Study to Evaluate Effect of Belatacept on Pharmacokinetics of Inje Cocktail in Healthy Volunteers

Samples for assessment of plasma concentrations of Inje cocktail components (midazolam, losartan, omeprazole, dextromethorphan and caffeine) were collected at time = 0 (predose), 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, and 24 hours relative to the dosing of belatacept on Day 4 and Inje cocktail dosing on Days 1, 4, 7, and 11, respectively. The poor metabolizer of CYP2D6 was excluded from summary of dextromethorphan parameters. Inje cocktail components were each measured using HPLC with MS/MS detection. Tmax was measured in hours (h).

Samples for assessment of plasma concentrations of Inje cocktail components (midazolam, losartan, omeprazole, dextromethorphan and caffeine) were collected at time = 0 (predose), 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, and 24 hours relative to the dosing of belatacept on Day 4 and Inje cocktail dosing on Days 1, 4, 7, and 11, respectively. The poor metabolizer of CYP2D6 was excluded from summary of dextromethorphan parameters. Inje cocktail components were each measured using HPLC with MS/MS detection. T-HALF was measured in hours (h).

Samples for assessment of plasma concentrations of Inje cocktail components (midazolam, losartan, omeprazole, dextromethorphan and caffeine) were collected at time = 0 (predose), 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, and 24 hours relative to the dosing of belatacept on Day 4 and Inje cocktail dosing on Days 1, 4, 7, and 11, respectively. The poor metabolizer of CYP2D6 was excluded from summary of dextromethorphan parameters. Inje cocktail components were each measured using HPLC with MS/MS detection. CLT/F was measured as liters/hour (L/h)

Samples for assessment of plasma concentrations of Inje cocktail component metabolites (1'-hydroxy-midazolam, E-3174, 5-hydroxyomeprazole, dextrorphan, and paraxanthine) were collected at time = 0 (predose), 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, and 24 hours relative to the dosing of belatacept on Day 4 and Inje cocktail dosing on Days 1, 4, 7, and 11, respectively. The poor metabolizer of CYP2D6 was excluded from summary of Dextrorphan parameters. Inje cocktail component metabolites were each measured using HPLC with MS/MS detection. Cmax was measured in ng/mL.

Area under the plasma concentration-time curve from zero to the last time of the last quantifiable concentration [AUC(0-T)] was measured in ng*h/mL. Samples for assessment of plasma concentrations of Inje cocktail components metabolites (1'-hydroxy-midazolam, E-3174, 5-hydroxyomeprazole, dextrorphan, and paraxanthine) were collected at time = 0 (predose), 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, and 24 hours relative to the dosing of belatacept on Day 4 and Inje cocktail dosing on Days 1, 4, 7, and 11, respectively. The poor metabolizer of CYP2D6 was excluded from summary of Dextrorphan parameters. Inje cocktail components were each measured using HPLC with MS/MS detection.

Area under the plasma concentration-time curve from time zero extrapolated to infinite time [AUC(INF)] was measured in ng*h/mL. Samples for assessment of plasma concentrations of Inje cocktail components metabolites (1'-hydroxy-midazolam, E-3174, 5-hydroxyomeprazole, dextrorphan, and paraxanthine) were collected at time = 0 (predose), 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, and 24 hours relative to the dosing of belatacept on Day 4 and Inje cocktail dosing on Days 1, 4, 7, and 11, respectively. The poor metabolizer of CYP2D6 was excluded from summary of Dextrorphan parameters. Inje cocktail components were each measured using HPLC with MS/MS detection.

Samples for assessment of plasma concentrations of Inje cocktail components metabolites (1'-hydroxy-midazolam, E-3174, 5-hydroxyomeprazole, dextrorphan, and paraxanthine) were collected at time = 0 (predose), 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, and 24 hours relative to the dosing of belatacept on Day 4 and Inje cocktail dosing on Days 1, 4, 7, and 11, respectively. The poor metabolizer of CYP2D6 was excluded from summary of Dextrorphan parameters. Inje cocktail components were each measured using HPLC with MS/MS detection. Time of maximum observed plasma concentration (Tmax) was measured in hours (h).

Plasma half-life (T-HALF) was measured in hours (h). Samples for assessment of plasma concentrations of Inje cocktail components metabolites (1'-hydroxy-midazolam, E-3174, 5-hydroxyomeprazole, dextrorphan, and paraxanthine) were collected at time = 0 (predose), 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, and 24 hours relative to the dosing of belatacept on Day 4 and Inje cocktail dosing on Days 1, 4, 7, and 11, respectively. The poor metabolizer of CYP2D6 was excluded from summary of Dextrorphan parameters. Inje cocktail components were each measured using HPLC with MS/MS detection.

Metabolite (paraxanthine) to parent (caffeine) ratio was corrected for molecular weight. AUC (0-T) and AUC (INF) measured in ng*h/mL. Samples for assessment of plasma concentrations of Inje cocktail components and the metabolites of those components were collected at time = 0 (predose), 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, and 24 hours relative to the dosing of belatacept on Day 4 and Inje cocktail dosing on Days 1, 4, 7, and 11, respectively. Inje cocktail components were each measured using HPLC with MS/MS detection.

Metabolite (paraxanthine) to parent (caffeine) ratio was corrected for molecular weight. Cmax measured in ng/mL. Samples for assessment of plasma concentrations of Inje cocktail components and their metabolites were collected at time = 0 (predose), 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, and 24 hours relative to the dosing of belatacept on Day 4 and Inje cocktail dosing on Days 1, 4, 7, and 11, respectively. Inje cocktail components were each measured using HPLC with MS/MS detection.

Metabolite (E-3174) to parent (losartan) ratio was corrected for molecular weight. AUC (0-T) and AUC (INF) measured in ng*h/mL. Samples for assessment of plasma concentrations of Inje cocktail components and the metabolites of those components were collected at time = 0 (predose), 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, and 24 hours relative to the dosing of belatacept on Day 4 and Inje cocktail dosing on Days 1, 4, 7, and 11, respectively. Inje cocktail components were each measured using HPLC with MS/MS detection.

Metabolite (E-3174) to parent (losartan) ratio was corrected for molecular weight. Cmax measured in ng/mL. Samples for assessment of plasma concentrations of Inje cocktail components and the metabolites of those components were collected at time = 0 (predose), 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, and 24 hours relative to the dosing of belatacept on Day 4 and Inje cocktail dosing on Days 1, 4, 7, and 11, respectively. Inje cocktail components were each measured using HPLC with MS/MS detection.

Metabolite (5-Hydroxyomeprazole) to parent (omeprazole) ratio was corrected for molecular weight. AUC (0-T) and AUC (INF) measured in ng*h/mL. Samples for assessment of plasma concentrations of Inje cocktail components and the metabolites of those components were collected at time = 0 (predose), 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, and 24 hours relative to the dosing of belatacept on Day 4 and Inje cocktail dosing on Days 1, 4, 7, and 11, respectively. Inje cocktail components were each measured using HPLC with MS/MS detection.

Metabolite (5-hydroxyomeprazole) to parent (omeprazole) ratio was corrected for molecular weight. Cmax measured in ng/mL. Samples for assessment of plasma concentrations of Inje cocktail components and the metabolites of those components were collected at time = 0 (predose), 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, and 24 hours relative to the dosing of belatacept on Day 4 and Inje cocktail dosing on Days 1, 4, 7, and 11, respectively. Inje cocktail components were each measured using HPLC with MS/MS detection.

Metabolite (5-dextrorphan ) to parent (dextromethorphan) ratio was corrected for molecular weight. AUC (0-T) and AUC (INF) measured in ng*h/mL. Samples for assessment of plasma concentrations of Inje cocktail components and the metabolites of those components were collected at time = 0 (predose), 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, and 24 hours relative to the dosing of belatacept on Day 4 and Inje cocktail dosing on Days 1, 4, 7, and 11, respectively. The poor metabolizer of CYP2D6 was excluded from summary of Dextrorphan parameters. Inje cocktail components were each measured using HPLC with MS/MS detection.

Metabolite (5-dextrorphan) to parent (dextromethorphan) ratio was corrected for molecular weight. Cmax measured in ng/mL. Samples for assessment of plasma concentrations of Inje cocktail components and the metabolites of those components were collected at time = 0 (predose), 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, and 24 hours relative to the dosing of belatacept on Day 4 and Inje cocktail dosing on Days 1, 4, 7, and 11, respectively. The poor metabolizer of CYP2D6 was excluded from summary of Dextrorphan parameters. Inje cocktail components were each measured using HPLC with MS/MS detection.

Metabolite (1'-hydroxy-midazolam) to parent (midazolam) ratio was corrected for molecular weight. AUC (0-T) and AUC (INF) measured in ng*h/mL. Samples for assessment of plasma concentrations of Inje cocktail components and the metabolites of those components were collected at time = 0 (predose), 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, and 24 hours relative to the dosing of belatacept on Day 4 and Inje cocktail dosing on Days 1, 4, 7, and 11, respectively. Inje cocktail components were each measured using HPLC with MS/MS detection.

Metabolite (1'-hydroxy-midazolam) to parent (midazolam) ratio was corrected for molecular weight. Cmax measured in ng/mL. Samples for assessment of plasma concentrations of Inje cocktail components and the metabolites of those components were collected at time = 0 (predose), 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, and 24 hours relative to the dosing of belatacept on Day 4 and Inje cocktail dosing on Days 1, 4, 7, and 11, respectively. Inje cocktail components were each measured using HPLC with MS/MS detection.

