Study to Evaluate the Efficacy of 2LEBV® and 2LXFS® on Asthenia in Patients With an Epstein-Barr Virus Infection (EBVAST)
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ClinicalTrials.gov Identifier: NCT04308278 |
Recruitment Status :
Recruiting
First Posted : March 16, 2020
Last Update Posted : December 23, 2022
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Worldwide, 95% of adults are infected with Epstein-Barr Virus (EBV). These infections may cause different diseases. In most cases, EBV infection is asymptomatic because of a highly effective host immune response. Some individuals develop infectious mononucleosis (a self-limiting lymphoproliferative disorder in adolescents and young adults that is considered to be the primary infection), while others develop chronic fatigue syndrome, EBV-associated lymphoid, or epithelial malignancies.
Today, there is no available treatment to treat and destroy EBV. The treatment is essentially symptomatic (treatment of the symptoms and not of the virus itself) with analgesics for pain for example.
The studied drugs are 2LEBV® and 2LXFS®, from Labo'Life company, and the treatment schema is the same for the two drugs: it consists in taking the content of one capsule per day, sequentially, according to capsules' numerical order: 1 through 10. When capsule number 10 is taken, capsule 1 of the next blister should be taken on the next day to continue the treatment.
The duration of treatment will be of 6 months of continuous intake of the content of 1 capsule/day.
The aim of this study is to provide additional information on effectiveness on the 2LEBV® and 2LXFS®in the treatment of EBV chronic and acute infections, and in particular to demonstrate their effectiveness versus placebo in the reduction of asthenia and other symptoms in EBV infection.
Condition or disease | Intervention/treatment | Phase |
---|---|---|
EBV Infection | Drug: 2LEBV® / 2LXFS® Drug: Placebo | Phase 4 |
Study Type : | Interventional (Clinical Trial) |
Estimated Enrollment : | 88 participants |
Allocation: | Randomized |
Intervention Model: | Parallel Assignment |
Masking: | Triple (Participant, Investigator, Outcomes Assessor) |
Primary Purpose: | Treatment |
Official Title: | Randomized, Placebo-controlled, Double Blind Study to Evaluate the Efficacy of 2LEBV® and 2LXFS® on Asthenia in Patients With an Epstein-Barr Virus Infection. |
Actual Study Start Date : | January 22, 2021 |
Estimated Primary Completion Date : | August 22, 2023 |
Estimated Study Completion Date : | August 30, 2024 |

Arm | Intervention/treatment |
---|---|
Experimental: 2LEBV® / 2LXFS®
6 months of treatment
|
Drug: 2LEBV® / 2LXFS®
The treatment schema consists in taking the content of one capsule a day, 15-30 minutes before breakfast, on an empty stomach, sequentially, according to capsules' numerical order: 1 through 10. When capsule number 10 is taken, capsule 1 of the next blister should be taken on the next day to continue the treatment. The duration of treatment will be 6 months of continuous intake of the content of 1 capsule/day. |
Placebo Comparator: Placebo
6 months of treatment
|
Drug: Placebo
The treatment schema consists in taking the content of one capsule a day, 15-30 minutes before breakfast, on an empty stomach, sequentially, according to capsules' numerical order: 1 through 10. When capsule number 10 is taken, capsule 1 of the next blister should be taken on the next day to continue the treatment. The duration of treatment will be 6 months of continuous intake of the content of 1 capsule/day. |
- Measure of the general fatigue scale of the Multidiensional Fatigue Inventory-20 (MFI-20) questionnaire at the end of the treatment. [ Time Frame: 6 months ]
Multidiensional Fatigue Inventory-20 (MFI-20) questionnaire. 5 scales. Higher scores means worse outcome.
General Fatigue dimension: Minimum value: 4. Maximum Value: 20. Physical fatigue dimension: Minimum value: 4. Maximum Value: 20. Reduced activity dimension: Minimum value: 4. Maximum Value: 20. Reduced motivation dimension: Minimum value: 4. Maximum Value: 20. Mental fatigue dimension: Minimum value: 4. Maximum Value: 20.
