PMID- 18463397 OWN - NLM STAT- MEDLINE DCOM- 20080624 LR - 20211020 IS - 1538-7445 (Electronic) IS - 0008-5472 (Print) IS - 0008-5472 (Linking) VI - 68 IP - 10 DP - 2008 May 15 TI - Hoxb7 inhibits transgenic HER-2/neu-induced mouse mammary tumor onset but promotes progression and lung metastasis. PG - 3637-44 LID - 10.1158/0008-5472.CAN-07-2926 [doi] AB - Our previous studies have shown that HOXB7 mRNA is overexpressed in approximately 50% of invasive breast carcinomas and promotes tumor progression in breast cancer cells grown as xenografts in mice. In silico analysis of published microarray data showed that high levels of HOXB7 predict a poor outcome in HER-2-positive (P = 0.046), but not in HER-2-negative breast cancers (P = 0.94). To study the function of HOXB7 in vivo in the context of HER-2 overexpression, we generated mouse mammary tumor virus (MMTV)-Hoxb7 transgenic mice, and then crossed them with MMTV-HER-2/neu transgenic mice. In the mice carrying both Hoxb7 and HER-2/neu transgenes, Hoxb7 plays a dual role in mammary tumorigenesis. In double transgenic mice, overexpression of Hoxb7 delayed tumor onset and lowered tumor multiplicity. However, consistent with the clinical data, once the tumors appeared, their growth was faster and metastasis to the lungs occurred at a higher frequency. Our data show, for the first time, that deregulated expression of Hoxb7 in mammary tumor cells can significantly modulate HER-2/neu-oncogene induced tumorigenesis in vivo. FAU - Chen, Hexin AU - Chen H AD - The Breast Cancer Program, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, Maryland, USA. FAU - Lee, Ji Shin AU - Lee JS FAU - Liang, Xiaohui AU - Liang X FAU - Zhang, Huiping AU - Zhang H FAU - Zhu, Tao AU - Zhu T FAU - Zhang, Zhe AU - Zhang Z FAU - Taylor, M Evangeline AU - Taylor ME FAU - Zahnow, Cynthia AU - Zahnow C FAU - Feigenbaum, Lionel AU - Feigenbaum L FAU - Rein, Alan AU - Rein A FAU - Sukumar, Saraswati AU - Sukumar S LA - eng GR - P50 CA088843/CA/NCI NIH HHS/United States GR - P50 CA88843/CA/NCI NIH HHS/United States GR - ImNIH/Intramural NIH HHS/United States GR - N01CO12400/CA/NCI NIH HHS/United States GR - N01-CO-12400/CO/NCI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, N.I.H., Intramural PT - Research Support, U.S. Gov't, Non-P.H.S. DEP - 20080507 PL - United States TA - Cancer Res JT - Cancer research JID - 2984705R RN - 0 (Homeodomain Proteins) RN - 0 (Hoxb7 protein, mouse) RN - EC 2.7.10.1 (Receptor, ErbB-2) SB - IM MH - Alleles MH - Animals MH - Apoptosis MH - Cell Proliferation MH - Disease Progression MH - Homeodomain Proteins/*genetics/*physiology MH - Lung Neoplasms/*pathology/*secondary MH - Mammary Neoplasms, Animal/*genetics/pathology/*therapy MH - Mice MH - Neoplasm Metastasis MH - Neovascularization, Pathologic MH - Oligonucleotide Array Sequence Analysis MH - Phenotype MH - Receptor, ErbB-2/*genetics MH - Treatment Outcome PMC - PMC3715065 MID - NIHMS485968 COIS- Disclosure of Potential Conflicts of Interest No potential conflicts of interest were disclosed. EDAT- 2008/05/09 09:00 MHDA- 2008/06/25 09:00 PMCR- 2013/07/18 CRDT- 2008/05/09 09:00 PHST- 2008/05/09 09:00 [pubmed] PHST- 2008/06/25 09:00 [medline] PHST- 2008/05/09 09:00 [entrez] PHST- 2013/07/18 00:00 [pmc-release] AID - 0008-5472.CAN-07-2926 [pii] AID - 10.1158/0008-5472.CAN-07-2926 [doi] PST - ppublish SO - Cancer Res. 2008 May 15;68(10):3637-44. doi: 10.1158/0008-5472.CAN-07-2926. Epub 2008 May 7.