Analysis of CTLA4 Gene Methylation and Its Expression In Individuals With Drug Addiction

Document Type : Original Article

Authors

1 Department of Biology, University of Sistan and Baluchestan, Zahedan, Iran

2 Clinical Toxicologist, Emergency Medicine Department, Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran

Abstract

Substance abuse is known as a relapsing and chronic disorder. Drug abuse has a significant role in the dopaminergic system in which dopamine is an important neurotransmitter.  Binding dopamine and dopamine receptors could activate major intracellular signalling through protein kinase A (PKA). Activation of intracellular signalling such CREB affect gene expression of some genes. As dopamine and dopaminergic system have an important regulation role in the inhibition of immune system we analysed the effects of drug addiction on the DNA methylation and expression of cytotoxic T-lymphocyte antigen 4 (CTLA-4). We evaluate promoter methylation and mRNA expression of CTLA-4 in individual with drug addiction. DNA was extracted from blood of 74 patients with drug addiction and 59 healthy controls. Methylation of CTLA-4 promoter was assessed using a methylation-specific PCR technique. In addition the expression level of CTLA-4 was also indicated in 17 individuals with drug addiction and 18 people of controls. Although Promoter Methylation of CTLA-4 was not significantly different between these two groups, expression of CTLA-4 was remarkably different among them. We observed that each one of the drugs can increase the mRNA expression of CTLA_4. Therefore, we suggest that further research for other epigenetic factors is required to detect the underlying cause of changing gene expression.

Keywords

References

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Journal of Epigenetics
Volume 1, Issue 1
February 2019
Pages 1-7

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History

  • Receive Date: 23 May 2018
  • Revise Date: 02 January 2019
  • Accept Date: 19 February 2019
  • First Publish Date: 19 February 2019

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