Cytokines in Papillon-Lefèvre Syndrome

February 23, 2016 updated by: Peter Eickholz, Goethe University

Observational Study on Cytokine Production by Leukocytes of Papillon-Lefèvre Syndrome Patients and Healthy Probands in Whole Blood Cultures

Papillon-Lefèvre syndrome (PLS) is characterised by aggressively progressive periodontitis combined with palmo-plantar hyperkeratosis. It is caused by "loss of function" mutations in the cathepsin C gene. The hypothesis behind this study is that PLS patients' PMNs produce more proinflammatory cytokines to compensate for their reduced capacity to neutralize leukotoxin and to eliminate Aggregatibacter actinomycetemcomitans. Production of more interleukin (IL)-8 would result in the attraction of more PMNs. Thus, the aim of this study was to evaluate the cytokine profile in PLS patients' blood cultures.

Study Overview

Status

Completed

Conditions

Detailed Description

MATERIAL AND METHODS Materials Lipopolysaccharide (LPS; Escherichia coli, serotype R515) was purchased from Alexis (Lausen, Switzerland) and adenosine triphosphate (ATP) from Sigma (Deisenhofen, Germany). Tumor necrosis factor α (TNF-α) was kindly provided by the Knoll AG (Ludwigshafen, Germany). IL-1β was from Invitrogen/Biosource (Karlsruhe, Germany).

Patients and healthy donors Five patients with established diagnose of PLS are under periodontal treatment at the Department of Periodontology, Center for Dental, Oral, and Maxillofacial Medicine (Carolinum) of the Johann Wolfgang Goethe-University Frankfurt am Main. Antiinfective therapy with adjunctive antibiotics has been rendered to all of them and they are under regular and frequent supportive therapy. The Department of Periodontology has contact to additional 5 PLS patients that are edentulous or under periodontal therapy elsewhere. All patients underwent complete oral examinations as well as inspection of the skin of the palms and soles. Each adult patient or parents received clinical and genetic counselling, and signed a consent form, approved by the ethic committees of the Universities of Dresden and Frankfurt/Main. Clinical data and mutations of all patients have been reported before. All these patients were invited to take part in this study. Healthy donors had abstained from taking drugs for two weeks prior to the study. Due to wide spread use of oral contraceptives only male probands were chosen. The study complied with the rules of the Declaration of Helsinki and was approved by the Institutional Review Board for Human Studies of the Medical Faculty of the Johann Wolfgang Goethe-University Frankfurt/Main (Application# 31/05). All participating individuals were informed on risks and benefit as well as the procedures of the study and gave written informed consent.

Whole blood culture Heparinized blood was mixed with an equal volume of culture medium (RPMI 1640 supplemented with 25 mM HEPES (2-[4-(2-hydroxyethyl)piperazin-1-yl]ethanesulfonic acid), 100 U/ml penicillin, 100 µg/ml streptomycin) and 1 ml aliquots were transferred into loosely sealed round-bottom polypropylene tubes (Greiner, Germany). Whole blood cultures were kept at 37 oC and 5 % CO2 for the indicated time periods. Thereafter, cell-free plasma/RPMI samples were obtained by centrifugation and stored at -70oC until assessment of cytokine concentrations by enzyme linked immunosorbent essay (ELISA). Experiments were started within 60 min of blood withdrawal. Thus, the whole blood cultures consisted of the whole range of white blood cells as well as erythrocytes. Except for determination of IL-1β release, cultures were either kept as unstimulated control or stimulated with LPS (10 or 100 ng/ml), or with the combination of IL-1β plus TNF-α (50 ng/ml each) for 24h. For determination of IL-1β release, cells were kept as unstimulated control or were stimulated with Toll-like receptor 4 ligand LPS (100 ng/ml) for altogether 5h. For efficient release of IL-1β from activated cultures, LPS was combined with ATP (2 mM) which was added during the last 2h of the 5h stimulation period in order to achieve activation of the purinoreceptor P2X7.

Analysis of cytokine release by ELISA analysis Concentrations of IL-8, IL-6, interferon-inducible protein (IP)-10, interferon (IFN) gamma (Pharmingen/BD Biosciences), and IL-1β, (R&D Systems), in plasma/RPMI samples were determined by ELISA according to the manufacturers' instructions.

Statistics The individual patient or proband was defined as statistical unit. Data are shown as median with interquartile range and are presented as pg/ml (IL-1β, IL-6, IP-10) or as ng/ml (IL-8). Medians were compared between PLS patients and healthy volunteers using the non parametric Mann Whitney U test. Statistical analysis was performed using a computer program (Systat for Windows version 10.0, Systat Inc., Evanston, IL, USA).

Study Type

Observational

Enrollment (Actual)

17

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Germany
      • Frankfurt/Main, Germany, 60596
        • Department of Periodontology, Center for Dental, Oral, and Maxillofacial Medicine (Carolinum), JWG-University

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

5 patients with established diagnose of PLS are under periodontal treatment at the Department of Periodontology, Center for Dental, Oral, and Maxillofacial Medicine (Carolinum) of the JWG-University Frankfurt am Main. Antiinfective therapy with adjunctive antibiotics has been rendered to all of them and they are under regular and frequent supportive therapy. The Department of Periodontology has contact to additional 5 PLS patients that are edentulous or under periodontal therapy elsewhere.

Description

Inclusion Criteria:

  • Diagnose of PLS

Exclusion Criteria:

  • No written informed consent

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Case-Control
  • Time Perspectives: Cross-Sectional

Cohorts and Interventions

Group / Cohort
PLS patients
Eight PLS patients (one female) from 6 families.
Healthy controls
Healthy donors had abstained from taking drugs for two weeks prior to the study. Due to wide spread use of oral contraceptives only male probands were chosen.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Serum Concentrations of Interleukin (IL)-1 Beta
Time Frame: 2006
Concentrations of IL-8, IL-6, IP-10, interferon (IFN)-gamma, and IL-1 beta, in plasma/RPMI samples were determined by enzyme linked immunosorbent assay (ELISA) according to the manufacturers' instructions
2006

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Goethe University

Investigators

  • Study Chair: Peter Eickholz, Prof. Dr., JWG-University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

July 1, 2006

Primary Completion (Actual)

January 1, 2007

Study Completion (Actual)

December 1, 2009

Study Registration Dates

First Submitted

May 3, 2010

First Submitted That Met QC Criteria

May 3, 2010

First Posted (Estimate)

May 5, 2010

Study Record Updates

Last Update Posted (Estimate)

March 24, 2016

Last Update Submitted That Met QC Criteria

February 23, 2016

Last Verified

February 1, 2016

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • PLS-Cytokines

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Clinical Trials on Papillon-Lefevre Disease

Search Similar Trials

Sponsors and Collaborators

Medical Conditions

Drug Interventions

CROs by country

CROs in Serbia

Conditions

Rare Diseases

Drug Interventions

Dietary Supplements

Sponsor/Collaborators

Locations

3
Subscribe