A Novel Two-factor Monosynaptic TRIO Tracing Method for Assessment of Circuit Integration of HESC-derived Dopamine Transplants
Overview
Authors
Affiliations
Transplantation in Parkinson's disease using human embryonic stem cell (hESC)-derived dopaminergic (DA) neurons is a promising future treatment option. However, many of the mechanisms that govern their differentiation, maturation, and integration into the host circuitry remain elusive. Here, we engrafted hESCs differentiated toward a ventral midbrain DA phenotype into the midbrain of a preclinical rodent model of Parkinson's disease. We then injected a novel DA-neurotropic retrograde MNM008 adeno-associated virus vector capsid, into specific DA target regions to generate starter cells based on their axonal projections. Using monosynaptic rabies-based tracing, we demonstrated for the first time that grafted hESC-derived DA neurons receive distinctly different afferent inputs depending on their projections. The similarities to the host DA system suggest a previously unknown directed circuit integration. By evaluating the differential host-to-graft connectivity based on projection patterns, this novel approach offers a tool to answer outstanding questions regarding the integration of grafted hESC-derived DA neurons.
A systematic review of progenitor survival and maturation in Parkinsonian models.
Comini G, Dowd E Neural Regen Res. 2024; 20(11):3172-3178.
PMID: 39589166 PMC: 11881725. DOI: 10.4103/NRR.NRR-D-24-00894.
Fiorenzano A, Storm P, Sozzi E, Bruzelius A, Corsi S, Kajtez J Proc Natl Acad Sci U S A. 2024; 121(47):e2410331121.
PMID: 39541349 PMC: 11588066. DOI: 10.1073/pnas.2410331121.
Advances in Recombinant Adeno-Associated Virus Vectors for Neurodegenerative Diseases.
Li L, Vasan L, Kartono B, Clifford K, Attarpour A, Sharma R Biomedicines. 2023; 11(10).
PMID: 37893099 PMC: 10603849. DOI: 10.3390/biomedicines11102725.
Nie L, Yao D, Chen S, Wang J, Pan C, Wu D Cell Death Discov. 2023; 9(1):215.
PMID: 37393356 PMC: 10314944. DOI: 10.1038/s41420-023-01532-9.
Rajova J, Davidsson M, Avallone M, Hartnor M, Aldrin-Kirk P, Cardoso T Mol Ther Methods Clin Dev. 2023; 29:381-394.
PMID: 37251982 PMC: 10209706. DOI: 10.1016/j.omtm.2023.04.008.