Thanks for your messages of support for Leyla, both here, phone and email. She's good at the moment - and if she is, we are too! Leyla is back at her morning school today.
Ok - here's some news. Something I suspected and wrote about several times is now being openly, freely discussed by the Doctors. Namely, Leyla's Mitochondrial disorder is now considered
unlikely to be Primary. Long awaited DNA assay results showed no mutations in areas known to cause primary Mitochondrial dysfunction. This was a manual assay.
I think it was this evidence that now leads the Docs to openly say "we think Mito is most likely secondary"
Whilst the DNA results
don't in themselves eliminate primary Mito for certain (this could be a new - thus far unknown mutation), data gathered so far, and when carefully considered together as a whole to include symptoms and her general clinical picture, does indeed point away from Mito as a primary condition, to be secondary to 'something else'.
I suspected this for some time, previous posts on this blog talk of this - but it's important that our Metabolic consultant who is an expert in this field, freely say this.
That Leyla has a Mitochondrial disorder (Cytochrome C Oxidase (COX) deficiency, of that there's no doubt. She has Mito dysfunction - but it's not genetically confirmed, and now unlikely to ever be. Therefore it is now prudent to consider the increasing likelyhood that something else, a different condition, is causing the suppression of Cytochrome C Oxidase.
It's perfectly reasonable to think this. There are one or two known conditions that can 'masquarade' as a primary Mitochondrial disorder, and probably lots more that are unknown, or ever will be.
Of the the known conditions that I'm aware of, one is Cerebral Creatine Deficiency. This is being looked into as we speak (GAMT and in particular X-Linked Creatine Deficiency in Females).
For completeness, here is the key data that we know so far
- Cytochrome C Oxidase (COX) deficiency was detected in thigh Muscle
- No COX deficiency was detected in skin fibroblasts
- Lactate and Pyruvate consistently low/normal in Blood and Cerebral Spinal Fluids (repeated tests)
- Manual DNA assay results (took 9 months) found no mutations in genes known to cause Mito
- SURF1 and POLG tests returned normal
Other tests
- MECP2 clear - however CDKL5 test was not performed - This has now been requested
- Cerebral Folate - Normal levels of 5-MTHF
- Cerebral B6 - Essentiall Normal
- Aromatic Amino Acid Decarboxylase - Normal Homovanilic Acid
Where does this leave me? Confused.
It may still be primary Mito - it could still be. It could possibly be CDKL5 (atypicall Rett as this was overlooked). Or it may be secondary to something else - something that we'll never find anyway - Or it may be secondary to something that we do find, but is non-treatable anyway - or it could be treatable....
Like I said. Confused.