Foxd2, belonging to the Forkhead-box (FOX) gene family, is likely involved in a range of biological processes. Although the provided references mainly focus on FOXD2-AS1, a long non-coding RNA, it's worth noting that genes in the FOX family are associated with various functions, and deregulation can lead to congenital disorders, diabetes, or carcinogenesis [7].

Most of the references center on FOXD2-AS1 rather than Foxd2 itself. FOXD2-AS1 is up-regulated in almost all types of malignancies and impacts multiple pathways such as PI3K/AKT, AKT/mTOR, Hippo/YAP, Notch, Nrf2, Wnt/β-catenin, NF-κB, and ERK/MAPK. It enhances cancer stem cell properties, prompts epithelial-mesenchymal transition, and induces resistance to many anticancer agents [1]. In various cancers like gastric, lung, bladder, etc., its up-regulation contributes to cancer cell proliferation, migration, and invasion, and is related to patient survival and prognosis [2,3]. In glioma, it stimulates progression by inhibiting P53 [4]. In esophageal squamous cell carcinoma, it acts as an oncogene by sponging miR-204-3p [5]. In lung adenocarcinoma, it increases proliferation and invasion via cell-cycle regulation [6]. In retinoblastoma, it promotes cell viability and migration by sponging miR-31 [8]. In hepatocellular carcinoma, it facilitates progression by regulating TWIST1 [9]. In osteoarthritis, it induces chondrocyte proliferation by sponging miR-27a-3p [10].

In conclusion, while direct functional studies on Foxd2 from the provided references are scarce, the associated lncRNA FOXD2-AS1 clearly plays significant roles in cancer progression and other disease conditions. Understanding the functions of Foxd2 and its related molecules like FOXD2-AS1 is crucial for uncovering disease mechanisms and developing potential therapeutic strategies.