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Inhibition of PRL2 Upregulates PTEN and Attenuates Tumor Growth in Tp53-deficient Sarcoma and Lymphoma Mouse Models.

Frederick Nguele Meke | Yunpeng Bai | Diego Ruiz-Avila | Colin Carlock | Jinan Ayub | Jinmin Miao | Yanyang Hu | Qinglin Li | Zhong-Yin Zhang
Cancer research communications | 2024

The phosphatases of regenerating liver (PRL) are oncogenic when overexpressed. We previously found that PRL2 deletion increases PTEN, decreases Akt activity, and suppresses tumor development in a partial Pten-deficient mouse model. The current study aims to further establish the mechanism of PTEN regulation by PRL2 and expand the therapeutic potential for PTEN augmentation mediated by PRL2 inhibition in cancers initiated without PTEN alteration. The TP53 gene is the most mutated tumor suppressor in human cancers, and heterozygous or complete deletion of Tp53 in mice leads to the development of sarcomas and thymic lymphomas, respectively. There remains a lack of adequate therapies for the treatment of cancers driven by Tp53 deficiency or mutations. We show that Prl2 deletion leads to PTEN elevation and attenuation of Akt signaling in sarcomas and lymphomas developed in Tp53 deficiency mouse models. This results in increased survival and reduced tumor incidence because of impaired tumor cell proliferation. In addition, inhibition of PRL2 with a small-molecule inhibitor phenocopies the effect of genetic deletion of Prl2 and reduces Tp53 deficiency-induced tumor growth. Taken together, the results further establish PRL2 as a negative regulator of PTEN and highlight the potential of PRL2 inhibition for PTEN augmentation therapy in cancers with wild-type PTEN expression.

Pubmed ID: 38047587 RIS Download

Research resources used in this publication

Antibodies used in this publication

Associated grants

  • Agency: NCI NIH HHS, United States
    Id: P30 CA023168
  • Agency: NCI NIH HHS, United States
    Id: R01 CA069202

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RRID:SCR_016137

Software application with data analysis tools and spreadsheet templates to track and visualize data. It is used to manage and process data.

View all literature mentions

ImageJ (software resource)

RRID:SCR_003070

Open source Java based image processing software program designed for scientific multidimensional images. ImageJ has been transformed to ImageJ2 application to improve data engine to be sufficient to analyze modern datasets.

View all literature mentions

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RRID:SCR_003193

Project exploring the spectrum of genomic changes involved in more than 20 types of human cancer that provides a platform for researchers to search, download, and analyze data sets generated. As a pilot project it confirmed that an atlas of changes could be created for specific cancer types. It also showed that a national network of research and technology teams working on distinct but related projects could pool the results of their efforts, create an economy of scale and develop an infrastructure for making the data publicly accessible. Its success committed resources to collect and characterize more than 20 additional tumor types. Components of the TCGA Research Network: * Biospecimen Core Resource (BCR); Tissue samples are carefully cataloged, processed, checked for quality and stored, complete with important medical information about the patient. * Genome Characterization Centers (GCCs); Several technologies will be used to analyze genomic changes involved in cancer. The genomic changes that are identified will be further studied by the Genome Sequencing Centers. * Genome Sequencing Centers (GSCs); High-throughput Genome Sequencing Centers will identify the changes in DNA sequences that are associated with specific types of cancer. * Proteome Characterization Centers (PCCs); The centers, a component of NCI's Clinical Proteomic Tumor Analysis Consortium, will ascertain and analyze the total proteomic content of a subset of TCGA samples. * Data Coordinating Center (DCC); The information that is generated by TCGA will be centrally managed at the DCC and entered into the TCGA Data Portal and Cancer Genomics Hub as it becomes available. Centralization of data facilitates data transfer between the network and the research community, and makes data analysis more efficient. The DCC manages the TCGA Data Portal. * Cancer Genomics Hub (CGHub); Lower level sequence data will be deposited into a secure repository. This database stores cancer genome sequences and alignments. * Genome Data Analysis Centers (GDACs) - Immense amounts of data from array and second-generation sequencing technologies must be integrated across thousands of samples. These centers will provide novel informatics tools to the entire research community to facilitate broader use of TCGA data. TCGA is actively developing a network of collaborators who are able to provide samples that are collected retrospectively (tissues that had already been collected and stored) or prospectively (tissues that will be collected in the future).

View all literature mentions

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RRID:SCR_008520

Software for single-cell flow cytometry analysis. Its functions include management, display, manipulation, analysis and publication of the data stream produced by flow and mass cytometers.

View all literature mentions

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RRID:AB_2099233

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RRID:AB_11153580

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p-4E-BP1/2/3 (A-10) (antibody)

RRID:AB_10709575

This monoclonal targets p-4E-BP1/2/3 (A-10)

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4E-BP1 (P-1) (antibody)

RRID:AB_626621

This monoclonal targets 4E-BP1 (P-1)

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cyclin D1 (DCS-6) (antibody)

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This monoclonal targets CCND1

View all literature mentions

Bax Antibody (antibody)

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RRID:AB_2315112

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View all literature mentions

Phospho-GSK-3alpha/beta (Ser21/9) Antibody (antibody)

RRID:AB_329830

This polyclonal targets Phospho-GSK-3alpha/beta (Ser21/9)

View all literature mentions

GSK-3alpha/beta (D75D3) XP Rabbit mAb (antibody)

RRID:AB_10547140

This monoclonal targets GSK-3alpha/beta

View all literature mentions

FoxO1 (C29H4) Rabbit mAb (antibody)

RRID:AB_2106495

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PCNA (PC10) Mouse mAb (antibody)

RRID:AB_2160343

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View all literature mentions

Phospho-Bad (Ser136) (D25H8) Rabbit mAb (antibody)

RRID:AB_10547878

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View all literature mentions

Caspase-3 (D3R6Y) Rabbit mAb (antibody)

RRID:AB_2798429

This monoclonal targets CASP3

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PARP Antibody (antibody)

RRID:AB_2160739

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View all literature mentions

Anti-β-Actin Antibody (C4) (antibody)

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