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Expression of sarcosine metabolism-related proteins in invasive lobular carcinoma: comparison to invasive ductal carcinoma

 Yoon Jin Cha  ;  Woo Hee Jung  ;  Nam Hoon Cho  ;  Ja Seung Koo 
 Yonsei Medical Journal, Vol.56(3) : 598-607, 2015 
Journal Title
 Yonsei Medical Journal 
Issue Date
Adult ; Breast/pathology ; Breast Neoplasms/metabolism* ; Breast Neoplasms/pathology ; Carcinoma, Ductal, Breast/metabolism* ; Carcinoma, Ductal, Breast/pathology ; Carcinoma, Lobular/metabolism* ; Female ; Humans ; Immunohistochemistry ; Middle Aged ; Multivariate Analysis ; Phenotype ; Proportional Hazards Models ; Regression Analysis ; Retrospective Studies ; Sarcosine/genetics ; Sarcosine/metabolism* ; Tissue Array Analysis
Breast cancer ; lobular cancer ; sarcosine
PURPOSE: The aims of this study were to compare the expression of sarcosine metabolism-related proteins between invasive lobular carcinoma (ILC) and invasive ductal carcinoma (IDC) and to determine the implications of these results. MATERIALS AND METHODS: Tissue microarrays were constructed, containing 30 samples from normal breast tissue, 114 samples from patients with ILC, and 692 samples from patients with IDC. Immunohistochemical staining was performed to examine the expression of sarcosine metabolism-related proteins [glycine N-methyltransferase, sarcosine dehydrogenase, and l-pipecolic acid oxidase (PIPOX)]. RESULTS: The sarcosine metabolic phenotype differed between ILC and IDC (p<0.001). In IDC, sarcosine metabolic phenotype was distributed as null type (61.7%)>low sarcosine type (30.4%)>high sarcosine type (5.0%)>intermediate type (2.9%). However, in ILC, the sarcosine metabolic phenotype was distributed as low sarcosine type (61.4%)>null type (32.5%)>intermediate type (5.3%)>high sarcosine type (0.9%). PIPOX showed higher expression in ILC than in IDC (p<0.001) and correlated with androgen receptor (AR) positivity (p=0.001) in ILC. CONCLUSION: Expression of sarcosine metabolism-related proteins differed between ILC and IDC. Low sarcosine type was the majority sarcosine metabolic phenotype of ILC. PIPOX expression was predominant in ILC and correlated with AR positivity.
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1. College of Medicine (의과대학) > Dept. of Pathology (병리학교실) > 1. Journal Papers
Yonsei Authors
Koo, Ja Seung(구자승) ORCID logo https://orcid.org/0000-0003-4546-4709
Jung, Woo Hee(정우희)
Cho, Nam Hoon(조남훈) ORCID logo https://orcid.org/0000-0002-0045-6441
Cha, Yoon Jin(차윤진) ORCID logo https://orcid.org/0000-0002-5967-4064
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