Evidence map›Paper›PMID 19850875›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2009

Spatiotemporally separable Shh domains in the midbrain define distinct dopaminergic progenitor pools.

Milan Joksimovic, Angela Anderegg, Anil Roy, Laura Campochiaro, Beth Yun, Raja Kittappa, Ronald McKay, Rajeshwar Awatramani

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 72 papers.

0numbers the graph read from it
0cells of the map it votes in
72citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

72 citing papers in PubMed.

  1. Neuroprotective role of bilirubin in Parkinson's disease.Frontiers in aging neuroscience · 2026
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  13. CRISPR/Cas9-based QF2 knock-in at theFrontiers in neuroanatomy · 2023
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  19. On the Road from Phenotypic Plasticity to Stem Cell Therapy.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2021
    Article
  20. Review

12 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Milan JoksimovicNorthwestern University Feinberg School of Medicine, Department of Neurology and Center for Genetic Medicine, 7-113 Lurie Building, 303 East Superior Street, Chicago, IL 60611, USA.
Angela Anderegg
Anil Roy
Laura Campochiaro
Beth Yun
Raja Kittappa
Ronald McKay
Rajeshwar Awatramani

Funding

MEDICAL SCIENTIST TRAINING PROGRAMT32GM008152 · NIGMS · NORTHWESTERN UNIVERSITY AT CHICAGO · PI ARDEHALI, HOSSEIN · 1987 to 2021
$24.0M
Stem Cell Biology And Brain DiseaseZIANS002981 · NINDS · NATIONAL INSTITUTE OF NEUROLOGICAL DISORDERS AND STROKE · PI MCKAY, RONALD · 2009 to 2011
$6.6M
6 · The paper itself

Abstract

Midbrain dopamine neurons (mDA) are important regulators of diverse physiological functions, including movement, attention, and reward behaviors. Accordingly, aberrant function of dopamine neurons underlies a wide spectrum of disorders, such as Parkinson's disease (PD), dystonia, and schizophrenia. The distinct functions of the dopamine system are carried out by neuroanatomically discrete subgroups of dopamine neurons, which differ in gene expression, axonal projections, and susceptibility in PD. The developmental underpinnings of this heterogeneity are undefined. We have recently shown that in the embryonic CNS, mDA originate from the midbrain floor plate, a ventral midline structure that is operationally defined by the expression of the molecule Shh. Here, we develop these findings to reveal that in the embryonic midbrain, the spatiotemporally dynamic Shh domain defines multiple progenitor pools. We deduce 3 distinct progenitor pools, medial, intermediate, and lateral, which contribute to different mDA clusters. The earliest progenitors to express Shh, here referred to as the medial pool, contributes neurons to the rostral linear nucleus and mDA of the ventral tegmental area/interfascicular regions, but remarkably, little to the substantia nigra pars compacta. The intermediate Shh+ progenitors give rise to neurons of all dopaminergic nuclei, including the SNpc. The last and lateral pool of Shh+ progenitors generates a cohort that populates the red nucleus, Edinger Westphal nucleus, and supraoculomotor nucleus and cap. Subsequently, these lateral Shh+ progenitors produce mDA. This refined ontogenetic definition will expand understanding of dopamine neuron biology and selective susceptibility, and will impact stem cell-derived therapies and models for PD.

Indexed as

Models, NeurologicalAnimalsDopamineGalactosidesHedgehog ProteinsHistocytochemistryIndolesIn Situ HybridizationMesencephalonMiceMice, TransgenicMicroscopy, FluorescenceNeuronsProtein Structure, TertiaryStem Cells5-bromo-4-chloro-3-indolyl beta-galactosideDopamineGalactosidesHedgehog ProteinsIndolesShh protein, mouse

Identifiers

PMID19850875
PMCPMC2776440

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.