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"Bisphenol A (4,4’-isopropildenadifenol atau 2,2-bis(4-hidroksifenil)-propana) adalah senyawa kimia yang digunakan untuk produksi plastik polikarbonat dan resin epoksi. BPA berpotensi mengakibatkan kerusakan DNA oksidatif akibat terjadinya stres oksidatif dengan membentuk spesies oksigen reaktif. Penelitian ini dilakukan untuk menganalisis pembentukan 8-OHdG sebagai biomarker kerusakan DNA/gen yang disebabkan paparan senyawa kimia BPA. Studi in vitro dilakukan dengan mereaksikan 2’-deoksiguanosin dengan BPA, logam Ni (II), logam Pb (II), dan hidrogen peroksida melalui reaksi fenton-like dengan variasi pH (7,4 dan 8,4), suhu (37°C dan 60°C), dan waktu inkubasi (24 jam dan 30 jam). Analisis pembentukan 8-OHdG pada studi ini dilakukan menggunakan instrumen HPLC kromatografi fase terbalik dengan detektor UV. Pada studi biomonitoring, dilakukan d pengambilan sampel urin balita pengguna botol susu plastik. Analisis pembentukan 8-OHdG pada studi biomonitoring ini dilakukan dengan menggunakan instrumen LC-MS/MS. Hasil studi in vitro menunjukkan bahwa paparan BPA, Pb (II), Ni (II), dan hidrogen peroksida terhadap 2-deoksiguanosin dapat memicu pembentukan 8-OHdG, sementara pada studi biomonitoring, konsentrasi senyawa 8-OHdG terdeteksi lebih banyak pada urin balita pengguna botol susu plastik berbahan polikarbonat (PC), mengindikasikan terkandung BPA dalam botol susu plastik tersebut.

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Bisphenol A (4,4'-isopropyldenadiphenol or 2,2-bis(4-hydroxyphenyl)-propane) is a chemical compound used for the production of polycarbonate plastics and epoxy resins. BPA has the potential to cause oxidative DNA damage due to oxidative stress by forming reactive oxygen species. This study was conducted to analyze the formation of 8-OHdG as a biomarker of DNA/gene damage caused by exposure to BPA chemical compounds. In vitro studies were conducted by reacting 2'-deoxyguanosine with BPA, Ni (II), Pb (II), and hydrogen peroxide through Fenton-like reactions with pH variations (7.4 and 8.4), temperature (37°C and 60°C), and incubation time (24 hours and 30 hours). Analysis of 8-OHdG formation in this study was carried out using the reverse phase chromatography HPLC instrument with a UV detector. The biomonitoring study was carried out by taking urine samples of toddlers who use plastic milk bottles. Analysis of 8-OHdG formation in this biomonitoring study was carried out using the LC-MS/MS instrument. Results of in vitro studies showed that exposure to BPA, Pb (II), Ni (II), and hydrogen peroxide to 2-deoxyguanosine could trigger the formation of 8-OHdG. In the biomonitoring study, the concentration of 8-OHdG compounds was detected more in the urine of toddlers who used polycarbonate (PC) plastic milk bottles, indicating that BPA was contained in the plastic milk bottles."

"Penelitian ini dilakukan untuk menganalisis pembentukan DNA Adduct 8-OHdG akibat kerusakan oksidatif DNA yang disebabkan oleh paparan akrilamida (1 mg/kg BB) dan Cu (II) (10 mg/kg BB). Studi in vivo dilakukan dengan menggunakan kelompok tikus (Rattus norvegicus) galur Sprague Dawley yang diberi paparan selama 28 hari dan dilakukan pengambilan sampel urin setiap 7 hari. Studi in vitro dilakukan dengan mereaksikan 2-„deoksiguanosin pH 7,4 dengan akrilamida, Cu (II), H2O2 melalui reaksi Fenton-like pada suhu 37 °C. Analisis 8-OHdG dilakukan dengan instrumentasi LC-MS/MS ionisasi positif, fasa terbalik, dengan gradien elusi campuran ammonium asetat 20mM dan asetonitril. Hasil studi in vivo menunjukkan bahwa paparan akrilamida, Cu, dan gabungan akrilamida + Cu (II) mengakibatkan adanya kerusakan DNA yang dapat menimbulkan risiko kanker. Kelompok paparan gabungan akrilamida + Cu (II) menunjukkan kadar yang paling tinggi, hal ini menunjukkan adanya kesinergisan antara akrilamida dan Cu (II) pada pembentukan kadar 8-OHdG. Pengujian kadar 8-OHdG secara berkala menunjukkan kadar 8-OHdG yang semakin meningkat seiring dengan lamanya waktu paparan. Hasil studi in vitro menunjukkan bahwa akrilamida tidak menginduksi pembentukan 8-OHdG secara langsung, melainkan perlu adanya proses metabolisme terlebih dahulu.

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This study was conducted to analyze the formation of 8-OHdG DNA Adduct due to oxidative DNA damage caused by exposure to acrylamide (1 mg / kg BB) and Cu (II) (10 mg / kg BW). In vivo studies were carried out using a group of Sprague Dawley rats (Rattus norvegicus) that were exposed for 28 days of exposure and urine samples were taken every 7 days. In vitro studies were carried out by reacting 2-oksdeoxiguanosine pH 7.4 with acrylamide, Cu (II), H2O2 through Fenton-like reaction at 37 ° C. The 8-OHdG analysis was performed with positive ionization LC-MS / MS instrumentation, reversed phase system, with a mixture of elution gradient of ammonium acetate 20mM and acetonitrile. The results of in vivo studies showed that acrylamide, Cu, and acrylamide combined Cu (II) exposure caused DNA damage that could cause cancer risk. The exposure group of acrylamide combined Cu (II) combined showed the highest levels, this indicates a synergy between acrylamide and Cu (II) in the formation of 8-OHdG levels. Periodic analysis of 8-OHdG levels shows that 8-OHdG levels are increasing along with the length of time of exposure. In vitro testing shows that acrylamide does not directly induce the formation of 8-OHdG, but rather requires a metabolic process first."