RGD Reference Report - Effects of supplemental erythropoietin on its receptor expression and signal transduction pathways in rat model of retinal detachment. - Rat Genome Database

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Effects of supplemental erythropoietin on its receptor expression and signal transduction pathways in rat model of retinal detachment.

Authors: Xie, Z  Chen, F  Wu, X  Zhuang, C  Zhu, J  Wang, J  Ji, H  Wang, Y  Hua, X 
Citation: Xie Z, etal., Curr Eye Res. 2012 Feb;37(2):138-44. doi: 10.3109/02713683.2011.647225.
RGD ID: 10411890
Pubmed: PMID:22251399   (View Abstract at PubMed)
DOI: DOI:10.3109/02713683.2011.647225   (Journal Full-text)

PURPOSE: The aim of this study was to investigate the effects of supplemental erythropoietin (EPO) on its receptor (EPOR) and signal transduction pathways in rat model of retinal detachment (RD). METHODS: To investigate the effect of EPO on EPOR expression in RD rats 100, 200 or 400 ng EPO was injected into the vitreous cavity immediately after RD model was induced. Western blot and immunohistochemistry analyses were performed to measure EPOR expression. To investigate the effect of EPO on signal transduction pathways in RD rats single dose of 400 ng EPO was injected into the vitreous cavity immediately after RD model was induced. The total and phosphorylated levels of JAK2, Akt, ERK-1/2, STAT5 and NF-kappaB were assessed by western blot. RESULTS: Western blot analysis showed that, compared with the normal control group, EPOR expression in the neurosensory retina was significantly increased in experimental RD groups (P < 0.05), but the differences were not significant between experimental RD groups (P > 0.05). Immunohistochemical examination indicated that EPOR staining on retinas became strongly positive 3 days after RD, with no significant difference in staining intensities between the treatment groups. Phosphorylated levels of JAK2, Akt, ERK-1/2, STAT5, and NF-kappaB were enhanced 3 days after RD, but only JAK2, Akt, and ERK-1/2 phosphorylation was further enhanced by 400 ng EPO treatment (P < 0.05). CONCLUSIONS: Supplementary EPO cannot affect EPOR expression in detached retina, but EPO may activate both PI-3K/Akt and MAPK/ERK-1/2 signal transduction pathways in RD model.



RGD Manual Disease Annotations    Click to see Annotation Detail View

  
Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
JAK2Humanretinal detachment  ISOJak2 (Rattus norvegicus)protein:increased tyrosine phosphorylation:retinaRGD 
Jak2Ratretinal detachment  IDA protein:increased tyrosine phosphorylation:retinaRGD 
Jak2Mouseretinal detachment  ISOJak2 (Rattus norvegicus)protein:increased tyrosine phosphorylation:retinaRGD 

Objects Annotated

Genes (Rattus norvegicus)
Jak2  (Janus kinase 2)

Genes (Mus musculus)
Jak2  (Janus kinase 2)

Genes (Homo sapiens)
JAK2  (Janus kinase 2)


Additional Information