Abstract
Unopposed estrogen exposure is an important factor in the tumorigenesis of endometrial cancer. Nucleophosmin/B23 (NPM/B23), a phosphoprotein that has pleiotropic functions in cells, plays an important role in various cancers. However, the regulatory role of NPM/B23 in estrogen signaling in endometrial cancer has not been explored. Here, we report that NPM/B23 was required for estrogen-induced endometrial proliferation, and the increase in NPM/B23 was estrogen receptor α-dependent. Furthermore, estrogen increased NPM/B23 protein levels by repressing its ubiquitination and subsequently stabilizing the protein. The overexpression of the alternate reading frame (ARF) suppressed the estrogen-induced increase in the NPM/B23 protein levels, indicating that ARF inhibited the observed estrogen-mediated NPM/B23 stabilization. Our results suggest that one of the effects of estrogen on endometrial proliferation is the suppression of the NPM/B23–ARF interaction and the subsequent increase in NPM/B23 protein levels. This novel characterization of NPM/B23 in estrogen-mediated cell proliferation may extend our understanding of the tumorigenesis of steroid hormone-related cancers.
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References
Parkin DM, Bray F, Ferlay J, Pisani P (2005) Global cancer statistics, 2002. CA Cancer J Clin 55:74–108
Cancer Registry Annual Report, 2008 Taiwan. http://www.bhp.doh.gov.tw/BHPnet/Portal/StatisticsShow.aspx?No=200911300001
Hacker NF, Friedlander M (2009) Uterine cancer. In: Berek JS, Hacker NF (ed) Berek and Hacker’s gynecologic oncology, 5th edn. Lippincott Williams & Wilkins, Philadelphia, pp 895
Gross JM, Yee D (2002) How does the estrogen receptor work? Breast canc res 4:62–64
Lim MJ, Wang XW (2006) Nucleophosmin and human cancer. Canc Detect Prev 30:481–490
Okuwaki M (2008) The structure and functions of NPM1/nucleophosmin/B23, a multifunctional nucleolar acidic protein. J Biochem 143:441–448
Hsu CY, Yung BY (1998) Down-regulation of nucleophosmin/B23 during retinoic acid-induced differentiation of human promyelocytic leukemia HL-60 cells. Oncogene 16:915–923
Okuda M (2002) The role of nucleophosmin in centrosome duplication. Oncogene 21:6170–6174
Wu MH, Chang JH, Yung BY (2002) Resistance to UV-induced cell-killing in nucleophosmin/B23 over-expressed NIH 3T3 fibroblasts: enhancement of DNA repair and up-regulation of PCNA in association with nucleophosmin/B23 over-expression. Carcinogenesis 23:93–100
Li J, Zhang X, Sejas DP, Bagby GC, Pang Q (2004) Hypoxia-induced nucleophosmin protects cell death through inhibition of p53. J Biol Chem 279:41275–41279
Lin CY, Liang YC, Yung BY (2006) Nucleophosmin/B23 regulates transcriptional activation of E2F1 via modulating the promoter binding of NF-kappaB, E2F1 and pRB. Cell Signal 18:2041–2048
Shields LB, Gercel-Taylor C, Yashar CM, Wan TC, Katsanis WA, Spinnato JA, Taylor DD (1997) Induction of immune responses to ovarian tumor antigens by multiparity. J Soc Gynecol Investig 4:298–304
Pianta A, Puppin C, Franzoni A, Fabbro D, Di Loreto C, Bulotta S, Deganuto M, Paron I, Tell G, Puxeddu E et al (2010) Nucleophosmin is overexpressed in thyroid tumors. Biochem Biophys Res Commun 397:499–504
Tanaka M, Sasaki H, Kino I, Sugimura T, Terada M (1992) Genes preferentially expressed in embryo stomach are predominantly expressed in gastric cancer. Cancer Res 52:3372–3377
Nozawa Y, Van Belzen N, Van der Made AC, Dinjens WN, Bosman FT (1996) Expression of nucleophosmin/B23 in normal and neoplastic colorectal mucosa. J Pathol 178:48–52
Subong EN, Shue MJ, Epstein JI, Briggman JV, Chan PK, Partin AW (1999) Monoclonal antibody to prostate cancer nuclear matrix protein (PRO:4-216) recognizes nucleophosmin/B23. Prostate 39:298–304
Tsui KH, Cheng AJ, Chang PL, Pan TL, Yung BY (2004) Association of nucleophosmin/B23 mRNA expression with clinical outcome in patients with bladder carcinoma. Urology 64:839–844
Itahana K, Bhat KP, Jin A, Itahana Y, Hawke D, Kobayashi R, Zhang Y (2003) Tumor suppressor ARF degrades B23, a nucleolar protein involved in ribosome biogenesis and cell proliferation. Mol Cell 12:1151–1164
