A Study of Subcutaneous (sc) Mircera in Dialysis Patients With Chronic Renal Anemia.

Study Overview
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Brief Summary
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This study will determine the appropriate dose and frequency of administration of sc Mircera maintenance therapy in dialysis patients with chronic renal anemia who were previously receiving sc epoetin alfa or beta. The anticipated time on study treatment is 3-12 months and the target sample size is 100-500 individuals.

Official Title
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An Open-label, Multicenter, Randomized Study to Determine Dose Conversion Factors at Different Frequencies of Administration After Switching From Maintenance Treatment With Subcutaneous Epoetin Alfa or Beta to Maintenance Treatment With Subcutaneous RO0503821 in Dialysis Patients With Chronic Renal Anemia

Conditions
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Anemia

Intervention / Treatment
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* Drug: methoxy polyethylene glycol-epoetin beta [Mircera]


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: adult patients >=18 years of age; chronic renal anemia; on dialysis (hemodialysis or peritoneal dialysis) therapy for at least 3 months; receiving sc epoetin alfa or beta for at least 3 months prior to the run-in period. Exclusion Criteria: women who are pregnant, breastfeeding or using unreliable birth control methods; use of any investigational drug within 30 days preceding the run-in phase, or during the run-in or study treatment period.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Cohort A (0.4/150, 1x/ Week)<br>Eligible participant will be administered RO0503821 (methoxy polyethylene glycol-epoetin beta [Mircera]) SC using a dose conversion factor of 0.4/150 microgram (mcg)/ kilogram (kg) of the previous weekly erythropoiesis stimulating agents (ESA) dose, (equal to 50% assumed equi-effective dose) once weekly up to 19 weeks. After 19 weeks of core treatment period, participants will be followed-up for two optional treatment extension periods (54 weeks each). | Drug: methoxy polyethylene glycol-epoetin beta [Mircera]<br>* Differing doses and frequencies of sc administration<br>|
| Experimental: Cohort B (0.4/150, 1x/ 3 Weeks)<br>Eligible participant will be administered RO0503821 SC using a dose conversion factor of 0.4/150 mcg/kg of the previous weekly ESA dose, (equal to 50% assumed equi-effective dose) once every three weeks up to 19 weeks. After 19 weeks of core treatment period, participants will be followed-up for two optional treatment extension periods (54 weeks each). | Drug: methoxy polyethylene glycol-epoetin beta [Mircera]<br>* Differing doses and frequencies of sc administration<br>|
| Experimental: Cohort C (0.4/150, 1x/ 4 Weeks)<br>Eligible participant will be administered RO0503821 SC using a dose conversion factor of 0.4/150 mcg/kg of the previous weekly ESA dose, (equal to 50% assumed equi-effective dose) once every four weeks up to 21 weeks. After 21 weeks of core treatment period, participants will be followed-up for two optional treatment extension periods (54 weeks each). | Drug: methoxy polyethylene glycol-epoetin beta [Mircera]<br>* Differing doses and frequencies of sc administration<br>|
| Experimental: Cohort D (0.8/150, 1x/ Week)<br>Eligible participant will be administered RO0503821 SC using a dose conversion factor of 0.8/150 mcg/kg of the previous weekly ESA dose, (equal to 100% assumed equi-effective dose) once weekly up to 19 weeks. After 19 weeks of core treatment period, participants will be followed-up for two optional treatment extension periods (54 weeks each). | Drug: methoxy polyethylene glycol-epoetin beta [Mircera]<br>* Differing doses and frequencies of sc administration<br>|
| Experimental: Cohort E (0.8/150, 1x/ 3 Weeks)<br>Eligible participant will be administered RO0503821 SC using a dose conversion factor of 0.8/150 mcg/kg of the previous weekly ESA dose, (equal to 100% assumed equi-effective dose) once every three weeks up to 19 weeks. After 19 weeks of core treatment period, participants will be followed-up for two optional treatment extension periods (54 weeks each). | Drug: methoxy polyethylene glycol-epoetin beta [Mircera]<br>* Differing doses and frequencies of sc administration<br>|
| Experimental: Cohort F (0.8/150, 1x/ 4 Weeks)<br>Eligible participant will be administered RO0503821 SC using a dose conversion factor of 0.8/150 mcg/kg of the previous weekly ESA dose, (equal to 100% assumed equi-effective dose) once every four weeks up to 21 weeks. After 21 weeks of core treatment period, participants will be followed-up for two optional treatment extension periods (54 weeks each). | Drug: methoxy polyethylene glycol-epoetin beta [Mircera]<br>* Differing doses and frequencies of sc administration<br>|
