| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated  | 
| Treatment of rheumatoid arthritis (RA). | 
 
 
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| MedDRA Classification | 
| E.1.2 Medical condition or disease under investigation | 
| E.1.2 | Version  | 9.1 | 
 
| E.1.2 | Level  | LLT | 
 
| E.1.2 | Classification code  | 10039073 | 
 
| E.1.2 | Term  | Rheumatoid arthritis | 
 
 
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| E.1.3 | Condition being studied is a rare disease  |  No  | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial  | 
| Proof Of Concept phase of the Protocol: To assess the efficacy of maraviroc (either 150 or 300 mg) versus placebo; both  administered BID for 12 weeks in subjects with RA receiving MTX. | 
 
 
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| E.2.2 | Secondary objectives of the trial  | 
| To evaluate the effect of maraviroc treatment on patient reported outcomes and disease  activity status.  Exploratory  Investigate the changes in peripheral blood gene expression prior to, during, and following  treatment of maraviroc in subjects enrolled in the 12 week Proof-of-Concept (POC) study. | 
 
 
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| E.2.3 | Trial contains a sub-study  |  Information not present in EudraCT  | 
| E.3 | Principal inclusion criteria  | 
| 1. Must be legal age of consent;  2. Must have active RA based upon the American College of Rheumatology (ACR) 1987  (Revised Criteria) and a current level of disease activity defined as:   >/=6 tender/painful joints on motion (28 joint count)  Waived for entry into the  Safety/PK Component   >/=6 swollen joints (28 joint count)  Waived for entry into the Safety/PK Component   CRP>/=0.8 mg/dL (8 mg/L) or an erythrocyte sedimentation rate (ESR) of at least  28 mm/hour  Waived for entry into the Safety/PK Component.  3. Must meet ACR 1991 Revised Criteria for Global Functional Status in RA, Class I, II,  or III;  4. Must be receiving MTX treatment that satisfies all of the following:   >/=10 mg/week and </=25 mg/week (oral or parenteral) unless documented intolerance  requires a lower dose;   >/=12 weeks duration of prior therapy;   MTX dose has been stable >/=4 weeks prior to entry and will remain unchanged  throughout the 12-week Treatment Period.  5. Must provide written informed consent and be willing and able to comply with scheduled  visits, treatment plan, laboratory tests, and other trial procedures. | 
 
 
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| E.4 | Principal exclusion criteria | 
| 1. Subjects with a diagnosis of:   any other inflammatory arthritis (eg, spondyloarthropathies); or   a secondary, non-inflammatory arthritis (eg, osteoarthritis, fibromyalgia) that may  interfere with disease activity assessments. 2. Subjects who have received the following prior treatments:   Within prior 4 weeks: Auranofin (oral gold), injectable gold (aurothioglucose or  aurothiomalate), sulfasalazine, d-penicillamine, antimalarials* (chloroquine and  hydroxychloroquine); azathioprine, cyclosporine, intra-articular, peri-articular,  intramuscular or intravenous corticosteroids, anakrina (Kineret), etanercept  (Enbrel), herbal supplements including fish oil, or leflunomide (see additional  washout information for leflunomide in Section 5.6); (*POC Component only:  subjects on stable doses of antimalarials (chloroquine and hydroxychlorquine) for at  least 60 days may continue these medications).   Within prior 8 weeks: Infliximab (Remicade), adalimumab (Humira).   Within prior 8 weeks: Any experimental therapy for RA (within or outside a clinical  trial); with the exception of experimental NSAID/COX-2 inhibitors for which a  washout interval of not less than 5 half-lives shall apply.   Within prior 3 months: abatacept (Orencia).   Within prior 12 months: rituximab (Rixutan). 3. Subjects with a history of:   chronic or recent serious or life-threatening infection; severe, progressive, and/or  uncontrolled renal, hepatic, hematological, gastrointestinal, endocrine, pulmonary,  cardiac, neurological disease within 12 weeks of first dose;   tuberculosis without treatment and/or positive tuberculin reaction without known  vaccination with the bacilli Calmette-Guerin vaccine (BCG). Refer to Section 7.2.2  for further clarification.   significant trauma or major surgery within 8 weeks of first dose of study medication;   alcohol abuse with less than 24 weeks of sobriety; drug abuse within 3 years of study  start.  4. Subjects who present with:   a positive CCR5∆32 mutation  Waived for entry into the Safety/PK Component;   a history of postural hypotension or a screen finding of postural hypotension (with or  without symptoms) defined as either a systolic BP drop >20 mm Hg, or diastolic BP  drop >10 mm Hg and/or drop in systolic BP to <90 mm Hg as described in  Section 7.2.1;  any condition possibly affecting oral drug absorption (eg, gastrectomy or clinically  significant diabetic gastroenteropathy);   New York Heart Association (NYHA) Class III-IV congestive heart failure requiring  treatment;   Mean QTc interval >450 msec;   infection with HIV or Hepatitis B or C, or evidence of any current active infection;   a history of cancer and in remission for <3 years excluding subjects with adequately  treated or excised non-metastatic basal cell or squamous cell cancer of the skin or  cervical carcinoma in situ.  5. Evidence of organ dysfunction or hematopoietic disorder based on any of the following  assessments:   hemoglobin <10 gm/dL, hematocrit <32%   absolute white blood cell (WBC) count <3.0 × 10(9)/L (<3000/mm3)   platelet count <100 × 10(9)/L (<100,000/mm3)   AST (serum glutamic-oxaloacetic transaminase [SGOT]) or ALT (serum glutamate  pyruvate transaminase [SGPT]) >1.2 × ULN   total bilirubin >1.2 X ULN   albumin <3.5 g/dL or 35 g/L due to known liver disease   estimated glomerular filtration rate (GFR) </=60 mL/min based on Cockcroft-Gault  calculation (Appendix 2)   significantly abnormal electrocardiogram (ECG) findings | 
 
