Evidence map›Paper›PMID 42057745›Full record

ArticleACS chemical neuroscience2026

Structural Determinants of μ-Opioid Receptor Antagonism and Respiratory Liability in Phenylfentanyl Analogues.

Ennian Li, Balaji S Kale, Abeje A Silte, Rui Lyu, Neha Upadhyay, Logan T Neel, Ahmed Reda, Huiqun Wang, William L Dewey, Piyusha P Pagare and 1 more

Abstract read
In one paragraph

Article in ACS chemical neuroscience, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing 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

0 citing papers in PubMed.

No citing paper in PubMed yet.

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

11 authors.

Ennian LiDepartment of Medicinal Chemistry, School of Pharmacy, Virginia Commonwealth University, 800 East Leigh Street, Richmond, Virginia 23298, United States.ORCID 0000-0002-6761-7713
Balaji S KaleDepartment of Medicinal Chemistry, School of Pharmacy, Virginia Commonwealth University, 800 East Leigh Street, Richmond, Virginia 23298, United States.ORCID 0000-0002-5049-5895
Abeje A SilteDepartment of Medicinal Chemistry, School of Pharmacy, Virginia Commonwealth University, 800 East Leigh Street, Richmond, Virginia 23298, United States.ORCID 0000-0002-7312-0818
Rui LyuDepartment of Medicinal Chemistry, School of Pharmacy, Virginia Commonwealth University, 800 East Leigh Street, Richmond, Virginia 23298, United States.
Neha UpadhyayDepartment of Medicinal Chemistry, School of Pharmacy, Virginia Commonwealth University, 800 East Leigh Street, Richmond, Virginia 23298, United States.
Logan T NeelDepartment of Medicinal Chemistry, School of Pharmacy, Virginia Commonwealth University, 800 East Leigh Street, Richmond, Virginia 23298, United States.ORCID 0000-0002-4685-2300
Ahmed RedaDepartment of Medicinal Chemistry, School of Pharmacy, Virginia Commonwealth University, 800 East Leigh Street, Richmond, Virginia 23298, United States.
Huiqun WangDepartment of Medicinal Chemistry, School of Pharmacy, Virginia Commonwealth University, 800 East Leigh Street, Richmond, Virginia 23298, United States.
William L DeweyDepartment of Pharmacology and Toxicology, School of Medicine, Virginia Commonwealth University, 410 North 12th Street, Richmond, Virginia 23298, United States.
Piyusha P PagareDepartment of Medicinal Chemistry, School of Pharmacy, Virginia Commonwealth University, 800 East Leigh Street, Richmond, Virginia 23298, United States.ORCID 0000-0002-4848-2673
Yan ZhangDepartment of Medicinal Chemistry, School of Pharmacy, Virginia Commonwealth University, 800 East Leigh Street, Richmond, Virginia 23298, United States.ORCID 0000-0001-8934-7016

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The μ-opioid receptor (MOR) plays a key role in opioid addiction and fentanyl-induced respiratory depression. Phenylfentanyl, previously reported as a MOR antagonist, paradoxically induces respiratory depression in vivo, revealing a dissociation between receptor antagonism and respiratory liability within this scaffold. To interrogate structural determinants underlying this activity profile, phenylfentanyl was redesigned through systematic modification of the acyl chain,

Indexed as

Analgesics, OpioidFentanylNarcotic AntagonistsReceptors, Opioid, muRespiratory InsufficiencyAnimalsDose-Response Relationship, DrugHumansStructure-Activity RelationshipAnalgesics, OpioidFentanylNarcotic AntagonistsReceptors, Opioid, mucore ring extensionfentanylisosteric modificationphenylfentanylrespiratory depression

Identifiers

PMID42057745
PMCPMC13195661

What OpenQuestion holds

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LicenceCC BY
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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.