Microplastics as Vectors Influencing Oxidative Stress, Inflammation, and Endocrine Function During Early Development

Area of Science:

• Environmental Toxicology
• Developmental Biology
• Polymer Science

Background:

• Microplastics and nanoplastics (MNPLs) are emerging environmental contaminants.
• MNPLs act as vectors for metals, pesticides, and pharmaceuticals.
• Early developmental stages are uniquely vulnerable to MNPL exposure.

Purpose of the Study:

• To review the impact of MNPL-contaminant complexes on early development.
• To examine effects on oxidative stress, inflammation, and endocrine function.
• To highlight the role of MNPLs in developmental toxicology.

Main Methods:

• Narrative review of literature from PubMed, Scopus, Web of Science, and Google Scholar.
• Focused on physicochemical properties, sorption, gut barrier, and developmental toxicology.
• Synthesized evidence from polymer chemistry, contaminant behavior, and developmental physiology.

Main Results:

• MNPLs facilitate uptake and distribution in developing organisms.
• Particle-contaminant complexes induce oxidative stress and DNA damage.
• MNPLs trigger inflammatory responses and disrupt epithelial homeostasis.
• Endocrine function is impaired by transported chemicals and MNPL-induced mechanisms.
• These effects are amplified by sorbed pollutants.

Conclusions:

• MNPLs act as biologically active vectors during early development.
• Particle-contaminant interactions exacerbate oxidative, inflammatory, and endocrine disturbances.
• Early-life risk assessments must consider MNPL-contaminant complexes.