Baseline Assessment of Skin Resident Memory T Cells in Healthy Unvaccinated Participants
Baseline Assessment of Skin Resident Memory T Cells in Healthy Unvaccinated Participants (GeKoSkimm-Unvaccinated): add-on Study to the GeKoSkimm Trial (= A Randomized Controlled Trial to Compare the Immunogenicity and Skin Imprinting of Intradermal, Subcutaneous and Intramuscular Yellow Fever Vaccination)
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Detaljeret beskrivelse
Undersøgelsestype
Undersøgelsestype
Tilmelding (Anslået)
Tilmelding
Fase
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiekontakt
Studiekontakt
- Navn: Prof. Dr. Patrick Soentjens
- Telefonnummer: +3232476641
- E-mail: psoentjens@itg.be
Undersøgelse Kontakt Backup
- Navn: Wim Adriaensen
- E-mail: wadriaensen@itg.be
Studiesteder
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Antwerp, Belgien
- Rekruttering
- Clinical Trial Site of the Institute of Tropical Medicine
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Kontakt:
- Yven Van Herrewege
- Telefonnummer: +3232476557
- E-mail: yvanherrewege@itg.be
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Kontakt:
- Jorge Reis Guerreiro
- E-mail: jreis@itg.be
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Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
- Voksen
Tager imod sunde frivillige
Beskrivelse
Inclusion Criteria:
- BMI >/=18,5 kg/m2 and ≤35 kg/m2
- Agreement to share and discuss participant's medical history and medical records when relevant with the study team
- Able and willing to provide written informed consent
- Agreement to refrain from blood donation and other vaccinations during the study
Exclusion Criteria:
- Participants with a confirmed flavivirus infection in the past
- Participants who received a flavivirus vaccination prior to enrolment (e.g. YFV, Japanese encephalitis virus, tick-borne encephalitis virus, Dengue)
- Receipt of any vaccine (licensed or experimental) within 30 days prior to enrolment or during the study
- Active participation in another interventional clinical study with active substance intake or large medical procedures affecting the study procedures during or 1 month prior to enrolment
- Participant has a clinically significant acute illness (this does not include minor illnesses such as diarrhea or mild upper respiratory tract infection) or temperature ≥38.0ºC within 24 hours prior to the visit; inclusion at a later date is permitted at the discretion of the investigator
- Any confirmed or suspected immunosuppressive or immunodeficient state (incl. cancer and human immunodeficiency virus/hepatitis B virus infection); asplenia; recurrent severe infections and use of immunosuppressant medication (including antineoplastic and immunomodulating agents or radiotherapy) within the last 6 months prior to enrolment, except topical or short-term oral steroids (<2 weeks of daily receipt of 20 mg of prednisone or equivalent). Refer to annex 1 for a list of immunosuppressive medication
- Severe and/or uncontrolled cardiovascular disease, respiratory disease, gastrointestinal disease, liver disease, renal disease, endocrine disorder, psychiatric and neurological illness (mild/moderate well controlled comorbidities are allowed)
- History of bleeding disorder (e.g. factor deficiency, coagulopathy or platelet disorder), or prior history of significant bleeding or bruising following venipuncture
- Any significant disease, disorder or planned surgery which may affect the ability of the volunteer to participate in the study or impact (skin) immunity homeostasis
- Suspected or known alcohol or drug dependency
- Known pregnancy
- Tendency to keloid (scar) formation in response to skin damage
- Skin diseases or tattoo at the biopsy site
- In the opinion of the investigator, unlikely compliance to the requirements of the study
- History of thymus dysfunction (including myasthenia gravis, thymoma) or thymectomy
- Individuals who are working at the investigational site or within the research team of this study
- Participants who received immunoglobulins and/or any blood or blood derived products within 3 months preceding the study
- Participants who are currently on anticoagulant therapy
- Participants who are continuously using systemic antivirals
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Andet
- Tildeling: N/A
- Interventionel model: Enkelt gruppeopgave
- Maskning: Ingen (Åben etiket)
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
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Andet: Healthy unvaccinated participants against yellow fever virus
Healthy participants that have not been vaccinated against yellow fever virus
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2 x 4mm skin punch biopsies in the upper arm will be taken from each participant at visit 2 with additional microsampling (microbiopsy and wound blood sampling)
Blood sampling of 15 mL (10mL Lithium-Heparine + 5 mL SST) is performed on Visit 1 to confirm their vaccination status regarded to yellow fever
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Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Estimate the baseline number and proportion of skin-resident memory T cells against YFV (YFV-TRM) in the skin of unvaccinated and healthy volunteers against YFV
Tidsramme: Day 14 (Visit 2)
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The number and proportion of YFV-specific T cells within the skin-resident lymphocyte parent population at visit 2, measured by flow cytometry.
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Day 14 (Visit 2)
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Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Estimate the baseline number and proportion of circulating effector- (YFV-TEM) and central-memory T cells against YFV (YFV-TCM) in the blood of unvaccinated and healthy volunteers against YFV
Tidsramme: Day 0 (Visit 1)
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The number and proportion of circulating YFV-specific TCM and TEM cells within the CD3+ lymphocyte parent population at visit 1
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Day 0 (Visit 1)
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Andre resultatmål
Andre resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Describe the spatially-resolved position of TRM cells in the skin of unvaccinated and healthy volunteers against YFV
Tidsramme: D14 (Visit 2)
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Spatially-resolved YFV-specific TCR clonotypes in the skin at visit 2
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D14 (Visit 2)
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Determine the baseline TCR diversity index in the skin of unvaccinated healthy volunteers against YFV
Tidsramme: Day 14 (Visit 2)
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TCR diversity index in the skin at visit 2
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Day 14 (Visit 2)
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Estimate the baseline cytokine and chemokine concentrations in capillary blood, and microbiopsies of unvaccinated and healthy volunteers against YFV
Tidsramme: Day 14 (Visit 2)
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The number of cytokine and chemokine concentrations (ng/ul) in capillary blood, and microbiopsies at visit 2
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Day 14 (Visit 2)
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Estimate the baseline YFV-specific IgG/IgM levels in capillary blood of unvaccinated and healthy volunteers
Tidsramme: Day 14 (Visit 2)
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IgG/IgM levels (mean fluorescence intensity) in capillary blood at visit 2
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Day 14 (Visit 2)
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Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Datoer for undersøgelser
Studer store datoer
Studiestart (Faktiske)
Studiestart
Primær færdiggørelse (Anslået)
Primær færdiggørelse
Studieafslutning (Anslået)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Yderligere relevante MeSH-vilkår
- Vektorbårne sygdomme
- Myggebårne sygdomme
- Infektioner
- RNA-virusinfektioner
- Virussygdomme
- Arbovirus infektioner
- Flavivirus infektioner
- Flaviviridae infektioner
- Hæmoragiske feber, viral
- Gul feber
- Undersøgelsesteknikker
- Håndtering af eksemplar
- Kliniske laboratorieteknikker
- Diagnostiske teknikker og procedurer
- Diagnose
- Punkteringer
- Kirurgiske procedurer, operative
- Blodprøveopsamling
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- 1966/25
Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter
Studerer et amerikansk FDA-reguleret lægemiddelprodukt
Studerer et amerikansk FDA-reguleret enhedsprodukt
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