title: Up-regulation of CacyBP/SIP during rat breast cancer development.
abstract: BACKGROUND
  CacyBP/SIP (calcyclin binding protein/Siah-1 interacting protein) was originally discovered in Ehrlich ascities tumor cells but was later found also in many different tumors.
  
  
  METHODS
  To better understand the function of CacyBP/SIP in carcinogenesis, we used immunohistochemistry, Western blotting, and RT-PCR assays to study the distribution and level of CacyBP/SIP in mammary tissues after tumor induction in rat with DMBA [(dimethylbenz[a]anthracene)]. Application of such a model allowed us to monitor changes in CacyBP/SIP level during development of breast cancer.
  
  
  RESULTS
  We found that both the protein and mRNA levels of CacyBP/SIP gradually increased in pathologically changed tissues and were highest in tumors taken 8 weeks after DMBA treatment. Similar changes as for CacyBP/SIP were detected in the level of β-catenin.
  
  
  CONCLUSIONS
  Increase in CacyBP/SIP expression during development of breast cancer, observed early in the mammary tissues with only minimal pathological changes, might suggest an important role of this protein in the process of carcinogenesis.
authors.affiliation: Nencki Institute of Experimental Biology, 3 Pasteur Street, 02-093, Warsaw, Poland.
authors.forename: Ewa
authors.initials: E
authors.lastname: Kilańczyk
authors.forename: Krzysztof
authors.initials: K
authors.lastname: Gwoździński
authors.forename: Ewa
authors.initials: E
authors.lastname: Wilczek
authors.forename: Anna
authors.initials: A
authors.lastname: Filipek
mesh_terms: D015127:9,10-Dimethyl-1,2-benzanthracene / Q000633:toxicity; D000818:Animals; D005260:Female; D047908:Intracellular Signaling Peptides and Proteins / Q000235:genetics / Q000378:metabolism*; D008325:Mammary Neoplasms, Experimental / Q000139:chemically induced / Q000378:metabolism* / Q000473:pathology*; D017207:Rats, Sprague-Dawley; D015854:Up-Regulation; D051176:beta Catenin / Q000378:metabolism
chemical_list: C491777:CacyBP protein, rat; C495268:Ctnnb1 protein, rat; D047908:Intracellular Signaling Peptides and Proteins; D051176:beta Catenin; D015127:9,10-Dimethyl-1,2-benzanthracene