{"data":{"sci_version": "1.2", "schema": "https://corpus.bntrg.co.uk/sci/1.0/sci.schema.json", "id": "pmid:38507902", "kind": "science-record", "revision": 3, "content_hash": "sha256:b957da823c240ae9ca193a63a77b846af37cad2f7e5a1af1d6c27da98a1e8cdf", "created_at": "2026-11-01T19:20:27Z", "updated_at": "2026-11-01T21:32:43Z", "generator": {"name": "corpus-assay-engine", "run_id": "reading-sci-2026-11-01"}, "paper": {"state": "complete", "title": "High-Throughput Mass Spectrometry Analysis of N-Glycans and Protein Markers after FUT8 Knockdown in the Syngeneic SW480/SW620 Colorectal Cancer Cell Model.", "doi": "10.1021/acs.jproteome.3c00833", "pmid": "38507902", "authors": ["Rubén López-Cortés", "Laura Muinelo-Romay", "Almudena Fernández-Briera", "Emilio Gil Martín"], "journal": "Journal of proteome research", "year": 2024, "abstract": "Disruption of the glycosylation machinery is a common feature in many types of cancer, and colorectal cancer (CRC) is no exception. Core fucosylation is mediated by the enzyme fucosyltransferase 8 (FucT-8), which catalyzes the addition of α1,6-l-fucose to the innermost GlcNAc residue of N-glycans. We and others have documented the involvement of FucT-8 and core-fucosylated proteins in CRC progression, in which we addressed core fucosylation in the syngeneic CRC model formed by SW480 and SW620 tumor cell lines from the perspective of alterations in their N-glycosylation profile and protein expression as an effect of the knockdown of the FUT8 gene that encodes FucT-8. Using label-free, semiquantitative mass spectrometry (MS) analysis, we found noticeable differences in N-glycosylation patterns in FUT8-knockdown cells, affecting core fucosylation and sialylation, the Hex/HexNAc ratio, and antennarity. Furthermore, stable isotopic labeling of amino acids in cell culture (SILAC)-based proteomic screening detected the alteration of species involved in protein folding, endoplasmic reticulum (ER) and Golgi post-translational stabilization, epithelial polarity, and cellular response to damage and therapy. This data is available via ProteomeXchange with identifier PXD050012. Overall, the results obtained merit further investigation to validate their feasibility as biomarkers of progression and malignization in CRC, as well as their potential usefulness in clinical practice.", "claims": [{"id": "claim-method", "statement": "To explore the differences in glycan traits, the Student’s t-test was performed using IBM SPSS Statistics v26 software.", "kind": "methodological", "target": null, "evidence": [{"asset": "source:pmid:38507902", "locator": "sections[13] \"Statistical Analysis\" paragraph 2", "quote": "To explore the differences in glycan traits, the Student’s t-test was performed using IBM SPSS Statistics v26 software."}], "state": "complete"}, {"id": "claim-data-access", "statement": "Supporting Information AvailableThe Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.jproteome.3c00833.SIMCA and PCA analysis for glycomic data from the SW480/SW620 shFUT8 cell model (Figure S1); representative MS2 fragmentation pattern of a monofucosylated N-glycan, and a α(2,6)-terminal sialic acid N-glycan (Figure S2); N-glycosidic structures assigned to m/z signals under the classification criteria of Glyco-Peakfinder software (Figure S3); graph showing the average isotopic incorporation rate in SILAC experiments (Figure S4); and list of differentially expressed proteins detected in the SW480/SW620 shFUT8 cell model by LC-ESI-LTQ Orbitrap MS after SILAC (Table S1) (PDF)All m/z data used for the N-glycomics analysis of the SW480/SW620 shFUT8 cell model (XLSX)All m/z data used for the proteomics analysis of the SW480/SW620 shFUT8 cell model (XLSX)", "kind": "methodological", "target": null, "evidence": [{"asset": "source:pmid:38507902", "locator": "sections[20] \"notes\" paragraph 1", "quote": "Supporting Information AvailableThe Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.jproteome.3c00833.SIMCA and PCA analysis for glycomic data from the SW480/SW620 shFUT8 cell model (Figure S1); representative MS2 fragmentation pattern of a monofucosylated N-glycan, and a α(2,6)-terminal sialic acid N-glycan (Figure S2); N-glycosidic structures assigned to m/z signals under the classification criteria of Glyco-Peakfinder software (Figure S3); graph showing the average isotopic incorporation rate in SILAC experiments (Figure S4); and list of differentially expressed proteins detected in the SW480/SW620 shFUT8 cell model by LC-ESI-LTQ Orbitrap MS after SILAC (Table S1) (PDF)All m/z data used for the N-glycomics analysis of the SW480/SW620 shFUT8 cell model (XLSX)All m/z data used for the proteomics analysis of the SW480/SW620 shFUT8 cell model (XLSX)"}], "state": "complete"}], "gaps": []}, "experiment": {"state": "complete", "objective": "", "steps": [{"id": "read_published_estimate", "order": 1, "name": "Read the published estimate from the source", "kind": "other", "state": "complete", "blocked_on": null, "description": "The claim, method and evidence span published with the source article.", "duration_hours": null, "parameters": {}, "inputs": ["source:pmid:38507902"], "outputs": ["the published estimate and its evidence"], "instruments": [], "reagents": []}, {"id": "obtain_source_data", "order": 2, "name": "Obtain the source data from the named repository", "kind": "data-preparation", "state": "complete", "blocked_on": null, "description": "The GEO series accession resolves and its sample accessions are listed. This lane did not download the dataset or read its licence.", "duration_hours": null, "parameters": {}, "inputs": ["data:geo:PXD050012"], "outputs": ["the source data with its repository provenance"], "instruments": [], "reagents": []}, {"id": "run_analysis", "order": 3, "name": "Run the published analysis", "kind": "analysis", "state": "complete", "blocked_on": null, "description": "Apply the paper's statistical method to the resolved series and compare the result with the published target.", "duration_hours": null, "parameters": {}, "inputs": ["data:geo:PXD050012"], "outputs": ["the replicated result and its comparison"], "instruments": [], "reagents": []}], "materials": [], "instruments": [], "reagents": [], "conditions": {}, "gaps": []}, "data": {"state": "partial", "assets": [{"id": "source:pmid:38507902", "role": "manuscript", "format": "xml", "media_type": "application/xml", "uri": "https://doi.org/10.1021/acs.jproteome.3c00833", "sha256": "sha256:d1350e9862d09d172f2ab30ad0fc8e5addf1c4b94fa61b2896f41bd0b0e6c471", "bytes": 75821, "access": "open", "state": "resolved", "reader": null, "reader_status": "reader_required", "identifier": "10.1021/acs.jproteome.3c00833", "version": null, "note": "Full article fetched from PMC; the checksum covers the rendered section body, not the original XML bytes.", "structure": {"pmcid": "PMC11002942", "source": "europe_pmc_fulltext", "coverage": "whole_body_without_references", "text_hash_scope": "rendered_section_body"}}, {"id": "data:geo:PXD050012", "role": "raw", "format": "geo-series", "media_type": "application/vnd.ncbi.geo-series+json", "uri": "https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=PXD050012", "sha256": null, "bytes": null, "access": "open", "state": "resolved", "reader": null, "reader_status": "reader_required", "identifier": "PXD050012", "version": null, "note": "Supporting Information AvailableThe Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.jproteome.3c00833.SIMCA and PCA analysis for glycomic data from the SW480/SW620 shFUT8 cell model (Figure S1); representative MS2 fragmentation pattern of a monofucosylated N-glycan, and a α(2,6)-terminal sialic acid N-glycan (Figure S2); N-glycosidic structures assigned to m/z signals under the classification criteria of Glyco-Peakfinder software (Figure S3); graph showing the average isotopic incorporation rate in SILAC experiments (Figure S4); and list of differentially expressed proteins detected in the SW480/SW620 shFUT8 cell model by LC-ESI-LTQ Orbitrap MS after SILAC (Table S1) (PDF)All m/z data used for the N-glycomics analysis of the SW480/SW620 shFUT8 cell model (XLSX)All m/z data used for the proteomics analysis of the SW480/SW620 shFUT8 cell model (XLSX)", "structure": {"repository": "GEO", "access_route": "GEO accession URL", "access_statement_verbatim": "Supporting Information AvailableThe Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.jproteome.3c00833.SIMCA and PCA analysis for glycomic data from the SW480/SW620 shFUT8 cell model (Figure S1); representative MS2 fragmentation pattern of a monofucosylated N-glycan, and a α(2,6)-terminal sialic acid N-glycan (Figure S2); N-glycosidic structures assigned to m/z signals under the classification criteria of Glyco-Peakfinder software (Figure S3); 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The physical bench the paper used is not, so a physical validation cannot be run here."}, "data": {"tier": "R1", "reachable": true, "accessions": ["PXD050012"], "resolved_accessions": ["PXD050012"], "statements": ["Supporting Information AvailableThe Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.jproteome.3c00833.SIMCA and PCA analysis for glycomic data from the SW480/SW620 shFUT8 cell model (Figure S1); representative MS2 fragmentation pattern of a monofucosylated N-glycan, and a α(2,6)-terminal sialic acid N-glycan (Figure S2); N-glycosidic structures assigned to m/z signals under the classification criteria of Glyco-Peakfinder software (Figure S3); graph showing the average isotopic incorporation rate in SILAC experiments (Figure S4); and list of differentially expressed proteins detected in the SW480/SW620 shFUT8 cell model by LC-ESI-LTQ Orbitrap MS after SILAC (Table S1) (PDF)All m/z data used for the N-glycomics analysis of the SW480/SW620 shFUT8 cell model (XLSX)All m/z data used for the proteomics analysis of the SW480/SW620 shFUT8 cell model (XLSX)"], "basis": "The paper names PXD050012 in ProteomeXchange Consortium via the PRIDE partner repository and the accession resolves in the repository. 