Genetic heterogeneity in Pakistani microcephaly families

TY - JOUR

T1 - Genetic heterogeneity in Pakistani microcephaly families

AU - Sajid Hussain, M

AU - Bakhtiar, Syeda Marriam

AU - Farooq, Muhammad

AU - Anjum, I

AU - Janzen, E

AU - Reza Toliat, M

AU - Eiberg, H

AU - Kjaer, K W

AU - Tommerup, N

AU - Noegel, A A

AU - Nürnberg, Peter

AU - Baig, S M

AU - Hansen, L

N1 - © 2012 John Wiley & Sons A/S.

PY - 2013/5

Y1 - 2013/5

N2 - Autosomal recessive primary microcephaly (MCPH) is caused by mutations in at least eight different genes involved either in cell division or DNA repair. Most mutations are identified in consanguine families from Pakistan, Iran and India. To further assess their genetic heterogeneity and mutational spectra, we have analyzed 57 consanguine Pakistani MCPH families. In 34 MCPH families, we detected linkage to five out of the eight well-characterized disease loci and identified mutations in 27 families, leaving seven families without mutations in the coding exons of the presumably underlying MCPH genes. In the MCPH cohort 23 families could not be linked to any of the known loci, pointing to remarkable locus heterogeneity. The majority of mutations were found in ASPM followed by WDR62, CENPJ, CEP152 and MCPH1. One ASPM mutation (p.Trp1326*) was found in as many as eight families suggesting a Pakistani founder mutation. One third of the families were linked to ASPM followed by WDR62 confirming previous data. We identified three novel ASPM mutations, four novel WDR62 mutations, one novel MCPH1 mutation and two novel CEP152 mutations. CEP152 mutations have not been described before in the Pakistani population.

AB - Autosomal recessive primary microcephaly (MCPH) is caused by mutations in at least eight different genes involved either in cell division or DNA repair. Most mutations are identified in consanguine families from Pakistan, Iran and India. To further assess their genetic heterogeneity and mutational spectra, we have analyzed 57 consanguine Pakistani MCPH families. In 34 MCPH families, we detected linkage to five out of the eight well-characterized disease loci and identified mutations in 27 families, leaving seven families without mutations in the coding exons of the presumably underlying MCPH genes. In the MCPH cohort 23 families could not be linked to any of the known loci, pointing to remarkable locus heterogeneity. The majority of mutations were found in ASPM followed by WDR62, CENPJ, CEP152 and MCPH1. One ASPM mutation (p.Trp1326*) was found in as many as eight families suggesting a Pakistani founder mutation. One third of the families were linked to ASPM followed by WDR62 confirming previous data. We identified three novel ASPM mutations, four novel WDR62 mutations, one novel MCPH1 mutation and two novel CEP152 mutations. CEP152 mutations have not been described before in the Pakistani population.

U2 - 10.1111/j.1399-0004.2012.01932.x

DO - 10.1111/j.1399-0004.2012.01932.x

M3 - Journal article

C2 - 22775483

SN - 0009-9163

VL - 83

SP - 446

EP - 451

JO - Clinical Genetics

JF - Clinical Genetics

IS - 5

ER -