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Alyssa Johnson

@alyssajohnson.bsky.social
1.2K followers 961 following 25 posts

Associate Professor at LSU using worms and flies to study lysosomes, aging, and age-related diseases. Lab website: faculty.lsu.edu/johnsona/index.php

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Alyssa Johnson @alyssajohnson.bsky.social · 16/05/2026
Congrats to the newest LSU alumni! @lsuscience.bsky.social
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lsuresearch.bsky.social @lsuresearch.bsky.social · 12/03/2026
"When chance brought a lone crustacean to [an LSU] scientist’s car park in the USA, he had an unusual response: try to get an exceptionally detailed 3D scan of the animal." - BBC Wildlife Magazine discoverwildlife.com/animal-facts... @lsu.bsky.social
discoverwildlife.com
"I believe it may have fallen from someone’s grocery bag.” Scientist finds unlikely creature in US parking lot – and only has one thing on his mind... | Discover Wildlife
The microscopy expert put the big-clawed animal through his micro-CT scanner, creating an incredibly detailed image of its body.
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lsuresearch.bsky.social @lsuresearch.bsky.social · 09/03/2026
Enjoy this animation of sleep neurons in a fruit fly... and while you are at it, did you know fruit flies are teaching us how some people can get by with 4-5 hours of sleep every night just fine?! It has to do with a genetic variant that boosts mitochondrial function! www.lsu.edu/blog/2026/03...
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Alyssa Johnson @alyssajohnson.bsky.social · 12/02/2026
PhD #3 from the Johnson lab! Congrats @cristianric.bsky.social !
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Alyssa Johnson @alyssajohnson.bsky.social · 11/11/2025
Excellent work by first author graduate student Cristian Ricaurte-Perez who is currently supported by an American Heart Association predoctoral fellowship and will be applying for postdocs soon! @cristianric.bsky.social @lsuscience.bsky.social
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Alyssa Johnson @alyssajohnson.bsky.social · 11/11/2025
Transcriptomic analyses revealed that DAF-16 and HLH-30 cooperate to induce expression of lipid metabolism genes, including vps-34 and bec-1, that support lysosome membrane remodeling.
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Alyssa Johnson @alyssajohnson.bsky.social · 11/11/2025
Remarkably, experimental stimulation of lysosome tubules by over-expression of a small lysosomal gene (SVIP) promotes nuclear localization of HLH-30 in a cell autonomous and cell non-autonomous fashion, which we hypothesize contributes to systemic benefits that support healthy aging.
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Alyssa Johnson @alyssajohnson.bsky.social · 11/11/2025
Graduate student Cristian Ricaurte-Perez, followed up on this work to uncover new regulators of lysosome tubulation. His initial work led to the discovery that DAF-16 and HLH-30, two transcription factors linked to aging regulation, are critical for efficient lysosome tubulation.
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Alyssa Johnson @alyssajohnson.bsky.social · 11/11/2025
In previous work published in @nataging.nature.com, we showed that lysosomes transform into tubular networks upon food limitation; this morphological transformation of lysosomes promotes faster autophagic cargo turnover and is required for the beneficial effects of dietary restriction.
nature.com
Tubular lysosome induction couples animal starvation to healthy aging - Nature Aging
The authors report that a change to lysosome morphology, from vesicular to tubular form, supports lifespan extension upon dietary restriction and promotes heightened autophagy and healthy aging when s...
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Alyssa Johnson @alyssajohnson.bsky.social · 11/11/2025
In our newest paper published in @natcomms.nature.com, we show that DAF-16/FOXO and HLH-30/TFRB promote healthy aging, in part, by activating lipid metabolism genes that remodel lysosomes into tubular networks (more in comments below). www.nature.com/articles/s41...
nature.com
DAF-16/FOXO and HLH-30/TFEB comprise a cooperative regulatory axis controlling tubular lysosome induction in C. elegans - Nature Communications
This study reveals that transcription factors DAF-16/FOXO and HLH-30/TFEB promote healthy aging in C. elegans, in part, by activating lipid metabolism genes that remodel lysosomes into tubular network...
