Stephanus Gunawan
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Detection of Hepatitis B Virus Pre-core Mutant by Allele Specific Polymerase Chain Reaction Soemohardjo, Soewignjo; Widita, Haris; Muttaqin, Zainul; Gunawan, Stephanus; Wijaya, Mahendra; Wiguna, Putu Aditya; Rhamdiani, Shelly Olivia
The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy VOLUME 14, NUMBER 1, April 2013
Publisher : The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.036 KB) | DOI: 10.24871/141201319-23

Abstract

Introduction: Mutation in pre-core region is characterized by negative HBeAg and positive anti-HBe despite active replications of the virus. The mutation has diagnostic and prognostic implications. Therefore, detectionof pre-core mutant is important. Standard diagnosis approach for detecting pre-core mutant is through DNA sequencing of hepatitis B virus (HBV) pre-core region. Unfortunately, DNA sequencing is not available in mostcenters. Hence, a simpler diagnostic approach is necessary.Method: An observational-analytic design study was performed. Detection of pre-core mutant was conducted in individuals with positive HBsAg and HBV DNA that had various patterns of HBeAg and anti HBe. HBsAg, HBeAg and anti-HBe was detected using immunochromatography technique. The HBV DNA was evaluated by using qualitative polymerase chain reaction (PCR) testing. PCR was done by three rounds of amplification with primers derived from wild type pre-core and mutant pre-core. Results: Of 25 sera with HBeAg negative, anti-HBe positive and HBV DNA positive, allele specific (AS) PCR pre-core mutant was detected in 20 (80%) sera. Two sera with HBeAg negative, anti HBe negative and HBV DNA positive were negative for pre-core mutant. Of 8 sera with HBeAg positive, anti HBe negative and HBV DNA positive, pre-core mutant was detected in 2 (25%) sera.Conclusion: Most of individuals with HBV DNA positive, HBeAg negative and anti-HBe positive have harbored pre-core mutant. The finding indicated that all patients with HBsAg positive, HBV DNA positive and HBeAg negative, but anti-HBe positive should be examined for the presence of pre-core mutant. Pre-core mutant is also found in HBeAg positive individual. Keywords: HBV, pre-core mutant, polymerase chain reaction
SEORANG PENDERITA HEPATITIS KRONIK B DAN C DENGAN MUTASI PADA GEN P53 KODON 249 PADA JARINGAN HATI Eka Saputra, I Wayan; Gunawan, Stephanus; Muttaqin, Zainul; Soemoharjo, Soewignjo
journal of internal medicine Vol. 8, No. 2 Mei 2007
Publisher : journal of internal medicine

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Abstract

Role of gene P53 as a tumor suppressor gene in generating primary liver cancer is very important primarily in cellgrowth regulation and apoptosis. By using AS-PCR method, the gene mutation can be recognized. It has been reported a chronichepatitis B and C case with experiencing mutation of gene P53 Codone 249 in liver tissue of a 33 years old male with anti HCVpositive, HBsAg positive, on the liver biopsy indicated of chronic hepatitis without cirrhotic features and malignancy signs. OnAS-PCR examination found mutation on gene P53 codone 249. This finding was expected to be an early warning sign foroccurrence of primary liver cancer, so that, early intervention could be performed.
Detection of HBV-DNA and Its Correlation with the HBeAg/Anti-HBe Serological Status in HBsAg-positive Patients Widita, Haris; Soemohardjo, Soewignjo; Muttaqin, Zainul; Wiguna, Putu Aditya; Rhamdiani, Shelly Olivia; Wijaya, Mahendra; Gunawan, Stephanus
The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy VOLUME 13, NUMBER 2, August 2012
Publisher : The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Background: In the past years, HBeAg and anti-HBe status in individuals with positive HBsAg were often correlated to viral replication. This study was aimed to find correlation between the HBV viremia and HBeAg/anti-HBe serological status in HBsAg-positive individuals. Method: An observational-analytic design was performed in this study. The sera of all positive HBsAg patients at Biomedika Hospital Laboratory were collected and examined for HBeAg and anti-HBe using immunochromatography technique between January and April 2012. The sampling method was purposive sampling. Afterwards, the sera were examined for HBV-DNA by polymerase chain reaction (PCR). Results: Sufficient amount of sera were collected from 44 patients consisting of 33 males and 11 females. The mean age was 15-68 years. Positive HBeAg and negative anti-HBe status was found in 11 (42%) patients. Negative HBeAg and positive anti-HBe was found in 26 (59.1%) patients. Both HBeAg and anti-HBe were negative in 7 (16.3%) patients. HBV-DNA was detected in all 11 (100%) patients with positive HBeAg and negative anti-HBe. HBV-DNA was also detected in 11 (42%) patients with negative HBeAg and positive anti-HBe. However, there was only one patient (14.3%) with both negative HBeAg and anti-HBe status, who had detectable HBV-DNA. Conclusion: Positive HBeAg can be used as an indicator of viremia, but negative HBeAg cannot be used as an indicator of the absence of viremia without further HBV-DNA testing. Patients with negative HBeAg and positive HBV-DNA were suspected for having pre-core mutant. Keywords: HBV-DNA, positive HBsAg, HBeAg, anti-HBe, pre-core mutant
HBeAg and Anti HBe Status in Patients with Chronic Hepatitis B Infection Widita, Haris; Gunawan, Stephanus; Laksono, Baskoro Tri; Achwan, Wenny Astuti; Wilusanta, I Gusti Putu; Mahendra, Ketut; Taufiq, Herman S; Soemohardjo, Soewignjo
The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy VOLUME 11, NUMBER 3, December 2010
Publisher : The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy

