[Influence of electromagnetic radiation on raf kinase inhibitor protein and its related proteins of hippocampus].

Zhonghua lao dong wei sheng zhi ye bing za zhi = Zhonghua laodong weisheng zhiyebing zazhi = Chinese journal of industrial hygiene and occupational diseases · 2008 · Harm · Low evidence

← Research stream

HarmLow evidencePaper 2783

Study snapshot

PublicationZhonghua lao dong wei sheng zhi ye bing za zhi = Zhonghua laodong weisheng zhiyebing zazhi = Chinese journal of industrial hygiene and occupational diseases · 2008

Study typeanimal

Reported directionHarm

Evidence ratingLow

Abstract

OBJECTIVE: To study the development of changes for Raf kinase inhibitor protein (RKIP) and its mRNA in rats hippocampus after electromagnetic radiation. METHODS: Rats were exposed to X-band high power microwave (X-HPM), S-band high power microwave (S-HPM) and electromagnetic pulse (EMP) radiation source respectively. The animal model of electromagnetic radiation was established. Western blot was used to detect the expression of RKIP, and RT-PCR was applied to detect the expression of RKIP mRNA. The interaction of RKIP and Raf-1 was measured with co-immunoprecipitation method, and the expression of cerebral choline acetyltransferase (CHAT) was measured by immunohistochemistry. RESULTS: The expression of RKIP significantly down-regulated at 6 h after radiation, and recovered at 1 d in group EMP, but the down-regulation continued during 1 approximately 7 d after radiation in the two microwave groups. The expression of RKIP mRNA changed wavily during 6 h approximately 7 d after radiation, which showed down-regulation at 6 h, and up-regulation at 3 d. The interaction of RKIP and Raf-1 decreased during 6 h approximately 7 d after radiation, most significantly at 7 d, and the two microwave groups were more significant. The expression of CHAT decreased continuously during 6 h approximately 7 d after radiation, and generally recovered on 14 d. CONCLUSION: The down-regulation of RKIP and its related proteins of hippocampus is induced by electromagnetic radiation.

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 typeanimal

Effect directionharm

PopulationRats (hippocampus)

Sample sizeNot supplied

Exposuremicrowave · 6 h to 14 d post-exposure time course (exposure duration not stated)

Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

RKIP protein expression was significantly down-regulated at 6 h after radiation; it recovered by 1 d in the EMP group but remained down-regulated from ~1 to 7 d in both microwave groups. RKIP mRNA showed a wavelike pattern from 6 h to 7 d (down at 6 h, up at 3 d). RKIP–Raf-1 interaction decreased from 6 h to 7 d (most at 7 d), with larger decreases in the microwave groups. CHAT expression decreased continuously from 6 h to 7 d and generally recovered by 14 d.

Outcomes measured

RKIP protein expression (Western blot)
RKIP mRNA expression (RT-PCR)
RKIP–Raf-1 interaction (co-immunoprecipitation)
Cerebral choline acetyltransferase (CHAT) expression (immunohistochemistry)

Limitations

Sample size not reported in abstract
Exposure metrics (frequency, power density/SAR, exposure duration) not reported in abstract
No behavioral/functional outcomes described in abstract

View raw extracted JSON

{
  "study_type": "animal",
  "exposure": {
    "band": "microwave",
    "source": "X-band high power microwave (X-HPM); S-band high power microwave (S-HPM); electromagnetic pulse (EMP)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "6 h to 14 d post-exposure time course (exposure duration not stated)"
  },
  "population": "Rats (hippocampus)",
  "sample_size": null,
  "outcomes": [
    "RKIP protein expression (Western blot)",
    "RKIP mRNA expression (RT-PCR)",
    "RKIP–Raf-1 interaction (co-immunoprecipitation)",
    "Cerebral choline acetyltransferase (CHAT) expression (immunohistochemistry)"
  ],
  "main_findings": "RKIP protein expression was significantly down-regulated at 6 h after radiation; it recovered by 1 d in the EMP group but remained down-regulated from ~1 to 7 d in both microwave groups. RKIP mRNA showed a wavelike pattern from 6 h to 7 d (down at 6 h, up at 3 d). RKIP–Raf-1 interaction decreased from 6 h to 7 d (most at 7 d), with larger decreases in the microwave groups. CHAT expression decreased continuously from 6 h to 7 d and generally recovered by 14 d.",
  "effect_direction": "harm",
  "limitations": [
    "Sample size not reported in abstract",
    "Exposure metrics (frequency, power density/SAR, exposure duration) not reported in abstract",
    "No behavioral/functional outcomes described in abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "electromagnetic radiation",
    "high power microwave",
    "X-band",
    "S-band",
    "electromagnetic pulse",
    "rat",
    "hippocampus",
    "RKIP",
    "Raf-1",
    "choline acetyltransferase",
    "Western blot",
    "RT-PCR",
    "co-immunoprecipitation",
    "immunohistochemistry"
  ],
  "suggested_hubs": [
    {
      "slug": "rf-health-effects",
      "weight": 0.78,
      "reason": "Animal study examining hippocampal molecular changes after microwave/EMP radiation."
    },
    {
      "slug": "military-radar-microwave",
      "weight": 0.55,
      "reason": "High-power X-band/S-band microwave exposures are consistent with radar-like/military-relevant sources."
    }
  ]
}

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: Not supplied
PubMed: 19309582

Read the original paper →

Related papers

← Back to the Research Library