Abstract:
:Secreted protein, acidic and rich in cysteine (SPARC, also known as osteonectin or BM-40) is a glycoprotein component of the extracellular matrix that has been reported to be involved with a variety of cellular processes. Although SPARC expression levels are frequently altered in a variety of tumor types, the exact implications of deregulated SPARC expression--whether it promotes, inhibits or has no effect on tumor progression--have remained unclear. Our recent gene expression analyses have shown that SPARC is significantly downregulated in highly metastatic human prostate cancer cells. To test the role of endogenous SPARC in tumorigenesis directly, we examined cancer progression and metastasis in SPARC(+/-) and SPARC(-/-) mice using two separate transgenic mouse tumor models: transgenic adenocarcinoma of the mouse prostate (TRAMP) and murine mammary tumor virus-polyoma middle T (MMTV-PyMT). Surprisingly, in both instances, we found that loss of SPARC had no significant effects on tumor initiation, progression or metastasis. Tumor angiogenesis and collagen deposition were also largely unaffected. Our results indicate that, although differential SPARC expression may be a useful marker of aggressive, metastasis-prone tumors, loss of SPARC is not sufficient either to promote or to inhibit cancer progression in two spontaneous mouse tumor models.
journal_name
Clin Exp Metastasisjournal_title
Clinical & experimental metastasisauthors
Wong SY,Crowley D,Bronson RT,Hynes ROdoi
10.1007/s10585-007-9126-2subject
Has Abstractpub_date
2008-01-01 00:00:00pages
109-18issue
2eissn
0262-0898issn
1573-7276journal_volume
25pub_type
杂志文章abstract::We have investigated the role of sialylation on cell-cell adhesion mediated by E-cadherin. Two MCF-7 human breast cancer cell variants were studied: MCF-7/AZ cells showed a spontaneous cell-cell adhesion in the fast and slow aggregation assay. whereas the adhesion deficient MCF-7/6 cell variant failed to form larger a...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章
doi:10.1023/a:1006639804430
更新日期:1999-05-01 00:00:00
abstract::Breast cancer metastasizes to bone with high frequency and incidence. However, studies of breast cancer metastasis to bone have been limited by two factors. First, the number of models that colonize bone are limited. Second, detection of bone metastases is too insensitive or too laborious for routine, large-scale stud...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章
doi:10.1023/a:1024062911144
更新日期:2003-01-01 00:00:00
abstract::Lung cancer is the most frequent and one of the most deadly cancer types and is classified into small cell lung cancer and non-small cell lung cancer (NSCLC). Transforming growth factor beta (TGFβ) regulates a wide array of cell functions and plays a major role in lung diseases, including NSCLC. TGFβ signals through t...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章
doi:10.1007/s10585-013-9598-1
更新日期:2013-12-01 00:00:00
abstract::A variant cell line (EL-4ad) which adhered to a tissue culture dish was isolated from highly metastatic EL-4 murine T-lymphoma. The experimental and spontaneous metastatic ability of EL-4ad was lower than that of the EL-4 parent cell line. The cell surface phenotypes of both cell lines were CD2+3+4-8-45+TCR alpha beta...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章
doi:10.1007/BF00058169
更新日期:1992-09-01 00:00:00
abstract::Bone sialoprotein (BSP) and osteopontin (OPN) are important factors in the metastasis of breast cancer, which were examined as targets for antineoplastic therapy by siRNA. In addition, the effect of gene silencing on their transcription factor Runx2 and their interaction partners integrin β(3) and matrix metalloprotei...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章
doi:10.1007/s10585-012-9462-8
更新日期:2012-06-01 00:00:00
abstract::Tumor metastases are extremely rare in striated muscles. This is surprising given the fact that this tissue constitutes 60% of body weight. The present study focuses on small molecules produced and secreted by muscle cells which possess anti-cancer activity in vivo. Recently we have shown that a low molecular weight f...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章
doi:10.1023/a:1006649617918
更新日期:1999-01-01 00:00:00
abstract::In this study the relationship between brain structure and brain metastases (BM) occurrence was analyzed. A model for predicting the time of BM onset in patients with non-small cell lung cancer (NSCLC) was proposed. Twenty patients were used to develop the model, whereas the remaining 69 were used for independent vali...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章
doi:10.1007/s10585-016-9833-7
更新日期:2017-02-01 00:00:00
