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Brian Kleiboeker

@bkleiboeker.bsky.social
470 followers 530 following 31 posts

3rd year MD/PhD student at the University of Pittsburgh studying oxidized lipids and cell metabolism. All views expressed are solely my own. scholar.google.com/citations?user=5…

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Brian Kleiboeker @bkleiboeker.bsky.social · 18/06/2026
Although plasmalogens are abundant in mammalian membranes, their functions are elusive. Genetic studies suggest that plasmalogens promote ferroptosis, but the directionality and existence of this relationship is controversial. Our latest paper addresses this controversy... (1/5)
nature.com
15-LOX-catalytic bias towards ether-(alkenyl)-ETE-PEs oxidation bestows selectivity of PRO-ferroptotic cell death signaling - Nature Communications
New functions and (patho)physiological role of broadly represented in membrane ether phospholipids as substrates of 15-lipoxygenases have been established in health and several acute/chronic diseases:...
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Reposted by Brian Kleiboeker
Christian Frezza @frezzalab.bsky.social · 16/03/2025
Direct sensing of dietary ω-6 linoleic acid through FABP5-mTORC1 signaling | Science www.science.org/doi/10.1126/...
science.org
Direct sensing of dietary ω-6 linoleic acid through FABP5-mTORC1 signaling
Diet influences macronutrient availability to cells, and although mechanisms of sensing dietary glucose and amino acids are well characterized, less is known about sensing lipids. We defined a nutrien...
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Brian Kleiboeker @bkleiboeker.bsky.social · 19/02/2025
It’s hard to focus lately and feels wrong to talk about science when the whole system is under threat, but I’ve been reading Hans Krebs’ autobiography and it’s excellent. I highly recommend for all scientists, especially biochemists
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Reposted by Brian Kleiboeker
James Olzmann @olzmannlab.bsky.social · 08/01/2025
Excited to share our new preprint! Exceptional work by @mikelangelipid.bsky.social identifies the first #LipidDroplet lipid quality control pathway! LD-localized FSP1 safeguards neutral lipids from peroxidation and prevents #ferroptosis. 🤩https://www.biorxiv.org/content/10.1101/2025.01.06.631537v1
biorxiv.org
FSP1-mediated lipid droplet quality control prevents neutral lipid peroxidation and ferroptosis
Lipid droplets (LDs) are organelles that store and supply lipids based on cellular needs. While mechanisms preventing oxidative damage to membrane phospholipids are established, the vulnerability of L...
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Brian Kleiboeker @bkleiboeker.bsky.social · 20/12/2024
CRISPR screening in epithelial cells suggests that peroxisome-derived ether lipids alter cellular viability in response to lipotoxic stress. Fas-associated factor family member 2 (FAF2) appears to be a key regulator of this process. This is an interesting preprint! www.biorxiv.org/content/bior...
biorxiv.org
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Brian Kleiboeker @bkleiboeker.bsky.social · 16/12/2024
To my reading, this paper suggests a role for 'classic' #ferroptosis mechanisms (namely LPCAT3 and oxPL) in ASCVD in humans www.jlr.org/article/S002...
jlr.org
Aspirin modulates generation of procoagulant phospholipids in cardiovascular disease, by regulating LPCAT3
Enzymatically oxygenated phospholipids (eoxPL) from lipoxygenases (LOX) or cyclooxygenase (COX) are pro-thrombotic. Their generation in arterial disease, and their modulation by cardiovascular therapies is unknown. Furthermore, the Lands cycle acyl-transferases that catalyze their formation are unidentified.
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Reposted by Brian Kleiboeker
Ute Hellmich @hellmichgroup.bsky.social · 16/11/2024
Ok, trying to bring my community back together... I created a starter pack for lipids and membrane protein aficionados! Feel free to share, add and distribute, so we can come together again! 😍 go.bsky.app/AEeXh86
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Reposted by Brian Kleiboeker
Antonio Martínez Ruiz @tonnomartinez.bsky.social · 19/11/2024
