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🔋Mitochondria Mechanic🔬

@mitorandy.bsky.social
511 followers 98 following 63 posts

𝙈𝙞𝙩𝙤𝙘𝙝𝙤𝙣𝙙𝙧𝙞𝙖 in health, cardiovascular disease, & aging. PhD in mitochondrial physiology. Posts are my own opinions.

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Reposted by 🔋Mitochondria Mechanic🔬
🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 02/02/2024
Some more fun #mitochondria science for Friday, from Bioenergetics 4th edition by Nicholls & Ferguson. Mitochondrial charge, respiration, and oxidant production relationships: 🧪
Figure from the textbook Bioenergetics 4th edition by Nicholls & Ferguson
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Reposted by 🔋Mitochondria Mechanic🔬
🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 08/02/2024
Excellent review on mitochondria and inflammation exploring how endosymbiosis may explain some things. 🧪 www.nature.com/articles/s41...
nature.com
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 07/03/2024
A mitochondrial origin for inherited diabetes mellitus 🧪 www.nature.com/articles/s41...
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 08/02/2024
Excellent review on mitochondria and inflammation exploring how endosymbiosis may explain some things. 🧪 www.nature.com/articles/s41...
nature.com
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 02/02/2024
Some more fun #mitochondria science for Friday, from Bioenergetics 4th edition by Nicholls & Ferguson. Mitochondrial charge, respiration, and oxidant production relationships: 🧪
Figure from the textbook Bioenergetics 4th edition by Nicholls & Ferguson
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Reposted by 🔋Mitochondria Mechanic🔬
🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 02/01/2024
How do proteins get into mitochondria? Another graphic from Bioenergetics 4th edition by Nicholls & Ferguson: 🧪
Image of a textbook figure and legend describing protein import to mitochondria.
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 02/01/2024
How do proteins get into mitochondria? Another graphic from Bioenergetics 4th edition by Nicholls & Ferguson: 🧪
Image of a textbook figure and legend describing protein import to mitochondria.
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Reposted by 🔋Mitochondria Mechanic🔬
🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 28/12/2023
Studying mitochondria in isolation has revealed complex bioenergetic relationships that are useful for understanding physiology in general. More good stuff from Bioenergetics 4th edition by Nicholls & Ferguson 🧪
Image of a textbook figure outlining metabolic control analysis for isolated bioenergetic organelles.
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 29/12/2023
"We breathe at the molecular level when mitochondria in our cells consume oxygen to extract energy from nutrients." Great first sentence of an abstract from this paper: www.science.org/doi/10.1126/...
science.org
Multiple approaches of cellular metabolism define the bacterial ancestry of mitochondria
The aerobic ancestry of mitochondria is unveiled with multiple approaches.
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Gretchen McCulloch @gretchenmcculloch.com · 28/12/2023
Hey. The fragmentation of the social media landscape has been hard on indie #scicomm 🧪 projects So if you'd like to follow a podcast that's enthusiastic about #linguistics, could you check out @lingthusiasm.bsky.social? And if you think your followers might like to, could you give this a repost?
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 28/12/2023
Studying mitochondria in isolation has revealed complex bioenergetic relationships that are useful for understanding physiology in general. More good stuff from Bioenergetics 4th edition by Nicholls & Ferguson 🧪
Image of a textbook figure outlining metabolic control analysis for isolated bioenergetic organelles.
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Reposted by 🔋Mitochondria Mechanic🔬
Zig 🪩 @zig.computer · 27/12/2023
Mitochondria are the powerhouse of the cell
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 27/12/2023
Mitochondria move around in cells 🔋🏎️ Heres another nice diagram from Bioenergetics 4th edition by Nicholls & Ferguson: 🧪
Image of a figure from a Bioenergetics textbook showing how mitochondria move in cells.
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Reposted by 🔋Mitochondria Mechanic🔬
🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 20/12/2023
Mitochondria use an electro⚡chemical🧪 proton gradient. It's usually mostly electric potential, but different circumstances can increase the contribution of diffusion potential. A deep cut from Bioenergetics 4th edition by Nicholls & Ferguson 🔋
Photo of a textbook figure showing electrochemical gradient composition in bioenergetic membranes.
