Plant-Derived Exosome-Like Nanovesicles: Lipidomics, Brain Targeting, and Therapeutic Promise in Neurodegenerative Diseases

Plant derived extracellular vesicles sometimes called plant exosomes like nanovesicle (PELNs or PDNVs) are tiny packets released from plants. They are loaded with lipids, proteins, RNAs and metabolites, they do not just float around doing nothing. These vesicles help cells talk to each other and they can even affect how mammalian systems work.1 What’s really interesting is how this plant vesicles protect their cargo. They shield it from being broken down by enzyme, then sneak into mammalian cells through endocytosis or by fusing with the cell membrane. Once inside, they deliver lipids and mRNAs that can actually changes things like oxidative stress, neuroinflammation and the build-up of bad proteins.2 Take ginger-derived vesicles loaded with curcumin, for example, they show better bioavailability and stronger neuroprotective effects than giving curcumin on its own. There are more evidence keeps pilling up that these plant vesicles can cross major biological barriers, like the gut lining and sometimes even the blood brain barrier. The exact route they take and how efficiently they get across, so need more standardized lab studies to figure out. These vesicles ready for clinical use isn’t simple.3 We need large-scale reliable ways to isolate and purify them and detailed analysis. Techniques for loading drugs or other molecules into them need to be optimized and everything ha to meet strict safety and regulatory preclinical data, we are actually on realistic path toward using them in medicines. Still we need to focus on thing like figuring out right dose, understanding where they travel in the body and pinning down exactly how they work.4 Recent studies have taken a deep dive into lipids inside these vesicles’ things like phosphatidic acid, phosphatidylcholine and phosphatidylethanolamine and looked at how these molecules help stabilize the vesicles, help them target certain cells and aid in delivering drugs. The vesicles phospholipids rich bilayer and their stash of bioactive lipids make them promising natural carries for getting treatments into the brain and for controlling inflammation, oxidative stress and protein balance. This review pulls together what we know about the lipids composition of plant derived exosomes including galactolipids, phospholipids, sphingolipids the method used to isolate and analyse them, how their lipids might influences brain disease It covers how these vesicles cross the BBB modulate neuroinflammation and what preclinical studies in models of Alzheimer’s disease, Parkinson’s disease and other neurodegerative disease. Finally, we lay out experimental guidelines and future research directions to speed up the development of PDEV lipid- based therapies for neurodegenerative diseases.5