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Title : P53 loss questions
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P53 loss questions

Hi all,

I'm in the middle of determining what my next steps will be following my AA3 (previously thought to be an Oligo 2) diagnoses.

The tumour is listed as having P53 loss (or truncated mutation), which I know is more unusual in this type of tumour. While doing research on a ketogenic diet I repeatedly came across brief descriptions of p53 playing a role in metobolism...so I decided to look into it more. Below are a few links to different papers I've read. It's seems like you can exploit this loss in a number of different ways.

Firstly, there is evidence that it has some role in fatty acid oxidation and glutathione oxidation (I do not have a mutation to the MYC gene - which also plays a role in glutathione oxidation). According to these papers, these tumours (with p53 loss) are highly vulnerable to glucose restriction, they allow the PPP to become unchecked - which is a pathway that metabolises glucose. (I have read that p53 loss may prevent gene mutations (I think I was understanding that right), which maybe why I do not have an MYC mutation (the mutations I do have are listed in my post called Pathology Report from a few weeks ago).

It also regulates ROS homeostatsis, either through pro or anti-oxidant means (would loss of p53 mean that ROS was unchecked and how would this impact IDH1 mutant gliomas where ROS is already significantly altered, right?) In general, I'm questioning how IDH1 mutation works with loss of p53? IDH mutation metabolises glutamate at high rates, correct? So if p53 is lost (therefore the tumour would not generate GLS2 (at least through P53) and I do not have an MYC mutation (which allows the tumour to uptake large amounts of GLS1 - both GLS1 and 2 metabolise glutathione, then what others ways what the cells use glutathione?

I'm also questioning whether a ketogenic diet would be useful if I am able to use Proton therapy. I believe all radiation therapy uses ROS as one mechanism, proton therapy using more. A ketogenic diet has been said to limit ROS (sort of like antioxidants) but if it will limited it in standard therapy will more be better in Proton therapy? And then, the P53 in relationship to ROS question also comes in here.

I have read that keto may not be good for an IDH mutant tumour because of NAD+. Can someone elaborate more on that?

Just some more info - I had a gross total resection (surgeon said 99.9%). I'm considering Proton Therapy (do people have a hard time getting that covered by insurance), CBD/THC is try to block glutathione uptake during radiation, ketogenic diet to block glucose with attention to glutamate and methionine intake and DHC fatty acids, if needed boswellia and celebrex to prevent need for steroids, Stephen has recommended disulfiram, which I will look into and I'm going to look into metformin (seems to have a special interest with P53 loss), curcumin ( I was taking it before surgery) and I'm considering not taking any chemo at this time.

I apologize that I'm not as organized as I could be in asking these questions. I am experiencing aphasia following surgery.

Here are the links:

http://ift.tt/2qex5hV
http://ift.tt/2lDSX1O
http://ift.tt/2qcyfKX
http://ift.tt/2lGus3M
http://ift.tt/2qgPHhy

Thank you all.

Maria

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