EMBO/SourceData huggingface dataset:
Figure 4A. Localization of endogenous YAP and NLK in low (LD) or high density (HD) MCF10A (upper panel) or NIH3T3 cells (bottom panel) was examined by indirect immunofluorescence. Nuclei were stained with DAPI. Scale bars: 20 μm.B. Level of NLK decreases in a cell density-dependent manner. Lysates from low (LD) and high density (HD) of MCF10A, HEK293T, and NIH3T3 cells were immunoblotted with antibodies indicated in the figure.C. Level of endogenous NLK mRNA is unaffected, whereas the expression of YAP target genes was reduced, at high cell density. Quantitative real-time PCR analyses for expression of AMOTL2, CTGF, CYR61, and NLK in low (LD) and high density (HD) NIH3T3 cells were performed. Quantification of AMOTL2, CTGF, CYR61, and NLK mRNA was normalized with the level of Gapdh. Data represent average values from a representative of multiple experiments performed in triplicate. Error bars indicate standard deviations of triplicate measurements. Data are presented as mean ± sem. *P < 0.05 and ***P < 0.005. Student t-test was used for statistical analysis.
Figure 1Immunoblot analysis of ADAR1 p110, ADAR1 p150 and ADAR2 expression in various organs isolated from wild-type (WT) mice. The expression of GAPDH is shown as a reference.The relative expression of ADAR1 p150 mRNA (B) and total ADAR1 mRNA (C) in sorted DN, DP, 4SP and 8SP thymocytes isolated from WT mice. The relative expression of ADAR1 p150 mRNA (B) and total ADAR1 mRNA (C) were normalized to the level of expression in DN thymocytes (DN values set to 1). Values represent the relative gene expression normalized to GAPDH mRNA and are displayed as the mean ± SEM (n = 5; Mann-Whitney U-test, *p < 0.05, **p < 0.01).The relative expression of type I interferon-stimulated genes (ISGs) in sorted DN, DP, 4SP and 8SP thymocytes isolated from WT mice. Values represent the relative gene expression normalized to GAPDH mRNA and are displayed as the mean ± SEM (n = 3; Mann-Whitney U-test, *p < 0.05). The relative expression of ISGs was normalized against the level of expression in DN thymocytes (DN values set to 1).
Figure 2Total number of thymocytes in wild-type (WT) and CD4+ cell-specific Adar1 knockout (Cd4cre A1fl/fl) mice.Thymocytes isolated from WT and Cd4cre A1fl/fl mice were stained with anti-CD4 and anti-CD8 antibodies and analyzed by flow cytometry. Representative images are shown (B).The percentages of DN, DP, 4SP, and 8SP thymocytes were compared between WT and Cd4cre A1fl/fl mice (C).Thymocytes isolated from WT and Cd4cre A1fl/fl mice were stained with anti-CD4, anti-CD8 and anti-TCRβ antibodies and were gated by the high expression of TCRβ (TCRβhigh). Representative images are shown (D).The percentages of DN, DP, 4SP, and 8SP thymocytes were compared between WT and Cd4cre A1fl/fl mice (E).Thymocytes isolated from WT and Cd4cre A1fl/fl mice were stained with anti-CD4, anti-CD8, anti-CD69 and anti-MHC-I antibodies and were gated on 4SP thymocytes. Representative images are shown (upper panel). The percentages of CD69+MHC-I- (SM), CD69+MHC-I+ (M1), and CD69-MHC-I- (M2) thymocytes were compared between WT and Cd4cre A1fl/fl mice (lower panel).Thymocytes isolated from WT and Cd4cre A1fl/fl mice were stained with antibodies against CD5 and analyzed by flow cytometry. Representative flow cytometric images for DP and 4SP thymocytes are shown (upper panel). The percentages of CD5- DP and 4SP thymocytes were compared between WT and Cd4cre A1fl/fl mice (lower panel).Thymocytes isolated from WT and Cd4cre A1fl/fl mice were stained with anti-CD4, anti-CD8, anti-CD25 and anti-Foxp3 antibodies and were gated on 4SP thymocytes. Representative images are shown (upper panel). The percentages of CD25+Foxp3+ 4SP thymocytes (thymic Treg cells) were compared between WT and Cd4cre A1fl/fl mice (lower panel).
