Title:Stem Cells Derived from Human Exfoliated Deciduous Teeth (SHED) in Neuronal Disorders: A Review
Volume: 16
Issue: 5
Author(s): Minu Anoop and Indrani Datta*
Affiliation:
- Department of Biophysics, National Institute of Mental Health and Neurosciences, Institute of National Importance, Bengaluru, Karnataka,India
Keywords:
Mesenchymal stem cells, dental pulp stem cells, SHED, secretome, exosome, Parkinson's disease.
Abstract: Most conventional treatments for neurodegenerative diseases fail due to their focus on
neuroprotection rather than neurorestoration. Stem cell-based therapies are becoming a potential
treatment option for neurodegenerative diseases as they can home in, engraft, differentiate and produce
factors for CNS recovery. Stem cells derived from human dental pulp tissue differ from other
sources of mesenchymal stem cells due to their embryonic neural crest origin and neurotrophic
property. These include both Dental Pulp Stem Cells (DPSCs) from dental pulp tissues of human
permanent teeth and Stem cells from Human Exfoliated Deciduous teeth (SHED). SHED offers
many advantages over other types of MSCs, such as good proliferative potential, minimal invasive
procurement, neuronal differentiation and neurotrophic capacity, and negligible ethical concerns.
The therapeutic potential of SHED is attributed to the paracrine action of extracellularly released secreted
factors, specifically the secretome, of which exosomes are a key component. SHED and its
conditioned media can be effective in neurodegeneration through multiple mechanisms, including
cell replacement, paracrine effects, angiogenesis, synaptogenesis, immunomodulation, and apoptosis
inhibition, and SHED exosomes offer an ideal refined bed-to-bench formulation in neurodegenerative
disorders. However, in spite of these advantages, there are still some limitations of SHED
exosome therapy, such as the effectiveness of long-term storage of SHED and their exosomes, the
development of a robust GMP-grade manufacturing protocol, optimization of the route of administration,
and evaluation of the efficacy and safety in humans. In this review, we have addressed the
isolation, collection and properties of SHED along with its therapeutic potential on in vitro and in
vivo neuronal disorder models as evident from the published literature.