Effects of wireless local area network exposure on testicular morphology and VEGF levels.

Abstract

This study investigated the effects of exposure to a 2.45 GHz electromagnetic field (EMF) on rat testicular tissue, focusing on histological alterations and the potential activation of the HIF1A-VEGF pathway. Twenty-four adult male albino Wistar rats were divided into a control group ( = 12) with no EMF exposure and an experimental group ( = 12) exposed to 2.45 GHz microwave radiation (3 V/m, SAR 0.00208 W/kg) for one hour daily over 60 days. Following the exposure period, testicular tissues were analyzed for histopathological changes, VEGFA and HIF1A gene expression levels, and VEGFA protein concentration. In rat testicular tissue, while VEGFA gene expression ( < 0.05) and protein levels ( < 0.001) increased in the EMF group, no significant change was detected in HIF1A gene expression levels in the EMF group compared to the control group. Histological examination revealed a significant reduction in seminiferous tubule diameter ( < 0.001), epithelial thickness ( < 0.001), tubule density ( < 0.001), and Sertoli cell count ( = 0.0098) in the EMF-exposed group. It may be concluded that EMF at 2.45 GHz increases HIF1A-independent VEGF levels, and EMF exposure may cause testicular damage by increasing VEGF gene expression levels.

AI evidence extraction

Main findings

Compared with controls, rats exposed to 2.45 GHz EMF (3 V/m; SAR 0.00208 W/kg) for 1 hour/day for 60 days showed increased VEGFA gene expression and VEGFA protein levels, with no significant change in HIF1A gene expression. Histology showed reduced seminiferous tubule diameter, epithelial thickness, tubule density, and Sertoli cell count in the exposed group.

Outcomes measured

• Testicular histopathology/morphology (seminiferous tubule diameter, epithelial thickness, tubule density, Sertoli cell count)
• VEGFA gene expression
• HIF1A gene expression
• VEGFA protein concentration

Limitations

• Animal study (rat model); generalizability to humans not established in abstract
• Only one exposure condition reported (2.45 GHz; 3 V/m; specific SAR)
• Mechanistic inference (HIF1A-independent pathway) based on limited markers (HIF1A/VEGFA) as described in abstract

Suggested hubs

• school-wi-fi (0.55)
  Exposure described as wireless local area network (2.45 GHz), commonly associated with Wi‑Fi.

{
    "study_type": "animal",
    "exposure": {
        "band": "microwave",
        "source": "wireless local area network",
        "frequency_mhz": 2450,
        "sar_wkg": 0.0020799999999999998177846460833961828029714524745941162109375,
        "duration": "1 hour daily for 60 days"
    },
    "population": "Adult male albino Wistar rats",
    "sample_size": 24,
    "outcomes": [
        "Testicular histopathology/morphology (seminiferous tubule diameter, epithelial thickness, tubule density, Sertoli cell count)",
        "VEGFA gene expression",
        "HIF1A gene expression",
        "VEGFA protein concentration"
    ],
    "main_findings": "Compared with controls, rats exposed to 2.45 GHz EMF (3 V/m; SAR 0.00208 W/kg) for 1 hour/day for 60 days showed increased VEGFA gene expression and VEGFA protein levels, with no significant change in HIF1A gene expression. Histology showed reduced seminiferous tubule diameter, epithelial thickness, tubule density, and Sertoli cell count in the exposed group.",
    "effect_direction": "harm",
    "limitations": [
        "Animal study (rat model); generalizability to humans not established in abstract",
        "Only one exposure condition reported (2.45 GHz; 3 V/m; specific SAR)",
        "Mechanistic inference (HIF1A-independent pathway) based on limited markers (HIF1A/VEGFA) as described in abstract"
    ],
    "evidence_strength": "low",
    "confidence": 0.85999999999999998667732370449812151491641998291015625,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "2.45 GHz",
        "microwave radiation",
        "WLAN",
        "Wi-Fi",
        "testis",
        "testicular morphology",
        "histopathology",
        "VEGFA",
        "HIF1A",
        "Sertoli cells",
        "SAR"
    ],
    "suggested_hubs": [
        {
            "slug": "school-wi-fi",
            "weight": 0.5500000000000000444089209850062616169452667236328125,
            "reason": "Exposure described as wireless local area network (2.45 GHz), commonly associated with Wi‑Fi."
        }
    ]
}

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