Tim Cummins
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tdcumminsphd.bsky.social
Tim Cummins
@tdcumminsphd.bsky.social
Kidney Proteomics and Biochemistry junior Assoc. Professor:

Phospho, Ub, Single Cell Proteomics, Pediatric Nephrotic Syndrome, Glomerular Disease, Diabetic Kidney Disease, Cell Signaling, Motility. Uninephrectomized!
Reposted by Tim Cummins
Discoveries in antigens for membranous nephropathy, a top nephrotic syndrome cause, expand diagnosis & treatment potentials. PMID:40691733, Nat Rev Nephrol 2025, @NatRevNeph https://doi.org/10.1038/s41581-025-00980-z #Medsky #Pharmsky #RNA #ASHG #ESHG 🧪
Antigens in membranous nephropathy: discovery and clinical implications | Nature Reviews Nephrology
Membranous nephropathy is an autoimmune disease that results in an accumulation of antigen–antibody (IgG) immune complexes along the subepithelial region of the glomerular basement membrane and is the most common cause of nephrotic syndrome in adults. The diagnosis of membranous nephropathy is based on the presence of granular IgG on immunofluorescence microscopy and subepithelial electron dense deposits along the glomerular basement membrane on electron microscopy. Prior to 2009, the target antigen within the immune complexes was unknown. However, in the past 15 years, and in particular the past 5 years, several target antigens have been identified. These target antigens include PLA2R, THSD7A, EXT1 and EXT2, NELL1, SEMA3B, NCAM1, CNTN1, HTRA1, FAT1, PCDH7, NTNG1, PCSK6, NDNF and MPO. Several rare putative antigens have also been reported. These findings have transformed our understanding of membranous nephropathy from that of an idiopathic disease, which results from an autoimmune res
doi.org
October 3, 2025 at 2:10 AM
The UofL contingent proteomics crew spanning 25 yrs and all kinds of areas of mass spectrometry. Staff Excellence Awards!
November 18, 2025 at 10:05 PM
Parallelized LC-MS analysis to multiplex and allow 100 samples per day! Essentially — a 3 column separation at 3 time points then merged to emit into the same detector at offset retention times. Analyzing the data is the complicated part; they solved that too! Very cool method.
Increasing Mass spectrometry throughput using time encoded sample multiplexing | Jason Derks
YouTube video by Parallel Squared Technology Institute
youtu.be
November 18, 2025 at 8:11 AM
Ironic (maybe I'm using this the wrong way) to see someone shrug off my findings at a meeting as yeah well that is pretty expected... then find they published the exact same thing within a week in the title of the paper! I guess they wanted me to tell them the novel things they missed ;)

LOL
November 17, 2025 at 6:36 AM
The oldest instrument (linear ion trap) in the lab is less sensitive than the newest and greatest shiny orbitrap, yet the old instrument has yielded some of the best results thus far. Sample prep is the key. Zeroed in FWHM doesn't overcome bad samples. Speed-accuracy-sample prep, which is the key?
November 14, 2025 at 6:20 AM
My nephew’s dream was to become a firefighter and save lives. He never thought he would be responding to an airliner crash in our hometown. Amazing kid — if ever I need help, I can call him for anything.
November 12, 2025 at 6:59 AM
#KidneyWeek 2025 Houston. Podocyte injury and nephrotic syndrome proteomics was very popular with lots of discussion and interactions. SRNS, SSNS.

Astros World Series. Rustic lunch.
November 8, 2025 at 9:44 PM
#KidneyWeek Houston. One of the best in terms of collegial interactions and discussions. Spending time thinking about better ways to answer kidney related questions, with a mass spectrometer, of course ;)
November 8, 2025 at 7:48 AM
The big kidney meeting is this week in Houston, Texas. I will be there postering about mass spectrometry and kidney disease and 3 other collaborators from our Kidney and Proteomics Technology Center out of UofL.
November 3, 2025 at 1:07 PM
A billion dollars worth of tubing that previously cost 83 dollars.
October 30, 2025 at 3:37 PM
Why stop at 2-factor authentication, let us have 8 factor and 128 bit encryption recalled by memory.... not that big of a deal...... 🤔
October 29, 2025 at 1:01 PM
"PrimateAI-3D, a deep learning model trained on millions of benign primate variants"

'AI' (neural network) analysis of non-human primate genetic sequence data to make predictions about human mutations.

Main citation where this tool is illustrated--> www.science.org/doi/10.1126/...
PrimateAI-3D
PrimateAI-3D algorithm is a semi-supervised 3D-convolutional neural network for variant pathogenicity prediction, trained on 4.5 million common missense variants with likely benign consequence and pre...
primateai3d.basespace.illumina.com
October 25, 2025 at 8:49 AM
You don't need a bazillion units of resolution to identify key features of biology and pathology. The work (ca 2008) to identify auto-antigens in MN was performed on a 2005 installed linear ion trap.

