microRNA-143 down-regulates Hexokinase 2 in colon cancer cells
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microRNA-143 down-regulates Hexokinase 2 in colon cancer cells. / Gregersen, Lea Haarup; Jacobsen, Anders; Frankel, Lisa; Wen, Jiayu; Krogh, Anders; Lund, Anders H.
I: B M C Cancer, Bind 12, Nr. 232, 2012.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - microRNA-143 down-regulates Hexokinase 2 in colon cancer cells
AU - Gregersen, Lea Haarup
AU - Jacobsen, Anders
AU - Frankel, Lisa
AU - Wen, Jiayu
AU - Krogh, Anders
AU - Lund, Anders H.
PY - 2012
Y1 - 2012
N2 - ABSTRACT: BACKGROUND: MicroRNAs (miRNAs) are well recognized as gene regulators and have been implicated in the regulation of development as well as human diseases. miR-143 is located at a fragile site on chromosome 5 frequently deleted in cancer, and has been reported to be down-regulated in several cancers including colon cancer. METHODS: To gain insight into the role of miR-143 in colon cancer, we used a microarray-based approach in combination with seed site enrichment analysis to identify miR-143 targets. RESULTS: As expected, transcripts down-regulated upon miR-143 overexpression had a significant enrichment of miR-143 seed sites in their 3' UTRs. Here we report the identification of Hexokinase 2 (HK2) as a direct target of miR-143. We show that re-introduction of miR-143 in the colon cancer cell line DLD-1 results in a decreased lactate secretion. CONCLUSION: We have identified and validated HK2 as a miR-143 target. Furthermore, our results indicate that miR-143 mediated down-regulation of HK2 affects glucose metabolism in colon cancer cells. We hypothesize that loss of miR-143-mediated repression of HK2 can promote glucose metabolism in cancer cells, contributing to the shift towards aerobic glycolysis observed in many tumors.
AB - ABSTRACT: BACKGROUND: MicroRNAs (miRNAs) are well recognized as gene regulators and have been implicated in the regulation of development as well as human diseases. miR-143 is located at a fragile site on chromosome 5 frequently deleted in cancer, and has been reported to be down-regulated in several cancers including colon cancer. METHODS: To gain insight into the role of miR-143 in colon cancer, we used a microarray-based approach in combination with seed site enrichment analysis to identify miR-143 targets. RESULTS: As expected, transcripts down-regulated upon miR-143 overexpression had a significant enrichment of miR-143 seed sites in their 3' UTRs. Here we report the identification of Hexokinase 2 (HK2) as a direct target of miR-143. We show that re-introduction of miR-143 in the colon cancer cell line DLD-1 results in a decreased lactate secretion. CONCLUSION: We have identified and validated HK2 as a miR-143 target. Furthermore, our results indicate that miR-143 mediated down-regulation of HK2 affects glucose metabolism in colon cancer cells. We hypothesize that loss of miR-143-mediated repression of HK2 can promote glucose metabolism in cancer cells, contributing to the shift towards aerobic glycolysis observed in many tumors.
U2 - 10.1186/1471-2407-12-232
DO - 10.1186/1471-2407-12-232
M3 - Journal article
C2 - 22691140
VL - 12
JO - B M C Cancer
JF - B M C Cancer
SN - 1471-2407
IS - 232
ER -
ID: 38276981