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Open Access Highly Accessed Research

Deletion mutation in BSCL2 gene underlies congenital generalized lipodystrophy in a Pakistani family

Obaid Ur Rahman1, Nadeem Khawar2, Muhammad Aman Khan3, Jawad Ahmed1, Kamran Khattak4, Jumana Yousuf Al-Aama5, Muhammad Naeem3 and Musharraf Jelani15*

Author Affiliations

1 Medical Genetics and Molecular Biology Unit, Biochemistry Department, Institute of Basic Medical Sciences, Khyber Medical University, Peshawar 25000, Pakistan

2 Pediatrics Department, Khyber Teaching Hospital, Peshawar 25000, Pakistan

3 Biotechnology Department, Quaid-i-Azam University, Islamabad 44000, Pakistan

4 Pediatric Cardiology Department, Hayatabad Medical Complex, Peshawar 25000, Pakistan

5 Princess Al-Jawhara Albrahim Center of Excellence in Research of Hereditary Disorders, King Abdulaziz University, Jeddah 80205, Kingdom of Saudi Arabia

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Diagnostic Pathology 2013, 8:78  doi:10.1186/1746-1596-8-78

Published: 9 May 2013

Abstract

Background

Congenital generalized lipodystrophy (CGL) also known as Berardinelli-Seip Congenital Lipodystrophy (BSCL) is a genetically heterogeneous disorder characterized by loss of adipose tissues, Acanthosis nigricans, diabetes mellitus, muscular hypertrophy, hepatomegaly and hypertriglyceridemia. There are four subclinical phenotypes of CGL (CGL1-4) and mutations in four genes AGPAT2, BSCL2, CAV1 and PTRF have been assigned to each type.

Methods

The study included clinical and molecular investigations of CGL disease in a consanguineous Pakistani family. For mutation screening all the coding exons including splice junctions of AGPAT2, BSCL2, CAV1 and PTRF genes were PCR amplified and sequenced directly using an automated DNA sequencer ABI3730.

Results

Sequence analysis revealed a single base pair deletion mutation (c.636delC; p.Tyr213ThrfsX20) in exon 5 of BSCL2 gene causing a frame shift and premature termination codon.

Conclusion

Mutation identified here in BSCL2 gene causing congenital generalized lipodystrophy is the first report in Pakistani population. The patients exhibited characteristic features of generalized lipodystrophy, Acanthosis nigricans, diabetes mellitus and hypertrophic cardiomyopathy.

Virtual Slides

The virtual slide(s) for this article can be found here: http://www.diagnosticpathology.diagnomx.eu/vs/1913913076864247 webcite.

Keywords:
Congenital generalized lipodystrophy; BSCL2; Deletion mutation; Pakistani population