Yan YQ, Liu HT, Feng TP, Zhao JZ, Li SL. Clinical pathological significance of HMGA1 and HMGA2 protein expression in esophageal squamous cell carcinoma.
Shijie Huaren Xiaohua Zazhi 2010;
18:2869-2873. [DOI:
10.11569/wcjd.v18.i27.2869]
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Abstract
AIM: To explore the relationship of the protein expression of high mobility group protein AT-hook 1 (HMGA1) and HMGA2 with the development, progression, invasion and metastasis of esophageal squamous cell carcinoma.
METHODS: Sixty-two patients with esophageal squamous cell carcinoma treated at Anyang Tumor Hospital from February 2006 to March 2006 were included in this study. Immunohistochemistry was used to detect the protein expression of HMGA1 and HMGA2 in 62 esophageal squamous cell carcinoma specimens, 31 tumor adjacent atypical hyperplastic epithelial specimens, and 62 normal esophageal epithelial specimens.
RESULTS: The expression of HMGA1 protein was closely correlated with tumor grade, infiltration, lymphatic metastasis and TNM grade in esophageal squamous cell carcinoma (χ2 = 6.649, 6.175, 5.921 and 11.341, respectively; all P < 0.05). The positive rates of HMGA1 protein expression in normal esophageal epithelium, tumor-adjacent atypical hyperplastic epithelium and carcinoma were 8.1% (5/62), 58.1% (18/31) and 69.4% (43/62), respectively, with a significant difference among the three groups (χ2 = 51.429, P < 0.01). The expression of HMGA2 protein was closely correlated with lymphatic metastasis and TNM grade in esophageal squamous cell carcinoma (χ2 = 8.276 and 17.851, respectively; both P < 0.05). The positive rates of HMGA2 protein expression in normal esophageal epithelium, tumor-adjacent atypical hyperplastic epithelium and carcinoma were 71.0% (44/62), 48.4% (15/31) and 4.8% (3/62), respectively, with a significant difference among the three groups (χ2 = 57.621, P < 0.01). There is a positive correlation between the protein expression of HMGA1 and HMGA2 (γp = 0.346, P = 0.006).
CONCLUSION: HMGA1 and HMGA2 play an important role in the carcinogenesis, infiltration and metastasis of esophageal carcinoma. Combined detection of HMGA1 and HMGA2 expression may be used as a molecular parameter for early diagnosis and prognostic evaluation of esophageal squamous cell carcinoma.
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