Colombo E, Bonetti P, Lazzerini Denchi E, Martinelli P, Zamponi R, Marine JC, Helin K, Falini B, Pelicci PG (2005) Nucleophosmin is required for DNA integrity and p19Arf protein stability. Mol Cell Biol 25:8874–8886
Lin CY, Tan BC, Liu H, Shih CJ, Chien KY, Lin CL, Yung BY (2010) Dephosphorylation of nucleophosmin by PP1beta facilitates pRB binding and consequent E2F1-dependent DNA repair. Mol Biol Cell 21:4409–4417
Skaar TC, Prasad SC, Sharareh S, Lippman ME, Brunner N, Clarke R (1998) Two-dimensional gel electrophoresis analyses identify nucleophosmin as an estrogen regulated protein associated with acquired estrogen-independence in human breast cancer cells. J Steroid Biochem Mol Biol 67:391–402
Zhu Y, Singh B, Hewitt S, Liu A, Gomez B, Wang A, Clarke R (2006) Expression patterns among interferon regulatory factor-1, human X-box binding protein-1, nuclear factor kappa B, nucleophosmin, estrogen receptor-alpha and progesterone receptor proteins in breast cancer tissue microarrays. Int J Oncol 28:67–76
Chao A, Tsai CL, Wei PC, Hsueh S, Chao AS, Wang CJ, Tsai CN, Lee YS, Wang TH, Lai CH (2010) Decreased expression of microRNA-199b increases protein levels of SET (protein phosphatase 2A inhibitor) in human choriocarcinoma. Cancer Lett 291:99–107
Chao A, Lin CY, Lee YS, Tsai CL, Wei PC, Hsueh S, Wu TI, Tsai CN, Wang CJ, Chao AS et al (2012) Regulation of ovarian cancer progression by microRNA-187 through targeting disabled homolog-2. Oncogene 31:764–775
Wang TH, Chao A, Tsai CL, Chang CL, Chen SH, Lee YS, Chen JK, Lin YJ, Chang PY, Wang CJ et al (2010) Stress-induced phosphoprotein 1 as a secreted biomarker for human ovarian cancer promotes cancer cell proliferation. Mol Cell Proteomics 9:1873–1884
Nishida M (2002) The Ishikawa cells from birth to the present. Hum Cell 15:104–117
El-Sahwi K, Bellone S, Cocco E, Cargnelutti M, Casagrande F, Bellone M, Abu-Khalaf M, Buza N, Tavassoli FA, Hui P et al (2010) In vitro activity of pertuzumab in combination with trastuzumab in uterine serous papillary adenocarcinoma. Br J Cancer 102:134–143
Chi XZ, Kim J, Lee YH, Lee JW, Lee KS, Wee H, Kim WJ, Park WY, Oh BC, Stein GS et al (2009) Runt-related transcription factor RUNX3 is a target of MDM2-mediated ubiquitination. Cancer Res 69:8111–8119
Grisendi S, Mecucci C, Falini B, Pandolfi PP (2006) Nucleophosmin and cancer. Nat Rev Cancer 6:493–505
Yeh CW, Huang SS, Lee RP, Yung BY (2006) Ras-dependent recruitment of c-Myc for transcriptional activation of nucleophosmin/B23 in highly malignant U1 bladder cancer cells. Mol Pharmacol 70:1443–1453
Tawfic S, Olson MO, Ahmed K (1995) Role of protein phosphorylation in post-translational regulation of protein B23 during programmed cell death in the prostate gland. J Biol Chem 270:21009–21015
Chan PK (1992) Characterization and cellular localization of nucleophosmin/B23 in HeLa cells treated with selected cytotoxic agents (studies of B23-translocation mechanism). Exp Cell Res 203:174–181
Enomoto T, Lindstrom MS, Jin A, Ke H, Zhang Y (2006) Essential role of the B23/NPM core domain in regulating ARF binding and B23 stability. J Biol Chem 281:18463–18472
Liu X, Liu Z, Jang SW, Ma Z, Shinmura K, Kang S, Dong S, Chen J, Fukasawa K, Ye K (2007) Sumoylation of nucleophosmin/B23 regulates its subcellular localization, mediating cell proliferation and survival. Proc Natl Acad Sci U S A 104:9679–9684
Tago K, Chiocca S, Sherr CJ (2005) Sumoylation induced by the Arf tumor suppressor: a p53-independent function. Proc Natl Acad Sci U S A 102:7689–7694
Acknowledgments
This study was supported by grants from the Chang Gung Medical Research Foundation (CMRPG390202) and the Department of Health (DOH99-TD-B-111-005; DOH99-TD-C-111-006).
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The authors declare no conflict of interest.
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Angel Chao and Chiao-Yun Lin contributed equally to this work.
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Chao, A., Lin, CY., Tsai, CL. et al. Estrogen stimulates the proliferation of human endometrial cancer cells by stabilizing nucleophosmin/B23 (NPM/B23). J Mol Med 91, 249–259 (2013). https://doi.org/10.1007/s00109-012-0950-8
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DOI: https://doi.org/10.1007/s00109-012-0950-8