| Title |
Protease-Sensitive Inhibitory Activity of Cell-free Supernatant of Lactobacillus crispatus 156 Synergizes with Ciprofloxacin, Moxifloxacin and Streptomycin Against Pseudomonas aeruginosa: An In Vitro Study
|
|---|---|
| Published in |
Probiotics and Antimicrobial Proteins, February 2015
|
| DOI | 10.1007/s12602-015-9188-4 |
| Pubmed ID | |
| Authors |
Sukhraj Kaur, Preeti Sharma |
| Abstract |
Ciprofloxacin and streptomycin are frequently prescribed for the treatment of medical conditions originating due to infection by Pseudomonas aeruginosa. However, fluoroquinolone administration has been linked to the outgrowth of Clostridium difficile pathogen, especially in immunocompromised patients. Secondly, frequent administration of antibiotics may lead to development of resistance in the pathogens. Thus, there is a need to explore innovative adjunct therapies to lower the therapeutic doses of the antibiotics. Herein, we evaluated the synergism, if any, between conventional antibiotics and the cell-free supernatant (CFS) of vaginal Lactobacillus crispatus 156 against P. aeruginosa MTCC 741. L. crispatus 156 was isolated from the human vaginal tract, and its CFS had broad-spectrum antimicrobial activity against various Gram-positive and Gram-negative pathogens, including P. aeruginosa. The inhibitory substance present in the CFS completely lost its activity after treatment with proteinases and was resistant to temperatures up to 80 °C and pH ranging from 2 to 6. The cumulative production of the inhibitory substance in CFS was studied, and it showed that the secretion of the inhibitory substance was initiated in middle log phase of growth and peaked in late log phase. Further, CFS synergized the activities of ciprofloxacin, moxifloxacin, and streptomycin as evaluated in terms of checkerboard titrations. It lowered the minimum inhibitory concentration (MIC) of ciprofloxacin by almost 30 times and MIC of both moxifloxacin and streptomycin by 8 times. Interestingly, pepsin treatment of CFS caused the complete abrogation of its synergistic effect with all the three antibiotics. Thus, from the study, it can be concluded that probiotic-based alternative therapeutic regimen can be designed for the treatment of P. aeruginosa infections. |
X Demographics
The data shown below were collected from the profiles of 3 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United Kingdom | 2 | 67% |
| Unknown | 1 | 33% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 3 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 28 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 28 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Master | 5 | 18% |
| Student > Ph. D. Student | 4 | 14% |
| Researcher | 3 | 11% |
| Other | 3 | 11% |
| Student > Bachelor | 2 | 7% |
| Other | 3 | 11% |
| Unknown | 8 | 29% |
| Readers by discipline | Count | As % |
|---|---|---|
| Medicine and Dentistry | 5 | 18% |
| Immunology and Microbiology | 4 | 14% |
| Agricultural and Biological Sciences | 4 | 14% |
| Biochemistry, Genetics and Molecular Biology | 3 | 11% |
| Veterinary Science and Veterinary Medicine | 1 | 4% |
| Other | 2 | 7% |
| Unknown | 9 | 32% |
Attention Score in Context
This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 10 August 2016.
All research outputs
#17,748,987
of 22,792,160 outputs
Outputs from Probiotics and Antimicrobial Proteins
#274
of 541 outputs
Outputs of similar age
#173,412
of 255,121 outputs
Outputs of similar age from Probiotics and Antimicrobial Proteins
#6
of 8 outputs
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So far Altmetric has tracked 541 research outputs from this source. They receive a mean Attention Score of 3.6. This one is in the 41st percentile – i.e., 41% of its peers scored the same or lower than it.
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