- ICH GCP
- Amerikanska kliniska prövningsregistret
- Klinisk prövning NCT03049579
Immune System Stimulation by Probiotic Food Supplementation
Immune System Stimulation by Probiotic Food Supplementation: a Double-blind, Randomized, Controlled, Parallel-designed, Prospective Trial
The purpose of this study is to investigate the effects of a probiotic supplementation on adult volunteers with having caught the common cold more than 4 times in the past year. This study is a single center, double-blind, randomized, controlled, parallel-designed, prospective trial. Subjects received a probiotic drink containing probiotics of Lactobacillus paracasei (108 colony forming units (CFU)/ml), Lactobacilluscasei431® (108CFU/ml) and Lactobacillus fermentiumPCC® (106CFU/ml) or an identical placebo without probiotics for a 12-week study period.
The incidence of flue and cold during the study period were compared between study groups.
Blood and fecal samples were collected at baseline and at the end of the intervention. Fecal samples were collected for the secretory immunoglobulin A (sIgA) analysis. Blood sample was drawn for interferon γ (IFN-γ), interleukin 4 (IL-4), interleukin 10 (IL-10), immunoglobulin A (IgA), immunoglobulin G (IgG) and immunoglobulin M (IgM) analysis.
Studieöversikt
Status
Betingelser
Intervention / Behandling
Studietyp
Inskrivning (Faktisk)
Fas
- Inte tillämpbar
Deltagandekriterier
Urvalskriterier
Åldrar som är berättigade till studier
Tar emot friska volontärer
Kön som är behöriga för studier
Beskrivning
Inclusion Criteria:
- male or female between 25 to 45 years old;
- having caught the common cold or flu at least 4 to 6 times in the past calendar year;
- signed the informed consent forms before entering the study;
- fully understood the risks and potential benefits in participating this study.
Exclusion Criteria:
- were diagnosed with the decreased immunity caused by any diagnosed chronic illness;
- having any gastrointestinal illness with medical treatment at the time of being enrolled;
- having any diagnosed respiratory illness with similar symptoms as the common cold and flu;
- currently taking any pain killer drug;
- having received any vaccine for the upper respiratory infection within 6 months before enrollment;
- having received any purgative drug or digestion related drug within 2 weeks before enrollment;
- having taken any dairy product containing prebiotics and probiotics within 10 days before enrollment;
- currently taking any preventive drug for upper respiratory infection;
- having received any drug which has impact with the immune system such as antibiotics within 3 months before enrollment;
- alcoholic or addicted to any drug;
- pregnant or breastfeeding mothers;
- having participated another clinical trial within 3 months before enrollment.
Studieplan
Hur är studien utformad?
Designdetaljer
- Primärt syfte: Förebyggande
- Tilldelning: Randomiserad
- Interventionsmodell: Parallellt uppdrag
- Maskning: Trippel
Vapen och interventioner
Deltagargrupp / Arm |
Intervention / Behandling |
|---|---|
|
Experimentell: Weiquan Yogurt with probiotics
Weiquan Yogurt with probiotics contained Lactobacillus paracasei (108 colony forming units (CFU)/ml), Lactobacillus casei 431® (108 CFU/ml) and Lactobacillus fermentum PCC® (106 CFU/ml)
|
150 ml daily consumption for a total of 12 weeks
|
|
Placebo-jämförare: Weiquan Yogurt without probiotics
Weiquan Yogurt devoid of probiotics, but otherwise similar to the experimental product.
|
150 ml daily consumption for a total of 12 weeks
|
Vad mäter studien?
Primära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
|
Incidence of flue symptoms during the study
Tidsram: end of week 12
|
Body temperature≥38.0℃,
and have one or more symptoms of cough, runny nose, throat pain, headache, muscle pain, weak feeling, hard to breath, chest pain or loss of appetite.
|
end of week 12
|
Sekundära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
|
Incidence of cold symptoms during the study
Tidsram: end of week 12
|
Body temperature<38.0℃,
and have one or more symptoms of cough, runny nose, throat pain, headache, muscle pain, weak feeling, hard to breath, chest pain or loss of appetite.
|
end of week 12
|
|
Number of accumulated days of having cold symptoms during the study
Tidsram: End of week 12
|
The total number of days of having one or more symptoms of cough, runny nose, throat pain, headache, muscle pain, weak feeling, hard to breath, chest pain or loss of appetite during the 12 week study period.
|
End of week 12
|
|
Serum IFN-γ concentration
Tidsram: Baseline, end of week 12
|
Interferon gamma (unit: pg/ml)
|
Baseline, end of week 12
|
|
Serum IL-4 concentration
Tidsram: Baseline, end of week 12
|
Interleukin 4 (unit: ng/ml)
|
Baseline, end of week 12
|
|
Serum IL-10 concentration
Tidsram: Baseline, end of week 12
|
Interleukin 10 (unit: pg/ml)
|
Baseline, end of week 12
|
|
Serum IgA concentration
Tidsram: Baseline, end of week 12
|
Immunoglobulin A (unit: g/L)
|
Baseline, end of week 12
|
|
Serum IgG concentration
Tidsram: Baseline, end of week 12
|
Immunoglobulin G (unit: g/L)
|
Baseline, end of week 12
|
|
Serum IgM concentration
Tidsram: Baseline, end of week 12
|
Immunoglobulin M (unit: g/L)
|
Baseline, end of week 12
|
|
Fecal sIgA concentration
Tidsram: Baseline, end of week 12
|
Secretory Immunoglobulin A (unit: ng/ml)
|
Baseline, end of week 12
|
Samarbetspartners och utredare
Studieavstämningsdatum
Studera stora datum
Studiestart (Faktisk)
Primärt slutförande (Faktisk)
Avslutad studie (Faktisk)
Studieregistreringsdatum
Först inskickad
Först inskickad som uppfyllde QC-kriterierna
Första postat (Faktisk)
Uppdateringar av studier
Senaste uppdatering publicerad (Faktisk)
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
Senast verifierad
Mer information
Termer relaterade till denna studie
Andra studie-ID-nummer
- 15-SC-09-WQ-002
Plan för individuella deltagardata (IPD)
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