A reader wrote: “Hi Ken. I take LDN. Latest research shows that it blocks TLR-9 receptor. Would the regular bad bacteria in the microbiome causing over expression of TLR-9?” [2017 study]
I did an earlier post on LDN. The LDN –> TLR9 <– Lactobacillus connections was not known then.
In researching this with the microbiome, I found:
- “Genomic DNA has been identified as an anti-inflammatory component of Lactobacillus species, the effects of which are mediated through toll-like receptor (TLR) 9. In this study, we identified 14 novel anti-inflammatory oligodeoxynucleotide (ODN) from the genomic DNA of Lactobacillus casei ” 
- Differences in TLR9-dependent inhibitory effects of H(2)O(2)-induced IL-8 secretion and NF-kappa B/I kappa B-alpha system activation by genomic DNA from five Lactobacillus species. 
The reader responded “Wow. Lactobacillus is what I am deficient in, so explains why LDN works well for me.”
Bottom Line Updated
Surveys found: Low-Dose Naltrexone: Better 62% Worst 11%;
There is now a connection established with missing lactobacillus bacteria and what LDN impacts. We have a “how it works” model.
- Definitely a thumbs up now to try.
- This is an “off-label” mechanism for naltrexone
Every drug, supplement, probiotics etc have multiple effects. We typically simplify it down to just one effect when there are many. Take aspirin — it remedy headaches. It is also a blood thinner. It is also helps with gram-negative bacterial pneumonia, User for primary and secondary prevention of preeclampsia. etc. Aspirin is a single stable chemical. Herbs and spices are complex chemical compositions. Probiotic bacteria are even more complex producing dozens of metabolites — often depending on what is available.
We have 62% being positive and 11% being negative for the impact. The 11% likely have an additional effect coming into play.