Lactobacillus GG (LGG) Peptides Can Inhibit Antibiotic-Resistant Bacteria Growth

ISSN: 2211-3533 (Online)
ISSN: 2211-3525 (Print)

Volume 15, 2 Issues, 2017

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Anti-Infective Agents

Formerly: Anti-Infective Agents in Medicinal Chemistry

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Lactobacillus GG (LGG) Peptides Can Inhibit Antibiotic-Resistant Bacteria Growth

Anti-Infective Agents, 9(2): 48-51.

Author(s): Ruiliang Lu, James P. Nataro and Alessio Fasano.

Affiliation: Mucosal Biology Research Center, Department of Pediatrics, University of Maryland School of Medicine, Room S316 20 Penn Street, Baltimore MD, 21201, USA.


Background: We have recently reported that Lactobacillus GG (LGG) elaborates seven small peptides that exert both anti- Gram-negative and Gram-positive bactericidal activity. Among them, peptides NPSRQERR, VHTAPK and PDENK have higher activity than others. Here we further report the inhibitory function of these three peptides on antibiotic- resistant bacterial strains and preliminary structure-activity analysis. Methods: Peptides were synthesized, purified, and dissolved in related media. Lactobacillus GG conditioned medium was used as a positive control and media alone or homologous-conditioned medium were used as negative controls. A600 measurement was used to measure antibacterial activity. Results: LGG-derived peptides NPSRQERR, VHTAPK and PDENK were found to inhibit growth of kanamycin-resistant E. coli SM10 δpir and tetracycline-resistant E. coli TOPO10. Moreover, growth of methicillin-resistant Staphylococcus aureus (MRSA) was also found to be inhibited by peptides NPSEQERR, VHTAPK and PDENK. Structurefunction analyses revealed that the anti-bacterial properties of these peptides can be increased or decreased by modification of amino acid charge.


Lactobacillus GG, peptide, antibiotic-resistant bacteria, Methicillin resistant Staphylococcus aureus (MRSA).

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Article Details

Volume: 9
Issue Number: 2
First Page: 48
Last Page: 51
Page Count: 4
DOI: 10.2174/187152110791383760
Price: $58

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