Abstract | BACKGROUND AND AIM: METHODS: Thirty patients with HCC who had undergone HCC surgery were enrolled in the study. Serum arginine levels were determined with an automatic amino acid analyzer. ASS expression was examined by Western blot and immunohistochemistry. Methylation specific polymerase chain reaction and methylation sequencing were performed to detect the methylation of DNA encoding ASS. RESULTS: There was a decrease of arginine in HCC patients compared with that of healthy control. High expression of ASS was found in the adjacent tissues by Western blot and immunohistochemistry. Little ASS expression was found in most HCC tissues, but there were also some HCC tissues that expressed low levels of ASS. Methylation of the DNA encoding ASS was obviously higher in HCC tissues than that in paired adjacent tissues. CONCLUSIONS: ASS expression is decreased significantly in HCC tissues. The downregulation of arginine and ASS expression may be a self-defense action of the body against malignant tumors, and the decreased arginine and ASS levels in HCC patients are an advantage for the arginine deiminase treatment.
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Authors | Lina Wu, Li Li, Shucong Meng, Ruizhao Qi, Zebin Mao, Ming Lin |
Journal | Journal of gastroenterology and hepatology
(J Gastroenterol Hepatol)
Vol. 28
Issue 2
Pg. 365-8
(Feb 2013)
ISSN: 1440-1746 [Electronic] Australia |
PMID | 23339388
(Publication Type: Journal Article)
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Copyright | © 2012 Journal of Gastroenterology and Hepatology Foundation and Wiley Publishing Asia Pty Ltd. |
Chemical References |
- Biomarkers, Tumor
- Arginine
- Argininosuccinate Synthase
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Topics |
- Adult
- Arginine
(blood)
- Argininosuccinate Synthase
(analysis)
- Biomarkers, Tumor
(analysis)
- Blotting, Western
- Carcinoma, Hepatocellular
(blood, enzymology, genetics, pathology, surgery)
- Case-Control Studies
- DNA Methylation
- Down-Regulation
- Gene Expression Regulation, Enzymologic
- Gene Expression Regulation, Neoplastic
- Humans
- Immunohistochemistry
- Liver Neoplasms
(blood, enzymology, genetics, pathology, surgery)
- Male
- Middle Aged
- Reverse Transcriptase Polymerase Chain Reaction
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