EMBO/sd-character-level-ner huggingface dataset:
Figure 5Representative microscopic views show that NID1 and FBLN2 are highly expressed in the human colonic ganglia (Black arrowheads) and interconnecting nerve fibers, and in a limited level throughout the epithelium (n=3). Scale bar, 50 µm. Addition of NID1&FBLN2 to the Matrigel® dome significantly enhances the relative growth rate of HIOs after five days of culture as compared to the PBS control condition. Compared to the PBS-control condition (white), stimulation with NID1&FBLN2 (black) enhanced the proliferation rate of HCT116 cells after 72 hours, but did not affect Caco-2 cell proliferation. The migration rate of HCT116 cells was already significantly increased 24 hours after addition of NID1&FBLN2 (black), whereas the migration of Caco-2 cells only significantly increased after 48 hours of culture with NID1&FBLN2 (black). Box plot reflecting the quantitative nanoLC-MS/MS analysis results shows the up-regulation of NID1 and FBLN2 in the colorectal cancer tissue secretome (n=17) compared to the normal colon tissue secretome (n=17). Data are analyzed with R version 3.5.2 and the ibb R package. Within the box plots, each dot represents the log10 transformed raw count of an individual sample; the inside band is the median value; the bottom and top of the box the first and third quartile, respectively; and the whiskers reflect the minimum and maximal values within 1.5× the interquartile range. Representative images of human colonic cancer epithelium (n=3) shows a high scattered expression of NID1 and FBLN2 within the cancerous epithelium. Scale bar, 50 μm.
Autoreactivity of iNKT cell is CD1d dependent A: Thapsigargin or αGalCer treated J774.Figure 2Thapsigargin or αGalCer treated J774.2 cells were cocultured with 2C12 in the presence or absence of the murine CD1d-specific antibody (black circles) or isotype (red squares) for 16 hours. The addition of an anti-CD1d antibody blocked the activation of 2C12 demonstrating that the NKT-cell activation was CD1d-specific. Graphs show mean ± SEM from n=2 biological replicates. Bar graph represents IL-2 secretion by NKT cell hybridoma (2C12) co-cultured murine macrophage cell line (J774.2) treated either with thapsigargin- or tunicamycin-treated CD1d knockdown (white bars) or untransfected (black bars). Knockdown of CD1d blocked IL-2 secretion by 2C12. In total, n=2 biological replicates were performed (three technical replicates per biological replicate). Graphs show mean ± SEM of each biological replicate. Bar graph represents IL-2 secretion by NKT cell hybridoma (2C12) co-cultured either with thapsigargin- or tunicamycin-treated primary BMDM isolated from CD1d-/- (white bars) or wild type (black bars) mice. 2C12 cocultured with CD1d-/- BMDMs resulted in reduced IL-2 secretion. Graphs show mean ± SEM from n=3 biological replicates. ***P < 0.001 (Unpaired t test).
GRA15 enhanced susceptibility of the type II Pru strain in IFNγ-stimulated MEFs is dependent on TRAF6 A) Immunoprecipitations and Western blots were performed on MEFs stimulated or not with IFNγ (100 U/ml) and infected with an RH strain expressing type II GRA15-HA and as a control RH expressing GRA45-HA.Figure 6A) Immunoprecipitations and Western blots were performed on MEFs stimulated or not with IFNγ (100 U/ml) and infected with an RH strain expressing type II GRA15-HA and as a control RH expressing GRA45-HA. The blots using antibodies against TRAF6 and TRAF2 were made after stripping the first blot. Left panel and right panel were run on a single gel; vertical white lines indicate excision of irrelevant lanes. B) IFNγ-stimulated MEFs were infected with Pru, PruΔgra15 and RH for 3 h and subsequently stained for TRAF6. On the right-hand side, a representative fluorescent image is shown for the Toxoplasma Pru strain, which expresses GFP. DNA was stained with Hoechst 33258. Scale bar is 10 µm. The yellow box inside each representative