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Example 23
We have demonstrated that LXR agonists inhibit in vitro cancer progression phenotypes in breast cancer, pancreatic cancer, and renal cancer. To investigate if LXR agonist treatment inhibits breast cancer primary tumor growth in vivo, mice injected with MDA-468 human breast cancer cells were treated with either a control diet or a diet supplemented with LXR agonist GW3965 2 (
To determine the effect of orally delivered GW3965 2 on breast cancer tumor growth, 2×106 MDA-468 human breast cancer cells were resuspended in 50 μL PBS and 50 μL matrigel and the cell suspension was injected into both lower memory fat pads of 7-week-old Nod Scid gamma female mice. The mice were assigned to a control diet treatment or a GW3965-supplemented diet treatment (75 mg/kg/day) two days prior to injection of the cancer cells. The GW3965 2 drug compound was formulated in the mouse chow by Research Diets, Inc. Tumor dimensions were measured using digital calipers, and tumor volume was calculated as (small diameter)2×(large diameter)/2.
Treatment with GW3965 resulted in significant reduction in breast cancer tumor size in vivo (
Example 11
Small molecule agonists of the Liver X Receptor (LXR) have previously been shown to increase Apo E levels. To investigate whether increasing Apo-E levels via LXR activation resulted in therapeutic benefit, assays were carried out to assess the effect of the LXR agonist GW3965 [chemical name: 3-[3-[N-(2-Chloro-3-trifluoromethylbenzyl)-(2,2-diphenylethyl)amino]propyloxy]phenylacetic acid hydrochloride) on Apo-E levels, tumor cell invasion, endothelial recruitment, and in vivo melanoma metastasis (