Identification of Antibacterial Molecule(s) from Animals Living in Polluted Environments.
Animals
Anti-Bacterial Agents
/ isolation & purification
Biological Products
/ isolation & purification
Environmental Microbiology
/ standards
Escherichia coli
/ drug effects
Humans
Klebsiella pneumoniae
/ drug effects
Lizards
/ blood
Methicillin-Resistant Staphylococcus aureus
/ drug effects
Microbial Sensitivity Tests
Pseudomonas aeruginosa
/ drug effects
Rats
Serum
/ chemistry
Snakes
/ blood
Tissue Extracts
/ isolation & purification
Antibacterial activity
E. coli
MRSA
cytotoxicity
human cells
polluted environment.
Journal
Current pharmaceutical biotechnology
ISSN: 1873-4316
Titre abrégé: Curr Pharm Biotechnol
Pays: Netherlands
ID NLM: 100960530
Informations de publication
Date de publication:
2020
2020
Historique:
received:
16
05
2019
revised:
10
09
2019
accepted:
13
09
2019
pubmed:
3
10
2019
medline:
4
7
2020
entrez:
3
10
2019
Statut:
ppublish
Résumé
Snakes feed on germ-infested rodents, while water monitor lizards thrive on rotten matter in unhygienic conditions. We hypothesize that such creatures survive the assault of superbugs and are able to fend off disease by producing antimicrobial substances. In this study, we investigated the potential antibacterial activity of sera/lysates of animals living in polluted environments. Snake (Reticulatus malayanus), rats (Rattus rattus), water monitor lizard (Varanus salvator), frog (Lithobates catesbeianus), fish (Oreochromis mossambicus), chicken (Gallus gallus domesticus), and pigeon (Columba livia) were dissected and their organ lysates/sera were collected. Crude extracts were tested for bactericidal effects against neuropathogenic E. coli K1, methicillin-resistant Staphylococcus aureus (MRSA), Streptococcus pyogenes, Pseudomonas aeruginosa, Bacillus cereus and Klebsiella pneumoniae. To determine whether lysates/sera protect human cells against bacterialmediated damage, cytotoxicity assays were performed by measuring lactate dehydrogenase release as an indicator of cell death. Lysates/sera were partially characterized using heat-treatment and pronasetreatment and peptide sequences were determined using the Liquid Chromatography Mass Spectrometry (LC-MS). Snake and water monitor lizard sera exhibited potent broad-spectrum bactericidal effects against all bacteria tested. Heat inactivation and pronase-treatment inhibited bactericidal effects indicating that activity is heat-labile and pronase-sensitive suggesting that active molecules are proteinaceous in nature. LCMS analyses revealed the molecular identities of peptides. The results revealed that python that feeds on germ-infested rodents and water monitor lizards that feed on rotten organic waste possess antibacterial activity in a heat-sensitive manner and several peptides were identified. We hope that the discovery of antibacterial activity in the sera of animals living in polluted environments will stimulate research in finding antibacterial agents from unusual sources as this has the potential for the development of novel strategies in the control of infectious diseases.
Sections du résumé
BACKGROUND
BACKGROUND
Snakes feed on germ-infested rodents, while water monitor lizards thrive on rotten matter in unhygienic conditions. We hypothesize that such creatures survive the assault of superbugs and are able to fend off disease by producing antimicrobial substances. In this study, we investigated the potential antibacterial activity of sera/lysates of animals living in polluted environments.
METHODS
METHODS
Snake (Reticulatus malayanus), rats (Rattus rattus), water monitor lizard (Varanus salvator), frog (Lithobates catesbeianus), fish (Oreochromis mossambicus), chicken (Gallus gallus domesticus), and pigeon (Columba livia) were dissected and their organ lysates/sera were collected. Crude extracts were tested for bactericidal effects against neuropathogenic E. coli K1, methicillin-resistant Staphylococcus aureus (MRSA), Streptococcus pyogenes, Pseudomonas aeruginosa, Bacillus cereus and Klebsiella pneumoniae. To determine whether lysates/sera protect human cells against bacterialmediated damage, cytotoxicity assays were performed by measuring lactate dehydrogenase release as an indicator of cell death. Lysates/sera were partially characterized using heat-treatment and pronasetreatment and peptide sequences were determined using the Liquid Chromatography Mass Spectrometry (LC-MS).
RESULTS
RESULTS
Snake and water monitor lizard sera exhibited potent broad-spectrum bactericidal effects against all bacteria tested. Heat inactivation and pronase-treatment inhibited bactericidal effects indicating that activity is heat-labile and pronase-sensitive suggesting that active molecules are proteinaceous in nature. LCMS analyses revealed the molecular identities of peptides.
CONCLUSION
CONCLUSIONS
The results revealed that python that feeds on germ-infested rodents and water monitor lizards that feed on rotten organic waste possess antibacterial activity in a heat-sensitive manner and several peptides were identified. We hope that the discovery of antibacterial activity in the sera of animals living in polluted environments will stimulate research in finding antibacterial agents from unusual sources as this has the potential for the development of novel strategies in the control of infectious diseases.
Identifiants
pubmed: 31577204
pii: CPB-EPUB-101145
doi: 10.2174/1389201020666191002153435
doi:
Substances chimiques
Anti-Bacterial Agents
0
Biological Products
0
Tissue Extracts
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
425-437Informations de copyright
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