Belatacept in Liver Transplant Recipients

For 95% CI within each group, normal approximation was used if N>=5. Otherwise exact method was used.

For 95% CI within each group, normal approximation was used if N>=5, otherwise exact method was used.

Any AR that was clinically suspected and biopsy proven (by central pathologist) was included in this triple composite end point. All biopsies for suspected AR were assessed by a blinded central histopathologist using Banff grading. Graft loss was defined as impairment of liver function to such a degree that the participant died or underwent re-transplantation. For 95% CI within each group, normal approximation is used if N>=5. Otherwise exact method is used. For 95% CI of difference, adjustment is made for randomization strata if N >= 5 in each treatment arm.

Any AR that was clinically suspected and biopsy proven (by central pathologist) was included in this triple composite end point. All biopsies for suspected AR were assessed by a central histopathologist using Banff criteria. For 95% CI within each group, normal approximation was used if N>=5, otherwise exact method was used.

Acute rejections were clinically suspected and biopsy proven by central pathologist. The number of episodes of AR was counted.

Acute rejections were clinically suspected and biopsy proven by central pathologist. The number of episodes of AR was counted.

Acute rejections were clinically suspected and biopsy proven by central pathologist. Corticosteroid-resistant rejection = Continued rejection, as documented by liver biopsy, after the completion of 2 days of corticosteroids and requiring use of T-cell depleting agent. Refractory rejection=Continued rejection, as documented by liver biopsy, after use of corticosteroids and T cell depletion therapy. Increase in the dose of TAC was monitored in participants who were assigned to one of the TAC-based regimens. TRT= treatment

Acute rejections were clinically suspected and biopsy proven by central pathologist. Corticosteroid-resistant rejection = Continued rejection, as documented by liver biopsy, after the completion of 2 days of corticosteroids and requiring use of T-cell depleting agent. Refractory rejection=Continued rejection, as documented by liver biopsy, after use of corticosteroids and T cell depletion therapy. Increase in the dose of TAC was monitored in participants who were assigned to one of the TAC-based regimens. DBL=database lock, TRT=treatment

Acute Rejections (AR) were clinically suspected and biopsy proven by central pathologist. The Banff grading is a classification of renal allograft pathology and AR. Grade I: AR requiring moderate (>25%) to severe mononuclear cell interstitial infiltrate and moderate tubulitis; Grade II: AR requiring severe tubulitis and/or intimal arteritis; Grade III: AR requiring transmural arteritis. Only the episode with highest Banff grade for each participant was counted.

Acute Rejections were clinically suspected and biopsy proven by central pathologist. The Banff Rejection Activity Index (RAI) comprises 3 components scored from 0 to 3: venous endothelial inflammation; bile duct inflammation damage; and portal inflammation; the scores are combined to an overall score (the RAI). An overall score of 0-2 is considered indeterminate, score of 3-4 is mild, score of 5-6 is moderate, and score of 7-9 is severe. Only the episode with the highest total RAI score for each participant was counted.

Acute Rejections were clinically suspected and biopsy proven by central pathologist. The Banff Rejection Activity Index (RAI) comprises 3 components scored from 0 to 3: venous endothelial inflammation; bile duct inflammation damage; and portal inflammation; the scores are combined to an overall score (the RAI). An overall score of 0-2 is considered indeterminate, score of 3-4 is mild, score of 5-6 is moderate, and score of 7-9 is severe. Only the episode with the highest total RAI score for each participant was counted.

The time from transplantation to the first AR episode in each treatment arm was summarized using Kaplan-Meier curves. Acute Rejections were clinically suspected and biopsy proven by central pathologist.

GFR was assessed using a true measure of glomerular filtration via iothalamate clearance test. The month 2 time point was selected as the "baseline" time point with respect to measured GFR due to logistical difficulty in obtaining measured GFR at the time of liver transplant and post-transplant renal function largely stabilizing by 2 months. All Measured GFR > 200 were truncated at 200.

GFR is a measure of the rate at which blood is filtered by the kidney. MDRD is an equation (calculation) used to estimate GFR in participants with impaired renal function based on serum creatinine (ScR), age, race, gender, blood urea nitrogen (BUN), and albumin (Alb). GFR (mL/min/1.73 m^2) = 170*(Scr)^-0.999*(Age)^-0.176*(0.762 if female)*(1.180 if African American)*(BUN)^-0.170*(Alb)^+0.318. ). BL= baseline, mL= milliliters; min= minute; m^2= meters squared.

