Aihua Wei1, Xiumin Yang, Shi Lian, Wei Li. 1. Department of Dermatology, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China.
Abstract
BACKGROUND: Oculocutaneous albinism (OCA) is a relatively common inherited disorder in all populations worldwide. The mutational spectra of OCA are population-specific. OBJECTIVE: Based on our previous molecular epidemiological studies, we have implemented an optimized strategy for the genetic testing of Chinese OCA patients. METHODS: Genomic DNA was extracted from the blood samples of 52 clinically diagnosed OCA patients and 100 unaffected subjects. The amplified DNA segments were screened for mutations of TYR, OCA2, TYRP1, SLC45A2 and HPS1 by direct sequencing. To exclude the previously unidentified alleles (PUAs) from polymorphisms, samples from 100 unaffected controls were sequenced for the same regions of variations. RESULTS: Among the 52 OCA patients, 26 (50.0%) were found mutations on TYR gene, 8 (15.4%) on OCA2, 12 (23.1%) on SLC45A2, 2 (3.8%) on HPS1, and 4 (7.7%) patients uncharacterized. We identified 18 PUAs in these patients, 2 in TYR, 7 in OCA2, 8 in SLC45A2, and 1 in HPS1. CONCLUSION: The optimized method to screen the OCA mutations is efficiently implemented in the routine genetic testing of Chinese OCA patients accompanied with genetic counseling.
BACKGROUND: Oculocutaneous albinism (OCA) is a relatively common inherited disorder in all populations worldwide. The mutational spectra of OCA are population-specific. OBJECTIVE: Based on our previous molecular epidemiological studies, we have implemented an optimized strategy for the genetic testing of Chinese OCA patients. METHODS: Genomic DNA was extracted from the blood samples of 52 clinically diagnosed OCA patients and 100 unaffected subjects. The amplified DNA segments were screened for mutations of TYR, OCA2, TYRP1, SLC45A2 and HPS1 by direct sequencing. To exclude the previously unidentified alleles (PUAs) from polymorphisms, samples from 100 unaffected controls were sequenced for the same regions of variations. RESULTS: Among the 52 OCA patients, 26 (50.0%) were found mutations on TYR gene, 8 (15.4%) on OCA2, 12 (23.1%) on SLC45A2, 2 (3.8%) on HPS1, and 4 (7.7%) patients uncharacterized. We identified 18 PUAs in these patients, 2 in TYR, 7 in OCA2, 8 in SLC45A2, and 1 in HPS1. CONCLUSION: The optimized method to screen the OCA mutations is efficiently implemented in the routine genetic testing of Chinese OCA patients accompanied with genetic counseling.
Authors: Qing Yang; Xin He; Lin Yang; Zhiyong Zhou; Andrew R Cullinane; Aihua Wei; Zhe Zhang; Zhenhua Hao; Aili Zhang; Min He; Yaqin Feng; Xiang Gao; William A Gahl; Marjan Huizing; Wei Li Journal: Traffic Date: 2012-05-28 Impact factor: 6.215
Authors: Marjan Huizing; May C V Malicdan; Jennifer A Wang; Hadass Pri-Chen; Richard A Hess; Roxanne Fischer; Kevin J O'Brien; Melissa A Merideth; William A Gahl; Bernadette R Gochuico Journal: Hum Mutat Date: 2020-01-23 Impact factor: 4.700