Title : c-Myc overexpression sensitises colon cancer cells to camptothecin-induced apoptosis.

Pub. Date : 2003 Nov 3

PMID : 14583781






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1 c-Myc overexpression sensitises colon cancer cells to camptothecin-induced apoptosis. Camptothecin MYC proto-oncogene, bHLH transcription factor Homo sapiens
2 Using an isogenic cell system, we demonstrate that c-Myc overexpression in colon carcinoma LoVo cells resulted in sensitisation to camptothecin-induced apoptosis, thus identifying c-Myc as a potential marker predicting response of colorectal tumour cells to camptothecin. Camptothecin MYC proto-oncogene, bHLH transcription factor Homo sapiens
3 Using an isogenic cell system, we demonstrate that c-Myc overexpression in colon carcinoma LoVo cells resulted in sensitisation to camptothecin-induced apoptosis, thus identifying c-Myc as a potential marker predicting response of colorectal tumour cells to camptothecin. Camptothecin MYC proto-oncogene, bHLH transcription factor Homo sapiens
4 Using an isogenic cell system, we demonstrate that c-Myc overexpression in colon carcinoma LoVo cells resulted in sensitisation to camptothecin-induced apoptosis, thus identifying c-Myc as a potential marker predicting response of colorectal tumour cells to camptothecin. Camptothecin MYC proto-oncogene, bHLH transcription factor Homo sapiens
5 Using an isogenic cell system, we demonstrate that c-Myc overexpression in colon carcinoma LoVo cells resulted in sensitisation to camptothecin-induced apoptosis, thus identifying c-Myc as a potential marker predicting response of colorectal tumour cells to camptothecin. Camptothecin MYC proto-oncogene, bHLH transcription factor Homo sapiens
6 Both camptothecin exposure and c-Myc overexpression in LoVo cells resulted in elevation of p53 protein levels, suggesting a role of p53 in the c-Myc-imposed sensitisation to the apoptotic effects of camptothecin. Camptothecin MYC proto-oncogene, bHLH transcription factor Homo sapiens
7 Both camptothecin exposure and c-Myc overexpression in LoVo cells resulted in elevation of p53 protein levels, suggesting a role of p53 in the c-Myc-imposed sensitisation to the apoptotic effects of camptothecin. Camptothecin MYC proto-oncogene, bHLH transcription factor Homo sapiens
8 Both camptothecin exposure and c-Myc overexpression in LoVo cells resulted in elevation of p53 protein levels, suggesting a role of p53 in the c-Myc-imposed sensitisation to the apoptotic effects of camptothecin. Camptothecin MYC proto-oncogene, bHLH transcription factor Homo sapiens
9 Importantly, although camptothecin treatment markedly increased p21(Waf1/Cip1) levels in parental LoVo cells, this effect was abrogated in c-Myc-overexpressing derivatives. Camptothecin MYC proto-oncogene, bHLH transcription factor Homo sapiens
10 Finally, cDNA microarray analysis was used to identify genes that are modulated in expression by c-Myc upregulation that could serve as additional markers predicting response to camptothecin. Camptothecin MYC proto-oncogene, bHLH transcription factor Homo sapiens