How Differences in the Composition of Microorganisms in the Soil Affect the Microorganisms in the Human Gut, Through the Vegetables That Grow in it: a Process Pilot Study With Healthy Participants (HUMANITAS)
The Effect of Soil Biodiversity on Human Gut Microbiome: a Process Pilot Study (The HUMANITAS Study)
Przegląd badań
Status
Status
Warunki
Warunki
Interwencja / Leczenie
Interwencja / Leczenie
Szczegółowy opis
This randomized, double-blind, crossover pilot study will be used to assess the feasibility of logistics including vegetable delivery and preparation of the intervention product by the participants themselves. Besides feasibility, we will aim to identify live bacteria and fungi present in the intervention product (smoothies) and trace these back in stool samples.
The gut microbiome is also called the "second genome" to which many protective and life-supporting functions have been externalized. It orchestrates the crosstalk between our own cells and environmental metagenome. Diet and food choices can modulate gut microbiome species and functional diversity, but the mechanisms by which this occurs are unclear. The nutritional quality of crops, the crop microbiome and the soil microbiome may therefore all be involved.
Ten participants will be randomized in a cross-over design, with each participant drinking three 150 mL vegetable smoothies per day for two separate intervention weeks (HiDi vs LoDi soil origin, randomized 1 : 1). During the first week, smoothies will be prepared with the vegetables derived from microbiome-enriched soil (HiDi) or microbiome-impoverished soil (LoDi). Vegetables, a blender, and detailed instructions to prepare the smoothies on-site will be delivered to the participant. Each participant is asked to keep a diary (in the form of a daily Castor questionnaire), with special attention to dietary habits and intake. Furthermore, before and after this specified diet week, blood and stool samples will be collected. After a washout period of two weeks, participants will be offered identical meals in a crossover design.
Typ studiów
Typ studiów
Zapisy (Szacowany)
Zapisy
Faza
Faza
- Nie dotyczy
Kontakty i lokalizacje
Kontakt w sprawie studiów
Kontakt w sprawie studiów
- Nazwa: Jeroen Maljaars, MD, PhD
- Numer telefonu: +31 71 526 3575
- E-mail: P.W.J.Maljaars@lumc.nl
Kopia zapasowa kontaktu do badania
- Nazwa: Maarten Tushuizen, MD, PhD
- Numer telefonu: +31 71 526 9111
- E-mail: M.E.Tushuizen@lumc.nl
Lokalizacje studiów
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South Holland
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Leiden, South Holland, Holandia, 2333ZA
- Leids Universitair Medisch Centrum
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Kontakt:
- Jeroen Maljaars, MD, PhD
- Numer telefonu: +31 71 526 9111
- E-mail: P.W.J.Maljaars@lumc.nl
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Główny śledczy:
- Jeroen Maljaars, MD, PhD
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-
Kryteria uczestnictwa
Kryteria kwalifikacji
Kryteria kwalifikacji
Wiek uprawniający do nauki
- Dorosły
- Starszy dorosły
Akceptuje zdrowych ochotników
Opis
Inclusion Criteria:
- Aged 18 to 70 years
- Written informed consent
- Inhabitant of Leiden
Exclusion Criteria:
- Any documented causes of chronic disease
- Suspicion of or present excessive alcohol use defined as >2 units/day (>14/week)
- Recent use (<3 months) of antibiotics
- Any known food allergy or restriction, or following a vegan/vegetarian diet
- Use of possible drugs interfering microbiota or recent (< 3 months) changes in dosages
- A psychiatric, addictive or any other disorder that compromises the participants ability to understand the study content and to give written informed consent for participation in the study
Plan studiów
Jak projektuje się badanie?
Szczegóły projektu
- Główny cel: Zapobieganie
- Przydział: Randomizowane
- Model interwencyjny: Zadanie krzyżowe
- Maskowanie: Potroić
Liczba ramion
Broń i interwencje
Grupa uczestników / ArmGrupa uczestników / Arm |
Interwencja / LeczenieInterwencja / Leczenie |
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Aktywny komparator: Crops derived from Low followed by High diversity soil
Participants will be given vegetables, originating from low- or high-microbial diversity soil, to prepare smoothies with.
In this arm participants start with vegetables from a low diversity soil, after a washout period of two weeks they will receive vegetables from a high diversity soil.
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Vegetable smoothie prepared with crops grown in low-microbial diversity soil
Vegetable smoothie prepared with crops grown in high-microbial diversity soil
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Aktywny komparator: Crops derived from High followed by Low diversity soil
Participants will be given vegetables, originating from low- or high-microbial diversity soil, to prepare smoothies with.
