ANALISIS KERUSAKAN DNA PADA SEL LIMFOSIT PASIEN PASCA-RADIOTERAPI
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Abstract
Radioterapi yang diberikan dalam dosis tinggi untuk mematikan sel kanker juga dapat menginduksi kerusakan DNA pada sel normal di sekitarnya. Dosis radiasi dibagi menjadi dosis yang lebih kecil yang disebut fraksinasi untuk menurunkan efek radiasi pada jaringan normal. Untuk itu perlu pemantauan pada limfosit darah tepi untuk mengevaluasi kerusakan DNA pasien. Uji komet alkali merupakan teknik yang sederhana dan sensitif untuk mendeteksi ketidakstabilan DNA. Penelitian ini melibatkan 11 pasien yang menjalani radioterapi hingga 20 Gy, dan 11 subyek sehat sebagai kontrol. Penelitian ini bertujuan untuk melihat seberapa besar kerusakan DNA akibat dosis radiasi fraksinasi 20 Gy pada pasien dengan variasi kanker. Hasil penelitian menunjukkan bahwa rerata frekuensi sel yang rusak pada pasien 80,54 ± 12,52% dengan rerata panjang ekor komet 49,98 ± 12,93 µm terdapat perbedaan nyata baik pada frekuensi sel yang rusak maupun nilai rerata panjang ekor komet terhadap kelompok kontrol (p < 0,001). Penelitian ini menyimpulkan bahwa radiasi dosis tinggi dapat menyebabkan kerusakan DNA sel limfosit darah tepi.
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