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The investigators aim at describing changes in renal glomerular and tubular function with after the switch from TDF to TAF in HIV/HBV-coinfected patients with mild to moderate renal dysfunction and to assess the virological efficacy of TAF on HBV infection.
The study will include HIV/HBV-coinfected participants of the Swiss HIV Cohort Study (SHCS) who are under active care and have been on a stable, TDF-containing ART regimen for at least 6 months. Only patients with an estimated glomerular filtration rate (GFR) between 30 ml/min and 90 ml/min will be included. All individuals who agree to participate will be switched from a TDF-containing ART regimen to a TAF-containing triple ART regimen at week 0 and will be followed for 48 weeks after the treatment change.
Rationale:
Tenofovir alafenamide (TAF) has been shown to cause less renal complications than tenofovir disoproxil fumarate (TDF) while having the same virological efficacy against HIV and HBV infections. In a recent study from the USA and Japan, over 90% of HIV/HBV-coinfected individuals had a suppressed HBV viral load 48 weeks after TDF was replaced by TAF. Thus, TAF might be a valuable treatment option for HIV/HBV-coinfected individuals with TDF-toxicity, especially in the context of resistance to lamivudine and entecavir. However, the safety and efficacy of TAF has not been evaluated to date in HIV/HBV-coinfected patients with renal dysfunction.
Primary objectives:
Secondary objectives:
Intervention:
In eligible patients willing to participate and who have signed an informed consent TDF will be replaced by TAF on day 1 of the study.
Products:
Study Population: eligible patients from all 7 centers of the Swiss HIV Cohort Study will be considered.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Switch | Experimental | Patients are switched from a TDF-containing antiretroviral therapy regimen to a TAF-containing regimen |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Tenofovir Alafenamide | Drug | Patients are switched to either Genvoya (TAF/FTC/EVG/COB) or another FTC/TAF-containing ART regimen |
|
| Measure | Description | Time Frame |
|---|---|---|
| Change in renal function | Assessment of change in eGFR and tubular markers during the first year of TAF-containing ART | 48 weeks |
| HBV suppression | Evaluation of HBV virological suppression and HBsAg loss after 12 months of TAF | 48 weeks |
| Measure | Description | Time Frame |
|---|---|---|
| Treatment interruptions | Description of the proportion of patients with treatment changes or interruptions | 48 weeks |
| Adverse events | Evaluation of the proportion of patients with adverse events during therapy, including grade 2 or above transaminases elevations |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Gilles Wandeler, MD MSc | Insel Gruppe AG, University Hospital Bern | Study Chair |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Kantonsspital St. Gallen | Sankt Gallen | Canton of St. Gallen | 9007 | Switzerland | ||
| Cabinet médical Chave-Crottaz-Roggerto |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 32925387 | Derived | Surial B, Beguelin C, Chave JP, Stockle M, Boillat-Blanco N, Doco-Lecompte T, Bernasconi E, Fehr J, Gunthard HF, Schmid P, Walti LN, Furrer H, Rauch A, Wandeler G; and the Swiss HIV Cohort Study. Brief Report: Switching From TDF to TAF in HIV/HBV-Coinfected Individuals With Renal Dysfunction-A Prospective Cohort Study. J Acquir Immune Defic Syndr. 2020 Oct 1;85(2):227-232. doi: 10.1097/QAI.0000000000002429. |
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| ID | Term |
|---|---|
| D006509 | Hepatitis B |
| D051437 | Renal Insufficiency |
| ID | Term |
|---|---|
| D000086982 | Blood-Borne Infections |
| D003141 | Communicable Diseases |
| D007239 | Infections |
| D018347 | Hepadnaviridae Infections |
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| ID | Term |
|---|---|
| C442442 | tenofovir alafenamide |
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| 48 weeks |
| Liver fibrosis change | Assessment of the proportion of patients with a change in liver fibrosis stage | 48 weeks |
| Lausanne |
| Canton of Vaud |
| 1004 |
| Switzerland |
| Ospedale Regionale di Lugano | Lugano | Canton Ticino | 6903 | Switzerland |
| Centre hospitalier universitaire vaudois (CHUV) | Lausanne | Vaude | 1011 | Switzerland |
| Klinik für Infektiologie und Spitalhygiene, Universitätspital Basel | Basel | 4031 | Switzerland |
| Inselspital | Bern | 3010 | Switzerland |
| Department of Infectious Diseases, Hôpitaux Universitaires de Genève | Geneva | 1211 | Switzerland |
| Klinik für Infektionskrankheiten & Spitalhygiene, Universitätsspital Zürich | Zurich | 8091 | Switzerland |
| D004266 |
| DNA Virus Infections |
| D014777 | Virus Diseases |
| D006525 | Hepatitis, Viral, Human |
| D006505 | Hepatitis |
| D008107 | Liver Diseases |
| D004066 | Digestive System Diseases |
| D007674 | Kidney Diseases |
| D014570 | Urologic Diseases |
| D052776 | Female Urogenital Diseases |
| D005261 | Female Urogenital Diseases and Pregnancy Complications |
| D000091642 | Urogenital Diseases |
| D052801 | Male Urogenital Diseases |