Abstract:
:A greater understanding of the molecular basis of breast cancer metastasis will lead to identification of novel therapeutic targets and better treatments. Rap1B is a small GTPase that suppresses the metastasis of breast cancer cells by increasing cell-cell adhesion. In breast cancer, a decrease in Rap1B prenylation and subsequent loss of Rap1B at the plasma membrane decreases cell-cell adhesion and increases cell scattering, which promotes the metastatic phenotype. Protein kinase A (PKA) was recently found to phosphorylate Rap1B and inhibit its prenylation. PKA is activated by G protein-coupled receptors (GPCR) that stimulate Gαs. In this study, we investigated whether the general Gαs activator, cholera toxin, and agonists of the β-adrenergic receptor (βAR), which is a Gαs-coupled GPCR, promote Rap1B phosphorylation and inhibit its prenylation. We show here that cholera toxin and βAR activation phosphorylate Rap1B and inhibit its prenylation and membrane localization, reducing cell-cell adhesion and promoting cell scattering. Furthermore, we report that breast cancer cell migration is decreased by the FDA-approved β-blocker, propranolol. Pharmacological targeting of GPCRs, especially those such as the βAR that are regulated by FDA-approved drugs, to increase cell adhesion and decrease cell scattering could provide a promising therapeutic approach to reduce breast cancer metastasis.
journal_name
Cancer Biol Therjournal_title
Cancer biology & therapyauthors
Wilson JM,Lorimer E,Tyburski MD,Williams CLdoi
10.1080/15384047.2015.1070988subject
Has Abstractpub_date
2015-01-01 00:00:00pages
1364-74issue
9eissn
1538-4047issn
1555-8576journal_volume
16pub_type
杂志文章abstract::DNA methylation at the 5 position of cytosine (5-mC) has emerged as a key epigenetic marker that plays essential roles in various biological and pathological processes. 5-mC can be converted to 5-hydroxymethylcytosine (5-hmC) by the ten-eleven translocation (TET) family proteins, which is now widely recognized as the ...
journal_title:Cancer biology & therapy
pub_type: 杂志文章,评审
doi:10.4161/cbt.27144
更新日期:2014-01-01 00:00:00
abstract::The screening for BRAF V600E mutation is employed in clinical practice for its prognostic and potentially predictive role in patients with metastatic colorectal carcinoma (mCRC). Little information is available on the sensitivity and specificity of the testing methods to detect this mutation in CRC. By using serial di...
journal_title:Cancer biology & therapy
pub_type: 杂志文章
doi:10.1080/15384047.2016.1195048
更新日期:2016-08-02 00:00:00
abstract::Imatinib, an ABL tyrosine kinase inhibitor (TKI), has shown clinical efficacy against chronic myeloid leukemia (CML). However, a substantial number of patients develop resistance to imatinib treatment due to the emergence of clones carrying mutations in the protein BCR-ABL. The phosphoinositide 3 kinase (PI3K)/Akt/mam...
journal_title:Cancer biology & therapy
pub_type: 杂志文章
doi:10.4161/cbt.26725
更新日期:2014-02-01 00:00:00
abstract::We investigated the role of vasculogenic mimicry (VM) in the progression of prostate cancer (PCa). Ninety-six patients who had undergone prostatectomy for treatment of PCa and for whom a complete record of clinical and follow-up data were available were reviewed. VM and matrix metalloproteinase-2 (MMP-2) were detected...
journal_title:Cancer biology & therapy
pub_type: 杂志文章
doi:10.4161/cbt.19602
更新日期:2012-05-01 00:00:00
abstract::While several hypotheses have been put forward to explain how prostate tumors become resistant to androgen deprivation therapy, the mechanism by which prostate tumors have increased androgen concentrations as compared to the serum has been poorly explored. Using a stromal/epithelial cell co-culture model, Mizokami et ...