- Comparison of the efficacy of the treatment on physical fatigue, reduced activity, reduced motivation and mental fatigue scales on the MFI-20 questionnaire between the 2LEBV® or the 2LXFS®/2LEBV® group versus the placebo group [ Time Frame: 6 months ]
Multidiensional Fatigue Inventory-20 (MFI-20) questionnaire. 5 scales. Higher scores means worse outcome.
Physical fatigue dimension: Minimum value: 4. Maximum Value: 20. Reduced activity dimension: Minimum value: 4. Maximum Value: 20. Reduced motivation dimension: Minimum value: 4. Maximum Value: 20. Mental fatigue dimension: Minimum value: 4. Maximum Value: 20.
- Comparison of the efficacy of the treatment on general fatigue and other dimensions of the MFI-20 questionnaire between the 2LEBV® and the 2LXFS®/2LEBV® group versus the placebo group. [ Time Frame: 3 months ]
Multidiensional Fatigue Inventory-20 (MFI-20) questionnaire. 5 scales. Higher scores means worse outcome.
General Fatigue dimension: Minimum value: 4. Maximum Value: 20. Physical fatigue dimension: Minimum value: 4. Maximum Value: 20. Reduced activity dimension: Minimum value: 4. Maximum Value: 20. Reduced motivation dimension: Minimum value: 4. Maximum Value: 20. Mental fatigue dimension: Minimum value: 4. Maximum Value: 20.
- Comparison of the efficacy of the treatment on general fatigue and other dimensions of the MFI-20 questionnaire between the 2LEBV® and the 2LXFS®/2LEBV® group versus the placebo group. [ Time Frame: 12 months ]
Multidiensional Fatigue Inventory-20 (MFI-20) questionnaire. 5 scales. Higher scores means worse outcome.
General Fatigue dimension: Minimum value: 4. Maximum Value: 20. Physical fatigue dimension: Minimum value: 4. Maximum Value: 20. Reduced activity dimension: Minimum value: 4. Maximum Value: 20. Reduced motivation dimension: Minimum value: 4. Maximum Value: 20. Mental fatigue dimension: Minimum value: 4. Maximum Value: 20.
- Comparisons of the efficacy of the treatment on others symptoms related to EBV infection and their duration between the 2LEBV® and 2LXFS®/2LEBV® group versus the placebo group. [ Time Frame: 6 months ]
- Comparisons of the efficacy of the treatment on others symptoms related to EBV infection and their duration between the 2LEBV® and 2LXFS®/2LEBV® group versus the placebo group. [ Time Frame: 12 months ]
- Comparison of the evolution of the lymphocytes typing between the 2LEBV® and 2LXFS®/2LEBV® group versus the placebo group. [ Time Frame: 12 months ]
- Safety: occurence of adverse events (AEs) and severe adverse events (SAEs), considered as related or not to the study drug. [ Time Frame: 6 months ]
- Comparisons of the efficacy of the treatment on others symptoms related to EBV infection and their duration between the 2LEBV® and 2LXFS®/2LEBV® group versus the placebo group. [ Time Frame: 3 months ]

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
Ages Eligible for Study: | 12 Years and older (Child, Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Pré-Inclusion Criteria:
- Patients, male or female, aged 12 years and older,
- Patient with fatigue for 1 month or more,
- Patient with at least two other symptoms among the following: Long-lasting exhaustion even after light exertion, subfebrile state, fever, loss of appetite, nausea, angina, conjunctivis, sensitive cervical or axillary lymph nodes, erythematous and swollen tonsil, headaches, sore throat, myalgia, muscular weakness, arthralgia, splenomegaly, visual disorders, memory disorders, attention deficit disorders, sleep disorders, gastrointestinal disorders, breathing disorders, cardiovascular disorders.
- Patient (and/or parents if necessary) agrees to perform serology for the study,
- Patient (and/or parents if necessary) agrees to perform lymphocyte typing for the study during the pre-inclusion visit,
- Patients (and/or parents if necessary) having the faculties to understand and respect the constraints of the study,
- Signature of the Informed Consent Form by the patient (and/or parents if necessary).
Inclusion Criteria:
- Patient who have a positive serology for EBV (IgG and/or IgM positive).
