Journal ArticleDOI
Comprehensive galectin fingerprinting in a panel of 61 human tumor cell lines by RT-PCR and its implications for diagnostic and therapeutic procedures
Harald Lahm,Sabine André,Andreas Hoeflich,Jiirgen R. Fischer,Bernard Sordat,Herbert Kaltner,Eckhard Wolf,Hans-Joachim Gabius +7 more
TLDR
To derive unequivocal diagnostic and prognostic information by immunohistochemistry on galectins with antagonistic impact on growth control and significant influence on cell adhesion, additional monitoring of these so far insufficiently studied family members is essential.Abstract:
Purpose: Knowledge about galectin expression by human tumor cells is mainly restricted to galectins-1 and -3. This study was conducted to define the gene expression pattern of all presently known human galectins in tumor cell lines of various histogenetic origin (galectinomics). Methods: The presence of mRNAs for human galectins-1, -2, -3, -4, -7, -8, and -9 was monitored by RT-PCR analyses in a panel of 61 human tumor cell lines of different origin (breast, colon, lung, brain, skin, kidney, urogenital system, hematopoietic system). Results: The validity of the technique was first confirmed by comparison of RT-PCR data with those obtained by Western blotting and cytofluorometry for galectins-1 and -3 in 18 cell lines. The following detection of a complex pattern of gene expression beyond commonly studied galectins-1 and -3 underscored the need for this fingerprinting. The most abundantly expressed message for a member of this lectin family was galectin-8 with 59 positive cell lines. With the exception of the tested lung tumors, galectin-1 and -3 transcripts were frequently expressed in the cell line panel with differences between individual cases. Positivity for galectins-2 and -4 was confined to a significant fraction of colorectal and neural tumors. Signals for galectin-9, the third known human tandem-repeat-type galectin besides -4 and -8, appeared in colorectal carcinoma cell lines with a frequency similar to that of galectin-4 but with inter-line differences. Its expression was restricted to lines of this tumor type, of the tested ovarian carcinoma, and hematopoietic malignancies. Conclusions: The results clearly demonstrate that human tumor cells express more mRNA species for galectins than those for galectins-1 and -3. To derive unequivocal diagnostic and prognostic information by immunohistochemistry on galectins with antagonistic impact on growth control and significant influence on cell adhesion, additional monitoring of these so far insufficiently studied family members is essential.read more
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PatentDOI
Mll translocations specify a distinct gene expression profile, distinguishing a unique leukemia
TL;DR: In this paper, the diagnosis of mixed lineage leukemia (MLL), acute lymphoblastic leukemia (ALL), and acute myellgenous leukemia (AML) according to the gene expression profile of a sample from an individual, as well as to methods of therapy and screening that utilize the genes indentified herein as targets.
Journal ArticleDOI
Galectins as modulators of tumour progression
TL;DR: Current research indicates that galectins have important roles in cancer; they contribute to neoplastic transformation, tumour cell survival, angiogenesis and tumour metastasis, and might have a key role helping tumours to escape immune surveillance.
Journal ArticleDOI
Combination cancer immunotherapy and new immunomodulatory targets.
TL;DR: The leading drug targets that are expressed on tumour cells and in the tumour microenvironment that allow enhancement of the antitumour immune response are discussed.
Journal ArticleDOI
Galectins and their ligands: amplifiers, silencers or tuners of the inflammatory response?
Gabriel A. Rabinovich,Linda G. Baum,Nicola Tinari,Roberto Paganelli,Clara Natoli,Fu-Tong Liu,Stefano Iacobelli +6 more
TL;DR: The current wealth of new information promises a future scenario in which individual members of the galectin family or their ligands will be used as powerful anti-inflammatory mediators and selective modulators of the immune response.
Journal ArticleDOI
Targeted inhibition of galectin-1 gene expression in tumor cells results in heightened T cell-mediated rejection; A potential mechanism of tumor-immune privilege.
Natalia Rubinstein,Mariano J. Alvarez,Norberto Walter Zwirner,Marta A. Toscano,Juan M. Ilarregui,Alicia I. Bravo,Jose Mordoh,Leonardo Fainboim,Osvaldo L. Podhajcer,Gabriel A. Rabinovich +9 more
TL;DR: In this article, the authors demonstrate that Galectin-1 signaling in activated T cells constitutes an important mechanism of tumor-immune escape and that blockade of this inhibitory signal can allow for and potentiate effective immune responses against tumor cells, with profound implications for cancer immunotherapy.
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Journal ArticleDOI
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Journal Article
Galectin-3: A novel antiapoptotic molecule with a functional BH1 (NWGR) domain of Bcl-2 family
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