journal_title:Cancer biology & therapy
pub_type: 杂志文章
doi:10.4161/cbt.9.3.11143
更新日期:2010-02-01 00:00:00
abstract::Telomerase is the ribonucleoprotein that enables cancer and stem cells to maintain their telomeres, resulting in unlimited proliferative potential. The catalytic component of telomerase in humans, hTERT, is upregulated in nearly 90% of all cancers, making it the most widely expressed marker of malignancy. With the exc...
journal_title:Cancer biology & therapy
pub_type: 杂志文章,评审
doi:10.4161/cbt.2.2.255
更新日期:2003-03-01 00:00:00
abstract::The Id (Inhibitor of differentiation or Inhibitor of DNA-binding) proteins act as dominant negative inhibitors of differentiation-specific basic Helix-Loop-Helix (bHLH) transcription factors. Id proteins negatively regulate cellular differentiation and they induce proliferation by modulating different cell cycle regul...
journal_title:Cancer biology & therapy
pub_type: 杂志文章,评审
doi:10.4161/cbt.50
更新日期:2002-03-01 00:00:00
abstract::Mutationally activated and oncogenic versions of the ras genes were first identified in human tumors in 1982. This discovery prompted great interest in the development of anti-Ras strategies as novel, target-based approaches for cancer treatment. The three human ras genes represent the most frequently mutated oncogene...
journal_title:Cancer biology & therapy
pub_type: 杂志文章,评审
doi:10.4161/cbt.306
更新日期:2002-11-01 00:00:00
abstract::The present studies sought to further understand how the anti-folate pemetrexed and the multi-kinase inhibitor sorafenib interact to kill tumor cells. Sorafenib activated SRC, and via SRC the drug combination activated ERK1/2. Expression of dominant negative SRC or dominant negative MEK1 abolished drug-induced ERK1/2 ...
journal_title:Cancer biology & therapy
pub_type: 杂志文章
doi:10.4161/cbt.20562
更新日期:2012-07-01 00:00:00
abstract::The enzyme 8-oxoguanine glycosylase 1 (OGG1) repairs 8-oxo-2-deoxyguanosine residue (8-oxodG) an oxidatively damaged promutagenic base. Genetic variations in OGG1 gene have been shown to modulate DNA repair capacity and are related risk of tumor development. However, epidemiologic findings have been inconsistent. The ...
journal_title:Cancer biology & therapy
pub_type: 杂志文章
doi:10.4161/cbt.7.1.5120
更新日期:2008-01-01 00:00:00
abstract::5-fluorouracil forms classic (covalent, ternary) complexes consisting of thymidylate synthase, fluoro-deoxyuridine monophosphate, and 5,10-methylene tetrahydrofolate. Despite a high pharmacologic interest in the classic complexes formed in cells treated with fluorouracil anticancer agents, the in vivo stability of the...
journal_title:Cancer biology & therapy
pub_type: 杂志文章
doi:10.4161/cbt.5.8.2976
更新日期:2006-08-01 00:00:00
abstract::Melanoma is the deadliest form of skin cancer. In the early stages, melanoma can be treated successfully with surgery alone and survival rates are high, but after metastasis survival rates drop significantly. Therefore, early and correct diagnosis is key for ensuring patients have the best possible prognosis. Melanoma...
journal_title:Cancer biology & therapy
pub_type: 杂志文章,评审
doi:10.1080/15384047.2019.1640032
更新日期:2019-01-01 00:00:00
abstract::A number of discoveries have clarified the molecular mechanism of apoptosis, thus clarifying the link between apoptosis and therapeutic outcome. Even though apoptosis is thought to play a major role in anticancer therapy, the clinical relevance of induction of apoptosis remains uncertain, particularly in solid tumors....
journal_title:Cancer biology & therapy
pub_type: 杂志文章,评审
doi:10.4161/cbt.5.11.3456
更新日期:2006-11-01 00:00:00
abstract::We have previously identified tumor susceptibility gene101 (TSG101), overexpressed in vincristine-resistant human gastric adenocarcinoma cell line SGC7901/VCR using a modified subtractive hybridization method and Western blot. In the present study, we constructed two siRNA eukaryotic expression vectors of TSG101 and t...
