title: Influence of genetic polymorphisms on bone disease of preterm infants.
abstract: Bone disease is an important complication among very low birth weight (VLBW, <1500 g) infants. In adults, osteoporosis is associated with polymorphisms of vitamin D receptor (VDR), estrogen receptor (ER), and collagen Ialpha1 (COLIA1) genes. However, limited information is available regarding the role of these polymorphisms in bone disease in premature infants. We have investigated the possible association between bone disease and the allelic polymorphisms of these three genes in 65 VLBW infants. Twenty infants (30.8%) were diagnosed with bone disease based on high activity of bone formation (serum alkaline phosphatase and osteocalcin), bone resorption (urinary excretion of calcium and pyridinium crosslink) markers, and positive radiologic signs. Statistically significant correlation between thymine-adenine repeat [(TA)(n)] allelic variant of ER gene and bone disease was observed. Infants without bone disorder more often carried a high number of repeats [(TA)(n) >18] [odds ratio (OR): 0.17, 95% confidence interval (CI): 0.05-0.55]. A low number of repeats [(TA)(n) <19] was found more frequently in infants suffering from bone disease (OR: 6.00, 95% CI: 1.77-20.31). Significant interaction (p = 0.009) between VDR and COLIA1 genotypes was observed. In a logistic regression model, bone disorder of preterms significantly correlated with male gender (p = 0.002), lower gestational age (p = 0.015), homozygous allelic variants of high number of (TA)(n) repeats (p = 0.006), and interaction between VDR and COLIA1 genotype (p = 0.009).
authors.affiliation: Department of Obstetrics and Gynecology, Medical School, University of Pécs, 7624 Pécs, Hungary. simone.funke@aok.pte.hu
authors.forename: Simone
authors.initials: S
authors.lastname: Funke
authors.forename: Eva
authors.initials: E
authors.lastname: Morava
authors.forename: Márta
authors.initials: M
authors.lastname: Czakó
authors.forename: Gabriella
authors.initials: G
authors.lastname: Vida
authors.forename: Tibor
authors.initials: T
authors.lastname: Ertl
authors.forename: György
authors.initials: G
authors.lastname: Kosztolányi
mesh_terms: D000328:Adult; D000469:Alkaline Phosphatase / Q000097:blood; D015415:Biomarkers; D001847:Bone Diseases / Q000235:genetics*; D002118:Calcium / Q000652:urine; D024042:Collagen Type I / Q000652:urine; D047628:Estrogen Receptor alpha / Q000235:genetics / Q000378:metabolism; D005260:Female; D020022:Genetic Predisposition to Disease; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D019102:Infant, Very Low Birth Weight; D008297:Male; D015675:Osteocalcin / Q000097:blood; D010024:Osteoporosis / Q000235:genetics*; D010455:Peptides / Q000652:urine; D010865:Pilot Projects; D011110:Polymorphism, Genetic; D011247:Pregnancy; D012044:Regression Analysis; D012307:Risk Factors
chemical_list: D015415:Biomarkers; D024042:Collagen Type I; D047628:Estrogen Receptor alpha; D010455:Peptides; C052929:collagen type I trimeric cross-linked peptide; D015675:Osteocalcin; D000469:Alkaline Phosphatase; D002118:Calcium