Uji Antikanker Isolat Bioaktif L-Asparaginase dari Kunyit Putih (Curcuma mangga Val.) terhadap Sel Kanker Serviks

Citrawati Octavia Suprobo -  Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University Jl. Prof. Soedarto, SH., Tembalang, Semarang, Indonesia
Suprihati Suprihati -  Otolaryngology Department, Faculty of Medicine, Diponegoro University Jalan Prof. Soedarto, Tembalang, Semarang, Indonesia
*Wuryanti Wuryanti -  Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University Jl. Prof. Soedarto, SH., Tembalang, Semarang, Indonesia
Published: 1 Aug 2011.
Open Access Copyright 2011 Jurnal Kimia Sains dan Aplikasi
License URL: http://creativecommons.org/licenses/by-sa/4.0/
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In Vol 14, No 2 (2011): Volume 14 Issue 2 Year 2011
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Abstract
Kunyit putih (Curcuma mangga Val.) merupakan salah satu sumber L-asparaginase yang berpotensi sebagai bioaktif antikanker. Tujuan penelitian ini adalah untuk menentukan nilai LC50 dan potensi antikanker enzim L-asparaginase dari kunyit putih pada kultur sel kanker serviks (Hela). Enzim L-asparaginase diisolasi dengan metode ekstraksi kemudian dimurnikan dengan fraksinasi dan dialisis. Uji aktivitas enzim L-asparaginase dilakukan dengan metode Nessler sedangkan uji kadar protein dengan metode Lowry. Aktivitas spesifik ditentukan melalui perbandingan unit aktivitas terhadap kadar protein. Fraksi enzim L-asparaginase yang memiliki aktivitas spesifik tertinggi diuji sitotoksisitasnya terhadap sel Hela dengan metode MTT (3-(4,5-dimetiltiazol-2-il)-2,5-difeniltetrazoliumbromida) dan potensi antikankernya ditentukan dengan menghitung nilai LC50. Hasil penelitian menunjukkan bahwa enzim L-asparaginase dapat diisolasi dan dimurnikan dari kunyit putih dengan berat enzim fraksi 5 yaitu 0,0097 g dari 1000 g bahan segar. Aktivitas spesifik tertinggi terdapat pada fraksi 5 sebesar 247,925 unit/mg protein. Uji sitotoksisitas pada sel Hela menunjukkan nilai LC50 sebesar 122,462 μg/mL. Dapat disimpulkan bahwa enzim L-asparaginase fraksi 5 dari kunyit putih mampu menghambat pertumbuhan sel Hela, namun kurang potensial sebagai agen antikanker berdasarkan standar NCI (National Cancer Institute).
Keywords
L-asparaginase; Curcuma mangga Val.; antikanker; sel Hela

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