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Alyssa Johnson @alyssajohnson.bsky.social · 27/09/2025
In our newest paper, we show that expression of a familial natural short sleep mutation in flies extends lifespan through enhanced mitochondrial physiology. First first-author paper for former graduate student Pritika Pandey! @pritika26.bsky.social @lsuscience.bsky.social @lsu.bsky.social
cell.com
A familial natural short sleep mutation in dec2 extends healthspan and lifespan in Drosophila
Biological sciences; Genetics; Neuroscience
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Alyssa Johnson @alyssajohnson.bsky.social · 17/05/2025
Congratulations to Dr. Pritika Pandey! 2nd PhD student from the lab and now she is off to do a postdoc at UNC! 🎉 🎓 @lsuscience.bsky.social
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Alyssa Johnson @alyssajohnson.bsky.social · 15/03/2025
My student’s R36 (which got a great score) doesn’t have a summary statement even though it was reviewed more than 30 days ago. Assuming her SRO and PO are also not on that list but can’t search it anymore. Hasn’t been reassigned either. She has no one to contact, so it’s just in limbo.
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Alyssa Johnson @alyssajohnson.bsky.social · 13/03/2025
My PO for my MIRA is also not listed even though she is still listed on my eraCommons.
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Alyssa Johnson @alyssajohnson.bsky.social · 02/03/2025
Is there any information on whether no-cost extensions will even be considered? This could be critical for many labs to keep operations going while we wait for decisions on new awards.
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Alyssa Johnson @alyssajohnson.bsky.social · 27/02/2025
Have 2 applications assigned to CMAD 👎🏼. Hope they get to re-schedulling these soon. Thanks for your updates!
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Cahir O'Kane @cahirokane.bsky.social · 24/02/2025
This is a useful distinction - generative vs non-generative AI for writing, and how it relates to the writer's own input
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Alyssa Johnson @alyssajohnson.bsky.social · 25/02/2025
I completely agree. I would rather my students struggle and make mistakes. It’s part of the learning process. I worry that creative thought will decline with so much generative AI.
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Alyssa Johnson @alyssajohnson.bsky.social · 22/02/2025
Great video explaining indirect costs from the AAU. I shared this with my lab members.
youtube.com
Facilities and Administrative (F&A) Costs Explainer
YouTube video by Association of American Universities
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Alyssa Johnson @alyssajohnson.bsky.social · 21/02/2025
Thanks for the play by play!
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Alyssa Johnson @alyssajohnson.bsky.social · 19/02/2025
frontiersin.org
Frontiers for Young Minds Nobel Collection: Three new Nobel Prize-winning breakthroughs shared by Laureates with young readers
Frontiers for Young Minds, an award-winning science engagement journal for kids, is proud to share three new articles written by Nobel Prize-winners. These thre
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Cahir O'Kane @cahirokane.bsky.social · 16/02/2025
ER - a "neuron within a neuron". Fascinating work on signal spread via the ER in dendrites. Still leaves open the role of ER continuity in axons.
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Alyssa Johnson @alyssajohnson.bsky.social · 10/02/2025
I think this is what you were looking for.. even a link to a google sheet with raw data for all states.
forbes.com
What The NIH Cut To Indirect Cost Payments Could Cost Red States
The Trump administration’s decision to cap how much NIH will pay for indirect costs on university research grants would cost 10 red states more than $1 billion.
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Alyssa Johnson @alyssajohnson.bsky.social · 08/02/2025
Our negotiated rate at LSU is 50% (non-medical school in a red state). I think that’s probably standard in most red states too, so 15% is a drastic cut across the board.
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Alyssa Johnson @alyssajohnson.bsky.social · 01/02/2025
Some good news amidst all the chaos…New paper published in Biology Open! This work was initiated by two undergraduates (Brennan Mercola and Tatiana Villalobos) and completed by graduate students Jocelyn Wood and Ankita Basu! @biologyopen.bsky.social @lsuscience.bsky.social @lsuresearch.bsky.social
journals.biologists.com
Increased expression of the small lysosomal gene SVIP in the Drosophila gut suppresses pathophysiological features associated with a high-fat diet
Summary: Increasing lysosome activity in the fly midgut offsets negative effects of an obesogenic high-fat diet.
