Oral Fecal Microbiota Transplant Feasibility Study in Alzheimer's Disease

Author(s):  
Nutrients ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 690
Author(s):  
Umair Shabbir ◽  
Muhammad Sajid Arshad ◽  
Aysha Sameen ◽  
Deog-Hwan Oh

The gut microbiota (GM) represents a diverse and dynamic population of microorganisms and about 100 trillion symbiotic microbial cells that dwell in the gastrointestinal tract. Studies suggest that the GM can influence the health of the host, and several factors can modify the GM composition, such as diet, drug intake, lifestyle, and geographical locations. Gut dysbiosis can affect brain immune homeostasis through the microbiota–gut–brain axis and can play a key role in the pathogenesis of neurodegenerative diseases, including dementia and Alzheimer’s disease (AD). The relationship between gut dysbiosis and AD is still elusive, but emerging evidence suggests that it can enhance the secretion of lipopolysaccharides and amyloids that may disturb intestinal permeability and the blood–brain barrier. In addition, it can promote the hallmarks of AD, such as oxidative stress, neuroinflammation, amyloid-beta formation, insulin resistance, and ultimately the causation of neural death. Poor dietary habits and aging, along with inflammatory responses due to dysbiosis, may contribute to the pathogenesis of AD. Thus, GM modulation through diet, probiotics, or fecal microbiota transplantation could represent potential therapeutics in AD. In this review, we discuss the role of GM dysbiosis in AD and potential therapeutic strategies to modulate GM in AD.


2019 ◽  
Author(s):  
Min Wang ◽  
William Kwame Amakye ◽  
Jianing Cao ◽  
Congcong Gong ◽  
Xiaoyu Sun ◽  
...  

Abstract Background: Dysbiosis of gut microbiota is associated with the progression of beta-amyloid (Aβ) pathology in Alzheimer’s disease (AD). We aimed to identify uniform Aβ-responsible gut microbiota status as possible guideline for gut microbiota manipulation and the prediction of outcomes of microbiota targeted treatments. Six months old APP/PS1 mice from the same genetic background, housing and feeding conditions were then daily gavage with Metformin, peptides WN5 or PW5 to manipulate the gut microbiota for 12 weeks. Aβ pathology and gut microbiota were then explored and compared. Results: Fecal microbiota transplantation (FMT) from a 16 month old APP/PS1 mouse reconstituted the gut microbiota towards the donor and increased Aβ pathology in APP/PS1 mouse model. Metformin, peptides WN5 and PW5 all attenuated Aβ-plaque formation in APP/PS1 mouse model but each was associated with distinct gut microbiota status. No uniform gut microbiota pattern associated with Aβ pathology was found among different gut microbiota-targeted treatments. Conclusion: We found no uniform gut microbiota status associated with Aβ pathology suggesting gut microbiota status is not a suitable biomarker for AD diagnosis and treatment predictions. Alteration of gut microbiota in itself may not be sufficiently directly related to functional outcomes and might only be a shadow of deeper molecular mechanisms not fully understood. The findings here strongly suggested that the significance of gut microbiota alteration in disease pathology and treatment may have so far been over claimed and that interpretation of gut microbiota data should be done with utmost caution.


