Haemostatic Gene Expression in Cancer-Related Immunothrombosis: Contribution for Venous Thromboembolism and Ovarian Tumour Behaviour.

Simple Summary: The exploration of prognostic biomarkers in ovarian cancer (OC) persists due to the daunting challenge of therapy resistance and poor patient outcomes. Dysregulated components of haemostasis are recognized as pivotal players in OC pathogenesis, contributing to tumour growth, metastasis, and the onset of cancer-associated thrombosis (CAT). Drawing upon the concept of immunothrombosis, which elucidates the intricate crosstalk among immune cells, platelets, and endothelial cells, this study investigated the expression of haemostasis-related genes in peripheral blood entities (particularly platelets and immune cells). The aim was to uncover prognostic markers, potential therapeutic targets for cancer management, and CAT predictors. Lower pre-chemotherapy F3 and F8 expression levels were significantly associated with increased CAT susceptibility post tumour diagnosis. The latter was also associated with shorter progression-free and overall survival. These findings point out the prognostic potential of these genes in OC in the context of immunothrombosis. Validation in larger cohorts is essential for clinical translation. Ovarian cancer (OC) is the deadliest gynaecological malignancy. Identifying new prognostic biomarkers is an important research field. Haemostatic components together with leukocytes can drive cancer progression while increasing the susceptibility to venous thromboembolism (VTE) through immunothrombosis. Unravelling the underlying complex interactions offers the prospect of uncovering relevant OC prognostic biomarkers, predictors of cancer-associated thrombosis (CAT), and even potential targets for cancer therapy. Thus, this study evaluated the expression of F3, F5, F8, F13A1, TFPI1, and THBD in peripheral blood cells (PBCs) of 52 OC patients. Those with VTE after tumour diagnosis had a worse overall survival (OS) compared to their counterparts (mean OS of 13.8 ± 4.1 months and 47.9 ± 5.7 months, respectively; log-rank test, p = 0.001). Low pre-chemotherapy F3 and F8 expression levels were associated with a higher susceptibility for OC-related VTE after tumour diagnosis (χ2, p < 0.05). Regardless of thrombogenesis, patients with low baseline F8 expression had a shorter progression-free survival (PFS) than their counterparts (adjusted hazard ratio (aHR) = 2.54; p = 0.021). Among those who were not under platelet anti-aggregation therapy, low F8 levels were also associated with a shorter OS (aHR = 6.16; p = 0.006). Moving forward, efforts should focus on external validation in larger cohorts. [ABSTRACT FROM AUTHOR]