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Analisis Konsentrasi Low Density Lipoprotein Teroksidasi Serum pada Tahapan Aterosklerosis

ismawati ismawati, fadil oenzil, yanwirasti yanwirasti, eti yerizel
  Jurnal Kedokteran Brawijaya, Vol 29, No. 4 (2017),  pp.348-352  

Abstract



Aterosklerosis merupakan proses yang terjadi secara bertahap meliputi tahap inisiasi, progresi dan komplikasi. Beberapa penelitian memperlihatkan kaitan antara stres oksidatif dengan aterosklerosis, tetapi belum ada penelitian yang menganalisis perbedaan stres oksidatif pada berbagai tahap aterosklerosis. Konsentrasi oxidized low density lipoprotein (oxLDL) menggambarkan stres oksidatif yang terjadi sehingga dikenal sebagai marker stres oksidatif. Penelitian ini bertujuan untuk menganalisis konsentrasi oxLDL serum pada berbagai tahap aterosklerosis pada hewan coba. Pada penelitian ini dilakukan pengukuran kadar oxLDL serum pada 24 ekor tikus yang terdiri dari kelompok normal, inisiasi, progresi dan komplikasi. Induksi aterosklerosis dilakukan dengan pemberian vitamin D3 (700.000 IU/kg) dan pakan tinggi lipid (kolesterol 2%, lemak kambing 5%, asam kolat 0,2%) masing-masing selama 2 hari, 4 hari dan 2 minggu. Konsentrasi oxLDL serum diukur dengan teknik Enzyme linked immunosorbent assays (ELISA). Data disajikan sebagai rata-rata±SD. Uji statistik yang digunakan adalah uji Anova. Konsentrasi oxLDL serum lebih tinggi pada inisiasi dibandingkan normal (2,17±0,26ng/mL versus 1,93±0,25ng/mL, p>0,05) dan lebih tinggi lagi pada progresi dan komplikasi (2,75±0,25ng/mL dan 3,3±0,61ng/mL, p<0,05) masing-masing terhadap normal dan inisiasi). Penelitian ini menyimpulkan bahwa terdapat perbedaan konsentrasi oxLDL pada berbagai tahap aterosklerosis dan konsentrasi paling tinggi pada tahap komplikasi. Hal ini membuka kemungkinan untuk mengembangkan oxLDL sebagai marker tahapan aterosklerosis.


Keywords


Aterosklerosis, oxLDL, stres oksidatif

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References


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