Related Experiment Video
Updated: Aug 7, 2025

A Colorimetric Assay that Specifically Measures Granzyme B Proteolytic Activity: Hydrolysis of Boc-Ala-Ala-Asp-S-Bzl
Published on: November 28, 2014
Granzyme B Gene Polymorphisms Are Associated With Severe Non-segmental Vitiligo
Abd El-Aziz El-Taweel1, Amira Abdelrahman2, Hebatallah Hegazy3
1Dr. El-Taweel is with Faculty of Medicine at 6th of October University in Cairo, Egypt.
Background:
Granzyme B (GZMB) gene is related to human immunity and is considered as one of the genes indulged in vitiligo.
Objective:
To evaluate the association between GZMB (R55Q) and (P94Q) gene polymorphisms with vitiligo development in a sample of vitiligo Egyptian patients.
Methods:
This study was a case-control study which included 100 non-segmental vitiligo patients as well as a control group consisted of 100 healthy, sex and age matched vitiligo free individuals. The polymorphism of GZMB gene at (R55Q) and (P94A) were analyzed by polymerase chain reaction.
Results:
P94Q and R55Q gene polymorphisms were significantly associated with higher VASI scores.
Conclusion:
GZMB (Q55R) and P94A) gene polymorphisms are associated with the susceptibility to develop vitiligo in the Egyptian population and could help predicting more extensive forms of the disease.
Related Concept Videos
Genome-wide Association Studies-GWAS
GWAS does not require the identification of the target gene involved in...
Pleiotropy
Exon Recombination
Exon shuffling follows “splice frame rules.” Each exon...
Epistasis Analysis
Skin Diseases and Disorders
Gram-positive Staphylococcus spp. and Streptococcus spp. are responsible for many of the most common skin infections. However, many...

