ArticleJournal of gastrointestinal oncology2021
PD-L1 immunohistochemistry comparison of 22C3 and 28-8 assays for gastric cancer.
Article in Journal of gastrointestinal oncology, 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.
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.
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.
Who cites it
27 citing papers in PubMed, 1 synthesis or guideline pooled it, 31 citations in OpenAlex.
- Society for Immunotherapy of Cancer (SITC) clinical practice guideline on immunotherapy for the treatment of gastrointestinal cancer.Journal for immunotherapy of cancer · 2023Guideline
- Real-world characterization of PD-L1 expression in patients with advanced esophagogastric adenocarcinoma in Spain.Clinical & translational oncology : official publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico · 2026Observational
- Clinical Interchangeability of 22C3 and 28 - 8 PD-L1 assays for patient selection in esophageal squamous cell carcinoma.Virchows Archiv : an international journal of pathology · 2026Article
- PD-L1 expression and survival in unresectable/recurrent gastric cancer treated by 1st-line treatment without immune checkpoint inhibitors: JCOG1013A1.British journal of cancer · 2026Article
- Comprehensive Overview of Gastric Cancer Immunohistochemistry: Key Biomarkers, Advanced Detection Methods, and Perspectives.Medicina (Kaunas, Lithuania) · 2026Review
- "HER2-Low" and the Challenge of Repurposing Legacy HER2 IHC Biomarker Assays.Current oncology (Toronto, Ont.) · 2026Article
- PD-L1 Expression in Prostate Cancer: Anatomopathological Features, Methodological Pitfalls, and Therapeutic Potential.International journal of molecular sciences · 2026Review
- Immune checkpoint inhibitors in medulloblastoma: current updates in preclinical and clinical developments.Frontiers in oncology · 2026Review
- Article
- Clinical evaluation of a novel-developed clone 3E2 for the detection of PD-L1 expression status in lung adenocarcinoma.BMC cancer · 2025Article
- Biomarkers in gastroesophageal cancer 2025: an updated consensus statement by the Spanish Society of Medical Oncology (SEOM) and the Spanish Society of Pathology (SEAP).Clinical & translational oncology : official publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico · 2025Review
- Article
- Treatment Selection for Patients with HER2-Negative Metastatic Gastric Cancer Expressing Claudin 18.2 and PD-L1.Cancers · 2025Review
- PD-L1 as a Biomarker in Gastric Cancer Immunotherapy.Journal of gastric cancer · 2025Review
- Discordant PD-L1 results between 28-8 and 22C3 assays are associated with outcomes of gastric cancer patients treated with nivolumab plus chemotherapy.Gastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association · 2024Article
- Factors associated with the efficacy of first-line nivolumab plus chemotherapy in advanced gastric cancer patients with deficient mismatch repair.Gastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association · 2024Article
- Comparing Three Different Anti-Programmed Death-Ligand 1 Antibodies in Immunohistochemical Evaluation of Combined Chemoimmunotherapy Response in Patients With NSCLC: A Prospective Study.JTO clinical and research reports · 2024Article
- An oncogene regulating chromatin favors response to immunotherapy: Oncogene CHAF1A and immunotherapy outcomes.Oncoimmunology · 2024Article
- Biomarkers for Predicting Response to Personalized Immunotherapy in Gastric Cancer.Diagnostics (Basel, Switzerland) · 2023Review
- Novel Biomarkers of Gastric Cancer: Current Research and Future Perspectives.Journal of clinical medicine · 2023Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundNivolumab and pembrolizumab are promising therapies for gastric adenocarcinoma. The 22C3 and 28-8 pharmDx immunohistochemistry assays for programmed death ligand-1 scoring criteria have been developed. This study compared the programmed death ligand-1 staining patterns of gastric adenocarcinoma evaluated by the 22C3 and 28-8 pharmDx assays.
methodsTissue microarray analysis was performed for 226 patients with gastric adenocarcinoma who underwent curative surgery. Interobserver concordance between the 22C3 and 28-8 pharmDx assays was assessed to compare the dichotomized expression values. Programmed death ligand-1 positivity was assessed by combined positive score and tumor proportion score. Immunohistochemistry for deficient mismatch repair proteins and Epstein-Barr virus-encoded RNA
resultsProgrammed death ligand-1 positivity with a combined positive score ≥5 was detected in 63 patients (28%) by the 22C3 pharmDx assay, and in 45 patients (20%) by the 28-8 pharmDx assay. A pairwise comparison of the 22C3 and 28-8 pharmDx assays showed 87% of pairs were concordant and 11% higher expressions for the 22C3 pharmDx assay, with strong concordance (kappa score =0.881 with a combined positive score cutoff of 5). The programmed death ligand-1 positivity rate (range, 3-5%) of the tumor proportion score was markedly lower than that of the combined positive score in the two assays. Programmed death ligand-1 positivity of the combined positive score in these two assays was associated with mismatch repair proteins and Epstein-Barr virus status. There was no significant difference in the overall survival between programmed death ligand-1, mismatch repair proteins, and Epstein-Barr virus status.
conclusionsThe study findings suggest the potential interchangeability of the 22C3 and 28-8 pharmDx assays to determine programmed death ligand-1 expression levels in gastric adenocarcinoma patients.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
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.