Membrane Mucin Muc4 promotes blood cell association with tumor cells and mediates efficient metastasis in a mouse model of breast cancer

Autor: Jaclyn R. Stonebraker, Ashley R. Rowson-Hodel, Alexander D. Borowsky, Matthew Saldana, Kacey VanderVorst, Jason Hatakeyama, Wanda K. O'Neal, Kermit L. Carraway, Colleen A Sweeney, Jessica H. Wald
Rok vydání: 2017
Předmět:
Male
0301 basic medicine
Cancer Research
Lung Neoplasms
Receptor
ErbB-2
Apoptosis
Neoplastic Cells
Metastasis
Blood cell
Mice
Breast cancer
ErbB-2
0302 clinical medicine
Circulating tumor cell
Circulating
2.1 Biological and endogenous factors
Aetiology
Lung
HER2/ErbB2
Cancer
Mice
Knockout
Mammary tumor
Neoplastic Cells
Circulating
Mammary Glands
3. Good health
medicine.anatomical_structure
030220 oncology & carcinogenesis
Disease Progression
Female
Tyrosine kinase
Receptor
Cell Survival
Knockout
Clinical Sciences
Oncology and Carcinogenesis
Breast Neoplasms
Biology
Article
Experimental
03 medical and health sciences
Mammary Glands
Animal
Cyclin D1
mucin
Breast Cancer
Genetics
medicine
metastasis
Animals
Humans
Oncology & Carcinogenesis
Molecular Biology
Blood Cells
Mucin-4
Animal
Large cell
Mammary Neoplasms
Mammary Neoplasms
Experimental
medicine.disease
030104 developmental biology
Muc4
Tumor progression
Immunology
Cancer research
Zdroj: Oncogene, vol 37, iss 2
Oncogene
ISSN: 1476-5594
0950-9232
Popis: Mucin-4 (Muc4) is a large cell surface glycoprotein implicated in the protection and lubrication of epithelial structures. Previous studies suggest that aberrantly expressed Muc4 can influence the adhesiveness, proliferation, viability and invasiveness of cultured tumor cells, as well as the growth rate and metastatic efficiency of xenografted tumors. Although it has been suggested that one of the major mechanisms by which Muc4 potentiates tumor progression is via its engagement of the ErbB2/HER2 receptor tyrosine kinase, other mechanisms exist and remain to be delineated. Moreover, the requirement for endogenous Muc4 for tumor growth progression has not been previously explored in the context of gene ablation. To assess the contribution of endogenous Muc4 to mammary tumor growth properties, we first created a genetically engineered mouse line lacking functional Muc4 (Muc4ko), and then crossed these animals with the NDL (Neu DeLetion mutant) model of ErbB2-induced mammary tumorigenesis. We observed that Muc4ko animals are fertile and develop normally, and adult mice exhibit no overt tissue abnormalities. In tumor studies, we observed that although some markers of tumor growth such as vascularity and cyclin D1 expression are suppressed, primary mammary tumors from Muc4ko/NDL female mice exhibit similar latencies and growth rates as Muc4wt/NDL animals. However, the presence of lung metastases is markedly suppressed in Muc4ko/NDL mice. Interestingly, histological analysis of lung lesions from Muc4ko/NDL mice revealed a reduced association of disseminated cells with platelets and white blood cells. Moreover, isolated cells derived from Muc4ko/NDL tumors interact with fewer blood cells when injected directly into the vasculature or diluted into blood from wild type mice. We further observed that blood cells more efficiently promote the viability of non-adherent Muc4wt/NDL cells than Muc4ko/NDL cells. Together, our observations suggest that Muc4 may facilitate metastasis by promoting the association of circulating tumor cells with blood cells to augment tumor cell survival in circulation.
Databáze: OpenAIRE
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