The purpose of this study is to compare the safety and efficacy of a combination of a QD regimen consisting on ritonavir boosted darunavir (FDC) and lamivudine versus ritonavir boosted darunavir (FDC) plus co-formulated tenofovir and emtricitabine or co-formulated tenofovir/lamivudine in naïve HIV-1 infected patients. Subjects will be ARV-naïve HIV-1-infected patients eligible to start ARV therapy according to current guidelines.Subjects will be adults ≥ 18 years of age who meet all of the inclusion criteria and none of the exclusion criteria.

Key Inclusion Criteria

1. Documented HIV RNA >1000 copies/ml
2. Subject naïve to ARV. .
3. Subject has indication to receive an antiretroviral regimen, based on local guidelines.
4. Able to provide informed consent and agree to use a highly effective non-hormonal method of contraception

Key Exclusion Criteria

1. Evidence of resistance to Darunavir and/or FTC or 3TC or TDF based on the resistance test
2. Patient with chronic hepatitis B
3. Subject has a currently active AIDS defining illness (Category C conditions according to the CDC Classification System
4. Required use of disallowed concomitant therapies
5. Subject with the grade 3 or 4 laboratory abnormalities as defined by DAIDS grading table

Primary Objective

• Proportion of patients with HIV-1 RNA levels of less than 50 copies/mL at week 48 (ITT analysis, Snapshot analysis)

Inclusion criteria :

1. > 18 years of age.

2. Patient with documented HIV-1 infection defined as a positive ELISA plus a confirmatory Western Blot; or alternatively, a plasma HIV-1 RNA ≥1,000 copies/mL ever documented.

3. Subject has voluntarily signed and dated an informed consent form, approved by an Institutional Review Board (IRB) / Independent Ethics Committee (IEC), after the nature of the study has been explained and the subject has had the opportunity to ask questions. The informed consent must be signed before any study-specific procedures are performed.

4. Subject agrees not to take any medication during the study, including over the counter medicines or herbal preparations, without the approval of the trial physician.

5. Documented HIV-1 RNA >1,000 copies/mL

6. Subject naïve to ARV. (Patients who had received ARV ≤ 48 hours are allowed). Subject has indication to receive an antiretroviral regimen.

7. Subjects can comply with protocol requirements.

8. Subject's general medical condition, in the investigator's opinion, does not interfere with assessments and completion of the trial.

9. If patient is a female she must not be breastfeeding or pregnant. She must be either postmenopausal for at least one year, surgically sterile (bilateral tubal ligation, bilateral oophorectomy or hysterectomy), or she must:

   • use 2 different methods of birth control including, at least, one barrier method, and are acceptable to both the subject and investigator, and
   • has a urine pregnancy test performed at the Screening Visit and on Baseline. Results of both tests must be negative.
   • continue using 2 different methods of birth control including, at least, one barrier method for at least 30 days after the end of the treatment period

10. For male patients, must comply with the use of a barrier birth control method during the Study and 60 days beyond the Study completion

Exclusion criteria :

1. Evidence of resistance to or 3TC or DRV/r, TDF, FTC o 3TC based in the results of the resistance testing done in the screening visit, such resistance being considered in accordance with IAS-USA panel, version dated March 2013.

   Any of the following mutations will be considered resistance to DRV/r :

   • I47V, I50V, I54M/L, L76V, I84V or, 3 or more minor mutations : V11I, V32I, L33F, T74P, L89V.
   • Any of the following mutations will be considered resistance to 3TC or FTC : M184V/I and /or K65R and / or Q151M.
   • Any of the following mutations will be considered resistance to TDF: K65R, K70E, double insertion 69 or 3 TAMS including M41L or L210W.

2. Prior HIV-2 documented infection.

3. The use of disallowed concomitant therapy (see Appendix C).

4. Active Hepatitis B infection (at any stage).

5. The patient was diagnosed with acute active hepatitis by any cause, or chronic hepatitis C WITH levels of aspartate aminotransferase (AST) and/or alanine aminotransferase (ALT) > 5 higher than the upper limit of normal (ULN) AND/OR may require one-year treatment.

6. Any clinical significant active disease (for instance, tuberculosis, heart failure, pancreatitis) or any medical history or physical examination findings that, according to the investigator's opinion, may risk the patient's safety, the results of the study or adherence to the rules of the protocol.

7. The patient has an active AIDS-associated opportunistic disease (Category C according to the CDC classification system for HIV infection as of 1993) within 30 days after the screening. Stabilized patients under treatment for AIDS-associated opportunistic disease may be included in the study.

8. Life expectancy < 1 year according to the investigator

9. Laboratory tests performed during the screening visit show any of the following alterations:

   • Hemoglobin <8.0 gm/dL
   • Absolute neutrophil count (ANC) < 750 cells/µL
   • Platelet Count < 50,000 cells/mm3

10. The use of any study agent within 30 days as from the screening.

11. Use of immunosuppressive drugs, cytokines inhibitors or other cytokines over the prior year.

12. Any other condition (including, without limitation, the use of alcohol or drugs) that in the investigator's opinion may compromise the safety of the patient or his/her adherence to the protocol

13. Patients who are pregnant or breastfeeding

To publish week 48 study