results: We observed a 2.2% (11/493) polymyxin resistance rate in this multicentre cohort. Polymyxin B MICs ranged from 4 to 64 μg/mL and colistin MICs ranged from 8 to 128 μg/mL in 11 PR-CRKP isolates. Key genetic variations identified in PR-CRKP isolates involved eight disruptions (seven insertional inactivation by an insertion sequence [IS] element, one frameshift deletion) in mgrB, and three missense mutations in pmrA, pmrB, and phoP. ISKpn26 was the predominant IS (4/7), and three of these occurred in nucleotide position 74 in the mgrB gene. In addition, we reported a novel mutation S62R in pmrB that may confer polymyxin resistance in K. pneumoniae. Conclusions: Our findings highlight the multifaceted molecular mechanisms of polymyxin resistance in CRKP.
abstract_unstemmed	Objectives: Infections caused by carbapenem-resistant Klebsiella pneumoniae (CRKP) pose a huge health challenge worldwide. The aim of this study was to evaluate the incidence of polymyxin resistance in clinical CRKP isolates in China and to characterize the molecular mechanisms underlying these polymyxin-resistant CRKP (PR-CRKP) isolates. Methods: A total of 493 CRKP clinical isolates from patients were collected from six tertiary-care hospitals in China during 2017–2018. Minimum inhibitory concentrations of polymyxin B and colistin were determined using the broth microdilution method. PR-CRKP isolates were identified and subjected to whole-genome sequencing. Quantitative real-time PCR and structural modelling analysis were also performed. Results: We observed a 2.2% (11/493) polymyxin resistance rate in this multicentre cohort. Polymyxin B MICs ranged from 4 to 64 μg/mL and colistin MICs ranged from 8 to 128 μg/mL in 11 PR-CRKP isolates. Key genetic variations identified in PR-CRKP isolates involved eight disruptions (seven insertional inactivation by an insertion sequence [IS] element, one frameshift deletion) in mgrB, and three missense mutations in pmrA, pmrB, and phoP. ISKpn26 was the predominant IS (4/7), and three of these occurred in nucleotide position 74 in the mgrB gene. In addition, we reported a novel mutation S62R in pmrB that may confer polymyxin resistance in K. pneumoniae. Conclusions: Our findings highlight the multifaceted molecular mechanisms of polymyxin resistance in CRKP.
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title_short	Insertion sequence mediating mrgB disruption is the major mechanism of polymyxin resistance in carbapenem-resistant Klebsiella pneumoniae isolates from China
url	https://doi.org/10.1016/j.jgar.2022.07.002 https://doaj.org/article/726488e56b074beca8ff589a3432b9ad http://www.sciencedirect.com/science/article/pii/S2213716522001692 https://doaj.org/toc/2213-7165
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up_date	2024-07-03T17:56:16.414Z
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The aim of this study was to evaluate the incidence of polymyxin resistance in clinical CRKP isolates in China and to characterize the molecular mechanisms underlying these polymyxin-resistant CRKP (PR-CRKP) isolates. Methods: A total of 493 CRKP clinical isolates from patients were collected from six tertiary-care hospitals in China during 2017–2018. Minimum inhibitory concentrations of polymyxin B and colistin were determined using the broth microdilution method. PR-CRKP isolates were identified and subjected to whole-genome sequencing. Quantitative real-time PCR and structural modelling analysis were also performed. Results: We observed a 2.2% (11/493) polymyxin resistance rate in this multicentre cohort. Polymyxin B MICs ranged from 4 to 64 μg/mL and colistin MICs ranged from 8 to 128 μg/mL in 11 PR-CRKP isolates. Key genetic variations identified in PR-CRKP isolates involved eight disruptions (seven insertional inactivation by an insertion sequence [IS] element, one frameshift deletion) in mgrB, and three missense mutations in pmrA, pmrB, and phoP. ISKpn26 was the predominant IS (4/7), and three of these occurred in nucleotide position 74 in the mgrB gene. In addition, we reported a novel mutation S62R in pmrB that may confer polymyxin resistance in K. pneumoniae. 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Insertion sequence mediating mrgB disruption is the major mechanism of polymyxin resistance in carbapenem-resistant Klebsiella pneumoniae isolates from China

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