Figure 3CD4+ cell-specific Adar1 knockout (Cd4cre A1fl/fl) mice were crossed with HY-TCR+ mice to generate Cd4cre A1fl/fl HY-TCR+ mice. Thymocytes isolated from male (A) and female (B) HY-TCR+ or Cd4cre A1fl/fl HY-TCR+ mice were stained with anti-CD4 and anti-CD8 antibodies and analyzed by flow cytometry. Representative images are shown (left panels). The absolute number of DP and 8SP thymocytes were compared between HY-TCR+ and Cd4cre A1fl/fl HY-TCR+ mice (right panels).Thymocytes isolated from WT and Cd4cre A1fl/fl mice were labeled with Cell Proliferation Dye and then stimulated with plate-bound anti-CD3 and anti-CD28 antibodies for 4 days. Apoptotic (Annexin V+) and proliferating thymocytes (reduced intensity of Proliferation Dye) were determined by flow cytometry. Representative flow cytometric images are shown (left panel). The percentages of either Annexin V+ or Annexin V- proliferating thymocytes were compared between WT (n = 5) and Cd4cre A1fl/fl (n = 4) mice (right panel).The relative expression of anti-apoptotic genes in sorted 4SP thymocytes isolated from WT and Cd4cre A1fl/fl mice. Values represent the relative gene expression normalized to Actinβ mRNA and are displayed as the mean ± SEM (n = 3; Mann-Whitney U-test, *p < 0.05, N.S.; not significant). The mean value for the relative expression of each anti-apoptotic gene in WT 4SP thymocytes was set as one.Immunoblot analysis of total and phosphorylated ZAP70 and PLCγ1 expression in anti-CD3-stimulated thymocytes isolated from WT and Cd4cre A1fl/fl mice. The expression of GAPDH is shown as a reference. Representative images are shown (left panel). The band intensity of p-ZAP70 and p-PLCγ1 was normalized to that of total ZAP70 and PLCγ1, respectively
Figure 4Incidence of spontaneous colitis observed in wild-type (WT) and CD4+ cell-specific Adar1 knockout (Cd4cre A1fl/fl) mice (n = 11 for each group;Representative images of HE staining of the colon dissected from a WT and Cd4cre A1fl/fl mouse. Scale bar, 200 μm.Lymphocytes isolated from the colonic lamina propria of WT and Cd4cre A1fl/fl mice were stained with anti-IFNγ, anti-IL17 or anti-Foxp3 antibodies together with anti-CD4 antibodies and analyzed by flow cytometry. Representative images are shown (left panel). The absolute number of IFNγ-, IL17-, or Foxp3-expressing CD4+ T cells were compared between WT and Cd4cre A1fl/fl mice (right panel).Splenocytes isolated from WT and Cd4cre A1fl/fl mice were stained with anti-IFNγ and anti-IL17 together with anti-CD4 antibodies and were gated on CD4+ cells. Representative flow cytometry images are shown (upper panel). The percentages of IFNγ- and IL17-secreting CD4+ T cells were compared between WT and Cd4cre A1fl/fl mice (lower panel).Splenocytes isolated from WT and Cd4cre A1fl/fl mice were stained with anti-Foxp3 together with anti-CD4 antibodies and were gated on CD4+ cells. Representative flow cytometry images are shown (upper panel). The percentages of Foxp3-expressing CD4+ T cells were compared between WT and Cd4cre A1fl/fl mice (lower panel).Effector T (Teff) cells isolated from the spleen of a WT mouse were stimulated with soluble anti-CD3 (5 μg/ml) in the presence of mitomycin C-treated splenocytes and were cultured with regulatory T (Treg) cells isolated from WT and Cd4cre A1fl/fl mice at the indicated ratios. After 72 h, the proliferative activity was measured. Values are displayed as the mean ± SEM (n = 3 for each group; Mann-Whitney U-test, N.S.; not significant). The mean value for the suppression of proliferative activity of Teff cells in a condition without Treg cells was set as 0%.
Figure 5RNA editing in the 3′UTR (C) and intronic region (D) of each gene indicated in the figures with their chromosomal location was validated by direct Sanger sequencing and the frequency of editing was compared among wild-type (WT) DP, WT 4SP thymocytes, and 4SP thymocytes isolated from CD4+ cell-specific Adar1 knockout (Cd4cre A1fl/fl) mice.The relative expression of each interferon-stimulated gene (ISG) indicated in the figure in sorted DP and 4SP thymocytes isolated from WT and Cd4cre A1fl/fl mice. Values represent the relative gene expression normalized to GAPDH mRNA and are displayed as the mean ± SEM (n = 3; Mann-Whitney U-test, *p < 0.05). The mean value for the relative expression of each ISG in WT DP thymocytes was set as one.Immunoblot analysis of total and phosphorylated STAT1 expression in thymocytes isolated from WT and Cd4cre A1fl/fl mice (n = 2 for each group). The expression of GAPDH is shown as a reference.
