Fig. 3. Paclitaxel promotes TMEM-dependent vascular permeability, cancer cell dissemination, and metastasis in breast cancer. Paclitaxel promotes TMEM-dependent.

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Presentation transcript:

Fig. 3. Paclitaxel promotes TMEM-dependent vascular permeability, cancer cell dissemination, and metastasis in breast cancer. Paclitaxel promotes TMEM-dependent vascular permeability, cancer cell dissemination, and metastasis in breast cancer. (A) Time-lapse images from videos S1 (top row) and S3 (bottom row). Time shown in minutes (t = 0 to 20 min). Top row: Arrowhead follows site of bursting from an active TMEM in a paclitaxel-treated mouse. Bottom row: Arrowhead marks the lack of bursting from an inactive TMEM in a paclitaxel-treated mouse. Scale bar, 50 μm. (B) Incidence of bursting (at least one complete event during ~4.5 hours of imaging per mouse) in paclitaxel- and vehicle-treated MMTV-PyMT/Dendra2 cfms-CFP mice. (C) Frequency of bursting in paclitaxel and control MMTV-PyMT/Dendra2 cfms-CFP mice. Mann-Whitney U test. (D) Representative blood vessel (endomucin) and extravascular dextran masks, as obtained by IF in mice treated with either vehicle or paclitaxel, showing TMEM-associated vascular permeability (yellow area). Scale bar, 100 μm. (E) Quantification of extravascular dextran area normalized to blood vessel area in mice treated with either vehicle or paclitaxel shown in (D). Mann-Whitney U test. (F) CTCs per milliliter of blood collected before sacrifice (day 15). Values normalized to the control group in each case to account for intercohort variability. Mann-Whitney U test. (G) Correlation between CTCs and TMEM. R2 = Pearson’s coefficient of determination; filled circles, control; open circles, paclitaxel. (H) Detection of micrometastatic foci in the lungs of paclitaxel-treated mice. Two cases of histologically detectable metastases in lungs of PyMT transplants and HT17 xenografts, respectively, are shown. Scale bar, 100 μm. (I) Incidence of lung metastasis in mice treated with paclitaxel or vehicle control, χ2 test. (J) Quantification of histologically detectable lung metastases in mice treated with paclitaxel or vehicle control. Mann-Whitney U test. (K) Stereomicroscopy in extracted mouse lung. Blood vessels visualized via tail vein injection of rhodamine-labeled lectin 1 hour before sacrifice, and cancer cells identified through Dendra2 expression (arrow). Mann-Whitney U test. Scale bar, 20 μm. (L) Quantification of single cancer cell dissemination in lungs of PyMT transplants using fluorescence stereomicroscopy. Mann-Whitney U test. George S. Karagiannis et al., Sci Transl Med 2017;9:eaan0026 Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works