Evidence map›Paper›PMID 33596250›Full record

ArticlePloS one2021

Developing an enhanced 7-color multiplex IHC protocol to dissect immune infiltration in human cancers.

Zhaoyu Sun, Richard Nyberg, Yaping Wu, Brady Bernard, William L Redmond

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed, 1 pooled it
2.5field-weighted citation impact, top 8% 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

27 citing papers in PubMed, 1 synthesis or guideline pooled it, 37 citations in OpenAlex.

  1. Pooled it
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  10. Cutaneous melanoma.Nature reviews. Disease primers · 2025
    Review
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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

5 authors at 2 institutions in 1 country.

Zhaoyu SunEarle A. Chiles Research Institute, Providence Cancer Institute, Portland, OR, United States of America.
Richard NybergEarle A. Chiles Research Institute, Providence Cancer Institute, Portland, OR, United States of America.
Yaping WuDepartment of Pathology, Providence Health and Services, Portland, OR, United States of America.
Brady BernardEarle A. Chiles Research Institute, Providence Cancer Institute, Portland, OR, United States of America.
William L RedmondEarle A. Chiles Research Institute, Providence Cancer Institute, Portland, OR, United States of America.ORCID 0000-0002-2572-1731
Providence Portland Medical Center · USProvidence Health & Services · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The TSA Opal multiplex immunohistochemistry (mIHC) protocol (PerkinElmer) has been used to characterize immune infiltration in human cancers. This technique allows multiple biomarkers to be simultaneously stained in a single tissue section, which helps to elucidate the spatial relationship among individual cell types. We developed and optimized two improved mIHC protocols for a 7-color panel containing 6 biomarkers (CD3, CD8, CD163, PD-L1, FoxP3, and cytokeratin (CK)) and DAPI. The only difference between these two protocols was the staining sequence of those 6 biomarkers as the first sequence is PD-L1/CD163/CD8/CK/CD3/FoxP3/DAPI and the second sequence is FoxP3/CD163/CD8/CK/CD3/PD-L1/DAPI. By comparing PD-L1/FoxP3 staining in mIHC and singleplex PD-L1/FoxP3 staining on the adjacent slide, we demonstrated that the staining sequence does not affect the staining intensity of individual biomarkers as long as a proper antigen retrieval method was used. Our study suggests that use of an antigen retrieval buffer with higher pH value (such as Tris-EDTA pH9.0) than that of the stripping buffers (such as citrate buffer pH6.0) is helpful when using this advanced mIHC method to develop panels with multiple biomarkers. Otherwise, individual biomarkers may exhibit different intensities when the staining sequence is changed. By using this protocol, we characterized immune infiltration and PD-L1 expression in head and neck squamous cell carcinoma (HNSCC), breast cancer (BCa), and non-small cell lung cancer (NSCLC) specimens. We observed a statistically significant increase in CD3+ cell populations within the stroma of NSCLC as compared to BCa and increased PD-L1+ tumor cells in HNSCC as opposed to BCa.

Indexed as

Antigens, CDAntigens, Differentiation, MyelomonocyticB7-H1 AntigenBiomarkers, TumorBreast NeoplasmsCarcinoma, Non-Small-Cell LungCD163 AntigenCD3 ComplexCD8 AntigensFemaleForkhead Transcription FactorsHead and Neck NeoplasmsHumansImmunohistochemistryIndolesKeratinsAntigens, CDAntigens, Differentiation, MyelomonocyticB7-H1 AntigenBiomarkers, TumorCD163 AntigenCD274 protein, humanCD3 ComplexCD8 AntigensDAPIForkhead Transcription FactorsFOXP3 protein, humanIndolesKeratinsReceptors, Cell Surface

Identifiers

PMID33596250
PMCPMC7888634
OpenAlexW3130329048

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.