Excess caffeine exposure impairs eye development during chick embryogenesis.
Bottom Line: In addition, it perturbed the migration of HNK-1(+) cranial neural crest cells.Pax6 is an important gene that regulates eye development, so altering the expression of this gene might be the cause for the abnormal eye development.It causes asymmetrical microphthalmia to develop by increasing ROS production and perturbs Pax6 expression.
Affiliation: Department of Histology & Embryology, Key Laboratory for Regenerative Medicine of the Ministry of Education, Institute of Fetal-Preterm Labor Medicine, Medical College of Jinan University, Guangzhou, China.Show MeSH
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Mentions: It has been reported that caffeine could directly elevate intracellular oxidation stress [23,24]. Therefore, we investigated the level of ROS production and anti-oxidation ability in the context of the caffeine-treated eye, as shown schematically in Figure5A. Our results showed that ROS generation was significantly increased in 9-day chick embryo eye tissues after the 15 μmol/egg caffeine treatment (Fig.5B; Control = 23.90 ± 5.78 μ/s mg, caffeine-treated group = 43.94 ± 3.50 μ/s mg, N = 8; P < 0.01). Assay for MDA revealed that there was an increase for the caffeine-treated groups (Fig.5C; Control = 1.07 ± 0.16 nmol/mgprot, caffeine-treated group = 2.18 ± 0.70 nmol/mgprot, N = 8; P < 0.01). Similar result was observed for SOD activity, which is an anti-oxidation indicator (Fig.5D; Control = 5.16 ± 1.26 U/mgprot, caffeine = 13.78 ± 2.64 U/mgprot, N = 8; P < 0.01). All these data indicate that ROS accumulation correlates with caffeine-induced eye dysplasia.
Affiliation: Department of Histology & Embryology, Key Laboratory for Regenerative Medicine of the Ministry of Education, Institute of Fetal-Preterm Labor Medicine, Medical College of Jinan University, Guangzhou, China.