Agus Sjahrurachman
Department of Microbiology, Faculty of Medicine, Universitas Indonesia, Jakarta

Published : 9 Documents
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Monoclonal antibodies to human IgM Sjahrurachman, Agus; Indrawati, Agustin; Ernawati, Betty; Ibrabim, Fera; Mardiastuti, Mardiastuti
Medical Journal of Indonesia Vol 8, No 4 (1999): October-December
Publisher : Faculty of Medicine Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (512.461 KB) | DOI: 10.13181/mji.v8i4.714

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[no abstract available]
Comparison of two dot immunoassays for diagnosis of dengue infection Sjahrurachman, Agus; Ernawati, Betty; lbrahim, Fera; Mardiastuti, Mardiastuti; Sudiro, Tjahjani Mirawati; Sudarmono, Pratiwi
Medical Journal of Indonesia Vol 9, No 4 (2000): October-December
Publisher : Faculty of Medicine Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (541.53 KB) | DOI: 10.13181/mji.v9i4.619

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[no abstract available]
Semi-quantitative dot immunoassay for detection of IgM anti-dengue antibodies in human sera Sjahrurachman, Agus; Ernawati, Betty; Ibrahim, Fera; Mardiastuti, Mardiastuti; Sudiro, Tjahjani M.; Sudarmono, Pratiwi
Medical Journal of Indonesia Vol 9, No 1 (2000): January-March
Publisher : Faculty of Medicine Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (557.893 KB) | DOI: 10.13181/mji.v9i1.643

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[no abstract available]
Differences of antigenic profiles on immunoblotting of wild type measles virus and vaccine virus in Indonesia Setiawan, Made; Sjahrurachman, Agus; lbrahim, Fera; Suwandono, Agus
Paediatrica Indonesiana Vol 48 No 6 (2008): November 2008
Publisher : Indonesian Pediatric Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (228.564 KB) | DOI: 10.14238/pi48.6.2008.364-73

Abstract

Background Measles virus has a negative, single strand RNAgenome which codes for six important structural proteins. Thegenes of the wild type measles virus have many variances hencethe nucleotide sequences of each wild type virus and vaccine virusare different. This differences lead to the antigenic differencesbetween wild type and vaccine virus.Objective The purpose of this research is to investigate thedifferences in the antigenic profiles on immunoblotting betweenwild type and vaccine virus.Results The analysis results are 1) the antigen ofCAM-70 vaccinevirus was less able in cross reacting with the antibodies from G2,G3, 09, CAM-70 and Schwarz; 2) The antibody aga inst CAM-70 was only able to cross react with antigens of N protein and afew of antigens ofF proteins; 3) The wild type virus were veryimmunogenic, hence the antibody titers were very high; 4) TheCAM-70 and MMR vaccine virus were less immunogenic, hencetheir antibody were very low; 5) The antibody responses thatalways occurred from all immunized mice serum were antibodyfor N and F proteins. However, the antibody against CAM-70vaccine virus was still able to react with wild type virus (G2, G3and 09).Conclusion All antigen-antibody reaction on immunoblottingresulted in different profiles especially between wild type virusand CAM-70 vaccine virus. Although CAM-70 vaccine virusshowed clear differences compared to G2, G3 and 09 genotypes,antibodies against CAM-70 were still able to cross react withantigens from other genotypes (G2, G3 and D9).
Perbedaan Sekuens Asam Amino Epitop Sel B dan Sel T pada Protein Hemaglutinin (H) Antara Virus Campak Liar dan Virus Vaksin di Indonesia Setiawan, Made; Sjahrurachman, Agus; Ibrahim, Fera; Suwandono, Agus
Sari Pediatri Vol 10, No 3 (2008)
Publisher : Badan Penerbit Ikatan Dokter Anak Indonesia (BP-IDAI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14238/sp10.3.2008.190-5

