Effect of a L. Paracasei Strain on Grass Pollen Allergic Rhinitis Subjects

This study has been completed.
Information provided by (Responsible Party):
ClinicalTrials.gov Identifier:
First received: November 2, 2010
Last updated: March 4, 2014
Last verified: March 2014
Various studies in animal and humans have shown a potential beneficial effect of probiotics consumption on allergy. However few studies exist that document their efficacy for upper airways allergies such as allergic rhinitis. The objective of this study is to investigate the effect of short-term oral administration of a L. paracasei or of a blend of 2 probiotics (L. acidophilus + B. lactis) on a nasal provocation test (NPT) with grass pollen, performed out of the pollen season. Adult volunteers with allergic rhinitis are enrolled in a randomized, double-blind study, based on two 4-weeks cross-over periods of product consumption separated by a washout period of 6-8 weeks. Objective and subjective clinical parameters of NPT as well as systemic and nasal immunological markers are compared before and after each treatment.

Condition Intervention
Allergic Rhinitis
Dietary Supplement: probiotic

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor)
Primary Purpose: Treatment

Further study details as provided by Nestlé:

Primary Outcome Measures:
  • Nasal reaction threshold when provocation test with allergens [ Time Frame: 4 weeks ] [ Designated as safety issue: No ]

Enrollment: 30
Study Start Date: October 2007
Study Completion Date: June 2008
Primary Completion Date: March 2008 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: L. paracasei
L. paracasei
Dietary Supplement: probiotic
Experimental: L. acidophilus + B. lactis
L. acidophilus + B. lactis
Dietary Supplement: probiotic


Ages Eligible for Study:   18 Years to 40 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • age 18-40 years old
  • history of allergic rhinitis during the latest grass pollen season confirmed by a positive skin prick test to grass pollen (wheal diameter > 3mm) and a positive response to a NPT with grass pollen (combined nasal reaction threshold <= 10000 standardized quality units/ml at the screening phase

Exclusion Criteria:

  • any medical condition that could influence the study (pregnancy, viral or bacterial airway infection, active allergic rhinitis)
  • uncontrolled asthma (peak expiratory flow <20% of volunteer's best personal value)
  • treatment with antihistamine or antibiotic treatment less than two weeks before enrolment or during the trial
  Contacts and Locations
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, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT01233154

Centre Hospitalier Universitaire Vaudois
Lausanne, Switzerland, 1011
Sponsors and Collaborators
  More Information

Responsible Party: Nestlé
ClinicalTrials.gov Identifier: NCT01233154     History of Changes
Other Study ID Numbers: 07.27.NRC 
Study First Received: November 2, 2010
Last Updated: March 4, 2014
Health Authority: Switzerland: Swissmedic

Additional relevant MeSH terms:
Nose Diseases
Otorhinolaryngologic Diseases
Respiratory Tract Diseases
Respiratory Tract Infections

ClinicalTrials.gov processed this record on May 04, 2016