Tamimi, F. (Faris)

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    Prognostic value of human leukocyte antigen G expression in solid tumors: a systematic review and meta-analysis
    (2023) Perez-Segura, P. (Pedro); Ocaña, A. (Alberto); Benítez-Fuentes, J.D. (Javier David); Mittal, A. (Abhenil); Amir, E. (Eitan); Fernández-Hinojal, G. (Gonzalo); Molto, C. (Consolación); Bartolome, J. (Javier); Manzano, A. (Aranzazu); Tamimi, F. (Faris)
    Introduction Identification of modulators of the immune response with inhibitory properties that could be susceptible for therapeutic intervention is a key goal in cancer research. An example is the human leukocyte antigen G (HLA-G), a nonclassical major histocompatibility complex (MHC) class I molecule, involved in cancer progression.Methods In this article we performed a systematic review and meta-analysis on the association between HLA-G expression and outcome in solid tumors. This study was performed in accordance with PRISMA guidelines and registered in PROSPERO.Results A total of 25 studies met the inclusion criteria. These studies comprised data from 4871 patients reporting overall survival (OS), and 961 patients, reporting disease free survival (DFS). HLA-G expression was associated with worse OS (HR 2.09, 95% CI = 1.67 to 2.63; P < .001), that was higher in gastric (HR = 3.40; 95% CI = 1.64 to 7.03), pancreatic (HR = 1.72; 95% CI = 0.79 to 3.74) and colorectal (HR = 1.55; 95% CI = 1.16 to 2.07) cancer. No significant differences were observed between the most commonly utilized antibody (4H84) and other methods of detection. HLA-G expression was associated with DFS which approached but did not meet statistical significance.Discussion In summary, we describe the first meta-analysis associating HLA-G expression and worse survival in a variety of solid tumors.