| Experimental: Cohort G (1.2/150, 1x/ Week)<br>Eligible participant will be administered RO0503821 SC using a dose conversion factor of 1.2/150 mcg/kg of the previous weekly ESA dose, (equal to 150% assumed equi-effective dose) once weekly up to 19 weeks. After 19 weeks of core treatment period, participants will be followed-up for two optional treatment extension periods (54 weeks each). | Drug: methoxy polyethylene glycol-epoetin beta [Mircera]<br>* Differing doses and frequencies of sc administration<br>|
| Experimental: Cohort H (1.2/150, 1x/ 3 Weeks)<br>Eligible participant will be administered RO0503821 SC using a dose conversion factor of 1.2/150 mcg/kg of the previous weekly ESA dose, (equal to 150% assumed equi-effective dose) once every three weeks up to 19 weeks. After 19 weeks of core treatment period, participants will be followed-up for two optional treatment extension periods (54 weeks each). | Drug: methoxy polyethylene glycol-epoetin beta [Mircera]<br>* Differing doses and frequencies of sc administration<br>|
| Experimental: Cohort I (1.2/150, 1x/ 4 Weeks)<br>Eligible participant will be administered RO0503821 SC using a dose conversion factor of 1.2/150 mcg/kg of the previous weekly ESA dose, (equal to 150% assumed equi-effective dose) once every four weeks up to 21 weeks. After 21 weeks of core treatment period, participants will be followed-up for two optional treatment extension periods (54 weeks each). | Drug: methoxy polyethylene glycol-epoetin beta [Mircera]<br>* Differing doses and frequencies of sc administration<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Median Change From Baseline in Hemoglobin Levels to End of Initial Treatment Under Constant Dosing Regimen | Median change from Baseline in hemoglobin (Hb) levels to end of initial treatment (EOIT) under constant dosing regimen was reported. For ease of interpretation, all individual slope values were multiplied by 42 to give an estimate of change in Hb values over six weeks. Baseline (Day -28 to Day 1) Hb values was calculated as the mean of the screening assessment (SA) and run-in period (Week -2 and -1). For all participants, an EOIT value was calculated as the last observed Hb value before a dose change or blood transfusion. For participants without any dose adjustments or blood transfusion, the EOIT value was identical to the Week 19 (or Week 21) value. | From Baseline (Day -28 to Day 1) to EOIT (Week 19 or Week 21) | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Median Change From Baseline in Hematocrit Levels to End of Initial Treatment Under Constant Dosing Regimen | Median change from Baseline in hematocrit (Hct) levels to end of initial treatment under constant dosing regimen was reported. Baseline (Day -28 to Day 1) Hct values was calculated as the mean of the SA and run-in period (Weeks -2 and -1). For all participants, an EOIT value was calculated as the last observed Hct value before a dose change or blood transfusion. For participants without any dose adjustments or blood transfusion, the EOIT value was identical to the Week 19 (or Week 21) value. | From Baseline (Day -28 to Day 1) to EOIT (Week 19 or Week 21) | 
| Mean Change From Baseline in Systolic Blood Pressure and Diastolic Blood Pressure Before and After Dialysis | Mean Change from Baseline in systolic blood pressure (SBP) and diastolic blood pressure (DBP) is calculated as the end of treatment values minus the Baseline value. Baseline (Day -28 to Day 1) value is the measurements taken at screening assessment and run-in period (Weeks -2 and -1). | From Baseline (Day -28 to Day 1) to Week 126 | 
| Mean Change in Pulse Rate | Mean change in pulse rate was reported. | Up to Week 126 | 
| Number of Participants With Marked Laboratory Abnormalities | Participants with marked laboratory abnormalities were reported. Marked abnormality criteria: Serum glutamic oxaloacetic transaminase (SGOT); high >25 units per litre (U/L), albumin (low < 31 grams per litre [g/L]), total protein (< 60 g/L), phosphate (high >1.45 millimoles per litre [mmol/L]); Low <0.84 mmol/L), potassium (high >5 mmol/L; Low <3.5 mmol/L), platelets (low:<150×10^9/L), White blood cells ([WBCs]); high: 10.8×10^9/L and Low:4.3×10^9/L), basophils (high:>0.15×10^9/L), eosinophils (high:>0.70×10^9/L), lymphocytes (low:<1.50×10^9/L), and neutrophils (low:<1.83×10^9/L). | Up to Week 126 | 
| Number of Participants With Any Adverse Events, Any Serious Adverse Events, And Deaths | An Adverse Events (AEs) is defined as any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. Serious Adverse Events (SAEs) is defined as any untoward medical occurrence that, at any dose, results in death, is life threatening, requires hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect, or is a significant medical event in the investigator's judgment or requires intervention to prevent one or other of these outcomes. The study design tested 3 different starting dose conversion factors at 3 different dosing schedules during the core study period. As study drug doses can be modified continually over time all results for the two long term safety periods were displayed by dose schedule group only. | Up to Week 126 |