Minimal experimental requirements for definition of extracellular vesicles and their functions: a position statement from the International Society for Extracellular Vesicles

Jan Lötvall, Andrew F. Hill, Fred H. Hochberg, Edit I. Buzás, Dolores Di Vizio, Chris Gardiner, Yong Song Gho, Igor V. Kurochkin, Suresh Mathivanan, Peter J. Quesenberry, Susmita Sahoo, Hidetoshi Tahara, Marca H. M. Wauben, Kenneth W. Witwer, Clotilde Théry · Journal of Extracellular Vesicles · 2014 · biology · 10.3402/jev.v3.26913 · record lotvall2014-minimal-experimental-requirements
tag layer · index · concepts · authors · עברית
Where this record's text came from. 2026-08-22 and 2026-08-26 schema-0.3 passes: 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. Update, 11 September 2026: title completed from Crossref (https://doi.org/10.3402/jev.v3.26913); it had been cut at 150 characters by an internal tool 'display_name[:150]',
How to read this page. The article itself is not reproduced here — this paper is not cleared for redistribution, so what follows is the tag layer alone. The evidence sentences are withheld with the article. The table at the foot lists every tag the record carries; each row names the facet it belongs to, and the whose words column says whether the tag records the paper's own wording or the tagger's sentence about the paper. Every tag links to each other paper in the corpus carrying it. The machine-readable edition of the same thing is the TEI file beside this one, where the tags live in standOff, and the article is at its publisher via the link below. 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 WITHDRAWN AND REPLACED — the entry was wrong, and a corrected version of it appears in the entries below.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 An entry we have WITHDRAWN is removed from this page and kept in the record, with its reason.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.
Other fields define these differently the same word, defined another way in another discipline
gold-standard 4 fields · exosomes 3 fields

Tags on this paper

Every tag the record carries, each linking to every other paper in the corpus that carries it. A tag appears here whether or not its words occur in the article — the spans below are only the ones a sentence in this paper licenses. Of the 8 concept tags on this paper, all 8 are grounded in a quoted sentence. All carry the tagger's gloss of what the term means in this paper, which is not something the article can license.
extracellular vesicles exosomes microvesicles markers lipoproteins gold-standard buzz term semi-quantitative expert-consensus
Method, as described: a position statement by the ISEV Executive Committee, with the field's own term usage measured from a PubMed count by year

Legend

relation to other workclaim_relationshow this paper stands to another: agrees, contradicts, extends, qualifies
claim typeclaim_typethe shape of the claim: existence, mechanism, method, critique, prediction, null
concept edgeconcept_edgesan asserted relation between two concepts, with the sentence asserting it
conceptconceptsan idea the paper works with, quoted where the paper uses it
content tagcontent_tagsa finding, definition, quantity, statistic or variable named in the paper
contributioncontributionwhat the paper claims to add
controlcontrolsan experiment run to eliminate a rival explanation
limitationlimitationswhat the paper says its evidence cannot support
mechanismmechanismshow the reported effect is said to come about
methodmethodhow the paper produced its evidence
object of studyobject_of_studywhat the paper is about — the thing it investigates
phenomenonphenomenonthe effect or regularity under study
research questionresearch_questionthe question the paper sets itself
sensesensesa distinct use of a term, quoted where the paper fixes it

The paper

The full text is not reproduced here. This article is not cleared for redistribution, so the page carries the tag layer only. Its evidence sentences are withheld; the grounding status remains with each tag, and the article itself is at https://doi.org/10.3402/jev.v3.26913. The reading view exists for the papers whose licence permits it.

