NCT01985542

Brief Summary

Allergic rhinitis might be caused by decreased resistance of nasal barrier to allergens and other environmental insults. About 20 % of the European population suffers from pollen allergies. Birch pollen allergic rhinitis is the most common allergic disease in the Scandinavia and it exists widely also in the Central Europe. Suffering and high costs of pollen allergies may be reduced by understanding the molecular biology of the nasal barriers during allergic response. Our aim is to observe the effect of season and birch pollen immunotherapy on the molecular biology of nasal epithelium and the microbiome.

Trial Health

100
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
16

participants targeted

Target at below P25 for not_applicable

Timeline
Completed

Started May 2011

Typical duration for not_applicable

Status
completed

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Start

First participant enrolled

May 1, 2011

Completed
2.5 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

November 1, 2013

Completed
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

November 1, 2013

Completed
3 days until next milestone

First Submitted

Initial submission to the registry

November 4, 2013

Completed
11 days until next milestone

First Posted

Study publicly available on registry

November 15, 2013

Completed
7.4 years until next milestone

Results Posted

Study results publicly available

April 20, 2021

Completed
Last Updated

June 10, 2021

Status Verified

May 1, 2021

Enrollment Period

2.5 years

First QC Date

November 4, 2013

Results QC Date

March 9, 2019

Last Update Submit

May 30, 2021

Conditions

Outcome Measures

Primary Outcomes (1)

  • The Total Number of Differentially Expressed Transcripts.

    Transcriptomics are evaluated By Next Generation Sequencing. The total number of differentially expressed transcripts are defined from nasal epithelial brushing samples taken at -6 months vs. at +6 months in the two subject groups. The subject groups are the Subcutaneous immunotherapy group and No immunotherapy group.

    -6 months vs. +6 months from the starting point of birch pollen subcutaneous immunotherapy.

Secondary Outcomes (1)

  • Percentage Change in Visual Analogue Scale Scores of Symptoms

    -6 months vs. +6 months from the starting point of birch pollen subcutaneous immunotherapy.

Study Arms (2)

subcutaneous immunotherapy

ACTIVE COMPARATOR

Starts with birch pollen subcutaneous immunotherapy

Drug: birch pollen subcutaneous immunotherapy

no immunotherapy

NO INTERVENTION

not starting with birch pollen subcutaneous immunotherapy

Interventions

birch pollen subcutaneous immunotherapy

subcutaneous immunotherapy

Eligibility Criteria

Age12 Years - 50 Years
Sexall
Healthy VolunteersYes
Age GroupsChild (0-17), Adult (18-64)

You may qualify if:

  • allergic rhinoconjunctivitis of birch pollen OR healthy controls

You may not qualify if:

  • smoking, asthma, any other disease than allergic rhinoconjunctivitis, requiring constant medication

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Related Publications (2)

  • Mattila P, Renkonen J, Toppila-Salmi S, Parviainen V, Joenvaara S, Alff-Tuomala S, Nicorici D, Renkonen R. Time-series nasal epithelial transcriptomics during natural pollen exposure in healthy subjects and allergic patients. Allergy. 2010 Feb;65(2):175-83. doi: 10.1111/j.1398-9995.2009.02181.x. Epub 2009 Oct 5.

    PMID: 19804444BACKGROUND
  • Joenvaara S, Mattila P, Renkonen J, Makitie A, Toppila-Salmi S, Lehtonen M, Salmi P, Lehti S, Makinen J, Sormunen R, Paavonen T, Renkonen R. Caveolar transport through nasal epithelium of birch pollen allergen Bet v 1 in allergic patients. J Allergy Clin Immunol. 2009 Jul;124(1):135-142.e1-21. doi: 10.1016/j.jaci.2008.11.048. Epub 2009 Apr 2.

    PMID: 19344938BACKGROUND

MeSH Terms

Conditions

Rhinitis, Allergic, Seasonal

Condition Hierarchy (Ancestors)

Rhinitis, AllergicRhinitisNose DiseasesRespiratory Tract DiseasesRespiratory HypersensitivityOtorhinolaryngologic DiseasesHypersensitivity, ImmediateHypersensitivityImmune System Diseases

Results Point of Contact

Title
Dr. Sanna Salmi
Organization
Helsinki University Hospital

Study Officials

  • Sanna K Salmi, MD PhD

    Helsinki University Central Hospital

    PRINCIPAL INVESTIGATOR

Publication Agreements

PI is Sponsor Employee
No
Restrictive Agreement
No

Study Design

Study Type
interventional
Phase
not applicable
Allocation
NON RANDOMIZED
Masking
SINGLE
Who Masked
INVESTIGATOR
Purpose
BASIC SCIENCE
Intervention Model
FACTORIAL
Sponsor Type
OTHER
Responsible Party
PRINCIPAL INVESTIGATOR
PI Title
MD PhD, Docent

Study Record Dates

First Submitted

November 4, 2013

First Posted

November 15, 2013

Study Start

May 1, 2011

Primary Completion

November 1, 2013

Study Completion

November 1, 2013

Last Updated

June 10, 2021

Results First Posted

April 20, 2021

Record last verified: 2021-05

Data Sharing

IPD Sharing
Will not share

The individual participant data is not shared.