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Efficacy of Pediococcus acidilactoci K15 strain on allergic symptoms related to Japanese cedar pollinosis induced by artificial exposure

Efficacy of Pediococcus acidilactoci K15 strain on allergic symptoms related to Japanese cedar pollinosis induced by artificial exposure: A randomised placebo-controlled trial

Status
Active, not recruiting
Phases
Phase 2
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCTs051190046
Enrollment
30
Registered
2019-09-06
Start date
2019-09-06
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Japanese cedar pollinosis

Interventions

K15 Pediococcus acidilactici

Sponsors

Yamamoto Masashi
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1.individuals aged from 20 to 64 who will give informed consent upon their will 2.individuals who had allergic symptoms such as sneezing, rhinorrhea, nasal obstruction and eye itching during Japanese cedar pollen dispersal season in the past two consecutive years 3.individuals who show positive IgE titer more than class II for Japanese cedar pollen by RAST

Exclusion criteria

Exclusion criteria: 1.individuals receiving allergen (Japanese cedar pollen) immunotherapy or those who will receive allergen immunotherapy during the study 2.individuals with active diseases and judged to be inappropriate to join the study by their primary care physicians 3.individuals who are pregnant and brest-feeding or will have a plan of pregnancy during the study 4.individuals who habitually intake prebiotics or probiotics (more than 3 days in a week) 5.individuals who join other clinical studies 6.individuals who take anti-allergic drugs before or during the study

Design outcomes

Primary

MeasureTime frame
Total nasal symptom score (Severity of allergic symptoms induced by artificial Japanese cedar dispersal evaluated by scoring system), VAS score of symptomatic severity

Secondary

MeasureTime frame
Severity of rhinitis, Severity of conjunctivitis, objective nasal mucosal findings, amounts of nasal discharge

Contacts

Public ContactKayoko Kawashima

Osaka Habikino Medical Center

k.kawashima@ra.opho.jp+81-72-957-2121

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026