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David W. Sanders! @davidwsanders.bsky.social · 31/01/2025
Light-activated binding of a protein to tubular lysosomes:
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Prosanta Chakrabarty @prosanta.bsky.social · 29/01/2025
Are you a graduating undergrad looking for research experience? Come to @lsu.bsky.social and join @lsulagniappe.bsky.social Louisiana Graduate Network in Applied Evolution ("LAGNiAppE": a 1-yr research training program for recent college graduates) Deadline 3/16/25 www.lsu.edu/science/bios...
lsu.edu
LSU LAGNiAppE!
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Seungsoo Kim @seungsookim.bsky.social · 20/01/2025
Hello Bluesky friends! I am a #newPI starting at UC Irvine in April, interested in gene regulation and functional genomics in stem cell models of development (esp neural crest). We are hiring at all levels – please reach out/spread the word! sskimlab.org
sskimlab.org
Kim Lab at UC Irvine
Visit the post for more.
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Science Magazine @science.org · 03/01/2025
A new study finds ants best humans at tests of collective intelligence. Learn more: scim.ag/4h2K0ID
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Jalees Rehman @jalees.bsky.social · 08/12/2024
Misregulation of mitochondrial 6mA promotes the propagation of mutant mtDNA and causes aging in C. elegans www.cell.com/cell-metabol...
cell.com
Misregulation of mitochondrial 6mA promotes the propagation of mutant mtDNA and causes aging in C. elegans
Hahn et al. report the presence of 6mA, a DNA modification, on the mitochondrial (mt)DNA of various animal and plant species. Modulating the activity of 6mA enzymatic modifiers implicates 6mA in regulating mtDNA replication and expression and the transmission of mtDNA mutations across generations, ultimately affecting mitochondrial health and organismal lifespan.
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Women in Autophagy @womeninautophagy.bsky.social · 05/12/2024
#PaperAlert we bring wonderful news about @WAutophagy ... our Mericka McCabe and our founders just published a @NatureCellBio article explaining the wonders of our Network...don't miss a bit!! With very valuables testimonials of our volunteers... rdcu.be/d10N6
rdcu.be
Women in Autophagy: an initiative to promote gender parity in science
Nature Cell Biology - Scientific questions are universal but the scientific workforce remains skewed, with women and gender minorities still underrepresented. Initiatives such as the Women in...
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Coleen Murphy @ctmurphy1.bsky.social · 05/12/2024
My first Bluesky paper post! I’m pleased to announce the publication of our single-nucleus atlas of adult neurons from wild-type and long-lived, better performing insulin receptor (daf-2) mutants, by Jon St. Ange and Yifei Weng et al.DOI: 10.1016/j.xgen.2024.100720
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Christian Frezza @frezzalab.bsky.social · 29/11/2024
A panoramic view of cell population dynamics in mammalian aging 🧪 www.science.org/doi/10.1126/...
science.org
A panoramic view of cell population dynamics in mammalian aging
To elucidate aging-associated cellular population dynamics, we present PanSci, a single-cell transcriptome atlas profiling over 20 million cells from 623 mouse tissues across different life stages, se...
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The Company of Biologists @biologists.bsky.social · 25/11/2024
We are happy to report that our journals and community sites now have Bluesky accounts. Follow them at: @dev-journal.bsky.social @jcellsci.bsky.social @jexpbiol.bsky.social @dmmjournal.bsky.social @biologyopen.bsky.social @the-node.bsky.social @prelights.bsky.social @focalplane.bsky.social
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Nikolay Kukushkin @niko-kukushkin.bsky.social · 23/11/2024
Hi! I study how cells form memories. Our lab's most recent study in Nature Commmunications shows that non-neural cells, including kidney cells, can count, detect precise time patterns, and form lasting memories in ways similar to neurons.🧵https://www.nature.com/articles/s41467-024-53922-x
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Philip Hubbard @philiphubbard.bsky.social · 23/11/2024
FlyWire #Neuroscience data (green) is now in neuronbridge.janelia.org for matching against #Drosophila light #microscopy data (magenta). Thanks to Cristian Goina, Hideo Otsuna, Rob Svirskas, Konrad Rokicki. See a match in the browser, using mixed surface / volume rendering implemented with #threejs.
