Evidence map›Paper›PMID 22985423›Full record

ArticleJournal of neuroinflammation2012

Complement is dispensable for neurodegeneration in Niemann-Pick disease type C.

Manuel E Lopez, Andres D Klein, Matthew P Scott

Open access · goldAbstract read
In one paragraph

Article in Journal of neuroinflammation, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed
1.2field-weighted citation impact, top 21% 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

28 citing papers in PubMed, 41 citations in OpenAlex.

  1. Review
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  17. Gadolinium Chloride Rescues Niemann⁻Pick Type C Liver Damage.International journal of molecular sciences · 2018
    Article
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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

3 authors at 1 institution in 1 country.

Manuel E LopezDepartment of Developmental Biology, Howard Hughes Medical Institute, Stanford University School of Medicine, Clark Center W200, 318 Campus Drive, Stanford, CA, USA.
Andres D Klein
Matthew P Scott
Stanford University · US

Funding

GENETICS TRAINING PROGRAM FOR PHD CANDIDATEST32GM007790 · NIGMS · STANFORD UNIVERSITY · PI BRUNET, ANNE, KINGSLEY, DAVID M · 1985 to 2020
$12.8M
Rescuing Niemann-Pick C Disease: Pathways of Liver and Brain DegenerationR01NS073691 · NINDS · STANFORD UNIVERSITY · PI PFEFFER, SUZANNE R · 2011 to 2013
$947k
Howard Hughes Medical InstituteNIGMS NIH HHS GM007276NIGMS NIH HHS GM07790NINDS NIH HHS R01 NS073691
6 · The paper itself

Abstract

backgroundThe immune system has been implicated in neurodegeneration during development and disease. In various studies, the absence of complement (that is, C1q deficiency) impeded the elimination of apoptotic neurons, allowing survival. In the genetic lysosomal storage disease Niemann-Pick C (NPC), caused by loss of NPC1 function, the expression of complement system components, C1q especially, is elevated in degenerating brain regions of Npc1-/- mice. Here we test whether complement is mediating neurodegeneration in NPC disease.

findingsIn normal mature mice, C1q mRNA was found in neurons, particularly cerebellar Purkinje neurons (PNs). In Npc1-/- mice, C1q mRNA was additionally found in activated microglia, which accumulate during disease progression and PN loss. Interestingly, C1q was not enriched on or near degenerating neurons. Instead, C1q was concentrated in other brain regions, where it partially co-localized with a potential C1q inhibitor, chondroitin sulfate proteoglycan (CSPG). Genetic deletion of C1q, or of the downstream complement pathway component C3, did not significantly alter patterned neuron loss or disease progression. Deletion of other immune response factors, a Toll-like receptor, a matrix metalloprotease, or the apoptosis facilitator BIM, also failed to alter neuron loss.

conclusionWe conclude that complement is not involved in the death and clearance of neurons in NPC disease. This study supports a view of neuroinflammation as a secondary response with non-causal relationship to neuron injury in the disease. This disease model may prove useful for understanding the conditions in which complement and immunity do contribute to neurodegeneration in other disorders.

Indexed as

AnimalsBrainComplement C1qComplement System ProteinsDisease Models, AnimalGene Expression RegulationIntracellular Signaling Peptides and ProteinsMiceMice, TransgenicMicrogliaNeurodegenerative DiseasesNeuronsNiemann-Pick C1 ProteinNiemann-Pick Disease, Type CProteinsRNA, MessengerComplement C1qComplement System ProteinsIntracellular Signaling Peptides and ProteinsNiemann-Pick C1 ProteinNpc1 protein, mouseProteinsRNA, Messenger

Identifiers

PMID22985423
PMCPMC3511250
OpenAlexW2130684865

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.