Margarida Azevedo
MAY
20, 2016
Scientists at the Buck Institute for Research on Aging have
derived 10 induced pluripotent stem cells (iPSC) lines
from Parkinson’s disease (PD) patients that carry the most common
mutations associated with the disease. These cell lines and related genomic
information will be made available to the larger scientific community, and PD
models created using them may help to further understanding of the
disease’s underlying causes, and to discover new diagnostic biomarkers and
therapeutic drugs.
The cell lines are in the process of being deposited at a
facility approved by the U.S. National Institutes of Health (NIH).
PD, a progressive and neurodegenerative disease, is
characterized by the loss of control of balance, movement, and coordination, as
well as a higher risk of dementia. While some patients have a family
history of the disease, most cases are not inherited. Scientists believe
the underlying causes of PD stem from a combination of genetic,
environmental, and epigenetic factors, but questions remain. According to
the National
Parkinson Foundation, about 10% to 15% of Parkinson’s cases are
thought to derive from mutations in specific genes, such as LRRK2, PARK2 and
GBA.
Researchers, led by Xianmin Zeng, PhD, derived iPSC lines
from skin cells donated by PD patients carrying the mutations SNCA, LRRK2,
PARK2 and GBA. These cells were them reprogrammed to exhibit embryonic stem
cell behavior, and induced to differentiate into dopaminergic neurons, the
cells affected in PD. At each stage of the process, the scientists performed
whole genome expression analysis.
“This work combined with dozens of other control, isogenic and reporter
iPSC lines developed by Dr. Zeng, will enable researchers to model PD in a
dish,” Dr. Brian Kennedy, Buck Institute president and CEO, said in
a news release.
“Her work, which we are extremely proud of, will help researchers dissect how
genes interact with each other to cause PD, and assist scientists to better
understand what experimental drugs are doing at the molecular level to decide
what drugs to use based on mutations.”
A need exists for new and accurate PD models, since neurons
obtained from patients have limited value, and animal models inadequately
represent the human disease process.
“We think this is the largest collection of patient-derived
lines generated at an academic institute,” said Dr. Zeng, who is working
on a stem cell replacement therapy for PD. “We believe the lines and the
datasets we have generated from them will be a valuable resource for use in
modeling PD and for the development of new therapeutics.”
The research article, “Derivation, Characterization, and Neural Differentiation
of Integration-Free Induced Pluripotent Stem Cell Lines from Parkinson’s
Disease Patients Carrying SNCA, LRRK2, PARK2, and GBA Mutations,”
was published in PLOS One.
The Buck Institute, a nonprofit and independent biomedical
research center, is based in Novato, California.
http://parkinsonsnewstoday.com/2016/05/20/buck-research-may-provide-missing-link-search-parkinsons-disease-therapeutics/
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