GFR is a measure of the rate at which blood is filtered by the kidney. MDRD is an equation (calculation) used to estimate GFR in participants with impaired renal function based on serum creatinine (ScR), age, race, gender, blood urea nitrogen (BUN), and albumin (Alb). GFR (mL/min/1.73 m^2) = 170*(Scr)^-0.999*(Age)^-0.176*(0.762 if female)*(1.180 if African American)*(BUN)^-0.170*(Alb)^+0.318. ). BL= baseline, mL= milliliters; min= minute; m^2= meters squared.

Measurement of SCr is commonly used as an indicator of renal function. High creatinine blood level is an indicator of deficient filtering by the kidney. SCr was determined at baseline and various post-baseline time points.

Cystatin C is a protein encoded by the CST3 gene, which is mainly used as a biomarker of kidney function. If kidney function and glomerular filtration rate decline, the blood levels of cystatin C rise.

Maximum Plasma Concentration (Cmax) is the maximum observed serum drug concentration.

Maximum Plasma Concentration (Tmax) is the time taken to reach the maximum observed plasma concentration.

Area under the plasma concentration-time curve for each dosing interval is determined using the linear trapezoidal rule. The AUC(TAU) of belatacept from the MI regimens and LI regimens were calculated over 2 and 4 weeks respectively.

Minimum Plasma Concentration (Cmin) is the minimum observed serum drug concentration.

Terminal Half-life (T 1/2) is the time a drug takes for the concentration levels to fall to 50% of their value.

Total body clearance is the rate and extent at which the drug is eliminated from the body. The clearance of a drug is used to understand the processes involved in drug elimination, distribution and metabolism. CLT was estimated from AUC (TAU) between Weeks 12 and 16, assuming steady state.

Volume of distribution (Vss) is the volume in which the total amount of drug would need to be uniformly distributed to produce the desired blood concentration. . Vss was estimated from AUC (TAU) between Weeks 12 and 16, assuming steady state.

Amount Excreted in Ascites (Ae,asc) was estimated from the ascites drug concentrations and volumes within a dosing interval.

Clearance from ascites fluid was determined by amount excreted in ascites fluid (Ae, asc)[0-T] / AUC[0-T], where 0-T is the same duration relative to a belatacept infusion.

Minimum Plasma Concentration (Cmin) is the minimum observed serum drug concentration.

HCV Recurrence is defined as Histological confirmation on liver biopsy by the Ishak (modified Knodell) system and required both a score >= 5 out of 18 on modified Histological Activity Index grading and a fibrosis Score >= 2 out of 6 on modified staging. All biopsies, including Week 52 biopsies, were considered. Only the first HCV recurrence episode for each participant was counted. For 95% CI within each group, normal approximation was used if N>=5, otherwise exact method was used. For 95% CI of difference, normal approximation was used if N>=5 in both arms, otherwise exact method was used.

HCV Recurrence is defined as Histological confirmation on liver biopsy by the Ishak (modified Knodell) system and required both a score >= 5 out of 18 on modified Histological Activity Index grading and a fibrosis Score >= 2 out of 6 on modified staging. All biopsies, including Week 52 biopsies, were considered. Only the first HCV recurrence episode for each participant was counted. For 95% CI within each group, normal approximation was used if N>=5, otherwise exact method was used. For 95% CI of difference, normal approximation was used if N>=5 in both arms, otherwise exact method was used.

Recurrent hepatitis C infection of the allograft following liver transplantation can be detected by monitoring HCV RNA levels. In HCV positive participants, quantitative HCV RNA levels > 2.4 * 10^6 U/mL and > 4.7 * 10^6 U/mL were descriptively summarized by treatment group. BL=baseline

Recurrent hepatitis C infection of the allograft following liver transplantation can be detected by monitoring HCV RNA levels. In HCV positive participants, quantitative HCV RNA levels > 2.4 x 10^6 U/mL and > 4.7 x 10^6 U/mL were descriptively summarized by treatment group. BL = baseline

Percentage of participants who develop dyslipidemia, defined as hypertriglyceridemia (triglycerides [TGs] ≥ 500 mg/dL [5.65 mmol/L]), hypercholesterolemia (Low density lipoprotein [LDL] ≥ 100 mg/dL [2.59 mmol/L]), or elevated non-high density lipoprotein (non- high density lipoprotein [HDL] ≥ 130 mg/dL [3.36 mmol/L]) in the presence of high TGs (TGs ≥ 200 mg/dL [2.26 mmol/L]).

