📄 Extracted Text (913 words)
From: "jeffrey E." <jeevacationggmail.corn>
To:
Subject: Re: confidential please
Date: Tue, 19 Sep 2017 11:00:11 +0000
side effects?
On Mon, Sep 18. 2017 at 6:11 PM wrote:
here is the concept i am discussing w arch capital today and then w third rock and
voyager on thursday and friday. i will also go visit the scientists that harvest and inject
mitochondria at harvard (hearts only).
oxygen and energy are the two highest order system issues - nonspecific to just add
oxygen or energy but it works for everything. doesn't fix underlying problem but does
buy time, improve function and prevent greater damage from certain injuries if caught
quickly. i think it can change the game big time in the neuro space.
Mitochondrial transplantation in the human brain
Idea
Mitochondrial transplantation is based on the delivery of isolated, viable mitochondria to
the target organ to restore bioenergetic function.
I believe we can augment or replace mitochondria in the brain damaged by
ischemia/aging/disease as a mechanism to enhance cellular function and cellular
rescue.
Feasibility
• Human trials underway elsewhere. 2016 heart trials effective - cardiac,
skeletal muscle, pulmonary & hepatic tissue + neuronal
• Augments a natural process. Glial/neuronal bidirectional organelle transfer,
retrograde axonal recycling
• Known delivery mechanisms. Accessible directly or via arterial endovascular
• Known outcomes in other organs with similar bioenergetic demands.
Cardiac trial results show that 10 min following mitochondria] transplantation
myocardial function is significantly enhanced as compared to hearts receiving
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injection of respiration media (vehicle) alone and that this function remains
enhanced for at least 28 days - the end point of current studies.
Safety
• Seems to mimic and turbocharge a natural process. Direct injection and
vascular - rescues and restores function without immune, autoimmune activation
or arrhythmia, etc
• No systemic effects or side effects. In all studies of animal or humans, the
distribution of mitochondria following delivery by direct injection or by vascular
infusion remains within the end organ and is not detectable in other organs. This
finding is important as the delivery of mitochondria by vascular infusion provides
for localized therapy without cross-contamination to other end-organs.
• Easy harvest. All cells in the human body contain mitochondria, except
erythrocytes. Unless there is an underlying mitochondrial genetic disease, brain
mitochondria in degenerative disease and aging are uniquely affected in function
or reduced in amount.
Efficacy
• Compared to... Data indicates that autologous mitochondrial transplantation is
efficacious as a cardioprotective therapy whether these organelles are delivered by
directly injection or delivered by vascular infusion through the coronary arteries.
• Mitochondrial isolation. Mitochondrial transplantation is based on the delivery of
isolated, viable mitochondria to the target organ. The isolation of mitochondria can
be performed using a variety of techniques and methodologies currently takes 90-
120 minutes to complete.
• Lifespan. Isolated mitochondria can be stored on ice for approximately 1 h but
storage beyond this time point greatly reduces efficacy. Previous reports that have
shown that mitochondrial bioenergetic function is decreased to bw 10-15% of
normal after the mitochondria were frozen, even when preservatives are used.
• Organelle dynamics. Total mitochondria must be used for mitochondrial
transplantation. The bioenergetic function of this population includes that of sub-
sarcolemmal and intra-fibrillar mitochondria. Previous studies have shown that
mitochondrial sub-populations have differing but suboptimal effects. In most
studies the number of mitochondria used for direct injection is 1-3 x 107
mitochondria. The mitochondria are suspended in buffer and injected directly or
via the vascular tree.
• Lifespan of transplant. Fluorescence microscopy has demonstrated that
transplanted mitochondria delivered by direct injection are present and viable for
at least 28 days following injection into the myocardium in animals. In the human
heart: The transplanted mitochondria are widely distributed from the epicardium
to the subendocardium. The majority of injected mitochondria are found initially
within the interstitial spaces between cardiomyocytes.
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• Time to effect. In the human heart: within 1 hour post-directly injected delivery,
the transplanted mitochondria are detectable within cardiomyocytes residing near
the sarcolemma between Z lines of the sarcomeres and in clusters around
endogenous damaged mitochondria as well as near the nucleus. Vascular delivery
of mitochondria through the coronary arteries results in the rapid and widespread
distribution of exogenous mitochondria throughout the heart, within 10 min and
provides for cardioprotection. Also delivered mitochondria to the lung by vascular
infusion through the pulmonary artery. In these studies, the mitochondria were
labeled with 18F-rhodamine 6G. Positron emission tomography and computed
tomography showed that the mitochondria were localized in the lung and were not
detectable in any other areas of the body.
• Dose calculation. Enumeration of injected mitochondria has shown that 43% of
the injected mitochondria are attached to or found within cardiomyocytes.
• Mechanism. At present, no known mechanism for this "end-organ homing",
where the transplanted mitochondria are retained by the immediate down-stream
organ, but suggest that this observation may play an important therapeutic role in
future studies and applications using mitochondria' transplantation.
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