It's my understanding that a cancerous cell has the telomerase function turned on permanently, while healthy somatic cells do not. However the mechanism that activates telomerase is the same and therefore telomerase inhibitors would affect healthy cells as well.
Can you find a study that says otherwise, or is this just your opinion?
A
>> It's my understanding that a cancerous cell has the telomerase function turned on permanently, while
healthy somatic cells do not.This is correct.
>>
However the mechanism that activates telomerase is the same and therefore telomerase inhibitors would affect healthy cells as well. This is NOT correct. The 2 mechanisms are very different.
The mechanism that activates telomerase in healthy somatic cells is well-defined and well-understood. There's a repressor protein bound to a regulator element controlling the expression of hTERT. You introduce a small molecule that attaches to the repressor protein and this dislodges it from its DNA binding site. The hTERT gene then starts expressing the protein component of telomerase which combines with plenty of available RNA component to form the telomerase enzyme.
The botanicals in product B that you keep claiming are "inhibitors" (curcumin, green tea, boswellia, resveratrol) only cause a problem in somatic cells if they somehow prevent the small molecule in question from coaxing the repressor protein off its binding site. A good screen finds the small molecules that coax the repressor protein off the DNA, and simulatneously weeds out the molecules that encourage it to hang on tighter. Since the whole process is so well-defined and well-understood, this is pretty easy to do. I trust that Bill Andrews has done it well.
In contrast, the mechanisms that activate telomerase in cancer cells are poorly-defined and poorly-understood. There's no one mechanism. Cancer cells have figured out a plethora of diiferent ways to do it, and no one is close to understanding how many ways there really are -- let alone how each individual mechanism works. For example, some cancer cells seem to replicate the telomerase gene over and over again, making many different copies. Others rely on a virus to insert itself upstream of the promoter. The list goes on and on. It varies greatly from one cancer cell line to another.
Suppose you expose some cancer cell line to some random molecule (say curcumin, green tea, boswellia, etc), and then discover via a TRAP assay that telomerase expression has been reduced. What can you then conclude about healthy somatic cells? Very little. There's a whole series of intermediate mechanisms that occur in the cancer cell in between exposure to the compound and the reduction of telomerase, which the experiment tells you nothing about -- and which, as I said, are very poorly understood to begin with. All of this has very little to do with whether or not this particular molecule (curcumin, green tea, boswellia, resveratrol, etc) will make it harder to coax the repressor protein off its binding site in a healthy somatic cell.