Combinatorial antimicrobial efficacy and mechanism of linalool against clinically-relevant Klebsiella pneumoniae
Antibiotic-adjuvant combinatory therapy serves as a viable treatment option in addressing antibiotic resistance in the clinical setting. This study was carried out to assess and characterize the adjuvant potential and mode of action of linalool against carbapenemase-producing Klebsiella pneumoniae (...
| Main Authors: | , , , , , , |
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| Format: | Article |
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Frontiers Media
2021
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| Online Access: | http://psasir.upm.edu.my/id/eprint/96436/ |
| _version_ | 1848862364293660672 |
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| author | Yang, Shun Kai Yusoff, Khatijah Ajat, Mokrish Wee, Chien Yeong Yap, Polly Soo-Xi Lim, Swee Hua Erin Lai, Kok Song |
| author_facet | Yang, Shun Kai Yusoff, Khatijah Ajat, Mokrish Wee, Chien Yeong Yap, Polly Soo-Xi Lim, Swee Hua Erin Lai, Kok Song |
| author_sort | Yang, Shun Kai |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Antibiotic-adjuvant combinatory therapy serves as a viable treatment option in addressing antibiotic resistance in the clinical setting. This study was carried out to assess and characterize the adjuvant potential and mode of action of linalool against carbapenemase-producing Klebsiella pneumoniae (KPC-KP). Linalool exhibited bactericidal activity alone (11,250 μg/ml) and in combination with meropenem (5,625 μg/ml). Comparative proteomic analysis showed significant reduction in the number of cytoplasmic and membrane proteins, indicating membrane damage in linalool-treated KPC-KP cells. Upregulation of oxidative stress regulator proteins and downregulation of oxidative stress-sensitive proteins indicated oxidative stress. Zeta potential measurement and outer membrane permeability assay revealed that linalool increases the bacterial surface charge as well as the membrane permeability. Intracellular leakage of nucleic acid and proteins was detected upon linalool treatment. Scanning and transmission electron microscopies further revealed the breakage of bacterial membrane and loss of intracellular materials. Linalool induced oxidative stress by generating reactive oxygen species (ROS) which initiates lipid peroxidation, leading to damage of the bacterial membrane. This leads to intracellular leakage, eventually killing the KPC-KP cells. Our study demonstrated that linalool possesses great potential in future clinical applications as an adjuvant along with existing antibiotics attributed to their ability in disrupting the bacterial membrane by inducing oxidative stress. This facilitates the uptake of antibiotics into the bacterial cells, enhancing bacterial killing. |
| first_indexed | 2025-11-15T13:15:51Z |
| format | Article |
| id | upm-96436 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T13:15:51Z |
| publishDate | 2021 |
| publisher | Frontiers Media |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-964362023-01-26T02:26:56Z http://psasir.upm.edu.my/id/eprint/96436/ Combinatorial antimicrobial efficacy and mechanism of linalool against clinically-relevant Klebsiella pneumoniae Yang, Shun Kai Yusoff, Khatijah Ajat, Mokrish Wee, Chien Yeong Yap, Polly Soo-Xi Lim, Swee Hua Erin Lai, Kok Song Antibiotic-adjuvant combinatory therapy serves as a viable treatment option in addressing antibiotic resistance in the clinical setting. This study was carried out to assess and characterize the adjuvant potential and mode of action of linalool against carbapenemase-producing Klebsiella pneumoniae (KPC-KP). Linalool exhibited bactericidal activity alone (11,250 μg/ml) and in combination with meropenem (5,625 μg/ml). Comparative proteomic analysis showed significant reduction in the number of cytoplasmic and membrane proteins, indicating membrane damage in linalool-treated KPC-KP cells. Upregulation of oxidative stress regulator proteins and downregulation of oxidative stress-sensitive proteins indicated oxidative stress. Zeta potential measurement and outer membrane permeability assay revealed that linalool increases the bacterial surface charge as well as the membrane permeability. Intracellular leakage of nucleic acid and proteins was detected upon linalool treatment. Scanning and transmission electron microscopies further revealed the breakage of bacterial membrane and loss of intracellular materials. Linalool induced oxidative stress by generating reactive oxygen species (ROS) which initiates lipid peroxidation, leading to damage of the bacterial membrane. This leads to intracellular leakage, eventually killing the KPC-KP cells. Our study demonstrated that linalool possesses great potential in future clinical applications as an adjuvant along with existing antibiotics attributed to their ability in disrupting the bacterial membrane by inducing oxidative stress. This facilitates the uptake of antibiotics into the bacterial cells, enhancing bacterial killing. Frontiers Media 2021 Article PeerReviewed Yang, Shun Kai and Yusoff, Khatijah and Ajat, Mokrish and Wee, Chien Yeong and Yap, Polly Soo-Xi and Lim, Swee Hua Erin and Lai, Kok Song (2021) Combinatorial antimicrobial efficacy and mechanism of linalool against clinically-relevant Klebsiella pneumoniae. Frontiers in Microbiology. pp. 1-20. ISSN 1664-302X https://www.frontiersin.org/articles/10.3389/fmicb.2021.635016/full 10.3389/fmicb.2021.635016 |
| spellingShingle | Yang, Shun Kai Yusoff, Khatijah Ajat, Mokrish Wee, Chien Yeong Yap, Polly Soo-Xi Lim, Swee Hua Erin Lai, Kok Song Combinatorial antimicrobial efficacy and mechanism of linalool against clinically-relevant Klebsiella pneumoniae |
| title | Combinatorial antimicrobial efficacy and mechanism of linalool against clinically-relevant Klebsiella pneumoniae |
| title_full | Combinatorial antimicrobial efficacy and mechanism of linalool against clinically-relevant Klebsiella pneumoniae |
| title_fullStr | Combinatorial antimicrobial efficacy and mechanism of linalool against clinically-relevant Klebsiella pneumoniae |
| title_full_unstemmed | Combinatorial antimicrobial efficacy and mechanism of linalool against clinically-relevant Klebsiella pneumoniae |
| title_short | Combinatorial antimicrobial efficacy and mechanism of linalool against clinically-relevant Klebsiella pneumoniae |
| title_sort | combinatorial antimicrobial efficacy and mechanism of linalool against clinically-relevant klebsiella pneumoniae |
| url | http://psasir.upm.edu.my/id/eprint/96436/ http://psasir.upm.edu.my/id/eprint/96436/ http://psasir.upm.edu.my/id/eprint/96436/ |