Mostly, you need the latest greatest instruments/tools to convince funding reviewers. 🤨
October 24, 2025 at 10:11 AM
The best way to learn new science, review out the comfort zone!
October 15, 2025 at 12:59 PM
On the to do read list. Urine protein biomarkers are coming to the forefront of diagnostic and prognostic usage in CKD and other diseases; mass spectrometers will be critical in forging the way forward. Keep building those sample repositories and the instrumentation and expertise will get us there.
October 13, 2025 at 7:52 AM
Predicting protein-protein interactions.

They '...systematically screened 200 million human protein pairs and predicted 17,849 interactions with anexpected precision of 90%, of which 3,631 interactions were not identified in previous experimental screens.'

www.science.org/doi/epdf/10....
Predicting protein-protein interactions in the human proteome
Protein-protein interactions (PPI) are essential for biological function. Coevolutionary analysis and deep learning (DL) based protein structure prediction have enabled comprehensive PPI identificatio...
www.science.org
September 30, 2025 at 2:45 PM
Some of our label-free methods for quantitative proteomic analysis in diabetic nephropathy.
Comparative Proteomic Analysis of Whole Kidney, Medulla, and Cortical Tubules in Diabetic Pathogenesis of Kidney Injury in Mice - PubMed
Defining the sequence of events in renal disease is the cornerstone of clinical practice in the nephrologist toolkit. Tissue proteomic analyses are a significant approach to understanding the fundamen...
pubmed.ncbi.nlm.nih.gov
September 16, 2025 at 10:45 AM
Our working defining patient subgroups with FSGS and MCD applying urine proteomics.
Defining subgroups of pediatric nephrotic patients with urine proteomics - PubMed
The molecular pathophysiology of nephrotic syndrome remains largely elusive in pediatric patients. While most children with minimal change disease (MCD) show favorable responses to immunosuppressive t...
pubmed.ncbi.nlm.nih.gov
September 16, 2025 at 10:44 AM
Reposted by Tim Cummins
Mass Spectrometry With Data-Independent Acquisition for the Identification of Target Antigens in Membranous Nephropathy

bit.ly/4ccCs4H #OpenAccess

#VisualAbstract
March 31, 2025 at 4:07 PM
Reposted by Tim Cummins
This one is a no-brainer

Become an FASN @asnkidney.bsky.social

My pitch at the last #KidneyWk

youtu.be/9uzq2KIjuNk?...

#NephSky

(h/t @sunilbadve.bsky.social )
Join ASN as a FASN Member
YouTube video by American Society of Nephrology
youtu.be
March 31, 2025 at 1:13 AM
Cerium (3+) enrichment of phosphopeptides using magnetic black phosphorus nanosheets. Clever metal affinity options!
Design of Ce3+ ions functionalized magnetic black phosphorus nanosheets for highly efficient enrichment of phosphopeptides
The abnormal variation of phosphorylation can lead to many human diseases, such as Alzheimer's disease and cancer. Because of its high throughput and …
www.sciencedirect.com
March 31, 2025 at 9:41 AM
Ubiquitin enrichment approaches (K-ε-GG peptide enrichment) and targeted PRM mass spectrometry analysis.
Ca2+-triggered (de)ubiquitination events in synapses
Neuronal communication relies on neurotransmitter release from synaptic vesicles (SVs), whose dynamics are controlled by Ca2+-dependent pathways, as many thoroughly studied phosphorylation cascades. H...
www.mcponline.org
March 19, 2025 at 7:51 AM
Combining Zr4+-IMAC, TiO2-IMAC, SH2-Superbinder, DDA and DIA to assess cell response to Zanubrutinib protein kinase inhibitor. This is a nice method for phosphoproteomics!

pubs.acs.org/doi/10.1021/...
Ultradeep Phosphoproteomics for Assessing Protein Kinase Inhibitor Selectivity on a Proteome Scale
The selectivity of protein kinase inhibitors (PKIs) remains a major challenge in drug discovery. In this study, we present an ultradeep phosphoproteomics approach for assessing PKI selectivity and elucidating mechanisms of action using Zanubrutinib as a model. Two complementary phosphoproteomics strategies were employed: phosphopeptides enriched with Zr4+-IMAC in combination with TiO2 beads were analyzed using data-independent acquisition (DIA), while tyrosine phosphopeptides enriched with SH2-Superbinder were analyzed via data-dependent acquisition (DDA). The comprehensive phosphoproteomic analysis identified that 97 and 316 phosphosites were significantly altered upon Zanubrutinib stimulation in the DDA and DIA data sets, respectively. Bioinformatics analysis of these phosphoproteins provided a detailed selectivity profile of Zanubrutinib, offering insights into its mechanism of action at the molecular level. Compared to existing methods, our approach is more comprehensive, has higher throughput, and is more precise─not only for PKI selectivity assessment but also for broader cell signaling research.
pubs.acs.org
March 19, 2025 at 7:42 AM