Trial Outcomes & Findings for First in Human Study of TLC-ART 101 (ACTU 2001) (NCT NCT05850728)

Approximately 240 healthy volunteers without HIV or hepatitis B or C made contact with the study and/or were pre-screened for this study. 20 persons signed informed consent 8 persons were ineligible to enter the study due to either meeting exclusionary criteria or enrollment of planned cohort size.

Enrollment into the cohorts was sequential in this adaptive dose escalation de-escalation study. Therefore only one cohort was enrolling at any time and the cohort assignment was known prior to an individual enrollment.

First in Human Study of TLC-ART 101 (ACTU 2001)

The maximum drug substance plasma concentrations of lopinavir, ritonavir, and tenofovir obtained following a single administration. Sampling for drug concentrations was performed at 15-, 30-, and 45-minutes post-dosing; at 1, 3, 5, 8, and 24 hours; and after 2, 3, 7, 10, 14, 21, 28, 35, 49, and 57 days in Cohort 1. Cohort 2A/2B members had an additional sample drawn at 64 days.

Time (hours) to reach the maximum concentrations of lopinavir, ritonavir, and tenofovir after a single administration of TLC-ART-101. Sampling for drug concentrations was performed at 15-, 30-, and 45-minutes post-dosing; at 1, 3, 5, 8, and 24 hours; and after 2, 3, 7, 10, 14, 21, 28, 35, 49, and 57 days in Cohort 1. Cohort 2A/2B members had an additional sample drawn at 64 days.

Area under the curve of plasma concentrations of lopinavir, ritonavir, and tenofovir over the study timecourse after a single administration. Sampling for drug concentrations was performed at 15-, 30-, and 45-minutes post-dosing; at 1, 3, 5, 8, and 24 hours; and after 2, 3, 7, 10, 14, 21, 28, 35, 49, and 57 days in Cohort 1. Cohort 2A/2B members had an additional sample drawn at 64 days.

The apparent terminal half-life of drug substance plasma concentrations of lopinavir, ritonavir, and tenofovir after a single administration. Sampling for drug concentrations was performed at 15-, 30-, and 45-minutes post-dosing; at 1, 3, 5, 8, and 24 hours; and after 2, 3, 7, 10, 14, 21, 28, 35, 49, and 57 days in Cohort 1. Cohort 2A/2B members had an additional sample drawn at 64 days. The apparent terminal half-life T1/2,z was computed by regression on at least 3 detectable points if Tlast was at 57 or 64 days (end of study) or 2 detected and the first undetectable if Tlast \< 57 or 64 days; detectable timepoints following undetectable plasma levels were excluded from the T1/2 estimation.

Treatment emergent adverse events related to TLC-ART 101 as graded by the Division of AIDS (DAIDS) Table for Grading the Severity of Adult and Pediatric Adverse Events (Corrected Version 2.1 - July 2017). Only related injection site reactions (ISRs) or other related systemic events are reported here. Comprehensive adverse events, related and unrelated, are reported in the Adverse Event section.

Concentrations of the three drug substances in human peripheral blood mononuclear cells from the same blood samples as plasma analyses Duration of drug detection in PBMCs includes the T(ALLQ), or the time in days for which drug concentrations remained persistently above the lower limit of quantification (LLQ), with detectable levels that occurred following LLQ or undetectable values censored; and Tlast, or the time in days until the last quantifiable (≥LLQ) time point regardless of intermediate undetectable/unquantifiable values. For T(ALLQ), no censoring was applied until 24hrs after administration as the drug was absorbed from the injection site. Concentrations of drugs within PBMCs often showed 2 curves, and sometimes with undetectable values between, hence presentation of TALLQ and Tlast to fully characterize the drug timecourse. TALLQ represents the more traditional clinical PK analysis wherein all values after the first LLQ are censored, and Tlast includes all timepoints.

Total exposure of the three drug substances in human peripheral blood mononuclear cells is measured from the same blood samples as plasma analyses. Total exposure to TLC-ART 101 drug components in PBMCs is represented by the area under the curve (AUC). The AUC is presented from Time 0 through the T(ALLQ), representing total exposure throughout the time point (Endpoint #6) through which the drug has always remained above the lower limit of quantification (LLQ).

Duration of detection of intracellular tenofovir-diphosphate (the active moiety of TFV, or TFV-DP) in peripheral blood mononuclear cells. Duration of TFV-DP in PBMCs includes the T(ALLQ), or the time in days for which drug concentrations remained persistently above the lower limit of quantification (LLQ), with detectable levels that occurred following LLQ or undetectable values censored; and Tlast, or the time in days until the last quantifiable (≥LLQ) time point regardless of intermediate undetectable/unquantifiable values. For T(ALLQ), no censoring was applied until 24hrs after administration as the drug was absorbed from the injection site. Concentrations of drugs within PBMCs often showed 2 curves, and sometimes with undetectable values between, hence presentation of TALLQ and Tlast to fully characterize the drug timecourse. TALLQ represents the more traditional clinical PK analysis wherein all values after the first LLQ are censored, and Tlast includes all timepoints.

Total exposure to tenofovir diphosphate (TFV-DP) in PBMCs is represented by the area under the curve (AUC). The AUC is presented from Time 0 through the T(ALLQ), representing total exposure throughout the time point (Endpoint #8) through which TFV-DP has always remained above the lower limit of quantification (LLQ).

Concentration of lymphoid tissue mononuclear cell (LMNC) drug substances in TLC-ART 101 by measuring concentrations of lopinavir, ritonavir, and tenofovir in lymph node mononuclear cells retrieved from inguinal lymph node excision at 24 hours after receipt of TLC-ART 101.

This is the ratio of the LNMC to PBMC concentration at 24hrs after TLC-ART 101 administration within the same 2 individuals