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MEBO - UBIOME study 2018



MEBO Gut Microbiome Study
"Microbial Basis of Systemic Malodor and PATM Conditions (PATM)"
Funded by uBiome Research Grant

"Microbial Basis of Systemic Malodor and PATM Conditions (PATM)"

Dynamics of the Gut Microbiota in
Idiopathic Malodor Production

Started May 2018 - Ongoing

Current people sent kits : 100/100
3 kits per person


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TMAU Petition world
TMAU UK end total:262
TMAU UK ends 23/01/20
TMAU Petition USA end total 204
USA : Moveon open
TMAU (Dominican)
Metabolomic Profiling Study

Start : Aug 2016
Stage 1 : 27 Canadian volunteers to test
Latest click here (26 oct) :
17 samples returned

Note : Stage 1 is Canada only.
Return cut-off date : passed
Analysis can take 6/8 weeks
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Denver TMAU Test Lab survey click here
click to Read more/less

USA survey for anyone who wants to improve Denver TMAU test

begun : Dec22
end : no ending for now

A trainee genetic counselor is working at the Denver TMAU test lab. Probably as part of her training. As a project she wishes feedback on any aspect of the Denver TMAU test and process. You can fill in the survey and/or email her (email address is in survey). It's meant for USA people, but perhaps others can give their view too (as we have so few opportunities).

quote from her rareconnect post

"Hello all! I wanted to make you aware of a research study being conducted to better understand the experience and needs of individuals with trimethylaminuria with a goal of being able to create improved patient and healthcare provider education materials. Any participation is completely voluntary and all responses remain confidential. Feel free to use the contact information within the link with any questions or share the survey with others with TMAU."

see this post for more details

Sunday, January 16, 2011

New FMO3 paper in pubmed by Italian researchers

Flavin-containing monooxygenase 3 (FMO3) is the gene repsonsible for genetic trimethylaminuria (due to deficiency of), so is of great interest to this blog. New medical research papers about FMO3 are surprisingly rare, given that it metabolizes hundreds of compounds in humans and is regarded as one of the 'drug metabolizing enzymes' and hence deficiency may cause adverse drug reactions.

In this case a new paper is published by a group Italian researchers and is probably only of indirect interest to genetic TMAU cases. It seems that the researchers have come up with a way to test FMO3 reactions in bovine cells in the laboratory. Whether this is a major step or similar methods are already used is not known. It would most likely be used to test if drugs are FMO3 substrates in any way.

Only the abstract is available to view for free.

Electro-catalysis by immobilised human flavin-containing monooxygenase isoform 3 (hFMO3).
Castrignanò S, Sadeghi SJ, Gilardi G.
Department of Human and Animal Biology, University of Torino, via Accademia Albertina, 13, 10123, Torino, Italy.
Human flavin-containing monooxygenases are the second most important class of drug-metabolizing enzymes after cytochromes P450. Here we report a simple but functional and stable enzyme-electrode system based on a glassy carbon (GC) electrode with human flavin-containing monooxygenase isoform 3 (hFMO3) entrapped in a gel cross-linked with bovine serum albumin (BSA) by glutaraldehyde. The enzymatic electrochemical responsiveness is characterised by using well-known substrates: trimethylamine (TMA), ammonia (NH(3)), triethylamine (TEA), and benzydamine (BZD). The apparent Michaelis-Menten constant (K'(M)) and apparent maximum current (I'(max)) are calculated by fitting the current signal to the Michaelis-Menten equation for each substrate. The enzyme-electrode has good characteristics: the calculated sensitivity was 40.9 +/- 0.5 mA mol(-1) L cm(-2) for TMA, 43.3 +/- 0.1 mA mol(-1) L cm(-2) for NH(3), 45.2 +/- 2.2 mA mol(-1) L cm(-2) for TEA, and 39.3 +/- 0.6 mA mol(-1) L cm(-2) for BZD. The stability was constant for 3 days and the inter-electrode reproducibility was 12.5%. This is a novel electrochemical tool that can be used to investigate new potential drugs against the catalytic activity of hFMO3.

pubmed FMO3 abstract paper


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