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Year : 2015  |  Volume : 49  |  Issue : 6  |  Page : 589-594

Degenerated intervertebral disc prolapse and its association of collagen I alpha 1 Spl gene polymorphism: A preliminary case control study of Indian population

1 Department of Neurosurgery, Kamineni Hospitals, Hyderabad, Telangana, India
2 Department of Genetics and Molecular Medicine, Kamineni Hospitals, Hyderabad, Telangana, India

Correspondence Address:
Shailendra D Anjankar
Department of Neurosurgery, Kamineni Hospitals, L. B. Nagar, Hyderabad, Telangana
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0019-5413.168765

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Background: Degenerated disc disease (DDD) is a common disorder responsible for increased morbidity in a productive age group. Its etiology is multifactorial and genetic factors have been predominantly implicated. Disc prolapse results due to tear in the annulus, which is a fibrous structure composed largely of type I collagen. Functional polymorphism at the Sp1 site of the collagen I alpha 1 (COL1A1) gene has shown a positive association with DDD in Dutch and Greek populations. The purpose of this study was to assess COL1A1 Sp1 gene polymorphism in the Indian population. Materials and Methods: Fifty clinically and radiologically proven patients with disc prolapse requiring surgery were included as cases and 50 healthy, age-matched volunteers served as controls. After isolating DNA from their blood sample, genotyping for COL1A1 polymorphism (rs1800012) was performed and identified as GG, GT, and TT. Results: The mean age and body mass index in cases and controls were similar. 76% of the patients were males. The most common site of disc degeneration was L4–L5 (36%), followed by L5–S1 (34%). Homozygous–GG, heterozygous GT, and homozygous TT genotypes were seen in 38 (76%), 10 (20%) and 2 (4%) cases respectively, controls had similar percentage of genotypes as well. The alleles in cases and the control group showed no significant difference (P = 0.6744) and followed the Hardy–Weinberg Equilibrium in the study population. Conclusion: The COL1A1 (rs1800012) is in Hardy–Weinberg equilibrium in the present subset of Indian population. But taken as a single factor, it was not found to be associated with DDD in this preliminary study. Disc degeneration is multifactorial and also anticipated to be a result of multiple genes involvement and gene-gene interaction.

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