image is shown as an inset picture with magnification. Experiments were performed 3 times. C) IRGB6 staining on PVM after infection of wild-type or Traf6 -/- MEFs for 3 h with Pru, PruΔgra15 and RH. On the right-hand side, a representative fluorescent image is shown of IRGB6 coating on the PVM of both wild-type and Traf6 -/- MEF. Scale bar is 10 µm. At least 100 different vacuoles were observed and analyzed for each experiment (n=3). D) Parasite growth was measured 24 h p.i. using luciferase readout from unstimulated and IFNγ-stimulated wild-type, NFκB p65-/- and Traf6 -/- MEFs. Growth was compared between Pru, PruΔgra15 and PruΔgra15+GRA15 (complemented) strains. Reading from unstimulated cells was considered as 100% and percentage growth in IFNγ-stimulated cells was expressed relative to unstimulated cells. Experiments were performed three times with each MEF type. E) Immunoprecipitation and Western blot were performed in MEFs infected with RH+GRA15WT, RH+GRA15TRAF2mut or RH+GRA15TRAF2/6mut and as a control RH expressing GRA45-HA. Left panel and right panel were run on a single gel; vertical white lines indicate excision of irrelevant lanes. Full length blots are in the source data for this figure. The antibodies used against TRAF2 and TRAF6 were purchased from Cell Signaling Technology and Abnova, respectively. Immunofluorescence analysis of TRAF6, was done in IFNγ-stimulated MEFs infected with RH+GRA15WT, RH+GRA15TRAF2mut or RH+GRA15TRAF2/6mut (n=3). Immunofluorescence analysis of IRGB6, was done in IFNγ-stimulated MEFs infected with RH+GRA15WT, RH+GRA15TRAF2mut or RH+GRA15TRAF2/6mut (n=3). Immunofluorescence analysis of GBP1-5, was done in IFNγ-stimulated MEFs infected with RH+GRA15WT, RH+GRA15TRAF2mut or RH+GRA15TRAF2/6mut (n=3). Immunofluorescence analysis of p62 was done in IFNγ-stimulated MEFs infected with RH+GRA15WT, RH+GRA15TRAF2mut or RH+GRA15TRAF2/6mut (n=3). Immunofluorescence analysis of ubiquitin was done in IFNγ-stimulated MEFs infected with RH+GRA15WT, RH+GRA15TRAF2mut or RH+GRA15TRAF2/6mut (n=3). K) Plaque assays were performed with RH+GRA15WT, RH+GRA15TRAF2mut or RH+GRA15TRAF2/6mut (n=4).
EC8042 induces mesenchymal differentiation in rhabdoid tumor xenografts.Figure 8Immunohistochemistry analysis of H&E stains from G401 xenograft tumors on 1, 3, and 7-days after treatment with vehicle or 3-day EC8042 infusion. EC8042 treated xenograft tumors exhibit evidence of mesenchymal differentiation compared to vehicle. microCT analysis of xenograft tumors on 7-days after treatment exhibit enhanced calcification compared to vehicle. IHC scale bar (lower left): 100μm.
Figure 5A E2~Ub hydrolysis assays for U7BR/Ubc7 and Ubc6. E3-independent Ub discharge assays for both E2s in PBS (absence of nucleophile = hydrolysis) were performed at 32°C. Left: representative Coomassie gels. Right: Plots of E2~Ub hydrolysis (dots) as a function of time with first-order reaction models fitted to the discharge data (lines) are shown. Values for each time point are reported as mean ± standard deviation (n = 3). B HSQC-TROSY experiments comparing free and E2-conjugated (15N)Ub. Top: CSPs of (15N)Ub(G76C) conjugated to indicated E2s via disulfide bond (775 µM each) compared to free (15N)Ub(G76C) are shown; Ub resides known to be involved in the closed conformation interface are underlined in grey; * = number of resonances with perturbations too large to be assigned confidently (shown as off-scale in diagram). Bottom: Spectra of resonances for selected residues in Ub's hydrophobic patch for free Ub(G76C) (gray) and Ub conjugated to Ubc6 (green) and U7BR/Ubc7 (yellow). C Summary of T1 and T2 relaxation time analysis for (15N) Ub(G76C) in various E2 conjugates. The table shows the mean T1/T2 ratios ± standard deviation over all Ub peaks in a given conjugate (or for the free protein) as well as their molecular weights. Bottom: Cartoons depict open/closed conformation equilibria for different conjugates.
