Table 3 Summary of the cytotoxicity, cell viability and hemolytic results of antibiotics and synthetic peptides (in µg/ml concentration).

From: Hybrid derivative of cathelicidin and human beta defensin-2 against Gram-positive bacteria: A novel approach for the treatment of bacterial keratitis

Types

Agents

LC50

Lmax (%)

IC50

Imax (%)

HC50

Hmax (%)

Antibiotics

Amikacin

 > 200

0.0 (0.1)

 > 200

100.1 (7.3)

 > 200

0.0

Levofloxacin

 > 200

1.2 (0.7)

 > 200

108.0 (2.8)

 > 200

0 (0.0)

First-generation peptides

DD12

DD13

DD32

CaD1

CaD2

 > 200

2.9 (2.2)

 > 200

1.9 (7.3)

CaD3

Second-generation peptides

CaD21

 > 200

43.9 (1.0)

CaD22

 > 200

34.3 (8.2)

CaD23

 > 200

26.6 (6.5)

54.6 (11.7)

69.6 (7.8)

 > 200

7.1 (3.0)

  1. The cytotoxicity and cell viability results were obtained after 3 h of treatment whereas hemolytic effect of treatment was examined after 1 h of treatment.
  2. Results are presented in mean (SD) of two independent experiments performed in biological duplicate. Toxicity results of some peptides were missing because their antimicrobial efficacy was poor and hence toxicity was not determined.
  3. LC50: concentration of treatment causing 50% cytotoxicity; Lmax (%): percentage of cytotoxicity at 200 µg/ml treatment concentration; IC50: concentration of treatment causing 50% inhibition of cell viability; Imax (%): percentage of inhibition of cell viability at 200 µg/ml treatment concentration; HC50: concentration of treatment causing 50% hemolysis; Hmax (%): percentage of hemolysis at 200 µg/ml treatment concentration.