Cancer testis antigens in myelodysplastic syndromes revisited: a targeted RNA-seq approach

OncoImmunology

Victor Beltrán¹  Joaquín Panadero²  Inés Calabria²  Manuel Muro³  Begoña Muiña⁴  María Zurdo⁵  Rosa Cifuentes⁵  Ana María Hurtado López⁵  MariLuz Amigo⁵  Raúl Teruel⁵  Salvador Carrillo-Tornel⁵  Andrés Jerez⁵  Vicente Vicente⁵  Tzu Hua Chen-Liang⁵  Noelia Navarro-Villamor⁶  Ana Isabel Antón⁶  Eduardo José Salido⁷ 

[1] H Virgen Del Castillo;Health Research Institute La Fe;Hospital Clínico Universitario Virgen De La Arrixaca;Hospital Rafael Méndez;Hospital Universitario Morales Meseguer, IMIB;IMIB-Arrixaca;Virgen De La Arrixaca University Hospital;

关键词: cancer testis antigens;    azacitidine;    myelodysplastic syndromes;    t-cell response;   

DOI  :  10.1080/2162402X.2020.1824642

来源: DOAJ

【 摘 要 】

Cancer-Testis antigens (CTA) are named after the tissues where they are mainly expressed: in germinal and in cancer cells, a process that mimics many gametogenesis features. Mapping accurately the CTA gene expression signature in myelodysplastic syndromes (MDS) and chronic myelomonocytic leukemia (CMML) is a prerequisite for downstream immune target-discovery projects. In this study, we take advantage of the use of azacitidine to treat high-risk MDS and CMML to draw the CTAs landscape, before and after treatment, using an ad hoc targeted RNA sequencing (RNA-seq) design for this group of low transcript genes. In 19 patients, 196 CTAs were detected at baseline. Azacitidine did not change the number of CTAs expressed, but it significantly increased or decreased expression in nine and five CTAs, respectively. TFDP3 and DDX53, emerged as the main candidates for immunotherapeutic targeting, as they showed three main features: i) a significant derepression on day +28 of cycle one in those patients who achieved complete remission with hypomethylating treatment (FC = 6, p = .008; FC = 2.1, p = .008, respectively), ii) similar dynamics at the protein level to what was observed at the RNA layer, and iii) to elicit significant specific cytotoxic immune responses detected by TFDP3 and DDX53 HLA-A*0201 tetramers. Our study addresses the unmet landscape of CTAs expression in MDS and CMML and revealed a previously unrecognized TFDP3 and DDX53 reactivation, detectable in plasma and able to elicit a specific immune response after one cycle of azacitidine.

【 授权许可】

Unknown