RESUMEN
NP105-113-B*07:02-specific CD8+ T cell responses are considered among the most dominant in SARS-CoV-2-infected individuals. We found strong association of this response with mild disease. Analysis of NP105-113-B*07:02-specific T cell clones and single-cell sequencing were performed concurrently, with functional avidity and antiviral efficacy assessed using an in vitro SARS-CoV-2 infection system, and were correlated with T cell receptor usage, transcriptome signature and disease severity (acute n = 77, convalescent n = 52). We demonstrated a beneficial association of NP105-113-B*07:02-specific T cells in COVID-19 disease progression, linked with expansion of T cell precursors, high functional avidity and antiviral effector function. Broad immune memory pools were narrowed postinfection but NP105-113-B*07:02-specific T cells were maintained 6 months after infection with preserved antiviral efficacy to the SARS-CoV-2 Victoria strain, as well as Alpha, Beta, Gamma and Delta variants. Our data show that NP105-113-B*07:02-specific T cell responses associate with mild disease and high antiviral efficacy, pointing to inclusion for future vaccine design.
Asunto(s)
Antígeno HLA-B7/inmunología , Epítopos Inmunodominantes/inmunología , Proteínas de la Nucleocápside/inmunología , SARS-CoV-2/inmunología , Linfocitos T Citotóxicos/inmunología , Anciano , Secuencia de Aminoácidos , Anticuerpos Antivirales/inmunología , Afinidad de Anticuerpos/inmunología , COVID-19/inmunología , COVID-19/patología , Línea Celular Transformada , Femenino , Perfilación de la Expresión Génica , Humanos , Memoria Inmunológica/inmunología , Masculino , Persona de Mediana Edad , Receptores de Antígenos de Linfocitos T/inmunología , Índice de Severidad de la Enfermedad , Virus Vaccinia/genética , Virus Vaccinia/inmunología , Virus Vaccinia/metabolismoRESUMEN
Recurrent malignant solid pseudopapillary neoplasms of the pancreas (SPNP) are rare tumors with unpredictable clinical and histopathological features. There is a lack of consensus regarding utilization of adjuvant modalities in conjunction with or in lieu of curative metastatectomy. We present a remarkable case where Yttrium-90 selective internal radiation therapy (Y-90 SIRT) was successfully utilized to elucidate underlying tumor biology and aid resection of a large multifocal recurrent metastatic SPNP in the right hemi-liver of a 59-year-old female. Thus, in cases where curative metastatectomy remains the treatment goal in management of recurrent and/or metastatic SPNPs, Y-90 SIRT is a safe and effective adjunct treatment to facilitate curative resection.