Figure 6CD4+ cell-specific Adar1 knockout (Cd4cre A1fl/fl) mice were crossed with MDA5 knockout (Ifih1-/-) mice to generate Cd4cre A1fl/fl Ifih1-/- mice. Thymocytes isolated from Ifih1-/- and Cd4cre A1fl/fl Ifih1-/- mice were stained with anti-CD4, anti-CD8 and anti-TCRβ antibodies and analyzed by flow cytometry. Representative images are shown (left panel). The percentage of DN, DP, 4SP and 8SP thymocytes were compared among Ifih1-/- (n = 4), Cd4cre A1fl/fl Ifih1-/- (n = 5) and Cd4cre A1fl/fl (n = 7) mice (right panel). The same data shown in Fig 2C was used for Cd4cre A1fl/fl mice.The relative expression of each interferon-stimulated gene (ISG) indicated in the figure in sorted 4SP thymocytes isolated from Ifih1-/- and Cd4cre A1fl/fl Ifih1-/- mice. Values represent the relative gene expression normalized to GAPDH mRNA and are displayed as the mean ± SEM (n = 3; Mann-Whitney U-test, *p < 0.05). The mean value for the relative expression of each ISG in Ifih1-/- 4SP thymocytes was set as one.Immunoblot analysis of total and phosphorylated ZAP70 and PLCγ1 expression in anti-CD3-stimulated thymocytes isolated from Ifih1-/- and Cd4cre A1fl/fl Ifih1-/- mice. The expression of GAPDH is shown as a reference. Representative images are shown (left panel). The band intensity of p-ZAP70 and p-PLCγ1 was normalized to that of total ZAP70 and PLCγ1, respectively and displayed as the mean ± SEM (n = 3; Mann-Whitney U-test, N.S.; not significant) (right panel) by setting the mean value of stimulated Ifih1-/- samples at 60 sec as 1.Thymocytes isolated from Ifih1-/- and Cd4cre A1fl/fl Ifih1-/- mice were stimulated with plate-bound anti-CD3 (5 μg/ml) and anti-CD28 (1 μg/ml) antibodies for 72 h and the proliferative activity was measured. Values are displayed as the mean ± SEM (n = 3 for each group; Mann-Whitney U-test, *p < 0.05). The mean value for the activity of Ifih1-/- thymocytes in an unstimulated condition was set as one. For comparative analysis, the same data shown in Appendix Fig S1B was used for Cd4cre A1fl/fl mice.Thymocytes isolated from Ifih1-/- and Cd4cre A1fl/fl Ifih1-/- mice were stained with anti-CD4, anti-CD8, anti-CD69 and anti-MHC-I antibodies and were gated on 4SP thymocytes. Representative images are shown (upper panel). The percentages of CD69+MHC-I- (SM), CD69+MHC-I+ (M1), and CD69-MHC-I- (M2) thymocytes were compared among Ifih1-/- (n = 5), Cd4cre A1fl/fl Ifih1-/- (n = 3) and Cd4cre A1fl/fl (n = 3) mice (lower panel). The same data shown in Fig 2F was used for Cd4cre A1fl/fl mice.Thymocytes isolated from Ifih1-/- and Cd4cre A1fl/fl Ifih1-/- mice were stained with anti-CD4, anti-CD8, anti-CD25 and anti-Foxp3 antibodies and were gated on 4SP thymocytes. Representative images are shown (upper panel). The percentages of CD25+Foxp3+ 4SP thymocytes (thymic Treg cells) were compared among Ifih1-/-, Cd4cre A1fl/fl Ifih1-/- and Cd4cre A1fl/fl mice (lower panel). The same data shown in Fig 2H was used for Cd4cre A1fl/fl mice.
