Clinical Neuroscience

Paraoxonáz-1-aktivitás és fenotípusos megjelenése sclerosis multiplexben

KURTULUS Fatma1, YAMAN Aylin1, ELLIDAG Yasar Hamit2, EREN Esin3, GÖMCELI Bicer Yasemin1, YILMAZ Necat2

MAY 30, 2016

Clinical Neuroscience - 2016;69(05-06)


Introduction - Human serum paraoxonase (PON1) and arylesterase (ARE) are lipophilic antioxidant enzymes. PON-1 serum activity diverges in individuals and populations, which might be due to polymorphisms in the PON-1 gene. The PON1 activity phenotyping method, based on the ratio of the stimulated PON activity and the ARE activity, could determine the low-activity homozygotes (QQ), intermediate activity heterozygotes (QR), and high-activity homozygotes (RR) regardless of the genotype. The aim of the present study was to determine the PON1 phenotype distribution and enzymatic activity of PON1 and ARE in multiple sclerosis (MS) patients. Materials and methods - Thirty-four relapsing remitting MS (RRMS) patients (22 females and 12 males; median age 42 (range 20-55) years) in the remission phase and thirty-four age-sex matched healthy controls (19 females and 15 males; median age 37 (21-60) years) were included in this study. All patients had clinically definite MS according to McDonald’s criteria. Results - Serum PON1 and ARE enzyme activities, as well as salt-stimulated PON1, were not significantly different between the patient and control groups. Phenotype distributions were as follows: QQ 58.8%, QR 38.2%, and RR 3% in MS patients (n=34); QQ 44.1%, QR 50%, and RR 5.9% in the control group (n=34). QQ (low activity) phenotypic distribution was more common in MS patients than controls, but this difference was not significant (p=0.14). Conclusions - Our results did not reveal meaningful relationships between PON1 activity or PON1 phenotypes and MS. More studies in larger samples and in all phases of the disease are needed in the future.


  1. Neurology Clinic of Antalya Education and Research Hospital of Ministry of Health, Antalya, Turkey
  2. Central laboratories of Antalya Education and Research Hospital of Ministry of Health, Antalya, Turkey
  3. Biochemistry Laboratory, Antalya Public Health Center of Ministry of Health, Antalya, Turkey



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