TIMER2.0 for analysis of tumor-infiltrating immune cells — TEI-tagged view

Taiwen Li, Jingxin Fu, Zexian Zeng, David Cohen, Jing Li, Qianming Chen, Bo Li, X. Shirley Liu · 2020 · medicine · doi:10.1093/nar/gkaa407 · TEI xml · tagged edition · index · concepts · authors
Where this record's text came from. 2026-08-22 schema-0.3 pass: every quote verified as an exact substring of the staged text and anchored at merge time; concept terms verified present; every edge endpoint an existing node.
Other fields define these differently the same word, defined another way in another discipline
deconvolution 2 fields
Tags on this paper every tag the record carries, whether or not the words occur in the text below — a number is how many papers in the corpus carry that tag; a tag with no number is unique to this paper
deconvolution5 cell fractions xCell TIMER system-or-tool-building173
Method, as described: six published algorithms - gene-signature and deconvolution based - applied uniformly to TCGA and to user-supplied profiles, with a heatmap over cancer types

Our tag layer for this paper

Cross-disciplinary analysis
content-tags & facets: phenomenon · claim-type · cross-domain-transfer · mechanism · claim-relation · replication-status · limitation — grounded in the full text
phenomenontumour immune infiltration, whose direct measurement is limited enough that the field works from computational inference instead— “Due to the limitations of direct measurement methods, computational algorithms are often used to infer immune cell composition from bulk tumor transcriptome profiles.”
claim-typemethod— “Instead of just using one algorithm, TIMER2.0 ( http://timer.cistrome.org/ ) provides more robust estimation of immune infiltration levels for The Cancer Genome Atlas (TCGA) or user-provided tumor profiles using six state-of-the-art algorithms.”
method — evidence— “The available computational algorithms ( 7–12 ) for immune infiltration estimation fall into two main categories: gene signature- and deconvolution-based approaches”
object of study — evidence— “While informative, tumor transcriptomics data do not immediately indicate immune cell compositions, which instead require computational inference.”
research question — evidence— “We hope that evaluating estimations from multiple algorithms might help the user gain more comprehensive and robust results.”
contribution — evidence— “Instead of just using one algorithm, TIMER2.0 ( http://timer.cistrome.org/ ) provides more robust estimation of immune infiltration levels for The Cancer Genome Atlas (TCGA) or user-provided tumor profiles using six state-of-the-art algorithms.”
mechanismgene-signature methods score cell-type-specific gene sets INDEPENDENTLY per cell type; deconvolution methods model the tissue's expression as a WEIGHTED SUM of the component cells' profiles. Two different mathematical objects behind one output name— “Deconvolution methods define the problem as mathematical equations that model the gene expression of a tissue sample as the weighted sum of the expression profiles from the cells in the population mix”mechanisms[0]
critiques reliance on any single immune-infiltration algorithm, since the two families have variable performance advantages across cell types and tumours— “These two complementary categories of algorithms have demonstrated variable performance advantages in estimating specific immune cell types in different tumors.”claim_relations[0]
extends the original TIMER web server, which used one algorithm where this uses six— “Instead of just using one algorithm, TIMER2.0 ( http://timer.cistrome.org/ ) provides more robust estimation of immune infiltration levels for The Cancer Genome Atlas (TCGA) or user-provided tumor profiles using six state-of-the-art algorithms.”claim_relations[1]
senseimmune infiltration level - AS DELIVERED BY THIS PLATFORM, SIX DIFFERENT QUANTITIES UNDER ONE HEADING. Two are cell fractions, four are enrichment scores, and the platform's design is to show them together rather than to reconcile them. THE NAME IS THE ONLY THING THE SIX SHARE— “EPIC and quanTIseq have the advantage of directly generating scores interpreted as cell fractions.”senses[0]
senseestimation, AS OPPOSED TO MEASUREMENT - the paper's own framing throughout, and it is honest: direct measurement is limited, so the field infers. Every number this server is cited for is downstream of that sentence— “Due to the limitations of direct measurement methods, computational algorithms are often used to infer immune cell composition from bulk tumor transcriptome profiles.”senses[1]
senserobustness, AS THIS PLATFORM OPERATIONALISES IT: agreement across six algorithms, displayed for the user to judge. Not a statistic, not a test - A LAYOUT. And the authors say they HOPE it helps— “Uniform pre-processing of all the TCGA samples using these algorithms enables users to visualize all the estimations together to reach more confident conclusions.”senses[2]
controlall TCGA samples are pre-processed UNIFORMLY before the six algorithms run, so the estimates differ by algorithm and not by pipeline — held — rules out disagreement between algorithms that is really disagreement between normalisations - which is the only way the side-by-side display could mean anythingcontrols[0]
controlwhether the six estimates are on the same scale — failed
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
— rules out nothing - EPIC and quanTIseq generate cell fractions and the rest do not, and the platform shows all six together without reconciling them
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
controls[1]
controlwhether running six algorithms actually yields more robust results — absent-declared-unreported
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
— rules out nothing that is demonstrated here - the claim is 'We hope ... might help', with no comparison against single-algorithm use reported
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
controls[2]
weightreliance on any single immune-infiltration algorithm, since the two families have variable performance advantages across cell types and tumours — 0.85
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
claim_relations[0]
weightthe original TIMER web server, which used one algorithm where this uses six — 0.9
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
claim_relations[1]
outcomecontrol — held
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
controls[0]
outcomecontrol — failed
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
controls[1]
outcomecontrol — absent-declared-unreported
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
controls[2]
limitationTHE QUANTITY IS NOT MEASURED. `Due to the limitations of direct measurement methods, computational algorithms are often used to infer immune cell composition` - and the transcriptome `does not immediately indicate` it
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
limitations[0]
limitationSIX ALGORITHMS, ONE OUTPUT NAME, AND ONLY TWO PRODUCE A QUANTITY ON A MEANINGFUL SCALE: `EPIC and quanTIseq have the advantage of directly generating scores interpreted as cell fractions`. The other four produce enrichment scores displayed beside them
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
limitations[1]
limitationeach algorithm is named with its own failure: TIMER handles tissue specificity but covers only six cell types, xCell covers more but MAY FAIL TO DETECT SIGNALS FROM HOMOGENEOUS SAMPLES
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
limitations[2]
limitationthe justification for running all six is a HOPE, in the authors' own word: `We hope that evaluating estimations from multiple algorithms might help the user gain more comprehensive and robust results`
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
limitations[3]
limitationand the cross-species use is caveated where it is offered: mouse estimations `should be interpreted with caution since human and the mouse tumors may have different immune properties`
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
limitations[4]
Content tags
content-observations: finding · quantity · variable · definition · key-term — grounded in the full text
finding
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.findings[0]
finding
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.findings[1]
finding
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.findings[2]
finding
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.findings[3]
finding
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.findings[4]
variabletissue specificity
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.variables[0]
definitionDeconvolution
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.definitions[0]
Concepts
terms this paper carries, each with the sentence it was cut from — the layer that joins one paper to another. Terms with no quote yet are on CONCEPTS.html.
conceptdeconvolution — not defined in this paper's own words; modelling a tissue's expression as a weighted sum of its component cells' profiles
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
concepts[0]
conceptcell fractions — not defined in this paper's own words; the scale EPIC and quanTIseq produce directly, and which the other four algorithms do not
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
concepts[1]
conceptxCell — not defined in this paper's own words; the algorithm covering the most cell types, which may fail on homogeneous samples
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
concepts[2]
conceptTIMER — not defined in this paper's own words; the only algorithm accounting for tissue specificity, covering six immune cell types
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
concepts[3]
Statistics — cross-field join keys
field-invariant statistical terms, used in their statistical sense (gated on a number / symbol / test). A p-value or a standard deviation means the SAME thing in physics, biology, psychology and sociology — so these are the strongest cross-field join keys. Grounded verbatim.
deconvolution
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.statistics[0]

