SATB1 is Down-regulated in Clear Cell Renal Cell Carcinoma and Correlates with miR-21-5p Overexpression and Poor Prognosis.
BACKGROUND
Altered expression of special AT-rich sequence binding protein 1 (SATB1) was reported in several types of human cancers. This study aimed to determine the expression levels of SATB1, as well as miR-21-5p -the post-transcriptional repressor of SATB1 expression- in clear cell renal cell carcinoma (ccRCC) and to investigate their association with the progression of ccRCC.


METHODS
Immunohistochemistry and quantitative polymerase chain reaction were used to assess the expression of SATB1 protein and mRNA as well as miR-21-5p in tumor and matched normal kidney tissues collected from 56 ccRCC patients.


RESULTS
Nuclear SATB1 immunoreactivity was elevated in ccRCC cells while its cytoplasmic expression was decreased. SATB1 mRNA level was down-regulated in ccRCC tissue and inversely correlated with the content of miR-21-5p. Down-regulation of SATB1 mRNA and up-regulation of miR-21-5p were associated with shorter patient survival.


CONCLUSIONS
Decreased expression of SATB1 in ccRCC may result from over-expressed miR-21-5p. Our data suggest that SATB1 may have a potential value as a prognostic marker in ccRCC.
Department of Human Histology and Embryology, Faculty of Medical Sciences, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland a.kowalczyk@uwm.edu.pl.
Anna E
AE
Kowalczyk
Department of Human Histology and Embryology, Faculty of Medical Sciences, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland.
Bartlomiej E
BE
Krazinski
Department of Human Histology and Embryology, Faculty of Medical Sciences, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland.
Janusz
J
Godlewski
Department of Histology and Embryology, Wroclaw Medical University, Wroclaw, Poland.
Jedrzej
J
Grzegrzolka
Department of Human Histology and Embryology, Faculty of Medical Sciences, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland.
Jolanta
J
Kiewisz
Department of Human Histology and Embryology, Faculty of Medical Sciences, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland.
Przemyslaw
P
Kwiatkowski
Department of Human Histology and Embryology, Faculty of Medical Sciences, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland.
Agnieszka
A
Sliwinska-Jewsiewicka
Department of Histology and Embryology, Wroclaw Medical University, Wroclaw, Poland Department of Physiotherapy, Wroclaw University School of Physical Education, Wroclaw, Poland.
Piotr
P
Dziegiel
Department of Human Histology and Embryology, Faculty of Medical Sciences, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland Department of Histology, Medical University of Gdansk, Gdansk, Poland.
Zbigniew
Z
Kmiec
D000328:Adult; D000368:Aged; D002292:Carcinoma, Renal Cell / Q000235:genetics* / Q000401:mortality* / Q000473:pathology; D015536:Down-Regulation; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D007150:Immunohistochemistry; D053208:Kaplan-Meier Estimate; D007680:Kidney Neoplasms / Q000235:genetics* / Q000401:mortality* / Q000473:pathology; D008297:Male; D036961:Matrix Attachment Region Binding Proteins / Q000235:genetics*; D035683:MicroRNAs / Q000235:genetics*; D008875:Middle Aged; D060787:Neoplasm Grading; D009362:Neoplasm Metastasis; D009367:Neoplasm Staging; D011379:Prognosis; D016016:Proportional Hazards Models; D021381:Protein Transport; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism
C524940:MIRN21 microRNA, human; D036961:Matrix Attachment Region Binding Proteins; D035683:MicroRNAs; D012333:RNA, Messenger; C076189:SATB1 protein, human
IHC; SATB1 expression; clear cell renal cell carcinoma; clinicopathological parameters; miR-21-5p; qPCR; survival