2018 ◽  
Vol 13 (2) ◽  
pp. 97-99 ◽  
Author(s):  
Joanne Marie Muellenbach

A Review of: Rimkeit, B.S. and Claridge, G. (2017). Peer reviewed: literary Alzheimer’s, a qualitative feasibility study of dementia-friendly book groups. New Zealand Library & Information Management Journal, 56(2), 14-22. https://figshare.com/articles/Literary_Alzheimer_s_A_qualitative_feasibility_study_of_dementia-friendly_book_groups/5715052/1   Abstract Objective – To explore how people living with dementia experience reading classic fiction in book groups and what benefits this intervention provides.  Design – Qualitative feasibility study. Setting – Day centre within a care home in the North Island of New Zealand. Subjects – Eight participants with a medical diagnosis of dementia – four community dwellers who attend day centers, and four residents of a secure dementia unit in a care home. Methods – Investigators used surveys, focus groups, and interpretative phenomenological analysis (IPA), for ideographic analysis of the data.  Main results – Following analysis of the focus book group data, three superordinate, with related subordinate, themes were found: 1) the participant as a lively reader. The participants shared childhood memories of reading and when they became adults, how they encouraged reading within the household and with their own children. Subordinate themes included: recall, liveliness of discussion, and interest in reading and book clubs; 2) the participant as guardian of the voice of Dickens. Participants believed that, when the language is simplified, the beauty and rich imagery of Dickens is lost. Subordinate themes included: oversimplifying “loses the voice of Dickens”, familiarity, and continued play on words; and 3) the participant as a discerning book reviewer. The participants offered a number of ‘dementia-friendly’ suggestions, including the use of memory aids and simplifying text. Subordinate themes were expressed as four recommendations: use cast of characters; illustrations pick up the energy of the story, but balance quantity with risk of being childish; the physical quality of the text and paper; and chunk quantity of text while keeping the style of the original author. The choice of using classic fiction that was already well known was validated by the participants, who had some preconceptions about Ebenezer Scrooge, and described him by using epithets such as mean, an old bastard, and ugly. The participants found the investigators’ adapted version to be oversimplified, as short excerpts of the original Dickens seemed to evoke emotional and aesthetic responses of appreciation. Therefore, when creating adaptations, it is important to preserve the beauty of the original writing as much as possible. Conclusion – This qualitative feasibility study has provided a better understanding of how people living with dementia experience classic fiction in shared book groups. For individuals with Alzheimer’s disease, language skills may be well-preserved until later in the disease course. For example, the focus group participants demonstrated an appreciation and command of language, as well as enthusiasm and excitement in the sharing of the original Dickens with others. They suggested the use of memory aids, such as including a cast of characters, and repeating the referent newly on each page. Participants also suggested that the adapted version be shortened, to use a large font, and to include plenty of pictures. The choice of using classic fiction was validated by the participants, as they found these tales comforting and familiar, particularly when they included such colorful characters as Ebenezer Scrooge. Finally, people living with dementia should be encouraged to enjoy books for the same reason other adults love to read – primarily for the creative process. Classic fiction may be adapted to enhance readability, but the adaptation must be done in a thoughtful manner. While memory deficits occur in Alzheimer’s disease, an appreciation of complex language may be preserved until the later disease stages.


2015 ◽  
Vol 44 (suppl 2) ◽  
pp. ii23.4-ii24
Author(s):  
C. Richardson ◽  
J. Rusted ◽  
N. Tabet

2020 ◽  
Vol 10 (11) ◽  
pp. 814
Author(s):  
Emily M. Borsom ◽  
Keehoon Lee ◽  
Emily K. Cope

The human microbiota is composed of trillions of microbial cells inhabiting the oral cavity, skin, gastrointestinal (GI) tract, airways, and reproductive organs. The gut microbiota is composed of dynamic communities of microorganisms that communicate bidirectionally with the brain via cytokines, neurotransmitters, hormones, and secondary metabolites, known as the gut microbiota–brain axis. The gut microbiota–brain axis is suspected to be involved in the development of neurological diseases, including Alzheimer’s disease (AD), Parkinson’s disease, and Autism Spectrum Disorder. AD is an irreversible, neurodegenerative disease of the central nervous system (CNS), characterized by amyloid-β plaques, neurofibrillary tangles, and neuroinflammation. Microglia and astrocytes, the resident immune cells of the CNS, play an integral role in AD development, as neuroinflammation is a driving factor of disease severity. The gut microbiota–brain axis is a novel target for Alzheimer’s disease therapeutics to modulate critical neuroimmune and metabolic pathways. Potential therapeutics include probiotics, prebiotics, fecal microbiota transplantation, and dietary intervention. This review summarizes our current understanding of the role of the gut microbiota–brain axis and neuroinflammation in the onset and development of Alzheimer’s disease, limitations of current research, and potential for gut microbiota–brain axis targeted therapies.


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