Transient expression and characterization of the antimicrobial peptide protegrin-1 in Nicotiana tabacum for control of bacterial and fungal mammalian pathogens

Omar Patiño-Rodríguez, Benita Ortega-Berlanga, Yessica Y. Llamas-González, Mario A. Flores-Valdez, Areli Herrera-Díaz, Roberto Montes-de-Oca-Luna, Schuyler S. Korban, Ángel G. Alpuche-Solís

Research output: Contribution to journalArticle

Abstract

Mammalian infectious diseases are widespread, and some are becoming difficult to control due to inappropriate use of antibiotics. This has contributed to incidence of bacterial strains with resistance to commonly used antibiotics. Thus, effective alternative antibiotics are essential for treatment of infectious diseases. Antimicrobial peptides are viable alternatives to address this problem. Among those, protegrin-1 (PG-1) is a broad-spectrum antimicrobial peptide. In this study, a magnICON was used to express the PG-1 peptide in Nicotiana tabacum, using a transient expression system mediated by Agrobacterium tumefaciens transfection. Reverse-transcriptase polymerase chain reaction (RT-PCR) and Northern blot analyses of transformed N. tabacum were employed to detect viral replicons, 290 bp and 6.1 kb. SDS/PAGE revealed presence of a band corresponding to the molecular weight of PG-1 (2.1 kDa), which was absent in wild-type N. tabacum. Antimicrobial/antifungal assays of protein extracts from transiently transformed N. tabacum were performed, and these demonstrated that PG-1 peptide activity in these plant tissues was viable and contributed to inhibition of 53.2 % of Klebsiella pneumoniae, 70.2 %, of Staphylococcus aureus, 56.6 % of Escherichia coli, 72 % of Mycobacterium bovis BCG, and 70 % of Candida albicans cultures. No inhibition of any of these fungal and bacterial pathogens was detected when wild-type N. tabacum extracts were used. Therefore, PG-1 produced in plant cells of infiltrated tobacco was active and controlled growth of several bacterial and fungal human pathogens.

Original languageEnglish (US)
Pages (from-to)99-106
Number of pages8
JournalPlant Cell, Tissue and Organ Culture
Volume115
Issue number1
DOIs
StatePublished - Oct 1 2013

Keywords

  • Alternative antibiotics
  • magnICON
  • Protegrin-1
  • TMV
  • Tobacco

ASJC Scopus subject areas

  • Horticulture

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    Patiño-Rodríguez, O., Ortega-Berlanga, B., Llamas-González, Y. Y., Flores-Valdez, M. A., Herrera-Díaz, A., Montes-de-Oca-Luna, R., Korban, S. S., & Alpuche-Solís, Á. G. (2013). Transient expression and characterization of the antimicrobial peptide protegrin-1 in Nicotiana tabacum for control of bacterial and fungal mammalian pathogens. Plant Cell, Tissue and Organ Culture, 115(1), 99-106. https://doi.org/10.1007/s11240-013-0344-9