Phospholipase A2 receptor is associated with hypercoagulable status in membranous nephropathy: a narrative review

Xu Lu1, Chao Kan1, Rui Zhang2

  • 1Department of Clinical Medicine, Changchun University of Chinese Medicine, Changchun, China.

Abstract

Insights

Membranous nephropathy patients face high thrombotic risks. Secretory phospholipase A2 (sPLA2) and arachidonic acid (AA) may link phospholipase A2 receptor (PLA2R) to hypercoagulability in PLA2R-related MN.

Area of Science:

  • Nephrology
  • Immunology
  • Hematology

Background:

  • Membranous nephropathy (MN) is a leading cause of thrombotic events in nephrotic syndrome (NS).
  • The precise mechanisms linking MN to thrombosis remain incompletely understood.
  • Elevated phospholipase A2 receptor (PLA2R) antibodies correlate with proteinuria and reduced remission rates in PLA2R-associated MN, factors also associated with thrombotic risk.

Purpose of the Study:

  • To elucidate the relationship between PLA2R and hypercoagulability in MN patients.
  • To explore the potential roles of secretory phospholipase A2 (sPLA2) and arachidonic acid (AA) in regulating blood lipids and coagulation in PLA2R-positive MN.

Main Methods:

  • Literature retrieval from China National Knowledge Infrastructure (CNKI) and PubMed.
  • Systematic review and classification of retrieved abstract and introduction information.
  • Summarization of key findings to formulate a novel theoretical standpoint.

Main Results:

  • Discussed the involvement of PLA2R antibodies and sPLA2 in MN-related hypercoagulability.
  • Analyzed four proposed mechanisms: sPLA2-PLA2R binding inducing podocyte apoptosis, sPLA2 promoting anti-PLA2R antibody production, sPLA2 mediating AA release, and AA-induced platelet aggregation.

Conclusions:

  • PLA2R may contribute to the exacerbation of hypercoagulability in PLA2R-related MN.
  • Secretory phospholipase A2 (sPLA2) appears to play a significant role in this pro-thrombotic process.

Related Concept Videos

Phosphoinositides and PIPs01:42

Phosphoinositides and PIPs

Phosphoinositides are a group of phospholipids containing a glycerol backbone with two fatty acid chains and a phosphate attached to a myoinositol sugar ring. The inositol head group extends into the cytoplasm, where it is modified by adding phosphate groups to form phosphatidylinositol phosphates or PIPs.
Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
8.7K
Nephrotic Syndrome I : Introduction01:24

Nephrotic Syndrome I : Introduction

Nephrotic Syndrome is a chronic kidney disorder defined by clinical findings such as severe proteinuria, hypoalbuminemia, hyperlipidemia, and edema. These symptoms result from damage to the glomeruli, the kidney’s filtering units, increasing their permeability to proteins.Definition and Meaning:Proteinuria, defined as the loss of more than 3.5 grams of protein per day in adults, is a crucial feature of nephrotic syndrome. This condition is often accompanied by edema, the accumulation of...
21
IP3/DAG Signaling Pathway01:11

IP3/DAG Signaling Pathway

Membrane lipids such as phosphatidylinositol (PI) are precursors for several membrane-bound and soluble second messengers. Specific kinases phosphorylate PI and produce phosphorylated inositol phospholipids. One such inositol phospholipids are the  phosphatidylinositol-4,5 bisphosphate [PI(4,5)P2], present in the inner half of the lipid bilayer. Upon ligand binding, GPCR stimulates Gq proteins to turn on phospholipase Cꞵ. Activated phospholipase Cꞵ cleaves PI(4,5)P2 and...
12.3K
Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

Anticoagulant Drugs: Low-Molecular-Weight Heparins

Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
857
Transducer Mechanism: Enzyme-Linked Receptors01:27

Transducer Mechanism: Enzyme-Linked Receptors

Enzyme-linked receptors are cell-surface receptors acting as an enzyme or associating with an enzyme intracellularly. They make excellent drug targets. Drugs can bind to the extracellular ligand-binding domain or directly affect their enzymatic domain and alter their activity.
Major types that are helpful drug targets include:
2.7K
Amplifying Signals via Enzymatic Cascade01:22

Amplifying Signals via Enzymatic Cascade

When a ligand binds to a cell-surface receptor, the receptor's intracellular domain changes shape, which may either activate its enzyme function or allow its binding to other molecules. The initial signal is amplified by most signal transduction pathways. This means that a single ligand molecule can activate multiple molecules of a downstream target. Proteins that relay a signal are most commonly phosphorylated at one or more sites, activating or inactivating the protein. Kinases catalyze...
8.7K