abstract::The growth of metastatic prostate cancer cells in the bone involves an intimate interaction between the tumor cells and various elements of the bone microenvironment, resulting in increased rate of bone turnover and rapid tumor growth. The alpha(v)beta3 integrin has been shown to play an important role in tumor growth...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章
doi:10.1023/a:1025461507027
更新日期:2003-01-01 00:00:00
abstract::We have previously isolated a series of MCF-7 human breast cancer cell variants which no longer require estrogen-supplementation for tumor growth in nude mice (Clarke et al. Proc Natl Acad Sci USA 86: 3649-3653, 1989). We now report that these hormone-independent and hormone-responsive variants (MIII, MCF7/LCC1) can i...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章
doi:10.1007/BF00880062
更新日期:1993-01-01 00:00:00
abstract::The chemokine CXCL12/SDF-1 and its receptors CXCR4 and CXCR7 play a major role in tumor invasion, proliferation and metastasis. Since both receptors are overexpressed on distinct tumor cells and on the tumor vasculature, we evaluated their potential as targets for detection of cancers by molecular imaging. We synthesi...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章
doi:10.1007/s10585-011-9403-y
更新日期:2011-12-01 00:00:00
abstract::We investigated the role of signal transduction systems in the attachment of human uveal melanoma cells to matrix proteins. Ocular melanoma cells established from primary tumours attached rapidly to all substrates examined. Preferred substrates of attachment were collagens type I, III and IV and fibronectin rather tha...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章
doi:10.1007/BF01755881
更新日期:1994-11-01 00:00:00
abstract::Metastatic bone disease is an important clinical problem which has proven difficult to study because of a lack of noninvasive investigative modalities. Here we show that dual-energy X-ray absorptiometry (DXA) scanning provides clinically useful information about the status of metastatic bone lesions in cancer patients...
journal_title:Clinical & experimental metastasis
pub_type: 临床试验,杂志文章
doi:10.1023/a:1010991213842
更新日期:2000-01-01 00:00:00
abstract::Treating metastatic osteosarcoma (OS) remains a challenge in oncology. Current treatment strategies target the primary tumour rather than metastases and have a limited efficacy in the treatment of metastatic disease. Metastatic cells have specific features that render them less sensitive to therapy and targeting these...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章,评审
doi:10.1007/s10585-011-9384-x
更新日期:2011-06-01 00:00:00
abstract::In order to study the usefulness of treatment with vinblastine (VLB) in the prevention of cancer metastasis in squamous cell lung cancer, 50 patients with locoregional disease were randomized to receive either locoregional RT alone (group A) or a weekly intravenous bolus injection of VLB (6 mg/m2) concurrently with an...
journal_title:Clinical & experimental metastasis
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1007/BF01580405
更新日期:1988-01-01 00:00:00
abstract::Prostate cancer metastases form selectively in the bone marrow. Previously we demonstrated motility was important for the formation of primary prostatic epithelial cell colonies in bone marrow stroma (BMS) co-culture. In this study we looked at the influence of motility factors on the colony formation of epithelial ce...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章
doi:10.1023/a:1006696002497
更新日期:1999-06-01 00:00:00
abstract::Tumor metastasis often confers poor prognosis for cancer patients due to lack of comprehensive strategy in dealing with cells growing in different environment. Current anticancer therapies have incomplete effectiveness because they were designed assuming metastatic tumors behave similarly in different organs. We hypot...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章
doi:10.1007/s10585-015-9761-y
更新日期:2016-02-01 00:00:00
abstract::The spinal column is the most frequent site of bone metastasis in patients with breast cancer. It is important to understand how the pattern of vertebral lesions may be affected by the introduction of modern cancer therapies. The purpose of this study was to characterize changes in the radiological appearance of spina...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章
doi:10.1007/s10585-008-9219-6
更新日期:2009-01-01 00:00:00
abstract::The BRMS1 metastasis suppressor was recently shown to negatively regulate NF-kappaB signaling and down regulate NF-kappaB-dependent uPA expression. Here we confirm that BRMS1 expression correlates with reduced NF-kappaB DNA binding activity in independently derived human melanoma C8161.9 cells stably expressing BRMS1....
