RGD Reference Report - Cyclooxygenase-2 and microsomal prostaglandin E synthase-1 are overexpressed in squamous cell carcinoma of the penis. - Rat Genome Database

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Cyclooxygenase-2 and microsomal prostaglandin E synthase-1 are overexpressed in squamous cell carcinoma of the penis.

Authors: Golijanin, D  Tan, JY  Kazior, A  Cohen, EG  Russo, P  Dalbagni, G  Auborn, KJ  Subbaramaiah, K  Dannenberg, AJ 
Citation: Golijanin D, etal., Clin Cancer Res. 2004 Feb 1;10(3):1024-31.
RGD ID: 2300087
Pubmed: PMID:14871981   (View Abstract at PubMed)

PURPOSE: Prostaglandin E2 (PGE2) promotes malignant growth. Cyclooxygenase (COX) catalyzes the synthesis of PGH2, which is converted, in turn, by microsomal prostaglandin E synthase (mPGES-1) to PGE2. One strategy for inhibiting carcinogenesis is to prevent PGE2 production in premalignant and malignant tissues. It is important, therefore, to determine whether enzymes involved in PGE2 biosynthesis are deregulated in neoplasia. The main purpose of this study was to determine whether amounts of COX-2 or mPGES-1 were increased in intraepithelial neoplasia or squamous cell carcinoma (SCC) of the penis. Because human papillomavirus (HPV) has been linked to the development of penile SCC, a secondary objective was to determine whether COX-2 was overexpressed in SCC arising in an HPV16 transgenic mouse. EXPERIMENTAL DESIGN: Immunohistochemistry and immunoblotting were used to evaluate the expression of COX-2 and mPGES-1 in benign and malignant lesions including metastases to lymph nodes. Amounts of intratumoral PGE2 were quantified by enzyme immunoassay. Reverse transcription-PCR was used to determine the expression of each of the four known receptors (EP(1-4)) for PGE2. RESULTS: Immunohistochemistry demonstrated increased expression of COX-2 and mPGES-1 in dysplasia, carcinoma in situ, invasive SCC, and metastases to lymph nodes. Immunoblot analysis confirmed that COX-2 and mPGES-1 were consistently overexpressed in SCC. PGE2 and all four of the PGE2 receptor subtypes were detected in each of the tumor samples. Elevated levels of COX-2 were also detected in SCC arising in an HPV16 transgenic mouse. CONCLUSIONS: Increased amounts of COX-2 and mPGES-1 were detected in penile intraepithelial neoplasia and carcinoma. These findings provide the basis for evaluating whether inhibiting COX-2 will be useful in the prevention or treatment of penile SCC.



RGD Manual Disease Annotations    Click to see Annotation Detail View

  
Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
PTGESHumanin situ carcinoma  IEP protein:increased expression:penis and skinRGD 
PtgesRatin situ carcinoma  ISOPTGES (Homo sapiens)protein:increased expression:penis and skinRGD 
PtgesMousein situ carcinoma  ISOPTGES (Homo sapiens)protein:increased expression:penis and skinRGD 
PTGESHumanpenile benign neoplasm  IEP protein:increased expression:penis and skinRGD 
PtgesRatpenile benign neoplasm  ISOPTGES (Homo sapiens)protein:increased expression:penis and skinRGD 
PtgesMousepenile benign neoplasm  ISOPTGES (Homo sapiens)protein:increased expression:penis and skinRGD 

Objects Annotated

Genes (Rattus norvegicus)
Ptges  (prostaglandin E synthase)

Genes (Mus musculus)
Ptges  (prostaglandin E synthase)

Genes (Homo sapiens)
PTGES  (prostaglandin E synthase)


Additional Information