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RE: [IPk] Humalog


Thanks for the information and comments.  It seemed difficult to 
believe that Humalog would be on the market if there were the 
slightest suspicion of its having any mitogenic potency.  I've been 
using it a long time now and am much happier with just the single 
insulin.  I have used Regular, NPH, and Lantus in the past.  This is 
one of the greatest advantages of the pump-just the one.

>I will send you off-list a PDF of a journal article that shows LOWER 
>mitogenic potency among rapid-acting insulin analogues vs. regular 
>'human' rDNA insulin (Actrapid, Humulin R). Mitogenic potency is the 
>fancy term for 'if you put this stuff in a Petri dish with cells, 
>what's the chance they'll grow fast?' Uncontrolled cell growth is, 
>of course, the origin of a tumour.
>I am confident using Humalog in my pump, knowing that the mitogenic 
>potency is much lower than that of Human R. However, there is NO 
>DIRECT EVIDENCE (want to be clear!!!) that ANY insulin currently 
>marketed causes tumours in humans. The very first insulin analogue 
>product developed by Novo Nordisk did cause tumours in animal 
>studies and it was thus very swiftly abandoned and has never been 
>sold. Its mitogenic potency was more than 10 times greater than 
>human R.
>The mitogenic potency of Lantus (insulin glargine) is nearly 8 times 
>greater than the mitogenic potency of human R, though, and this has 
>raised some eyebrows in the scientific community. We know that 
>Lantus doesn't cause tumours in animals over their few-year lifespan 
>(valuable information) but we don't know yet what happens in humans 
>over a 20-odd-year span. The benefits of Lantus in terms of clinical 
>data with regard to diabetes control outweighed the risks of "the 
>unknown" in the regulatory bodies' evaluations. If we want drugs 
>that may give us a better quality of life *now*, we can't hold them 
>in clinical trials for 25 years...life is full of risk/benefit 
>equations, isn't it?
>Type 1 13 years; MiniMed pumper 7.5 years; Animas pumper 2.5 years; 
>nary a molecule of intermediate- or long-acting insulin in 10 years!!

Tim C.
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