ClinicalTrials.gg
CompletedNCT03345992INCLASSUpdated Dec 22, 2020

Benefit of Clarithromycin in Patients With Severe Infections Through Modulation of the Immune System

A Phase 3 interventional study of Clarithromycin and Water for injection in Sepsis, Pneumonia and Gram-Negative Bacteria Infection, sponsored by Hellenic Institute for the Study of Sepsis. Completed at 12 sites in 2 countries. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2020-12-22.

Sponsored by Hellenic Institute for the Study of Sepsis · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
110
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 16 studies in Sepsis by Hellenic Institute for the Study of Sepsis — 4 open to participants now, 6 under way, 4 of them phase 3. Sepsis · Hellenic Institute for the Study of Sepsis.

Enrollment
10th of 13
110 · median 252
Started
2017
with 3 others
Phase 3
6 of 16
3 open now
Registered
4th of 16
by date

Among the 16 studies in Sepsis by Hellenic Institute for the Study of Sepsis, this one is the 10th largest by enrollment of the 13 interventional ones, is one of 4 that started in 2017, is one of 6 in phase 3, and was the 4th registered.

By phase

16 studies; the count open now beside each. This study's row is marked.

Phase 3this study6 · 3 open
Phase 24 · 0 open
Observational3 · 1 open
No phase2 · 0 open
Phase 2/31 · 0 open

By the year they started

First in 2017; this study’s year is marked. 4 started in 2017.

Size and results

Median enrollment 252 across the 13 interventional studies, 200 across the 3 observational. Of the 9 that completed or were terminated, 0 (0%) have results posted.

Watch this landscapeDownload CSVWith an account: a weekly mail of what changed among 16 studies in Sepsis by Hellenic Institute for the Study of Sepsis, or all of them as a file.
02

Study summary

High mortality associated with sepsis and Multiple Organ Dysfunction Syndrome (MODS) calls for alternative, individualized therapies in selected patients that might benefit form specific interventions. Role of macrolides as potential immunomodulatory treatment in sepsis is promising, but unclear. Subgroup analysis of previous large-scale clinical trials on patients with ventilator-associated pneumonia or gram-negative sepsis, showed that addition of clarithromycin to standard antibiotic therapy conferred a significant survival benefit in the subgroup of patients with respiratory dysfunction and MODS. The INCLASS study is aiming to assess the efficacy of intravenous treatment of clarithromycin in the reduction of 28-day mortality among patients suffering from these entities.

Read the detailed description

Sepsis is a condition with actually rising incidence, estimated around 19 cases per 1000 hospitalizations per year in academic hospitals in USA and similar trends in Europe. It is associated with unacceptably high early (in-hospital) mortality of 40- 50%. Current guidelines promote best practice by early recognition and management with timely antibiotic administration, fluids, vasopressors and early identification/ control of infection source. However, in spite of adherence to more intensive and costly protocols of early goal-directed therapy, no further decrease in mortality is achieved. Syndromic approaches on sepsis and therapies targeting immune modulation are under evaluation and failures may partly be due to incomplete understanding of underlying pathophysiological mechanisms and immunological phases (pro and anti-inflammatory) of sepsis.

Macrolides, such as clarithromycin or azithromycin have been shown beneficial in reducing Chronic Obstructive Pulmonary Disease exacerbations (OR 0.55; 95% Confidence Intervals [CI] 0.39-0.77; p\<0.001) partly through anti-inflammatory properties. Besides, when added to a beta-lactam regimen in community-acquired pneumonia, macrolide therapy was associated with reduced mortality risk (OR 0.67; 95% CI 0.61-0.73; p\<0.001) in a recent meta- analysis of observational studies including 42942 patients. An immunomodulatory effect of macrolides, beyond their antimicrobial action may explain these findings.

Clarithromycin as adjunctive treatment to standard antibiotic therapy has been used by our group in two previous large-scale multi-center Randomised Controlled Trials (RCTs) conducted in Greece after approval from the Greek regulatory authorities. The first RCT studied 200 patients with sepsis due to Ventilator Associated Pneumonia (VAP) ( www.clinicaltrials.gov NCT00297674). Identified pathogens mainly included gram- negative bacteria i.e. Acinetobacter baumannii and Pseudomonas aeruginosa that do not belong to the usual antimicrobial spectrum of macrolides. Although 28-day mortality in both arms was similar, patients assigned to the clarithromycin arm experienced earlier weaning from mechanical ventilation and more rapid resolution of VAP, compared to the placebo arm. In the subgroup of patients with septic shock and multiple organ dysfunction syndrome (MODS), probability of sepsis-related death was significantly lower (OR 3.78 vs 19; p = 0.043). Serious adverse events (SAEs) occurred in 3 (3%) clarithromycin-treated patients, with no clear causative link with the study drug in 2 out of 3 cases. Furthermore, hospitalization costs associated clarithromycin use were significantly reduced (by 7000 euros/ patient) compared to the placebo arm.