Figure 7Splenocytes isolated from Ifih1-/- and Cd4cre A1fl/fl Ifih1-/- mice were stained with anti-IFNγ and anti-IL17 together with anti-CD4 antibodies and were gated on CD4+ cells. Representative flow cytometry images are shown (left panel). The percentages of IFNγ- and IL17-secreting CD4+ T cells were compared among Ifih1-/- (n = 4), Cd4cre A1fl/fl Ifih1-/- (n = 5) and Cd4cre A1fl/fl mice (n = 6) (right panel). The same data shown in Fig 4E was used for Cd4cre A1fl/fl mice.No incidence of spontaneous colitis observed in Ifih1-/- (n = 5) and Cd4cre A1fl/fl Ifih1-/- (n = 11) mice. For side-by-side comparison with Cd4cre A1fl/fl miceRepresentative images of HE staining of colon dissected from an Ifih1-/- and a Cd4cre A1fl/fl Ifih1-/- mouse. Scale bar, 200 μm.
Figure 1A Indicated tail-anchored (TA) proteins were in vitro translated in rabbit reticulocyte lysate (RRL) using RNAs containing a stop codon. Translations were carried out in the presence of 2 μM HisTrx or HisTrx-SGTA (HT-SGTA), followed by incubation with HisPur Cobalt resin Bound proteins were eluted at high imidazole concentration, samples resolved by SDS-PAGE and results visualised by phosphorimaging. Sec61β 3R carries three Arg residues within Sec61β transmembrane domain (TMD) which abolish its hydrophobic character and was used as a negative control for SGTA binding. A schematic representation of a TA-protein is also shown. Open circles indicate TA-proteins selectively bound by HisTrx-SGTA. RAMP4 - stress-associated endoplasmic reticulum protein 1; Syb2 - synaptobrevin 2; Synt5 - syntaxin 5. B As for (A) but total translation products (input) were resolved by SDS-PAGE and results visualised by phosphorimaging. When total products are analysed high amounts of haemoglobin in the RRL distort the migration of Sec61β and its variant. RNAs coding for C99 variants and containing a stop codon introduced either after the complete coding sequence or before the predicted TMD were used. E As for (D) but total translation products were subjected to immunoprecipation with either anti-C99 antibody (for the full-length variants) or with anti-β-amyloid antibody (for products lacking the TMD). A filled square indicates inefficiently translated APP-C99-TMD immunoprecipitated with anti-β-amyloid antibody.
Figure 2A Full-length polypeptides were translated in the presence of 2 μM HisTrx or HisTrx-SGTA using RNAs lacking a stop codon and either stabilised at the ribosome with cycloheximide (CHX) or released with puromycin (puro). Reactions were incubated with HisPur Cobalt resin, bound proteins eluted at high imidazole concentration, resolved by SDS-PAGE and visualised by phosphorimaging Filled circles indicate slower migrating species of radiolabelled products selectively enriched in CHX-treated samples.total translation reactions were treated with RNaseA and immunoprecipitated with anti-C99 antibodyFollowing in vitro translation of the indicated proteins in the presence of 2 μM HisTrx-SGTA and recovery on HisPur Cobalt resin the eluted fractions were subjected to RNaseA treatment (C) -tRNA" and "+ tRNA" indicate tRNA-lacking and tRNA-bound protein species, respectively.D Following in vitro translation of the indicated proteins in the presence of 2 μM HisTrx-SGTA and recovery on HisPur Cobalt resin precipitation with hexadecyltrimethylammonium bromide (CTAB) (D) ;-tRNA" and "+ tRNA" indicate tRNA-lacking and tRNA-bound protein species, respectively.
Figure 3B Variants of PPLssKO-C99 were translated in the presence of 2 μM HisTrx-SGTA using templates lacking a stop codon and terminating either before ("-TMD") or at indicated amino acid distance after the TMD. Pull-down with HisPur Cobalt resin was carried out as described in Materials and Methods, eluted material resolved by SDS-PAGE and results visualised by phosphorimaging. tRNA-bound species were verified by treating PPLssKO-C99 variant terminating immediately after the TMD (TMD + 0) with RNaseA (lane 9).translation reactions were carried out using RNAs coding for the indicated TA-proteins and lacking a stop codon. Sec61β 3R was used as a control protein without a functional TMD. Filled circles indicate tRNA-bound TA-protein species recovered with HisTrx-SGTA.D Rabbit reticulocyte lysate was left untreated ("untreat."), incubated with control immobilised antibodies ("contr. depl.") or immunodepleted of Hbs1L, a factor that together with Pelota and ABCE1 [4], mediates splitting of ribosomes stalled on truncated mRNAs (see diagram). These lysates were used to translate FLAG-tagged Sec61β from an mRNA lacking a stop codon in the presence of 2 μM HisTrx or HisTrx-SGTA and samples were processed as described for (B).E tRNA-bound species of FLAG-tagged Sec61β from experiment shown in panel (D) were quantified and expressed relative to the value obtained for the control-depleted RRL. Shown is the mean with standard error of mean for n=4 biological replicates. Statistical significance was calculated using unpaired t test with Welch's correction. ns - not significant.