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Abstract

Background: Data on HBeAg and anti HBe status in patients with chronic hepatitis B infection are not yet available in Indonesia. This study was done to acquire data on HBeAg and anti HBe status in patients with hepatitis B chronic infection. Method: The material of this study was sera, collected from 105 patients with chronic hepatitis B infection from June to November 2007, divided into four groups of hepatoma, liver cirrhosis, chronic hepatitis B and asymptomatic HBsAg carriers. All sera were examined for HBsAg, HbeAg, anti HBe aside from liver function examinations. The sera consisted of 23 sera of patients with hepatoma, 27 with liver cirrhosis, 12 with chronic hepatitis B, and 43 with HBsAg asymptomatic carriers. Results: From 105 samples, only 18.1% samples were in replicative phase, as shown with the positivity of HBeAg and the negativity of anti-HBe. Sera with negative HbeAg and positive anti-HBe were mainly found in liver cirrhosis (70.73%) and least in chronic hepatitis B (50.00%) Conclusion: The high frequency of HBeAg negative and anti-HBe positive in this study might indicate the possible high frequency of pre core mutation. A study using quantitative HBV DNA should be done to confirm it.   Keywords: HBeAg, anti HBe, chronic hepatitis B
Detection of Hepatitis B Virus Pre-core Mutant by Allele Specific Polymerase Chain Reaction Soemohardjo, Soewignjo; Widita, Haris; Muttaqin, Zainul; Gunawan, Stephanus; Wijaya, Mahendra; Wiguna, Putu Aditya; Rhamdiani, Shelly Olivia
The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy VOLUME 14, NUMBER 1, April 2013
Publisher : The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Introduction: Mutation in pre-core region is characterized by negative HBeAg and positive anti-HBe despite active replications of the virus. The mutation has diagnostic and prognostic implications. Therefore, detectionof pre-core mutant is important. Standard diagnosis approach for detecting pre-core mutant is through DNA sequencing of hepatitis B virus (HBV) pre-core region. Unfortunately, DNA sequencing is not available in mostcenters. Hence, a simpler diagnostic approach is necessary.Method: An observational-analytic design study was performed. Detection of pre-core mutant was conducted in individuals with positive HBsAg and HBV DNA that had various patterns of HBeAg and anti HBe. HBsAg, HBeAg and anti-HBe was detected using immunochromatography technique. The HBV DNA was evaluated by using qualitative polymerase chain reaction (PCR) testing. PCR was done by three rounds of amplification with primers derived from wild type pre-core and mutant pre-core. Results: Of 25 sera with HBeAg negative, anti-HBe positive and HBV DNA positive, allele specific (AS) PCR pre-core mutant was detected in 20 (80%) sera. Two sera with HBeAg negative, anti HBe negative and HBV DNA positive were negative for pre-core mutant. Of 8 sera with HBeAg positive, anti HBe negative and HBV DNA positive, pre-core mutant was detected in 2 (25%) sera.Conclusion: Most of individuals with HBV DNA positive, HBeAg negative and anti-HBe positive have harbored pre-core mutant. The finding indicated that all patients with HBsAg positive, HBV DNA positive and HBeAg negative, but anti-HBe positive should be examined for the presence of pre-core mutant. Pre-core mutant is also found in HBeAg positive individual. Keywords: HBV, pre-core mutant, polymerase chain reaction
HBeAg and Anti HBe Status in Patients with Chronic Hepatitis B Infection Widita, Haris; Gunawan, Stephanus; Laksono, Baskoro Tri; Achwan, Wenny Astuti; Wilusanta, I Gusti Putu; Mahendra, Ketut; Taufiq, Herman S; Soemohardjo, Soewignjo
The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy VOLUME 11, NUMBER 3, December 2010
Publisher : The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.036 KB) | DOI: 10.24871/1132010125-127