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Hadas Weiss @hadas.bsky.social · 16/12/2023
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 20/12/2023
Mitochondria use an electro⚡chemical🧪 proton gradient. It's usually mostly electric potential, but different circumstances can increase the contribution of diffusion potential. A deep cut from Bioenergetics 4th edition by Nicholls & Ferguson 🔋
Photo of a textbook figure showing electrochemical gradient composition in bioenergetic membranes.
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 13/12/2023
Mitochondria are little circuits in our cells. 🔌⚡💡🔋 Helpful analogy for interpreting many bioenergetics experiments. Another great figure from Bioenergetics 4th edition by Nicholls & Ferguson. 🧪
Image from a figure in the textbook Bioenergetics 4th edition by Nicholls & Ferguson. It shows how mitochondrial function is similar to an electric circuit.
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 08/12/2023
Lift some weights! 💪 It doesn't take too much to protect your heart 🫀 and health 🧪 New @American_Heart statement: professional.heart.org/en/science-n...
professional.heart.org
Resistance Exercise Training in Individuals With and Without Cardiovascular Disease: 2023 Update
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Bean Davidson @bean-b12.bsky.social · 04/12/2023
"systemic immune and inflammatory responses may lead to more severe illness in some patients" SARS-CoV-2 can damage mitochondrion in heart, other organs, study finds. Would B12 help? B12 would help. #helpmechangethefuture CDC case# 1232781-B4W6H4 www.cidrap.umn.edu/covid-19/sar...
cidrap.umn.edu
SARS-CoV-2 can damage mitochondrion in heart, other organs, study finds
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 06/12/2023
What is human aging? We still don't really know, but our organs might predict healthy versus unhealthy aging. 🧪 www.nature.com/articles/s41...
nature.com
Organ aging signatures in the plasma proteome track health and disease - Nature
Blood plasma protein data was combined with machine learning models for a simple method to determine differences in organ-specific aging; the study provides a basis for the prediction of diseases and ...
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 05/12/2023
Mitochondria, inflammation, and cardiovascular disease each influence one another. Interesting read: 🧪 journals.physiology.org/doi/abs/10.1...
journals.physiology.org
Cardiovascular Aging: Spotlight on Mitochondria | American Journal of Physiology-Heart and Circulato...
Mitochondria are cellular organelles critical for ATP production and are particularly relevant to cardiovascular diseases including heart failure, atherosclerosis, ischemia reperfusion injury, and car...
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 30/11/2023
Replacing damaged mitochondria with new ones could be important for many human diseases; high-quality causal studies are needed to start translating this growing evidence. 🧪 www.nature.com/articles/s42...
nature.com
Mitophagy in human health, ageing and disease - Nature Metabolism
This Review discusses the role of mitophagy in cellular and organismal health and disease, with a specific focus on human ageing and evidence obtained in clinical studies.
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 26/11/2023
Mitochondrial power and cardiac aging:🔋🫀🧪 Great review article on one of my favorite broad topics: www.ncbi.nlm.nih.gov/pmc/articles...
ncbi.nlm.nih.gov
Mitochondrial proton leak in cardiac aging
Age-associated diseases are becoming progressively more prevalent, reflecting the increased lifespan of the world’s population. However, the fundamental mechanisms of physiologic aging are poorly un...
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Reposted by 🔋Mitochondria Mechanic🔬
Dr. Felix Sühlmann-Faul @suehlmann-faul.bsky.social · 26/11/2023
"Politicians don't understand science" ... say the key science advisers during an inquiry that was set up to investigate how prepared the United Kingdom was for the COVID-19 pandemic. I say "duh!" 🧪 www.nature.com/articles/d41...
nature.com
‘Politicians don’t understand science’: advisers give evidence at UK COVID inquiry
Patrick Vallance, Chris Witty and others reflect on advising the UK government during the ongoing investigation into the country’s pandemic response. Patrick Vallance, Chris Witty and others reflect...
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 26/11/2023
Mitochondrial power and cardiac aging:🔋🫀🧪 Great review article on one of my favorite broad topics: www.ncbi.nlm.nih.gov/pmc/articles...
ncbi.nlm.nih.gov
Mitochondrial proton leak in cardiac aging
Age-associated diseases are becoming progressively more prevalent, reflecting the increased lifespan of the world’s population. However, the fundamental mechanisms of physiologic aging are poorly un...