Dyn2 knockdown interferes with starvation-induced LD breakdown in Hep3B hepatocytes.Figure 1.(A) Hep3B hepatocytes were treated with nontargeting control siRNA (siNT) or siRNA targeting Dyn2 (siDyn2), followed by re-expression of either vector alone, or GFP-tagged versions of Dyn2, loaded with 150 µM oleate overnight and starved for 48 h in medium containing 0.1% FBS. LDs were visualized by immunofluorescence using Oil Red O staining. Cell boundaries are outlined and those cells re-expressing GFP, GFP-wtDyn2, or GFP--K44A are denoted with asterisks. Bars, 20 µM. (B) Representative blot showing the efficiency of the Dyn2 knockdown in these cells. (C and D) Quantitation of the average LD number and area (in pixels2) per cell from three independent experiments. The data are represented as mean ± SE. *, P ≤ 0.05; **, P ≤ 0.01. NS, not significant.
Figure 6Hemolytic activity of the Newman WT and isogenic mutant strains was measured by incubation of rabbit blood cells with serially diluted supernatants from 20 h cultures grown in MHB-ca medium without and with 25 mM glucose, 40 mM sodium pyruvate or 60 mM sodium acetate. Lysis was monitored by the release of hemoglobin. Data are expressed as average ± SD of five independent experiments. * Denotes p < 0.05, and *** denotes p < 0.001, ns denotes no significant compared to WT grown in MHB-ca and WT grown in MHB-ca + glucose via two-way ANOVA with Tukey's posttest.
Figure 6(A) Schematic representation of endogenous Rh1. Predicted glycosylation sites (N20 and N196) are shown in yellow. (B-D) Schematic representation of the Rh1 TMD1, TMD1-3 and TMD1-5 truncation constructs used to monitor glycosylation efficiency in Xport-A1 mutants. Predicted glycosylation sites are shown in yellow. (E-G) Western blot of fly heads labelled for V5, TRP, Rh1, Xport-A (Xp-A) and tubulin. (E) Immunoblot of fly heads expressing Rh1Gal4 (driver) (left) or Rh1 TMD1-V5 (right) in Xport-A heterozygous (Xport-A1/TM6B) or homozygous mutant flies (Xport-A1/Xport-A1). Extracts were untreated (-) or treated (+) with PNGase F enzyme (lanes 2, 4, 6 and 8). For Rh1Gal4, 4 fly heads were loaded per well, while for Rh1 TMD1-V5, 8 fly heads were loaded per well. (F) Immunoblot of fly heads expressing Rh1 TMD1-3-V5 in Xport-A heterozygous (Xport-A1/TM6B) or homozygous mutant flies (Xport-A1/Xport-A1). Extracts were untreated (-) or treated (+) with PNGase F enzyme (lanes 2 and 4). Eight fly heads were loaded per lane. (G) Immunoblot of fly heads expressing Rh1 TMD1-5-V5 in Xport-A heterozygote (Xport-A1/TM6B) or homozygous mutant flies (Xport-A1/Xport-A1). Extracts were untreated (-) or treated (+) with either Endo-H (lanes 2 and 5) or PNGase F enzyme (lanes 3 and 6). Each lane contains approximately 2,5 fly heads.
QKI plays a negative feedback role in cAMP signaling-induced thermogenesis.Figure 8The protein levels of QKI in BAT and ingWAT during cold stimulation (4 °C) and the quantified protein levels. (n=3 biological replicates) The relative luminescence of a QKI promoter reporter under cAMP (Forskolin and IBMX) stimulus. (n=3 biological replicates) The effect of transcriptional factors on the QKI promoter, assessed by luciferase activity assays. (n=3 biological replicates) The relative mRNA levels of genes (UCP1, PGC1α, Dio2) in differentiated MEFs transfected with ShScramble or ShQKI lentivirus, following cAMP (Forskolin and IBMX) stimulation. (n=3 biological replicates)
a) PCF trypanosomes (5 × 107 cells) were added to the reaction buffer (2.f3(a) PCFtrypanosomes (5 × 107 cells) were added to the reaction buffer (2.45 ml) containing 2 mM succinate, and 5 μM safranine, and the reaction was started with digitonin (50 μM). ADP (10 μM), oligomycin (Oligo, 2 μg ml−1), CaCl2 (40 μM), EGTA (200 μM) and FCCP (10 μM) were added where indicated. (b) Changes in safranine fluorescence after addition of ADP or Ca2+ to −Tet and +Tet PCFtrypanosomes (means±s.d., n=3, **P0.01, Student's t-test). (c) BSFtrypanosomes (2 × 108 cells) were added to the reaction buffer (2.45 ml) containing EGTA (20 μM), ATP (1 mM), sodium orthovanadate (500 μM) and 12.5 μM safranine. The reaction was started with digitonin (40 μM). CaCl2 (50 μM), EGTA (200 μM) and FCCP (10 μM) were added where indicated. (d,e) Changes in safranine fluorescence after addition of Ca2+ (d) or FCCP (e) to −Tet and +Tet BSFtrypanosomes (means±s.d., n=3, **P0.01, Student's t-test).
