Phosphate Toxicity and Epithelial to Mesenchymal Transition

Area of Science:

• Cell Biology
• Pathophysiology
• Oncology

Background:

• Phosphate imbalance is implicated in metabolic, skeletal, cardiac, kidney diseases, and cancers.
• Elevated phosphate levels can induce epithelial to mesenchymal transition (EMT), a process linked to cell death, metastasis, and fibrosis.
• EMT is regulated by signaling pathways like TGF-β, RTK, SRC, Wnt, and Notch, but their cross-talk is not fully understood.

Purpose of the Study:

• To investigate the role of elevated phosphate levels in inducing EMT and cell death.
• To elucidate the signaling pathways involved in phosphate-induced EMT, focusing on cross-talk.
• To propose excess phosphate-mediated lethal EMT as a mechanism underlying phosphate-associated pathologies.

Main Methods:

• Review of existing literature on EMT and phosphate toxicity.
• Analysis of signaling pathways regulating EMT.
• Contextualization of lethal EMT within phosphate toxicity.

Main Results:

• Elevated phosphate levels were shown to enhance EMT partially via ERK1/2 pathway activation.
• This phosphate-induced EMT leads to massive cell death.
• Lethal EMT is proposed as a key mechanism in phosphate-induced cytotoxicity.

Conclusions:

• Excess phosphate can induce a lethal form of EMT, contributing to cytotoxicity.
• This mechanism may explain phosphate-associated renal fibrosis and cancer metastasis.
• Understanding phosphate-mediated EMT offers insights into treating related diseases.