I think this disease is 100% a brain problem. It ties in with PEM because it’s impossible to exert your body in any way without using your brain. Maybe a few of your organs can function without brain input, but everything else you do requires activating sensory, autonomic, vestibular, neuromuscular, and cognitive nerve pathways.
The primary pathology of the disease is activated by increasing the metabolic activity of these nerve pathways (exertion), the response to which is inflammation local to the actived nerves in the brain. It’s delayed because it takes time for the affected tissue to start the inflammatory cascade, which includes recruitment of inflammatory cells which take time to reach the tissue and peak the response.
The mitochondria don’t tie in. The fatigue of this disease is central, and the muscle weakness is neuromuscular, not due to an energy problem in the muscle itself.
Whatever, your theory (bottom up/top down - Phair) you have to be able to explain the plasma switching reversal in cellular energy/mitochondria morphology (Prusty - the mitochondria change shape/it's reversible) and yes central nervous system problems (brain). Exosomes, seem to me to provide the "signalling" to explain this cascade - fatigue --. Fluge and Mella suggested a signalling problem in 2006:
"ME/CFS is caused by immune interference with an unidentified target, potentially a signaling factor, which ultimately causes metabolic dysfunction and in" [https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5161229/ ].
I posted this in another place [
https://www.s4me.info/threads/blog-...lood-by-simon-mcgrath.9168/page-2#post-162329 ].
"I came across this after posting/before reading your replies and yes it refers to something new to me (at least) i.e. prions. From:
https://www.frontiersin.org/articles/10.3389/fnins.2017.00026/full
"Multiple Sclerosis and Inflammation
Inflammation is a central player in most neurodegenerative diseases. Neuroinflammatory processes exert profound changes not only in the vicinity but beyond the local environment of cells. In addition to the propagation of toxic proteins, exosomes also carry important inflammatory modulators, such as mRNAs, miRNAs, and cytokines (Gupta and Pulliam, 2014). Microglia, the resident macrophages of the CNS, can shed exosomes loaded with pro-inflammatory molecules such as IL-1β (Bianco et al., 2005) and other cytokines. Their scavenging functions are also crucial in the clearance of toxic seeds such as Aβ (Yuyama et al., 2012). Furthermore, endocrine signals from hematopoietic cells directed to the
brain can be transported by exosomes, a phenomenon that is augmented in a context of inflammation (Ridder et al., 2014). It is interesting to note that extracellular vesicles can readily cross the blood brain barrier, adding a communication channel by which systemic inflammation can modulate physiological processes in the CNS."
Second extract:
"As many other proteins are present in exosomes, recent initiatives have used large-scale methodologies to analyze exosome content. Using mass-spectrometry to analyze circulating microvesicles, it was identified that PD patient fibroblasts are enriched in syntenin 1, a regulator of exosome biogenesis (Tomlinson et al., 2015). Similarly, a set of nine
miRNAs have been shown to be distinct in
exosomes purified from control and
prion-infected cells (Bellingham et al., 2012a), defining a molecular “signature” that can identify a pathological process. Although the relevance of such hits in the disease is not established yet, these approaches suggest that establishing a “bar-code” from the exosomal profile of patients might be a more valuable diagnostic tool than quantifying specific disease-related proteins, which are often mixed at early disease stages." "
ME Action are lobbying for the delivery of a diagnostic test
https://www.meaction.net/2019/02/26/announcing-millionsmissing-2019-join-us/
@JaimeS