I have initiated this #StarterPack with #RedoxBio researchers. Feel free to suggest other users, or yourself, to be included! go.bsky.app/UoVRtXp
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Reposted by Brian Kleiboeker
Jon Lim, FRCP PhD @drjonlim.bsky.social · 23/11/2024
🎨 In case anyone need… The NIH BioArt Source is an awesome library of *free* professionally drawn illustrations for scientific presentations or figures. Downloadable in HD. Thank you NIH for this invaluable tool 🙏! Check it out 👇 bioart.niaid.nih.gov
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Reposted by Brian Kleiboeker
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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Reposted by Brian Kleiboeker
bioRxiv Molecular Biology @biorxiv-molbio.bsky.social · 12/11/2024
NLRP1 is activated by palmitic acid and induced in human metabolic dysfunction-associated steatohepatitis www.biorxiv.org/content/10.1101/202…
biorxiv.org
NLRP1 is activated by palmitic acid and induced in human metabolic dysfunction-associated steatohepatitis https://www.biorxiv.org/content/10.1101/2024.11.11.622769v1
Metabolic dysfunction-associated steatotic liver disease (MASLD) is the most prevalent cause of live
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Brian Kleiboeker @bkleiboeker.bsky.social · 11/11/2024
This is a really interesting new preprint by Peter Tontonoz's group at UCLA. They discover a PPARγ–LPCAT3 pathway that links dietary n–6 PUFA intake to adipose expandability and systemic energy balance through unique storage of triglycerides. www.biorxiv.org/content/10.1...
biorxiv.org
Dietary control of peripheral adipose storage capacity through membrane lipid remodelling
Complex genetic and dietary cues contribute to the development of obesity, but how these are integrated on a molecular level is incompletely understood. Here, we show that PPARγ supports hypertrophic ...
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Brian Kleiboeker @bkleiboeker.bsky.social · 08/11/2023
This was a good read - some very exciting translational science! "The PNPLA3 I148M variant increases ketogenesis and decreases hepatic de novo lipogenesis and mitochondrial function in humans"
sciencedirect.com
The PNPLA3 I148M variant increases ketogenesis and decreases hepatic de novo lipogenesis and mitocho...
The PNPLA3 I148M variant is the major genetic risk factor for all stages of fatty liver disease, but the underlying pathophysiology remains unclear. W…
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Brian Kleiboeker @bkleiboeker.bsky.social · 03/11/2023
Porphyromonas gingivalis is a gram-negative anaerobic bacterium which is commonly found in the oral cavity and has been implicated in the pathogenesis of chronic periodontitis, but is also associated with other conditions such as bacterial vaginosis and Alzheimer’s disease. Here, we perform ...
sciencedirect.com
Lipidomic analysis of Porphyromonas gingivalis reveals novel glycerol bisphosphoceramide, phosphatid...
Porphyromonas gingivalis, like other members of the phylum Bacteroidetes (synonym Bacteroidota), synthesizes several classes of dihydroceramides and p…
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Brian Kleiboeker @bkleiboeker.bsky.social · 22/09/2023
This summer I worked on a rotation project looking at the role of arachidonic acid (AA) remodeling into macrophage phospholipids in atherosclerosis, a topic about which there’s some interesting literature dating back to 1994 (PMID: 8181456)....
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Brian Kleiboeker @bkleiboeker.bsky.social · 20/09/2023
A very interesting idea: could adipose tissue cellularity be regulated by the terminal complement cascade? I’ve never thought about any components of the innate immune system in adipose tissue that weren’t macrophages…. www.nature.com/articles/s41...
nature.com
Control of adipose tissue cellularity by the terminal complement cascade - Nature Reviews Endocrinol...
Adipocytes have high levels of many components of the complement system. These components are involved in antimicrobial activities, but also have the potential to regulate the maintenance and turn-ove...
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