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Kesavardan S

@keshu-vrimmch.bsky.social
62 followers 30 following 21 posts

Asst Professor at #Biochemistry, Indian Institute of Science #IISc. Interested in Zoonotic & H5Nx viruses, Bats/Birds, Z-RNAs, Inflammasomes & Cell death.

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Kesavardan S @keshu-vrimmch.bsky.social · 03/02/2026
#DDX3Xsyndrome A genetic neurodevelopmental disorder due to human #DDX3X mutations In our preprint, we reveal highly pathogenic DDX3X syndrome mutations driving the assembly of persistent, solid-like DDX3X-condensates promoting neuronal death and A-beta aggregation. www.biorxiv.org/content/10.6...
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Paul Thomas @pgtimmune.bsky.social · 24/11/2025
Two complementary studies from our group out today: a therapeutic peptide vaccine trial for fibrolamellar carcinoma (FLC) & TIRTL-Seq, our robust method for deep quantitative paired TCR sequencing a🧵w/ @markyarchoan.bsky.social & @pogorely.bsky.social www.nature.com/articles/s41...
nature.com
TIRTL-seq: deep, quantitative and affordable paired TCR repertoire sequencing - Nature Methods
TIRTL-seq is a high-throughput method for paired T cell receptor sequencing at the cohort scale.
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Michelle Wille @duckswabber.bsky.social · 07/11/2025
Its taken a while, but a summary of our "enhanced surveillance" for HPAI that we undertook last spring is now on bioRxiv. Lots of cool LPAI viruses in arriving shorebirds, but no HPAI. 👉 www.biorxiv.org/content/10.1...
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Kesavardan S @keshu-vrimmch.bsky.social · 05/11/2025
Glad to see this research highlight in #NatureIndia on our recent work. The current 2.3.4.4b clade #H5N1 is unusual and spreading rapidly in mammals and shows human adapting potential, a #OneHealth concern, needs more attention. www.nature.com/articles/d44...
nature.com
Cattle may serve as intermediate hosts for avian flu
Mutations get the virus ready to jump
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Bloom lab @jbloomlab.bsky.social · 08/09/2025
In new study led by @ckikawa.bsky.social, we provide near real-time data on human neutralizing antibody landscape to influenza by measuring ~26,000 titers to >100 recent viral strains Data can inform vaccine selection & evolutionary/epidemiological modeling www.biorxiv.org/content/10.1...
biorxiv.org
Near real-time data on the human neutralizing antibody landscape to influenza virus to inform vaccine-strain selection in September 2025
The hemagglutinin of human influenza virus evolves rapidly to erode neutralizing antibody immunity. Twice per year, new vaccine strains are selected with the goal of providing maximum protection again...
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Bloom lab @jbloomlab.bsky.social · 12/03/2025
In study led by @csimonich.bsky.social & Teagan McMahon, we quantify antigenic evolution of RSV F Important because: 1️⃣ RSV top cause of infant hospitalization in USA 2️⃣ New antibodies & vax can prevent hospitalizations 3️⃣ Will virus evolution erode their efficacy? www.biorxiv.org/content/10.1...
biorxiv.org
RSV F evolution escapes some monoclonal antibodies but does not strongly erode neutralization by human polyclonal sera
Vaccines and monoclonal antibodies targeting the respiratory syncytial virus (RSV) fusion protein (F) have recently begun to be widely used to protect infants and high-risk adults. Some other viral pr...
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Kesavardan S @keshu-vrimmch.bsky.social · 13/03/2025
High-throughput neutralization measurements correlate strongly with evolutionary success of human influenza strains. @jbloomlab.bsky.social
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Michelle Wille @duckswabber.bsky.social · 06/03/2025
Great walk through of all the knowns and unknowns of the current HPAI outbreak in US dairy cattle with a focus on both the cattle, but also human pandemic risk. 👉 journals.asm.org/doi/10.1128/...
