Influence of Persistent CMV-infection on Immune Senescence

NCT ID: NCT00461695

Last Updated: 2013-08-27

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE4

Total Enrollment

183 participants

Study Classification

INTERVENTIONAL

Study Start Date

2007-05-31

Study Completion Date

2010-12-31

Brief Summary

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Recent studies indicate that persistent viral infections particularly with Cytomegalovirus (CMV) might have a negative impact on immune senescence (i.e. immunocompetence of elderly individuals). We will test this hypothesis by performing a vaccination trial in healthy elderly individuals subdivided in two groups of CMV-seropositive and CMV-seronegative individuals. All individuals will be vaccinated with the currently licensed vaccine for the prevention of TBE (FSME Immun CC) which is recommended for the general population in our area. Vaccination efficacy will be monitored longitudinally concerning the TBEV-specific antibody (TBEV-neutralization, TBEV-specific ELISA) and T cell response (ELISpot, cytokine production).

Vaccination efficacy will be compared between CMV+ and CMV- individuals and correlated with the CMV-specific immune response in CMV+ individuals.

Detailed Description

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Conditions

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Immune Senescence

Keywords

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Cytomegalovirus (CMV) Tick-borne encephalitis virus (TBEV) Ageing Vaccine Immunity

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

SINGLE_GROUP

Primary Study Purpose

PREVENTION

Blinding Strategy

SINGLE

Outcome Assessors

Study Groups

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CMV-seropositive

Cytomegalovirus-seropositive individuals at screening (week 0). Intervention: Intervention: Vaccination against tick-borne encephalitis by intramuscular injection into the left (or right) deltoid muscle of 0.5 ml FSME Immun CC for adults (2.4 ug of formalin inactivated TBEV antigen) at time point 0, after 4 weeks and after 24 weeks.

Group Type OTHER

Vaccination against TBEV (FSME Immun CC)

Intervention Type BIOLOGICAL

Intramuscular injection into the left (or right) deltoid muscle of 0.5 ml FSME Immun CC for adults (2.4 ug of formalin inactivated TBEV antigen) at time point 0, after 4 weeks and after 24 weeks.

CMV-seronegative

Cytomegalovirus-seronegative individuals at screening (week 0). Intervention: Vaccination against tick-borne encephalitis by intramuscular injection into the left (or right) deltoid muscle of 0.5 ml FSME Immun CC for adults (2.4 ug of formalin inactivated TBEV antigen) at time point 0, after 4 weeks and after 24 weeks.

Group Type OTHER

Vaccination against TBEV (FSME Immun CC)

Intervention Type BIOLOGICAL

Intramuscular injection into the left (or right) deltoid muscle of 0.5 ml FSME Immun CC for adults (2.4 ug of formalin inactivated TBEV antigen) at time point 0, after 4 weeks and after 24 weeks.

Interventions

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Vaccination against TBEV (FSME Immun CC)

Intramuscular injection into the left (or right) deltoid muscle of 0.5 ml FSME Immun CC for adults (2.4 ug of formalin inactivated TBEV antigen) at time point 0, after 4 weeks and after 24 weeks.

Intervention Type BIOLOGICAL

Eligibility Criteria

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Inclusion Criteria

* Age \> 70 years
* Healthy according to a health questionnaire (completed before screening)
* TBE-Vaccination indicated (exposure to TBEV-infested ticks possible)
* Capable to make an informed decision and to understand the informed consent form
* Informed consent signed by patient and study physician

Exclusion Criteria

* Previous exposure to TBEV (natural or vaccination)
* Immunodeficiency, history of autoimmune disease or current intake of immune-modulating drugs (corticosteroids a.s.o.)
* Persistent (\> 3 months) pharmacological treatment with more than one drug of relevance (exception: combination antihypertensives)
* Contraindication for TBEV-vaccination
* Condition that would drastically interfere with clinic attendance and/or adherence to the protocol
* Past medical history or current treatment for one of the following conditions: Chronic cardiac disease (Coronary heart disease, heart failure), chronic pulmonary disease (COPD), chronic kidney disease, diabetes mellitus, previous stroke, epilepsy, Parkinsons disease, dementia
* Hemoglobin \<12 g/l
* Random plasma glucose (RPG) \> 11.1 mmol/l OR fasting plasma glucose (FPG) \> 6.9 mmol/l (FPG required, if RPG is 7.0-11.0 mmol/l)
* Calculated Creatinin-Clearance \< 50 ml/min
* TBEV-serology positive
Minimum Eligible Age

70 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Division of Infectious Diseases and Hospital Epidemiology

UNKNOWN

Sponsor Role collaborator

University of Zurich

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Urs Karrer, MD

Role: PRINCIPAL_INVESTIGATOR

University Hospital Zurich, Department of Infectious Diseases and Hospital Epidemiology

Locations

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University Hospital Zurich, Department of Infectious Diseases and Hospital Epidemiology

Zurich, , Switzerland

Site Status

Countries

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Switzerland

Other Identifiers

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CYTEL-Protocol V1.A1

Identifier Type: -

Identifier Source: org_study_id