Protocol for a clinically annotated biorepository of samples from Australian immune-compromised patients to investigate the host-microbiome interaction

Smibert, OC; Trubiano, JA; Kwong, JC; Markey, KA; Slavin, MA

Author(s): Smibert, OC; Trubiano, JA; Kwong, JC; Markey, KA; Slavin, MA;
Details: Publication Year 2024-09-12,Volume 14,Issue #9,Page e085504
Journal Title: BMJ Open
Publication Type: Protocol
Abstract: INTRODUCTION: The human gut microbiota has the potential to modulate the outcomes of several human diseases. This effect is likely to be mediated through interaction with the host immune system. This protocol details the establishment of a biorepository of clinically annotated samples, which we will use to explore correlations between the gut microbiota and the immune system of immune-compromised patients. We aim to identify microbiome-related risk factors for adverse outcomes. METHODS AND ANALYSES: This is a protocol for the development of a biorepository of clinically annotated samples collected prospectively across three centres in Melbourne, Australia. Participants will be recruited across the following clinical streams: (1) acute leukaemia and allogeneic stem cell transplant; (2) end-stage liver disease and liver transplant; (3) patients receiving any cancer immunotherapies (eg, chimeric antigen receptor therapy); (4) deceased organ donors and (5) healthy adult controls. Participants will be asked to provide paired peripheral blood and microbiota samples (stool and saliva) at either (1) single time point for healthy controls and deceased organ donors or (2) longitudinally over multiple prespecified or event-driven time points for the remaining cohorts. Sampling of fluid from bronchoalveolar lavage and colonoscopy or biopsy of tissues undertaken during routine care will also be performed. ETHICS AND DISSEMINATION: Ethical approval has been obtained from the relevant local ethics committee (The Royal Melbourne Hospital Human Research Ethics Committee). The results of this study will be disseminated by various scientific platforms including social media, international presentations and publication in peer-reviewed journals. TRIAL REGISTRATION NUMBER: ACTRN12623001105639. Date registered 20 October 2023.
Publisher: BMJ
Keywords: Humans; Australia; *Gastrointestinal Microbiome; Host Microbial Interactions/immunology; Biological Specimen Banks; Prospective Studies; Research Design; Specimen Handling/methods; Bacteriology; Immunology; Infectious diseases; Transplant medicine
Department(s): Infectious Diseases
Publisher's Version: https://doi.org/10.1136/bmjopen-2024-085504
Open Access at Publisher's Site: https://doi.org/10.1136/bmjopen-2024-085504
Terms of Use/Rights Notice: Refer to copyright notice on published article.

Creation Date: 2024-10-01 07:30:56

Last Modified: 2024-10-01 07:37:32