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Cake day: June 13th, 2023

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  • That’s fair. I couldn’t find much info on their website, so I assumed this was another make insulin cheap using “biohacking” deal. I don’t have any experience with small molecule synthesis or dry powder manufacturing, so I can’t really speak to how feasible this may be. However, having seen first-hand all the ways simple manufacturing steps can go wrong, the risk of consuming a medication that hasn’t been through rigorous QA/QC makes me very wary.


  • Apologies for the long post. I don’t mean this as an attack on OP, just trying to illustrate why actually doing this is a bad idea.

    I have seen efforts like this in the past, especially centered around efforts to manufacture insulin cheaply. While I get that medicine cost and availability is broken at a fundamental level in the US, the solution is a political one rather than to run a wildcat bioreactor. There is simply no way to safely manufacture biologics using a 3d printed bioreactor. Let’s look at the manufacturing process to get an idea of why.

    Staring with the bioreactor, you would need some way to sterilize it before use (not just sanitize, there’s a difference). There are plastic bioreactors that are used in industry, but they are large, single-use bags that are sterilized using gamma or x-ray radiation. Most industry bioreactors are made of stainless steel to withstand the harsh treatment required to re-sterilize them (steam or hydrogen peroxide).

    Moving down the chain from the bioreactor, you need some way to remove your product from the harvested liquid. This is usually done through lysing the cells you have grown and then running this lysate through a series of chromatography columns of varying types (affinity, ionic, etc.) to systematically remove all the junk left over from your cellular media and the cells you have lysed. Even if you could (unsafely) grow your cells and drug in a 3d printed bioreactor, you don’t have these kinds of things at home and can’t just get them from Amazon.

    However, let’s say that you could get past the purification step, what’s next? You find yourself with a large volume of very dilute medicine suspended in a chromatography buffer. The next step is what is called UF/DF, or ultra-filtration/dia-filtration. This step, paradoxically done DF first, uses filter membranes and large amounts of buffer and some pressure to first swap out the buffer that your medicine is in to the target formulation that you want to inject and then concentrate it down to a manageable volume. If you are working at small scale, then you can probably replace this step with just one filter and a centrifuge. Remember that while you are doing all this, everything that comes into contact with your drug needs to be sterile (even the air).

    I think I have made my point, but for actual drugs there are more steps beyond this. Post-UF/DF is what is referred to as drug substance (DS) in the industry. You still need to go through a sterile fill-finish process to get drug product (DP) that is what is actually given to a patient. If you really want, I can go on another long tirade here since this is the step my job focuses on.

    I have worked on these manufacturing processes and seen them fail a lot for very hard to catch problems. Without all the in-process controls and testing we do, there would have been serious risks of giving bad DP to patients. If you have read this far, then I hope I’ve convinced you not to give this kind of thing a try.

    The real problem this is trying to solve is a political one. We should be advocating for better access to medications and reforming how costs are dealt with. It doesn’t matter what your political persuasion is, I think everyone agrees healthcare in the US is broken and it’s time something is done about it.




  • wjs018@beehaw.orgtoScience@beehaw.orgmRNA Vaccine Science
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    1 year ago

    It hopefully should. One of the main reasons biologics are so expensive isn’t just corporate greed (though it is that too), but because the manufacturing process is very intense. Running bioreactors at commercial scale to make your product, using a train of chromatography steps to purify it, and then filtering it to be concentrated and sterile before fill/finish in a pre-filled syringe or vial followed sometimes by lyophilization is an insanely complicated process that is very costly. mRNA processes simplify this a lot in that the mRNA don’t need to be manufactured using bioreactors that are filled with dirty cellular flotsam and jetsam that need removed. So, the production and purification parts are much much simpler. It still isn’t likely to be cheap, as GMP manufacturing is still complex and the fill/finish part of the operations are largely unchanged, but hopefully cheaper.



  • wjs018@beehaw.orgtoScience@beehaw.orgmRNA Vaccine Science
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    1 year ago

    I work in this field and this is a great summary of mRNA and its therapeutic usage. The article does mention it, but mRNA is going to be widely used beyond vaccines as well.

    As an example, at a previous company I worked at that had a robust pipeline and a portfolio of antibodies on the market, they were actively developing an mRNA-LNP version of all of their mAb programs. The idea is that if you develop an LNP platform that can reproducibly transfect say, the liver, then you can just turn the liver into a protein factory for anything you provide the mRNA sequence for. Having mAbs produced and excreted in the body solves one of the big challenges to convenient biologics dosing, bioavailability. Basically, a lot of antibodies, when injected under the skin, have trouble making it from the injection site to your bloodstream. This can be solved by administering via IV, but that has many downsides when it comes to patient convenience.

    The reason vaccines are the first successful application of this technology is because they only require very small doses to be effective. Compare the amount of protein that is in a flu shot (60 micrograms in Fluzone at most) to a typical mAb (~150 mg up to 1 g at most), you can see how much less the vaccine requires. I fully expect that as the upstream and downstream processes for LNP manufacture improve and are able to scale, that we will see mRNA take over what is currently the realm of biologics.