 
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| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| The primary endpoint is the American College of Rheumatology 20% (ACR 20) response  rate at Week 12. | 
 
 
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| E.6 and E.7 Scope of the trial | 
| E.6 | Scope of the trial | 
| E.6.1 | Diagnosis |  No  | 
| E.6.2 | Prophylaxis |  No  | 
| E.6.3 | Therapy |  No  | 
| E.6.4 | Safety |  Yes  | 
| E.6.5 | Efficacy |  Yes  | 
| E.6.6 | Pharmacokinetic |  Yes  | 
| E.6.7 | Pharmacodynamic |  No  | 
| E.6.8 | Bioequivalence |  No  | 
| E.6.9 | Dose response |  No  | 
| E.6.10 | Pharmacogenetic |  Information not present in EudraCT  | 
| E.6.11 | Pharmacogenomic |  No  | 
| E.6.12 | Pharmacoeconomic |  No  | 
| E.6.13 | Others |  Information not present in EudraCT  | 
| E.7 | Trial type and phase | 
| E.7.1 | Human pharmacology (Phase I) |  No  | 
| E.7.1.1 | First administration to humans |  No  | 
| E.7.1.2 | Bioequivalence study |  No  | 
| E.7.1.3 | Other |  No  | 
| E.7.1.3.1 | Other trial type description |  | 
| E.7.2 | Therapeutic exploratory (Phase II) |  Yes  | 
| E.7.3 | Therapeutic confirmatory (Phase III) |  No  | 
| E.7.4 | Therapeutic use (Phase IV) |  No  | 
| E.8 Design of the trial | 
| E.8.1 | Controlled |  Yes  | 
| E.8.1.1 | Randomised |  Yes  | 
| E.8.1.2 | Open |  No  | 
| E.8.1.3 | Single blind |  No  | 
| E.8.1.4 | Double blind  |  Yes  | 
| E.8.1.5 | Parallel group |  Yes  | 
| E.8.1.6 | Cross over  |  No  | 
| E.8.1.7 | Other |  No  | 
| E.8.2 |  Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) |  No  | 
| E.8.2.2 | Placebo  |  Yes  | 
| E.8.2.3 | Other |  No  | 
| E.8.3 | 
                                The trial involves single site in the Member State concerned
                             |  No  | 
| E.8.4 |  The trial involves multiple sites in the Member State concerned  |  Yes  | 
| E.8.5 | The trial involves multiple Member States |  Yes  | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA |  Yes  | 
| E.8.6.2 | Trial being conducted completely outside of the EEA |  Information not present in EudraCT  | 
| E.8.6.3 | If E.8.6.1 or E.8.6.2 are Yes, specify the regions in which trial sites are planned | 
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| E.8.7 | Trial has a data monitoring committee |  Information not present in EudraCT  | 
| E.8.8 | 
                        Definition of the end of the trial and justification where it is not the last
                        visit of the last subject undergoing the trial
                     |  | 
| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years | 1 | 
| E.8.9.1 | In the Member State concerned months | 5 | 
| E.8.9.1 | In the Member State concerned days |  | 
| E.8.9.2 | In all countries concerned by the trial years | 1 | 
| E.8.9.2 | In all countries concerned by the trial months | 5 |