| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated  | 
This pilot lab-based study will assess skin biopsies from psoriatic patients treated with infliximab and aim to compare the proteomic profiles of samples obtained under the following conditions: 1- psoriatic non-lesional skin;2- psoriatic lesional skin or previous lesional skin, before and after 12 weeks of therapy with infliximab. The therapeutic changes in protein profile will help to correlate disease-modifying effects at molecular level with clinical outcomes. 
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| MedDRA Classification | 
| E.1.2 Medical condition or disease under investigation | 
| E.1.2 | Version  | 12.0 | 
 
| E.1.2 | Level  | LLT | 
 
| E.1.2 | Classification code  | 10037153 | 
 
| E.1.2 | Term  | Psoriasis | 
 
 
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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  | 
To compare the proteomic profiles of skin samples obtained from psoriatic patients before starting and under infliximab treatment from: 1- Psoriatic non-lesional skin 2- psoriatic lesional skin 
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| E.2.2 | Secondary objectives of the trial  | 
1-Identify disease and therapeutic biomarkers  2- Correlate the disease-modifying effects at molecualr level with clinical outcomes | 
 
 
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| E.2.3 | Trial contains a sub-study  |  No  | 
| E.3 | Principal inclusion criteria  | 
1- Moderate to severe chronic plaque-psoriasis, assessed by PASI score > 10 2- Clinical indicaition to infliximab therapy 3- > 18 years old 4- Written infromed consent prior to any study related procedure 5- 60 days washout of prior systemic therapy 6- No primary vaccinations < 6 weeks before trial inclusion | 
 
 
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| E.4 | Principal exclusion criteria | 
1- Guttate, erythrodermic or pustular psoriasis as sole or predominant form of psoriasis 2- History of severe allergic or anaphylactic reactions to monoclonal antibodies 3- Ongoing uncontrolled bacterial, fungal or atypical mycobacterial infection 4- Opportunistic infection 5- Seropositivity for HIV, HBV or HBC virus 6- Pregnancy or breastfeeding 7- Hematological abnormalities 8- History of active tuberculosis or treatment for TB in the previous year 9- Lupus or elevation of ANA / anti dsDNA titers 10- Any malignancy in the previous 5 years, including lymphoproliferative disorders. Patients with fully resolved basel cell or squamous cell skin cancer may be enrolled. 11- Hospital admission for cardiac disease, stroke, pulmonary disease < 1year. 12- Any medical condition that, in the judgement of the investigator, would jeopardize the patient safety.   | 
 
 
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| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| Patients reaching greater or equal PASI 75 response at week 12 will be eligible for sample collection for this research study that will compare the proteome of non-lesional and lesional skin samples before and under 12 weeks of infliximab treatment. | 
 
 
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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 |  No  | 
| 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 |  Yes  | 
| E.6.13.1 | Other scope of the trial description | 
| Proteomics (laboratory research study) | 
 
 
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| 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 |  Yes  | 
| E.7.1.3.1 | Other trial type description | 
| basic investigational study | 
 
 
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| 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) |  Information not present in EudraCT  | 
| E.8.2.2 | Placebo  |  Information not present in EudraCT  | 
| E.8.2.3 | Other |  Information not present in EudraCT  | 
| 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.8.4.1 | Number of sites anticipated in Member State concerned | 1 | 
| 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 |  Information not present in EudraCT  | 
| 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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| 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 | 6 | 
| 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 | 6 | 
| E.8.9.2 | In all countries concerned by the trial days | 0 |