Evidence map›Paper›PMID 26093627›Full record

ArticleJIMD reports2015

The Pigment in Alkaptonuria Relationship to Melanin and Other Coloured Substances: A Review of Metabolism, Composition and Chemical Analysis.

N B Roberts, S A Curtis, A M Milan, L R Ranganath

Open access · bronzeAbstract read
In one paragraph

Article in JIMD reports, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
7.5field-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

16 citing papers in PubMed, 35 citations in OpenAlex.

  1. Antioxidant and Tyrosinase Inhibitory Potential ofJournal of pharmacopuncture · 2026
    Article
  2. Article
  3. Exploring the Osteoinductive Potential of Bacterial Pyomelanin Derived fromInternational journal of molecular sciences · 2024
    Article
  4. Article
  5. Article
  6. Article
  7. Review
  8. Review
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Progress in Alkaptonuria--are we near to an effective therapy?Journal of inherited metabolic disease · 2015
    Article
  16. Review
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

4 authors at 1 institution in 1 country.

N B RobertsDepartment of Clinical Biochemistry and Metabolic Medicine, The Royal Liverpool and Broadgreen University Hospitals Trust, Liverpool, L7 8XP, UK. n.b.roberts@liverpool.ac.uk.
S A CurtisDepartment of Clinical Biochemistry and Metabolic Medicine, The Royal Liverpool and Broadgreen University Hospitals Trust, Liverpool, L7 8XP, UK.
A M MilanDepartment of Clinical Biochemistry and Metabolic Medicine, The Royal Liverpool and Broadgreen University Hospitals Trust, Liverpool, L7 8XP, UK.
L R RanganathDepartment of Clinical Biochemistry and Metabolic Medicine, The Royal Liverpool and Broadgreen University Hospitals Trust, Liverpool, L7 8XP, UK.
Royal Liverpool and Broadgreen University Hospital NHS Trust · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The pigments found in plants, animals and humic substances are well described and classified. In humans considerable progress has been made with the main pigment melanin in defining its biochemistry, the different types and function. However, analytical techniques to show these differences in vivo are still not readily available. NMR and IR spectroscopy are relatively insensitive and reveal only major structural differences. Techniques utilising MS are useful in determining elemental content but require further studies to optimise conditions for accurate mass analysis. How the components may be structurally organised seems to be the most problematic with scanning TEM and the improved FTIR of use in this respect. As regards understanding the nature of the pigment related to HGA seen in patients with Alkaptonuria (AKU), it is still thought of as a melaninlike pigment simply because of its colour and likewise thought to be a polymer of undetermined size. It is important that detailed analysis be carried out to define more accurately this pigment. However, observations suggest it to be the same as the HGA-derived pigment, pyomelanin, produced by bacteria and containing both quinone and phenolic groups. The interesting developments in alkaptonuria will be to understand how such a polymer can cause such profound collagen and connective tissue damage and how best to reverse this process.

Identifiers

PMID26093627
PMCPMC4582024
OpenAlexW635403289

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.