The second multi-center RCT compared the efficacy of clarithromycin versus placebo added to standard antibiotic therapy in patients with gram-negative sepsis caused by acute pyelonephritis, intra-abdominal infections and primary gram- negative bacteremia; 600 patients were included (www.clinicaltrials.gov NCT01223690). Overall mortality at 28 days in both arms did not differ, but probability of death due to septic shock and MODS was shown once more lower in the clarithromycin-treated group (OR 3.58 vs 6.21; p = 0.036). Interestingly, survival benefit from clarithromycin was even greater in those patients suffering from adult respiratory distress syndrome (ARDS). SAEs were described in 2 (0.7%) patients treated with clarithromycin, while its use was associated with saving of a median of 1000 euros/ hospitalized patient.

Immunomodulatory effects of clarithromycin in sepsis are not yet elucidated. The analysis of circulating monocytes and of circulating cytokines of patients participating in the first RCT showed that treatment with clarithromycin was associated with a decline in Interleukin-10 (IL-10)/ Tumor Necrosis Factor-α (TNF-α) ratio, greater apoptosis of monocytes, enhanced antigen presentation capacity of monocytes, as well as improved capacity of monocytes for cytokine production suggesting an effect consistent with reversal of sepsis-induced immunosuppression. These findings in conjunction with evidence generated from in vitro and animal experiments suggest modulation of the immune response as the mechanism of action of clarithromycin.

In both RCTs, clarithromycin was administered intravenously at a dose of 1g as continuous one-hour intravenous infusion for three or four days. The drug was safe, well tolerated and cost-effective. However, benefit from treatment in both RCTs was shown only after sub-group analysis of the sub-group of patients with respiratory dysfunction and not when analysis comprised the entire study population. As a consequence, in order to consolidate the benefit of clarithromycin among patients with sepsis and respiratory dysfunction, the INCLASS study is a RCT designed to target a patient population with sepsis and respiratory dysfunction. It also targets a population with infections likely to be caused by Gram-negative bacteria that do not belong to the antimicrobial spectrum of clarithromycin. The study's aims are to assess the effect on mortality associated with the use of clarithromycin as adjunctive treatment in the above setting, as well as to provide insight on different biomarkers modification during treatment, to propose a mechanism of action of this treatment and to perform a cost analysis.

03

Conditions studied

  • Sepsis
  • Pneumonia
  • Gram-Negative Bacteria Infection
  • Multiple Organ Failure
  • Respiratory Distress Syndrome
  • Mortality
  • Biomarkers

Keywords

  • Macrolides
04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Adult patients (≥18 years)
  • Patients of both genders
  • form signed by patient or by first-degree relative in case of patient unable to consent
  • Negative (blood or urinary) pregnancy test for female patients of reproductive age
  • Willingness to receive during and seven days after the administration of the study drug.
  • Presence of one or more of the following infections: hospital-acquired pneumonia (HAP), health-care associated pneumonia (HCAP), ventilator-associated pneumonia (VAP), primary Gram-negative bacteremia and intra-abdominal infections.
  • Presence of sepsis as defined by: Sequential Organ Failure Assessment (SOFA) score of 2 or more points for patients who are admitted with infection at the emergency department or increase of admission SOFA score by 2 or more points consequent to infection, for patients already hospitalized
  • Respiratory dysfunction defined as one Partial Arterial Oxygen Pressure to Fraction of Inspired Oxygen (PaO2/FiO2) ratio inferior to 200, independently of the Positive End Expiratory Pressure (PEEP) level.
  • Total SOFA points for organ dysfunctions other than the respiratory function more than 3

Exclusion criteria

Exclusion Criteria:

  • Denial for
  • Age inferior to 18 years
  • Pregnancy (confirmed by blood or urinary pregnancy test) or lactation for female patients of reproductive age.
  • Unwillingness to receive during and seven days after the administration of the study drug.
  • infection (with known Cluster of Differentiation 4-positive [CD4] cell count ≤ 200/mm3)
  • Solid organ, or bone marrow transplantation
  • oral or intravenous intake greater than 0.4 mg/kg of equivalent prednisone daily over the last 15 days
  • Known active neoplasms compromising short-term survival (1 month)
  • Neutropenia \<1000/mm3
  • Known allergy to macrolides
  • Previous participation in the study
  • Administration of a macrolide for the current infection
Terms in these criteria, in plain language(4)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
110 participants (actual)

Study arms

  • Placebo comparator
    Placebo

    After enrollment, the placebo arm will receive water for injection at a volume of 20ml diluted to a final volume of 250 ml dextrose in water 5%, infused once daily through intravenous route, within 1 hour, for a duration of four consecutive days.

