title: Effects of whole-body exposure to 915 MHz RFID on secretory functions of the thyroid system in rats.
abstract: As a part of an investigation on the potential risks of radiofrequency identification (RFID) on human health, we studied whether exposure to 915 MHz RFID in rats significantly affected the secretory function of the thyroid system. A reverberation chamber was used as a whole-body exposure system. Male Sprague-Dawley rats were exposed for 8 h per day, 5 days per week, for a duration of 2, 4, 8, or 16 weeks. The estimated whole-body average specific absorption rate (SAR) varied from 3.2 to 4.6 W/kg depending on the age/mass of the animals for the field of the 915 MHz RFID reader. Plasma levels of triiodothyronine (T3), thyroxine (T4), and thyroid-stimulating hormone (TSH) were evaluated via enzyme-linked immunosorbent assay. Morphological changes in the thyroid gland were then analyzed. No changes in T3, T4, or TSH were observed over time between the sham- and RFID-exposed groups. We suggest that subchronic exposure to 915 MHz RFID at a SAR of 4 W/kg does not cause significant effects on thyroid secretory function.
authors.affiliation: Department of Neurosurgery, Ajou University School of Medicine, Suwon, Korea.
authors.forename: Hye Sun
authors.initials: HS
authors.lastname: Kim
authors.forename: Man-Jeong
authors.initials: MJ
authors.lastname: Paik
authors.forename: Yeon Ju
authors.initials: YJ
authors.lastname: Kim
authors.forename: Gwang
authors.initials: G
authors.lastname: Lee
authors.forename: Yun-Sil
authors.initials: YS
authors.lastname: Lee
authors.forename: Hyung-Do
authors.initials: HD
authors.lastname: Choi
authors.forename: Byung Chan
authors.initials: BC
authors.lastname: Kim
authors.forename: Jeong-Ki
authors.initials: JK
authors.lastname: Pack
authors.forename: Nam
authors.initials: N
authors.lastname: Kim
authors.forename: Young Hwan
authors.initials: YH
authors.lastname: Ahn
mesh_terms: D000818:Animals; D001831:Body Temperature / Q000528:radiation effects; D001835:Body Weight / Q000528:radiation effects; D008297:Male; D011846:Radio Waves / Q000009:adverse effects*; D051381:Rats; D017207:Rats, Sprague-Dawley; D013961:Thyroid Gland / Q000378:metabolism* / Q000528:radiation effects*; D013963:Thyroid Hormones / Q000097:blood; D014916:Whole-Body Irradiation / Q000009:adverse effects*
chemical_list: D013963:Thyroid Hormones
keywords: RFID; thyroid hormone; thyroid-stimulating hormone