PGF

PGF Full Name

placental growth factor

PGF Introduction

For researchers and clinicians working in maternal health, oncology, or vascular biology, placental growth factor (PGF, also known as PlGF) has become an increasingly important biomarker and therapeutic target because it sits at the intersection of angiogenesis, inflammation, and tissue remodeling. PGF belongs to the vascular endothelial growth factor (VEGF) family and is encoded by the PGF gene located on chromosome 14q24.3. As a glycosylated dimeric protein, PGF exists in several splice isoforms, with PGF-1 and PGF-2 being the most abundant during pregnancy. Unlike VEGF-A, PGF preferentially binds VEGFR-1 (FLT1) and can also interact with neuropilin receptors, giving it distinct signaling properties in endothelial cells, trophoblasts, immune cells, and neural tissues. In healthy physiology, PGF supports blood vessel formation, promotes trophoblast invasion into maternal decidua, and enhances vascular adaptation during placental development. Because abnormal angiogenesis is a major challenge in both pregnancy complications and tumor progression, PGF has attracted substantial interest as a diagnostic indicator and intervention target across multiple disease areas.

One of the most clinically significant aspects of PGF biology is its central role in placental vascular development and pregnancy maintenance. PGF expression is normally low during early gestation, rises significantly after the first trimester, peaks around the third trimester, and gradually declines before delivery. This tightly regulated expression pattern is essential for establishing a functional maternal-fetal circulation. Reduced circulating PGF levels are strongly associated with placental insufficiency, preeclampsia, fetal growth restriction, and other hypertensive disorders of pregnancy, making PGF testing increasingly valuable in prenatal risk assessment and early diagnosis. From a mechanistic perspective, PGF promotes trophoblast proliferation, limits apoptosis, and supports spiral artery remodeling through VEGFR-1–mediated signaling pathways. Its activity is further influenced by hypoxia-inducible factor-1 (HIF-1), oxidative stress, inflammatory cytokines, and local oxygen tension within the placenta. When the balance between pro-angiogenic factors such as PGF and anti-angiogenic mediators becomes disrupted, placental vascularization may remain shallow or incomplete, contributing to maternal endothelial dysfunction and adverse pregnancy outcomes. This explains why PGF has emerged not only as a biomarker for obstetric monitoring, but also as a promising target for understanding the molecular basis of pregnancy-related vascular disease.

Beyond reproductive biology, PGF is increasingly recognized for its involvement in cancer progression, chronic inflammation, ischemic injury, and neurovascular remodeling. In oncology research, elevated PGF expression has been linked to tumor angiogenesis, metastasis, immune microenvironment modulation, and resistance to anti-VEGF therapies. Recent studies in pancreatic cancer further suggest that PGF may function as a neurotrophic and nerve-guidance factor, promoting neural invasion through VEGFR1- and neuropilin-dependent signaling in neurons and Schwann cells. These findings are particularly important because perineural invasion is associated with severe pain, aggressive disease progression, and poor prognosis in multiple solid tumors. In cardiovascular and ischemic diseases, PGF can stimulate compensatory angiogenesis in damaged tissues, although persistent overactivation may also contribute to pathological vascular remodeling. Because PGF participates in both protective repair mechanisms and disease-driving angiogenic pathways, researchers continue to investigate PGF-targeted therapeutics, antibody strategies, and combination anti-angiogenic approaches. As interest grows in precision medicine, PGF is becoming an increasingly valuable molecular target for biomarker development, disease stratification, and next-generation vascular therapy research.

Alternate Names for PGF

PGF; placental growth factor; PGFL; PLGF; PlGF-2; D12S1900; SHGC-10760; placenta growth factor; placental growth factor; vascular endothelial growth factor-related protein; anti-PLGF

• 1.Creswell L, et al.; Perspectives on the Use of Placental Growth Factor (PlGF) in the Prediction and Diagnosis of Pre-Eclampsia: Recent Insights and Future Steps. Int J Womens Health. 2023, 15:255-271.
  2.Vornic I, et al.; The Interplay of Molecular Factors and Morphology in Human Placental Development and Implantation. Biomedicines. 2024, 12(12):2908.