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Elementary studies on elevated steroidogenic factor-1 expression in aldosterone-producing adenoma.
MedLine Citation:
PMID:  20875752     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
OBJECTIVES: The expression of steroidogenic factor-1 (SF-1) was elevated in adrenal aldosterone-producing adenoma (APA). The influence of SF-1 on adrenal tumorigenesis by adrenocortical cell line H295R cells was investigated.
MATERIALS AND METHODS: Real-time PCR and Western blotting were used to detect SF-1 expression in 16 APA samples and 12 normal adrenal samples. Specific SF-1-shRNA plasmid was transfected into H295R cells to inhibit SF-1 expression. Western blotting and real-time PCR were used to verify the effects of RNAi on SF-1 inhibition. Subsequently, WST-1 and cell count were applied to evaluate cell proliferation at different SF-1 levels. Terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) staining was used to measure cell apoptosis, and proliferation marker Ki-67 was studied by immunohistochemistry.
RESULTS: Compared with normal adrenal samples, SF-1 mRNA and protein levels in APA samples were significantly higher. It was 10.48:1 at SF-1 mRNA and 0.87 ± 0.05 vs. 0.39 ± 0.07 at protein levels, respectively (P < 0.01). A decreased SF-1 significantly inhibited cell proliferation in the experimental and control cells. These results were supported by weaker Ki-67 staining in SF-1-inhibited cells [(36.9% ± 4.17%) vs. (58.48% ± 7.16%) (P < 0.01)]. Moreover, SF-1 inhibition induced a 2.7-fold increase in the percentage of apoptotic H295R cells (P < 0.01).
CONCLUSIONS: Elevated SF-1 may play an important role in APA formation and primary aldosteronism. SF-1 acts as an oncogenic factor, and its inhibition provides new insight into the understanding and treatment of related adrenal diseases.
Authors:
Dongliang Hu; Jinzhi Ouyang; Zhun Wu; Taoping Shi; Baojun Wang; Xin Ma; Hongzhao Li; Shaogang Wang; Xu Zhang
Publication Detail:
Type:  Journal Article     Date:  2010-09-26
Journal Detail:
Title:  Urologic oncology     Volume:  30     ISSN:  1873-2496     ISO Abbreviation:  Urol. Oncol.     Publication Date:  2012 Jul 
Date Detail:
Created Date:  2012-06-29     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9805460     Medline TA:  Urol Oncol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  457-62     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 Elsevier Inc. All rights reserved.
Affiliation:
Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
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