Evidence map›Paper›PMID 29042210›Full record

ArticleThe Journal of investigative dermatology2018

The Physicochemical Basis of Clofazimine-Induced Skin Pigmentation.

Mikhail D Murashov, Vernon LaLone, Phillip M Rzeczycki, Rahul K Keswani, Gi S Yoon, Sudha Sud, Walajapet Rajeswaran, Scott Larsen, Kathleen A Stringer, Gus R Rosania

Open access · greenAbstract read
In one paragraph

Article in The Journal of investigative dermatology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed, 1 pooled it
3.5field-weighted citation impact, top 7% 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

29 citing papers in PubMed, 1 synthesis or guideline pooled it, 54 citations in OpenAlex.

  1. Pooled it
  2. Observational
  3. Article
  4. Article
  5. Pharmaceuticals (Basel, Switzerland) · 2025
    Review
  6. Review
  7. Article
  8. Review
  9. Article
  10. Review
  11. ImprovedEuropean journal of medicinal chemistry reports · 2024
    Article
  12. Article
  13. Article
  14. Clofazimine for the treatment of tuberculosis.Frontiers in pharmacology · 2023
    Review
  15. Article
  16. Observational
  17. Pharmacologic Management ofOpen forum infectious diseases · 2022
    Review
  18. Molecular design of a pathogen activated, self-assembling mechanopharmaceutical device.Journal of controlled release : official journal of the Controlled Release Society · 2022
    Review
  19. Article
  20. Article
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

10 authors at 1 institution in 1 country.

Mikhail D MurashovDepartment of Pharmaceutical Sciences, University of Michigan, Ann Arbor, Michigan, USA.
Vernon LaLoneDepartment of Pharmaceutical Sciences, University of Michigan, Ann Arbor, Michigan, USA.
Phillip M RzeczyckiDepartment of Pharmaceutical Sciences, University of Michigan, Ann Arbor, Michigan, USA.
Rahul K KeswaniDepartment of Pharmaceutical Sciences, University of Michigan, Ann Arbor, Michigan, USA.
Gi S YoonDepartment of Pharmaceutical Sciences, University of Michigan, Ann Arbor, Michigan, USA.
Sudha SudDepartment of Pharmaceutical Sciences, University of Michigan, Ann Arbor, Michigan, USA.
Walajapet RajeswaranDepartment of Medicinal Chemistry, University of Michigan, Ann Arbor, Michigan, USA.
Scott LarsenDepartment of Medicinal Chemistry, University of Michigan, Ann Arbor, Michigan, USA.
Kathleen A StringerDepartment of Clinical Pharmacy, University of Michigan, Ann Arbor, Michigan, USA.
Gus R RosaniaDepartment of Pharmaceutical Sciences, University of Michigan, Ann Arbor, Michigan, USA. Electronic address: grosania@umich.edu.
University of Michigan–Ann Arbor · US

Funding

Chemical Address Tags: A Cheminformatics & Image Data Management and Analysis Plan - SupplementR01GM078200 · NIGMS · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI ROSANIA, GUS R · 2006 to 2015
$4.2M
NIGMS NIH HHS R01 GM078200
6 · The paper itself

Abstract

Clofazimine is a weakly basic, Food and Drug Administration-approved antibiotic recommended by the World Health Organization to treat leprosy and multi-drug-resistant tuberculosis. Upon prolonged treatment, clofazimine extensively bioaccumulates and precipitates throughout the organism, forming crystal-like drug inclusions (CLDIs). Due to the drug's red color, it is widely believed that clofazimine bioaccumulation results in skin pigmentation, its most common side effect. To test whether clofazimine-induced skin pigmentation is due to CLDI formation, we synthesized a closely related clofazimine analog that does not precipitate under physiological pH and chloride conditions that are required for CLDI formation. Despite the absence of detectable CLDIs in mice, administration of this analog still led to significant skin pigmentation. In clofazimine-treated mice, skin cryosections revealed no evidence of CLDIs when analyzed with a microscopic imaging system specifically designed for detecting clofazimine aggregates. Rather, the reflectance spectra of the skin revealed a signal corresponding to the soluble, free base form of the drug. Consistent with the low concentrations of clofazimine in the skin, these results suggest that clofazimine-induced skin pigmentation is not due to clofazimine precipitation and CLDI formation, but rather to the partitioning of the circulating, free base form of the drug into subcutaneous fat.

Indexed as

AnimalsClofazimineMiceMice, Inbred BALB CMice, Inbred C57BLRAW 264.7 CellsSkin PigmentationClofazimine

Identifiers

PMID29042210
PMCPMC5828885
OpenAlexW2765883709

What OpenQuestion holds

Textmetadata
LicenceTDM
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.