Exclusion Criteria:
- Patient who have received any treatment with the 2LEBV® or 2LXFS®,
- Patients who have received any homeopathic treatment in the previous 2 months prior to the study,
- Patients under immunosuppressive treatment,
- Patient undergoing treatment for psychiatric disorders,
- Patients having received immunotherapy or micro-immunotherapy during the last 3 months,
- Patients with known lactose intolerance,
- Pregnant or breastfeeding women,
- Patients who participated in a clinical study in the previous 2-months period,
- Patients (and/or parents of patients if necessary) who are not sufficiently motivated to engage on the total study follow-up period, or likely to travel or to move before the end of the study,
- Patients with severe immunodeficiency disease requiring long term treatment (*) or patients under chemotherapy or radiotherapy,
- Patients under homeopathic or phytotherapy treatment,
- Patients addicted to or using recreational drugs,
- Patient under guardianship and/or curatorship, (*) important renal or respiratory insufficiency, transplanted or grafted patients, HIV/AIDS, terminal cancer.

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04308278
Contact: Bernadette CRASSET | 491 39 07 38 ext +32 | bernadette.crasset@labolife.com |
Belgium | |
Private Practice | Recruiting |
Aartselaar, Belgium, 2630 | |
Contact: Ilse BUNTINX, Dr | |
Principal Investigator: Ilse BUNTINX, Dr | |
Private Practice | Recruiting |
Boortmeerbeek, Belgium, 3190 | |
Contact: Maria-Magdalena HAEMELS, Dr | |
Principal Investigator: Maria-Magdalena HAEMELS, Dr | |
Private Practice | Recruiting |
Brussels, Belgium, 1040 | |
Contact: Eric BEETH, Dr | |
Principal Investigator: Eric BEETH, Dr | |
Private practice | Recruiting |
Brussels, Belgium, 1040 | |
Contact: Vania SIDEROVA | |
Principal Investigator: Vania SIDEROVA, Dr | |
Private Practice | Recruiting |
Bruxelles, Belgium, 1200 | |
Contact: Jan-Jaap HUYSMAN, Dr | |
Principal Investigator: Jan-Jaap HUYSMAN, Dr | |
Private Practice | Recruiting |
Gent, Belgium, 9000 | |
Contact: Maarteen AVET, Dr | |
Principal Investigator: Maarteen AVET, Dr | |
Private Practice | Recruiting |
Jette, Belgium, 1090 | |
Contact: Quirico BLONDA, Dr | |
Principal Investigator: Quirico BLONDA, Dr | |
Private Practice | Recruiting |
Limal, Belgium, 1300 | |
Contact: Quirico BLONDA, Dr | |
Principal Investigator: Quirico BLONDA, Dr | |
Private practice | Recruiting |
Marche-en-Famenne, Belgium, 6900 | |
Contact: Helene PD Saintmar | |
Principal Investigator: Helene Saintmar, Dr | |
Private Practice | Not yet recruiting |
Nivelles, Belgium, 1400 | |
Contact: Véronique BAUDOUX, Dr | |
Principal Investigator: Véronique BAUDOUX, Dr | |
Cabinet privé | Recruiting |
Schoten, Belgium, 2900 | |
Contact: Anne-Léontine PD Fierlafijn, Principal | |
Principal Investigator: Anne-Léontine FIERLAFIJN, Dr | |
Private practice | Recruiting |
Stavelot, Belgium, 4790 | |
Contact: Eric Menard | |
Principal Investigator: Eric Menard, Dr | |
Private practice | Recruiting |
Waregem, Belgium, 8790 | |
Contact: Thijs LONCKE, Dr | |
Principal Investigator: Thijs LONCKE, Dr |
Responsible Party: | Labo'Life |
ClinicalTrials.gov Identifier: | NCT04308278 |
Other Study ID Numbers: |
LLB-2019-03 |
First Posted: | March 16, 2020 Key Record Dates |
Last Update Posted: | December 23, 2022 |
Last Verified: | December 2022 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Studies a U.S. FDA-regulated Drug Product: | No |
Studies a U.S. FDA-regulated Device Product: | No |
Infections Communicable Diseases Virus Diseases Epstein-Barr Virus Infections Asthenia |
Disease Attributes Pathologic Processes Herpesviridae Infections DNA Virus Infections Tumor Virus Infections |