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Erschienen in: Journal of Neuro-Oncology 3/2018

11.12.2017 | Laboratory Investigation

P21Waf1/Cip1 and p27Kip1 are correlated with the development and invasion of prolactinoma

verfasst von: Wei Dong, Jianhua Li, Qian Liu, Chunhui Liu, Chuzhong Li, Guidong Song, Haibo Zhu, Hua Gao, Yazhuo Zhang

Erschienen in: Journal of Neuro-Oncology | Ausgabe 3/2018

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Abstract

Cell cycle control can prevent excessive proliferative response in the pituitary homeostasis. Cyclin dependent kinases (Cdks) are modulated by cyclins or Cdk inhibitors, such as p21 and p27, which can regulate cell cycle progression from the G1 to S phases. This study was conducted to evaluate the levels and the promoter region methylation status of p21 and p27 in prolactinomas (PRL) and analyze their association with clinicopathologic features. We found high-p21 level cases were featured by 5/23 and H-scores 142.3 ± 23.7 in invasive-PRL specimens, and 19/25 and 221.3 ± 45.4 in non-invasive specimens (x2 = 14.11, p = 0.000), while high-p27 level cases were featured by 6/23 and H-scores 129.8 ± 31.1 in invasive-PRL specimens, and 18/25 and 197.1 ± 46.6 in non-invasive specimens (x2 = 10.11, p = 0.001). A similar trend was also observed for p21 and p27 protein levels in PRL specimens through western-blot (P < 0.01, respectively). The Ki-67 index was much higher in invasive specimens than in non-invasive specimens (x2 = 10.10, p = 0.001). Average 33 CpG sites per sample were analyzed by using MALDI-TOF Mass array, and 7/33 CpG sites methylation levels of p27 were higher than 50%. There existed significant differences in 4 CpG sites between invasive specimens and non-invasive specimens (p < 0.01). We found that D2 receptor was closely correlated with p21 levels (P < 0.05, r = 0.567) and p27 levels (P < 0.05, r = 0.591). In PRL, the deficiency in p21 and p27 contributed to the tumor proliferation and migration and Cdk inhibitors may be used as a new therapeutic approach.
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Metadaten
Titel
P21Waf1/Cip1 and p27Kip1 are correlated with the development and invasion of prolactinoma
verfasst von
Wei Dong
Jianhua Li
Qian Liu
Chunhui Liu
Chuzhong Li
Guidong Song
Haibo Zhu
Hua Gao
Yazhuo Zhang
Publikationsdatum
11.12.2017
Verlag
Springer US
Erschienen in
Journal of Neuro-Oncology / Ausgabe 3/2018
Print ISSN: 0167-594X
Elektronische ISSN: 1573-7373
DOI
https://doi.org/10.1007/s11060-017-2683-6

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