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. 2019 Jan 23;10:397. doi: 10.1038/s41467-019-08301-2

Fig. 2.

Fig. 2

Validation of additional drivers in WB1P mice using germline and somatic engineering. a Overview of the germline and somatic mouse models for mammary gland-specific Myc overexpression in mice with conditional Brca1 and Trp53 alleles. b Kaplan–Meier curves showing mammary tumor-specific survival for the different genotypes. WapCre;Brca1F/F;Trp53F/F;Col1a1invCAG-Myc-IRES-Luc/+ (WB1P-Myc) females showed a reduced mammary tumor-specific survival compared to WB1P littermates (97 days vs. 198 days; ****P < 0.0001 by Mantel-Cox test). c Kaplan–Meier curves showing mammary tumor-specific survival for the different non-germline models. Brca1F/F;Trp53F/F;Col1a1invCAG-Myc-IRES-Luc/+ (B1P-Myc) females injected with Lenti-Cre, B1P females injected with Lenti-MycP2ACre and WB1P females injected with Lenti-Myc showed a reduced mammary tumor-specific survival compared to B1P female mice injected with Lenti-Cre (respectively 126, 92, and 61 days after injection vs. 238 days after injection; ****P < 0.0001 by Mantel-Cox test). d Representative hematoxylin and eosin (HE) staining and immunohistochemical detection of E-cadherin, vimentin, ER and PR in tumors from WB1P-Myc females and in tumors from Lenti-Cre injected B1P-Myc mice, Lenti-MycP2ACre injected B1P mice and Lenti-Myc injected WB1P mice. Bar, 400 µm. e Overview of the intraductal injections performed in WapCre;Brca1F/F;Trp53F/F;Col1a1invCAG-Cas9-IRES-Luc/+ (WB1P-Cas9) females with high-titer lentiviruses encoding Myc and either a non-targeting (NT) sgRNA (Lenti-sgNT-Myc), a sgRNA targeting exon 2 of Rb1 (Lenti-sgRb1-Myc) or a sgRNA targeting exon 7 of Pten. f Kaplan–Meier curves showing mammary tumor-specific survival for the different models. WB1P-Cas9 females injected with Lenti-sgPten-Myc and Lenti-sgRb1-Myc showed a reduced mammary tumor-specific survival compared to WB1P-Cas9 female mice injected with Lenti-sgNT-Myc (respectively 30 and 52 days after injection vs. 70 days after injection, ****P < 0.0001 and ***P < 0.001 by Mantel-Cox test). g Boxplots depicting the fraction of modified Rb1 and Pten alleles in tumors from WB1P-Cas9 mice injected with Lenti-sgNT-Myc, Lenti-sgRb1-Myc and Lenti-sgPten-Myc. Boxes extend from the third (Q3) to the first (Q1) quartile (interquartile range, IQR), with the line at the median; whiskers extend to Q3 + 1.5 × IQR and to Q1 − 1.5 × IQR