Dataset Information
Expression of Glutamine Metabolism-Related and Amino Acid Transporter Proteins in Adrenal Cortical Neoplasms and Pheochromocytomas.
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ABSTRACT: Background
Glutamine metabolism is considered an important metabolic phenotype of proliferating tumor cells.Objective
The objective of this study was to investigate the expression of glutamine metabolism-related and amino acid transporter proteins in adrenal cortical neoplasms (ACNs) and pheochromocytomas (PCCs) in the adrenal gland.Methods
A tissue microarray was constructed for 132 cases of ACN (115 cases of adrenal cortical adenoma and 17 cases of adrenal cortical carcinoma) and 189 cases of PCC. Immunohistochemical staining for glutamine metabolism-related proteins GLS1 and GDH and amino acid transporter proteins SLC1A5, SLC7A5, and SLC7A11 as well as SDHB was performed and compared with clinicopathologic parameters.Results
The expression levels of GLS (p < 0.001), SLC7A5 (p = 0.049), and SDHB (p = 0.007) were higher in ACN than in PCC, whereas the expression levels of SLC1A5 (p < 0.001) and SLC7A11 (p < 0.001) were higher in PCC than in ACN. In ACN, GLS positivity was associated with a higher Fuhrman grade (p = 0.009), and SLC1A5 positivity was associated with SDHB positivity (p = 0.004) and a clear cell proportion < 25% (p = 0.010). SDHB negativity was also associated with tumor cell necrosis (p = 0.007). In PCC, SLC7A11 positivity was associated with nonnorepinephrine type (p = 0.008). In Kaplan-Meier analysis, patients with GLS positivity (p = 0.039) and SDHB negativity (p = 0.005) had significantly shorter overall survival in ACN. In PCC patients with a GAPP?score ? 3, GLS positivity (p = 0.001) and SDHB positivity (p = 0.001) were associated with shorter disease-free survival, whereas GLS positivity (p = 0.004) was also associated with shorter overall survival.Conclusions
The expression of glutamine metabolism-related and amino acid transporter proteins in ACN and PCC is distinct and associated with prognosis.
SUBMITTER: Kim HM
PROVIDER: S-EPMC7806379 | biostudies-literature | 2021
REPOSITORIES: biostudies-literature
Publications
Expression of Glutamine Metabolism-Related and Amino Acid Transporter Proteins in Adrenal Cortical Neoplasms and Pheochromocytomas.
Disease markers 20210105
<h4>Background</h4>Glutamine metabolism is considered an important metabolic phenotype of proliferating tumor cells.<h4>Objective</h4>The objective of this study was to investigate the expression of glutamine metabolism-related and amino acid transporter proteins in adrenal cortical neoplasms (ACNs) and pheochromocytomas (PCCs) in the adrenal gland.<h4>Methods</h4>A tissue microarray was constructed for 132 cases of ACN (115 cases of adrenal cortical adenoma and 17 cases of adrenal cortical carc ...[more]