Does Microwave Exposure at Different Doses in the Pre/Postnatal Period Affect Growing Rat Bone Development?

Area of Science:

• Biophysics
• Developmental Biology
• Orthopedics

Background:

• The impact of 2.45 GHz continuous wave (CW) Wireless-Fidelity (Wi-Fi) microwave (MW) irradiation on bone development is not well understood.
• Electromagnetic fields (EMF) are ubiquitous, necessitating research into their biological effects, particularly during critical developmental periods.

Purpose of the Study:

• To investigate the effects of pre/postnatal 2.45 GHz CW-MW irradiation on bone formation and resorption.
• To analyze biochemical and histological changes in serum and tibia bone tissues of growing rats exposed to EMF.

Main Methods:

• Six groups of male rats were established, with five experimental groups exposed to varying EMF levels (10 V/m and 15 V/m) from fertilization through postnatal day 45.
• Biochemical assays were performed to measure Receptor Activator Nuclear factor-kB (RANK), soluble Receptor Activator of Nuclear factor-kB Ligand (sRANKL), and Osteoprotegerin (OPG).
• Histological examination of tibia tissues was conducted to complement biochemical findings.

Main Results:

• No significant differences in RANK levels were observed between control and experimental groups.
• A statistically significant increase in sRANKL and OPG levels was noted in rats exposed to 10 V/m and 15 V/m EMF.
• Histological findings corroborated the biochemical results, indicating EMF-induced alterations in bone tissue.

Conclusions:

• Pre/postnatal exposure to 2.45 GHz EMF at 10 V/m and 15 V/m potentially influences bone development in growing rats.
• The observed increases in sRANKL and OPG suggest that MW irradiation may affect bone remodeling processes.