RF Safe

Acute exposure to low-level CW and GSM-modulated 900 MHz radiofrequency does not affect Ba 2+ currents through voltage-gated calcium channels in rat cortical neurons.

Bioelectromagnetics · 2007 · No effect · Low evidence

← Research stream
No effectLow evidencePaper 5058

In patch-clamp recordings from primary cultures of rat cortical neurons, acute exposure (1–3 × 90 s) to 900 MHz RF-EMF (CW or GSM-modulated) at SAR 2 W/kg did not significantly change Ba2+ current amplitude or the current–voltage relationship through VGCC.

Study snapshot

PublicationBioelectromagnetics · 2007
Study typein_vitro
Reported directionNo effect
Evidence ratingLow

Abstract

We have studied the non-thermal effects of radiofrequency (RF) electromagnetic fields (EMFs) on Ba(2+) currents (I Ba 2+) through voltage-gated calcium channels (VGCC), recorded in primary cultures of rat cortical neurons using the patch-clamp technique. To assess whether low-level acute RF field exposure could modify the amplitude and/or the voltage-dependence of I Ba 2+, Petri dishes containing cultured neurons were exposed for 1-3 periods of 90 s to 900 MHz RF-EMF continuous wave (CW) or amplitude-modulated according to global system mobile communication standard (GSM) during whole-cell recording. The specific absorption rates (SARs) were 2 W/kg for CW and 2 W/kg (time average value) for GSM-modulated signals, respectively. The results obtained indicate that single or multiple acute exposures to either CW or GSM-modulated 900 MHz RF-EMFs do not significantly alter the current amplitude or the current-voltage relationship of I Ba 2+, through VGCC.

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typein_vitro
Effect directionno_effect
PopulationPrimary cultures of rat cortical neurons
Sample sizeNot supplied
ExposureRF · 900 MHz · 2 W/kg · 1–3 periods of 90 s (acute)
Evidence strengthLowConfidence: 78% · Peer reviewed: yes

Main findings

In patch-clamp recordings from primary cultures of rat cortical neurons, acute exposure (1–3 × 90 s) to 900 MHz RF-EMF (CW or GSM-modulated) at SAR 2 W/kg did not significantly change Ba2+ current amplitude or the current–voltage relationship through VGCC.

Outcomes measured

  • Ba2+ currents (IBa2+) through voltage-gated calcium channels (VGCC)
  • Current amplitude
  • Current–voltage relationship (voltage-dependence)

Limitations

  • In vitro primary neuron culture model (not in vivo)
  • Acute exposure only (1–3 × 90 s)
  • Sample size not reported in abstract
View raw extracted JSON
{
  "study_type": "in_vitro",
  "exposure": {
    "band": "RF",
    "source": null,
    "frequency_mhz": 900,
    "sar_wkg": 2,
    "duration": "1–3 periods of 90 s (acute)"
  },
  "population": "Primary cultures of rat cortical neurons",
  "sample_size": null,
  "outcomes": [
    "Ba2+ currents (IBa2+) through voltage-gated calcium channels (VGCC)",
    "Current amplitude",
    "Current–voltage relationship (voltage-dependence)"
  ],
  "main_findings": "In patch-clamp recordings from primary cultures of rat cortical neurons, acute exposure (1–3 × 90 s) to 900 MHz RF-EMF (CW or GSM-modulated) at SAR 2 W/kg did not significantly change Ba2+ current amplitude or the current–voltage relationship through VGCC.",
  "effect_direction": "no_effect",
  "limitations": [
    "In vitro primary neuron culture model (not in vivo)",
    "Acute exposure only (1–3 × 90 s)",
    "Sample size not reported in abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "radiofrequency",
    "900 MHz",
    "GSM modulation",
    "continuous wave",
    "SAR 2 W/kg",
    "patch clamp",
    "rat cortical neurons",
    "voltage-gated calcium channels",
    "Ba2+ currents",
    "non-thermal effects"
  ],
  "suggested_hubs": []
}
AI can be wrong. Always verify against the paper.

AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1002/bem.20345
PubMed: 17620299

Read the original paper →

Related papers

← Back to the Research Library