Every tag on this page

claim_relations 3 · claim_type 1 · concept_edges 2 · concepts 8 · content_tags 13 · contribution 1 · controls 4 · limitations 6 · mechanisms 5 · method 1 · object_of_study 1 · phenomenon 1 · research_question 1 · senses 6

Relations on this page carry a quotation for the claim. Where a relation was separately evidenced — and so tested against the vocabulary for its type — the row says so; none of 2 relations here carry that mark. The rest are the tagger’s reading of the sentence quoted beside them.

facettagfieldconf.whose words
object_of_studyextracellular vesicles, and what a study must report before it may attribute a cargo or a function to them rather than to whatever co-isolated with them
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
object_of_studythe paper's words
research_questionwhat minimal evidence licenses the claim that the material in the tube is EVs, when no method produces a pure EV fraction
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
research_questionthe paper's words
contributiona minimal set of biochemical, biophysical and functional standards, published as an ISEV position statement, together with an explicit admission that the field cannot yet name markers that would distinguish its own subtypes
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
contributionthe paper's words
claim_typemethod
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
claim_typethe paper's words
phenomenonsecreted membrane-enclosed vesicles that co-isolate with non-vesicular carriers of the same cargo - protein complexes and lipoproteins
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
phenomenonthe paper's words
methodexpert-consensus
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
methodthe paper's words
mechanismsextracellular RNA travels in NON-VESICULAR carriers too - AGO2 protein complexes, HDL and LDL - so a functional result attributed to EVs may belong to something else in the same preparation
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
mechanisms[0]0.95the tagger's words
mechanismspolymer precipitation, used by commercial kits, does not isolate EVs exclusively and is LIKELY to co-isolate RNA-protein complexes - the named case of a method whose output does not match its label
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
mechanisms[1]0.95the tagger's words
mechanismsTHE FIELD'S MOST-USED WORD HAS NO AGREED MEANING, SAID IN THE FOUNDING GUIDELINE: `The term “exosomes” is the most commonly used word to designate any type of EV, and this has become a “buzz term” for EV-related science. The ACTUAL MEANING of this word, however, is NOT UNIVERSALLY ACCEPTED`. The word is simultaneously the most frequent and the least agreed.
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
mechanisms[2]0.95the tagger's words
mechanismsAND THE REASON NO MARKER CAN SETTLE IT IS STATED AS IMMATURITY, NOT DIFFICULTY: `the field of EV research has not matured to the point that we can propose a list of EV-specific “markers” that distinguish subsets of EVs from each other`. The categories are in use before anything can tell them apart.
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
mechanisms[3]0.95the tagger's words
mechanismsTHE PROTOCOL CHANGES THE OBJECT, STATED IN 2014: `the composition of recovered EVs vary vastly according to the protocols used`. doyle2019 demonstrates the same thing five years later as `different isolation methods ... from the same cell type results in different proteomic profiles`.
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
mechanisms[4]0.95the tagger's words
limitationsTHE FIELD'S MOST-USED WORD HAS NO AGREED MEANING, and its own society says so: `exosomes` is `the most commonly used word to designate any type of EV` and `has become a BUZZ TERM`, whose `actual meaning ... is not universally accepted`
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
limitations[0]0.95the tagger's words
limitationsTHE FIELD CANNOT NAME THE MARKERS ITS OWN CATEGORIES WOULD NEED: it `has not matured to the point that we can propose a list of EV-specific markers` distinguishing EVs budded from the membrane from those of endosomal origin
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
limitations[1]0.95the tagger's words
limitationsthe proteins that were taken for markers are `exosome-ENRICHED` and not `exosome-SPECIFIC` - an enrichment describes a tendency and cannot draw a boundary, which is precisely what the names had been doing with it
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
limitations[2]0.95the tagger's words
limitationsthere is no consensus gold-standard isolation method and therefore no optimal one to prescribe - the document declines to name a method rather than naming a weak one
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
limitations[3]0.95the tagger's words
limitationsone of the field's terms could not even be COUNTED: `microparticle` was excluded from the term-usage figure because it is massively used for non-vesicles
