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Inhibition of Nuclear PTEN Tyrosine Phosphorylation Enhances Glioma Radiation Sensitivity through Attenuated DNA Repair.

Cancer cell | 2019

Ionizing radiation (IR) and chemotherapy are standard-of-care treatments for glioblastoma (GBM) patients and both result in DNA damage, however, the clinical efficacy is limited due to therapeutic resistance. We identified a mechanism of such resistance mediated by phosphorylation of PTEN on tyrosine 240 (pY240-PTEN) by FGFR2. pY240-PTEN is rapidly elevated and bound to chromatin through interaction with Ki-67 in response to IR treatment and facilitates the recruitment of RAD51 to promote DNA repair. Blocking Y240 phosphorylation confers radiation sensitivity to tumors and extends survival in GBM preclinical models. Y240F-Pten knockin mice showed radiation sensitivity. These results suggest that FGFR-mediated pY240-PTEN is a key mechanism of radiation resistance and is an actionable target for improving radiotherapy efficacy.

Pubmed ID: 30827889 RIS Download

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Antibodies used in this publication

Associated grants

  • Agency: NHLBI NIH HHS, United States
    Id: P01 HL107150
  • Agency: NCI NIH HHS, United States
    Id: P30 CA016672
  • Agency: NINDS NIH HHS, United States
    Id: R01 NS097649
  • Agency: NIGMS NIH HHS, United States
    Id: R01 GM116897
  • Agency: NCI NIH HHS, United States
    Id: P50 CA127001
  • Agency: NCI NIH HHS, United States
    Id: P30 CA023100
  • Agency: NIGMS NIH HHS, United States
    Id: R01 GM026017
  • Agency: NIH HHS, United States
    Id: S10 OD023498
  • Agency: NINDS NIH HHS, United States
    Id: R01 NS080939

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UniProt (tool)

RRID:SCR_002380

Collection of data of protein sequence and functional information. Resource for protein sequence and annotation data. Consortium for preservation of the UniProt databases: UniProt Knowledgebase (UniProtKB), UniProt Reference Clusters (UniRef), and UniProt Archive (UniParc), UniProt Proteomes. Collaboration between European Bioinformatics Institute (EMBL-EBI), SIB Swiss Institute of Bioinformatics and Protein Information Resource. Swiss-Prot is a curated subset of UniProtKB.

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Anti-ATR, phospho (Ser428) Antibody, Unconjugated (antibody)

RRID:AB_2290281

This polyclonal targets ATR, phospho (Ser428)

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MEK1/2 (D1A5) Rabbit mAb (antibody)

RRID:AB_10829473

This monoclonal targets MEK1/2 (D1A5) Rabbit mAb

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HDAC2 Antibody (antibody)

RRID:AB_2116822

This unknown targets HDAC2

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SUMO-2/3 (18H8) Rabbit mAb (antibody)

RRID:AB_2198425

This monoclonal targets SUMO-2/3

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Phospho-p44/42 MAPK (Erk1/2) (Thr202/Tyr204) (20G11) Rabbit mAb (antibody)

RRID:AB_331772

This monoclonal targets Phospho-p44/42 MAPK (Erk1/2) (Thr202/Tyr204)

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Phospho-S6 Ribosomal Protein (Ser235/236) (D57.2.2E) XP Rabbit mAb (antibody)

RRID:AB_916156

This monoclonal targets Phospho-S6 Ribosomal Protein (Ser235/236) (D57.2.2E) XP Rabbit mAb

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Phospho-Akt (Ser473) (193H12) Rabbit mAb (antibody)

RRID:AB_331168

This monoclonal targets Phospho-Akt (Ser473) (193H12) Rabbit mAb

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Akt Antibody (antibody)

RRID:AB_329827

This polyclonal targets Akt

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Phospho-EGF Receptor (Tyr1068) (D7A5) XP Rabbit mAb (antibody)

RRID:AB_2096270

This monoclonal targets Phospho-EGF Receptor (Tyr1068)

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EGF Receptor (D38B1) XP Rabbit mAb (antibody)

