title: Lack of Immunomodulatory Interleukin-27 Enhances Oncogenic Properties of Mutant p53 In Vivo.
abstract: p53 is mutated in about 50% of human cancers, mostly through missense mutations. Expression of mutant p53 is associated with poor clinical outcomes or metastasis. Although mutant p53 is inherently instable, various stressors such as DNA damage or expression of the oncogenic Kras or c-myc affect the oncogenic properties of mutant p53. However, the effects of inflammation on mutant p53 are largely unknown. IL27 is an important immunomodulatory cytokine, but its impact on mutant p53-driven tumorigenesis has not been reported.
  
  
  
  IL27RA(-/-) mice were bred with mutant p53 heterozygous (p53(R172H/+)) mice to obtain IL27RA(-/-)p53(H/+) and IL27RA(-/-)p53(H/H) mice. Mouse survival and tumor spectra for the cohort were analyzed. Stability of p53 protein was analyzed via IHC and Western blot analysis.
  
  
  
  This study unraveled that lack of IL27 signaling significantly shortened the survival duration of mice with tumors expressing both copies of the mutant p53 gene (Li-Fraumeni mouse model). Interestingly, in mice that were heterozygous for mutant p53, lack of IL27 signaling not only significantly shortened survival time but also doubled the incidence of osteosarcomas. Furthermore, lack of IL27 signaling is closely associated with increased mutant p53 stability in vivo from early age.
  
  
  
  These results suggest that IL27 signaling modulates the oncogenic properties of mutant p53 in vivo Clin Cancer Res; 22(15); 3876-83. ©2016 AACR.
authors.affiliation: Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas.
authors.forename: Denada
authors.initials: D
authors.lastname: Dibra
authors.affiliation: Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas.
authors.forename: Abhisek
authors.initials: A
authors.lastname: Mitra
authors.affiliation: Banfield Pet Hospital, Sugar Land, Texas.
authors.forename: Melisa
authors.initials: M
authors.lastname: Newman
authors.affiliation: Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas.
authors.forename: Xueqing
authors.initials: X
authors.lastname: Xia
authors.affiliation: Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas.
authors.forename: Jeffry J
authors.initials: JJ
authors.lastname: Cutrera
authors.affiliation: Department of Veterinary Medicine and Surgery, The University of Texas MD Anderson Cancer Center, Houston, Texas.
authors.forename: Mihai
authors.initials: M
authors.lastname: Gagea
authors.affiliation: Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas.
authors.forename: Eugenie S
authors.initials: ES
authors.lastname: Kleinerman
authors.affiliation: Department of Genetics, The University of Texas MD Anderson Cancer Center, Houston, Texas.
authors.forename: Guillermina
authors.initials: G
authors.lastname: Lozano
authors.affiliation: Department of Pediatrics, The University of Texas MD Anderson Cancer Center, Houston, Texas. sli4@mdanderson.org.
authors.forename: Shulin
authors.initials: S
authors.lastname: Li
mesh_terms: D000818:Animals; D045744:Cell Line, Tumor; D002465:Cell Movement; D049109:Cell Proliferation; D002471:Cell Transformation, Neoplastic / Q000235:genetics* / Q000276:immunology* / Q000378:metabolism; D004195:Disease Models, Animal; D005838:Genotype; D064593:Heterografts; D006801:Humans; D007150:Immunohistochemistry; D056747:Immunomodulation; D064094:Interleukin-27 / Q000378:metabolism*; D051379:Mice; D018345:Mice, Knockout; D009154:Mutation; D018123:Receptors, Interleukin / Q000378:metabolism; D015398:Signal Transduction; D016159:Tumor Suppressor Protein p53 / Q000235:genetics* / Q000378:metabolism*; D055114:X-Ray Microtomography
chemical_list: C112441:IL27RA protein, human; D064094:Interleukin-27; D018123:Receptors, Interleukin; D016159:Tumor Suppressor Protein p53