Hypermethylation of hMLH1 promoter in sporadic colorectal cancer / 浙江大学学报·医学版
Journal of Zhejiang University. Medical sciences
;
(6): 395-398, 2004.
Article
Dans Chinois
| WPRIM
| ID: wpr-353296
ABSTRACT
<p><b>OBJECTIVE</b>To identify CpG island hypermethylation of 5'region of hMLH1 promotor and to explore its relationship to microsatellite instability(MSI)in sporadic colorectal carcinoma.</p><p><b>METHODS</b>Forty-one pairs of tissue specimens (normal and cancer) were collected from 41 patients with colorectal cancer. Hypermethylation of hMLH1 promoter was detected by methylation specific PCR; the relationship between methylation and clinicopathological features was analyzed. Combined with BAT25 and BAT26, the MSI status was detected using an automated fluorescent DNA sequencer.</p><p><b>RESULTS</b>Hypermethylation of hMLH1 promoter was detected in 75.6 % (31/41) of samples. Mean age of unmethylation cases (49.2 y) was significantly younger than that of methylation cases (63.6 y) (P<0.05), but there were no differences between two groups in other clinicopathological features. MSI was detected in 43.9 % samples (18/41); hypermethylation of hMLH1 promoter was detected in 94.4 % (17/18) of MSI(+) samples, which was higher than that in MSI(-) samples (60.9 %,14/23, P<0.05).</p><p><b>CONCLUSION</b>Age-related hypermethylation is generally found in patients with sporadic colorectal cancers, which may cause MSI and might be the mechanism in the development of colorectal cancer of elderly people.</p>
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Protéines nucléaires
/
Tumeurs colorectales
/
Protéines de transport
/
Régions promotrices (génétique)
/
Répétitions microsatellites
/
Ilots CpG
/
Méthylation de l'ADN
/
Protéines adaptatrices de la transduction du signal
/
Réparation de l'ADN
/
Protéine-1 homologue de MutL
Limites du sujet:
Adulte
/
Adulte très âgé
/
Aged80
/
Femelle
/
Humains
/
Mâle
langue:
Chinois
Texte intégral:
Journal of Zhejiang University. Medical sciences
Année:
2004
Type:
Article
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