A Genetic Marker for Rosacea ?

Looks like a promising start in finding a genetic marker for susceptibility to develop rosacea.

I have asked the author for a simple summary of their findings and what is might mean for the diagnosis and management of rosacea.

Before we get too excited it is worth noting that this is a short article and the conclusion says that more work is needed to say that this is indeed a genetic marker we can rely on.

GSTM1 and GSTT1 null genotypes as possible heritable factors of rosacea

Ayca Cordan Yazici, Lulufer Tamer, Guliz Ikizoglu, Tamer Irfan Kaya, Hale Api, Hatice Yildirim, Aynur Adiguzel: Department of Dermatology, Faculty of Medicine, Mersin University, Zeytinlibahce-Mersin, Turkey, Department of Biochemistry, Faculty of Medicine, Mersin University, Zeytinlibahce-Mersin, Turkey, and Department of Dermatology, Faculty of Medicine, Baskent University, Adana, Turkey.

Photodermatology, Photoimmunology & Photomedicine, Volume 22 Page 208 – August 2006

Brief communication

Purpose: Rosacea might be related to an increased activity of reactive oxygen species (ROS) and deficient function of the antioxidant system. Glutathione S-transferases (GSTs) play a primer role in cellular defense against electrophilic chemical species and radical oxygen species. We hypothesized that increased ROS activity or decreased antioxidant potential, possibly induced by GST gene polymorphism, might have a pathogenic role in rosacea.

Methods: The study group consisted of 45 patients with rosacea and 100 control subjects. DNA samples were isolated from blood samples using high pure polymerase chain reaction (PCR) Template preparation Kit. The GSTM1, GSTT1, and P1 polymorphisms were detected using a real-time PCR and fluorescence resonance energy transfer with a Light-Cycler Instrument. Associations between specific genotypes and the development of rosacea were examined using logistic regression analyses to calculate odds ratios (OR) and 95% confidence intervals (CI).

Results: GSTM1 and GSTT1 null genotypes were found to be statistically different from control (P=0.005, P=0.009, respectively), and associated with an increased risk of rosacea (OR [95% CI]: 2.84 [1.37–5.89]; OR [95% CI]: 2.68 [1.27–5.67], respectively). There was a statistically significant relationship between both null combination of the GSTM1 and GSTT1 genotype polymorphisms and rosacea (P=0.003, OR [95% CI]: 4.18 [1.57–11.13]). There were no statistically significant differences between patient and control groups for the GSTP1 Ile/Ile, Ile/Val, and Val/Val genotypes (P>0.05).

Conclusion: We demonstrated a significant association between the GSTT1 and/or GSTM1 null genotypes and rosacea. However, the potential role of GSTs as markers of susceptibility to rosacea needs further studies in larger patient groups.

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About the Author

About the Author: David Pascoe started the Rosacea Support Group in October 1998. .

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