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Deprecated: Implicit conversion from float 235.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 mSphere 2017 ; 2 (4): ä Nephropedia Template TP
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Lactoferricin Peptides Increase Macrophages Capacity To Kill Mycobacterium avium #MMPMID28875176
Silva T; Moreira AC; Nazmi K; Moniz T; Vale N; Rangel M; Gomes P; Bolscher JGM; Rodrigues PN; Bastos M; Gomes MS
mSphere 2017[Jul]; 2 (4): ä PMID28875176show ga
The genus Mycobacterium comprises several pathogenic species, including M. tuberculosis, M. leprae, M. avium, etc. Infections caused by these bacteria are particularly difficult to treat due to their intrinsic impermeability, low growth rate, and intracellular localization. Antimicrobial peptides are increasingly acknowledged as potential treatment tools, as they have a high spectrum of activity, low tendency to induce bacterial resistance, and immunomodulatory properties. In this study, we show that peptides derived from bovine lactoferricin (LFcin) improve the antimicrobial activity of ethambutol against Mycobacterium avium growing inside macrophages. Moreover, the d-enantiomer of a short version of lactoferricin containing amino acids 17 to 30 (d-LFcin17?30) causes intramacrophagic death of M. avium by increasing the formation of lysosomes and autophagosomes. This work opens the way to the use of lactoferricin-derived peptides to treat infections caused by mycobacteria and highlights important modulatory effects of d-FLcin17?30 on macrophages, which may be useful under other conditions in which macrophage activation is needed.