Shubhrat Maheshwari, Aditya Singh, Amita Verma, Vaseem A. Ansari, Juber Akhtar, Bhupendra G. Prajapati2026-07-142026978-981-95-4125-6https://doi.org/10.1007/978-981-95-4126-3_6http://136.232.12.194:4000/handle/123456789/1936Multifunctional Marine Polysaccharides: Drug Delivery, Biomedicine and Food Technology Applications Editors: Sougata Jana, Subrata Jana, John F. KennedyThis chapter explores the potential of marine-based polysaccharides in nose-to-brain drug delivery systems, focusing on their applications for treating central nervous system (CNS) disorders. Marine polysaccharides, including alginates, chitosan, and carrageenans, offer unique advantages due to their natural biocompatibility, biodegradability, and ability to form gels with desirable mechanical properties for drug delivery. These polysaccharides exhibit excellent mucoadhesive properties, enhancing the sustained release and absorption of therapeutic agents through the nasal mucosa. They can effectively bypass the blood-brain barrier (BBB) via olfactory and trigeminal nerve pathways, providing a noninvasive alternative to traditional drug delivery methods. The chapter highlights various synthesis strategies for marine polysaccharide-based hydrogels, including chemical crosslinking and physical stimuli-responsive gelation, and discusses their combination with nanoparticles for enhanced drug release and targeting. In vitro and in vivo studies demonstrate the successful application of these systems in nose-to-brain (N2B) drug delivery, with improved drug retention, reduced side effects, and enhanced therapeutic effects. While challenges remain in improving mechanical strength and optimizing drug release profiles, marine polysaccharides offer great promise as drug carriers for CNS treatments. Further research and development are essential to realize their full potential for treating neurological diseases.en-USMarine polysaccharidesNose-to-brain drug deliveryAlginatesChitosanCarrageenansCentral nervous systemBlood-brain barrierDrug delivery systemsMucoadhesionNasal drug deliveryDrug releaseNanoparticlesBook chapter