OBJECTIVE: To examine the association between prenatal exposure to nicotine from tobacco smoke and infant neurobehavior using tobacco biomarkers and a sensitive and comprehensive measure of infant neurobehavior. STUDY DESIGN: Participants were 318 infants (206 White, 95 Black, 17 Other) and their mothers. Prenatal tobacco smoke exposure was measured twice during pregnancy and once at delivery using maternal serum cotinine. Infant neurobehavior was assessed with the NICU Network Neurobehavioral Scale at approximately 5 weeks after birth. RESULTS: Prenatal tobacco smoke exposure was significantly associated with infant neurobehavior after controlling for important covariates, but the specific behaviors associated with exposure varied by race. In White infants, higher cotinine was associated with increased arousal (p=.030) and excitability (p=.034), and decreased self-regulation (p=.010). In contrast, among Black infants, higher cotinine was associated with decreased arousal (p=.001), excitability (p=.021), and special handling required to complete the assessment (p=.003), and increased self-regulation (p=.021) and hypotonicity (p=.016). In secondary analyses, we found racial differences in the effects of postnatal exposure to second hand smoke and low-level prenatal exposure. CONCLUSIONS: Low-level prenatal tobacco smoke exposure is associated with infant neurobehavior at 5 weeks of age, but the specific effects differ by race. These effects may reflect racial differences in nicotine metabolism that are similar to differences reported in adult and child studies of tobacco.
OBJECTIVE: To examine the association between prenatal exposure to nicotine from tobacco smoke and infant neurobehavior using tobacco biomarkers and a sensitive and comprehensive measure of infant neurobehavior. STUDY DESIGN:Participants were 318 infants (206 White, 95 Black, 17 Other) and their mothers. Prenatal tobacco smoke exposure was measured twice during pregnancy and once at delivery using maternal serum cotinine. Infant neurobehavior was assessed with the NICU Network Neurobehavioral Scale at approximately 5 weeks after birth. RESULTS: Prenatal tobacco smoke exposure was significantly associated with infant neurobehavior after controlling for important covariates, but the specific behaviors associated with exposure varied by race. In White infants, higher cotinine was associated with increased arousal (p=.030) and excitability (p=.034), and decreased self-regulation (p=.010). In contrast, among Black infants, higher cotinine was associated with decreased arousal (p=.001), excitability (p=.021), and special handling required to complete the assessment (p=.003), and increased self-regulation (p=.021) and hypotonicity (p=.016). In secondary analyses, we found racial differences in the effects of postnatal exposure to second hand smoke and low-level prenatal exposure. CONCLUSIONS: Low-level prenatal tobacco smoke exposure is associated with infant neurobehavior at 5 weeks of age, but the specific effects differ by race. These effects may reflect racial differences in nicotine metabolism that are similar to differences reported in adult and child studies of tobacco.
Authors: Laura R Stroud; George D Papandonatos; Meaghan McCallum; Tessa Kehoe; Amy L Salisbury; Marilyn A Huestis Journal: Neurotoxicol Teratol Date: 2018-09-26 Impact factor: 3.763
Authors: Laura R Stroud; George D Papandonatos; Daniel Rodriguez; Meaghan McCallum; Amy L Salisbury; Maureen G Phipps; Barry Lester; Marilyn A Huestis; Raymond Niaura; James F Padbury; Carmen J Marsit Journal: Psychoneuroendocrinology Date: 2014-05-29 Impact factor: 4.905
Authors: Simon Rückinger; Peter Rzehak; Chih-Mei Chen; Stefanie Sausenthaler; Sibylle Koletzko; Carl-Peter Bauer; Ute Hoffmann; Ursula Kramer; Dietrich Berdel; Andrea von Berg; Otmar Bayer; H-Erich Wichmann; Rüdiger von Kries; Joachim Heinrich Journal: Environ Health Perspect Date: 2010-01 Impact factor: 9.031