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Colin Parrish @colinparrish.bsky.social · 07/03/2025
The epidemiology and evolution of H3N2 canine influenza virus in dogs over 20 years. Lead by @brianrwasik.bsky.social shows that spread is determined by the dog population structure. The virus has not become better at transmitting in dogs after 1000s of transfers. pubmed.ncbi.nlm.nih.gov/40040347/
The patterns of recent canine influenza virus spread and evolution in the USA between 2021 and 20224.
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Kesavardan S @keshu-vrimmch.bsky.social · 03/03/2025
This perspective provides a great discussion of H5N1 emergence www.sciencedirect.com/science/arti...
sciencedirect.com
H5N1 influenza: Urgent questions and directions
H5N1 is an avian influenza virus that causes respiratory disease in birds and several land and sea mammals. The recent outbreak in the United States, …
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Kesavardan S @keshu-vrimmch.bsky.social · 03/03/2025
Why did 2.3.4.4b clade #H5N1 need a long stalk N1, unlike the previous clades H5N1s? We identified the emergence of 2.3.4.4b #H5 HA with a distinct #glycosylation pattern in its RBD that drove its preferential pairing with long stalk N1 and the emergence of this novel variant.
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Kesavardan S @keshu-vrimmch.bsky.social · 03/03/2025
Why did the 2.3.4.4b #H5N1 become a #panzootic virus? Given its unprecedented spread, it's important to ask this Qstn. We reported last year, 2.3.4.4b H5N1 features long stalk N1, unlike prev clades. All mammals infected with H5N1 after 2020 (also B3.13&D1.1) show long stalk N1.
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Kesavardan S @keshu-vrimmch.bsky.social · 22/02/2025
Inflammatory cells death comes as an important process determining tissue damage and inflammation. We attempted to explain how this contributes to viral tolerance in bats🦇 Fantastic working with @virology.bsky.social in this discussion. Superb contribution by Subham, Disha, Priyansh&Rita.
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Bloom lab @jbloomlab.bsky.social · 31/01/2025
In a new study led by Caelan Radford, we use deep mutational scanning to systematically compare the escape mutations from two broadly neutralizing antibodies in a clade A versus clade B HIV Envelope. www.biorxiv.org/content/10.1...
biorxiv.org
Comprehensive maps of escape mutations from antibodies 10-1074 and 3BNC117 for Envs from two divergent HIV strains
Antibodies capable of neutralizing many strains of HIV are being explored as prophylactic and therapeutic agents, but viral escape mutations pose a major challenge. Efforts have been made to experimen...
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Kesavardan S @keshu-vrimmch.bsky.social · 28/01/2025
Four lessons COVID taught us about the immune system. www.nature.com/articles/d41...
nature.com
Four lessons COVID taught us about the immune system
In the midst of pandemic upheaval, researchers have gained fundamental insights about how the body fends off infections.
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Kesavardan S @keshu-vrimmch.bsky.social · 16/01/2025
#Inflammazoom
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Avinash Shenoy @avishenoy.bsky.social · 16/01/2025
📢 I'll be hosting Jack Aunty & Kesavardana Sannula in the next InflammaZoom seminar series on Monday 20th Jan at 8am GMT, 1:30pm IST, 7pm AEDT. Register here: @keshu-vrimmch.bsky.social events.abcam.com/event/Inflam...
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T. Ryan Gregory 🇨🇦 @tryangregory.bsky.social · 24/12/2024
The reason H5N1 is a problem is because there's too much restriction on gain of function research? GTFO. www.latimes.com/environment/...
latimes.com
Why scientists say we are fighting H5N1 bird flu with one hand tied behind our backs
When, where and how the H5N1 bird flu virus may evolve and its capacity to spark a pandemic is hard to predict — in part, some researchers say, because of federal restrictions on gain-of-function rese...
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Kesavardan S @keshu-vrimmch.bsky.social · 19/12/2024
How bat-origin pathogenic viruses manipulate human cell death and inflammation. www.eurekalert.org/news-release...
eurekalert.org
How bat-origin pathogenic viruses manipulate human cell death and inflammation
Study offers insights into cell death regulation by viruses like SARS-CoV-2, and how bats and humans respond differently to tricks that such viruses use to manipulate the host’s defense
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Ervin Fodor @efodor.bsky.social · 14/12/2024
Just published - pandemic influenza PB1 genes of avian origin reduce polymerase activity and virulence in low-pathogenic avian influenza viruses. Insights into host adaptation and zoonotic risk. www.science.org/doi/abs/10.1...
science.org
Effect of pandemic influenza A virus PB1 genes of avian origin on viral RNA polymerase activity and pathogenicity
Past influenza pandemics contained polymerase genes from avian influenza viruses, affecting viral replication and pathogenicity.
