New studies may help to explain the path from stem cells to dopamine neurons.
The Lund experiments use modern global gene expression studies to better understand the path from a stem cell to a dopamine neuron. NeuroscienceNews.com image is credited to university at Buffalo.
The first transplantation of stem cells in patients with Parkinson’s disease is almost within reach. However, it remains a challenge for researchers to control stem cells accurately in the lab in order to achieve successful and functional stem cell therapies for patients.
“Dopamine is an organic chemical of the catecholamine and phenethylamine families that plays several important roles in the brain and body. It is an amine synthesized by removing a carboxyl from a molecule of its precursor chemical L-DOPA, which is synthesized in the brain and kidneys. Dopamine is also synthesized in plants and most multicellular animals.”
“In our preclinical assessments of stem cell-derived dopamine neurons we noticed that the outcome in animal models varied dramatically, even though the cells were very similar at the time of transplantation. This has been frustrating and puzzling, and has significantly delayed the establishment of clinical cell production protocols,” says Malin Parmar who led the study conducted at Lund University as part of the EU network Neuro-Stem-cell-Repair.
The Lund experiments use modern global gene expression studies to better understand the path from a stem cell to a dopamine neuron. The data has been generated in close collaboration with a team of scientists at Karolinska Institute lead by Professor Thomas Perlmann, and is closely linked with a second study from the same cluster of scientists. The second study sheds new light on how dopamine neurons are formed during development, and what makes them different from other similar and neigh boring neurons.
This new insight has enabled a streamlined differentiation process resulting in pure populations of dopamine neurons of high quality.
“We have identified a specific set of markers that correlate with high dopaminergic yield and graft function after transplantation in animal models of Parkinson’s disease. Guided by this information, we have developed a better, and more accurate methods for producing dopamine cells for clinical use in a reproducible way,” says first author Agnete Kirkeby.
The new results, published in two back-to-back articles in the leading journal in the field, Cell Stem Cell, propel stem cell therapy for Parkinson’s disease towards clinical application. The first transplants are expected to be only a few years away.Source: Lund University.
