title: Effects of 10-T static magnetic field on human peripheral blood immune cells.
abstract: The exposure of peripheral blood mononuclear cells (PBMCs) was performed in a 10-T static magnetic field. Without lymphocyte stimulation, there were no significant differences in the viability of the exposed and unexposed CD4(+) T cells, CD8(+) T cells, B cells, and natural killer (NK) cells. The expression of Th1 type chemokine receptor, CXCR3, and Th2 type receptor, CCR3, was unaltered after magnetic-field exposure. No differences were observed in the naive T cells and memory T-cell subclasses in either CD4(+) or CD8(+) T cells. In contrast to the unstimulated condition, the magnetic-field exposure reduced the viability of phytohemagglutinin (PHA)-activated T cells in both the CD4(+) and CD8(+) subclasses. In particular, the number of PHA-treated naive CD8(+) T cells (CD45RA(+)CD4(-)CD8(+)) was markedly decreased after the magnetic-field exposure, while PHA-treated memory CD8(+) cells (CD45RA(-)CD4(-)CD8(+)) were resistant to the exposure. The number of PHA-treated naive CD4(+) T cells (CD45RA(+)CD4(+)CD8(-)) and memory cells (CD45RA(-)CD4(+)CD8(-)) was markedly decreased to a similar degree. Thus the susceptibility of lymphocytes to the magnetic-field exposure differed among activated T-cell subtypes. The magnetic-field exposure significantly increased the death of PHA-stimulated lymphocytes by apoptosis. These results suggest that a strong static magnetic field has acute effects on immune cells during cell division, while the field exposure has a minimal effect on immune cells in a nondividing phase.
authors.affiliation: Department of Neurology, Tohoku University School of Medicine, Sendai, Japan. honodera@neurol.med.tohoku.ac.jp
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Onodera
authors.forename: Zhe
authors.initials: Z
authors.lastname: Jin
authors.forename: Susumu
authors.initials: S
authors.lastname: Chida
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Suzuki
authors.forename: Hideaki
authors.initials: H
authors.lastname: Tago
authors.forename: Yasuto
authors.initials: Y
authors.lastname: Itoyama
mesh_terms: D000328:Adult; D017209:Apoptosis / Q000528:radiation effects; D002470:Cell Survival / Q000528:radiation effects; D004574:Electromagnetic Fields; D005260:Female; D006801:Humans; D007963:Leukocytes, Mononuclear / Q000528:radiation effects*; D008213:Lymphocyte Activation / Q000528:radiation effects; D008280:Magnetics; D008297:Male; D010835:Phytohemagglutinins
chemical_list: D010835:Phytohemagglutinins