041
🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 22/11/2023
Can looking at muscle mitochondria predict how sick older people may be? Looks like yes. Mitochondrial decline is likely both a cause and a consequence of biological aging. 🧪 unreviewed preprint: www.medrxiv.org/content/10.1...
medrxiv.org
Muscle mitochondrial bioenergetic capacities is associated with multimorbidity burden in older adult...
medRxiv - The Preprint Server for Health Sciences
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Reposted by 🔋Mitochondria Mechanic🔬
Charles Brenner, PhD @charlesmbrenner.bsky.social · 19/11/2023
i’m a metabolism scientist at city of hope who can’t stop thinking about NAD coenzymes have some exciting results on a rare disease as well what interests you?
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 10/11/2023
Great reminder that ATP levels are maintained constantly; the cell and mitochondria are always working to keep ATP disequilibrium to power everything. Don't forget about the phosphocreatine system. 🧪 www.nature.com/articles/s42...
nature.com
Skeletal muscle energy metabolism during exercise - Nature Metabolism
Hargreaves and Spriet review regulatory mechanisms of ATP resynthesis during exercise and summarize nutritional interventions that target muscle metabolism to enhance athletic performance.
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 10/11/2023
Great reminder that ATP levels are maintained constantly; the cell and mitochondria are always working to keep ATP disequilibrium to power everything. Don't forget about the phosphocreatine system. 🧪 www.nature.com/articles/s42...
nature.com
Skeletal muscle energy metabolism during exercise - Nature Metabolism
Hargreaves and Spriet review regulatory mechanisms of ATP resynthesis during exercise and summarize nutritional interventions that target muscle metabolism to enhance athletic performance.
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 01/11/2023
Would adding "in mice" to the titles of high-profile research articles help prevent the media frenzies that often fuel public distrust of science? 🧪
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 31/10/2023
Interesting thoughts on mitochondrial charge 🔋 and aging (featuring some analysis of my own work) 🧪 www.mdpi.com/1422-0067/24...
mdpi.com
The Reduction in the Mitochondrial Membrane Potential in Aging: The Role of the Mitochondrial Permea...
It is widely reported that the mitochondrial membrane potential, ∆Ψm, is reduced in aging animals. It was recently suggested that the lower ∆Ψm in aged animals modulates mitochondrial bioenerget...
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 30/10/2023
SGLT2 inhibitors may improve heart function by rewiring metabolism through mitochondria using ketones 🧪 academic.oup.com/cardiovascre...
academic.oup.com
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Bethany Brookshire @beebrookshire.bsky.social · 30/10/2023
If there's one thing I've learned being Very Online it is this: Just because an person had an opinion you agreed with once, or made something you liked, doesn't mean they are A. At all smarter than you B. Qualified to speak on literally anything else C. Worthy of any power or influence
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 30/10/2023
SGLT2 inhibitors may improve heart function by rewiring metabolism through mitochondria using ketones 🧪 academic.oup.com/cardiovascre...
academic.oup.com
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 20/10/2023
It's often forgotten that Dr. Jennifer Moyle was a brilliant experimentalist and science partner of Dr. Peter Mitchell—they set out to prove how mitochondria make ATP using proton gradients. 🧪 Shamefully, Mitchell was the only one to get the Nobel Prize 🧵👇(1/4)
Photo from a book of Dr. Peter Mitchell & Dr. Jennifer Moyle.
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Carolin Ulbricht @carulin.bsky.social · 29/10/2023
T cell exhaustion through metabolic reprogrammed HIF1alpha stabilization 👉🏻 cool read 🧪 #immunosky www.nature.com/articles/s41...
nature.com
Mitochondrial dysfunction promotes the transition of precursor to terminally exhausted T cells throu...
Exhaustion is the functional deterioration of T cells following chronic stimulation. Here, Wu et al. show that mitochondrial dysfunction drives T cell exhaustion by inhibiting HIF-1α degradation and ...
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 29/10/2023
Surprising result, I'm interested to see where this goes: "Lactate activates the mitochondrial electron transport chain independently of its metabolism" 🧪 www.cell.com/molecular-ce...
