Evidence map›Paper›PMID 18207746›Full record

ArticleCurrent biology : CB2008

Morphine-induced receptor endocytosis in a novel knockin mouse reduces tolerance and dependence.

Joseph A Kim, Selena Bartlett, Li He, Carsten K Nielsen, Amy M Chang, Viktor Kharazia, Maria Waldhoer, Chrissi J Ou, Stacy Taylor, Madeline Ferwerda and 2 more

Open access · bronzeAbstract read
In one paragraph

Article in Current biology : CB, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 57 papers.

0numbers the graph read from it
0cells of the map it votes in
57citing papers in PubMed
6.2field-weighted citation impact, top 3% 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

57 citing papers in PubMed, 91 citations in OpenAlex.

  1. Review
  2. Article
  3. Article
  4. Mechanisms of cannabinoid tolerance.Biochemical pharmacology · 2023
    Review
  5. The Downregulation of Opioid Receptors and Neuropathic Pain.International journal of molecular sciences · 2023
    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

12 authors at 3 institutions in 1 country.

Joseph A KimErnest Gallo Clinic & Research Center, 5858 Horton St., Suite 200, Emeryville, California 94608, USA.
Selena Bartlett
Li He
Carsten K Nielsen
Amy M Chang
Viktor Kharazia
Maria Waldhoer
Chrissi J Ou
Stacy Taylor
Madeline Ferwerda
Dragana Cado
Jennifer L Whistler
Ernest Gallo Clinic and Research Center · USUniversity of California, Berkeley · USUniversity of California, San Francisco · US

Funding

Trafficking and signaling of opioid receptor subtypes and heterodimersR01DA015232 · NIDA · ERNEST GALLO CLINIC AND RESEARCH CENTER · PI WHISTLER, JENNIFER L · 2003 to 2010
$2.0M
Role of opioid receptor trafficking in tolerance and dependenceR01DA019958 · NIDA · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI WHISTLER, JENNIFER L · 2007 to 2011
$1.8M
NIDA NIH HHS DA015232NIDA NIH HHS DA019958NIDA NIH HHS R01 DA015232NIDA NIH HHS R01 DA019958
6 · The paper itself

Abstract

Opioid drugs, such as morphine, are among the most effective analgesics available. However, their utility for the treatment of chronic pain is limited by side effects including tolerance and dependence. Morphine acts primarily through the mu-opioid receptor (MOP-R) , which is also a target of endogenous opioids. However, unlike endogenous ligands, morphine fails to promote substantial receptor endocytosis both in vitro, and in vivo. Receptor endocytosis serves at least two important functions in signal transduction. First, desensitization and endocytosis act as an "off" switch by uncoupling receptors from G protein. Second, endocytosis functions as an "on" switch, resensitizing receptors by recycling them to the plasma membrane. Thus, both the off and on function of the MOP-R are altered in response to morphine compared to endogenous ligands. To examine whether the low degree of endocytosis induced by morphine contributes to tolerance and dependence, we generated a knockin mouse that expresses a mutant MOP-R that undergoes morphine-induced endocytosis. Morphine remains an excellent antinociceptive agent in these mice. Importantly, these mice display substantially reduced antinociceptive tolerance and physical dependence. These data suggest that opioid drugs with a pharmacological profile similar to morphine but the ability to promote endocytosis could provide analgesia while having a reduced liability for promoting tolerance and dependence.

Indexed as

Drug ToleranceAnimalsEndocytosisMiceMice, TransgenicMorphineMorphine DependenceReceptors, Opioid, muSubstance Withdrawal SyndromeMorphineReceptors, Opioid, mu

Identifiers

PMID18207746
PMCPMC2997702
OpenAlexW2169996576

What OpenQuestion holds

Textmetadata
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.