Di-butyl phthalate (DBP) induces craniofacial defects during embryonic development in zebrafish

Area of Science:

• Environmental Science
• Developmental Toxicology
• Endocrinology

Background:

• Di-butyl phthalate (DBP) is a widely used plasticizer found in numerous consumer products.
• DBP is detected at high levels in environmental samples, leading to its classification as a priority pollutant by regulatory agencies.
• While DBP's endocrine-disrupting effects are known, its developmental toxicity during critical embryonic periods remains understudied.

Purpose of the Study:

• To investigate the developmental toxicity of Di-butyl phthalate (DBP) exposure during early embryonic development.
• To identify specific craniofacial defects induced by DBP during critical developmental windows.

Main Methods:

• Exposure of developing embryos to Di-butyl phthalate (DBP).
• Assessment of craniofacial development, including cranial size and intraocular distance.
• Detailed analysis of jawbone development, cartilage organization, vascular innervation, and neuronal patterning.

Main Results:

• DBP exposure led to a decrease in overall cranial size in treated embryos.
• An increase in intraocular distance was observed in DBP-exposed embryos compared to controls.
• Significant defects in jawbone cartilage development, vascular innervation, and neuronal patterning were identified.

Conclusions:

• Exposure to Di-butyl phthalate (DBP) during critical embryonic development windows is toxic to craniofacial development.
• DBP disrupts normal craniofacial morphogenesis, leading to observable defects in skeletal and neural patterning.