RGD Reference Report - Expression of placental leucine aminopeptidase is associated with a poor outcome in endometrial endometrioid adenocarcinoma. - Rat Genome Database

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Expression of placental leucine aminopeptidase is associated with a poor outcome in endometrial endometrioid adenocarcinoma.

Authors: Shibata, K  Kikkawa, F  Suzuki, Y  Mizokami, Y  Kajiyama, H  Ino, K  Nomura, S  Nagasaka, T  Mizutani, S 
Citation: Shibata K, etal., Oncology. 2004;66(4):288-95.
RGD ID: 2314922
Pubmed: (View Article at PubMed) PMID:15218296
DOI: Full-text: DOI:10.1159/000078329

OBJECTIVE: Placental leucine aminopeptidase (P-LAP) is a cell surface aminopeptidase (oxytocinase). We cloned P-LAP cDNA and found a widespread tissue distribution of P-LAP. Since P-LAP can degrade several small peptide hormones such as oxytocin, this enzyme may affect many cellular functions of carcinoma cells as well as normal cells. This study investigated whether the expression of P-LAP correlates with clinicopathologic factors and prognosis in patients with endometrial endometrioid adenocarcinoma. METHODS: Histologic sections of formalin-fixed, paraffin-embedded specimens from 99 primary endometrial carcinomas were stained for P-LAP using polyclonal P-LAP antibody. Disease-free survival and other clinicopathologic characteristics were analyzed according to the intensity of P-LAP staining. RESULTS: Of 99 cases, 69 (69.7%) showed specific P-LAP immunostaining. We found a positive correlation between the expression of P-LAP and histological grade (p < 0.01), surgical stage of the disease (p = 0.02), myometrial invasion (p = 0.01), lymph node involvement (p < 0.01), and vascular infiltration (p < 0.01). In patients who had strongly positive P-LAP staining, the disease-free interval was significantly lower than in patients who had negative or weakly positive P-LAP staining (p < 0.01). Multivariate analysis demonstrated that strongly immunoreactive P-LAP (odds ratio, 12.8; 95% confidence interval, 2.84-58.8; p < 0.01) and surgical stage (odds ratio, 8.78; 95% confidence interval, 2.77-27.8; p < 0.01) are independent prognostic factors. CONCLUSIONS: This study suggests P-LAP as an independent prognosticator of clinical outcome in patients with endometrial carcinoma. Therefore, assessment of the P-LAP status provides clinically useful prognostic information in patients with endometrial carcinoma.


Disease Annotations    

Objects Annotated

Genes (Rattus norvegicus)
Lnpep  (leucyl and cystinyl aminopeptidase)

Genes (Mus musculus)
Lnpep  (leucyl/cystinyl aminopeptidase)

Genes (Homo sapiens)
LNPEP  (leucyl and cystinyl aminopeptidase)

Additional Information