Journal: International Journal of Biological Sciences
Article Title: The TRPM7 inhibitor carvacrol suppresses angiogenesis and vasculogenic mimicry in triple-negative breast cancer
doi: 10.7150/ijbs.130027
Figure Lengend Snippet: Carvacrol inhibits angiogenesis in vitro , ex vivo , and in vivo . A: Chemical structure of carvacrol. B: Viability (% of 0 µM) of HUVECs, HDMECs, MDA-MB-231, HCC1937, and 4T1 cells that were treated for 48 h with a serial dilution of carvacrol, as assessed by WST-1 assay (n = 4-5). C: Cytotoxicity (% of total cell death) of carvacrol against HUVECs, as assessed by LDH assay (n = 4). The cells were treated with a serial dilution of carvacrol for 24 h. D: Proliferation (% of 0 µM) of HUVECs that were treated for 24 h with 0, 50, 100, and 200 µM carvacrol, as assessed by BrdU incorporation assay (n = 4 independent experiments). E: Representative images of migrated HUVECs. The cells were treated with 0, 50, 100, and 200 µM carvacrol for 24 h prior to the assay. Scale bar: 70 µm. F: Migration (% of 0 µM) of treated HUVECs depicted in (E), as assessed by Transwell migration assay (n = 3). G: Representative images of tube-forming HUVECs that were treated for 18 h with 0, 50, 100, and 200 µM carvacrol. Scale bar: 720 µm. H: Tube formation (% of 0 µM) of treated HUVECs depicted in (G), as assessed by tube formation assay (n = 6). I: Representative images of HUVEC spheroids that were treated for 24 h with 0, 50, 100, and 200 µM carvacrol. Scale bar: 85 µm. J: Sprouting (% of 0 µM) of treated HUVEC spheroids depicted in (I), as assessed by spheroid sprouting assay (n = 15). K: Representative images of mouse aortic rings after 6-day treatment with 0, 50, 100, and 200 µM carvacrol. Scale bar: 1 mm. L: Sprouting (% of 0 µM) of treated aortic rings depicted in (K), as assessed by aortic ring assay (n = 6). M: Representative images of Matrigel plugs containing 0.1% DMSO (vehicle) or 200 µM carvacrol. The sections were stained with an anti-CD31 antibody (red) and Hoechst 33342 (blue) to visualize ECs and cell nuclei, respectively. Scale bar: 30 µm. N: CD31 + microvessel density (% of vehicle) in Matrigel plugs depicted in (M), as assessed by immunohistochemistry (n = 8). Data are presented as means ± SEM. ** P < 0.01, *** P < 0.001; ns, not significant.
Article Snippet: Murine TNBC 4T1 cells (RRID:CVCL_A4BM; ATCC, Wesel, Germany) and human TNBC HCC1937 cells (ATCC) were cultured in RPMI 1640 medium (PAN-Biotech GmbH, Aidenbach, Germany) supplemented with 10% fetal calf serum (FCS; PAN-Biotech), 100 U/mL penicillin (PAN-Biotech), and 0.1 mg/mL streptomycin (PAN-Biotech).
Techniques: In Vitro, Ex Vivo, In Vivo, Serial Dilution, WST-1 Assay, Lactate Dehydrogenase Assay, BrdU Incorporation Assay, Migration, Transwell Migration Assay, Tube Formation Assay, Aortic Ring Assay, Staining, Immunohistochemistry