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William Mair @willmair.bsky.social · 22/11/2024
Cool new work from the lab by @chris-morrow.bsky.social: Often we think of auto-fluorescence as a hindrance to experiments - but endogenous metabolites have specific fluorescence we can use to determine the metabolic state of the cell - and predict lifespan.. www.nature.com/articles/s42...
nature.com
Endogenous mitochondrial NAD(P)H fluorescence can predict lifespan - Communications Biology
Endogenous mitochondrial NAD(P)H fluorescence enables label-free and subcellular resolution quantification of aging, prediction of remaining lifespan and tracking of age-dependent changes to mitochond...
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Jalees Rehman @jalees.bsky.social · 23/11/2024
mTORC1 activity licenses its own release from the lysosomal surface www.cell.com/molecular-ce...
cell.com
mTORC1 activity licenses its own release from the lysosomal surface
The activation of mTORC1 is intricately linked to its subcellular localization, with the Rag GTPases controlling its lysosomal recruitment in response to nutrient cues. Acharya and Demetriades uncover...
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Johannes Pilic @johannes-pilic.bsky.social · 23/11/2024
Finally moved to #Bluesky and happy to share our recent work! We found that hexokinase 1 rapidly forms rings around #mitochondria during energy stress to regulate mitochondrial fission: www.cell.com/molecular-ce... For a quick summary of our findings, check out the comment section.
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Wallace Marshall @wallaceucsf.bsky.social · 21/11/2024
How do organelles fit together inside a crowded cell? Answering this question requires a way to image many organelles in a whole cell at high resolution with high throughput. Our new preprint shows how to do this in yeast using soft x-ray tomography www.biorxiv.org/content/10.1...
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Laura Phillips @lauraphillips.bsky.social · 27/09/2024
A 25-year-old woman with type 1 #diabetes started #producing her own #insulin <3 months after receiving a #transplant of reprogrammed #stem #cells. She is first person with the disease to be treated using cells that were extracted from her own body. #breakthrough? www.nature.com/articles/d41...
nature.com
Stem cells reverse woman’s diabetes — a world first
She is the first person with type 1 diabetes to receive this kind of transplant.
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Esther Verheyen 🇨🇦 @estherverheyen.bsky.social · 15/11/2024
My starter pack is growing! Please reach out if you use animal models (flies, worms, mice, fish, etc) to study disease mechanisms and want to be added. go.bsky.app/MhUwjSx
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Alyssa Johnson @alyssajohnson.bsky.social · 21/11/2024
I deactivated mine last week. I think there’s enough critical mass on Bluesky now.
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William Mair @willmair.bsky.social · 19/11/2024
Learn about the latest biology of aging research in a beautiful setting! Mark your calendars for the 5th Interventions in Aging Conference, Oct 5-7 2025, Malta. Some great speakers and more coming soon! www.fusion-conferences.com/conference/181 #FusionAging25
fusion-conferences.com
Fusion Home
Our scientific research conferences support the development of physical, medical and life sciences, providing a powerful platform that encourages discussion and collaboration in luxury locations acros...
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Alyssa Johnson @alyssajohnson.bsky.social · 16/11/2024
Can I be added to this group? We study aging and autophagy in worms and flies.
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Thiago Carvalho @cyrilpedia.bsky.social · 16/11/2024
'Cells exhibiting a physiological resting state (...) were positively correlated with lifespan, while immune cells displaying evidence of activation or mature phenotypes (...) were generally associated with a shortened lifespan' www.nature.com/articles/s41...
nature.com
Dietary restriction impacts health and lifespan of genetically diverse mice - Nature
Health effects of dietary restriction are uncoupled from longevity.
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