Evidence map›Paper›PMID 22427201›Full record

Trial reportBlood2012

Integrated protein quality-control pathways regulate free α-globin in murine β-thalassemia.

Eugene Khandros, Christopher S Thom, Janine D'Souza, Mitchell J Weiss

Open access · bronzeAbstract readClinical Trial
In one paragraph

Trial report in Blood, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 67 papers.

0numbers the graph read from it
0cells of the map it votes in
67citing papers in PubMed
3.8field-weighted citation impact, top 6% 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

67 citing papers in PubMed, 99 citations in OpenAlex.

  1. New Gene Therapy Strategy for β-Thalassemia.Stem cell reviews and reports · 2026
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  15. Autologous gene therapy for hemoglobinopathies: From bench to patient's bedside.Molecular therapy : the journal of the American Society of Gene Therapy · 2024
    Review
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  20. Review

7 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

4 authors at 2 institutions in 1 country.

Eugene KhandrosCell and Molecular Biology Graduate Group, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA.
Christopher S Thom
Janine D'Souza
Mitchell J Weiss
Children's Hospital of Philadelphia · USUniversity of Pennsylvania · US

Funding

MEDICAL SCIENTIST TRAINING PROGRAMT32GM007170 · NIGMS · UNIVERSITY OF PENNSYLVANIA · PI BRASS, LAWRENCE F · 1985 to 2022
$54.0M
Research BaseP30DK090969 · NIDDK · CHILDREN'S HOSP OF PHILADELPHIA · PI CARROLL, MARTIN · 2010 to 2015
$5.7M
Trim58 and the Ubiquitin Proteasome System in Erythro-megakaryopoiesisR01DK061692 · NIDDK · ST. JUDE CHILDREN'S RESEARCH HOSPITAL · PI WEISS, MITCHELL J · 2002 to 2018
$5.6M
The Role of Alpha Hemoglobin Stabilizing Protein in Human Beta ThalassemiaR01HL087427 · NHLBI · CHILDREN'S HOSP OF PHILADELPHIA · PI WEISS, MITCHELL J · 2007 to 2010
$1.6M
The function and regulation of alpha hemoglobin stabilizing protein (AHSP) in hemR56DK061692 · NIDDK · CHILDREN'S HOSP OF PHILADELPHIA · PI WEISS, MITCHELL J · 2007 to 2007
$83k
NHLBI NIH HHS HL087427NHLBI NIH HHS R01 HL087427NIDDK NIH HHS DK061692NIDDK NIH HHS P30 DK090969NIDDK NIH HHS P30DK090969NIDDK NIH HHS R01 DK061692NIDDK NIH HHS R56 DK061692NIGMS NIH HHS 3T32GM007170-35S1NIGMS NIH HHS T32 GM007170
6 · The paper itself

Abstract

Cells remove unstable polypeptides through protein quality-control (PQC) pathways such as ubiquitin-mediated proteolysis and autophagy. In the present study, we investigated how these pathways are used in β-thalassemia, a common hemoglobinopathy in which β-globin gene mutations cause the accumulation and precipitation of cytotoxic α-globin subunits. In β-thalassemic erythrocyte precursors, free α-globin was polyubiquitinated and degraded by the proteasome. These cells exhibited enhanced proteasome activity, and transcriptional profiling revealed coordinated induction of most proteasome subunits that was mediated by the stress-response transcription factor Nrf1. In isolated thalassemic cells, short-term proteasome inhibition blocked the degradation of free α-globin. In contrast, prolonged in vivo treatment of β-thalassemic mice with the proteasome inhibitor bortezomib did not enhance the accumulation of free α-globin. Rather, systemic proteasome inhibition activated compensatory proteotoxic stress-response mechanisms, including autophagy, which cooperated with ubiquitin-mediated proteolysis to degrade free α-globin in erythroid cells. Our findings show that multiple interregulated PQC responses degrade excess α-globin. Therefore, β-thalassemia fits into the broader framework of protein-aggregation disorders that use PQC pathways as cell-protective mechanisms.

Indexed as

Proteasome InhibitorsAlpha-GlobulinsAnimalsAntineoplastic Agentsbeta-ThalassemiaBoronic AcidsBortezomibCells, CulturedChildChild, PreschoolErythroid Precursor CellsFemaleHumansMaleMiceMice, TransgenicAlpha-GlobulinsAntineoplastic AgentsBoronic AcidsBortezomibNrf1 protein, mouseNuclear Respiratory Factor 1Proteasome Endopeptidase ComplexProteasome InhibitorsPyrazines

Identifiers

PMID22427201
PMCPMC3369615
OpenAlexW2052657961

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.