When we have changed our mind. Some entries in the table begin with a word in capitals and the reason for it. EVIDENCE CORRECTED — the finding still stands, but we had quoted the wrong sentence from the paper, and the quotation has been replaced with the right one. RETRACTED — the entry itself was wrong; it stays on the page, marked, with the reason, rather than being deleted. WITHDRAWN AND REPLACED — the entry was wrong, and a corrected version of it appears in the entries below. Each mark carries its own reason, in brackets, because the reasons differ from one entry to the next. An entry we have WITHDRAWN is removed from this page and kept in the record, with its reason. A line reading Audit and a date is a later re-reading of the entry against its whole sentence: DOUBTFUL means it was kept, and the reason says what is loose about it. Quotation marks inside the tagger's sentence. Where a tag is the tagger's own sentence, a phrase in quotation marks inside it is borrowed from the paper — the tagger's wording around it is not. The paper's own sentence is the evidence quote for that row; on this page it is withheld with the article, and the article is at its publisher. Nothing inside quotation marks anywhere on this page is ours: if it is quoted, it is the paper's. Whose words a concept carries. A concept entry records a term the paper itself uses, so the term, the sense given for it, and its evidence are the paper's own words, quoted where the paper fixes them. This is the opposite of a sense entry in the tag table, which is the tagger's sentence about how the paper uses a term. Where a concept entry could not be grounded in the paper's words, the entry says so on its own row.

Tag layer © the Meta-Tagging Project, CC BY 4.0. The paper text is © its authors/publisher and is linked, not reproduced. Excerpts shown are short quotations for identification and verification. · back to index · concepts · authors · עברית
© 2026 Shir Sivroni · ORCID 0009-0000-2597-2824