HB-EGF-loaded nanovesicles enhance trophectodermal spheroid attachment and invasion

Area of Science:

• Reproductive Biology
• Cell Biology
• Biotechnology

Background:

• Embryo implantation requires trophectodermal cell attachment and invasion of the endometrium.
• Extracellular vesicles (EVs) mediate embryo-maternal communication but face challenges in yield and loading.
• Cell-derived nanovesicles (NVs) from human trophectodermal cells (hTSCs) can reprogram endometrial cells.

Purpose of the Study:

• To develop a rapid loading strategy for NVs with implantation molecules.
• To investigate the effects of HB-EGF loaded NVs (NV^HBEGF) on endometrial cells.
• To assess the potential of NV^HBEGF in enhancing embryo-maternal interactions.

Main Methods:

• Rapid loading of nanovesicles (NVs) with HB-EGF to create NV^HBEGF.
• Analysis of EGFR-mediated signaling in recipient endometrial cells (kinase phosphorylation, downstream pathways).
• Phosphoproteomics and proteomics to study short-term and long-term cellular responses.

Main Results:

• NV^HBEGF activated specific kinase phosphorylation sites (AKT, MAPK1) and modulated signaling pathways.
• Enhanced endometrial cell attachment and invasion by trophectodermal cells.
• Demonstrated short-term signaling patterns and long-term reprogramming of endometrial cells.

Conclusions:

• Engineered nanovesicles (NVs) can be effectively loaded with therapeutic molecules like HB-EGF.
• NV^HBEGF enhances endometrial receptivity and trophectodermal-endometrial interactions.
• This approach shows feasibility for improving nanovesicle-based therapies for embryo implantation.