{Reference Type}: Journal Article {Title}: Screening for the Key Proteins Associated with Rete Testis Invasion in Clinical Stage I Seminoma via Label-Free Quantitative Mass Spectrometry. {Author}: Borszéková Pulzová L;Roška J;Kalman M;Kliment J;Slávik P;Smolková B;Goffa E;Jurkovičová D;Kulcsár Ľ;Lešková K;Bujdák P;Mego M;Bhide MR;Plank L;Chovanec M; {Journal}: Cancers (Basel) {Volume}: 13 {Issue}: 21 {Year}: Nov 2021 8 {Factor}: 6.575 {DOI}: 10.3390/cancers13215573 {Abstract}: Rete testis invasion (RTI) is an unfavourable prognostic factor for the risk of relapse in clinical stage I (CS I) seminoma patients. Notably, no evidence of difference in the proteome of RTI-positive vs. -negative CS I seminomas has been reported yet. Here, a quantitative proteomic approach was used to investigate RTI-associated proteins. 64 proteins were differentially expressed in RTI-positive compared to -negative CS I seminomas. Of them, 14-3-3γ, ezrin, filamin A, Parkinsonism-associated deglycase 7 (PARK7), vimentin and vinculin, were validated in CS I seminoma patient cohort. As shown by multivariate analysis controlling for clinical confounders, PARK7 and filamin A expression lowered the risk of RTI, while 14-3-3γ expression increased it. Therefore, we suggest that in real clinical biopsy specimens, the expression level of these proteins may reflect prognosis in CS I seminoma patients.