Journal: Neoplasia (New York, N.Y.)
Article Title: Panobinostat enhances olaparib efficacy by modifying expression of homologous recombination repair and immune transcripts in ovarian cancer
doi: 10.1016/j.neo.2021.12.002
Figure Lengend Snippet: Panobinostat alone and combined with olaparib increases macrophage recruitment, decreases M2 macrophages and increases CD8-positive T cell infiltration in the tumor microenvironment. C57BL/6 mice were injected with ID8-luc cells. 30 days after injection, mice were treated with vehicle, panobinostat (2.5 mg/kg 5 times weekly PO), olaparib (100 mg/kg 5 times weekly PO) or the panobinostat + olaparib combination or 4 weeks. (A) Representative images of tumors stained for F4/80 (green), Arg-1 (red), and DAPI (nuclei; blue). Separate staining for CD8 (red) is also shown. In harvested tumors, (B) counts of the percentage of F4/80-positive macrophages per high-powered field (HPF), (C) percentage of arginase-1 (Arg-1) positive cells, (D) the ratio of Arg-1 positive to F4/80 positive cells, and (E) the of CD8 positive cells. Counts were quantified from 5 representative HPF from each sample. * p < 0.05 single drug effect relative to vehicle; a p < 0.01 combination drug effect relative to olaparib alone, b p < 0.01 combination drug effect relative to panobinostat alone; Mann-Whitney test (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.).
Article Snippet: Fluorescent-IHC image acquisition and analysis of co-staining for the pan-macrophage marker F4/80 (1:200 rat polyclonal anti-mouse F4/80, AbD Serotec, Oxford, UK), and the M2 macrophage marker arginase-1 (1:200; rabbit polyclonal anti-arginase-1, GeneTex, Irvine, CA), and separately for the cytotoxic T cell marker CD8 (1:100; rat monoclonal anti-mouse CD8, Novus Biologicals, Centennial, CO), was performed as previously described .
Techniques: Injection, Staining, MANN-WHITNEY