Exposure to urban PM1 in rats: development of bronchial inflammation and airway hyperresponsiveness

Filep, A ✉ [Filep, Ágnes (környezettudomány), szerző] Optikai és Kvantumelektronikai Tanszék (SZTE / TTIK / FI); MTA-SZTE Fotoakusztikus Kutatócsoport (SZTE / TTIK / FI / OKET); Fodor, GH* ✉ [Fodor, Gergely (Légzésélettan), szerző] Orvosi Fizikai és Orvosi Informatikai Intézet (SZTE / ÁOK); Kun-Szabo, F [Kun-Szabó, Fruzsina (Környezettudomány), szerző]; Tiszlavicz, L [Tiszlavicz, László (Pathológia), szerző] Pathológiai Intézet (SZTE / ÁOK); Razga, Z [Rázga, Zsolt (Farmakológia, fun...), szerző] Pathológiai Intézet (SZTE / ÁOK); Bozso, G [Bozsó, Gábor (Geokémia), szerző] Ásványtani, Geokémiai és Kőzettani Tanszék (SZTE / TTIK / FFI); Bozoki, Z [Bozóki, Zoltán (Lézerfizika), szerző] MTA-SZTE Fotoakusztikus Kutatócsoport (SZTE / TTIK / FTCS / OKET); Optikai és Kvantumelektronikai Tanszék (SZTE / TTIK / FI); Szabo, G [Szabó, Gábor (Kvantumelektronika), szerző] Optikai és Kvantumelektronikai Tanszék (SZTE / TTIK / FI); MTA-SZTE Fotoakusztikus Kutatócsoport (SZTE / TTIK / FI / OKET); Petak, F [Peták, Ferenc (Légzésélettan), szerző] Orvosi Fizikai és Orvosi Informatikai Intézet (SZTE / ÁOK)

Angol nyelvű Tudományos Szakcikk (Folyóiratcikk)
Megjelent: RESPIRATORY RESEARCH 1465-9921 1465-993X 17 (1) Paper: 26 , 11 p. 2016
  • SJR Scopus - Pulmonary and Respiratory Medicine: Q1
    BACKGROUND: Several epidemiological and laboratory studies have evidenced the fact that atmospheric particulate matter (PM) increases the risk of respiratory morbidity. It is well known that the smallest fraction of PM (PM1 - particulate matter having a diameter below 1 mum) penetrates the deepest into the airways. The ratio of the different size fractions in PM is highly variable, but in industrial areas PM1 can be significant. Despite these facts, the health effects of PM1 have been poorly investigated and air quality standards are based on PM10 and PM2.5 (PM having diameters below 10 mum and 2.5 mum, respectively) concentrations. Therefore, this study aimed at determining whether exposure to ambient PM1 at a near alert threshold level for PM10 has respiratory consequences in rats. METHODS: Rats were either exposed for 6 weeks to 100 mug/m(3) (alert threshold level for PM10 in Hungary) urban submicron aerosol, or were kept in room air. End-expiratory lung volume, airway resistance (Raw) and respiratory tissue mechanics were measured. Respiratory mechanics were measured under baseline conditions and following intravenous methacholine challenges to characterize the development of airway hyperresponsiveness (AH). Bronchoalveolar lavage fluid (BALF) was analyzed and lung histology was performed. RESULTS: No significant differences were detected in lung volume and mechanical parameters at baseline. However, the exposed rats exhibited significantly greater MCh-induced responses in Raw, demonstrating the progression of AH. The associated bronchial inflammation was evidenced by the accumulation of inflammatory cells in BALF and by lung histology. CONCLUSIONS: Our findings suggest that exposure to concentrated ambient PM1 (mass concentration at the threshold level for PM10) leads to the development of mild respiratory symptoms in healthy adult rats, which may suggest a need for the reconsideration of threshold limits for airborne PM1.
    Hivatkozás stílusok: IEEEACMAPAChicagoHarvardCSLMásolásNyomtatás
    2020-10-27 04:37