Is Emerging Nanomedicine a Friend or Foe to Germ Cells?

Area of Science:

• Reproductive Medicine
• Nanotechnology
• Toxicology

Background:

• Nanomaterials, particularly nanoparticles (NPs), are increasingly utilized in biomedicine.
• NPs possess unique physicochemical properties enabling applications in drug delivery, assisted reproductive technologies, in vitro culture, and diagnostics.
• However, NPs can accumulate in reproductive tissues, presenting potential risks to germ cells.

Purpose of the Study:

• To critically assess the dual role of nanoparticles (NPs) in reproductive medicine.
• To analyze the beneficial applications of NPs against their potential toxicity.
• To describe the mechanistic pathways of NP-induced toxicity in reproductive systems.

Main Methods:

• Systematic review of existing literature on NP applications and toxicity in reproductive medicine.
• Analysis of NP physicochemical properties influencing their biological effects.
• Examination of NP impact on oocyte and sperm function and quality.

Main Results:

• NPs can enhance assisted reproductive technologies, in vitro culture, and diagnostics.
• Evidence shows NPs can accumulate in reproductive tissues, inducing oxidative stress, DNA damage, and apoptosis.
• NP exposure can impair oocyte meiotic spindle assembly and sperm mitochondrial integrity.

Conclusions:

• Nanoparticles present a "double-edged sword" in reproductive medicine, offering benefits alongside risks.
• Understanding NP physicochemical properties is key to balancing therapeutic potential with toxicity.
• A safety-focused approach is essential for advancing reproductive nanomedicine.