Evidence map›Paper›PMID 34009705›Full record

ArticleCancer science2021

A stealth antigen SPESP1, which is epigenetically silenced in tumors, is a suitable target for cancer immunotherapy.

Akemi Kosaka, Yuki Yajima, Mayumi Hatayama, Katsuya Ikuta, Takaaki Sasaki, Noriko Hirai, Syunsuke Yasuda, Marino Nagata, Ryusuke Hayashi, Shohei Harabuchi and 13 more

Open access · goldAbstract read
In one paragraph

Article in Cancer science, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed
0.7field-weighted citation impact, top 35% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

10 citing papers in PubMed, 10 citations in OpenAlex.

  1. Trial
  2. Age-Associated Proteomic Changes in Human Spermatozoa.International journal of molecular sciences · 2025
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

23 authors at 2 institutions in 2 countries.

Akemi KosakaDepartment of Pathology, Asahikawa Medical University, Asahikawa, Japan.
Yuki YajimaDepartment of Pathology, Asahikawa Medical University, Asahikawa, Japan.
Mayumi HatayamaDivision of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa, Japan.
Katsuya IkutaDivision of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa, Japan.
Takaaki SasakiRespiratory Center, Asahikawa Medical University, Asahikawa, Japan.ORCID https://orcid.org/0000-0002-6505-8786
Noriko HiraiRespiratory Center, Asahikawa Medical University, Asahikawa, Japan.
Syunsuke YasudaRespiratory Center, Asahikawa Medical University, Asahikawa, Japan.
Marino NagataDepartment of Pathology, Asahikawa Medical University, Asahikawa, Japan.
Ryusuke HayashiDepartment of Otolaryngology, Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan.
Shohei HarabuchiDepartment of Otolaryngology, Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan.
Kenzo OharaDepartment of Otolaryngology, Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan.
Mizuho OharaDepartment of Pathology, Asahikawa Medical University, Asahikawa, Japan.
Takumi KumaiDepartment of Otolaryngology, Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan.ORCID https://orcid.org/0000-0002-3411-671X
Kei IshibashiRespiratory Center, Asahikawa Medical University, Asahikawa, Japan.
Yui Hirata-NozakiDepartment of Otolaryngology, Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan.
Toshihiro NagatoDepartment of Pathology, Asahikawa Medical University, Asahikawa, Japan.
Kensuke OikawaDepartment of Pathology, Asahikawa Medical University, Asahikawa, Japan.
Yasuaki HarabuchiDepartment of Otolaryngology, Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan.
Esteban CelisGeorgia Cancer Center, Augusta University Medical College of Georgia, Augusta, GA, USA.
Toshikatsu OkumuraDivision of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa, Japan.
Yoshinobu OhsakiRespiratory Center, Asahikawa Medical University, Asahikawa, Japan.
Hiroya KobayashiDepartment of Pathology, Asahikawa Medical University, Asahikawa, Japan.
Takayuki OhkuriDepartment of Pathology, Asahikawa Medical University, Asahikawa, Japan.ORCID https://orcid.org/0000-0002-6889-7809
Asahikawa Medical University · JPAugusta University · US

Funding

Japan Agency for Medical Research and Development JP16lm0103005Japan Society for the Promotion of Science 16K15244Japan Society for the Promotion of Science 20K07367
6 · The paper itself

Abstract

Recent studies have revealed that tumor cells decrease their immunogenicity by epigenetically repressing the expression of highly immunogenic antigens to survive in immunocompetent hosts. We hypothesized that these epigenetically hidden "stealth" antigens should be favorable targets for cancer immunotherapy due to their high immunogenicity. To identify these stealth antigens, we treated human lung cell line A549 with DNA methyltransferase inhibitor 5-aza-2'-deoxycytidine (5Aza) and its prodrug guadecitabine for 3 d in vitro and screened it using cDNA microarray analysis. We found that the gene encoding sperm equatorial segment protein 1 (SPESP1) was re-expressed in cell lines including solid tumors and leukemias treated with 5Aza, although SPESP1 was not detected in untreated tumor cell lines. Using normal human tissue cDNA panels, we demonstrated that SPESP1 was not detected in normal human tissue except for testis and placenta. Moreover, we found using immunohistochemistry SPESP1 re-expression in xenografts in BALB/c-nu/nu mice that received 5Aza treatment. To assess the antigenicity of SPESP1, we stimulated human CD4

Indexed as

AnimalsAntigens, NeoplasmCarrier ProteinsCell Line, TumorDecitabineDNA MethylationEpigenesis, GeneticEpitopes, T-LymphocyteHumansImmunotherapyMiceMice, Inbred BALB CMice, NudeNeoplasmsSeminal Plasma ProteinsT-Lymphocytes, Helper-InducerAntigens, NeoplasmCarrier ProteinsDecitabineEpitopes, T-LymphocyteSeminal Plasma ProteinsSPESP1 protein, humancancer immunoeditingcancer immunotherapyDNA methylationstealth antigenstumor immunoescape

Identifiers

PMID34009705
PMCPMC8253266
OpenAlexW3163923374

What OpenQuestion holds

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LicenceCC BY-NC
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.