Nasal delivery of a flagellin protein (FP) in mice increased their lifespan and healthspan.
It also led to "diminished hair loss and ocular lens opacity, increased bone mineral density, improved stem cell activity, delayed thymic involution, heightened cognitive capacity, and the prevention of pulmonary lung fibrosis.
Rapamycin-like lifespan extension
The scientists used 21-month-old mice, which is roughly when age-related immunosenescence occurs in these animals. The mice were treated with FP intranasally for eight cycles. This increased lifespan in a sex-dependent manner, with female mice benefiting more. The results were remarkable, given how late in life the treatment began.
One of those aspects is reduced activity of pathogen recognition receptors (PRR). As their name suggests, PRRs’ role is to recognize pathogens and mount an immune response. While PRRs are part of the innate immune system, their dysfunction also affects adaptive immunity, such as in less efficient presentation of antigens to T cells. This might be one of the reasons why older adults show less pronounced response to COVID vaccines. Various PRR-targeting adjuvants (complementing drugs) for vaccines have been explored.
Toll-like receptors (TLRs) are probably the most important PRRs, as they recognize pathogen-associated molecular patterns (PAMPs). TLRs’ activity is blunted by aging, causing diminished vaccine response . In this new study published in Nature Communications, a group of scientists attempted to stimulate a subset of those receptors called TLR5 to alleviate age-related immunosenescence in mice.
I’d think you’d want the cell-free supernatant, especially if the bacterium itself induces TLR2 and TLR4. TLR4 is pro-inflammatory and is linked to allodynia and hyperalgesia. Definitely something I’d be careful playing with.
Theoretically you could use something like (+)-naloxone, which lacks opioid affinity while acting as a TLR4 antagonist, but this seems unnecessarily complicated and probably quite difficult to source.
Procedure for isolating cell-free supernatant.
The CFS was obtained by centrifugation at 12 000 g for 10 min, neutralised with 1 M–NaOH to a pH of 7·0, concentrated 10-fold by lyophilisation and then sterilised by filtering through a 0·22 μm filter (Minisart hydrophilic syringe filter; Sartorius Stedim Biotech GmbH). The supernatant was added at a concentration of 7 % (v/v).
I read the whole paper. No way it can be DIY-ed at home unfortunately. One would need a couple biochemists in a lab. And scouring pubmed for simpler stuff to selectively activate / up-regulate TLR5 yielded nothing but smoke and mirrors.
In addition to MSP-306, which is being developed for NASH, Medispan is also developing MSP-102 as an anti-aging drug for osteoporosis, sarcopenia, cataracts, and hair loss. MSP-102, which is being developed as an intranasal drug candidate for convenient dosing in elderly patients, has already shown multifaceted functional improvements in various animal models and a lifespan extension effect of 8% in male mice and 13% in female mice.
I did finally get a reply from the account manager for probiotics and enzymes. I know that replying to me is a poor use of her time, but her email was on the flyer. She sent me 4 more pamphlets of probiotics they sell and said this is all we sell, if you need anything else let me know. So I sent her the pamphlet for ( L. rhamnosus CNCM I-4036) and said I want this one. Lol, we’ll see if I get anything back.
Since she was kind enough to reply, I’ll try to post the 4 pamphlets she sent me: