Supplementary Data

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Nanoscale analysis of the effects of antibiotics and CX1 on Pseudomonas aeruginosa

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multidrug-resistant

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C. Formosa

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R. E. Duval

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(LAAS), Toulouse, France

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Centre National de la Recherche Scientifique, Toulouse, France

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Université de Toulouse, Toulouse, France

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SRSMC, Université de Lorraine - CNRS, Nancy, France

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ABC Platform , Nancy, France

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Laboratoire de Bactériologie Hygiène, Institut Fédératif de Biologie, Toulouse, France

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, M. Grare , E. Jauvert

and E. Dague

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, A. Coutable

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, J. B. Regnouf-de-Vains , M. Mourer

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Centre National de la Recherche Scientifique, Laboratoire d’Analyse et d’Architecture des systèmes

®

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* Corresponding author: Etienne Dague, LAAS-CNRS, 31000 Toulouse, France, [email protected], phone:

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0033561337841

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Supplementary Data 1 Antibiotic susceptibility profile of PaR3 (obtained with automated Vitek2 system, BioMérieux, France).

Antibiotic MIC

Results

Ticarcillin

≥ 128

Resistant

Ticarcillin + clavulanic acid

≥ 128

Resistant

Piperacillin

≥ 128

Resistant

Piper + tazobactam

≥ 128

Resistant

Ceftazidim

4

Sensitive

Aztreonam

16

Sensitive

Imipenem

≥ 16

Resistant

Meropenem

≥ 16

Resistant

Tobramycin

≥ 16

Resistant

Gentamicin

≥ 16

Resistant

Amikacin

4

Sensitive

Minocyclin

4

Resistant

Colistin

≤ 0,5

Sensitive

Trimetoprim – Sulfamet.

≥ 320

Resistant

Pefloxacin

4

Intermediate

Ciprofloxacin

1

Sensible

Cefepim

16

Intermediate

Supplementary Data 2

Imaging of P. aeruginosa ATCC 27853 and PaR3. Height images (z-range = 1 µm) recorded on a, native P. aeruginosa ATCC 27853 cells, e, ticarcillin-treated cells (4 µg/mL), i, tobramycin-treated cells (0.25 µg/mL) and m, Cx1-treated cells (16 µg/mL). b, f, j, and n, vertical deflection images corresponding to the previous height images. Height images (zrange = 1 µm) of c, native PaR3 cells, g, ticarcillin-treated cells (4 µg/mL), k, tobramycintreated cells (0.25 µg/mL) and o, Cx1-treated cells (32 µg/mL). d, h, l, p, vertical deflection images corresponding to the previous height images. Vertical cross-sections taken along the solid lines on native cells (black lines), ticarcillin-treated cells (red lines), tobramycin-treated cells (blue lines) and Cx1-treated cells (green lines) on q, P. aeruginosa ATCC 27853, and s, PaR3. Horizontal cross-sections taken along the dashed lines on r, P. aeruginosa ATCC 27853 and t, PaR3.

Supplementary Data 3

Imaging of P. aeruginosa ATCC 27853 and PaR3. a, schematic representation of the PSD analysis. b, Root Mean square formula. Height images (z-range = 15 nm) recorded on c, P. aeruginosa ATCC 27853 native cells, d, ticarcillin-treated cells (4 µg/mL), e, tobramycintreated cells (0.25 µg/mL), and f, Cx1-treated cells (16 µg/mL). Height images (z-range = 15 nm) recorded on g, PaR3 native cells, h, ticarcillin-treated cells (4 µg/mL), i, tobramycintreated cells (0.25 µg/mL), and j, Cx1-treated cells (32 µg/mL). Panel k shows the roughness measured on the height images of P. aeruginosa ATCC 27853 native cells (black line), ticarcillin-treated cells (red line), tobramycin-treated cells (blue line) and Cx1-treated cells (green line). Panel l shows the roughness measured on the height images of PaR3.

Supplementary Data 4

Mapping of P. aeruginosa cell surface elasticity. a, vertical deflection image of native cells, e, ticarcillin-treated cells (4 µg/mL), i, tobramycin-treated cells (0.25 µg/mL). m, height image (z-range = 800 nm) of Cx1-treated cells (32 µg/mL). b, f, j and n, elasticity maps (zrange = 1.5 MPa) corresponding to the vertical deflection images. c, g, k and o, local elasticity maps (z-range = 800 kPa) recorded on one bacterium from the corresponding vertical deflection images. d, h, l and p, distributions of Young Modulus values corresponding to the local elasticity maps.

Supplementary Data 5

POPE:POPG (2:1) supported bilayers. a, height images (z-range = 1.5 nm) of POPE:POPG supported bilayers at different times (0, 1, 2 and 3h) withtout any treatment. b, height images (z-range = 1.5 nm) of POPE:POPG supported bilayers treated by Cx1 (32 µg/mL) at different times (0, 1, 2 and 3h).