Figure 5A, B PPL-C99-TMD (A) and PPL-C99FL (B) were in vitro translated in RRL from mRNAs lacking a stop codon in the presence of 2 μM HisTrx or HisTrx-SGTA and ε-TDBA-Lys-tRNA analogue. Reactions were irradiated with the UV light to induce photo-cross-linking, RNCs isolated and adducts immunoprecipitated with mouse anti-SRP54, mouse anti-SGTA or a control antibody as described in Materials and Methods. Samples were resolved by SDS-PAGE and results visualised by phosphorimaging. C-terminal 40 amino acid residues located in the ribosomal exit tunnel are indicated. "x SRP54" and "x HisTrx-SGTA" indicate cross-linking adducts between the translated nascent chain and endogenous SRP54 or recombinant HisTrx-SGTA, respectively. Arrows indicate unmodified translation products.C PPL-C99FL variants lacking a stop codon and carrying the indicated Lys to Arg substitutions were in vitro translated in the presence of 2 μM HisTrx-SGTA. Reactions were processed using chicken anti-SGTA antibody for immunoprecipitation of SGTA adducts. D Cross-linking adducts between ribosome-stalled PPL-C99FL lysine mutants and recombinant HisTrx-SGTA shown in panel (C) were quantified, any differences in translation efficiency accounted for and cross-linking efficiency expressed relative to the wild-type (WT) protein. Shown is the mean with standard error of mean for n=3 biological replicates. Statistical significance was calculated using unpaired t test with Welch's correction.
Figure 6A, B PPL-C99FL lacking a stop codon was in vitro translated in RRL in the presence of canine pancreatic microsomes or buffer control in reactions supplemented with ε-TDBA-Lys-tRNA analogue. Reactions were carried out in the presence (A) or absence (B) of 2 μM HisTrx-SGTA. Samples were subjected to UV light-induced photo-cross-linking and processed as described for Fig 5. "x SRP54" and "x HisTrx-SGTA" indicate cross-linking adducts between the translated nascent chain and endogenous SRP54 or recombinant HisTrx-SGTA, respectively, whilst "endo. SGTA" indicates cross-linking adducts with endogenous SGTA. Cross-linking products between stalled PPL-C99FL and SGTA are also indicated with arrowheads, whilst arrows indicate unmodified translation products.C, D chemical cross-linking using DSS reagent was carried out. E DSS-mediated HisTrx-SGTA cross-linking efficiency to PPL-C99FL in the absence or presence of ER-derived microsomes was quantified. For each repeat, intensity of the cross-linked SGTA adduct in the absence of microsomes was set as 100%. Shown is the mean with standard error of mean for n=3 biological replicates. Statistical significance was calculated using unpaired t test with Welch's correction.
Figure 7A Indicated precursor proteins were translated in vitro using RRL supplemented with 20 μM HA-tagged ubiquitin and 2 μM of either HisTrx or HisTrx-SGTA. RNCs were isolated, ubiquitinated nascent chains recovered using anti-HA agarose, samples resolved by SDS-PAGE and analysed by phosphorimaging. Ubiquitinated precursor protein species were assigned based on SDS-PAGE electrophoretic mobility and are indicated in red. A schematic diagram of the proteins used is shown and the ~40 residues of the nascent chain located in the ribosomal exit tunnel are indicated. "ss" - signal sequence, "TMD" - transmembrane domain.B Individual, clearly resolved ubiquitinated species of the indicated proteins (labelled 1 to 4) were quantified and their intensity in HisTrx-SGTA containing samples shown relative to samples supplemented with HisTrx control protein. Shown is the mean with standard error of mean for n=3 biological replicates. Statistical significance was calculated using unpaired t test with Welch's correction. ns - not significant.