T cell-intrinsic defect in the development of Pou2af1-/- Tfh cells.Figure 4Tfh cell development in the spleen (SPL), mesenteric lymph nodes (MLN) and Peyer's patches (PP) of WT:Pou2af1-/- mixed bone marrow chimeras seven days after immunization with SRBC. (A) Total numbers of Pou2af1+/+ and Pou2af1-/- CD4+ T cells and B220+ B cells per million leukocytes in the BM chimeras. Tfh cell development in the spleen (SPL), mesenteric lymph nodes (MLN) and Peyer's patches (PP) of WT:Pou2af1-/- mixed bone marrow chimeras seven days after immunization with SRBC. (B) Frequencies of Pou2af1+/+ and Pou2af1-/- B220+FAS+GL7+ GC B cells. Tfh cell development in the spleen (SPL), mesenteric lymph nodes (MLN) and Peyer's patches (PP) of WT:Pou2af1-/- mixed bone marrow chimeras seven days after immunization with SRBC. (C) Frequencies of Pou2af1+/+ and Pou2af1-/- Tfh cells as identified by the coexpression of CXCR5 and ICOS (CXCR5hiICOS+), CXCR5 and PD1 (CXCR5hiPD1+), or CXCR5 and BTLA (CXCR5hiBTLAhi) among CD4+ T cells. The graphs in (A-C) show combined data from two out of four independent experiments (n=11). (D) Tfh cell development in CD4-/-mice reconstituted with Pou2af1+/- or Pou2af1-/-CD4+CD62L+OTII+T cells. Mice were analyzed seven days after immunization with OVA in alum for the presence of CXCR5hiICOS+, CXCR5hiPD1+ and CXCR5hiBTLAhiTfh cells. Data are derived from 2 independent experiments with 8 animals per group (mean ± SD). *, P < 0.05; **, P < 0.01; ***, P < 0.001; ****, P < 0.0001; unpaired Mann Whitney test.
Figure 2(A) Braf-/-;ERTmHRasG12V MEFs were reconstituted with HA-tagged hBRAF constructs or empty vector (EV). Infected cells were either treated with 4-HT (1µM) to induce oncogenic Ras activation or with ethanol (OH) as a control. (B) Quantifications of pMEK (left) and pERK (right) normed to WT level. n = 3, mean + SEM, t-test, ** p < 0.01. (C) The AVKA mutation has no discernible influence on Ras-induced paradoxical ERK activation triggered by the D594A mutation. Experimental set-up as in (A), shown are lysates from 4-HT treated MEFs. (D) Quantification of pMEK and pERK levels normed to HA expression. n = 3, mean + SEM, t-test, ** p < 0.01. (E) Top: Braf-/-;ERTmHRasG12V MEFs were reconstituted with the indicated B-Raf constructs. Following induction of Ras signaling, HA-B-Raf proteins were purified using anti-HA antibodies and subject to Western blotting to analyze immunoprecipitation of Raf-1. Bottom: Quantification of co-immunoprecipitated Raf-1 normed to HA-B-Raf levels. n = 3, mean + SEM, t-test, * p < 0.05.
