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  • 1.
    Stratmann, Johannes
    et al.
    Skovde University.
    Wang, Chaojie
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för klinisk och experimentell medicin, Onkologi.
    Gnosa, Sebastian
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Onkologi. Linköpings universitet, Hälsouniversitetet.
    Wallin, Åsa
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Onkologi. Linköpings universitet, Hälsouniversitetet.
    Hinselwood, David
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Onkologi. Linköpings universitet, Hälsouniversitetet.
    Sun, Xiao-Feng
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Onkologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Centrum för kirurgi, ortopedi och cancervård, Onkologiska kliniken US.
    Zhang, Hong
    Skovde University.
    Dicer and miRNA in relation to clinicopathological variables in colorectal cancer patients2011Inngår i: BMC Cancer, ISSN 1471-2407, E-ISSN 1471-2407, Vol. 11, nr 345Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Background: Dicer is aberrantly expressed in several types of cancers. Applying real-time PCR, we detected the expression of Dicer mRNA in normal mucosa (n = 162), primary colorectal cancer (CRC) (n = 162) and liver metastasis (n = 37), and analysed the relationship between Dicer expression and clinicopathological features. We also correlated the expression of Dicer mRNA to the miRNA expression of miR-141, miR-200a, miR-200b, mir-200c and miR-429 in liver metastases. less thanbrgreater than less thanbrgreater thanMethods: RT-PCR and qPCR were used to analyse the Dicer expression in normal mucosa, primary tumour and liver metastasis by using the High Capacity cDNA Reverse Transcription Kit and TaqMan (TM)(R) Gene Expression assays for Dicer and GAPDH. RT-PCR and qPCR were used to detect miRNA expression in liver metastases by utilizing TaqMan (R) MicroRNA Reverse Transcription Kit and TaqMan (R) miRNA Assays. Statistical analyses were performed with STATISTICA. less thanbrgreater than less thanbrgreater thanResults: Dicer expression in rectal cancer (3.146 +/- 0.953) was higher than in colon cancer (2.703 +/- 1.204, P = 0.018). Furthermore the Dicer expression was increased in primary tumours (3.146 +/- 0.952) in comparison to that in normal mucosa from rectal cancer patients (2.816 +/- 1.009, P = 0.034) but this is not evident in colon cancer patients. Dicer expression in liver metastases was decreased in comparison to that of either normal mucosa or primary tumour in both colon and rectal cancers (P andlt; 0.05). Patients with a high Dicer expression in normal mucosa had a worse prognosis compared to those with a low Dicer expression, independently of gender, age, tumour site, stage and differentiation (P andlt; 0.001, RR 3.682, 95% CI 1.749 - 7.750). In liver metastases, Dicer was positively related to miR-141 (R = 0.419, P = 0.015). less thanbrgreater than less thanbrgreater thanConclusion: Dicer is up-regulated in the early development of rectal cancers. An increased expression of Dicer mRNA in normal mucosa from CRC patients is significantly related to poor survival independently of gender, age, tumour site, stage and differentiation.

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