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A study on the ALAD gene polymorphisms associated with lead exposure
1Department of Genetics, Bhagwan Mahavir Medical Research Centre, Hyderabad, AP, India.
Toxicology and Industrial Health
|November 26, 2008
Summary
Delta-aminolevulinic acid dehydratase (ALAD) gene polymorphism influences lead toxicity responses. Certain ALAD genotypes showed higher blood lead levels, indicating a role in lead exposure consequences.
Area of Science:
- Environmental Health
- Genetics
- Toxicology
Background:
- Delta-aminolevulinic acid dehydratase (ALAD) is crucial in heme synthesis and implicated in lead poisoning.
- Genetic variations in the ALAD gene may modulate individual susceptibility to lead toxicity.
Purpose of the Study:
- To investigate the association between ALAD gene G177C polymorphism and blood lead levels (BLL).
- To evaluate the impact of ALAD polymorphism on hematological parameters in lead-exposed individuals.
Main Methods:
- Genotyping of ALAD G177C polymorphism using PCR and RFLP.
- Quantification of BLL via anode stripping voltammetry.
- Analysis of complete blood counts using an ADVIA cell counter.
Main Results:
- While overall BLL did not significantly differ across genotypes, ALAD 1-2/2-2 genotypes exhibited higher BLL (80.51 microg/dL) compared to ALAD 1-1 (50.4 microg/dL).
- Occupationally exposed individuals had significantly higher BLL than controls.
- A notable percentage (29.2%) of exposed workers had low hemoglobin levels (<10.0 g/dL).
Conclusions:
- ALAD G177C polymorphism may influence BLL and hematological responses to lead exposure.
- Combined assessment of ALAD genotype, BLL, and hematological parameters aids in understanding lead exposure effects.
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