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Response to peginterferon and ribavirin treatment in hepatitis C (HCV) depends on viral and host factors. Single nucleotide polypmorphisms (SNP) near to IL28B gene (especially at rs12979860 and rs8099917) are strongly associated with the response to treatment in HCV genotype 1 infection, less so in HCV genotype 2/3 infection. CC genotype in rs12979860 and TT genotype at rs8099917 are associated with good treatment outcome. Asian populations have high prevalence of CC genotype in other studies, which can explain relatively good response to peginterferon/ ribavirin in genotype 1 infection in Asians compared with Caucasians.
The prevalence of different genotypes of IL28B polymorphism in the local population will be studied. DNA will be extracted from the whole blood sample of hepatitis C patients with genotype 1, 2 and 3 infection. It will be amplified by real-time PCR and subsequently analysed for the genotypes of IL28B SNPs.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| HCV genotype 1 and genotype 2/3 | DNA extracted from whole blood sample will be used as template for real-time PCR amplification. It will be analyzed for the genotypes of IL28B SNPs (genotype CC/CT/TT for rs12979860 and TT/GT/GG for rs8099917). |
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| Measure | Description | Time Frame |
|---|---|---|
| the prevalence of genetic variants for IL28B SNPs (rs 12979860 and rs 8099917) in HCV patients in Singapore. | Baseline |
| Measure | Description | Time Frame |
|---|---|---|
| The distribution of the different SNP variants in different ethnic groups (Chinese, Malay, Indian and others) | Baseline | |
| The association of the genetic variants and the treatment response in patients receiving peg-interferon/ ribavirin therapy. | To study the correlation between genetic variants and treatment response |
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Inclusion Criteria:
Exclusion Criteria:
-Patients with acute hepatitis C infection.
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Hepatitis C patients with genotype 1, 2/3
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| Name | Affiliation | Role |
|---|---|---|
| Poh Yen Loh | Changi General Hospital | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Changi General Hospital | Singapore | 529889 | Singapore |
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| ID | Term |
|---|---|
| D006526 | Hepatitis C |
| ID | Term |
|---|---|
| D000086982 | Blood-Borne Infections |
| D003141 | Communicable Diseases |
| D007239 | Infections |
| D006525 | Hepatitis, Viral, Human |
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DNA extracted from whole blood sample will be used as template for real-time PCR amplification. It will be analyzed for the genotypes of IL28B SNPs (genotype CC/CT/TT for rs12979860 and TT/GT/GG for rs8099917).
| Baseline |
| D014777 |
| Virus Diseases |
| D018178 | Flaviviridae Infections |
| D012327 | RNA Virus Infections |
| D006505 | Hepatitis |
| D008107 | Liver Diseases |
| D004066 | Digestive System Diseases |