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
limitations[4]0.95the tagger's words
limitationsTHE DOCUMENT CALLS ITSELF AN EDITORIAL: `the minimal requirements presented in this editorial`. It is cited ever after as the first of a numbered guideline series, a status conferred on it later by its successor rather than claimed here.
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
limitations[5]0.9the tagger's words
controlsinvestigators are asked to report proteins NOT expected to be enriched in EVs - Table I group 3 - alongside the ones that are, in at least a semi-quantitative manner and for three or more proteins
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
eliminates: a preparation characterised only by what it was hoped to contain, which cannot reveal co-isolation of other intracellular origins · outcome: absent-declared-unreported
controls[0]0.85the tagger's words
controlsthe EV-containing fluid must be collected gently, limiting cell disruption
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
eliminates: intracellular vesicles released by mechanical damage being counted as extracellular ones - the document says the term 'EVs' MAY NOT BE APPROPRIATE for material isolated that way · outcome: absent-declared-unreported
controls[1]0.85the tagger's words
controlsthe field's own term usage is counted from PubMed by year, with non-EV senses of 'exosome' and 'microvesicle' manually removed
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
eliminates: an impression about which words the literature uses, replaced by a count - and the count is honest about what it could NOT measure · outcome: partial
controls[2]0.95the tagger's words
controlswhether any isolation method yields a pure EV fraction, or whether one can be named as the standard
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
eliminates: nothing - the document reports that a totally pure fraction is technically challenging to obtain and that there is no consensus gold standard · outcome: failed
controls[3]0.95the tagger's words
conceptsextracellular vesicles
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
concepts[0]0.95the paper's words
conceptsexosomes
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
also in: exosomes
concepts[1]0.95the paper's words
conceptsmicrovesicles
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
also in: microvesicles
concepts[2]0.95the paper's words
conceptsmarkers
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
also in: markers
concepts[3]0.95the paper's words
conceptslipoproteins
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
also in: lipoproteins
concepts[4]0.95the paper's words
conceptsgold-standard
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
also in: gold-standard
concepts[5]0.95the paper's words
conceptsbuzz term
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
also in: buzz term
concepts[6]0.95the paper's words
conceptsextracellular vesicles
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
concepts[7]0.95the paper's words
sensesextracellular vesicles, 2014 - AS DEFINED HERE BY ENUMERATION, not by property: `exosomes, ectosomes, microvesicles, microparticles, apoptotic bodies and other EV subsets`. The 2023 statement replaces this with three properties (released, bilayer-delimited, non-replicating); THE LIST CAME FIRST AND THE PROPERTY CAME AFTER
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
senses[0]0.95the tagger's words
sensesexosome, 2014 - A BUZZ TERM BY ITS OWN SOCIETY'S ACCOUNT. Used for any EV in practice, defined by endosomal origin in principle, and the isolated material `generally contains a mixture of EVs`. The 2023 statement discourages the word; this one only records that its meaning is not agreed
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
senses[1]0.95the tagger's words
senses`exosome-enriched` versus `exosome-specific` - THE DISTINCTION THE WHOLE PROBLEM TURNS ON, drawn here in 2014. A marker that is merely enriched cannot separate subsets; the field's subtype names had been treating enrichment as though it were specificity
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
senses[2]0.95the tagger's words
sensesthe 2014 HOPE - `we hope to eventually be able to provide specific markers and characteristics of EV subtypes`. READ AGAINST MISEV2023, WHICH REPORTS NO UNIVERSAL MARKERS AND DISCOURAGES THE TERMS, this is a field holding a definition open for nine years and then closing it the other way
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
senses[3]0.95the tagger's words
senses`gold-standard` DENIED, WITH THE CONSEQUENCE DRAWN: `Quotation withheld` The absence of agreement is treated as barring a claim, not merely as an open question.
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
senses[4]0.95the tagger's words
sensesA SOCIETY NAMES A CATEGORY AND THE LITERATURE DOES NOT FOLLOW: `the term “extracellular vesicles,” chosen as generic term at creation of ISEV in September 2011, is steadily growing` - while `from 2004 onwards, the term “exosome” has become the most often used`. A dated act of naming, and a measured record of it not taking.
