Renata Fialho1,2, Alison Burridge3, Marco Pereira4, Majella Keller5, Alexandra File5, Jeremy Tibble5, Richard Whale6,7. 1. Sussex Partnership NHS Foundation Trust, Brighton, UK. 2. School of Psychology, University of Sussex, Brighton, UK. 3. Brighton and Sussex Medical School, Falmer, Brighton, Sussex, BN1 9PH, UK. 4. Faculty of Psychology and Educational Sciences, University of Coimbra, Coimbra, Portugal. 5. Digestive Diseases Centre, Brighton and Sussex University Hospitals NHS Trust, Brighton, UK. 6. Sussex Partnership NHS Foundation Trust, Brighton, UK. Richard.whale@brighton.ac.uk. 7. Brighton and Sussex Medical School, Falmer, Brighton, Sussex, BN1 9PH, UK. Richard.whale@brighton.ac.uk.
Abstract
RATIONALE: Major depressive disorder is a common consequence of exposure to the pro-inflammatory cytokine interferon alpha, which is treated effectively with antidepressant medication. Antidepressant mode of action may conflict with interferon alpha's mechanism in treating hepatitis C however. OBJECTIVES: The purpose of this study is to prospectively explore, in a large naturalistic cohort, whether antidepressant exposure influenced end of treatment response of hepatitis C to interferon alpha. METHODS: Two hundred thirty-nine patients infected with chronic hepatitis C and due to receive treatment were recruited. All participants initiated peg-interferon-2-alpha 180 μg weekly sub-cutaneously plus oral ribavirin 800-1200 mg daily. Participants were assessed for DSM-IV major depression at baseline and four weekly during treatment. RESULTS: 32.6 % of the cohort was exposed to an antidepressant (serotonin-reuptake inhibitor: other categorised antidepressants 49:29). At baseline, 3.8 % had major depression and 55.2 % developed major depression during interferon alpha treatment. Exposure to an antidepressant not classified as a serotonin-reuptake inhibitor, of which all were norepinephrine-enhancing (OR 0.15, 95 % CI 0.04-0.60) and having a past history of psychiatric disorder (OR 4.41, 95 % CI 1.39-13.96) independently reduced the likelihood of end of treatment response. Serotonin-reuptake inhibitor exposure did not influence end of treatment response (OR 1.21, 95 % CI 0.35-4.19), neither did major depression at baseline (OR 2.31, 95 % CI 0.55-9.60) or during treatment (OR 0.69, 95 % CI 0.36-1.33). CONCLUSIONS: Our findings support a lack of conflict of therapeutic mechanism of serotonin-reuptake inhibitor antidepressants with interferon alpha in treating hepatitis C, which may include inflammatory influence. This appears not to be true for norepinephrine-enhancing antidepressant types and warrants investigation using more direct methods.
RATIONALE: Major depressive disorder is a common consequence of exposure to the pro-inflammatory cytokine interferon alpha, which is treated effectively with antidepressant medication. Antidepressant mode of action may conflict with interferon alpha's mechanism in treating hepatitis C however. OBJECTIVES: The purpose of this study is to prospectively explore, in a large naturalistic cohort, whether antidepressant exposure influenced end of treatment response of hepatitis C to interferon alpha. METHODS: Two hundred thirty-nine patients infected with chronic hepatitis C and due to receive treatment were recruited. All participants initiated peg-interferon-2-alpha 180 μg weekly sub-cutaneously plus oral ribavirin 800-1200 mg daily. Participants were assessed for DSM-IV major depression at baseline and four weekly during treatment. RESULTS: 32.6 % of the cohort was exposed to an antidepressant (serotonin-reuptake inhibitor: other categorised antidepressants 49:29). At baseline, 3.8 % had major depression and 55.2 % developed major depression during interferon alpha treatment. Exposure to an antidepressant not classified as a serotonin-reuptake inhibitor, of which all were norepinephrine-enhancing (OR 0.15, 95 % CI 0.04-0.60) and having a past history of psychiatric disorder (OR 4.41, 95 % CI 1.39-13.96) independently reduced the likelihood of end of treatment response. Serotonin-reuptake inhibitor exposure did not influence end of treatment response (OR 1.21, 95 % CI 0.35-4.19), neither did major depression at baseline (OR 2.31, 95 % CI 0.55-9.60) or during treatment (OR 0.69, 95 % CI 0.36-1.33). CONCLUSIONS: Our findings support a lack of conflict of therapeutic mechanism of serotonin-reuptake inhibitor antidepressants with interferon alpha in treating hepatitis C, which may include inflammatory influence. This appears not to be true for norepinephrine-enhancing antidepressant types and warrants investigation using more direct methods.
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