Abstract

Latar belakang. Protein H virus campak sangat penting agar virus dapat menginfeksi sel pejamu. Selain itu, protein H dapat merangsang antibodi spesifik yang dapat menetralisasi virus campak, sehingga virus tidak dapat menginfeksi sel. Bila ada perbedaan sekuens asam amino epitop sel B dan sel T pada protein H antara virus campak liar dan virus vaksin campak, maka vaksin tidak dapat merangsang terbentuknya antibodi protektif.Tujuan. Mengetahui perbedaan sekuens asam amino epitop sel B dan sel T pada protein H antara virus campak liar (G2, G3, dan D9) dan virus vaksin CAM-70, Schwarz dan Edmonston-wt.Metode. Ekstraksi dan amplifikasi gen dilakukan di laboratorium menggunakan teknologi biologi molekuler dan analisis gen dan protein dilakukan menggunakan teknologi bioinformatika.Hasil. Ditemukan perbedaan sekuens asam amino epitop sel T pada protein H antara virus campak liar dan virus Edmonstone-wt, sedangkan antara virus campak liar dan virus vaksin (CAM-70 dan vaksin Schwarz) tidak ditemukan perbedaan. Ditemukan perbedaan sekuens asam amino pada epitop sel B protein H antara virus campak liar dan virus vaksin (CAM-70 dan Schwarz, sedangkan antara CAM-70 dan Schwarz tidak ditemukan perbedaan.Kesimpulan. Tidak ada perbedaan sekuens asam amino epitop sel T antara virus campak liar dan virus vaksin (Schwarz dan CAM-70). Perbedaan ditemukan pada epitop sel B antara virus campak liar dan virus vaksin (CAM-70 dan Schwarz).
Differences of nucleotide and amino acid sequences of nucleoprotein (N) gene between wild-type measles virus and vaccine virus in Indonesia Setiawan, Made; Sjahrurachman, Agus; Ibrahim, Fera; Suwandono, Agus
Paediatrica Indonesiana Vol 48 No 2 (2008): March 2008
Publisher : Indonesian Pediatric Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (447.334 KB) | DOI: 10.14238/pi48.2.2008.81-7

Abstract

Background Measles virus is a member of genus morbiliviruswhich belongs to family paramyxovirus with negative, single-strand RNA genome. RNA is packed by nucleocapsid (N) protein.The N protein is very important for RNA replication andtranslation. Abnormality in N protein will induce abnormality invirus replication.Objective This study aimed to explore the differences ofnucleotide sequence of N gene and amino acid sequences of Nprotein between wild-type measles virus (G2, G3 and D9) andvaccine virus (CAM-70, Schwarz and Edmonston-wt)Methods The exctraction and amplification of the gene wereconducted in the laboratory using biomolecular technology. Thegene and protein analysis were conducted using the bioinformatictechnology.Results The results showed that more differences were foundbetween nucleotide sequences of N gene of wild-type measlesvirus against CAM-70 vaccine virus (77 – 79 nucleotides)compared against Schwarz and Edmonston-wt vaccine virus (71-74 nucleotides). Likewise, more differences were also observedbetween amino acid sequences of N protein of wild-type measlesvirus against CAM-70 vaccine virus (18-24 residues) comparedagainst Schwarz and Edmonston-wt vaccine virus (17-23 residues).
Difference of hemaglutinins between wild-type and vaccine measles virus in Indonesia Setiawan, Made; Sjahrurachman, Agus; Ibrahim, Fera; Suwandono, Agus
Paediatrica Indonesiana Vol 48 No 1 (2008): January 2008
Publisher : Indonesian Pediatric Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (465.242 KB) | DOI: 10.14238/pi48.1.2008.42-8

