Cited by 77T-cell and B-cell ImmunologyDevelopmental Biology and Gene RegulationHematopoietic Stem Cell Transplantation

T Cell Lineage Determination Precedes the Initiation of TCR β Gene Rearrangement

Open access
Masuda, Kyoko, Kakugawa, Kiyokazu, Nakayama, Toshinori, Minato, Nagahiro, Katsura, Yoshimoto, Kawamoto, Hiroshi·2007·The Journal of Immunology

Abstract

Loss of dendritic cell potential is one of the major events in intrathymic T cell development, during which the progenitors become determined to the T cell lineage. However, it remains unclear whether this event occurs in synchrony with another important event, TCRβ chain gene rearrangement, which has been considered the definitive sign of irreversible T cell lineage commitment. To address this issue, we used transgenic mice in which GFP expression is controlled by the lck proximal promoter. We found that the double-negative (DN) 2 stage can be subdivided into GFP− and GFP+ populations, representing functionally different developmental stages in that the GFP−DN2, but not GFP+DN2, cells retain dendritic cell potential. The GFP+DN2 cells were found to undergo several rounds of proliferation before the initiation of TCRβ rearrangement as evidenced by the diversity of D-Jβ rearrangements seen in T cells derived from a single GFP+DN2 progenitor. These results indicated that the determination step of progenitors to the T cell lineage is a separable event from TCRβ rearrangement.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.4049/jimmunol.179.6.3699

Cites

33 of 33 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • In mouse, natural loss of access to dendritic cell and granulocyte programs agrees with the timing of PU.1 downregulation.

    “there is good agreement between the cells' natural loss of access to the dendritic cell and granulocyte programs, on the one hand, and the timing of PU.1 downregulation, on the other hand (33, 39–42).”

    From Mechanisms of Action of Hematopoietic Transcription Factor PU.1 in Initiation of T-Cell Development (2019) · cites this paper as [39]

    The section on PU.1 downregulation reports that PU.1 becomes undetectable at the GFP-positive DN2 stage, when dendritic-cell potential is completely lost; the Discussion also describes the events as coincident (page numbers unavailable). The paper does not establish the timing of a loss of granulocyte potential, so that part of the claim is unsupported by this source. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Population dynamic models imply that the stages when PU.1 is expressed occupy a minimum of 7-10 intrathymic cell divisions of pro-T cells.

    “Population dynamic models imply that the stages when PU.1 is expressed occupy a minimum of 7–10 intrathymic cell divisions of pro-T cells (39, 66, 67).”

    From Mechanisms of Action of Hematopoietic Transcription Factor PU.1 in Initiation of T-Cell Development (2019) · cites this paper as [39]

    The PU.1 expression section reports expression through GFP-negative DN2 and loss at GFP-positive DN2. The Discussion reports more than 10 DN1–DN2 divisions, while the proliferation results estimate about four divisions after the transition; together these imply more than six divisions before PU.1 becomes undetectable. The paper does not establish the full stated 7–10-division range for PU.1-expressing stages. (LLM, conf=0.82)

    Experimental — accuracy not yet measured
  • These stages span multiple cell cycles in vivo and in vitro.

    “These stages span multiple cell cycles in vivo and in vitro (33, 39, 67, 124).”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Masuda, K., Kakugawa, K., Nakayama, T., Minato, N., Katsura, Y., & Kawamoto, H.
Affiliations
  • Kyoto University (JP)
  • RIKEN (JP)
  • Chiba University (JP)
  • Nihon University (JP)
Venue
The Journal of Immunology
Published
2007-09
Volume
179
Issue
6
Pages
3699-3706
ISSN
  • 0022-1767 (ISSN-L)
  • 1550-6606
OpenAlex
W1538274751
Cited by
77
References
33
Citations by year
2026: 1 · 2025: 1 · 2024: 2 · 2023: 1 · 2022: 4 · 2021: 4 · 2020: 3 · 2019: 4 · 2018: 3 · 2017: 4 · 2016: 7 · 2015: 3 · 2014: 5 · 2013: 6 · 2012: 4
FWCI
2.34
Type
journal article
Language
en
Open access
Locations
  • The Journal of Immunology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Ministry of Education, Culture, Sports, Science and Technology
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
  • Health Sciences › Medicine › Hematology › Hematopoietic Stem Cell Transplantation
Keywords
TCR beta gene rearrangement, double-negative thymocytes, GFP reporter mice, thymocyte proliferation, transgenic mice
MeSH terms
Proto-Oncogene Protein Spi-1, Animals, Cell Differentiation, Cell Division, Cells, Cultured, Dendritic Cells, Mice, Inbred C57BL, Mice, Transgenic, Organ Culture Techniques, Proto-Oncogene Proteins, Stem Cells, Thymus Gland, Gene Rearrangement, beta-Chain T-Cell Antigen Receptor, Trans-Activators, Down-Regulation, T-Lymphocyte Subsets, Receptors, Antigen, T-Cell, alpha-beta, Cell Lineage, Green Fluorescent Proteins, Mice

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review