Association between delta-aminolevulinic acid dehydratase polymorphism and placental lead levels. 2016

Zeliha Kayaaltı, and Selda Sert, and Dilek Kaya-Akyüzlü, and Esma Söylemez, and Tülin Söylemezoğlu
Institute of Forensic Sciences, Ankara University, Dikimevi, 06590 Ankara, Turkey. Electronic address: kayaalti@ankara.edu.tr.

Lead inhibits the delta-aminolevulinic acid dehydratase (ALAD) activity and results in neurotoxic aminolevulinic acid accumulation in the blood. During pregnancy, lead in the maternal blood can easily cross the placenta. The aim of this study was to determine whether the maternal ALAD G177C polymorphism (rs1800435) was related to the placental lead levels. The study population comprised 97 blood samples taken from mothers to investigate ALAD G177C polymorphism and their placentas to measure lead levels. ALAD G177C polymorphism was detected by standard polymerase chain reaction (PCR)-restriction fragment length polymorphism (RFLP) technique and atomic absorption spectrometry (AAS) equipped with a graphite furnace and Zeeman background correction system was used for lead determination. The median placental lead levels for ALAD1-1, ALAD1-2 and ALAD2-2 genotypes were 7.54 μg/kg, 11.78 μg/kg and 18.53 μg/kg, respectively. Statistically significant association was found between the maternal ALAD G177C polymorphism and placental lead levels (p<0.05). This study suggested that maternal ALAD G177C polymorphism was associated with placental lead levels.

UI MeSH Term Description Entries
D007854 Lead A soft, grayish metal with poisonous salts; atomic number 82, atomic weight 207.2, symbol Pb.
D010920 Placenta A highly vascularized mammalian fetal-maternal organ and major site of transport of oxygen, nutrients, and fetal waste products. It includes a fetal portion (CHORIONIC VILLI) derived from TROPHOBLASTS and a maternal portion (DECIDUA) derived from the uterine ENDOMETRIUM. The placenta produces an array of steroid, protein and peptide hormones (PLACENTAL HORMONES). Placentoma, Normal,Placentome,Placentas,Placentomes
D011247 Pregnancy The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH. Gestation,Pregnancies
D005260 Female Females
D005838 Genotype The genetic constitution of the individual, comprising the ALLELES present at each GENETIC LOCUS. Genogroup,Genogroups,Genotypes
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D000623 Porphobilinogen Synthase An enzyme that catalyzes the formation of porphobilinogen from two molecules of 5-aminolevulinic acid. EC 4.2.1.24. Aminolevulinate Hydro-Lyase,Aminolevulinic Acid Dehydratase,ALA-Dehydrase,delta-Aminolevulinate Dehydratase,delta-Aminolevulinic Acid Dehydratase,ALA Dehydrase,Acid Dehydratase, Aminolevulinic,Acid Dehydratase, delta-Aminolevulinic,Aminolevulinate Hydro Lyase,Dehydratase, Aminolevulinic Acid,Dehydratase, delta-Aminolevulinate,Dehydratase, delta-Aminolevulinic Acid,Hydro-Lyase, Aminolevulinate,Synthase, Porphobilinogen,delta Aminolevulinate Dehydratase,delta Aminolevulinic Acid Dehydratase
D056726 Genetic Association Studies The analysis of a sequence such as a region of a chromosome, a haplotype, a gene, or an allele for its involvement in controlling the phenotype of a specific trait, metabolic pathway, or disease. Candidate Gene Identification,Candidate Gene Analysis,Candidate Gene Association Studies,Candidate Gene Association Study,Gene Discovery,Genotype-Phenotype Association,Genotype-Phenotype Associations,Genotype-Phenotype Correlation,Genotype-Phenotype Correlations,Analyses, Candidate Gene,Analysis, Candidate Gene,Association Studies, Genetic,Association Study, Genetic,Association, Genotype-Phenotype,Associations, Genotype-Phenotype,Candidate Gene Analyses,Correlation, Genotype-Phenotype,Correlations, Genotype-Phenotype,Discovery, Gene,Gene Analyses, Candidate,Gene Analysis, Candidate,Gene Identification, Candidate,Genetic Association Study,Genotype Phenotype Association,Genotype Phenotype Associations,Genotype Phenotype Correlation,Genotype Phenotype Correlations,Identification, Candidate Gene,Studies, Genetic Association,Study, Genetic Association
D018811 Maternal Exposure Exposure of the female parent, human or animal, to potentially harmful chemical, physical, or biological agents in the environment or to environmental factors that may include ionizing radiation, pathogenic organisms, or toxic chemicals that may affect offspring. It includes pre-conception maternal exposure. Exposure, Maternal,Exposures, Maternal,Maternal Exposures

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