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 25/10/2023
Nuanced thinking is always required, especially for **antioxidants** and diet. 🧪 www.sciencedirect.com/science/arti...
sciencedirect.com
Free radicals and antioxidants: appealing to magic
In biology, there are no good or evil molecules. There is limited or no evidence to support the consumption of antioxidants or (super)foods rich in an…
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 25/10/2023
Nuanced thinking is always required, especially for **antioxidants** and diet. 🧪 www.sciencedirect.com/science/arti...
sciencedirect.com
Free radicals and antioxidants: appealing to magic
In biology, there are no good or evil molecules. There is limited or no evidence to support the consumption of antioxidants or (super)foods rich in an…
021
Reposted by 🔋Mitochondria Mechanic🔬
Needhi Bhalla 💅🏽 @needhibhalla.bsky.social · 24/10/2023
"A hallmark of a good scientist is how they respond to criticism — are they prepared to question their own ideas and findings, or do they become defensive and attack their critics?...being self-critical and taking the criticism of others on board are surely important"
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Aaron Clauset @aaronclauset.bsky.social · 24/10/2023
This 2019 Science Advances paper lives rent-free in my head, and I think it's the social science paper that I mention the most in everyday conversation with my peers or elders... #youths #olds #science www.science.org/doi/10.1126/...
paper abstract "Kids these days: Why the youth of today seem lacking" by Protzko and Schooler. it's a zinger!
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 24/10/2023
Dinosaur mitochondria?? Dinosaurs likely had metabolism more similar to birds than to reptiles, which makes sense: 🧪 www.nature.com/articles/s41...
nature.com
Fossil biomolecules reveal an avian metabolism in the ancestral dinosaur - Nature
Molecular analyses of modern and fossil skeletal samples reveal that elevated metabolic rates consistent with endothermy evolved independently in mammals and plesiosaurs, and ornithodirans: ...
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 20/10/2023
It's often forgotten that Dr. Jennifer Moyle was a brilliant experimentalist and science partner of Dr. Peter Mitchell—they set out to prove how mitochondria make ATP using proton gradients. 🧪 Shamefully, Mitchell was the only one to get the Nobel Prize 🧵👇(1/4)
Photo from a book of Dr. Peter Mitchell & Dr. Jennifer Moyle.
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Reposted by 🔋Mitochondria Mechanic🔬
🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 19/10/2023
Why are cells powered by proton gradients? 🔋🧪 Excellent article by Nick Lane www.nature.com/scitable/top...
nature.com
Proton Gradient, Cell Origin, ATP Synthase
The discovery that ATP synthesis is powered by proton gradients was one of the most counterintuitive in biology. The mechanisms by which proton gradients are formed and coupled to ATP synthesis are kn...
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Reposted by 🔋Mitochondria Mechanic🔬
🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 18/10/2023
Mitochondrial battery analogy from the earliest days in bioenergetics! 🔋🧪 Fun drawing from Peter Mitchell's biography, Wandering in the Gardens of the Mind by Prebble & Weber.
A page from a book with a cartoon outlining several ideas about mitochondrial energy transduction.
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 19/10/2023
Why are cells powered by proton gradients? 🔋🧪 Excellent article by Nick Lane www.nature.com/scitable/top...
nature.com
Proton Gradient, Cell Origin, ATP Synthase
The discovery that ATP synthesis is powered by proton gradients was one of the most counterintuitive in biology. The mechanisms by which proton gradients are formed and coupled to ATP synthesis are kn...
021
🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 18/10/2023
Mitochondrial battery analogy from the earliest days in bioenergetics! 🔋🧪 Fun drawing from Peter Mitchell's biography, Wandering in the Gardens of the Mind by Prebble & Weber.
A page from a book with a cartoon outlining several ideas about mitochondrial energy transduction.
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 15/10/2023
Mitochondria both make and deal with oxidants ⚡ You may have heard about reactive oxygen species (ROS), free radicals, and antioxidants—mitochondria help make sure they're all balanced in cells. More good stuff from Bioenergetics by Nicholls & Ferguson 🧪
A page from the textbook Bioenergetics 4th edition by Nicholls & Ferguson explaining mitochondrial reactive oxygen species production and detoxification
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🔋Mitochondria Mechanic🔬 @mitorandy.bsky.social · 10/10/2023
Mitochondrial functions can be modeled as a circuit. I love the battery analogy, 🔋 but this is more accurate. Another gem from Bioenergetics 4th edition by Nicholls & Ferguson. Description in replies 👇 🧪
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