RGD Reference Report - Exosomal cyclophilin A as a novel noninvasive biomarker for Epstein-Barr virus associated nasopharyngeal carcinoma. - Rat Genome Database

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Exosomal cyclophilin A as a novel noninvasive biomarker for Epstein-Barr virus associated nasopharyngeal carcinoma.

Authors: Liu, Lingzhi  Zuo, Lielian  Yang, Jing  Xin, Shuyu  Zhang, Jing  Zhou, Jianhua  Li, Guiyuan  Tang, Jinyong  Lu, Jianhong 
Citation: Liu L, etal., Cancer Med. 2019 Jun;8(6):3142-3151. doi: 10.1002/cam4.2185. Epub 2019 May 7.
RGD ID: 150429622
Pubmed: PMID:31063269   (View Abstract at PubMed)
PMCID: PMC6558463   (View Article at PubMed Central)
DOI: DOI:10.1002/cam4.2185   (Journal Full-text)

Exosomes have emerged as novel vehicles for proteins and other contents in cancer progression. Cyclophilin A (CYPA) is a pivotal member of immunophilin family. Whether CYPA can be detected in sera of nasopharyngeal carcinoma (NPC) patients remains to be explored. Epstein-Barr virus (EBV) is the first identified human tumor virus and is a causative agent of NPC. The antibody of EBV capsid antigen immunoglobulin A (EBV-VCA-IgA) is a known biomarker of NPC, with a proportion of no more than 70% being detected positively. Hence, novel biomarkers need to be discovered for early diagnosis, prognosis, and monitoring of EBV-associated NPC. A total of 110 NPC and 36 normal control serum samples were collected. Exosomes from these samples were extracted. The mRNA and protein expression levels of the above samples were validated by reverse transcription -quantitative polymerase chain reaction, Western blotting, or enzyme-linked immunosorbent assay (ELISA). Finally, the results demonstrated that both the serum and exosomal CYPA levels of NPC patients were significantly higher than that of normal cases. In addition, exosomal CYPA had a much higher level than that in the whole sera. The positive rate of EBV-VCA-IgA antibody was 68.2% in NPC sera, and noticeably, among the cases with EBV-VCA-IgA negative, 80% of them presented high levels of CYPA above the standard (cutoff value). In particular, CYPA in exosomes was uniformly with higher significance than that in whole sera. Combined analysis of CYPA protein and EBV-VCA-IgA antibody showed a greatly higher discriminatory ability in diagnosis of NPC. Moreover, exosomal CYPA level had a positive correlation with that of the EBV-encoded latent membrane protein 1 (LMP1) in exosomes. EBV-positive cancer cells secreted significantly higher levels of exosomal CYPA. This study established the utility of circulating exosomal CYPA as a potential noninvasive diagnostic biomarker for EBV-associated NPC.

RGD Manual Disease Annotations    Click to see Annotation Detail View
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
nasopharynx carcinoma  IEP 150429622mRNA more ...RGD 
nasopharynx carcinoma  ISOPPIA (Homo sapiens)150429622; 150429622mRNA more ...RGD 

Objects Annotated

Genes (Rattus norvegicus)
Ppia  (peptidylprolyl isomerase A)

Genes (Mus musculus)
Ppia  (peptidylprolyl isomerase A)

Genes (Homo sapiens)
PPIA  (peptidylprolyl isomerase A)


Additional Information