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  • Nie, HuizhenShanghai Jiao Tong University (author)

The short isoform of PRLR suppresses the pentose phosphate pathway and nucleotide synthesis through the NEK9-Hippo axis in pancreatic cancer

  • Article/chapterEnglish2021

Publisher, publication year, extent ...

  • Ivyspring International Publisher,2021

Numbers

  • LIBRIS-ID:oai:lup.lub.lu.se:2efed634-78b1-49aa-8246-f7be9158e427
  • https://lup.lub.lu.se/record/2efed634-78b1-49aa-8246-f7be9158e427URI
  • https://doi.org/10.7150/thno.51712DOI

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  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • Prolactin binding to the prolactin receptor exerts pleiotropic biological effects in vertebrates. The prolactin receptor (PRLR) has multiple isoforms due to alternative splicing. The biological roles and related signaling of the long isoform (PRLR-LF) have been fully elucidated. However, little is known about the short isoform (PRLR-SF), particularly in cancer development and metabolic reprogramming, a core hallmark of cancer. Here, we reveal the role and underlying mechanism of PRLR-SF in pancreatic ductal adenocarcinoma (PDAC). Methods: A human PDAC tissue array was used to investigate the clinical relevance of PRLR in PDAC. The in vivo implications of PRLR-SF in PDAC were examined in a subcutaneous xenograft model and an orthotopic xenograft model. Immunohistochemistry was performed on tumor tissue obtained from genetically engineered KPC (KrasG12D/+; Trp53R172H/+; Pdx1-Cre) mice with spontaneous tumors. 13C-labeled metabolite measures, LC-MS, EdU incorporation assays and seahorse analyses were used to identify the effects of PRLR-SF on the pentose phosphate pathway and glycolysis. We identified the molecular mechanisms by immunofluorescence, coimmunoprecipitation, proximity ligation assays, chromatin immunoprecipitation and promoter luciferase activity. Public databases (TCGA, GEO and GTEx) were used to analyze the expression and survival correlations of the related genes. Results: We demonstrated that PRLR-SF is predominantly expressed in spontaneously forming pancreatic tumors of genetically engineered KPC mice and human PDAC cell lines. PRLR-SF inhibits the proliferation of PDAC cells (AsPC-1 and BxPC-3) in vitro and tumor growth in vivo. We showed that PRLR-SF reduces the expression of genes in the pentose phosphate pathway (PPP) and nucleotide biosynthesis by activating Hippo signaling. TEAD1, a downstream transcription factor of Hippo signaling, directly regulates the expression of G6PD and TKT, which are PPP rate-limiting enzymes. Moreover, NEK9 directly interacts with PRLR-SF and is the intermediator between PRLR and the Hippo pathway. The PRLR expression level is negatively correlated with overall survival and TNM stage in PDAC patients. Additionally, pregnancy and lactation increase the ratio of PRLR-SF:PRLR-LF in the pancreas of wild-type mice and subcutaneous PDAC xenograft tumors. Conclusion: Our characterization of the relationship between PRLR-SF signaling, the NEK9-Hippo pathway, PPP and nucleotide synthesis explains a mechanism for the correlation between PRLR-SF and metabolic reprogramming in PDAC progression. Strategies to alter this pathway might be developed for the treatment or prevention of pancreatic cancer.

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Added entries (persons, corporate bodies, meetings, titles ...)

  • Huang, Pei-QiShanghai Jiao Tong University (author)
  • Jiang, Shu-HengShanghai Jiao Tong University (author)
  • Yang, QinShanghai Jiao Tong University (author)
  • Hu, Li-PengShanghai Jiao Tong University (author)
  • Yang, Xiao-MeiShanghai Jiao Tong University (author)
  • Li, JunShanghai Jiao Tong University (author)
  • Wang, Ya-HuiShanghai Jiao Tong University (author)
  • Li, QingShanghai Jiao Tong University(Swepub:lu)ener-qgl (author)
  • Zhang, Yi-FanShanghai Jiao Tong University (author)
  • Zhu, LeiShanghai Jiao Tong University (author)
  • Zhang, Yan-LiShanghai Jiao Tong University(Swepub:lu)ya1505zh (author)
  • Yu, YanqiuChina Medical University, Shenyang (author)
  • Xiao, Gary GuishanCreighton University,Dalian University of Technology (author)
  • Sun, Yong-WeiShanghai Jiao Tong University (author)
  • Ji, JianguangLund University,Lunds universitet,Allmänmedicin och klinisk epidemiologi,Forskargrupper vid Lunds universitet,LUCC: Lunds universitets cancercentrum,Övriga starka forskningsmiljöer,Family Medicine and Clinical Epidemiology,Lund University Research Groups,LUCC: Lund University Cancer Centre,Other Strong Research Environments(Swepub:lu)med-jji (author)
  • Zhang, Zhi-GangShanghai Jiao Tong University(Swepub:lu)eit-zza (author)
  • Shanghai Jiao Tong UniversityChina Medical University, Shenyang (creator_code:org_t)

Related titles

  • In:Theranostics: Ivyspring International Publisher11:8, s. 3898-39151838-7640

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