Abstract

Background Hemaglutinin (H) protein of measles virus is veryimportant in the process of host cell infection. H protein is alsoable to induce specific antibodies which can neutralize measlesvirus and block the cell infection.Objective This study aimed to explore the nucleotide and aminoacid sequence differences between wild-type measles virus (G2,G3 and D9) with CAM-70, Schwarz and Edmonston-wt vaccinevirus.Methods The exctration and amplification of the gene wereconducted in the laboratory using biomolecular technology. Thegene and protein analysis were conducted using the bioinformatictechnology.Results The results showed that the differences in nucleotidesequences were highest between wild-type virus and CAM-70vaccine virus (76-77 nucleotides), followed by Schwarz (61-64nucleotides) and Edmonston (60-63 nucleotides). The differencesin amino acid sequences were highest between wild-type virusand CAM-70 (24-29 residues), followed by Schwarz (13-20residues) and Edmonston (12-19 residues).Conclusion The Indonesian wild-type measles virus was geneticallycloser to Schwarz vaccine virus than CAM-70 vaccine virus,hence the neutralizing antibodies generated by Schwarz vaccinewere more specific against Indonesian wild-type virus comparedto CAM-70 vaccine.
Antigenic differences between wildtype measles viruses and vaccine viruses in Indonesia Setiawan, Made; Sjahrurachman, Agus; Ibrahim, Fera; Suwandono, Agus
Paediatrica Indonesiana Vol 48 No 3 (2008): May 2008
Publisher : Indonesian Pediatric Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (245.696 KB) | DOI: 10.14238/pi48.3.2008.125-35

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Background Measles virus has a single, negative strand RNAgenome which codes 6 structural proteins: N, F, P M, H and L.Currently there are several variances in the nucleotide sequencesof N, F, M and H genes across wild type measles viruses, hencemeasles viruses can be categorized into clades and genotypes. Theantigenicity of the previous genotype of measles is different fromthe current genotype.Objective To determine the antigenic differences between wildtype measles virus and measles vaccine virus.Methods Analysis of the antigenic differences between wild typevirus (G2, G3 and D9) and vaccine virus (CAM-70 and Schwarz)was performed by immunizing mice with the respective viruses.The serum was then tested with micro-cross-neutralizationtechnique using the G2, G3, D9 and CAM-70 virus. Tests withcross ELISA examination technique were also performed usingthe same set of virus.Results Analysis of the cross neutralization test and cross ELISAshowed that the highest antigenicity reaction was found betweenwild type virus with antibody against wild type virus, while thelowest reaction was between wild type virus with antibody againstCAM-70.Conclusions We conclude that the antigenicity of antigenic proteinfrom wild type virus is higher than antigenicity of vaccine virusprotein. In addition, it was found that the antigenicity of proteinsfrom Schwarz vaccine virus was higher than proteins CAM-70vaccine virus.
Critical site differences of fusion protein between wildtype and vaccine measles virus strains in Indonesia Setiawan, Made; Sjahrurachman, Agus; Ibrahim, Fera; Suwandono, Agus
Paediatrica Indonesiana Vol 51 No 3 (2011): May 2011
Publisher : Indonesian Pediatric Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (248.395 KB) | DOI: 10.14238/pi51.3.2011.123-7

Abstract

Background Measles virus can cause high morbidity and mortality in infants and children. Fusion glycoprotein (F protein) found in the viral envelope is important for the host cell infection mechanism. F protein is immunogenic and may cause specific immune responses in the host. High variability is found in the F protein gene of vaccine viral strains compared to 'Wild type strains. This amino add sequence variability may result in a less specific immune response against other strains, possibly rendering thevaccine to be less effective.Objective To detennine the amino add sequence differences in critical sites of F protein in Mld type and vaccine measles virus strains in Indonesia.Methods We compared amino acid sequences of three genotypes of Mld type measles virus (02, 03 and D9) to those of the vaccine strains, CAM???? 70, Schwarz, and Edmonston????wt type measles virus.Resul ts Analysis showed that there were differences at Fl????F2 cleavage site, B cell epitopes, and H protein binding site between the CAM????70 vaccine viral strains and Mld type strains. Schwarz vaccine strain differed from the wild type strains at the H protein binding site. A 03 wild type strain potential glycosylation site was also different from all other strains studied.Conclusion There were differences in the critical sites of F protein between Mld type strains and the CAM????70 and Schwarz vaccine strains.