Evidence map›Paper›PMID 22253829›Full record

ArticlePloS one2012

Epigallocatechin-3-gallate as a potential therapeutic drug for TTR-related amyloidosis: "in vivo" evidence from FAP mice models.

Nelson Ferreira, Maria João Saraiva, Maria Rosário Almeida

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 54 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
54citing papers in PubMed, 1 pooled it
4.6field-weighted citation impact, top 4% 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

54 citing papers in PubMed, 1 synthesis or guideline pooled it, 103 citations in OpenAlex.

  1. Pharmacological treatment for familial amyloid polyneuropathy.The Cochrane database of systematic reviews · 2020
    Pooled it
  2. Trial
  3. Green tea halts progression of cardiac transthyretin amyloidosis: an observational report.Clinical research in cardiology : official journal of the German Cardiac Society · 2012
    Trial
  4. Review
  5. Review
  6. Review
  7. Review
  8. Review
  9. Article
  10. Review
  11. Hereditary transthyretin amyloidosis overview.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2022
    Review
  12. Cardiac Amyloidosis Treatment.Methodist DeBakey cardiovascular journal · 2022
    Review
  13. Article
  14. Molecular Mechanisms of Cardiac Amyloidosis.International journal of molecular sciences · 2021
    Review
  15. Review
  16. Chemical Chaperones Modulate the Formation of Metabolite Assemblies.International journal of molecular sciences · 2021
    Article
  17. Article
  18. Review
  19. Nutritional Value ofNutrients · 2021
    Article
  20. 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

3 authors at 1 institution in 1 country.

Nelson FerreiraGrupo de Neurobiologia Molecular, IBMC-Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal.
Maria João Saraiva
Maria Rosário Almeida
Universidade do Porto · PT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundFamilial amyloidotic polyneuropathy (FAP) is a neurodegenerative disease caused by the extracellular deposition of mutant transthyretin (TTR), with special involvement of the peripheral nervous system (PNS). Currently, hepatic transplantation is considered the most efficient therapy to halt the progression of clinical symptoms in FAP since more than 95% of TTR is produced by the liver. However, less invasive and more reliable therapeutic approaches have been proposed for FAP therapy, namely based on drugs acting as inhibitors of amyloid formation or as amyloid disruptors. We have recently reported that epigallocatechin-3-gallate (EGCG), the most abundant catechin in green tea, is able to inhibit TTR aggregation and fibril formation, "in vitro" and in a cellular system, and is also able to disrupt pre-formed amyloid fibrils "in vitro". METHODOLOGY AND PRINCIPAL

findingsIn the present study, we assessed the effect of EGCG subchronic administration on TTR amyloidogenesis "in vivo", using well characterized animal models for FAP. Semiquantitative immunohistochemistry (SQ-IHC) and Western blot analysis of mice tissues after treatment demonstrated that EGCG inhibits TTR toxic aggregates deposition in about 50% along the gastrointestinal tract (GI) and peripheral nervous system (PNS). Moreover EGCG treatment considerably lowered levels of several biomarkers associated with non-fibrillar TTR deposition, namely endoplasmic reticulum (ER)-stress, protein oxidation and apoptosis markers. Treatment of old FAP mice with EGCG resulted not only in the decrease of non-fibrillar TTR deposition but also in disaggregation of amyloid deposits. Consistently, matrix metalloproteinase (MMP)-9 and serum amyloid P component (SAP), both markers of amyloid deposition, were also found reduced in treated old FAP mice. CONCLUSIONS AND SIGNIFICANCE: The dual effect of EGCG both as TTR aggregation inhibitor and amyloid fibril disruptor together with the high tolerability and low toxicity of EGCG in humans, point towards the potential use of this compound, or optimized derivatives, in the treatment of TTR-related amyloidoses.

Indexed as

AmyloidAmyloid Neuropathies, FamilialAnimalsBiomarkersCatechinColonDisease Models, AnimalEndoplasmic Reticulum StressGastric MucosaHumansMiceMice, TransgenicPeripheral Nervous SystemPrealbuminStomachAmyloidBiomarkersCatechinepigallocatechin gallatePrealbumin

Identifiers

PMID22253829
PMCPMC3254632
OpenAlexW2085354241

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.