MUZAMMIL AHMAD KHAN
Articles written in Journal of Genetics
Volume 93 Issue 2 August 2014 pp 527-530 Research Note
Volume 96 Issue 2 June 2017 pp 383-387 RESEARCH NOTE
Autosomal recessive primary microcephaly is a rare genetic disorder that is characterized by reduced head circumference and a varying degree of intellectual disability. Genetic studies on consanguineous families with primary microcephaly have identified 15 (MCPH) causative genes that include MCPH1, WDR62, CDK5RAP2, CASC5, ASPM, CENPJ, STIL, CEP135,CEP152, ZNF335, PHC1, CDK6, CENPE, SASS6 MFSD2A ANKLE2 and CIT (Khan et al. 2014; Yamamoto et al. 2014; Alakbarzade et al. 2015;Morris-Rosendahl and Kaindl 2015; Basit et al. 2016). Physiologically, most of these MCPH proteins are involved in cell cycle and its regulation. In the present clinical genetic study, we have present two consanguineous Pakistanifamilies segregating primary microcephaly and intellectual disability. These families were ascertained from the Saraiki ethnic part of Khyber-Pakhtunkhwa province in Pakistan. Whole exome sequencing in one family revealed a novel 1-bp deletion NM_018136.4: c.10013delA (p.Asp3338Valfs*2), while the other family showed a previously reported nonsense mutation NM_018136.4: c.9730C>T (rs199422195 (p.Arg3244*)) in ASPM gene. The novel frame-shift mutation (p.Asp3338Valfs*2) in ASPM presumably truncates the protein synthesis that results in loss of armadillo-type fold domain.
Volume 100 All articles Published: 4 August 2021 Article ID 0057 RESEARCH ARTICLE
Leber congenital amaurosis (LCA) is a rare form of early onset vision loss or blindness due to retinal dystrophy. This condition is characterized by early vision loss, nystagmus and severe retinal dysfunction. To date, genetic studies have reported 19 genes to be associated with autosomal recessive LCA, most of which are involved in the retinal morphology and the physiology of the phototransduction pathway. In the current study, a large consanguineous family segregating congenital blindness was ascertained from the Dera IsmailKhan region of Pakistan. Genetic analysis was performed through genomewide SNP genotyping (for homozygosity-by-descent mapping), whole-exome sequencing (for mutation identification) and Sanger sequencing (for segregation analysis).
Volume 100, 2021
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