Adverse events were coded according to the Medical Dictionary for Regulatory Activities (MedDRA), version 15.1. AE=any new unfavorable symptom, sign, or disease or worsening of a preexisting condition that may not have a causal relationship with treatment. SAE=a medical event that at any dose results in death, persistent or significant disability/incapacity, or drug dependency/abuse; is life-threatening, an important medical event, or a congenital anomaly/birth defect; or requires or prolongs hospitalization. Events captured from Day 1 (pre-dose) to last day prior to discharge (Day 46 ±2). In the total group, a participant with an AE is only counted once (ie, data reflected in Days 1, 4, 7, and 11 below could be the same participant with an AE on multiple days of the study).

Samples for laboratory tests were obtained at Screening visit, Day -1 or prior to dosing on Day 1, Days 3, 6, 10, 46, and at early termination, after 10 hours fasting. Upper limits of normal (ULN); Lower limits of normal (LLN); Pre-therapy (Rx); micromoles per liter (µmol/L); millimoles per liter (mmol/L); grams per liter (g/L); Units per liter (U/L); Aspartate Aminotransferase (AST); Blood Urea Nitrogen (BUN) Total Bilirubin: >1.1*ULN if Pre-Rx<= ULN or Pre-Rx is missing, or >1.2*Pre-Rx if Pre-Rx >ULN. AST: >1.25*Pre-Rx if Pre-Rx >ULN or 1.25*ULN if Pre-Rx <= ULN or Pre-Rx is missing. BUN: >1.1*ULN if Pre-Rx<= ULN or Pre-Rx is missing, or >1.2*Pre-Rx if Pre-Rx >ULN. Phosphorus: <0.85*LLN if Pre-RX >= LLN or is missing or if Pre-Rx < LLN. total Protein: <0.9*LLN if Pre-Rx>= LLN or is missing or Pre-Rx > LLN. Creatine Kinase: >1.5*Pre-Rx if Pre-Rx > ULN or is missing or Pre-Rx is <= ULN. Lactate Dehydrogenase: >1.25*ULN if Pre-Rx <= ULN or missing, >1.5*Pre-Rx if Pre-Rx > ULN.

Samples for laboratory tests were obtained at Screening visit, Day -1 or prior to dosing on Day 1, Days 3, 6, 10, 46 ±2, and at early termination, after 10 hours fasting. Leukocytes: *10^9 cells per liter (c/L) < 0.85*Pre-Rx if Pre-Rx < LLN or <0.9*LLN if LLN <= Pre-Rx or Pre-Rx is missing. Neutrophils (absolute): *10^12 c/L < 0.85* Pre-Rx if Pre-Rx < 1.5, <1.5 if Pre-Rx >= 1.5, < 1.5 if Pre-Rx missing. Urine blood from dipstick: >=2 if Pre-Rx <1 or was missing or if Pre-Rx >=1. Urinary microscopic white blood cells (WBC) and red blood cells (RBC) >= 2 if Pre-Rx <2 or if Pre-Rx was missing or >=4 if Pre-Rx >=2.

Participants had 12-Lead electrocardiograms (ECGs) performed at Screening Visit, Day 1 prior to dosing, Day 46 ±2, and at early termination. Definition of out-of-range: PR Interval >210 milliseconds (msec); QRS > 120 msec, QT > 500 msec or > 30 msec change from baseline (Day 1); QT with Fridericia correction (QTcF) > 450 msec or change from baseline of > 30 msec to <= 60 msec or change from baseline > 60 msec.

Systolic and Diastolic blood pressures were taken after the participant had been sitting quietly for at least 5 minutes and the pressures were measured in millimeters of mercury (mm Hg). Pressures were obtained at screening visit, Day -1, and at 0 hour (pre-dose), 0.5 hour (post dose), and 2 hours (post dose) on Days 1, 4, 7, 11. Baseline was defined as last non-missing result with a collection date-time less than the date-time of the first active dose of study drug.

Heart Rate was taken after the participant had been sitting quietly for at least 5 minutes and the heart rate was measured in beats per minute (bpm). Heart Rates were obtained at screening visit, Day -1, and at 0 hour (pre-dose), 0.5 hour (post dose), and 2 hours (post dose) on Days 1, 4, 7, 11. Baseline was defined as last non-missing result with a collection date-time less than the date-time of the first active dose of study drug.

Systolic and Diastolic blood pressures were taken after the participant had been sitting quietly for at least 5 minutes and the pressures were measured in millimeters of mercury (mm Hg). Systolic and Diastolic blood pressures were taken on Day 46 (day of discharge from the study). Baseline was defined as last non-missing result with a collection date-time less than the date-time of the first active dose of study drug.

Heart Rate was taken after the participant had been sitting quietly for at least 5 minutes and was measured in beats per minute (bpm). Hear rate was taken on Day 46 (day of discharge) during the follow up period. Baseline was defined as last non-missing result with a collection date-time less than the date-time of the first active dose of study drug.