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Work-type validation does not validate methods.","Operation coverage describes only explicitly named methods. It does not prove a complete protocol, compatible parameters, successful compilation or re-execution. Unrecognised or ambiguous methods require review.","Data reachability is a textual accession or public-data statement. No dataset was downloaded or checked for access, completeness or licence.","Capabilities are planning states seeded from the dated equipment register. No bench ownership, completed quote or partner booking is inferred. Procurement counts are dependencies, not guaranteed replications or financial returns.","Tier and blocker counts are deterministic assessments of this corpus, not measured agreement. R3 is reserved for procurement; unresolved methods and data require human work (R4). The most restrictive axis wins, with capability, method, data as tie-breaks. 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At the evidence floor the work type comes from title framing and a fixed prior, not from anything in the paper, so the published work-type split should be read as a rough triage signal rather than a measured distribution. The impact is bounded but not removed: since 2026-10-23 the engine excludes floor-confidence records from the shortlist entirely and publishes them separately as held out, so the recommendation is unaffected even though the census is.","status":"unverified","severity":"high"},{"code":"runtime_is_modelled","basis":["Runtime is summed from published per-assay hour figures. Timing awaits the first executed replication.","4,407 of 5,529 records (79.7%) model to 0.00 hours because no assay was matched, which the ranking then reads as \"cheapest\".","0 of 10 shortlisted records carry a 0.00-hour estimate."],"claim":"Estimated replication runtime","gloss":"The hour figures are estimates built from assay mentions; timing awaits the first executed replication.","detail":"The hour figures are a cost model derived from the bench steps implied by each matched assay family. The first executed replication will supply measured timing. Records without an assay match currently receive a zero-hour model value.","status":"unverified","severity":"high"},{"code":"signal_score_without_citations","basis":["5,529 of 5,529 records (100.0%) have no citation count from the source metadata."],"claim":"Signal score","gloss":"The signal score uses publication-type weight because the mirror supplied zero citation counts.","detail":"The source supplied no citation counts for any record in this run, so the signal score is publication-type weight only. The citation term of the ranking is inert here, and the shortlist is ordered by publication type alone.","status":"unverified","severity":"high"},{"code":"abstract_absent","basis":["1,667 of 5,529 records (30.2%) carry no abstract at all."],"claim":"Evidence base for classification","gloss":"Some records contain a title and publication type only, defining the available classification evidence.","detail":"Where the mirror contains a title and publication types only, those fields define the classifier evidence. A methods section is required for fuller automated and human review.","status":"unverified","severity":"medium"},{"code":"classifier_agreement_measured","basis":["Published two-way decision agreement 77.7% (310 of 399 decidable records) from a stratified hand-check of 438 real records.","Three-way diagnostic agreement 73.9% (288 of 390 decidable records).","data_only agreement 75.2% (100 of 133 decidable).","48 record(s) could not be decided from title and abstract and were excluded from the denominator.","56 analysis-only records were published under another work type, so the data_only share is not an upper bound."],"claim":"Published automatable decision","gloss":"This figure has been checked against a human reading the same papers, so we know how often it is right.","detail":"The published automatable / not-automatable distribution comes from a rule-based classifier that was hand-checked against a fixed ground-truth definition. The agreement rates below are measured, not estimated. The three-way work