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Probiotics for Birch Pollen Allergy

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00746226
Recruitment Status : Completed
First Posted : September 3, 2008
Last Update Posted : September 3, 2008
Information provided by:

Brief Summary:

Birch pollen allergy is one of the most common forms of respiratory allergy in the Nordic countries. Treatment consists of antihistamine use. Specific probiotic strains have been observed to modulate the immune system. Since the body has a common mucosal immune system; it was hypothesised that consumption of probiotics may affect also the respiratory mucosal immune response and hence affect respiratory allergy.

Earlier studies with probiotics had been unable to show improvements in adults with pollen allergy. It was therefore hypothesised that children, who's immune system is not yet fully developed, might be better targets.

Condition or disease Intervention/treatment Phase
Rhinitis, Allergic, Seasonal Biological: Lactobacillus acidophilus and Bifidobacterium lactis Biological: Placebo Phase 1 Phase 2

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 47 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Probiotic Intervention for Children With Birch Pollen Allergy
Study Start Date : March 2006
Actual Primary Completion Date : June 2006
Actual Study Completion Date : February 2007

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Allergy Hay Fever
Drug Information available for: Bee pollen

Arm Intervention/treatment
Active Comparator: A
Numbers 509-513, 700-709 and 900-909 Probiotic combination of L. acidophilus and B. lactis
Biological: Lactobacillus acidophilus and Bifidobacterium lactis
Daily 5x10^9 CFU of a combination of L. acidophilus and B. lactis

Placebo Comparator: B

Numbers 612-624 and 800-811

Microcrystalline cellulose

Biological: Placebo

Microcrystalline cellulose

As capsule which could be opened

Primary Outcome Measures :
  1. Birch pollen allergy symptoms [ Time Frame: March/April and June ]
  2. Nasal Eosinophilia [ Time Frame: April/May and June ]

Secondary Outcome Measures :
  1. Change in microbiota composition [ Time Frame: April/May and June ]
  2. Cytokine profile from serum [ Time Frame: April/May and June ]
  3. Faecal recovery of administered probiotics [ Time Frame: April/May and June ]

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   2 Years to 10 Years   (Child)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

Physician verified birch pollen allergy

Exclusion Criteria:

Diagnosed asthma Habitual use of probiotics and/or prebiotics

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00746226

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Turku University Central Hospital
Turku, Finland, 20250
Sponsors and Collaborators
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Study Chair: Arthur C Ouwehand, PhD Danisco
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Responsible Party: E. Isolauri Professor, Turku University Central Hospital Identifier: NCT00746226    
Other Study ID Numbers: Danisco - TBPA06
First Posted: September 3, 2008    Key Record Dates
Last Update Posted: September 3, 2008
Last Verified: September 2008
Keywords provided by Danisco:
birch pollen
Additional relevant MeSH terms:
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Rhinitis, Allergic
Rhinitis, Allergic, Seasonal
Nose Diseases
Respiratory Tract Diseases
Respiratory Tract Infections
Otorhinolaryngologic Diseases
Immune System Diseases
Respiratory Hypersensitivity
Hypersensitivity, Immediate