    Drug: Water for injection

  • Active comparator
    Clarithromycin

    After enrollment, the active drug arm will receive 1g of clarithromycin (500 mg powder for concentrate for solution for infusion per vial), dissolved into 20 ml water for injection and then diluted to a final volume of 250 ml dextrose in water 5%. This will be infused through intravenous route, once daily within 1 hour, for a duration of four consecutive days.

    Drug: Clarithromycin

Interventions

  • Clarithromycin two vials of lyophilised powder for reconstitution as solution for IV administration per patient, once daily, for four consecutive days.

    Also known as: Klaricid, Biclar

  • DrugWater for injection

    Water for injection 20 ml will be administered, diluted in D/W 5%, IV, once daily for four consecutive days

    Also known as: Sterile Water For Injection

06

What researchers measure

Primary outcomes

  1. Mortality rate at 28 days

    Differences in early (28-day) all-cause mortality rate between clarithromycin and placebo-treated arms

    Time frame: 28 days

Secondary outcomes

  1. Mortality rate at 90 days

    Differences in middle term (90-day) all-cause mortality rate between clarithromycin and placebo-treated arms

    Time frame: 90 days

  2. Mortality rate at 28 days for patients with septic shock

    Differences in early (28-day) all-cause mortality rate between clarithromycin and placebo-treated arms in the subgroup of patients with septic shock

    Time frame: 28 days

  3. Rate of early sepsis response at 3 days

    The number of patients who present at least 25% decrease of day 1 SOFA score on day 3 will be compared between clarithromycin and placebo-treated groups

    Time frame: 3 days

  4. Rate of sepsis resolution at 7 days

    The number of patients who present at least 25% decrease of day 1 SOFA score on day 7 will be compared between clarithromycin and placebo-treated groups

    Time frame: 7 days

  5. New sepsis episode until 28 days

    The number of patients who present a new increase of SOFA score by at least 2 points, consequent to infection, after having previously experienced sepsis resolution, will be compared between clarithromycin and placebo-treated groups

    Time frame: 28 days

  6. Time to new sepsis episode until 28 days

    The time to new sepsis episode, defined as a new increase of SOFA score by at least 2 points, consequent to infection, in patients who have previously experienced sepsis resolution, will be compared between clarithromycin and placebo-treated groups

    Time frame: 28 days

  7. Cell population analysis

    Flow cytometry will be compared between clarithromycin and placebo-treated arms

    Time frame: 10 days

  8. Transcriptome analysis

    Expression of messenger Ribonucleic Acid (mRNA) will be compared between clarithromycin and placebo-treated arms

    Time frame: 10 days

  9. Metabolome analysis

    Metabolites will be compared between clarithromycin and placebo-treated arms

    Time frame: 10 days

  10. Microbiome analysis

    Gut microbiome composition will be compared between clarithromycin and placebo-treated arms

    Time frame: 10 days

  11. Cost of hospitalization

    Real cost of hospitalization, i.e. medication administered and interventions performed, in euros (€), will be compared between clarithromycin and placebo-treated groups

    Time frame: 28 days

07

Study locations

12 sites
  • Intensive Care Unit, Saint-Pierre University Hospital
    Brussels, 1000, Belgium
  • Intensive Care Unit, Brugmann University Hospital
    Brussels, 1020, Belgium
  • Intensive Care Unit, Erasme University Hospital
    Brussels, 1070, Belgium
  • Intensive Care Unit, Korgialeneio-Benakeio General Hospital
    Athens, 11526, Greece
  • Intensive Care Unit, Laikon General Hospital
    Athens, 11527, Greece
  • 2nd Department of Intensive Care Medicine, Attikon University Hospital
    Athens, 12462, Greece
  • 4th Department of Internal Medicine, Attikon University Hospital
    Athens, 12462, Greece
  • 2nd Department of Internal Medicine, Sismanogleio General Hospital
    Athens, 15126, Greece
  • Intensive Care Unit, Agios Dimitrios General Hospital
    Thessaloniki, 54 634, Greece
  • Intensive Care Unit, G. Gennimatas General Hospital
    Thessaloniki, 546 35, Greece
  • Intensive Care Unit, Theageneio Oncological Hospital
    Thessaloniki, 546 39, Greece
  • Intensive Care Unit, Ippokrateion General Hospital
    Thessaloniki, 546 42, Greece
08

