Trial on Efficacy and Safety of Pritelivir Tablets for Treatment of Acyclovir-resistant Mucocutaneous HSV (Herpes Simplex Virus) Infections in Immunocompromised Subjects

• Status: Recruiting
• Trial end date: 2024-03-01
• Target enrollment: 0
• Participant gender: All

Summary

Randomized, open-label, multi-center, comparative trial to assess the efficacy and safety in immunocompromised subjects with acyclovir resistant or acyclovir susceptible mucocutaneous HSV infection, treated with pritelivir 100 mg once daily (following a loading dose of 400 mg as first dose to rapidly reach steady-state plasma concentration) or foscarnet 40 mg/kg every 8 hours or 60 mg/kg every 12 hours.

• Phase: Phase 3
• Accepts Healthy Volunteers?: No

Details

• Lead Sponsor: AiCuris Anti-infective Cures GmbH
• Collaborator: Medpace, Inc.
• Treatments: Acyclovir; Foscarnet; Phosphonoacetic Acid; Pritelivir

Criteria

Part C inclusion criteria

1. Immunocompromised men and women of any ethnic group aged ≥16 years.

2. ACV-R mucocutaneous HSV infection based on clinical failure requiring switch to foscarnet treatment or positive ACV resistance testing for current lesion.

3. Lesions accessible for visual inspection to allow assessment of lesion healing including visualization by endoscopy or pharyngoscopy.

4. Willingness to abstain from the application of lotions and/or creams to the area with HSV lesions. Wet/dry saline dressings or bandages at lesion site are allowed.

5. Willingness to use highly effective birth control.

6. Subject, and/or their legally authorized representative, must be willing and able to understand the Informed Consent Form.

7. Negative serum β-HCG (beta-human chorionic gonadotropin) test for women of child-bearing potential at Screening and a negative urine pregnancy test at Day 1.

8. Written informed consent. For subjects, who are unable to provide informed consent for whatever reason, written consent must be obtained from the legal representative.

Part D inclusion criteria

All inclusion criteria as for Part C, except for inclusion criterion 2, which is replaced by:

2. ACV-R and foscarnet-R mucocutaneous HSV infection based on clinical failure or positive genotypic/phenotypic resistance testing for current lesion or documented intolerance to foscarnet requiring cessation of foscarnet treatment or precluding foscarnet treatment.

Part E inclusion criteria

All inclusion criteria as for Part C, except for inclusion criterion 2, which is replaced by:

2. Recurrent mucocutaneous HSV infection considered ACV-S.

Part C exclusion criteria

1. Known resistance/intolerance to pritelivir and/or foscarnet or any of the excipients.

2. Previous treatment in PRIOH-1.

3. Need to use warfarin, phenytoin, paclitaxel.

4. Baseline safety laboratory abnormalities.

5. History or current evidence of gastrointestinal malabsorption which, in the opinion of the Investigator, may affect the extent of absorption of pritelivir.

6. Severe renal insufficiency (eGFR ≤29).

7. History or current evidence of significant cardiovascular, pulmonary, hepatic, renal, gastrointestinal, hematological, endocrinological, metabolic, neurological, psychiatric, or other relevant diseases.

8. Abnormalities in hematological, clinical chemical or any other laboratory variables.

9. Not able to communicate meaningfully with the Investigator and site staff.

10. Any other condition which in the opinion of the Investigator would interfere with successful completion of this clinical trial.

11. Any other important local condition.

12. Pregnant and/or breastfeeding women.

13. Having received an investigational drug in an investigational drug trial unter certain conditions.

Part D exclusion criteria

All exclusion criteria as for Part C, except for exclusion criterion 1, which is replaced by:

1. Known intolerance to pritelivir or any of the excipients and except criterion 13, which is replaced by: 13. Having received an investigational drug in an investigational drug within 7 half-lives after the last administration of this drug before initiating trial medication, except for subjects entering Part D, who have previously received foscarnet treatment in Part C of this trial.

Participation in a clinical trial without receiving other investigational drugs (eg, follow-up phase of a trial, observational study) is permitted.

Part E exclusion criteria

All exclusion criteria as for Part C, except for exclusion criteria 1, which is replaced by known intolerance to pritelivir or any of the excipients and 14. Having used (val)acyclovir within 3 days prior to starting pritelivir.