• 1. Department of Thyroid Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, P. R. China;
  • 2. Engineering Research Center of Multidisciplinary Diagnosis and Treatment of Thyroid Cancer of Henan Province, Zhengzhou 450052, P. R. China;
  • 3. Key Medicine Laboratory of Thyroid Cancer of Henan Province, Zhengzhou 450052, P. R. China;
YIN Detao, Email: detaoyin@zzu.edu.cn
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Objective  To analyze the immune landscape and gene expression patterns associated with CD8+T-cell subtypes in papillary thyroid carcinoma by using bioinformatics, construct a prognostic model, and performe analyses of immune infiltration characteristics. Methods We integrated single-cell RNA sequencing and Bulk transcriptomic data, using differential expression analysis, cell differentiation trajectory analysis, consensus clustering, and LASSO-Cox proportional hazards regression to identify CD8+T-cell subtype-associated prognostic genes. Then we developed and evaluated a risk-score prognostic model and used it to analyze immune infiltration and predict responses to immunotherapy. Results We classified tumor-infiltrating CD8+T-cells in papillary thyroid carcinoma into six subtypes, identified nine prognostic genes (LAIR2, RGS2, DEDD2, HSPA6, KLRB1, DNAJB1, CCL5, CX3CR1, and MT1M), and constructed a prognostic model. Receiver operating characteristic (ROC) curves for the training, validation, and combined cohorts demonstrated that the model had good predictive performance for 3-, 5-, and 10-year overall survival in patients with papillary thyroid carcinoma. Patients in the high-risk group had significantly shorter overall survival than those in the low-risk group (P=0.021) and exhibited lower levels of immune cell infiltration, while the low-risk group showed a higher response rate to immunotherapy (P=0.04). Conclusion This prognostic model can effectively predict the prognosis, immune infiltration characteristics, and response to immunotherapy in patients with papillary thyroid carcinoma, providing a theoretical basis for clinical prognostic assessment and the development of personalized treatment strategies.

Citation: LIU Weihao, SUN Yuxiao, ZHANG Yifei, YIN Detao. CD8+T cell subtype-related genes predict prognosis and immune infiltration in papillary thyroid carcinoma: based on bioinformatics analysis. CHINESE JOURNAL OF BASES AND CLINICS IN GENERAL SURGERY, 2025, 32(10): 1229-1241. doi: 10.7507/1007-9424.202506070 Copy

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