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Table 1 IC50 values (μmol/L) of betulinic acid for primary equine cells determined by CVS and MTS assay

From: Betulinic acid shows anticancer activity against equine melanoma cells and permeates isolated equine skin in vitro

cells

24 h

48 h

96 h

MTS assay

 eRGO1

22.8 (−3–48)

20.7 (13–29)

12.7 (11–15)

 MelDuWi

34.6 (24–45)

31.7 (25–38)

23.6 (13–34)

 PriFi1

20.4 (19–22)

18.0 (17–19)

13.8 (7–21)

 PriFi2

24.8 (11–39)

22.7 (1–49)

13.3 (11–16)

Crystal violet staining assay

 eRGO1

25.9 (20–32)

21.2 (− 2–44)

19.6 (11–29)

 MelDuWi

49.2 (31–67)

35.8 (− 22–94)

21.6 (5–38)

 PriFi1

58.0 (52–64)

52.2 (39–65)

14.5 (14–15)

 PriFi2

30.3 (17–44)

29.1 (6–53)

13.8 (10–18)

  1. Cytotoxic (MTS assay) and antiproliferative (crystal violet staining assay) effects of betulinic acid on primary equine melanoma cells (eRGO1 and MelDuWi) and primary equine dermal fibroblasts (PriFi1 and PriFi2) after a treatment duration of 24, 48, or 96 h. Data represent mean IC50 values (μmol/L) of 6–8 independent experiments with 95% confidence interval in parentheses