Magnetite in human tissues: A mechanism for the biological effects of weak ELF magnetic fields

Journal Article · Wed Jan 01 00:00:00 EST 1992 · Bioelectromagnetics (New York); (United States)

DOI:https://doi.org/10.1002/bem.2250130710· OSTI ID:6702339

Kirschvink, J L; Kobayashi-Kirschvink, A; Diaz-Ricci, J C; Kirschvink, S J ^[1]

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1. California Institute of Technology, Pasadena (United States)

Due to the apparent lack of a biophysical mechanism, the question of whether weak, low-frequency magnetic fields are able to influence living organisms has long been one of the most controversial subjects in any field of science. However, two developments during the past decade have changed this perception dramatically, the first being the discovery that many organisms, including humans, biochemically precipitate the ferrimagnetic mineral magnetite (Fe3O4). In the magnetotactic bacteria, the geomagnetic response is based on either biogenic magnetite or greigite (Fe3S4), and reasonably good evidence exists that this is also the case in higher animals such as the honey bee. Second, the development of simple behavioral conditioning experiments for training honey bees to discriminate magnetic fields demonstrates conclusively that at least one terrestrial animal is capable of detecting earth-strength magnetic fields through a sensory process. In turn, the existence of this ability implies the presence of specialized receptors which interact at the cellular level with weak magnetic fields in a fashion exceeding thermal noise. A simple calculation shows that magnetosomes moving in response to earth-strength ELF fields are capable of opening trans-membrane ion channels, in a fashion similar to those predicted by ionic resonance models. Hence, the presence of trace levels of biogenic magnetite in virtually all human tissues examined suggests that similar biophysical processes may explain a variety of weak field ELF bioeffects. 61 refs.

• OSTI ID: 6702339
• Journal Information: Bioelectromagnetics (New York); (United States), Vol. 1; ISSN 0197-8462
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
59 BASIC BIOLOGICAL SCIENCES
ELECTROMAGNETIC FIELDS
BIOLOGICAL EFFECTS
ENVIRONMENTAL EXPOSURE
MAGNETITE
BIOCHEMICAL REACTION KINETICS
TISSUE DISTRIBUTION
BACTERIA
BEES
BIOLOGICAL PATHWAYS
IRON
OXIDES
ANIMALS
ARTHROPODS
CHALCOGENIDES
DISTRIBUTION
ELEMENTS
HYMENOPTERA
INSECTS
INVERTEBRATES
IRON ORES
KINETICS
METALS
MICROORGANISMS
MINERALS
ORES
OXIDE MINERALS
OXYGEN COMPOUNDS
REACTION KINETICS
TRANSITION ELEMENTS
560400* - Other Environmental Pollutant Effects
550500 - Metabolism