Abstract

Background: Data on HBeAg and anti HBe status in patients with chronic hepatitis B infection are not yet available in Indonesia. This study was done to acquire data on HBeAg and anti HBe status in patients with hepatitis B chronic infection. Method: The material of this study was sera, collected from 105 patients with chronic hepatitis B infection from June to November 2007, divided into four groups of hepatoma, liver cirrhosis, chronic hepatitis B and asymptomatic HBsAg carriers. All sera were examined for HBsAg, HbeAg, anti HBe aside from liver function examinations. The sera consisted of 23 sera of patients with hepatoma, 27 with liver cirrhosis, 12 with chronic hepatitis B, and 43 with HBsAg asymptomatic carriers. Results: From 105 samples, only 18.1% samples were in replicative phase, as shown with the positivity of HBeAg and the negativity of anti-HBe. Sera with negative HbeAg and positive anti-HBe were mainly found in liver cirrhosis (70.73%) and least in chronic hepatitis B (50.00%) Conclusion: The high frequency of HBeAg negative and anti-HBe positive in this study might indicate the possible high frequency of pre core mutation. A study using quantitative HBV DNA should be done to confirm it.   Keywords: HBeAg, anti HBe, chronic hepatitis B
Detection of HBV-DNA and Its Correlation with the HBeAg/Anti-HBe Serological Status in HBsAg-positive Patients Widita, Haris; Soemohardjo, Soewignjo; Muttaqin, Zainul; Wiguna, Putu Aditya; Rhamdiani, Shelly Olivia; Wijaya, Mahendra; Gunawan, Stephanus
The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy VOLUME 13, NUMBER 2, August 2012
Publisher : The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.036 KB) | DOI: 10.24871/132201286-89

Abstract

Background: In the past years, HBeAg and anti-HBe status in individuals with positive HBsAg were often correlated to viral replication. This study was aimed to find correlation between the HBV viremia and HBeAg/anti-HBe serological status in HBsAg-positive individuals. Method: An observational-analytic design was performed in this study. The sera of all positive HBsAg patients at Biomedika Hospital Laboratory were collected and examined for HBeAg and anti-HBe using immunochromatography technique between January and April 2012. The sampling method was purposive sampling. Afterwards, the sera were examined for HBV-DNA by polymerase chain reaction (PCR). Results: Sufficient amount of sera were collected from 44 patients consisting of 33 males and 11 females. The mean age was 15-68 years. Positive HBeAg and negative anti-HBe status was found in 11 (42%) patients. Negative HBeAg and positive anti-HBe was found in 26 (59.1%) patients. Both HBeAg and anti-HBe were negative in 7 (16.3%) patients. HBV-DNA was detected in all 11 (100%) patients with positive HBeAg and negative anti-HBe. HBV-DNA was also detected in 11 (42%) patients with negative HBeAg and positive anti-HBe. However, there was only one patient (14.3%) with both negative HBeAg and anti-HBe status, who had detectable HBV-DNA. Conclusion: Positive HBeAg can be used as an indicator of viremia, but negative HBeAg cannot be used as an indicator of the absence of viremia without further HBV-DNA testing. Patients with negative HBeAg and positive HBV-DNA were suspected for having pre-core mutant. Keywords: HBV-DNA, positive HBsAg, HBeAg, anti-HBe, pre-core mutant