In this arm participants start with vegetables from a high diversity soil, after a washout period of two weeks they will receive vegetables from a low diversity soil.
|
Vegetable smoothie prepared with crops grown in low-microbial diversity soil
Vegetable smoothie prepared with crops grown in high-microbial diversity soil
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Co mierzy badanie?
Podstawowe miary wyniku
Podstawowe miary wyniku
Miara wyniku |
Opis środka |
Ramy czasowe |
|---|---|---|
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Feasibility of logistics of the study protocol: Deliveries
Ramy czasowe: From start enrollment to the end of treatment at 4 weeks
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The percentage of successful deliveries to the participants in the pre-agreed time window.
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From start enrollment to the end of treatment at 4 weeks
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Feasibility of logistics of the study protocol: Preparation of the intervention product
Ramy czasowe: From the start of the treatment period until the end at 4 weeks
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Using the Daily diary (Castor questionnaire), successful preparation of the intervention product is assessed.
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From the start of the treatment period until the end at 4 weeks
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Feasibility of logistics of the study protocol: Recruitment rate
Ramy czasowe: From the start of recruitment until the start of the study
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Number of recruited participants per month until the start of the study.
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From the start of recruitment until the start of the study
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Tracing back life microorganisms from the smoothie in stool samples
Ramy czasowe: Day 1, Day 7, Day 22, and Day 28
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Life bacteria present in the smoothies will be cultured and sequenced to then compare to feces samples of participants
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Day 1, Day 7, Day 22, and Day 28
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Miary wyników drugorzędnych
Miary wyników drugorzędnych
Miara wyniku |
Opis środka |
Ramy czasowe |
|---|---|---|
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Participant compliance to the study protocol
Ramy czasowe: From start enrolment until the end of treatment at the end of 4 weeks
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Compliance with the protocol will be assessed through the daily lifestyle diary (in the form of a Castor questionnaire).
Which will capture the number of consumed smoothies (≥95.2%) and number of consumed smoothies at the correct time window (≥80%).
As well whether the duration and time of exercise (≥80%), duration and time of nighttime sleeping period (≥80%), timing and content of main meals (≥80%) between the two periods are comparable.
For each of the parameters the compliance threshold is indicated above.
Based on these parameters we will get a percentage of participants that were compliant.
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From start enrolment until the end of treatment at the end of 4 weeks
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Shifts in gut microbiome composition
Ramy czasowe: Baseline, Day 8, Day 21, and Day 29
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Metagenomics will be performed on feces samples from participants to get an compositional view of the gut microbiome.
Samples will be taken at baseline, Day 8, Day 21, and Day 29
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Baseline, Day 8, Day 21, and Day 29
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Sample completeness
Ramy czasowe: From start of treatment to the end of treatment at 4 weeks
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percentage of complete sampling sets
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From start of treatment to the end of treatment at 4 weeks
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Asses willingness of participants to create their own intervention product
Ramy czasowe: From start treatment to end of treatment at 4 weeks
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Using the Daily diary (Castor questionnaire), the participants are required to fill in their opinion on creating their own intervention product on a daily basis.
This is measured on a 10 point scale, with 1 being equal to never wanting to do it again and 10 being equal to enjoying it.
There is also an optional open question where participants can justify their answer.
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From start treatment to end of treatment at 4 weeks
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Differences in phytonutrient levels in serum
Ramy czasowe: Baseline, Day 8, Day 21, and Day 29
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After confirmation of significant changes in gut microbiome composition, phytonutrient levels will be measured in serum.
Serum will be collected at Baseline, Day 8, Day 21, and Day 29
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Baseline, Day 8, Day 21, and Day 29
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Współpracownicy i badacze
Sponsor
Sponsor
Współpracownicy
Współpracownicy
Publikacje i pomocne linki
Publikacje ogólne
- David LA, Maurice CF, Carmody RN, Gootenberg DB, Button JE, Wolfe BE, Ling AV, Devlin AS, Varma Y, Fischbach MA, Biddinger SB, Dutton RJ, Turnbaugh PJ. Diet rapidly and reproducibly alters the human gut microbiome. Nature. 2014 Jan 23;505(7484):559-63. doi: 10.1038/nature12820. Epub 2013 Dec 11.
- Albenberg LG, Wu GD. Diet and the intestinal microbiome: associations, functions, and implications for health and disease. Gastroenterology. 2014 May;146(6):1564-72. doi: 10.1053/j.gastro.2014.01.058. Epub 2014 Feb 4.
