| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated  | 
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| E.1.1.1 | Medical condition in easily understood language  | 
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| E.1.1.2 | Therapeutic area  | Diseases [C] - Immune System Diseases [C20] | 
| MedDRA Classification | 
| E.1.2 Medical condition or disease under investigation | 
| E.1.2 | Version  | 20.0 | 
 
| E.1.2 | Level  | LLT | 
 
| E.1.2 | Classification code  | 10042952 | 
 
| E.1.2 | Term  | Systemic rheumatoid arthritis | 
 
| E.1.2 | System Organ Class  | 100000004859 | 
 
 
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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  | 
| Correlation between PG-MTX concentrations and clinical response to methotrexate in rheumatoid arthritis patients | 
 
| Montrer que les concentrations du PG-MTX sont plus basses chez des patients PR non répondeurs au traitement par MTX par rapport au patients PR répondeurs au traitement par MTX. | 
 
 
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| E.2.2 | Secondary objectives of the trial  | 
Demonstrate that PG-MTX metabolits concentration are  lower in non responder patients than in responder patients. Correlation between PG-MTX and CQR score | 
 
-	Démontrer que les concentrations des différents types PG-MTX sont plus basses chez des patients PR non répondeurs au traitement par MTX par rapport au patients PR répondeurs au traitement par MTX et identifier le plus discriminant -	Rechercher une valeur seuil du MTX-PG -	Confirmer la corrélation entre le MTX-PG et le score CQR  | 
 
 
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| E.2.3 | Trial contains a sub-study  |  No  | 
| E.3 | Principal inclusion criteria  | 
RA patients in remission (DAS 28<2.6) with MTX treatment for at least 6months, and with a stable dose for 3months. And patients with a High Disease Activity Rheumatoid Arthritis activity (DAS 28>3.2) with MTX treatment (≥ 15 mg/semaine), taking MTX treatment for at least 6months with a stable subcutaneous weekly MTX  injection (≥ 15 mg/semaine) treatment during the previous 3 months.  Patients followed in the Rheumatology Department at the CHU de St Etienne. Social security affiliation. Signed informed consent.  Age > 18 years 
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| E.4 | Principal exclusion criteria | 
Patients treated with another csDMARD. Another diagnostic than RA. 
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| E.5 End points | 
| E.5.1 | Primary end point(s) | 
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| E.5.1.1 | Timepoint(s) of evaluation of this end point | 
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| E.5.2 | Secondary end point(s) | 
MTX-PG subtypes : PG-1,2,3,4,5-MTX  CQR score  | 
 
 
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| E.5.2.1 | Timepoint(s) of evaluation of this end point | 
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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 |  No  | 
| E.6.5 | Efficacy |  No  | 
| 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 |  No  | 
| E.6.11 | Pharmacogenomic |  No  | 
| E.6.12 | Pharmacoeconomic |  No  | 
| E.6.13 | Others |  No  | 
| 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) |  No  | 
| E.7.3 | Therapeutic confirmatory (Phase III) |  No  | 
| E.7.4 | Therapeutic use (Phase IV) |  Yes  | 
| E.8 Design of the trial | 
| E.8.1 | Controlled |  No  | 
| E.8.1.1 | Randomised |  No  | 
| E.8.1.2 | Open |  No  | 
| E.8.1.3 | Single blind |  No  | 
| E.8.1.4 | Double blind  |  No  | 
| E.8.1.5 | Parallel group |  No  | 
| 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  |  No  | 
| E.8.2.3 | Other |  No  | 
| E.8.3 | 
                                The trial involves single site in the Member State concerned
                             |  Yes  | 
| E.8.4 |  The trial involves multiple sites in the Member State concerned  |  No  | 
| E.8.5 | The trial involves multiple Member States |  No  | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA |  No  | 
| E.8.6.2 | Trial being conducted completely outside of the EEA |  No  | 
| E.8.7 | Trial has a data monitoring committee |  No  | 
| 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
                     | 
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| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years | 2 | 
| E.8.9.1 | In the Member State concerned months | 0 | 
| E.8.9.1 | In the Member State concerned days | 0 | 
| E.8.9.2 | In all countries concerned by the trial years | 2 | 
| E.8.9.2 | In all countries concerned by the trial months | 0 | 
| E.8.9.2 | In all countries concerned by the trial days | 0 |