Linked Life Data

19904749

Source:http://linkedlifedata.com/resource/pubmed/id/19904749

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2010-5-3
pubmed:abstractText
Multicellular resistance (MCR) is produced because multicellular spheroids (MCSs) are formed with a broad cell-cell connection when cultured in three-dimensions, which limits the clinical treatment efficacy in solid tumors. Focal adhesion kinase (FAK) plays an important role in apoptosis, survival and cell adhesion between cells and their extracellular matrix. In this study, we investigated the expressions of FAK, Akt and NF-kappaB in human colorectal cancer (CRC), and the effects of FAK gene silencing on MCSs formation and 5-fluorouracil (5-FU) chemosensitivity in colon carcinoma MCSs culture cells. In CRC samples, FAK, Akt and NF-kappaB were overexpressed. The positive expression of FAK correlated notably with lymph node metastasis and cellular differentiation. Positive expressions of Akt and NF-kappaB were significantly related to cellular differentiation and lymph node metastasis, respectively. Furthermore, positive expression of FAK correlated with that of Akt and NF-kappaB. The expression of FAK was inhibited significantly by a small hairpin RNA targeting FAK. Knockdown of FAK reversed the formation and aggregation of MCSs, significantly decreased the 50% inhibitory concentration of 5-FU, and markedly increased MCS culture cells apoptosis. These effects were associated with reduced levels of Akt and NF-kappaB. These results indicate that suppressing FAK expression potentiated 5-FU-induced cytotoxicity and contributed to its chemosensitizing effect by suppressing Akt/NF-kappaB signaling in colon carcinoma MCS culture cells. These data also imply that FAK mediates MCR of CRC through the survival signaling pathway FAK/Akt/NF-kappaB.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
1097-0215
pubmed:author
pubmed:issnType
Electronic
pubmed:day
1
pubmed:volume
127
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
195-206
pubmed:meshHeading
pubmed-meshheading:19904749-Aged, pubmed-meshheading:19904749-Antimetabolites, Antineoplastic, pubmed-meshheading:19904749-Apoptosis, pubmed-meshheading:19904749-Base Sequence, pubmed-meshheading:19904749-Blotting, Western, pubmed-meshheading:19904749-Cell Line, Tumor, pubmed-meshheading:19904749-Colorectal Neoplasms, pubmed-meshheading:19904749-DNA Primers, pubmed-meshheading:19904749-Female, pubmed-meshheading:19904749-Fluorouracil, pubmed-meshheading:19904749-Focal Adhesion Protein-Tyrosine Kinases, pubmed-meshheading:19904749-Gene Knockdown Techniques, pubmed-meshheading:19904749-Gene Silencing, pubmed-meshheading:19904749-Humans, pubmed-meshheading:19904749-Immunohistochemistry, pubmed-meshheading:19904749-Male, pubmed-meshheading:19904749-Middle Aged, pubmed-meshheading:19904749-NF-kappa B, pubmed-meshheading:19904749-Proto-Oncogene Proteins c-akt, pubmed-meshheading:19904749-Reverse Transcriptase Polymerase Chain Reaction, pubmed-meshheading:19904749-Signal Transduction
pubmed:year
2010
pubmed:articleTitle
The effect of focal adhesion kinase gene silencing on 5-fluorouracil chemosensitivity involves an Akt/NF-kappaB signaling pathway in colorectal carcinomas.
pubmed:affiliation
Department of Oncology, Southwest Hospital, Third Military Medical University, Chongqing, People's Republic of China.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't