Evidence map›Paper›PMID 32368564›Full record

ArticleMolecular therapy. Methods & clinical development2020

Chronic 2-Fold Elevation of Endogenous GDNF Levels Is Safe and Enhances Motor and Dopaminergic Function in Aged Mice.

Giorgio Turconi, Jaakko Kopra, Vootele Võikar, Natalia Kulesskaya, Carolina Vilenius, T Petteri Piepponen, Jaan-Olle Andressoo

Open access · goldAbstract read
In one paragraph

Article in Molecular therapy. Methods & clinical development, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
1.4field-weighted citation impact, top 22% of its field
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

13 citing papers in PubMed, 18 citations in OpenAlex.

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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

7 authors at 1 institution in 2 countries.

Giorgio TurconiDepartment of Pharmacology, Faculty of Medicine and Helsinki Institute of Life Science, Haartmaninkatu 8, University of Helsinki, Helsinki 00014, Finland.
Jaakko KopraDivision of Pharmacology and Pharmacotherapy, Faculty of Pharmacy, Viikinkaari 5E, University of Helsinki, Helsinki 00014, Finland.
Vootele VõikarNeuroscience Center/Laboratory Animal Center, Mustialankatu 1, University of Helsinki, Helsinki 00014, Finland.
Natalia KulesskayaNeuroscience Center/Laboratory Animal Center, Mustialankatu 1, University of Helsinki, Helsinki 00014, Finland.
Carolina VileniusInstitute of Biotechnology, Viikinkaari 5D, University of Helsinki, Helsinki 00014, Finland.
T Petteri PiepponenDivision of Pharmacology and Pharmacotherapy, Faculty of Pharmacy, Viikinkaari 5E, University of Helsinki, Helsinki 00014, Finland.
Jaan-Olle AndressooDepartment of Pharmacology, Faculty of Medicine and Helsinki Institute of Life Science, Haartmaninkatu 8, University of Helsinki, Helsinki 00014, Finland.
University of Helsinki · FI

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Glial cell line-derived neurotrophic factor (GDNF) supports function and survival of dopamine neurons that degenerate in Parkinson's disease (PD). Ectopic delivery of GDNF in clinical trials to treat PD is safe but lacks significant therapeutic effect. In pre-clinical models, ectopic GDNF is effective but causes adverse effects, including downregulation of tyrosine hydroxylase, only a transient boost in dopamine metabolism, aberrant neuronal sprouting, and hyperactivity. Hindering development of GDNF mimetic increased signaling via GDNF receptor RET by activating mutations results in cancer. Safe and effective mode of action must be defined first in animal models to develop successful GDNF-based therapies. Previously we showed that about a 2-fold increase in endogenous GDNF expression is safe and results in increased motor and dopaminergic function and protection in a PD model in young animals. Recently, similar results were reported using a novel Gdnf mRNA-targeting strategy. Next, it is important to establish the safety of a long-term increase in endogenous GDNF expression. We report behavioral, dopamine system, and cancer analysis of five cohorts of aged mice with a 2-fold increase in endogenous GDNF. We found a sustained increase in dopamine levels, improvement in motor learning, and no side effects or cancer. These results support the rationale for further development of endogenous GDNF-based treatments and GDNF mimetic.

Indexed as

dopamine systemGDNFlong-term side effectsmotor functionsafety evaluation

Identifiers

PMID32368564
PMCPMC7191127
OpenAlexW3015497944

What OpenQuestion holds

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LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

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.