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ANDI UTAMA
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Serum Biomarkers For Hepatocellular Carcinoma (Short Review) Bachtiar, Indra; Utama, Andi; Tai, Susan
Indonesian Journal of Cancer Vol 3, No 2 (2009): Apr - Jun 2009
Publisher : "Dharmais" Cancer Center Hospital

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (91.893 KB)

Abstract

Hepatocellular carcinoma (HCC) atau kanker hati adalah salah satu dari kanker yang paling umum dan menjadi penyebab utama kematian di negara-negara Asia. HCC biasanya berkembang pada pasien dengan penyakit hati kronis dan sirosis. Pengamatan HCC pada pasien sirosis biasanya dilakukan menggunakan ?-fetoprotein (AFP) dan ultrasonografi. Akan tetapi, sensitivitas AFP untuk deteksi HCC sangat rendah, sedangkan penggunaan ultrasonografi cukup mahal dan sangat tergantung pada keahlian operator. Hal inilah yang menjadi ide dasar tentang perlunya mencari suatu strategi baru (biomarker baru) dalam mendeteksi HCC secara dini. Biomarker yang ideal harus lebih sensitif, spesifik, noninvasif, murah, dan dapat diterima oleh pasien. Berdasarkan tinjauan literatur yang kami lakukan (2001-2009), dilaporkan beberapa penemuan biomarker baru yang cukup menjanjikan, seperti AFP-L3, des-gamma carboxyprothrombin (DCP), golgi protein 73 (GP73), glypican-3 (GPC3), squamous cell carcinoma antigen (SCCA), transforming growth factor-?1 (TGF?b1), insulin-like growth factor-II (IGF-II), insulin-like growth factor-binding protein-2 (IGFBP-2), human cervical cancer oncogene (HCCR), hepatocyte growth factor (HGF), KL-6 and ?-acid glycoprotein (AAG). Akan tetapi, penggunaannya secara klinis atau uji validasi belum pernah dilaporkan. Beberapa kendala dan keterbatasan yang dilaporkan dalam penemuan biomarker ini antara lain jumlah sampel yang digunakan kurang memadai, metoda analisis yang beragam (heterogenity), terbatas pada wilayah tertentu, predictive analysis biomarker, dan masih sedikitnya studi longitudinal untuk mengevaluasi kemampuan biomarkers dalam mendeteksi penyakit pada taraf preklinik. Uji klinik dan metoda validasi yang tepat saat ini menunggu lahirnya suatu generasi biomarker baru untuk pasien HCC.Kata kunci: Hepatocellular carcinoma (HCC), biomarker, metoda pengujian
RETRANSFORMATION AND EXPRESSION OF RECOMBINANT VIRAL PROTEIN OF JEMBRANA JSU AND JTat (JSU AND JTat) IN pGEX SYSTEM [Retransformasi dan Ekspresi Protein Virus Rekombinan JSU dan JTat Penyakit Jembrana dalam Sistem pGex] Margawati, Endang T; Utama, Andi; Indriawati, Indriawati
BERITA BIOLOGI Vol 9, No 1 (2008)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (707.793 KB) | DOI: 10.14203/beritabiologi.v9i1.802

Abstract

Genom virus penyakit Jembrana setidaknya memiliki 3 gen besar yang menyandi protein dan beberapa di antaranya diperlukan untuk replikasi virus. Protein JSU dan JTat diduga dapat menginduksi kekebalan yang protektif pada sapi Bali terhadap penyakit Jembrana sehingga keduanya sangat berpotensi untuk dipakai sebagai vaksin rekombinan. Penelitian ini dirancang untuk meretransformasi protein rekombinan JSU dan JTat ke dalam Escherichia coli menggunakan sistem pGEX. Konstruk JSU dan JTat dalam pGEX dikoleksi plasmidnya dengan metode miniprep dan kemudian diretranformasikan ke dalam E. coli strain BL21 dan DH5a. JSU dan JTat hasil retransformasi diekspresikan pada medium LB untuk skala produksi kecil dengan sistem pGEX. Hasil penelitian ini meminjukkan bahwa kedua JSU dan JTat hasil retransformasi ke dalam E. coli strain BL21 terlihat tumbuh lebih baik pada medium LB jika dibandingkan retransformasi ke dalam E. coli strain DH5a. Hasil retransformasi JSU dan JTat dikarakterisasi dan diidentifikasi dengan Western blotting dan tampak menunjukkan ukuran protein yang benar, yaitu protein rekombinan JSU berukuran 60kDa dan JTat berukuran 36,7kDa. Protein rekombinan JSU muncul dengan pita tunggal dan lebih jelas jika dibandingkan dengan protein JTat. Konsentrasi protein JSU sedikit lebih rendah (1,883 mg ml ) jika dibandingkan dengan JTat (l,981mg ml).Penelitian ini menunjukkan bahwa JSU pGEX masih tersimpan dan diekspresikan dengan baik, sementara JTat mungkin perlu dilakukan perakitan ulang untuk memantapkan ekspresinya.
Motif Ii of Japanese Encephalitis Vius Ns3 Pro is Not Essential for Rna Binding Activit Utama, Andi; Shimizu, Hiroyuki
ANNALES BOGORIENSES Vol 11, No 1 (2007): Annales Bogorienses
Publisher : Research Center for Biotechnology - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2930.744 KB) | DOI: 10.1234/19