References and documents

Publications

  • Giamarellos-Bourboulis EJ, Mylona V, Antonopoulou A, Tsangaris I, Koutelidakis I, Marioli A, Raftogiannis M, Kopterides P, Lymberopoulou K, Mouktaroudi M, Papageorgiou C, Papaziogas B, Georgopoulou AP, Tsaganos T, Papadomichelakis E, Gogos C, Ladas M, Savva A, Pelekanou A, Baziaka F, Koutoukas P, Kanni T, Spyridaki A, Maniatis N, Pelekanos N, Kotsaki A, Vaki I, Douzinas EE, Koratzanis G, Armaganidis A. Effect of clarithromycin in patients with suspected Gram-negative sepsis: results of a randomized controlled trial. J Antimicrob Chemother. 2014 Apr;69(4):1111-8. doi: 10.1093/jac/dkt475. Epub 2013 Nov 28. PubMed 24292991 ↗
  • Spyridaki A, Raftogiannis M, Antonopoulou A, Tsaganos T, Routsi C, Baziaka F, Karagianni V, Mouktaroudi M, Koutoukas P, Pelekanou A, Kotanidou A, Orfanos SE, van der Meer JW, Netea MG, Giamarellos-Bourboulis EJ. Effect of clarithromycin in inflammatory markers of patients with ventilator-associated pneumonia and sepsis caused by Gram-negative bacteria: results from a randomized clinical study. Antimicrob Agents Chemother. 2012 Jul;56(7):3819-25. doi: 10.1128/AAC.05798-11. Epub 2012 May 7. PubMed 22564837 ↗
  • Giamarellos-Bourboulis EJ, Pechere JC, Routsi C, Plachouras D, Kollias S, Raftogiannis M, Zervakis D, Baziaka F, Koronaios A, Antonopoulou A, Markaki V, Koutoukas P, Papadomichelakis E, Tsaganos T, Armaganidis A, Koussoulas V, Kotanidou A, Roussos C, Giamarellou H. Effect of clarithromycin in patients with sepsis and ventilator-associated pneumonia. Clin Infect Dis. 2008 Apr 15;46(8):1157-64. doi: 10.1086/529439. PubMed 18444850 ↗
  • Tsaganos T, Raftogiannis M, Pratikaki M, Christodoulou S, Kotanidou A, Papadomichelakis E, Armaganidis A, Routsi C, Giamarellos-Bourboulis EJ. Clarithromycin Leads to Long-Term Survival and Cost Benefit in Ventilator-Associated Pneumonia and Sepsis. Antimicrob Agents Chemother. 2016 May 23;60(6):3640-6. doi: 10.1128/AAC.02974-15. Print 2016 Jun. PubMed 27044546 ↗
  • Schultz MJ, Speelman P, Hack CE, Buurman WA, van Deventer SJ, van Der Poll T. Intravenous infusion of erythromycin inhibits CXC chemokine production, but augments neutrophil degranulation in whole blood stimulated with Streptococcus pneumoniae. J Antimicrob Chemother. 2000 Aug;46(2):235-40. doi: 10.1093/jac/46.2.235. PubMed 10933646 ↗
  • Kanoh S, Rubin BK. Mechanisms of action and clinical application of macrolides as immunomodulatory medications. Clin Microbiol Rev. 2010 Jul;23(3):590-615. doi: 10.1128/CMR.00078-09. PubMed 20610825 ↗
  • Karakike E, Scicluna BP, Roumpoutsou M, Mitrou I, Karampela N, Karageorgos A, Psaroulis K, Massa E, Pitsoulis A, Chaloulis P, Pappa E, Schrijver IT, Frantzeskaki F, Lada M, Dauby N, De Bels D, Floros I, Anisoglou S, Antoniadou E, Patrani M, Vlachogianni G, Mouloudi E, Antoniadou A, Grimaldi D, Roger T, Wiersinga WJ, Tsangaris I, Giamarellos-Bourboulis EJ. Effect of intravenous clarithromycin in patients with sepsis, respiratory and multiple organ dysfunction syndrome: a randomized clinical trial. Crit Care. 2022 Jun 18;26(1):183. doi: 10.1186/s13054-022-04055-4. PubMed 35717241 ↗

Individual participant data

Plan to share: No

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Dec 22, 2020, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03345992
Lead sponsor
Hellenic Institute for the Study of Sepsis
Collaborators
European Commission
Responsible party
Sponsor
First posted
Nov 17, 2017
Start date
Dec 15, 2017
Primary completion
Sep 22, 2019
Completion
Dec 19, 2020
Last update
Dec 22, 2020

Study contacts

Apostolos Armaganidis, MD, PhD
principal investigator · National Kapodistrian University of Athens, Medical School

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Dec 2020. You cannot join it, but the record below documents what was studied.

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Studies of the drug tested here: Clarithromycin

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