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章
doi:10.1007/s10585-009-9235-1
更新日期:2009-01-01 00:00:00
abstract::We studied the influence of 10 synthetic glycoamine analogs on colony formation in 0.3 and 0.9% agarose by metastatic human breast carcinoma (MDA-MB-435) and melanoma (TXM-13) cells. Nine synthetic analogs significantly inhibited the colony formation in 0.9% agarose of MDA-MB-435 human breast carcinoma cells; five com...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章
doi:10.1007/BF00053899
更新日期:1996-05-01 00:00:00
abstract::The concurrent administration of Metrazol (60 mg/kg, i.v.) to anaesthetized rats enhances the cerebral penetration of the anticancer agent razoxane. Such an enhancement leads to an increase in the therapeutic efficacy of razoxane against intracerebrally sequestered L1210 leukaemia cells in mice. The combination of Met...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章
doi:10.1007/BF00132306
更新日期:1984-01-01 00:00:00
abstract::Using alternative splicing reporters we have previously observed mesenchymal epithelial transitions in Dunning AT3 rat prostate tumors. We demonstrate here that the Dunning DT and AT3 cells, which express epithelial and mesenchymal markers, respectively, represent an excellent model to study epithelial transitions sin...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章
doi:10.1007/s10585-008-9186-y
更新日期:2008-01-01 00:00:00
abstract::Melanoma is an aggressive cutaneous malignancy with rapidly rising incidence. Diagnosis of controversial melanocytic lesions, correct prognostication of patients, selection of appropriate adjuvant and systemic therapies, and prediction of response to a given therapy remain very real challenges. Despite these challenge...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章,评审
doi:10.1007/s10585-018-9892-z
更新日期:2018-08-01 00:00:00
abstract::Growth of human tumor cells as three-dimensional (3D) multicellular spheroids modifies their invasive properties. Here we study the differences in the biological features of MCF-7, a human breast cancer cell line, and its multidrug resistant variant (MDR-MCF-7) cultured as spheroids or as monolayers. Three-dimensional...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章
doi:10.1023/a:1014594825502
更新日期:2002-01-01 00:00:00
abstract::Evidence suggests that multiple tumors, including pancreatic adenocarcinoma, display heterogeneity in parameters that are critical for tumor formation, progression and metastasis. Understanding heterogeneity in solid tumors is increasingly providing a plethora of new diagnostic and therapeutic approaches. In this stud...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章
doi:10.1007/s10585-009-9260-0
更新日期:2009-01-01 00:00:00
abstract::Basement membrane forms widespread barriers to tumor invasion. It has been shown that tumor-secreted, basement membrane-degrading enzymes, namely metalloproteinases (MMPs) play an important role in tumor invasion and metastasis. In this study, we determined the enzymatic activity, content, and mRNA of both the 72 kDa ...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章
doi:10.1007/BF00118181
更新日期:1995-11-01 00:00:00
abstract::Vascularization of solid tumors is thought to occur by sprouting or intussusceptive angiogenesis, co-option of existing vessels, and vasculogenic mimicry after the onset of tumor hypoxia, when the tumor radius exceeds the oxygen diffusion distance. In contrast, here we show that individual endothelial cells that are i...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章
doi:10.1007/s10585-009-9257-8
更新日期:2009-01-01 00:00:00
abstract::Single cell progenies (SCPs) inherit biological properties from their isogenetic mother cells. If a single cancer cell can give rise to progenies, which can be passaged sustainably in vitro and produce tumor in xenotransplantation, the cell should be cancer initiating cell. CD133 (Prominin-1, Prom1) is the marker of h...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章
doi:10.1007/s10585-010-9341-0
更新日期:2010-10-01 00:00:00
abstract::Metastasis is the most devastating aspect of cancer and it is the main cause of morbidity and mortality in cancer patients. Tumor cell adhesion to the vascular endothelial cell lining is an important step in metastatic progression and is prompted by platelets. Mucin 1 is over-expressed and aberrantly glycosylated in m...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章
doi:10.1007/s10585-012-9461-9
更新日期:2012-06-01 00:00:00
abstract::Although the loss of sulfomucins was known as an indicator of carcinogenesis and malignant progression of colonic epithelia, it was not known whether the loss was directly related to the malignant behavior of colon carcinoma cells. We have studied the biological properties of LS174T human colon carcinoma cells before ...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章
doi:10.1023/a:1006654027742
更新日期:1999-03-01 00:00:00
abstract::Metastasis is a vital target for cancer treatment, since the majority of cancer patients die from metastatic, rather than the primary disease. KiSS1 has been identified as a metastasis suppressor gene in melanoma and breast carcinomas. We show here that KiSS1 is also a metastasis suppressor in human ovarian cancer. Ov...
journal_title:Clinical & experimental metastasis
pub_type: 杂志文章
doi:10.1007/s10585-005-8186-4
更新日期:2005-01-01 00:00:00