DNA Methylation Analysis of Steroid Hormone Receptor Genes

  • Ignacio Camacho-ArroyoEmail author
  • Valeria Hansberg-Pastor
  • Mauricio Rodríguez-Dorantes
Part of the Methods in Molecular Biology book series (MIMB, volume 1165)


Steroid hormone receptors (SHR) are important transcription factors for regulating different physiological and pathological processes. Their altered expression has been strongly associated to cancer progression. Epigenetic marks such as DNA methylation have been proposed as one of the regulatory mechanisms for SHR expression in cancer. DNA methylation occurs at CpG dinucleotides, which form clusters known as CpG islands. These islands are mostly observed at promoter regions of housekeeping genes, and their aberrant methylation in cancer cells is associated with silencing of tumor-suppressor gene expression. SHR genes are characterized for presenting alternative promoters with different CpG island content, which are prone to be methylated. The method of choice for studying DNA methylation is bisulfite sequencing, since it provides information about the methylation pattern at single-nucleotide level. The method is based on the deamination of cytosine residues to uracil after treatment with sodium bisulfite. The converted DNA is amplified by a polymerase chain reaction, cloned, and sequenced. Here, we describe a protocol for bisulfite sequencing suitable for analyzing different CpG regions in SHR genes.

Key words

Epigenetic DNA methylation Bisulfite sequencing Steroid hormone receptor CpG islands 


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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Ignacio Camacho-Arroyo
    • 1
    Email author
  • Valeria Hansberg-Pastor
    • 1
  • Mauricio Rodríguez-Dorantes
    • 2
  1. 1.Departamento de Biología, Facultad de QuímicaUniversidad Nacional Autónoma de México, Av. Universidad 3000, Ciudad UniversitariaCoyoacán, MéxicoMéxico
  2. 2.Instituto Nacional de Medicina Genómica, Periférico Sur, Álvaro ObregónMéxicoMéxico

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