2.7. In Vivo Assay of Test Compounds on P. berghei ANKA
Strain. In vivo anti-malarial activity was carried out using 5
groups ofmice (Balb/C, 28 g ±4 g, n = 4).Micewere injected
intraperitoneally with P. berghei ANKA-infected mouse
blood (approximately 40% parasitemia) on day 1, at a density
of 1 × 107 parasites (approximately) of the strain. The test
compounds (AND, AS, CUR, AND+AS, and AND+CUR)
were dissolved in DMSO and serum-free media to make
the desired concentrations and were injected (15mg/kg
of body weight) intraperitoneally to individual groups of
animals starting from 24 h prior to the parasite challenge
(day 0). The control mice were maintained simultaneously
without any treatment. Injections were continued daily
till the death of the animals in the control group (13–
15 days). Parasitemia levels (parasitized erythrocytes/total
erythrocytes) were determined with thin blood smears on
every alternate day from day 5 onwards of posttreatment
(Figure 1(f)). The animal experiments complied with all
relevant guidelines and institutional policies on animal
ethics and were conducted under environmentally controlled
condition, as reported earlier [3].