Figure 5(A) Representative confocal images of the left diaphragm at E18.5 labeled with α-bungarotoxin (red) and anti-peripherin antibody (green) to visualize AChRs and the motor axon, respectively. The endplates of Ctgf-/- diaphragm were smaller (lower left panel) than those of the wild-type diaphragm (upper left panel). In the Ctgf-/- diaphragm, 10.0 ± 3.2% (mean and SD, n = 105 in 5 embryos) of peripherin-positive axons passed through the AChR-positive areas. In contrast, in the wild-type diaphragm, 2.0 ± 1.4% (mean and SD, n = 102 in 5 embryos) of peripherin-positive axons passed through the AChR-positive areas. Quantification was performed in a blinded manner. Scale bar = 5 µm. (B) Representative confocal images of the left diaphragm at E18.5 labeled with α-bungarotoxin (red) and anti-synaptophysin antibody (green) to visualize AChRs and the nerve terminal, respectively. Synaptophysin signals mostly overlapped with α-bungarotoxin signals in the wild-type diaphragm, whereas synaptophysin signals extended into the axon in the Ctgf-/- diaphragm. Scale bar = 5 µm. (C-E) Blinded morphometric analysis of AChR signals (C), synaptophysin signals (D), and the ratio of synaptophysin signals not colocalized with AChR signals (E) of confocal images shown in (A) and (B). AChR areas (C), but not synaptophysin-positive areas (D), were decreased in Ctgf-/- mice at E18.5. (E) A large fraction of synaptophysin signalswere not colocalized with AChR signals in Ctgf-/- diaphragm. Mean and SD (n = 40-50 NMJs in 6 left diaphragms) are indicated. p-value < 0.05 by one-way ANOVA for (C and E), but not for (D). p < 0.05 by post-hoc Tukey test is indicated by a single letter representing each group. (F) Representative electron micrographs of the NMJs in the diaphragm of wild-type and Ctgf-/- mice at E18.5. In Ctgf-/- mice, synaptic vesicles are sparser and the number of mitochondria at the nerve terminals is reduced compared to those in wild-type mice. See Table 1 for morphometric analysis. Regions indicated by rectangles are enlarged in the insets. Arrowheads point to synaptic vesicles (SV). Mit, mitochondria. Blinded morphometric measurements are shown in Table 1. Scale bar = 500 nm. (G) Schematic showing binding of CTGF to the agrin/Lrp4/MuSK complex and induction of acetylcholine receptor (AChR) clustering at the neuromuscular junctions. The CT domain of CTGF binds to the 3rd β-propeller domain of LRP4 to enhances binding of LRP4 to MuSK, and facilitates agrin-mediated MuSK phosphorylation and AChR clustering.
Figure 1(A) Netrin-1 (NTN1) gene expression profiling from 6 adults control brains using microarray data from the Allen Human Brain Atlas. (B) Reporter gene expression in the midbrain (substantia nigra (SN) and ventral tegmental area (VTA)) of netrin-1+/lacZ+ adult (P60) mice incubated with S-Gal. (Scale bar, 2000 µm). Two coronal sections of the mice midbrain are shown from the more anterior is shown in the upper panel. (C) Netrin-1 protein localization in the SN of adult rat. (Scale bar, 200 µm). Upper panel, confocal image of the SN. Higher magnification of the SNpc (bottoms panels). Netrin-1 (red), Tyrosine hydroxylase (TH) (green). (D) Localization of netrin-1 protein in the adult rat striatum. (Scale bar, 600µm). Left panel, confocal image of the rat striatum. Netrin-1 (red), Dopamine transporter (DAT) (green). Right panels, higher magnification.
Fig.Figure 3A) Scheme of timeline analyses performed. B) Viral titers (viral genome copy VG per cell) determined by qPCR in cortical, hippocampal and rest of brain areas of Fmr1-KO mice treated with saline solution (Vehicle), AAVPHP.eB-∆N-DGKk (PHP.eB), AAVRh10-∆N-DGKk (Rh10) 8 weeks after injections. Data are mean ± SEM. Each dot represents an individual mouse. C) Immunoblots and quantification of ∆N-DGKk protein in lysates from brain areas of mice treated as in B. GAPDH was used as a loading control. Densitogram of ∆N-DGKk expression is presented as change relative to vehicle conditions. D) Representative coronal brain sections processed for detection of ∆N-DGKk using immunohistochemistry on Fmr1-KO mice treated with indicated treatment, 8 weeks post-injections, counter stained with eosin hematoxylin. Adjacent sections were immunolabelled with NeuN. 3 mice per genotype were processed. The sections shown are between Bregma levels -1.50 mm and -1.80 mm. Scale bar is 2 mm. Magnifications of regions of cortex (c), hippocampus (h), and striatum (s) are shown in side panels, scale bar 200 µm. E) Total phosphatidic acid (PA) level measure by mass spectrometry in cortex of WT mice treated with saline solution (WT-S) and Fmr1-KO mice treated with saline (Fmr1-S), AAVPHP.eB-∆N-DGKk (Fmr1-PHP.eB), AAVRh10-∆N-DGKk (Fmr1-Rh10) 8 weeks after injections. Data are expressed as mol % of total lipids and represented as median with interquartile range with minimum and maximum values. Statistics: one-way ANOVA and Tukey's multiple comparisons test, n=8 individual animals, except for WT-S and Fmr1-S n=11. **P < 0.01, ***P < 0.001. F) Total diacylglycerol (DAG) level in cortex measured as in E).
