Molecular profiling of human substantia nigra identifies diverse neuron types associated with vulnerability in Parkinson’s disease

Author:

Wang Qian12345ORCID,Wang Minghui156ORCID,Choi Insup234ORCID,Sarrafha Lily234ORCID,Liang Marianna234ORCID,Ho Lap156ORCID,Farrell Kurt347ORCID,Beaumont Kristin G.1ORCID,Sebra Robert168,De Sanctis Claudia9ORCID,Crary John F.347910,Ahfeldt Tim31112ORCID,Blanchard Joel31112ORCID,Neavin Drew13ORCID,Powell Joseph1314ORCID,Davis David A.15ORCID,Sun Xiaoyan15,Zhang Bin15616ORCID,Yue Zhenyu23417ORCID

Affiliation:

1. Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY 10029, USA.

2. Department of Neurology, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY 10029, USA.

3. Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue, New York, NY 10029, USA.

4. Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue, New York, NY 10029, USA.

5. Mount Sinai Center for Transformative Disease Modeling, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue, New York, NY 10029, USA.

6. Icahn Institute of Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY 10029, USA.

7. Department of Pathology, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue, New York, NY 10029, USA.

8. Sema4, a Mount Sinai venture, Stamford, CT 06902, USA.

9. Neuropathology Brain Bank & Research CoRE, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue, New York, NY 10029, USA.

10. Department of Artificial Intelligence & Human Health, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue, NY 10029, USA.

11. Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY 10029, USA.

12. Ronald Loeb Alzheimer’s Disease Center, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY 10029, USA.

13. Garvan-Weizmann Centre for Cellular Genomics, Garvan Institute for Medical Research, 384 Victoria Street, Sydney 2010, Australia.

14. UNSW Cellular Genomics Futures Institute, University of New South Wales, Kensington, Sydney 2052, Australia.

15. Department of Neurology, Evelyn F. McKnight Brain Institute, Brain Endowment Bank, University of Miami Miller School of Medicine, Miami, FL 33136, USA.

16. Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY 10029, USA.

17. The Center for Parkinson’s Disease Neurobiology, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue, New York, NY 10029, USA.

Abstract

Parkinson’s disease (PD) is characterized pathologically by the loss of dopaminergic (DA) neurons in the substantia nigra (SN). Whether cell types beyond DA neurons in the SN show vulnerability in PD remains unclear. Through transcriptomic profiling of 315,867 high-quality single nuclei in the SN from individuals with and without PD, we identified cell clusters representing various neuron types, glia, endothelial cells, pericytes, fibroblasts, and T cells and investigated cell type–dependent alterations in gene expression in PD. Notably, a unique neuron cluster marked by the expression of RIT2 , a PD risk gene, also displayed vulnerability in PD. We validated RIT2 -enriched neurons in midbrain organoids and the mouse SN. Our results demonstrated distinct transcriptomic signatures of the RIT2 -enriched neurons in the human SN and implicated reduced RIT2 expression in the pathogenesis of PD. Our study sheds light on the diversity of cell types, including DA neurons, in the SN and the complexity of molecular and cellular changes associated with PD pathogenesis.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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