Effects of static magnetic fields on plasma levels of angiotensin II and aldosterone associated with arterial blood pressure in genetically hypertensive rats

✍ Scribed by Hideyuki Okano; Chiyoji Ohkubo

• Publisher: John Wiley and Sons
• Year: 2003
• Tongue: English
• Weight: 180 KB
• Volume: 24
• Category: Article
• ISSN: 0197-8462
• DOI: 10.1002/bem.10139

✦ Synopsis

Abstract

Effects of static magnetic fields (SMFs) on development of hypertension were investigated using young male, stroke resistant, spontaneously hypertensive rats (SHRs) beginning at 7 weeks of age. SHRs were randomly assigned to two different exposure groups or an unexposed group. The SHRs in the exposure groups were constantly exposed to two different types of external SMFs of 3.0–10.0 mT or 8.0–25.0 mT for 12 weeks. The SMFs were generated from permanent magnetic plates attached to the rat cage. The blood pressure (BP) of each rat was determined at weekly intervals using indirect tail‐cuff method. The SMFs suppressed and retarded the development of hypertension in both exposed groups to a statistically significant extent for several weeks, as compared with an unexposed group. The antipressor effects were related to the extent of reduction in plasma levels of angiotensin II and aldosterone in the SHRs. These results suggest that the SMFs of mT intensities with spatial gradients could be attributable to suppression of early BP elevation via hormonal regulatory system. Bioelectromagnetics 24:403–412, 2003. © 2003 Wiley‐Liss, Inc.