Abstract

The role of motif n  (DEAR AsPw-GlulK,,-Ala.,.7-Hi  1~~  )  of Japanese encephalitis  virus (JEV) NS3 protein on RNA binding activity was studied. A point mutation was introduced to  the motif and  the RNA binding activity of each mutant protein was analyzed. Truncated form of each protein with a His-tag was expressed m Escherichia coli BL2l(DE3) pLysS and purified by metal affinity resin. Asp-285 - and Glu-286 was respectively substituted with Ala, AJa-287 was replaced by Cys.,Gly.  or ser. His-288 was mutated to other 19 amino acids. In total. 24 mutant proteins were produced and analyzed. AL results, all mutants showed quite similar RNA binding activity.  Indicating that motif II of JEY NS3 is not related to RNA binding activity. The same finding was reported for hepatitis C virus c (Hey) NS3 protein, suggesting the similar structure of NS3 protein in flavivirus .Keywords: Japanese encephalitis, R.binding, motif
Construction Of A Recombinant Virus Between Poliovirus And Coxsackie A Virus 11 Utama, Andi; Shimizu, Hiroyuki
ANNALES BOGORIENSES Vol 10, No 1 (2005): Annales Bogorienses
Publisher : Research Center for Biotechnology - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3495.894 KB) | DOI: 10.1234/14

Abstract

Recent outbreaks of circulating vaccine-derived polio virus (cVDPV) revealed the possibility of recombination between vaccine strains poliovirus (PV) and cluster C enterovirus . Based on genetic analysis, it is assumed that coxackie virus 11 (CAV-11 ), one of the cluster enterovirus, may naturally recombine with PV. To elucidate this hypothesis , the chimeric virus between PJ156, a type 1 cVDPV isolate isolated from an acute flaccid paralys is (AFP) case in the Philippines in 2001 , and CAV-11 (PJI56/CAV-11) was constructed by using long-PCR method . As the result , PJl56/CAV-11 was aviable in HEp-2 cell line. The PJl 56/CAV-11 exhibited mostly similar phenotype with parental PJ156 in term of plaque size, viral growth and neurovirulence. These results suggested that recombination between PV and CAV-11 might naturally occur during transmission of vaccine strains in the community. The effect of recombination on the viral phenotype is significantly depending on the counterpart virus  
Purifikasi Inhibitor Atpase/Rna Helikase Virus Japanese Encephalitis Dari Streptomyces chartreusis Elfita, Lina; Ratnakomala, Shanti; Suryadi, Herman; Lisdiyanti, Puspita; Utama, Andi
Majalah Ilmu Kefarmasian Vol. 6, No. 2
Publisher : UI Scholars Hub

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Abstract

Japanese encephalitis virus (JEV) is a neuropathogenic virus commonly caused cen-tral nervous diseases such as meningitis and severe encephalitis. Although vaccine has been developed, no specific and effective drug is available so far. We previously carried out a screening of inhibitor of JEV RNA helicase, an enzyme that essential for virus replication, from Actinomycetes and found that Streptomyces chartreusis produce the inhibitor of JEV RNA helicase. In this study, an extracellular protein which has inhibition activity on ATPase activity of JEV RNA helicase was purified from supernatant of Streptomyces chartreusis culture by ammonium sulfate pre-cipitation and size exclusion chromatography. SDS-PAGE analysis showed a single band with aproximate molecular mass of 11,4 kDa, suggesting that the inhibitor was successfully purified into a single protein.
Co-Authors Andri Sanityoso Sulaiman Griscalia Christine Herman Suryadi HIROYUKI SHIMIZU Indra Bachtiar Indriawati, Indriawati Irsan Hasan Lina Elfita Margawati, Endang T PUSPITA LISDIYANTI Rino Alvani Gani SHANTI RATNAKOMALA Susan Tai