Figure 1G Verify the mobility of GFP (control) mRNA and GFP-MdCAX3 mRNA by RT-PCR in Mx leaf, stem, and root. The recombinant vectors (F) were transformed into A. tumefaciens GV3101 and introduced into Mx leaves by vacuum infiltration.H GFP fluorescence image of the Mx roots under different treatment. Nuclei were labeled using DAPI. Scale Bar: 100 μm.
Figure 3H Ratio (488/440) image of BCECF fluorescence in the roots of MdCAX3-suppressed in leaves Md/Mx. Scale bars: 100 μm.I Rhizosphere acidification of MdCAX3-suppressed in leaves Md/Mx. Bromocresol purple was used as a pH indicator for visualization. Scale bars: 1 cm.
Figure 4F GUS staining in N. benthamiana leaves after transient co-expression of pro35S::GFP with proMxCXIP1:GUS or proMbCXIP1:GUS, and co-expression with pBI101:GUS as a control.G Interaction between MdCXIP1 and MdCAX3 tested by yeast two-hybrid (Y2H) assays. A dilution series of NMY51 yeast cells co-expressing MdCXIP1 and MdCAX3 cultured on SD/II and SDIV screening media. pPBT3-N (empty vector) co-expressed with MdCXIP1 was used as a negative control. X-gal was used in SD/-Trp/-Leu/-His/-Ade screening medium to further test for possible interactions.I Interaction between MdCXIP1 and the MdCAX3 N-terminal autoinhibitory domain in an in vitro pull-down assay. The His-MdCXIP1, GST and GST-N-MdCAX3 fusion proteins were expressed in the Escherichia coli BL21 strain, and the GST protein alone was used as a negative control. '+' indicates presence and "−" indicates absence. IB, immunoblot.
Figure 5C Fluorescence ratio (488/440 nm excitations) of BCECF fluorescence in the roots of MdCAX3 and MdCXIP1 co-overexpressing Mb. The central band represents the median and the box ranges showing the interquartile range and covers the central 50% of the data. The whiskers showing the minimum and maximum of the data. Three biological replicates; 3 roots were quantified for each replicate. Asterisks indicate statistically significant differences (***, P < 0.001; ANOVA, Tukey correction).D Ratio (488/440) image of BCECF fluorescence in MdCAX3 and MdCXIP1 co-overexpressing Mb. Scale Bar: 100 μm. E Rhizosphere acidification in MdCAX3 and MdCXIP1 co-overexpressing Mb. Bromocresol purple was used as a pH indicator for visualization. Scale Bar: 1 cm.
Figure 6D Cellular localization of Zn2+ (blue) in Mx and MdCAX3-suppressed Mx roots under Fe deficient conditions. Arrowhead indicates the cytoplasm. Scale Bars: 20 μm. E Fluorescence intensity detection at the position indicated by the long and narrow arrow in the Fig 6D.
Figure 1D Volcano plot showing differentially expressed genes (adj. P.Val < 0.05) between ethanol- and R5020-treated mouse mammary organoids, n=3. Genes with log2(FC) > 2 are highlighted in red, genes with log2FC < -2 in blue. Names of genes with -log10 (adj.P.Val) > 10 and abs(log2(FC)) > 2 are indicated.H, I Bar graphs showing relative Rankl and Wnt4 transcript levels normalized to 36B4 expression in C57Bl6-derived mammary organoids treated for 6 hours with R5020 (H) or LNG (I) and either 10 μM or 100 μM enzalutamide, n=3 independent experiments.
Figure 2G Scatter plot showing the genes which are commonly altered upon R5020 stimulation (adj. P-value < 0.05) in both mouse and human organoids relative to their CTRL samples. Color scale as a function of the averaged human and mouse logFC values. The red dashed lines represent an adj. P-value threshold of 0.001.
Figure 3D Stereo micrographs of whole mounted mammary glands 12 weeks after injection of HBECs. Scale bar, 2 mm. Inset, arrows point to mouse ducts distended by the presence of HBECs. Scale bar, 0.8 mm.I Representative co-IF micrographs of a cross-sectioned "humanized" mouse milk duct 5 months after intraductal injection for AR, ERα and PR, in red, and human E-CAD, in green. Scale bar, 50 μm.K Bar graphs showing the threshold cycles of semi quantitative RT-PCR with human-specific primers on RNA from virgin (n=4) and pregnant (n=3) mice xenografted with human cells.