ENDOTHELIAL NITRIC OXIDE SYNTHASE (ENOS) GENE POLYMORPHISM IS ASSOCIATED WITH AGE ONSET OF MENARCHE IN SICKLE CELL DISEASE FEMALES OF INDIA

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Sudhansu Sekhar Nishank *
(*) Corresponding Author:
Sudhansu Sekhar Nishank | nishank25@gmail.com

Abstract

ABSTRACT

 

Background and Objective :  Females with sickle cell disease (SCD) often show late onset of menarche. In transgenic sickle cell mouse, deficiency of gene encoding endothelial nitric oxide synthase (eNOS) has been reported to be associated with late onset of menarche. Thus to explore the possible association of eNOS gene polymorphism with age of onset of menarche in SCD females, 3 important eNOS gene polymorphism- eNOS 4a/b, eNOS 894G>T and eNOS-786 T>C  and  plasma nitrite levels were tested among three groups of females- SCD late menarche, SCD early menarche and control females.

Methods : PCR-RFLP method for genotyping eNOS gene polymorphisms and quantification of plasma nitrite level by ELISA based commercial kits were used

Results: SCD late menarche females showed significantly higher prevalence and higher association of heterozygous genotypes, higher frequency of mutant alleles ‘4a’, ‘T’ and ‘C’ as compared to that of control group and SCD early menarche group. The frequency of haplotype  ‘4a-G-C’ and haplotype’ 4b-G-C’ (alleles in order of  eNOS 4a/b, eNOS 894G>T and eNOS-786 T>C respectively) were found to be significantly high in SCD late menarche compared to combined groups of SCD early menarche and controls. SCD late menarche group had significantly low level of plasma nitrite concentration for all 3 eNOS gene polymorphisms as compared to controls and SCD early menarche females.

Conclusion: eNOS gene polymorphism may influence age of onset of menarche in SCD females.

 

Key words : eNOS gene, sickle cell disease, menarche, haplotype, nitric oxide

 


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Author Biography

Sudhansu Sekhar Nishank, Dr. Sudhansu Sekhar Nishank ( Email - nishank25@gmail.com ) DIV OF GENETICS REGIONAL MEDICAL RESEARCH CENTRE FOR TRIBALS (ICMR) NAGPUR ROAD, P.O.- GARHA JABALPUR-482003 MADHYA PRADESH, INDIA Phone- +91-0674-2741421 FAX- +91-0674-2741421

Dr. Sudhansu Sekhar Nishank  ( Email - nishank25@gmail.com ) DIV OF GENETICS REGIONAL  MEDICAL  RESEARCH  CENTRE FOR TRIBALS (ICMR) NAGPUR ROAD, P.O.- GARHA JABALPUR-482003 MADHYA PRADESH,  INDIA Phone-  +91-0674-2741421  FAX- +91-0674-2741421