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Promoter Methylation and mRNA Expression of Response Gene to Complement 32 in Breast Carcinoma


Affiliations
1 Genetics of Non-Communicable Disease Research Center, Zahedan University of Medical Sciences, Zahedan, Iran, Islamic Republic of
2 Department of Clinical Biochemistry, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran, Islamic Republic of
3 School of Dentistry, Zahedan University of Medical Sciences, Zahedan, Iran, Islamic Republic of
 

Background: Response gene to complement 32 (RGC32), induced by activation of complements, has been characterized as a cell cycle regulator; however, its role in carcinogenesis is still controversial. In the present study we compared RGC32 promoter methylation patterns and mRNA expression in breast cancerous tissues and adjacent normal tissues. Materials and Methods: Sixty-three breast cancer tissues and 63 adjacent nonneoplastic tissues were included in our study. Design: Nested methylation-specific polymerase chain reaction (Nested-MSP) and quantitative PCR (qPCR) were used to determine RGC32 promoter methylation status and its mRNA expression levels, respectively. Results: RGC32 methylation pattern was not different between breast cancerous tissue and adjacent nonneoplastic tissue (OR = 2.30, 95% CI = 0.95–5.54). However, qPCR analysis displayed higher levels of RGC32 mRNA in breast cancerous tissues than in noncancerous tissues (1.073 versus 0.959; 𝑃 = 0.001), irrespective of the promoter methylation status.The expression levels and promoter methylation of RGC32 were not correlated with any of patients’ clinical characteristics (𝑃 > 0.05). Conclusion: Our findings confirmed upregulation of RGC32 in breast cancerous tumors, but it was not associated with promoter methylation patterns.
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  • Promoter Methylation and mRNA Expression of Response Gene to Complement 32 in Breast Carcinoma

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Authors

Ebrahim Eskandari-Nasab
Genetics of Non-Communicable Disease Research Center, Zahedan University of Medical Sciences, Zahedan, Iran, Islamic Republic of
Mohammad Hashemi
Department of Clinical Biochemistry, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran, Islamic Republic of
Firoozeh Rafighdoost
School of Dentistry, Zahedan University of Medical Sciences, Zahedan, Iran, Islamic Republic of

Abstract


Background: Response gene to complement 32 (RGC32), induced by activation of complements, has been characterized as a cell cycle regulator; however, its role in carcinogenesis is still controversial. In the present study we compared RGC32 promoter methylation patterns and mRNA expression in breast cancerous tissues and adjacent normal tissues. Materials and Methods: Sixty-three breast cancer tissues and 63 adjacent nonneoplastic tissues were included in our study. Design: Nested methylation-specific polymerase chain reaction (Nested-MSP) and quantitative PCR (qPCR) were used to determine RGC32 promoter methylation status and its mRNA expression levels, respectively. Results: RGC32 methylation pattern was not different between breast cancerous tissue and adjacent nonneoplastic tissue (OR = 2.30, 95% CI = 0.95–5.54). However, qPCR analysis displayed higher levels of RGC32 mRNA in breast cancerous tissues than in noncancerous tissues (1.073 versus 0.959; 𝑃 = 0.001), irrespective of the promoter methylation status.The expression levels and promoter methylation of RGC32 were not correlated with any of patients’ clinical characteristics (𝑃 > 0.05). Conclusion: Our findings confirmed upregulation of RGC32 in breast cancerous tumors, but it was not associated with promoter methylation patterns.