a) AMPK interacts with Ulk1.figf4(a) AMPK interacts with Ulk1. HEK293 cells were transfected with the various Flag-Ulk1 deletion mutants together with AMPK α/β/γ, Atg13 and FIP200. Flag-Ulk1 protein (indicated by white arrows) was immunoprecipitated and co-immunoprecipitation of AMPK α/β/γ, Atg13 and FIP200 were examined by western blots. (b) Deletion analysis of Ulk1 regions responsible for AMPK interaction. The indicated Flag-Ulk1 truncation mutants were immunoprecipitated from transfected HEK293 cells co-expressing AMPK complex (α/β/γ). Co-immunoprecipitation of AMPK subunits was determined by western blots. (c) Rheb inhibits the Ulk1-AMPK interaction. HA-AMPKα, Flag-Ulk1 and Myc-Rheb were co-transfected into HEK293 cells as indicated. Cells were treated with or without rapamycin (50 nM Rapa) for 1 h before lysis. Flag-Ulk1 was immunoprecipitated and co-immunoprecipitates of AMPKα were determined by western blot. (d) Rapamycin treatment enhances the interaction of endogenous Ulk1 and AMPK. Endogenous Ulk1 proteins were immunoprecipitated from either Ulk1 or AMPK wild-type and knockout (single-knockout; KO or double-knockout; DKO) MEFs. Treatment with 50 nM rapamycin for 1 h is indicated (Rapa). Co-immunoprecipitation of endogenous AMPKα protein was determined by western blot. The arrow indicates AMPKα protein. (e) Phosphorylation by mTORC1 inhibits the ability of Ulk1 to bind AMPK in vitro. CBP/SBP-Ulk1 was purified from transfected HEK293 cells by streptavidin beads and the Ulk1-bead complex was incubated with mTORC1, which was prepared by Raptor immunoprecipitation, in the presence of cold ATP, as indicated. The resulting Ulk1 complex was incubated with the cell lysates containing AMPK, then extensively washed. The Ulk1 and associated AMPKα were detected by western blot. Uncropped images of blots are shown in Supplementary Fig. S5.
Orthotopic medulloblastoma xenograft modelsRepresentative images (low and high magnification) of HE (upper panel) and Ki67 immunohistochemical staining (lower panel) of a human Daoy MB cell‐derived orthotopic tumor in NOD/SCID mice cerebella after i.Figure 7A Representative images (low and high magnification) of HE (upper panel) and Ki67immunohistochemistry staining (lower panel) of a human Daoy MB cell‐derived orthotopic tumor in NOD/SCIDmicecerebella after i.p. injections of GlaB. Scale bars represent 500 or 200 μm for HE staining, and 150 μm or 50 μm for Ki67 staining.B Representative tumor average volumes at the end of treatment. Error bars indicate SD. *P 0.05.C Quantification of Ki67 staining from immunohistochemistry shown in (A). Error bars indicate SD. *P 0.05.
Ret localizes to Src‐positive autophagosomes in FAK‐deficient SCC cells.Figure 2Ret localizes to Src‐positive autophagosomes in FAK‐deficient SCC cells. Cells were fixed and stained with either (A) anti‐Ret (green) and anti‐PY416 Src (red) or (B) anti‐PY416 Src (red) and anti‐LC3B (green). Merged and zoomed images are shown. Solid arrows indicate co‐localization at adhesions, while broken arrows show co‐localization in intracellular puncta. (C) Cells were transfected with scrambled, Atg5 or Atg7 siRNA, trypsinized and allowed to readhere before immunoblotting with anti‐Atg5, anti‐Atg7 and anti‐actin (right panels). Cells were fixed and stained with anti‐Ret (green), anti‐paxillin (red) and DAPI (blue). Merged images are shown. Solid arrows indicate co‐localization between Ret and paxillin at adhesions, while broken arrows indicate its absence in puncta. (D) Quantification of percentage of cells that contained Ret in intracellular puncta is shown. Data are presented as mean±s.d. and the significance calculated using a Student's t‐test (n=3). (E) Cells, either untreated or treated with chloroquine for 24 h, were fixed and stained with anti‐Ret (green) and DAPI (blue). Scale bars, 20 μM. DAPI, 4,6‐diamidino‐2‐phenylindole; FAK, focal adhesion kinase; Ret, rearranged during transfection; SCC, squamous cell carcinoma; siRNA, short interfering RNA.