- Henao-Mejia J, Elinav E, Jin C, Hao L, Mehal WZ, Strowig T, Thaiss CA, Kau AL, Eisenbarth SC, Jurczak MJ, Camporez JP, Shulman GI, Gordon JI, Hoffman HM, Flavell RA. Inflammasome-mediated dysbiosis regulates progression of NAFLD and obesity. Nature. 2012 Feb 1;482(7384):179-85. doi: 10.1038/nature10809.
- Clemente JC, Ursell LK, Parfrey LW, Knight R. The impact of the gut microbiota on human health: an integrative view. Cell. 2012 Mar 16;148(6):1258-70. doi: 10.1016/j.cell.2012.01.035.
- Turnbaugh PJ, Backhed F, Fulton L, Gordon JI. Diet-induced obesity is linked to marked but reversible alterations in the mouse distal gut microbiome. Cell Host Microbe. 2008 Apr 17;3(4):213-23. doi: 10.1016/j.chom.2008.02.015.
- Julious, S.A. (2005), Sample size of 12 per group rule of thumb for a pilot study. Pharmaceut. Statist., 4: 287-291. https://doi.org/10.1002/pst.185
- Sanna S, van Zuydam NR, Mahajan A, Kurilshikov A, Vich Vila A, Vosa U, Mujagic Z, Masclee AAM, Jonkers DMAE, Oosting M, Joosten LAB, Netea MG, Franke L, Zhernakova A, Fu J, Wijmenga C, McCarthy MI. Causal relationships among the gut microbiome, short-chain fatty acids and metabolic diseases. Nat Genet. 2019 Apr;51(4):600-605. doi: 10.1038/s41588-019-0350-x. Epub 2019 Feb 18.
- Hirt H. Healthy soils for healthy plants for healthy humans: How beneficial microbes in the soil, food and gut are interconnected and how agriculture can contribute to human health. EMBO Rep. 2020 Aug 5;21(8):e51069. doi: 10.15252/embr.202051069. Epub 2020 Jul 31.
- Blum WEH, Zechmeister-Boltenstern S, Keiblinger KM. Does Soil Contribute to the Human Gut Microbiome? Microorganisms. 2019 Aug 23;7(9):287. doi: 10.3390/microorganisms7090287.
- Fierer N. Embracing the unknown: disentangling the complexities of the soil microbiome. Nat Rev Microbiol. 2017 Oct;15(10):579-590. doi: 10.1038/nrmicro.2017.87. Epub 2017 Aug 21.
- Leeming ER, Louca P, Gibson R, Menni C, Spector TD, Le Roy CI. The complexities of the diet-microbiome relationship: advances and perspectives. Genome Med. 2021 Jan 20;13(1):10. doi: 10.1186/s13073-020-00813-7.
- Johnson AJ, Zheng JJ, Kang JW, Saboe A, Knights D, Zivkovic AM. A Guide to Diet-Microbiome Study Design. Front Nutr. 2020 Jun 12;7:79. doi: 10.3389/fnut.2020.00079. eCollection 2020.
Daty zapisu na studia
Główne daty studiów
Rozpoczęcie studiów (Szacowany)
Rozpoczęcie studiów
Zakończenie podstawowe (Szacowany)
Zakończenie podstawowe
Ukończenie studiów (Szacowany)
Ukończenie studiów
Daty rejestracji na studia
Pierwszy przesłany
Pierwszy przesłany
Pierwszy przesłany, który spełnia kryteria kontroli jakości
Pierwszy przesłany, który spełnia kryteria kontroli jakości
Pierwszy wysłany (Rzeczywisty)
Pierwszy wysłany
Aktualizacje rekordów badań
Ostatnia wysłana aktualizacja (Rzeczywisty)
Ostatnia wysłana aktualizacja
Ostatnia przesłana aktualizacja, która spełniała kryteria kontroli jakości
Ostatnia przesłana aktualizacja, która spełniała kryteria kontroli jakości
Ostatnia weryfikacja
Ostatnia weryfikacja
Więcej informacji
Terminy związane z tym badaniem
Słowa kluczowe
Inne numery identyfikacyjne badania
Inne numery identyfikacyjne badania
- NL-010026
Plan dla danych uczestnika indywidualnego (IPD)
Planujesz udostępniać dane poszczególnych uczestników (IPD)?
Opis planu IPD
Ramy czasowe udostępniania IPD
Typ informacji pomocniczych dotyczących udostępniania IPD
- PROTOKÓŁ BADANIA
- ANALITYCZNY_KOD
Informacje o lekach i urządzeniach, dokumenty badawcze
Bada produkt leczniczy regulowany przez amerykańską FDA
Bada produkt urządzenia regulowany przez amerykańską FDA
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