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Michelle Wille @duckswabber.bsky.social · 03/12/2024
In Uruguay, Sept-Dec 2023: 2713 stranded pinnipeds (S. American SeaLion, S. American Fur Seals); 92.4% were dead, including 80 aborted fetuses. Live animals w clinical signs: tremors, convulsions, extreme weakness. 👉https://www.int-res.com/abstracts/dao/v160/p65-74/
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Kesavardan S @keshu-vrimmch.bsky.social · 22/11/2024
Our recent work: Identified #viralRHIMs in RNA viruses originated from #bats, including SARS-CoV-2. The RHIM in SARS-CoV-2 #Nsp13 shows distinct cell death regulation in bat and human cells. Also, associated with Z-RNA sensing and #ZBP1-RIPK3 signaling. www.cell.com/iscience/ful...
cell.com
Bat RNA viruses employ viral RHIMs orchestrating species-specific cell death programs linked to Z-RNA sensing and ZBP1-RIPK3 signaling
RHIM is a protein motif facilitating the assembly of large signaling complexes triggering regulated cell death. A few DNA viruses employ viral RHIMs mimicking host RHIMs and counteract cell death by i...
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Bloom lab @jbloomlab.bsky.social · 21/11/2024
I’ve updated SARSCoV2 RBD antibody-escape calculator w new deep mutational scanning data of Yunlong Cao & Fanchong Jian. My interpretation: antigenic evolution currently constrained by pleiotropic effects of mutations on RBD-ACE2 affinity, RBD up-down position & antibody neutralization
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ejustin46 @ejustin46.bsky.social · 16/11/2024
H5N1 We are currently at stage 3 in the virus's progression, transitioning from the avian phase to the mammalian phase, and now entering the stage of potential human spillover.
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Kesavardan S @keshu-vrimmch.bsky.social · 18/11/2024
New #humanH5N1 infection analysis: recent human infected 2.3.4.4b H5N1 show #PB2-M631L indicating #dairycattle as the source. But, unlike cattle viruses, human H5N1 shows #HA-I199T and #NA-S71N mutations. bsky.app/profile/kesh...
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Kesavardan S @keshu-vrimmch.bsky.social · 18/11/2024
Our attempt to provide insights into: How non-human mammal 2.3.4.4b #H5N1 is evolving and possibly attaining human adaptation and infection? An unbiased map of 2.3.4.4bH5N1 adaptations in diverse hosts is much needed to follow up on #human H5N1 infections www.biorxiv.org/content/10.1...
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Bloom lab @jbloomlab.bsky.social · 13/11/2024
The final version of our study using pseudovirus deep mutational scanning to measure the effects of mutations influenza H5 hemagglutinin to inform viral surveillance is now published in PLoS Biology: journals.plos.org/plosbiology/...
journals.plos.org
Deep mutational scanning of H5 hemagglutinin to inform influenza virus surveillance
H5 influenza is considered a potential pandemic threat. Using deep mutational scanning, this work reveals how the >10,000 different possible amino-acid mutations in hemagglutinin affect cell entry, re...
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Bloom lab @jbloomlab.bsky.social · 16/11/2024
If you are searching literature, these sites are E190 and Q226 in H3 numbering, E186 and Q222 in mature H5 numbering, and E202 and Q238 in sequential H5 numbering (see: dms-vep.org/Flu_H5_Ameri...)
dms-vep.org
HA sequencing numbering | Deep mutational scanning of H5 influenza HA
Interactive figures and detailed results for deep mutational scanning of the HA from the clade 2.3.4.4b A/American Wigeon/South Carolina/USDA-000345-001/2021 (H5N1) strain.
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