RRID:AB_2246311

This monoclonal targets EGF Receptor

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Chk2 (D9C6) XP Rabbit mAb (antibody)

RRID:AB_11178526

This monoclonal targets Chk2 (D9C6) XP Rabbit mAb

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ATR Antibody (antibody)

RRID:AB_2227860

This polyclonal targets ATR

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Phospho-ATM (Ser1981) (D6H9) Rabbit mAb (antibody)

RRID:AB_10835213

This monoclonal targets ATM protein

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ATM (D2E2) Rabbit mAb (antibody)

RRID:AB_2062659

This monoclonal targets ATM (D2E2) Rabbit mAb

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Lamin A/C Antibody (antibody)

RRID:AB_2136278

This polyclonal targets Lamin A/C

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Rad51 (H-92) (antibody)

RRID:AB_2253533

This polyclonal targets RAD51

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Bek (C-17) (antibody)

RRID:AB_631509

This polyclonal targets FGFR2

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RPA 32 kDa subunit (H-100) (antibody)

RRID:AB_2238546

This polyclonal targets RPA2

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PTEN (N-19) (antibody)

RRID:AB_654895

This polyclonal targets PTEN

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PTEN (A2B1) (antibody)

RRID:AB_628187

This monoclonal targets PTEN

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FVB/N-Tg(EIIa-cre)C5379Lmgd/J (organism)

RRID:IMSR_JAX:003314

Mus musculus with name FVB/N-Tg(EIIa-cre)C5379Lmgd/J from IMSR.

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HEK293T (cell line)

RRID:CVCL_0063

Cell line HEK293T is a Transformed cell line with a species of origin Homo sapiens (Human)

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C57BL/6J (organism)

RRID:IMSR_JAX:000664

Mus musculus with name C57BL/6J from IMSR.

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GraphPad Prism (software resource)

RRID:SCR_002798

Statistical analysis software that combines scientific graphing, comprehensive curve fitting (nonlinear regression), understandable statistics, and data organization. Designed for biological research applications in pharmacology, physiology, and other biological fields for data analysis, hypothesis testing, and modeling.

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FVB.129-Cdkn2atm1Rdp/Nci (organism)

RRID:IMSR_NCIMR:01XB2

Mus musculus with name FVB.129-Cdkn2atm1Rdp/Nci from IMSR.

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Crl:NU-Foxn1nu (organism)

RRID:IMSR_CRL:088

Mus musculus with name Crl:NU-Foxn1nu from IMSR.

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U-87MG ATCC (cell line)

RRID:CVCL_0022

Cell line U-87MG ATCC is a Cancer cell line with a species of origin Homo sapiens (Human)

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Anti-ATR, phospho (Ser428) Antibody, Unconjugated (antibody)

RRID:AB_2290281

This polyclonal targets ATR, phospho (Ser428)

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C57BL/6J (organism)

RRID:IMSR_JAX:000664

Mus musculus with name C57BL/6J from IMSR.

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HEK293T (cell line)

RRID:CVCL_0063

Cell line HEK293T is a Transformed cell line with a species of origin Homo sapiens (Human)

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FVB/N-Tg(EIIa-cre)C5379Lmgd/J (organism)

RRID:IMSR_JAX:003314

Mus musculus with name FVB/N-Tg(EIIa-cre)C5379Lmgd/J from IMSR.

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GraphPad Prism (software resource)

RRID:SCR_002798

Statistical analysis software that combines scientific graphing, comprehensive curve fitting (nonlinear regression), understandable statistics, and data organization. Designed for biological research applications in pharmacology, physiology, and other biological fields for data analysis, hypothesis testing, and modeling.

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Crl:NU-Foxn1nu (organism)

RRID:IMSR_CRL:088

Mus musculus with name Crl:NU-Foxn1nu from IMSR.

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FVB.129-Cdkn2atm1Rdp/Nci (organism)

RRID:IMSR_NCIMR:01XB2

Mus musculus with name FVB.129-Cdkn2atm1Rdp/Nci from IMSR.

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