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| Zhang,S.; Zhang,Y.; Qu,J.; Che,X.; Fan,Y.; Hou,K.; Guo,T.; Deng,G.; Song,N.; Li,C.; Wan,X.; Qu,X.; Liu,Y.. |
| Cetuximab is widely used in patients with metastatic colon cancer expressing wildtype KRAS. However, acquired drug resistance limits its clinical efficacy. Exosomes are nanosized vesicles secreted by various cell types. Tumor cell-derived exosomes participate in many biological processes, including tumor invasion, metastasis, and drug resistance. In this study, exosomes derived from cetuximab-resistant RKO colon cancer cells induced cetuximab resistance in cetuximab-sensitive Caco-2 cells. Meanwhile, exosomes from RKO and Caco-2 cells showed different levels of phosphatase and tensin homolog (PTEN) and phosphor-Akt. Furthermore, reduced PTEN and increased phosphorylated Akt levels were found in Caco-2 cells after exposure to RKO cell-derived exosomes.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cetuximab; Exosome; PTEN; Akt; Colon cancer. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2018000100609 |
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| Vespúcio,M.V.O.; Turatti,A.; Modiano,P.; Oliveira,E.C. de; Chicote,S.R.M.; Pinto,A.M.P.; Garcia,S.B.. |
| Denervation of the colon is protective against the colon cancer; however, the mechanisms involved are unknown. We tested the hypothesis that the denervated colonic mucosa could be less responsive to the action of the chemical carcinogen dimethylhydrazine (DMH). Three groups of 32 male Wistar rats were treated as follows: group 1 (G1) had the colon denervated with 0.3 mL 1.5 mM benzyldimethyltetradecylammonium (benzalkonium chloride, BAC); G2 received a single ip injection of 125 mg/kg DMH; G3 was treated with BAC + the same dose and route of DMH. A control group (Sham, N = 32) did not receive any treatment. Each group was subdivided into four groups according to the sacrifice time (1, 2, 6, and 12 weeks after DMH). Crypt fission index, ß-catenin... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Colon cancer; Dimethylhydrazine; Benzalkonium chloride; Aberrant crypt foci; SS-catenin; Megacolon. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2008000400009 |
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| Wang,Z.K.; Yang,L.; Wu,L.L.; Mao,H.; Zhou,Y.H.; Zhang,P.F.; Dai,G.H.. |
| Colon cancer is one of the most common digestive tumors. The present study aimed to explore the functional role, as well as the underlying mechanism of long non-coding RNA LINC00261 in colon cancer. Expression of LINC00261 was analyzed in colon cancer cell lines and human normal cell lines. Acquired resistance cell lines were then built and the acquired resistance efficiency was detected by evaluating cell viability. Thereafter, the effects of LINC00261 overexpression on cisplatin-resistant colon cancer cells were measured, as well as cell apoptosis, viability, migration, and invasion. Subsequently, we investigated the interaction of LINC00261 and β-catenin. The results showed that the LINC00261 gene was down-regulated in colon cancer cell lines and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Colon cancer; LINC00261; Β-catenin; Cisplatin resistance; Mechanism. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2018000200607 |
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