The Australian Research Council Longevity Intervention (ARCLI) study protocol (ANZCTR12611000487910) addendum: neuroimaging and gut microbiota protocol

Simpson, Tamara, Deleuil, Saurenne, Echeverria, Nicole, Komanduri, Mrudhula, Macpherson, Helen, Suo, Chao, Gondalia, Shakuntla, Fard, Masoumeh Tangestani, Pipingas, Andrew, Scholey, Andrew and Stough, Con 2019, The Australian Research Council Longevity Intervention (ARCLI) study protocol (ANZCTR12611000487910) addendum: neuroimaging and gut microbiota protocol, Nutrition journal, vol. 18, pp. 1-9, doi: 10.1186/s12937-018-0428-9.

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Title The Australian Research Council Longevity Intervention (ARCLI) study protocol (ANZCTR12611000487910) addendum: neuroimaging and gut microbiota protocol
Author(s) Simpson, Tamara
Deleuil, Saurenne
Echeverria, Nicole
Komanduri, Mrudhula
Macpherson, HelenORCID iD for Macpherson, Helen
Suo, Chao
Gondalia, Shakuntla
Fard, Masoumeh Tangestani
Pipingas, Andrew
Scholey, Andrew
Stough, Con
Journal name Nutrition journal
Volume number 18
Article ID 1
Start page 1
End page 9
Total pages 9
Publisher BioMed Central
Place of publication London, Eng.
Publication date 2019-01-05
ISSN 1475-2891
Keyword(s) Ageing
Magnetic resonance imaging
Magnetic resonance spectroscopy
Science & Technology
Life Sciences & Biomedicine
Nutrition & Dietetics
Summary BACKGROUND: The Australian Research Council Longevity Intervention (ARCLI) was designed to investigate the effects of two active supplements, Pycnogenol and Bacopa monnieri (CDRI08) on cognitive performance in a cohort of elderly participants. An additional antioxidant supplement has been included into the trial. A neuroimaging component has also been added to the ARCLI study to investigate the neurochemical biomarkers of oxidative stress in vivo, as well as structural and functional changes associated with ageing and oxidative stress. Faecal biomarkers of gut microflora will also be analysed to investigate if gut microbiota are associated with domains of cognition (e.g., attention, processing speed, memory), mood or other ARCLI outcome variables. The aim of this paper is to update the published methods of the ARCLI clinical trial before it is completed, and data analysis commences. METHODS: ARCLI is a randomised, placebo controlled, double-blind, now 4-arm clinical trial including neuroimaging and gut microflora sub-studies. Along with the demographic, haematological, mood, cardiovascular and cognitive assessments described in the initial protocol, 80 eligible participants from the overall study pool of ~ 400 will be recruited into the neuroimaging study and undergo scans at baseline, 3 months and 12 months. Proton magnetic resonance spectroscopy, resting state functional connectivity and arterial spin labelled perfusion sequences are neuroimaging techniques included for each MRI visit in the study. Similarly, approximately 300 participants from the main study pool will be recruited to provide faecal samples at baseline, 3 months and 12 months so that the gut microbiome can be studied. DISCUSSION: ARCLI is 12-month intervention study, currently underway with a group of older adults, investigating a range of outcomes and their association with ageing. The additional measurements in the ARCLI trial will further the understanding of the underlying mechanisms associated with healthy ageing and may provide insights into novel preventative therapeutic strategies for maintaining cognitive and brain health into old age. TRIAL REGISTRATION: Australia and New Zealand Clinical Trials Register (ANZCTR): ACTRN12611000487970 .
Language eng
DOI 10.1186/s12937-018-0428-9
Field of Research 1111 Nutrition and Dietetics
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2019, The Author(s)
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Created: Wed, 30 Jan 2019, 14:37:05 EST

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