2.5. In vivo antitumor experiment
To establish murine solid tumors H22 transplanted model, corresponding
ascites tumor cells (4 × 105 cells in 0.2 mL PBS) were
subcutaneously injected into the right axillary region of the Kunming
mice in all groups. Twenty-four hours after inoculation, mice
were divided randomly into five groups. CSP was administered
orally (p.o.) to each group at different dosages (50, 100, 200 mg/kg),respectively. The positive control group received cisplatin at a
dosage of 5 mg/kg by intraperitoneal injection and the vehicle control
group was treated with 0.9% normal saline via p.o. The mice
weights were recorded before and after each drug administration.
24 h after the last administration of tested drug on the 10th day
of the experiment, blood samples were collected from the mice’s
eyes and serum was harvested by centrifugation. Then, all the mice
were sacrificed and the whole bodies, the segregated tumor, thymus
and spleen of the mice were weighed immediately. The tumor
inhibitory rate was calculated by the following formula: tumor
inhibitory rate (%) = (WControl −WTreated)/WControl × 100. WTreated
and WControl were the average tumor weight of the treated and
vehicle control mice, respectively
2.5. In vivo antitumor experimentTo establish murine solid tumors H22 transplanted model, correspondingascites tumor cells (4 × 105 cells in 0.2 mL PBS) weresubcutaneously injected into the right axillary region of the Kunmingmice in all groups. Twenty-four hours after inoculation, micewere divided randomly into five groups. CSP was administeredorally (p.o.) to each group at different dosages (50, 100, 200 mg/kg),respectively. The positive control group received cisplatin at adosage of 5 mg/kg by intraperitoneal injection and the vehicle controlgroup was treated with 0.9% normal saline via p.o. The miceweights were recorded before and after each drug administration.24 h after the last administration of tested drug on the 10th dayof the experiment, blood samples were collected from the mice’seyes and serum was harvested by centrifugation. Then, all the micewere sacrificed and the whole bodies, the segregated tumor, thymusand spleen of the mice were weighed immediately. The tumorinhibitory rate was calculated by the following formula: tumorinhibitory rate (%) = (WControl −WTreated)/WControl × 100. WTreatedand WControl were the average tumor weight of the treated andvehicle control mice, respectively
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