Percentage of participants at any given time (at Month 6 and Month 12) who met the definition of dyslipidemia.Dyslipidemia is defined as hypertriglyceridemia (TGs ≥ 500 mg/dL [5.65 mmol/L]), hypercholesterolemia (LDL ≥ 100 mg/dL [2.59 mmol/L]), or elevated non-HDL (non-HDL ≥ 130 mg/dL [3.36 mmol/L]) in the presence of high TGs (TGs ≥ 200 mg/dL [2.26 mmol/L]).

Participants were considered to have hypertension if they had Diastolic Blood Pressure (SBP) ≥ 80 mmHg.

Percentage of participants who develop hypertension after randomization and transplantation. Transient post-operative increases in BP were not to be counted as new onset hypertension. Hypertension was to be assessed only at or after the Week 4 visit. Participants were considered to have hypertension when either of the following criteria were met: (1) SBP ≥ 130 mm Hg or DBP ≥ 80 mm Hg or (2) participant received an antihypertensive medication(s) for the indication of hypertension or due to medical history of hypertension.

Percentage of participants at any given time who meet the definition of hypertension. Participants were considered to have hypertension when either of the following criteria were met: (1) SBP ≥ 130 mm Hg or DBP ≥ 80 mm Hg or (2) participant received an antihypertensive medication(s) for the indication of hypertension or due to medical history of hypertension.

A participant who did not have diabetes prior to randomization was determined to have NODM if(i) the participant received an antidiabetic medication for a duration of at least 30 days or(ii) at least two fasting plasma glucose (FPG) tests indicate that FPG is>=126 mg/dL (7.0 mmol/L). For 95% CI within each group, normal approximation is used if N>=5. For 95% CI of difference, adjustment is made for randomization strata (HCV-Infection status at baseline) if N >= 5 in each treatment arm.

The HbA1c test is important in diabetes as a long-term measure of control over blood glucose, where the glucose bound to hemoglobin during the past 3-4 months is measured. A baseline diabetes participant was one who had a medical history of diabetes or being under anti-diabetic medication at the time of the transplantation. BL = baseline, DM = Diabetes mellitus.

AE=any new untoward medical occurrence or worsening of a pre-existing medical condition in a participant administered an investigational product and that does not necessarily have a causal relationship with this treatment. SAE=any untoward medical occurrence that results in death, is life-threatening, requires or prolongs inpatient hospitalization (including elective surgery), results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect, or is an important medical event

AE of of special interest included malignancies (including skin carcinomas), infections (viral, cytomegalovirus, herpes, fungal, and bacterial), serious infections

Low hemoglobin: <8 g/dL; Low platelet count: <50*10^9 C/L; Low leukocytes: <2.0 *10^3 c/µL; Low lymphocytes (absolute): <0.5*10^3 c/µL; Low neutrophils (absolute): <1.0*10^3 Cc/µL.

ULN= upper limit of normal; Normal ranges are provided by the central laboratory and may vary according to sex and age. High alkaline phosphatase (ALP): >5.0*ULN U/L; High alanine aminotransferase (ALT): >5.0*ULN U/L; High aspartate aminotransferase (AST): >5.0*ULN U/L; High direct bilirubin: >3.0 * ULN mg/dL; High g-glutamyl transferase (GGT): >5.0*ULN U/L; High total bilirubin: >3.0*ULN mg/dL; High creatinine: > 3.0*ULN mg/dL

Low total calcium: <7 mg/dL; High total calcium: >12.5 mg/dL ; Low bicarbonate: <11 mEq/L; Low serum potassium: <3.0 mEq/L; High serum potassium:>6.0 mEq/L; High serum magnesium: >2.46 mEq/L; Low serum magnesium:<0.8 mEq/L; Low serum sodium: <130 mEq/L; High serum sodium: >155 mEq/L; Low inorganic phosphorus: <2.0 mg/dL; Low albumin: <2 g/dL; High uric acid: >10 mg/dL