Evidence map›Paper›PMID 22368764›Full record

ArticleACS chemical neuroscience2011

The Discovery and Characterization of ML218: A Novel, Centrally Active T-Type Calcium Channel Inhibitor with Robust Effects in STN Neurons and in a Rodent Model of Parkinson's Disease.

Zixiu Xiang, Analisa D Thompson, John T Brogan, Michael L Schulte, Bruce J Melancon, Debbie Mi, L Michelle Lewis, Bende Zou, Liya Yang, Ryan Morrison and 15 more

Open access · greenAbstract read
In one paragraph

Article in ACS chemical neuroscience, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 49 papers.

0numbers the graph read from it
0cells of the map it votes in
49citing papers in PubMed
2.3field-weighted citation impact, top 12% 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

49 citing papers in PubMed, 98 citations in OpenAlex.

  1. Chromatin topology control by a muscle-specific ribosomal protein.bioRxiv : the preprint server for biology · 2026
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  5. CaThe Journal of biological chemistry · 2025
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  7. Structural basis for human CaCell research · 2024
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  14. Multiple Calcium Channel Types with Unique Expression Patterns Mediate Retinal Signaling at Bipolar Cell Ribbon Synapses.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2022
    Article
  15. CaInternational journal of molecular sciences · 2022
    Review
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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

25 authors at 4 institutions in 1 country.

Zixiu XiangDepartment of Pharmacology, Vanderbilt University Medical Center, Nashville, TN 37232-6600, USA.
Analisa D Thompson
John T Brogan
Michael L Schulte
Bruce J Melancon
Debbie Mi
L Michelle Lewis
Bende Zou
Liya Yang
Ryan Morrison
Tammy Santomango
Frank Byers
Katrina Brewer
Jonathan S Aldrich
Haibo Yu
Eric S Dawson
Min Li
Owen McManus
Carrie K Jones
J Scott Daniels
Corey R Hopkins
Ximin Simon Xie
P Jeffrey Conn
C David Weaver
Craig W Lindsley
Vanderbilt University · USAfaSci (United States) · USJohns Hopkins University · USVanderbilt University Medical Center · US

Funding

The Vanderbilt Specialized Chemistry Center for Accelerated Probe DevelopmentU54MH084659 · NIMH · VANDERBILT UNIVERSITY · PI LINDSLEY, CRAIG · 2008 to 2013
$24.1M
Johns Hopkins Ion Channel CenterU54MH084691 · NIMH · JOHNS HOPKINS UNIVERSITY · PI LI, MIN · 2008 to 2012
$13.9M
NIMH NIH HHS U54 MH084659NIMH NIH HHS U54 MH084691
6 · The paper itself

Abstract

T-type Ca(2+) channel inhibitors hold tremendous therapeutic potential for the treatment of pain, epilepsy, sleep disorders, essential tremor and other neurological disorders; however, a lack of truly selective tools has hindered basic research, and selective tools from the pharmaceutical industry are potentially burdened with intellectual property (IP) constraints. Thus, an MLPCN high-throughput screen (HTS) was conducted to identify novel T-type Ca(2+) channel inhibitors free from IP constraints, and freely available through the MLPCN, for use by the biomedical community to study T-type Ca(2+) channels. While the HTS provided numerous hits, these compounds could not be optimized to the required level of potency to be appropriate tool compounds. Therefore, a scaffold hopping approach, guided by SurflexSim, ultimately afforded ML218 (CID 45115620) a selective T-Type Ca(2+) (Ca(v)3.1, Ca(v)3.2, Ca(v)3.3) inhibitor (Ca(v)3.2, IC(50) = 150 nM in Ca(2+) flux; Ca(v)3.2 IC(50) = 310 nM and Ca(v)3.3 IC(50) = 270 nM, respectively in patch clamp electrophysiology) with good DMPK properties, acceptable in vivo rat PK and excellent brain levels. Electrophysiology studies in subthalamic nucleus (STN) neurons demonstrated robust effects of ML218 on the inhibition of T-Type calcium current, inhibition of low threshold spike and rebound burst activity. Based on the basal ganglia circuitry in Parkinson's disease (PD), the effects of ML218 in STN neurons suggest a therapeutic role for T-type Ca(2+) channel inhibitors, and ML218 was found to be orally efficacious in haloperidol-induced catalepsy, a preclinical PD model, with comparable efficacy to an A(2A) antagonist, a clinically validated PD target. ML218 proves to be a powerful new probe to study T-Type Ca(2+) function in vitro and in vivo, and freely available.

Identifiers

PMID22368764
PMCPMC3285241
OpenAlexW1964092556

What OpenQuestion holds

Textmetadata
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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.