Cited by 62Acute Ischemic Stroke ManagementErythropoietin and Anemia TreatmentIntracerebral and Subarachnoid Hemorrhage Research

Erythropoietin in Combination of Tissue Plasminogen Activator Exacerbates Brain Hemorrhage When Treatment Is Initiated 6 Hours After Stroke

Open access
Jia, Longfei, Chopp, Michael, Zhang, Li, Lu, Mei, Zhang, Zhenggang·2010·Stroke

Abstract

Background and Purpose— Erythropoietin (EPO), a hematopoietic cytokine, exerts neuroprotective effects in experimental stroke. In the present study, we investigated the effect of recombinant human EPO (rhEPO) in combination with tissue plasminogen activator (tPA) on embolic stroke. Methods— Rats subjected to embolic middle cerebral artery occlusion (MCAO) were treated with rhEPO (5000 U/kg) in combination with tPA (10 mg/kg) at 2 or 6 hours after MCAO. Control groups consisted of ischemic rats treated with rhEPO (5000 U/kg) alone, tPA (10 mg/kg) alone, or saline at 2 or 6 hours after MCAO. Results— The combination therapy of rhEPO and tPA initiated 6 hours after MCAO did not reduce the ischemic lesion volume and significantly ( P <0.05) increased the incidence of brain hemorrhage measured by frequency of gross hemorrhage and a quantitative spectrophotometric hemoglobin assay compared with rats treated with rhEPO alone and tPA alone. However, when the combination therapy was initiated 2 hours after MCAO, the treatment significantly ( P <0.05) reduced the lesion volume and did not substantially increase the incidence of hemorrhagic transformation compared with saline-treated rats. Immunostaining analysis revealed that the combination therapy of rhEPO and tPA at 6 hours significantly ( P <0.05) increased matrix metalloproteinase-9, NF-κB, and interleukin-1 receptor-associated kinase-1 immunoreactive cerebral vessels compared with rats treated with rhEPO alone and saline. Conclusions— EPO exacerbates tPA-induced brain hemorrhage without reduction of ischemic brain damage when administered 6 hours after stroke in a rat model of embolic MCAO and that matrix metalloproteinase-9, NF-κB, and interleukin-1 receptor-associated kinase-1 upregulated by the delayed combination therapy may contribute to augmentation of brain hemorrhage.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1161/strokeaha.110.586198

Cites

36 of 36 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Jia, L., Chopp, M., Zhang, L., Lu, M., & Zhang, Z.
Affiliations
  • Henry Ford Health (US)
  • From the Departments of Neurology (L.J., M.C., L.Z., Z.Z.) and Biostatistics and Research Epidemiology (M.L.), Henry Ford Hospital, Detroit, Mich; and the Department of Physics (M.C.), Oakland University, Oakland, Mich.
Venue
Stroke
Published
2010-09
Volume
41
Issue
9
Pages
2071-2076
ISSN
  • 0039-2499 (ISSN-L)
  • 1524-4628
OpenAlex
W2123656924
Cited by
62
References
35
Citations by year
2024: 1 · 2022: 4 · 2021: 1 · 2020: 4 · 2019: 4 · 2018: 2 · 2017: 5 · 2016: 4 · 2015: 5 · 2014: 5 · 2013: 10 · 2012: 6
FWCI
6.28
Type
journal article
Language
en
Open access
Locations
  • Stroke (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Heart, Lung, and Blood Institute (R01HL064766, R01HL64766)
  • National Institute of Neurological Disorders and Stroke (P01NS23393, R01NS062832, P01NS023393)
Topics
  • Health Sciences › Medicine › Epidemiology › Acute Ischemic Stroke Management
  • Health Sciences › Medicine › Hematology › Erythropoietin and Anemia Treatment
  • Health Sciences › Medicine › Neurology › Intracerebral and Subarachnoid Hemorrhage Research
Keywords
erythropoietin, tissue plasminogen activator, cerebral hemorrhage, hemorrhagic transformation, embolic stroke, middle cerebral artery occlusion, treatment delay, combination therapy, MMP-9, NF-κB, neuroprotection, ischemic lesion volume
MeSH terms
Analysis of Variance, Animals, Brain, Drug Therapy, Combination, Erythropoietin, Immunohistochemistry, Male, Tissue Plasminogen Activator, Time Factors, Blotting, Western, Chi-Square Distribution, NF-kappa B, Treatment Outcome, Rats, Wistar, Intracranial Hemorrhages, Stroke, Matrix Metalloproteinase 9, Rats, Interleukin-1 Receptor-Associated Kinases

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review