Table 1 MICs and MBCs of sphingosine, short-chain C6-ceramide, long-chain C16-ceramide and C6/C16-ceramide analogs against N. meningitidis, N. gonorrhoeae, E. coli and S. aureus.

From: Antibacterial activity of ceramide and ceramide analogs against pathogenic Neisseria

Compound

N. meningitidis (MC58)

N. gonorrhoeae (FA1090)

a*MIC

**MIC>50

#MBC

*MIC

**MIC>50

#MBC

sphingosine

4

1.97

4

4

1.25

8

C6-ceramide

2

0.69

64

1

0.18

>64

α-C6-ceramide

>64

>64

>64

>64

ω-C6-ceramide

2

0.8

4

2

0.8

4

C16-ceramide

16

8.39

>64

>64

>64

α-C16-ceramide

64

16.4

64

32

21

64

ω-C16-ceramide

>64

>64

>64

>64

Compound

E. coli ATCC 25922

S. aureus ATCC 29213

a* MIC

** MIC >50

# MBC

* MIC

** MIC >50

# MBC

sphingosine

16

8.39

16

8

1.22

>64

C6-ceramide

>64

>64

>64

>64

α-C6-ceramide

>64

>64

>64

>64

ω-C6-ceramide

>64

>64

>64

>64

C16-ceramide

>64

>64

>64

>64

α-C16-ceramide

>64

>64

>64

>64

ω-C16-ceramide

>64

>64

>64

>64

  1. aMIC and MBC (µg/ml)
  2. *MIC is defined as the lowest concentration of lipid that reduced growth by more than 95%
  3. **MIC>50 is defined as the lowest concentration of lipid that reduced growth by more than 50%
  4. #MBC is defined as the lowest concentration of lipid that prevented growth.