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Lymphangioleiomyomatosis Biomarkers Linked to Lung Metastatic Potential and Cell Stemness.


ABSTRACT: Lymphangioleiomyomatosis (LAM) is a rare lung-metastasizing neoplasm caused by the proliferation of smooth muscle-like cells that commonly carry loss-of-function mutations in either the tuberous sclerosis complex 1 or 2 (TSC1 or TSC2) genes. While allosteric inhibition of the mechanistic target of rapamycin (mTOR) has shown substantial clinical benefit, complementary therapies are required to improve response and/or to treat specific patients. However, there is a lack of LAM biomarkers that could potentially be used to monitor the disease and to develop other targeted therapies. We hypothesized that the mediators of cancer metastasis to lung, particularly in breast cancer, also play a relevant role in LAM. Analyses across independent breast cancer datasets revealed associations between low TSC1/2 expression, altered mTOR complex 1 (mTORC1) pathway signaling, and metastasis to lung. Subsequently, immunohistochemical analyses of 23 LAM lesions revealed positivity in all cases for the lung metastasis mediators fascin 1 (FSCN1) and inhibitor of DNA binding 1 (ID1). Moreover, assessment of breast cancer stem or luminal progenitor cell biomarkers showed positivity in most LAM tissue for the aldehyde dehydrogenase 1 (ALDH1), integrin-ß3 (ITGB3/CD61), and/or the sex-determining region Y-box 9 (SOX9) proteins. The immunohistochemical analyses also provided evidence of heterogeneity between and within LAM cases. The analysis of Tsc2-deficient cells revealed relative over-expression of FSCN1 and ID1; however, Tsc2-deficient cells did not show higher sensitivity to ID1-based cancer inhibitors. Collectively, the results of this study reveal novel LAM biomarkers linked to breast cancer metastasis to lung and to cell stemness, which in turn might guide the assessment of additional or complementary therapeutic opportunities for LAM.

SUBMITTER: Ruiz de Garibay G 

PROVIDER: S-EPMC4500593 | biostudies-literature | 2015

REPOSITORIES: biostudies-literature

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Lymphangioleiomyomatosis Biomarkers Linked to Lung Metastatic Potential and Cell Stemness.

Ruiz de Garibay Gorka G   Herranz Carmen C   Llorente Alicia A   Boni Jacopo J   Serra-Musach Jordi J   Mateo Francesca F   Aguilar Helena H   Gómez-Baldó Laia L   Petit Anna A   Vidal August A   Climent Fina F   Hernández-Losa Javier J   Cordero Álex Á   González-Suárez Eva E   Sánchez-Mut José Vicente JV   Esteller Manel M   Llatjós Roger R   Varela Mar M   López José Ignacio JI   García Nadia N   Extremera Ana I AI   Gumà Anna A   Ortega Raúl R   Plà María Jesús MJ   Fernández Adela A   Pernas Sònia S   Falo Catalina C   Morilla Idoia I   Campos Miriam M   Gil Miguel M   Román Antonio A   Molina-Molina María M   Ussetti Piedad P   Laporta Rosalía R   Valenzuela Claudia C   Ancochea Julio J   Xaubet Antoni A   Casanova Álvaro Á   Pujana Miguel Angel MA  

PloS one 20150713 7


Lymphangioleiomyomatosis (LAM) is a rare lung-metastasizing neoplasm caused by the proliferation of smooth muscle-like cells that commonly carry loss-of-function mutations in either the tuberous sclerosis complex 1 or 2 (TSC1 or TSC2) genes. While allosteric inhibition of the mechanistic target of rapamycin (mTOR) has shown substantial clinical benefit, complementary therapies are required to improve response and/or to treat specific patients. However, there is a lack of LAM biomarkers that coul  ...[more]

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