type remains a diagnostic and is reported separately.","status":"measured","severity":"high"},{"code":"llm_comparison_not_measured","basis":["rule_based_v1+lex99e1195c7d6f produced 5,529 of 5,529 classifications.","Measured on 438 labelled records; these are RULE-BASED figures, not model results."],"claim":"Rule-based versus LLM agreement","gloss":"Every number here is the rule engine’s own. Model comparison begins when a working API credential is connected and measured.","detail":"The published two-way decision agreed with a human reading on 310 of 399 decidable records (77.7%). The diagnostic three-way label agreed on 288 of 390 decidable records (73.9%). Every percentage in this run belongs to the rule engine. Model comparison begins when a working API credential is connected and measured.","status":"not_measured","severity":"high"},{"code":"confidence_is_a_band","basis":["low band: 135 of 210 hand-judged records were correct, 64.3% [57.6, 70.5] (95% CI).","medium band: 80 of 104 hand-judged records were correct, 76.9% [68.0, 84.0] (95% CI).","high band: 73 of 76 hand-judged records were correct, 96.0% [89.0, 98.7] (95% CI).","A fitted calibrated probability was built, measured and withdrawn: it overstated held-out accuracy and reorders nothing."],"claim":"Confidence band and evidence score","gloss":"The confidence band carries a measured accuracy interval; 0.85 represents relative rank strength.","detail":"Confidence on this run is a BAND plus its measured accuracy interval. The number stored alongside each record is a monotone evidence score that orders records; 0.85 represents relative rank strength. A fitted probability was withdrawn after it overstated held-out accuracy. Threshold on the band.","status":"measured","severity":"medium"},{"code":"three_way_split_is_diagnostic","basis":["The corpus is published at the two-way decision: automatable or not-automatable. The three-way split (data_only / physical / mixed) is published as a diagnostic with its measured reliability attached, not as a claim, because the rule engine's `mixed` call cannot be defended.","The engine called 22 record(s) mixed; 10 matched the human judgement (45.5%, 95% CI 26.9-65.3).","The engine's `mixed` call is right on 10/22 hand-judged records (45.5%, 95% CI 26.9%-65.3%); a constant `physical` guess scores 36.4%.","The engine's `mixed` call does not reliably beat a constant `physical` guess on the hand-judged records it labels mixed.","The sign of that difference flips between two independent samples, so the three-way refinement is not demonstrably informative.","The mixed stratum contributes a disproportionate share of errors relative to its size.","At title-only depth the physical/mixed split collapses: a title says that work was done, not whether it was also analysed."],"claim":"The published decision is two-way","gloss":"The three-way split is shown for diagnosis only. The published split is two ways.","detail":"Count and filter the corpus on automatable versus not-automatable. The data_only / physical / mixed split remains an internal engine diagnostic because the mixed call has lower measured reliability.","status":"measured","severity":"medium"},{"code":"automatable_flag_unproven","basis":["6 of 29 assay families are marked automatable now: meta_analysis, machine_learning, survival_analysis, pca, molecular_docking, differential_expression.","The flag is a rule over assay family and work type; validation begins with the first executed replication.","It inherits the 75.2% data_only agreement rate, because the flag requires the record to be analysis-only."],"claim":"Automatable now","gloss":"This flag marks assay families the rules classify as data-only. The first executed replication will validate it.","detail":"This flag marks families the rules consider replicable from data alone. Its validity depends on the analysis-only classification and will be measured through an executed replication.","status":"unverified","severity":"medium"}],"confidence_policy":"band_with_measured_interval","confidence_contract":{"policy":"band_with_measured_interval","summary":"Confidence is reported as a BAND with a measured accuracy interval. The raw evidence score supplies monotone ordering. A fitted point estimate was withdrawn after it overstated held-out accuracy.","evidence_score":"A monotone evidence score in [0,1] built from cue mass, axis separation and text coverage. Use it to order records. Interpret 0.85 as relative rank strength.","confidence_band":"low | medium | high. Consumers threshold on this value.","band_accuracy":"Wilson 95% interval on the measured agreement of the hand-judged records in this band.","calibrated_confidence":"WITHDRAWN. 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