journal_title:Cancer biology & therapy
pub_type: 杂志文章
doi:10.4161/cbt.3.6.847
更新日期:2004-06-01 00:00:00
abstract::The 26S proteasome is a large multi-subunit protein complex found in the cytoplasm and nucleus of mammalian cells which plays a critical role in intracellular proteolysis. It has been found that the 26S proteasome degrades multiple important substrates which are associated with tumor growth and development. Emerging e...
journal_title:Cancer biology & therapy
pub_type: 杂志文章
doi:10.4161/cbt.5.7.2971
更新日期:2006-07-01 00:00:00
abstract::It was well known that cancer-associated fibroblasts (CAFs) were an essential factor in tumor progression. However, the actual mechanism of stromal fibroblasts activation and tumor promoting effects remain unclear. Here, we showed that KLF5 expression was more frequently observed in gastric cancer-associated fibroblas...
journal_title:Cancer biology & therapy
pub_type: 杂志文章
doi:10.1080/15384047.2017.1373219
更新日期:2017-10-03 00:00:00
abstract:PURPOSE:Indoleamine 2,3-dioxygenase (IDO), a tryptophan catabolic enzyme, plays an important role in immune escape through suppressing T-cell function. Since Vav1 signaling pathway regulates T cell homeostasis, this study was designed to test the hypothesis that IDO induces T-cell immunosuppression through inhibiting V...
journal_title:Cancer biology & therapy
pub_type: 杂志文章
doi:10.4161/cbt.8.14.8882
更新日期:2009-07-01 00:00:00
abstract::The phosphoinositide 3-kinase (PI3K)/Akt signaling pathway is important in nasopharyngeal carcinoma (NPC) pathogenesis. Activated PI3K and its downstream target Akt are concernful signaling molecules and key survival factors involved in the control of cell proliferation, apoptosis and oncogenesis. The protein kinase A...
journal_title:Cancer biology & therapy
pub_type: 杂志文章
doi:10.4161/cbt.8.4.7433
更新日期:2009-02-01 00:00:00
abstract::Prostate cancer is the second leading cause of cancer deaths among men. The availability of animal models that represent the events and factors that exist in the natural history and biology of human prostate cancer is essential in dealing with prostate cancer. In recent decades and presently, emphasis has been directe...
journal_title:Cancer biology & therapy
pub_type: 杂志文章
doi:10.4161/cbt.12.12.18367
更新日期:2011-12-15 00:00:00
abstract::Cytotoxic chemotherapeutic drugs, especially when used in combination, are widely employed to treat a variety of cancers in patients but often lead to serious symptoms that negatively affect physical functioning and quality of life. There is compelling evidence that implicates cytotoxic chemotherapy-induced inflammati...
journal_title:Cancer biology & therapy
pub_type: 杂志文章
doi:10.4161/cbt.29922
更新日期:2014-10-01 00:00:00
abstract:BACKGROUND:IL-24 (interleukin-24) is a promising, multi-functional anti-cancer agent able to selectively induce tumor cell apoptosis while sparing normal cells. Additionally, IL-24 can enhance the immune response to tumors and suppress tumor angiogenesis. In this study, we introduced IL-24 into the oncolytic adenovirus...
journal_title:Cancer biology & therapy
pub_type: 杂志文章
doi:10.4161/cbt.10.3.12308
更新日期:2010-08-01 00:00:00
abstract::Heterotypic hybrids created between dendritic cells (DC) and tumor cells represent an efficient approach for loading DC with tumor-associated antigens (TAA) and DC-tumor hybrid vaccines have shown promising outcomes in various preclinical and clinical studies. Conventional DC-tumor hybrid preparations, however, are un...