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
senses[5]0.9the tagger's words
claim_relationscritiques → commercial EV/exosome isolation kits and polymer precipitation methods, on the ground that they do not isolate EVs exclusively and co-isolate RNA-protein complexes
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
claim_relations[0]0.95the tagger's words
claim_relationscritiques → the use of 'exosome' as a category label, on the ground that its meaning is not universally accepted and the isolated material is a mixture
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
claim_relations[1]0.95the tagger's words
claim_relationscritiques → attributing a cargo or function to EVs from a preparation that also contains AGO2 complexes and lipoproteins carrying the same extracellular RNA
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
claim_relations[2]0.95the tagger's words
concept_edgesexosomes —is-a→ extracellular vesicles
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
strength of the relation: 1 · note: REPLACES the withdrawn 'part-of' edge on the same pair and the same sentence. The relation is class membership: the evidence names a class and lists its members.
concept_edges[2]0.95the tagger's words
concept_edgesmicrovesicles —is-a→ extracellular vesicles
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
strength of the relation: 1 · note: REPLACES the withdrawn 'part-of' edge on the same pair and the same sentence. The relation is class membership: the evidence names a class and lists its members.
concept_edges[3]0.95the tagger's words
content_tagsA SOCIETY CALLS ITS FIELD'S MOST-USED WORD A BUZZ TERM. `exosomes` designates any type of EV in practice and its actual meaning is NOT UNIVERSALLY ACCEPTED
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.findings[0]0.95the tagger's words
content_tagsTHE FIELD CANNOT LIST THE MARKERS ITS CATEGORIES WOULD NEED - it `has not matured to the point` where EV-specific markers distinguishing membrane-budded from endosomal EVs can be proposed
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.findings[1]0.95the tagger's words
content_tagsproteins commonly found in exosome preparations are exosome-enriched, not exosome-specific, since EV subsets share many markers
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.findings[2]0.95the tagger's words
content_tagscommon EV isolation protocols do not fully separate non-vesicular entities from EVs
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.findings[3]0.95the tagger's words
content_tagsthe authors hope eventually to provide specific markers and characteristics of EV subtypes
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.findings[4]0.95the tagger's words
content_tagsfrom 2004 the term `exosome` overtook every alternative in the literature, while `extracellular vesicles` - chosen as the generic term at ISEV's founding in 2011 - was only steadily growing
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.findings[5]0.95the tagger's words
content_tagsONE OF THE FIELD'S OWN TERMS COULD NOT BE COUNTED: `microparticle` was excluded from the usage figure because it is massively used to refer to non-vesicles
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.findings[6]0.95the tagger's words
content_tagssecreted membrane-enclosed vesicles, collectively named - including exosomes, ectosomes, microvesicles, microparticles, apoptotic bodies and other EV subsets. A definition by enumeration
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.definitions[0]0.95the tagger's words
content_tagsthe most commonly used word for any type of EV, whose actual meaning is not universally accepted - called a buzz term by its own society
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
also in: exosomes
content_tags.definitions[1]0.95the tagger's words
content_tagsor more proteins, reported semi-quantitatively, as the minimum characterisation of any EV preparation
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.quantities[0]0.95the tagger's words
content_tagsthe year from which `exosome` became the most-used term in the EV literature, against `extracellular vesicles` chosen as the generic term in 2011
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.quantities[1]0.95the tagger's words
content_tagssemi-quantitative
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
content_tags.statistics[0]0.95the tagger's words
content_tagsmarkers
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
also in: markers
content_tags.variables[0]0.95the tagger's words

Interpretive choices

Tags that could not be placed in the text:

What was deliberately not tagged, and why, is recorded per paper by the tagger. Where a paper has no such record, this page says so rather than implying that nothing was declined.

© 2026 Shir Sivroni · ORCID 0009-0000-2597-2824