Oestrogen receptor-related receptor alpha (ERRalpha) and oestrogen receptors (ERalpha and ERbeta) exhibit different gene expression in human colorectal tumour progression.
We have investigated the presence of oestrogen receptor-related (ERR) mRNA in human colorectal tumour tissues and adjacent normal mucosa by reverse transcriptase and nested-polymerase chain reaction. ERRalpha was found in 100% of the patients and ERRgamma in approximately 30% while ERRbeta was not detected at all. The multiplex PCR analysis showed elevated levels of ERRalpha mRNA in tumour tissue compartment as compared to normal mucosa, whereas ERRgamma mRNA was found in lower levels but in both tissue compartments. In contrast, oestrogen receptor (ERalpha and ERbeta) mRNA levels were shown to be decreased in tumour tissues. A positive correlation was observed between ERalpha and ERbeta and between ERalpha and ERRalpha, respectively, in normal mucosa but not in tumour tissue. ERRalpha expression in tumour tissues significantly increased from TNM stages II to IV, whereas both ERs progressively declined. These findings suggest that ERRalpha, as well as the two ERs, might play a critical role in the progression of the colorectal cancer.
Cavallini
Aldo
A
Laboratory of Biochemistry, National Institute for Digestive Diseases, IRCCS, Saverio De Bellis, Castellana Grotte, Bari, Italy. irccsbiochimica@libero.it
Notarnicola
Maria
M
Giannini
Romina
R
Montemurro
Severino
S
Lorusso
Dionigi
D
Visconti
Angelo
A
Minervini
Fiorenza
F
Caruso
Maria Gabriella
MG
D000368:Aged; D000369:Aged, 80 and over; D015179:Colorectal Neoplasms / Q000235:genetics* / Q000378:metabolism; D018450:Disease Progression; D047628:Estrogen Receptor alpha / Q000235:genetics* / Q000378:metabolism; D047629:Estrogen Receptor beta / Q000235:genetics* / Q000378:metabolism; D005260:Female; D015870:Gene Expression; D006801:Humans; D008297:Male; D008875:Middle Aged; D047495:PPAR gamma / Q000378:metabolism; D012333:RNA, Messenger / Q000378:metabolism; D018160:Receptors, Cytoplasmic and Nuclear / Q000235:genetics* / Q000378:metabolism; D011960:Receptors, Estrogen / Q000235:genetics* / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction / Q000379:methods; D014157:Transcription Factors / Q000378:metabolism; D000097983:ERRalpha Estrogen-Related Receptor
D047628:Estrogen Receptor alpha; D047629:Estrogen Receptor beta; D047495:PPAR gamma; D012333:RNA, Messenger; D018160:Receptors, Cytoplasmic and Nuclear; D011960:Receptors, Estrogen; D014157:Transcription Factors; D000097983:ERRalpha Estrogen-Related Receptor; C111264:peroxisome-proliferator-activated receptor-gamma coactivator-1