Prognostic and Predictive Significance of B7-H3 and CD155 Expression in Gastric Cancer Patients

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dc.contributor.authorDalda, Ozlem
dc.contributor.authorBozdag, Zehra
dc.contributor.authorAkbulut, Sami
dc.contributor.authorGokce, Hasan
dc.contributor.authorDalda, Yasin
dc.contributor.authorAkatli, Ayse Nur
dc.contributor.authorHuz, Mustafa
dc.date.accessioned2026-04-04T13:31:09Z
dc.date.available2026-04-04T13:31:09Z
dc.date.issued2025
dc.departmentİnönü Üniversitesi
dc.description.abstractBackground/Objectives: This study aimed to characterize the expression patterns of B7 homolog 3 (B7-H3) and cluster of differentiation 155 (CD155), two immune-related transmembrane glycoproteins, in resectable gastric adenocarcinoma and to elucidate their clinicopathological, prognostic, and molecular implications. Methods: The study included 112 patients who underwent gastrectomy for gastric adenocarcinoma between 2020 and 2025, along with 30 samples of normal gastric tissue obtained from sleeve gastrectomy specimens. Histological subtype, grade of differentiation, TNM stage, and invasion parameters were re-evaluated. Immunohistochemical expression of B7-H3 and CD155 was quantified for membranous, stromal and membranous/cytoplasmic staining patterns. Quantitative reverse transcription polymerase chain reaction (RT-PCR) was performed on 29 tumor and 25 normal samples to confirm mRNA expression levels, with fold change >= 2 considered biologically significant upregulation and <= 0.5 considered downregulation. Machine learning models were developed to predict metastasis and mortality based on clinical and immunohistochemical features. Results: 78.5% of tumors were at an advanced stage (T3-T4), and metastasis was present in 22.3% of patients. Perineural invasion (PNI) and lymphovascular invasion (LVI) were observed in 67.9% and 88.4% of cases, respectively. Increased B7-H3 and CD155 expression were significantly associated with advanced tumor stage, metastasis, and the presence of PNI and LVI (all p < 0.05). In metastatic tumors, median membranous B7-H3, stromal B7-H3, and CD155 scores were 60, 130, and 190, respectively, compared with 20, 90, and 120 in non-metastatic tumors. A significant positive correlation was found between stromal B7-H3 and CD155 expression (r = 0.384, p < 0.001), indicating parallel upregulation. Quantitative RT-PCR confirmed significant overexpression of both genes in tumor tissues relative to normal controls. B7-H3 was upregulated in 75.9% and CD155 in 58.6% of samples, with co-upregulation in 55.2%. Fold-change levels were markedly higher in metastatic versus non-metastatic cases (B7-H3: 7.69-fold vs. 3.04-fold; CD155: 7.44-fold vs. 1.79-fold). ML analysis using the XGBoost model achieved 91.1% accuracy for metastasis prediction (F1-score 0.800). Key variables included pathological T4b stage, perineural invasion, N3b status, T4a stage, and CD155 score. The mortality model yielded 86.7% accuracy (F1-score 0.864), with metastasis, differentiation status, nodal involvement, age, lymph node ratio, and perineural invasion emerging as principal predictors. Conclusions: Combined evaluation of B7-H3 and CD155, supported by immunohistochemical staining and RT-PCR quantification of B7-H3 and CD155 mRNA expression levels, provides meaningful prognostic insights and supports their potential as dual molecular biomarkers for aggressive gastric adenocarcinoma phenotypes.
dc.description.sponsorshipInonu University Scientific Research Projects Coordination Unit [TTU-2024-3753]
dc.description.sponsorshipThis research was funded by Inonu University Scientific Research Projects Coordination Unit, grant number TTU-2024-3753.
dc.identifier.doi10.3390/diagnostics15212695
dc.identifier.issn2075-4418
dc.identifier.issue21
dc.identifier.orcid0000-0002-0701-8399
dc.identifier.orcid0000-0002-6864-7711
dc.identifier.orcid0000-0002-7538-3507
dc.identifier.pmid41225987
dc.identifier.scopus2-s2.0-105021432041
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.3390/diagnostics15212695
dc.identifier.urihttps://hdl.handle.net/11616/108610
dc.identifier.volume15
dc.identifier.wosWOS:001615376700001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherMdpi
dc.relation.ispartofDiagnostics
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WOS_20250329
dc.subjectgastric adenocarcinoma
dc.subjectB7-H3 stain
dc.subjectCD155 stain
dc.subjectRT-PCR
dc.subjectprognostic biomarker
dc.subjectmetastasis
dc.subjectlymphovascular invasion
dc.subjectperineural invasion
dc.titlePrognostic and Predictive Significance of B7-H3 and CD155 Expression in Gastric Cancer Patients
dc.typeArticle

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