# DMPC-Based Liposomal Vesicles for Encapsulation and Controlled Release of NMN and Matrigel in Sarcopenia Therapy

## TL;DR

This study explores DMPC-based liposomes to deliver NMN and Matrigel for treating sarcopenia, showing improved muscle cell protection and function.

## Contribution

A novel DMPC-based liposomal formulation co-encapsulating NMN and Matrigel is developed for sarcopenia therapy.

## Key findings

- DMPC vesicles with NMN and Matrigel reduced oxidative damage and preserved mitochondrial function in sarcopenia models.
- Combining NMN and Matrigel in the formulation showed superior protective effects compared to individual components.
- The liposomal delivery system demonstrated potential for stabilizing cytoskeletal integrity and enhancing muscle resilience.

## Abstract

Accurate diagnosis of diseases in patients is crucial, particularly in older individuals, where the focus is often placed primarily on advanced age and its associated symptoms. However, advancements in technology and research have revealed that certain diseases traditionally linked to aging can also manifest in younger populations, demonstrating similar bodily changes. One such condition is sarcopenia, a degenerative disease of skeletal muscle that arises from various pathological processes affecting the tissues. In this study, we developed a liposomal formulation based on 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC), in which both nicotinamide mononucleotide (NMN) and Matrigel (Mgel) were co-encapsulated, each playing a distinct role in the management of sarcopenia. NMN is known to stimulate the increase of NAD+ levels, while Matrigel enhances the activity of satellite cells, thereby facilitating muscle fiber regeneration and stabilizing protein levels. Results from the DLS, SEM, and TEM analyses revealed significant differences attributed to the type of therapeutic agent used and the synthesis parameters. Additionally, the drug release profile underscored the complementary nature and significance of selecting the appropriate active substances for effective treatment strategies. The in vitro investigations aimed to assess the potential of DMPC lipid vesicles loaded with NMN, either alone or in combination with Matrigel, to counteract sarcopenia-associated oxidative stress and mitochondrial dysfunction. The results showed that both NMN-based formulations reduced oxidative damage, preserved mitochondrial function, and maintained cytoskeletal integrity in a hydrogen peroxide-induced model of sarcopenia. Importantly, the formulation containing both NMN and Matrigel demonstrated superior protective effects, suggesting a synergistic role of the extracellular matrix components in enhancing muscle cell resilience. These findings support the use of DMPC-based delivery systems as promising candidates for sarcopenia therapy and warrant further investigation into their mechanisms of action in preventing muscle cell degeneration.