journal_title:Cancer biology & therapy
pub_type: 杂志文章
doi:10.4161/cbt.3.11.1217
更新日期:2004-11-01 00:00:00
abstract::Bone metastases are a common occurrence in patients with breast cancer, lung cancer and prostate cancer. Bone metastases cause considerable morbidity including pain, impaired mobility, pathologic fracture, spinal cord or nerve root compression, bone marrow infiltration and hypercalcemia of malignancy. These complicati...
journal_title:Cancer biology & therapy
pub_type: 杂志文章,评审
doi:10.4161/cbt.5.9.3308
更新日期:2006-09-01 00:00:00
abstract::Nimotuzumab (h-R3) is a humanized anti-epidermal growth factor receptor monoclonal antibody (mAb) registered for treating head and neck tumours. The present study was designed to evaluate the systemic and skin toxicity of chronic intravenous administration of the h-R3 in a relevant species demonstrated by comparing th...
journal_title:Cancer biology & therapy
pub_type: 杂志文章
doi:10.4161/cbt.6.9.4539
更新日期:2007-09-01 00:00:00
abstract::Chronic arsenic treatment induces epithelial-mesenchymal transition (EMT) and promotes tumorigenicity, but the mechanism is unclear. MiR-100 has been shown to be involved in this biologic process. In this study, we hypothesize that inactivation of miR-100 combined with low concentration of arsenic exposure could promo...
journal_title:Cancer biology & therapy
pub_type: 杂志文章
doi:10.1080/15384047.2017.1345393
更新日期:2017-12-02 00:00:00
abstract::Angiomyolipoma (AML) is classified as a perivascular epithelioid cell neoplasm, mostly occurring in the kidney. Twenty percent of patients with renal AML have tuberous sclerosis complex (TSC) caused by germline variation in the TSC1 or TSC2 gene. In this paper, we report the first case of renal AML harboring somatic m...
journal_title:Cancer biology & therapy
pub_type: 杂志文章
doi:10.1080/15384047.2019.1702406
更新日期:2020-04-02 00:00:00
abstract::Ecto-5'-nucleotidase (CD73) was overexpressed in malignancies of epithelial origin and was involved in a variety of cellular processes such as cytoprotection and anti-inflammation. In the present study, human mammary T-47D cells were transfected with pcDNA-NT5E to establish a CD73 overexpressed cell model. Short small...
journal_title:Cancer biology & therapy
pub_type: 杂志文章
doi:10.4161/cbt.6.3.3762
更新日期:2007-03-01 00:00:00
abstract::The hypothesis of the "liquid biopsy" using circulating tumor cells (CTCs) emerged as a minimally invasive alternative to traditional tissue biopsy to determine cancer therapy. Discordance for biomarkers expression between primary tumor tissue and circulating tumor cells (CTCs) has been widely reported, thus rendering...
journal_title:Cancer biology & therapy
pub_type: 杂志文章
doi:10.4161/cbt.28020
更新日期:2014-05-01 00:00:00
abstract::Alterations in the function of cell cycle checkpoints are frequently detected in oral squamous cell carcinomas (OSCCs), and are often associated with the sensitivity of the cancer cells to chemotherapeutic drugs. Recently, a mitotic checkpoint gene, Chfr, was shown to be inactivated by promoter methylation and point m...
journal_title:Cancer biology & therapy
pub_type: 杂志文章
doi:10.4161/cbt.4.7.1896
更新日期:2005-07-01 00:00:00
abstract::Cancer cells convert glucose preferentially to lactate even in the presence of oxygen (aerobic glycolysis-Warburg effect). New concepts in cancer treatment aim at inhibition of aerobic glycolysis. Pyruvate dehydrogenase converts pyruvate to acetylCoA thus preventing lactate formation. Therefore, the aim of this study ...
journal_title:Cancer biology & therapy
pub_type: 杂志文章
doi:10.4161/cbt.22003
更新日期:2012-12-01 00:00:00